screen assembly for sieving materials, and method for making a screen assembly for sieving materials

专利摘要:
SCREEN ASSEMBLY FOR SCREENING MATERIALS, AND, METHOD FOR MANUFACTURING A SCREEN ASSEMBLY FOR SCREENING MATERIALS Screening members, screening assemblies, methods for manufacturing screening members and assemblies and methods for screening materials are provided for vibrating screening machines that incorporate the use of injection molded materials. The use of injection molded screen elements provides, inter alia: variant sieving surface configurations; fabrication of fast and relatively simple screen assembly and a combination of mechanical and electrical properties of tough screen assembly, which includes hardness, wear and chemical resistance. Embodiments of the present invention use thermoplastic injection molded material.
公开号:BR112014029429B1
申请号:R112014029429-1
申请日:2013-03-13
公开日:2020-07-21
发明作者:Keith F. Wojciechowski
申请人:Derrick Corporation；
IPC主号:

专利说明:

[0001] [001] In general, the present disclosure refers to the screening of material. More particularly, the present disclosure relates to screening members, screening assemblies, methods for making screening members and assemblies and methods for screening materials. FUNDAMENTALS
[0002] [002] The screening of material includes the use of vibrating screening machines. Vibrating screening machines provide the ability to stimulate an installed screen such that the materials placed on the screen can be separated to a desired level. Disproportionate materials are separated from smaller materials. Over time, the screens wear out and require replacement. As such, the screens are designed to be replaceable.
[0003] [003] The replacement screen assemblies must be securely attached to a vibrating screening machine and are subject to large vibratory forces. Replacement screens can be attached to a vibrating screening machine by tensioning members, compression members or stapling members.
[0004] [004] Replacement screen assemblies are typically made of metal or a thermoset polymer. The material and configuration of the replacement screens are specific to a screening application. For example, due to their relative durability and capacity for fine sieving, metal screens are often used for wet applications in the oil and gas industry. Traditional thermoset polymeric screens (eg, molded polyurethane screens), however, are not durable and are unlikely to withstand the rough conditions of such wet applications and are often used in dry applications, such as applications in the mining industry.
[0005] [005] The manufacture of thermoset polymeric screens is relatively complicated, time consuming and prone to errors. Typical thermoset polymeric screens that are used with vibrating sieving machines are manufactured by combining separate liquids (eg, polyester, polyether, and a curator) that react chemically and then allow the mixture to cure over a period of time in one mold. When making screens with fine openings, for example, from approximately 43 microns to approximately 100 microns, this process can be extremely difficult and time consuming. In fact, to create fine openings in a screen, the channels in the molds through which the liquid passes through must be very small (for example, in the order of 43 microns) and very often the liquid does not reach all the cavities of the mold. As a result, complicated procedures are often implemented requiring strict attention to pressures and temperatures. Since a relatively large single screen (for example, two feet (60.96 cm) by three feet (91.44 cm) or larger) is made in a mold, a flaw (for example, a hole, that is, a where the liquid will not reach) will spoil the entire screen. Thermoset polymeric screens are typically manufactured by molding an assembly structure of an entire screen as a large screening piece can have openings ranging from approximately 43 microns to approximately 4000 microns in size. The sieving surface of conventional thermoset polymeric screens usually has a uniform flat configuration.
[0006] [006] Thermofixed polymeric screens are relatively flexible and are often attached to a vibrating sieving machine using tensioning members that pull the edges of the thermofixed polymeric screen apart from each other and hold a lower surface of the thermoformed polymeric screen against the surface of a vibrating screening machine. To avoid deformation when being tensioned, thermoset polymeric assemblies can be molded with aramid fibers that work in the direction of tensioning (see, for example, U. S. Patent No. 4,819,809). If a compressive force is applied to the side edges of typical thermoset polymeric webs, it must bend or curl, thus making the screening surface relatively ineffective.
[0007] [007] In contrast to the thermoset polymeric screens, the metal screens are rigid and can be compressed or tensioned in a vibrating screening machine. Wire mesh assemblies are often manufactured from multiple metal components. The fabrication of wire mesh assemblies typically includes: fabricating a screening material, often three layers of a woven wire mesh; manufacture a metallic reinforcement plate with openings and connect the sieving material to the metallic reinforcement plate with openings. The layers of fabric and wire can be finely woven with openings in the range of approximately 30 microns to approximately 4000 microns. The entire sieving surface of conventional metal assemblies is usually a relatively uniform flat configuration or a relatively uniform corrugated configuration.
[0008] [008] It is critical for the evaluation performance of screen assemblies (thermoset polymer assemblies and metallic type assemblies) for vibrating screening machines the size of the screening surface openings, structural stability and durability of the screening surface, structural stability of the entire unit, chemical properties of the unit components, and the unit's ability and availability to operate at various ambient temperatures. The disadvantages of conventional metal assemblies include the loss of stability and durability of the sieving surface structure formed by the woven wire mesh layers, blocking (covering the sieving openings by particles) of the sieving surface, weight of the total structure, time and costs associated with manufacturing or purchasing each of the component members and assembly time and costs. Because wire fabric is often outsourced by fabric manufacturers and is often purchased from weavers or wholesalers, quality control can be extremely difficult and there are often problems with the wire fabric. Imperfect wire fabric can result in screen performance problems and constant monitoring and testing is required.
[0009] [009] One of the biggest problems with conventional metal assemblies is the lock. A new wire mesh may initially have a relatively large open sieving area, but during the time when the screen is exposed to particles, the sieving openings cover (ie block) and the sieving area is open and the screen efficiency alone is reduced relatively quickly. For example, a weft screen assembly 140 (having three free layers of woven fabric) can have an initial open sieving area of 20 to 24%. When the screen is used, however, the open sieving area can be reduced by 50% or more.
[0010] [0010] Conventional wire mesh assemblies also lose large amounts of open sieving area because of their construction, which includes adhesives, reinforcement plates, bonding layers of plastic sheets of wire fabric together, etc.
[0011] [0011] Another major problem with conventional metal assemblies is the life of the screen. Conventional metal assemblies don't typically fail because they get tired, but instead they fail because of fatigue. That is, the wires of the woven wire fabric often break down due to the up and down movement to which they are subjected during vibratory loading.
[0012] [0012] The disadvantages of conventional thermoset polymer screens also include loss of stability and durability. Additional disadvantages include inability to withstand compression-type loading and inability to withstand high temperatures (for example, typically a thermoset polymeric type screen will begin to fail or experience performance problems at temperatures above 130 ° F (54.44 ° C), especially, screens with fine openings, for example, approximately 43 microns to approximately 100 microns). In addition, as discussed above, manufacturing is complicated, time consuming and error prone. Also, the molds used to manufacture the thermoset polymeric screens are expensive and can fail or the slightest damage to them will ruin the entire mold and require replacement, which can result in costly downtime in the manufacturing process.
[0013] [0013] Another disadvantage for both conventional metallic screens and thermofixed polymeric screens is the limitation of the screen surface configurations that are available. Existing sieving surfaces are manufactured with relatively uniform opening sizes everywhere and a relatively uniform surface configuration everywhere, whether the sieving surface is flat or wavy.
[0014] [0014] Conventional polymer-type fabrics referred to in US Conditional Application No. 61 / 652,039 (also referred to here as traditional polymeric fabrics, existing polymeric fabrics, typical polymeric fabrics or, simply, polymeric fabrics) refer to conventional thermoset polymeric fabrics described in US Conditional Patent Application No. 61 / 714,882 and the conventional thermoset polymeric fabrics described here (also referred to here and in US Conditional Patent Application No. 61 / 714,882 as traditional thermoset polymeric fabrics, existing thermoset polymeric fabrics, thermoset polymeric fabrics typical or simply simple thermosetting screens). Consequently, the conventional polymeric type fabrics referred to in US Conditional Application No. 61 / 652,039 are the same conventional thermofixed polymeric fabrics referred to here and in US Conditional Patent Application No. 61 / 714,882, and can be manufactured with extremely small screening apertures. (as described here and in US Conditional Patent Application No. 61 / 714,882) but have all the disadvantages (as described here and in US Conditional Patent Application No. 61 / 714,882) with respect to conventional thermoset polymeric fabrics, which includes loss of structural stability and durability, inability to withstand compression-type loading, inability to withstand high temperatures and complicated, time-consuming, error-prone manufacturing methods.
[0015] [0015] There is a need for screening members, screening assemblies, methods for manufacturing screening members and assemblies and methods for screening versatile and improved materials for vibrating screening machines that incorporate the use of injection molded materials (for example, thermoplastics) having improved mechanical and chemical properties. SUMMARY OF THE INVENTION
[0016] [0016] The present disclosure is an improvement on the existing screen assemblies and methods for evaluating and manufacturing the screen assembly and parts thereof. The present invention provides screening members, screening assemblies, methods for making screening members and assemblies and methods for screening extremely versatile and improved materials for vibrating screening machines that incorporate the use of injection molded materials having improved properties, which include properties mechanical and chemical. In certain embodiments of the present invention, a thermoplastic is used as an injection molded material. The present invention is not limited to thermoplastic injection molded materials and in the embodiments of the present invention other materials can be used having similar mechanical and / or chemical properties. In the embodiments of the present invention, multiple injection molded web elements are securely connected to the subscreen structures. The sub-screens are attached together to form the screen assembly structure, having a sieving surface that includes multiple screen elements. The use of injection molded screen elements with the various embodiments described here provides, inter alia, for: variant sieving surface configurations; fast and relatively simple fabric assembly fabrication and a combination of supporting the mechanical, chemical and electrical fabric assembly properties, which includes toughness, wear resistance and chemicals.
[0017] [0017] Embodiments of the present invention include screen assemblies that are configured to have relatively large open assessment areas having small structurally stable screening openings for vibrating screening applications. In the embodiments of the present invention, the screening apertures are very small (for example, as small as approximately 43 microns) and the screen elements are large enough (for example, an inch by an inch, an inch by two inches) , two inches by three inches, etc.) to take full screen screen assembly practice (for example, two feet by three feet, three feet by four feet, etc.). The manufacture of small sieving apertures for fine sieving applications requires injection molding of very small structural members that actually form the sieving apertures. These structural members are injection molded to be integrally formed with the structure of the screen element. Importantly, the structural members are small enough (for example, in certain applications they can be of the order of approximately 43 microns in the sieving surface width) to provide an effective total open sieving area and form part of the element structure full screen that is large enough (for example, two inches by three inches) to make it practical to assemble a relatively large complete sieving surface (for example, two feet by three feet) from these.
[0018] [0018] In an embodiment of the present invention, a thermoplastic material is injection molded to form sieving elements. Previously, thermoplastics were not used in the manufacture of vibrating screens with fine-sized openings (for example, approximately 43 microns to approximately 1000 microns) because it must be extremely difficult, if not impossible, to mold a relatively vibrating screening structure by injection large simple having fine openings and obtaining the open sieving area needed for competitive performance in vibrating sieving applications.
[0019] [0019] According to an embodiment of the present disclosure, a screen assembly is provided being: structurally stable and can be subjected to various loading conditions, which includes compression, tensioning and stapling; can withstand large vibrational forces; includes multiple injection molded screen elements which, due to their relatively small size, can be manufactured with extremely small aperture sizes (having dimensions as small as approximately 43 microns); eliminates the need for wire fabric; it is light weight; it is recyclable; it is simple and easy to assemble; can be manufactured in multiple different configurations, which includes having various screen opening sizes across the screen and having various sieving surface configurations, for example, various combinations of flat and wavy sections and can be manufactured with specific materials and nanomaterials of application. In addition, each screen assembly can be customized to a specific application and can be manufactured simply and easily with various sizes and opening configurations depending on the specifications provided by an end user. Embodiments of the present invention can be applied to various applications, which include wet and dry applications and can be applied across the various industries. The present invention is not limited to the oil and gas industry and the mining industry, this can be used in any industry that requires separation of materials using vibrating screening machines, which includes pulp and paper, chemicals, pharmaceuticals and others.
[0020] [0020] In an exemplary embodiment of the present invention, a screen assembly is provided that substantially improves the screening of materials using a thermoplastic injection molded screen element. The multiple thermoplastic polymer injection molded screen elements are securely connected to the sub-screen structures. The sub-screens are attached together to form the screen mounting structures, having a sieving surface that includes multiple screen elements. Each screen element and subscreen can have different shapes and configurations. Injection molding of individual thermoplastic screen elements allows for the precise fabrication of sieve openings, which can be as small as approximately 43 microns in size. The grid structure can be substantially rigid and can provide durability against damage or deformation under substantial vibrating load weights subjected to when attached to a vibrating screening machine. In addition, the sub-screens, when assembled to form the complete screen assembly, are strong enough not only to withstand the vibratory load, but also the forces required to secure the screen assembly to the vibratory screening machine, which includes compression loads large loads, tension loads and / or stapling loads. Also, the openings in the sub-screens structurally support the screen elements and transfer of vibrations from the vibrating sieving machine to the elements that form the sieving openings, thereby optimizing the sieving performance. The screen elements, sub-screens and / or any other components of the screen assembly may include nanomaterials and / or fiberglass which, in addition to the other benefits, provide durability and strength.
[0021] [0021] In accordance with an exemplary embodiment of the present disclosure, a screen assembly is provided having a screen element that includes a screen element sieving surface with a series of sieve openings and a subscreen that includes structural members multiple elongates forming a grid structure having grid openings. The screen element extends over at least one of the grid openings and is connected to an upper surface of the subscreen. The multiple independent subscreens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly screen surface having multiple screen element screen surfaces. The screen element includes substantially parallel end portions and substantially parallel side edge portions substantially perpendicular to the end portions. The screen element further includes a screen element support member and a second screen element support member orthogonal to the screen element support member. The screen element support member extends between the end portions and is approximately parallel to the side edge portions. The second screen element support member extends between the side edge portions and is approximately parallel to the end portions. The web element includes a first series of reinforcement members substantially parallel to the side edge portions and a second series of reinforcement members substantially parallel to the end portions. The screen element sieving surface includes screen surface elements that form the sieve openings. The final portions, side edge portions, first and second support members and first and second series of reinforcement members that structurally stabilize the screen surface elements and sieving openings. The screen element is formed as a simple thermoplastic injection molded part.
[0022] [0022] The sieving openings can be rectangular, square, circular and oval or any other shape. The screen surface elements can operate in parallel with the final portions and form the sieve openings. The screen surface element can also move perpendicular to the end portions and form the sieve openings. The different combinations of the rectangular, square, circular and oval sieving openings (or other shapes) can be incorporated together and depending on the shape used it can move parallel and / or perpendicular to the final portions.
[0023] [0023] The screen surface elements can work in parallel with the final portions and can be elongated members that form the sieving openings. The screening openings can be elongated slits having a distance of approximately 43 microns to approximately 4000 microns between the inner surfaces of the adjacent screen surface elements. In certain embodiments, the screening apertures may be approximately 70 microns to approximately 180 microns apart between the inner surfaces of the adjacent screen surface elements. In other embodiments, the screening apertures can be approximately 43 microns to approximately 106 microns apart between the inner surfaces of the adjacent screen surface elements. In the embodiments of the present invention, the screening apertures can have a width and a length, the width can be about 0.043 mm to about 4 mm and the length can be about 0.086 mm to about 43 mm. In certain embodiments, the width to length ratio can be approximately 1: 2 to approximately 1: 1000.
[0024] [0024] The multiple size variation subscreens can be combined to form a screen mounting support structure by the screen elements. Alternatively, a simple sub-screen may be molded by thermoplastic injection, or otherwise constructed, to form the total screening assembly support structure by the multiple individual screen elements.
[0025] [0025] In embodiments using multiple subscreens, a first subscreen may include a first base member having a first fastener that joins with a second fastener from a second base member of a second subscreen, the first and second fasteners that hold the first and second subscreens together. The first fastener can be a clamp and the second fastener can be a clamp opening, where the clamp fits into the clamp opening and securely holds the first and second subscreens together.
[0026] [0026] The first and second screen element support members and the final screen element portions can include a screen element link arrangement configured to join with a subscreen link arrangement. The subscreen connection arrangement can include elongated connection members and the screen element connection arrangement can include connection openings that join with the elongated connection members that securely connect the screen element to the subscreen. A portion of the elongated connecting members can be configured to extend into the connection openings of the screen element and slightly above the screen element sieving surface. The connection openings can include a tapered hole or they can simply include an opening without any taper. The portion of the elongated connecting members above the sieving surface of the sieving element can be cast and can fill the tapered bore, fixing the screen element to the subscreen. Alternatively, the portion of the elongated connecting members extending through and above the opening in the sieving surface of the sieving element can be melted such that it forms a pearl on the sieving surface of the sieving element and fixes the screen element to the subscreen .
[0027] [0027] The elongated structural members may include substantially parallel subscreen end members and substantially parallel subscreen side members substantially perpendicular to the subscreen end members. The elongated structural members may further include a first subscreen support member and a second subscreen support member orthogonal to the first subscreen support member. The first subscreen support member can extend between the end subscreen members and can be approximately parallel to the subscreen side members. The second subscreen support member can extend between the subscreen side members and can be approximately parallel to the subscreen end members, and substantially perpendicular to the subscreen edge members.
[0028] [0028] The grid structure can include a first and a second grid structure that form a first and a second grid openings. The screen element can include a first and a second screen element. The subscreen can have a groove portion and a base portion. The first and second grid structures can include the first and second angled surfaces that reach the maximum groove point and extend downwardly from the peak portion to the base portion. The first and second screen elements can extend over the first and second angled surfaces, respectively.
[0029] [0029] According to an exemplary embodiment of the present invention, a screen assembly is provided having a screen element that includes a screen element sieving surface with a series of sieve openings and a subscreen that includes structural members multiple elongates forming a grid structure having grid openings. The screen element extends over at least one grid opening and is attached to an upper surface of the subscreen. The multiple sub-screens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly screening surface comprised of multiple screen element screening surfaces. The screen element is a simple thermoplastic injection molded part.
[0030] [0030] The screen element can include substantially parallel end portions and substantially parallel side edge portions substantially perpendicular to the end portions. The screen element may further include a screen element support member and a second screen element support member orthogonal to the screen element support member. The screen member support member can extend between the end portions and can be approximately parallel to the side edge portions. The second screen member support member can extend between the side edge portions and can be approximately parallel to the end portions. The web element may include a first series of reinforcement members substantially parallel to the side edge portions and a second series of reinforcement members substantially parallel to the end portions. The screen element may include elongated screen surface elements that run parallel to the end portions and that form the sieve openings. The end portions, side edge portions, first and second support members, first and second series of reinforcement members can structurally stabilize the screen surface elements and the sieving openings.
[0031] [0031] The first and second series of reinforcement members may be less than a thickness of the final portions, side edge portions and the first and second screen element support members. The end portions and side edge portions and the first and second screen element support members can form four rectangular areas. The first series of reinforcement members and the second series of reinforcement members can form multiple rectangular support grids within each of the four rectangular areas. The sieving openings can have a width of approximately 43 microns to approximately 4000 microns between the inner surfaces of each of the screen surface elements. In certain embodiments, the sieving apertures can have a width of approximately 70 microns to approximately 180 microns between the inner surfaces of each of the screen surface elements. In other embodiments, the sieving apertures can have a width of approximately 43 microns to approximately 106 microns between the inner surfaces of each of the screen surface elements. In the embodiments of the present invention, the sieving openings can have a width of about 0.043 mm to about 4 mm and a length of about 0.086 mm to about 43 mm. In certain embodiments, the width to length ratio can be approximately 1: 2 to approximately 1: 1000. The screen elements can be flexible.
[0032] [0032] The subscreen end members, the subscreen side members and the first and second subscreen support members can form eight rectangular grid slits. A first screen element can extend over four of the grid openings and a second screen element can extend over the other four openings.
[0033] [0033] A central portion of the sieving surface of the sieving element can flex slightly when subjected to a load. A subscreen can be substantially rigid. The sub-screen can also be a simple thermoplastic injection molded part. At least one of the subscreen end members and the subscreen side members can include fasteners configured to join with other subscreen fasteners, in which the fasteners can be clamps and staple openings that hold in place and securely connect the subscreens together.
[0034] [0034] The sub-screen may include: triangular end pieces substantially parallel, median triangular pieces substantially parallel to the triangular end pieces, the first and second middle support substantially perpendicular to the triangular end pieces and which extend between the triangular end pieces, the first and second base support substantially perpendicular to the triangular end pieces and extend between the triangular end pieces and a central groove substantially perpendicular to the triangular end pieces and extend between the triangular end pieces. A first edge of the triangular end pieces, the median triangular pieces, and the first medium support, the first base support and the central groove can form a first upper surface of the subscreen having a first series of the grid openings. And a second edge of the triangular end pieces, the median triangular pieces, and the second middle support, the second base support and the central groove can form a second upper surface of the subscreen having a second series of grid openings. The first upper surface can slope down from the central groove to the first base support and the second upper surface can slope down from the central groove to the second base support. A first and a second screen element can extend over the first series and second series of grid openings, respectively. The first edges of the triangular end pieces, the median triangular pieces, the first medium support, the first base support and the central groove can include a first subscreen connection arrangement configured to securely join with a first connection arrangement screen element of the first screen element. The second ends of the triangular end pieces, the median triangular pieces, the second medium support, the second base support and the central groove can include a second subscreen connection arrangement configured to securely join with a second connection arrangement of the screen element of the second screen element. The first and second sub-screen connection arrangements may include elongated connection members and the first and second connection arrangement of the screen element may include connection openings that connect with the extended connection members thereby securely connecting the first and second screen elements to the first and second subscreens, respectively. A portion of the elongated connection members may extend through the connection openings of the screen element and slightly above the first and second screen surfaces of the screen element.
[0035] [0035] The first and second screen elements each can include the substantially parallel end portions and substantially parallel side edge portions substantially perpendicular to the end portions. The first and second screen elements can each include a screen element support member and a second screen element support member orthogonal to the screen element support member, the screen element support member extending between the end portions and being approximately parallel to the side edge portions, the second screen element support member extending between the side edge portions and can be approximately parallel to the end portions. The first and second web elements can each include a first series of reinforcement members substantially parallel to the side edge portions and a second series of reinforcement members substantially parallel to the end portions. The first and second screen elements can each include elongated screen surface elements that run parallel to the end portions and form the sieve openings. The end portions, side edge portions, first and second support members, first and second series of reinforcement members can structurally stabilize the screen surface elements and sieve openings.
[0036] [0036] One of the first and second base supports may include fasteners that hold the multiple sub-screens together, in which the fasteners can be clamps and clamp openings that hold in place and securely connect the sub-screens together.
[0037] [0037] The screen assembly can include a first, a second, a third and a fourth screen element. The first series of grid openings can be eight openings formed by the first edge of the triangular end pieces, the triangular median pieces, and the first medium support, the first base support and the central groove. The second series of grid openings can be eight openings formed by the second edge of the triangular end pieces, the triangular median pieces, the second medium support, the second base support and the central groove. The first screen element can extend over four of the grid openings of the first series of grid openings and the second screen element can extend over the other four openings of the first series of grid openings. The third screen element can extend over four of the grid openings of the second series of grid openings and the fourth screen element can extend over the other four openings of the second series of grid openings. A central portion of the first, second, third and fourth sieving surface of the sieving element can flex slightly when subjected to a load. The sub-screen can be substantially rigid and can be the simple thermoplastic injection molded part.
[0038] [0038] In accordance with an exemplary embodiment of the present disclosure, a screen assembly is provided having a screen element that includes a screen element sieving surface with sieve openings and a sub-screen that includes a grid structure with grid openings. The screen element extends over the grid openings and is attached to the subscreen surface. The multiple sub-screens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly sieving surface that includes the multiple screen element sieving surfaces. The screen element is a thermoplastic injection molded part.
[0039] [0039] The screen assembly may also include a first thermoplastic injection molded screen element and a second thermoplastic injection molded screen element and the grid structure may include the first and second grid structures that form a first grid and a second grid opening. The subscreen can include a groove portion and a base portion, the first and second grid structures which include first and second angular surfaces that reach the maximum groove point and extend downwardly from the peak portion to the base portion. The first and second screen elements can extend over the first and second angled surfaces, respectively. The first and second angled surfaces can include a subscreen connection arrangement configured to securely connect with a screen element connection arrangement. The sub-screen connection arrangement can include elongated connection members and the screen element connection arrangement can include openings that join with the elongated connection members thereby securely connecting the screen element to the subscreen.
[0040] [0040] The sub-screen can be substantially rigid and can be the piece molded by simple thermoplastic injection. The base portion section may include a first and a second fastener that secure a sub-screen to a third and a fourth fastener to another subscreen. The first and third fasteners can be staples and the second and fourth fasteners can be staple openings. The clamps can be secured in the clamp openings and securely connect one subscreen and the other subscreen together.
[0041] [0041] The sub-screens can form a concave structure and the sieving surface of continuous screen assembly can be concave. The subscreens can form a flat structure and the continuous screen assembly sieving surface can be flat as subscreens can form a convex structure and the continuous screen assembly sieving surface can be convex.
[0042] [0042] The screen assembly can be configured to form a predetermined concave shape when subjected to a compressive force by a compression assembly of a vibrating screening machine against at least one side member of the vibrating screen assembly when placed on the screening machine. vibratory screening. The predetermined concave shape can be determined according to a shape of a vibrating screening machine. The screen assembly can have a joining surface that joins the screen assembly to a surface of the vibrating sieving machine, which joins the surface can be rubber, metal (for example, steel, aluminum, etc.), a composite material, a plastic material or any other suitable material. The screen assembly may include a joining surface configured to interface with a joining surface of a vibrating screening machine such that the screen assembly is guided in a fixed position on the vibrating screening machine. The joining surface can be formed in a portion of at least one subscreen. The screen mounting joint surface may be a notch formed at one corner of the screen assembly or a notch formed approximately in the middle of a side edge of the screen assembly. The screen assembly may have an arcuate surface configured to mate with the concave surface of the vibrating screen machine. The screen assembly may have a substantially rigid structure that does not deviate substantially when attached to the vibratory screening machine. The screen assembly may include a screen assembly joint surface configured such that it forms a predetermined concave shape when subjected to a compressive force by a member of a vibrating screening machine. The screen mounting joining surface can be formed such that this interface with a joining surface of the vibrating screening machine such that the screen mounting can be guided at a predetermined location on the vibrating screening machine. The screen assembly may include a load bar attached to an edge surface of the screen assembly subscreen, the load bar may be configured to distribute a load across a surface of the screen assembly. The screen assembly can be configured to form a predetermined concave shape when subjected to a compressive force by a compression member of a vibrating screen machine against the load bar of the vibrating screen assembly. The screen assembly can be concave in shape and can be configured to deflect and form a predetermined concave shape when subjected to a compressive force by a member of a vibrating screening machine.
[0043] [0043] A first series of subscreens can be formed in a central support structure assembly having a first fastener arrangement. A second series of sub-screens can be formed in a first end support structure assembly, second fastener arrangement. A third series of sub-screens may be formed in a second final support structure assembly having a third fastener arrangement. The first, second and third fastener arrangement can hold the first and second support structures to the central support assemblies. A side edge surface of the first final support structure assembly can form a first end of the screen assembly. A side edge surface of the second final support structure arrangement can form a second end of the screen assembly. A final surface of each of the first and second final support structure assemblies and central support structure assemblies can cumulatively form a first and a second side surface of the complete evaluation assembly. The first and second side surfaces of the screen assembly can be substantially parallel and the first and second end ends of the screen assembly can be substantially parallel and substantially perpendicular to the side surfaces of the screen assembly. The side surfaces of the screen assembly may include fasteners configured to fit at least one of a connector bar and a load distribution bar. Sub-screens may include secondary surfaces such that when the individual sub-screens are attached together to form the first and second support structure assemblies and the central support structure assembly as the first and second final support structure assemblies and the assembly of central support structure, each one forms a concave shape. The sub-screens may include the lateral surfaces formed such that when the individual sub-screens are fastened together to form the first and second support structure assemblies and the central support structure assembly as the first and second final support structure assemblies and the assembly of central support structure each, form a convex shape.
[0044] [0044] The screen elements can be affixed to the subscreens by at least one of a mechanical arrangement, an adhesive, heat marking and ultrasonic fusion.
[0045] [0045] In accordance with an exemplary embodiment of the present disclosure, a screen element is provided having: a screen element screening surface with screen surface elements that form a series of screening apertures; a pair of substantially parallel end portions; a pair of substantially parallel portions of side edges substantially perpendicular to the end portions; a screen element support member; a second screen element support member orthogonal to the screen element support member, the screen element support member extending between the end portions and being approximately parallel to the side edge portions, the second screen element support member screen extending between the side edge portions and being approximately parallel to the end portions and substantially perpendicular to the side edge portions; a first series of reinforcement members substantially parallel to the lateral edge portions; and a second series of reinforcement members substantially parallel to the final portions. The screen surface elements work in parallel with the final portions. The final portions, side edge portions, first and second support members, first and second series of reinforcement members that structurally stabilize the screen surface elements and sieving openings, and the screen element is a thermoplastic injection molded part simple.
[0046] [0046] According to an exemplary embodiment of the present disclosure, a screen element is provided having a screen element screening surface with screen surface elements that form a series of screening apertures; a pair of substantially parallel end portions; and a pair of substantially parallel portions of side edges substantially perpendicular to the end portions. The screen element is a thermoplastic injection molded part.
[0047] [0047] The screen element can also have a screen element support member; a second screen element support member orthogonal to the screen element support member, the screen element support member extending between the end portions and being approximately parallel to the side edge portions, the second screen element support member screen that extends between the lateral edge portions and is approximately parallel to the final portions; a first series of reinforcement members substantially parallel to the lateral edge portions; and a second series of reinforcement members substantially parallel to the final portions. The screen surface elements can work in parallel with the final portions. In certain embodiments, the screen surface elements can also be configured to move perpendicular to the end portions. The end portions, side edge portions, first and second support members, first and second series of reinforcement members can structurally stabilize the screen surface elements and sieve openings.
[0048] [0048] The screen element may also have a screen element connection arrangement molded integrally with the screen element and configured to join with a subscreen connection arrangement. The multiple sub-screens can form a screen assembly and the screen assembly can have a continuous screen assembly sieving surface that includes sieving surfaces of the multiple screen element.
[0049] [0049] According to an exemplary embodiment of the present disclosure, a method for fabricating a screen assembly for screening materials is provided and includes: determining the screen assembly performance specifications by the screen assembly; determining a screening aperture requirement for a screen element based on screen mounting performance specifications, the screen element which includes a screen element screening surface having screen apertures; determine a display configuration based on display assembly performance specifications, the display configuration that includes having the display elements arranged in at least one flat and one non-flat configuration; injection molding of the screen elements with a thermoplastic material; manufacture a subscreen configured to support the screen elements, the subscreen having a grid structure with grid openings in which at least one screen element extends over at least one grid opening and is attached to an upper surface of the subscreen, the upper surface of each subscreen that includes at least one of a flat surface and a non-flat surface that receives the screen elements; connect screen elements to subscreens; connecting subscreen assemblies together to form final screening structures and central screening structures; connecting the final screening structures to the central screening structures to form a screening screen structure; connecting a first connection bar to a first end of the screen screen structure; and connecting a second connection bar to a second end of the screen mesh structure to form the screen assembly, the screen assembly having a continuous screen screen surface assembly comprised of multiple screen element screen surfaces.
[0050] [0050] Screen mounting performance specifications can include at least one of dimensions, material requirements, open sieving area, cutoff point and capacity requirements for a sieving application. A lever can be connected to a tie bar. A label can be attached to a tie bar, where the label can include a description of the performance of the screen assembly. At least one of the screen element and the sub-screen may be the simple thermoplastic injection molded part. The thermoplastic material can include a nanomaterial. The subscreen can include at least one fastener base member that joins with the fasteners of other base members of other subscreens and attach the subscreens together. The fasteners can be clamps and clamp openings that hold in place and securely connect the sub-screens together.
[0051] [0051] According to an exemplary embodiment of the present disclosure, a method for fabricating a screen assembly for sieving materials is provided by injection molding a screen element with a thermoplastic material, the screen element that includes a surface screen element screening having screen apertures; fabricating a sub-screen that supports the screen element, the sub-screen having a grid structure with grid openings, the screen element that extends through at least one grid opening; securing the screen element to an upper surface of the subscreen; and bonding the multiple sub-screen assemblies together to form the screen assembly, the screen assembly having a continuous screen screening surface assembly made of the multiple screen element screening surfaces. The method may also include connecting a first connection bar to a first end of the screen assembly and connecting a second connection bar to a second end of the screen assembly. The first and second connecting bars can be connected as sub-screens together. The tie bar can be configured to distribute a load across the first and second ends of the screen assembly. The thermoplastic material can include a nanomaterial.
[0052] [0052] In accordance with an exemplary embodiment of the present disclosure, a method for screening a material is provided for connecting a screen assembly to a vibrating screening machine, the screen assembly which includes a screen element having a series of sieving openings that form a screen element sieving surface and a subscreen that includes multiple elongated structural members that form a grid structure having grid openings. The screen elements extend over the grid openings and are attached to an upper surface of the subscreen. The multiple sub-screens are attached together to form the screen assembly. The screen assembly has a continuous screen assembly screening surface comprised of multiple screen element screening surfaces. The screen element is a simple thermoplastic injection molded part. The material is sieved using a screen assembly.
[0053] [0053] In accordance with an exemplary embodiment of the present disclosure, a method for screening the material is provided including connecting a screen assembly to a vibrating screening machine and forming a top screening surface of the screen assembly in a concave shape. The screen assembly includes a screen element having a series of sieving apertures that form a screen element sieving surface and a sub-screen that includes multiple elongated structural members that form a grid structure having grid openings. The screen elements extend over the grid openings and are attached to an upper surface of the subscreen. The multiple sub-screens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly sieving surface comprised of multiple screen element sieving surfaces. The screen element is a simple thermoplastic injection molded part. The material is sieved using a screen assembly.
[0054] [0054] The embodiments of the example of the present disclosure are described in more detail below with reference to the attached figures. BRIEF DESCRIPTION OF THE DRAWINGS
[0055] [0055] Figure 1 is an isometric view of a screen assembly, according to an exemplary embodiment of the present invention.
[0056] [0056] Figure 1A is an extended view of a break portion of the screen assembly shown in Figure 1.
[0057] [0057] Figure 1B is an isometric view below the screen assembly shown in Figure 1.
[0058] [0058] Figure 2 is an isometric top view of a fabric element, according to an exemplary embodiment of the present invention.
[0059] [0059] Figure 2A is a top view of the screen element shown in Figure 2.
[0060] [0060] Figure 2B is a lower isometric view of the screen element shown in Figure 2.
[0061] [0061] Figure 2C is a bottom view of the screen element shown in Figure 2.
[0062] [0062] Figure 2D is an extended top view of a breaking portion of the screen element shown in Figure 2.
[0063] [0063] Figure 3 is a top isometric view of a final subscreen, according to an exemplary embodiment of the present invention.
[0064] [0064] Figure 3A is a lower isometric view of the final subscreen shown in Figure 3.
[0065] [0065] Figure 4 is a top isometric view of a central subscreen, according to an exemplary embodiment of the present invention.
[0066] [0066] Figure 4A is a lower isometric view of the central subscreen shown in Figure 4.
[0067] [0067] Figure 5 is a top isometric view of a connection bar, according to an exemplary embodiment of the present invention.
[0068] [0068] Figure 5A is a lower isometric view of a connection bar shown in Figure 5.
[0069] [0069] Figure 6 is an isometric view of a screen subassembly, according to an exemplary embodiment of the present invention.
[0070] [0070] Figure 6A is an exploded view of the subassembly shown in Figure 6.
[0071] [0071] Figure 7 is a top view of the screen assembly shown in Figure 1.
[0072] [0072] Figure 7A is an extended cross section of section A-A of the screen assembly shown in Figure 7.
[0073] [0073] Figure 8 is a top isometric view of a screen assembly partially coated with the screen elements, according to an exemplary embodiment of the present invention.
[0074] [0074] Figure 9 is an exploded isometric view of the screen assembly shown in Figure 1.
[0075] [0075] Figure 10 is an exploded isometric view of a final subscreen showing the screen elements previous to the connection of the final subscreen, according to an exemplary embodiment of the present invention.
[0076] [0076] Figure 10A is an isometric view of the final subscreen shown in Figure 10 with the screen elements connected to it.
[0077] [0077] Figure 10B is a top view of the final subscreen shown in Figure 10A.
[0078] [0078] Figure 10C is a cross section of section B-B of the final subscreen shown in Figure 10A.
[0079] [0079] Figure 11 is an exploded isometric view of a central subscreen showing the screen elements previous to the connection of the central subscreen, according to an exemplary embodiment of the present invention.
[0080] [0080] Figure 11A is an isometric view of the central subscreen shown in Figure 11 with the screen elements connected to it.
[0081] [0081] Figure 12 is an isometric view of a vibrating screening machine having screen assemblies with concave screening surfaces installed therein, in accordance with an exemplary embodiment of the present invention.
[0082] [0082] Figure 12A is an extended isometric view of the discharge end of the vibratory screening machine shown in Figure 12.
[0083] [0083] Figure 12B is a front view of the vibratory screening machine shown in Figure 12.
[0084] [0084] Figure 13 is an isometric view of a vibrating screening machine with a simple screening surface having screen assemblies with concave screening surfaces installed therein, in accordance with an exemplary embodiment of the present invention.
[0085] [0085] Figure 13A is a front view of the vibratory screening machine shown in Figure 13.
[0086] [0086] Figure 14 is a front view of a vibrating screening machine having two separate concave screening surfaces with preformed screen assemblies installed on the vibrating screening machine, according to an exemplary embodiment of the present invention.
[0087] [0087] Figure 15 is a front view of a vibrating screening machine having a simple screening surface with a pre-formed screen assembly installed on the vibrating screening machine, according to an exemplary embodiment of the present invention.
[0088] [0088] Figure 16 is an isometric view of a subassembly of the end support structure, according to an exemplary embodiment of the present invention.
[0089] [0089] Figure 16A is an exploded isometric view of the end support structure subassembly shown in Figure 16.
[0090] [0090] Figure 17 is an isometric view of a subassembly of a central support structure, according to an exemplary embodiment of the present invention.
[0091] [0091] Figure 17A is an exploded isometric view of the central support structure subassembly shown in Figure 17.
[0092] [0092] Figure 18 is an exploded isometric view of a screen assembly, according to an exemplary embodiment of the present invention.
[0093] [0093] Figure 19 is a top isometric view of a flat screen assembly, according to an exemplary embodiment of the present invention.
[0094] [0094] Figure 20 is a top isometric view of a convex mesh assembly, according to an exemplary embodiment of the present invention.
[0095] [0095] Figure 21 is an isometric view of a screen assembly having sub-screens in the pyramid shape, according to an exemplary embodiment of the present invention.
[0096] [0096] Figure 21A is an extended view of section D of the screen assembly shown in Figure 21.
[0097] [0097] Figure 22 is a top isometric view of a final pyramid shaped subscreen, according to an exemplary embodiment of the present invention.
[0098] [0098] Figure 22A is a lower isometric view of the end pyramid shaped subscreen shown in Figure 22.
[0099] [0099] Figure 23 is a top isometric view of the central pyramid shaped subscreen, according to an exemplary embodiment of the present invention.
[0100] [00100] Figure 23A is a lower isometric view of the central pyramid shaped subscreen shown in Figure 23.
[0101] [00101] Figure 24 is an isometric view of a pyramid-shaped subassembly, according to an exemplary embodiment of the present invention.
[0102] [00102] Figure 24A is an exploded isometric view of the pyramid-shaped subassembly shown in Figure 24.
[0103] [00103] Figure 24B is an exploded isometric view of an end pyramid shaped subscreen showing the screen elements previous to the connection of the end pyramidal subscreen.
[0104] [00104] Figure 24C is an isometric view of the end pyramid shaped subscreen shown in Figure 24B having the screen elements connected to it.
[0105] [00105] Figure 24D is an exploded isometric view of the central pyramid shaped subscreen showing the previous screen elements to the connection of the central pyramid shaped subscreen, according to an exemplary embodiment of the present invention.
[0106] [00106] Figure 24E is an isometric view of the central pyramid shaped subscreen shown in Figure 24D having the screen elements connected to it.
[0107] [00107] Figure 25 is a top view of a screen assembly having the sub-screens in pyramid shape, according to an exemplary embodiment of the present invention.
[0108] [00108] Figure 25A is a cross-sectional view of section C-C of the screen assembly shown in Figure 25.
[0109] [00109] Figure 25B is an extended view of the section C-C shown in Figure 25A.
[0110] [00110] Figure 26 is an exploded isometric view of a screen assembly having flat and pyramid-shaped subassemblies, according to an exemplary embodiment of the present invention.
[0111] [00111] Figure 27 is an isometric view of a vibrating screening machine with two screening surfaces having assemblies with concave screening surfaces installed on it where the screen assemblies include flat and pyramidal shaped subassemblies, according to a shape of exemplary embodiment of the present invention.
[0112] [00112] Figure 28 is a top isometric view of a screen assembly having flat, pyramid-shaped subscreens without the screen elements, according to an exemplary embodiment of the present invention.
[0113] [00113] Figure 29 is a top isometric view of the screen assembly shown in Figure 28 where the subscreens are partially lined with the screen elements.
[0114] [00114] Figure 30 is a front view of a vibrating sieving machine with two sieving surfaces having assemblies with concave sieving surfaces installed in this where the screen assemblies include flat and pyramidal shaped subscreen, according to an embodiment exemplary of the present invention.
[0115] [00115] Figure 31 is a front view of a vibrating sieving machine with a simple screen surface having an assembly with a concave sieving surface installed on it where the screen assembly includes flat and pyramidal shaped subscreen according to a exemplary embodiment of the present invention.
[0116] [00116] Figure 32 is a front view of a vibrating screening machine with two screening surfaces having pre-formed screen assemblies with flat screening surfaces installed in this where the screen assemblies include flat and pyramid shaped subscreen according to with an exemplary embodiment of the present invention.
[0117] [00117] Figure 33 is a front view of a vibrating screening machine with a simple screening surface having a pre-formed screen assembly with a flat screening surface installed on it where the screen assembly includes flat and pyramid shaped subscreen , according to an exemplary embodiment of the present invention.
[0118] [00118] Figure 34 is an isometric view of the final subscreen shown in Figure 3 having a simple fabric element partially connected to it, according to an exemplary embodiment of the present invention.
[0119] [00119] Figure 35 is an extended view of the breaking of section E of the final subscreen shown in Figure 34.
[0120] [00120] Figure 36 is an isometric view of a screen assembly having pyramid shaped subscreens on a portion of the screen assembly, according to an exemplary embodiment of the present invention.
[0121] [00121] Figure 37 is a flow chart of the fabrication of the fabric assembly, according to an exemplary embodiment of the present invention.
[0122] [00122] Figure 38 is a flow chart of manufacture of a screen assembly, according to an exemplary embodiment of the present invention.
[0123] [00123] Figure 39 is an isometric view of a vibrating screening machine having a simple screen assembly with a flat screening surface installed on it with a cutting portion of the vibrating machine always showing a screen assembly, according to a shape of exemplary embodiment of the present invention.
[0124] [00124] Figure 40 is an isometric top view of an individual screen element, according to an exemplary embodiment of the present invention.
[0125] [00125] Figure 40A is an isometric top view of a pyramidal mesh element, according to an exemplary embodiment of the present invention.
[0126] [00126] Figure 40B is an isometric top view of four of the pyramidal screen elements shown in Figure 40A.
[0127] [00127] Figure 40C is an isometric top view of an inverted pyramidal mesh element, according to an exemplary embodiment of the present invention.
[0128] [00128] Figure 40D is a front view of the screen element shown in Figure 40C.
[0129] [00129] Figure 40E is an isometric top view of a structure of the screen element, according to an exemplary embodiment of the present invention.
[0130] [00130] Figure 40F is a front view of the structure of the screen element shown in Figure 40E.
[0131] [00131] Figures 41 to 43 are seen from the front cross-sectional profile of the screen elements, according to the exemplary embodiments of the present invention.
[0132] [00132] Figure 44 is an isometric top view of a pre-screening structure with the screen pre-assemblies according to an exemplary embodiment of the present invention.
[0133] [00133] Figure 44A is an isometric top view of the pre-sieve assembly shown in Figure 44, according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION
[0134] [00134] Similar reference characters indicate equal parts in several drawings.
[0135] [00135] Embodiments of the present invention provide a screen assembly that includes injection molded screen elements that are attached to a sub-screen. The multiple sub-screens are securely attached securely attached to each other to form the vibrating screen assembly, having a continuous sieving surface and are configured for use in a vibrating sieving machine. The full screen assembly structure is configured to withstand the stringent loading conditions encountered when assembled and operated on the vibrating screen machine. Injection-molded screen elements provide many advantages in the fabrication of screen assembly and vibratory screening applications. In certain embodiments of the present invention, the web elements are injection molded using a thermoplastic material.
[0136] [00136] The embodiments of the present invention provide injection molded screen elements that are of a practical size and configuration for the manufacture of vibrating screening assemblies and for use in vibrating screening applications. Several important considerations have been taken into account when configuring individual screen elements. The screen elements are provided that: are of an optimum size (large enough for the efficient assembly of a complete screen assembly structure yet small enough for the injection mold (micro-mold in certain embodiments) extremely small structures that form sieve openings while freezing is avoided (ie, material hardening in a mold before filling the mold); have an optimal open sieving area (the structures that form the openings and the support of the openings are of a minimum size to increase the total open area used to assess while maintaining, in certain embodiments, very small sieving openings necessary for properly separate materials in a specified pattern); have strength durability, can operate in a variety of temperature ranges; they are chemically resistant; they are structurally stable; they are highly versatile in the screen assembly manufacturing processes and are configurable in configurations customizable for specific applications.
[0137] [00137] Embodiments of the Present Invention provide Screen Elements that are manufactured with extremely precise Injection molding. The larger the screen element, the easier it is to assemble a complete set of vibrating screens. Simply put, the fewer parts there are to join. However, the larger the Screen Element, the more difficult it is for injection molding of extremely small structures, that is, the structures that form the sieve openings. It is important to minimize the size of the structures that form the sieving openings, in order to maximize the number of sieving openings in a screen element and thereby optimize the open sieving area for the sieving element and, in this way, the full screen assembly. In certain embodiments, the screen elements are provided being large enough (for example, an inch by an inch, an inch by two inches, two inches by three inches, etc.) to make it practical to mount a surface screen mount of full sieving (for example, two feet by three feet, three feet by four feet, etc.). The “relatively small” size (for example, an inch by an inch, an inch by two inches, two inches by three inches, etc.) is proportionally large when extremely small micro-molded structural membranes (for example, structural members as small as 43 microns). The larger the size of the total screen element, the smaller the size of the individual structural members that makes the process injection molding sieve openings more prone to error, such as freezing. In this way, the size of the screen elements must be practical for fabricating the screen assembly while at the same time small enough to eliminate problems, such as freezing when micro-molding to extremely small structures. The sizes of the screening elements may vary based on the material being injection molded, the size of the required screening apertures and the desired total open screening area.
[0138] [00138] Open screening area is a critical feature of vibratory screening assemblies. The average usable open sieving area (that is, the actual open area after taking into account the structural steel of the support members and bonding materials) for wire mesh assemblies from weft 100 to traditional weft 200 is in the range of 16 %. The specific embodiments of the present invention (for example, construction screen assemblies described herein and having web screen openings 100 through web 200) provide the skin assemblies in the same range having a similar real open screen area. Traditional screens, however, block uniformly quickly which results in the actual opening sieving area being reduced quickly. It is not uncommon for traditional wire screens to lock within the first 24 hours of use to have the actual open sieving area reduced by 50%. Traditional wire assemblies also often fail as a result of the wires being subjected to the vibratory forces that place bending loads on the wires. Injection-molded screen assemblies, according to embodiments of the present invention, in contrast, are not subjected to extensive locking (thereby maintaining a relatively constant real open sieving area) and fail rarely because of structural stability and configuration of the screen assembly, which includes the screen elements and subscreen structures. In fact, screen assemblies according to embodiments of the present invention have extremely long lives and can last for long periods under heavy loading. The screen assemblies according to the present invention have been tested for months under strict conditions with insufficiency or blockage as traditional wire assemblies have been tested under the same conditions and have crashed and failed within days. As discussed more fully in this one, traditional thermoset assemblies cannot be used in such applications.
[0139] [00139] In the embodiments of the present invention, a thermoplastic is used for injection molded fabric elements. As opposed to thermoset polymers, which often include liquid materials that react chemically and cure under temperature, the use of thermoplastics is often simpler and can be provided, for example, by melting a homogeneous material (often in the form of pellets) and then injection molding of the molten material. Not only are the physical properties of thermoplastics optimal for vibrating sieving applications, but the use of thermoplastic liquids provides the easiest manufacturing processes, especially when the micro-molding parts as described here. The use of thermoplastic materials in the present invention provides excellent flexion and fatigue strength in curvature and is ideal for parts subject to intermittent heavy loading or constant heavy loading when found with the vibrating screens used in vibrating screening machines. Because vibrating screening machines are subject to movement, the low friction coefficient of thermoplastic injection molded materials provides optimum wear characteristics. In fact, the wear resistance of certain thermoplastics is superior to many metals. In addition, the use of thermoplastics as described here provides an optimal material when making “quick adjustments” due to their strength characteristics and elongation characteristics. The use of thermoplastics in the embodiments of the present invention also provides resistance to stress cracking, aging and extreme weather. The heat deflection temperature of thermoplastics is in the range of 200 ° F (93.33 ° C). With the addition of glass fibers, it will increase approximately 250 ° F (121.11 ° C) to approximately 300 ° F (148.89 ° C) or greater and increase the stiffness, as measured by the Flexural Module, by approximately 400,000 PSI to approximately 1,000,000 PSI. All of these properties are ideal for the environment found when using vibrating screens on vibrating screening machines under the demand conditions found in the field.
[0140] [00140] Figure 1 illustrates a screen assembly 10 for use with vibrating screening machines. The screen assembly 10 is shown having multiple screen elements 16 (See, for example, Figures 2 and 2A-2D) mounted on the subscreen structures. Subscreen structures include multiple independent subscreen units 14 (See, for example, Figure 3) and multiple independent central subscreen units 18 (See, for example, Figure 4) which are fastened together to form a grid structure having grid openings 50. Each screen element 16 spans four openings 50. Although screen element 16 is shown as a unit comprising four grid openings, screen elements can be supplied in larger or smaller size units . For example, a screen element may be provided having approximately one quarter the size of the screen element 16 such that it should extend over a single grid opening 50. Alternatively, a screen element may be provided having approximately twice the size of the screen element 16 such that it should extend over all eight screen openings of subscreen 14 or 18. Subscreens can also be supplied in different sizes. For example, subscreen units can be provided having two grid openings per unit or a large subscreen can be provided for the total structures, that is, a simple subscreen structure for the total screen assembly. In Figure 1, the multiple independent subscreen 14 and 18 are attached together to form the screen assembly 10. The screen assembly 10 has a continuous screen assembly sieving surface 11 that includes multiple screen element sieving surfaces 13. Each screen element 16 is an injection molded piece of simple thermoplastic.
[0141] [00141] Figure 1A is an enlarged view of a portion of the screen assembly 10 having multi-end subscreen 14 and central subscreen 18. As discussed below, the final subscreen 14 and central subscreen 18 can be attached together to form the assembly. of screen. The screen elements 16 are shown attached to the final subscreens 14 and the central subscreens 18. The size of the screen assembly can be changed by connecting more or less subscreens together to form the screen assembly. When installed on a vibrating screening machine, the material can be fed into a screen assembly 10. See, for example, Figures 12, 12A, 12B, 13, 13A, 14 and 15. Material smaller than the screen openings of the screen element 16, pass through the openings in the screening element 16 and through the grid openings 50 thereby separating the material from that which is too large to pass through the screen openings of the screen elements 16.
[0142] [00142] Figure 1B shows a bottom view of the screen assembly 10 such that the grid openings 50 can be seen below the screen elements. The connecting bars 12 are connected to the sides of the grid structure. The connecting bars 12 can be connected to the interlocking subassemblies creating a grid structure together. The connecting bars 12 may include fasteners that connect to fasteners on side members 38 of subscreen units (14 and 18) or fasteners on base member 64 of pyramidal subscreen units (58 and 60). The connecting bars 12 can be provided to increase the stability of the grid structure and can distribute compression loads if a screen assembly is mounted on a vibratory screening machine using compression, for example, using compression assemblies as described in US Patent No. 7,578,394 and US Patent Application No. 12 / 460,200. The tie bars can also be provided including U-shaped members or a receiving finger opening, for lower or higher tensioning on a vibrating screening machine, for example, see the assembly structures described in US Patent No. 5,332,101 and 6,669,027. The screen elements and sub-screens are securely linked together, as described here, such that, even under tension, the sieving surface of the screen assembly and the screen assembly maintains its structural integrity.
[0143] [00143] The screen assembly shown in Figure 1 is slightly concave, that is, the lower and upper surfaces of the screen assembly have a slight curvature. Sub-screens 14 and 18 are manufactured, such that when they are assembled together, their predetermined curvature is reached. Alternatively, a screen assembly can be flat or convex (see, for example, Figures 19 and 20). As shown in Figures 12, 12A, 13 and 13A, the screen assembly 10 can be installed on a vibrating screening machine having one or more screening surfaces. In one embodiment, the screen assembly 10 can be installed on a vibrating screening machine by placing the screen assembly 10 on the vibrating screening machine such that a contact end of the connecting bars or side members of the screening machine vibrating. The compressive force is then applied to the connecting rod 12. The connecting rods 12 distribute the load of the compressing force to a screen assembly. The screen assembly 10 can be configured, such that it flexes and deforms in a predetermined concave shape when the compression force is applied to the connecting bar 12. The amount of deformation and the concave range can vary according to the use, forced compression applied and shape of the bed support of the vibrating screening machine. Compression of the screen assembly 10 in a concave form when installed on a vibrating screening machine provides many benefits, for example, easy and simple installation and removal, capture and centralization of materials to be screened, etc. Other benefits are listed in U.S. Patent No. 7,578,394. The centralization of the material streams in the screen assembly 10 prevents the material from leaving the screening surface and potentially contaminates previously segregated materials and / or creates maintenance concerns. For larger volumes of material flow, greater compression can be applied to the screen assembly 10, thereby increasing the amount of arc in the screen assembly 10. The greater the amount of arc in the screen assembly 10, the greater the material retention by screen assembly 10 and prevention of material spillage outside the edges of screen assembly 10. Screen assembly 10 can also be configured to deform into a convex shape under compression or remains substantially flat under compression or locking. The incorporation of the connecting bars 12 in the screen assembly 10 allows a compression load from the vibrating sieving machine to be distributed through a screen assembly 10. The screen assembly 10 can include guide notches in the connection bars 12 for help guide the screen assembly 10 in place when installed on the vibrating screening machine having guides. Alternatively, the screen assembly can be installed on the vibrating screening machine without connecting bars 12. In the alternative embodiment, the guide notches can be included in subscreen units. US patent application No. 12 / 460,200 is incorporated herein by reference and any embodiments disclosed herein can be incorporated into the embodiments of the present invention described here.
[0144] [00144] Figure 2 shows a screen element 16 having substantially parallel screen element portions 20 and substantially parallel screen element side portions 22 which are substantially perpendicular to the final screen element portions 20. The surface screen element Sieve 13 includes surface elements 84 which operate parallel to the final portions of screen element 20 and which form sieve openings 86. See Figure 2D. The surface elements 84 have a thickness T, which can vary depending on the sieving application and the configuration of the sieve openings 86. T can be, for example, from approximately 43 microns to approximately 100 microns depending on the desired open sieving area and the width of the W of screening apertures 86. The screening apertures 86 are elongated slits having a length of L and a width of W, which can be varied by a chosen configuration. The width can be a distance of approximately 43 microns to approximately 2000 microns between the inner surfaces of each screen surface element 84. The sieve openings are not required to be rectangular but can be molded by injection of thermoplastic in any shape suitable for a particular assessment application, which includes approximately square, circular and / or oval. For increased stability, the web surface elements 84 can include integral fiber materials that can function substantially parallel to the end portions 20. The fiber can be an aramid fiber (or individual filaments thereof), a naturally occurring fiber or other material having a relatively high tensile strength. U. S. Patent No. 4,819,809 and U. S. Patent Application No. 12 / 763,046 are hereby incorporated by reference and, where appropriate, the embodiments disclosed herein may be incorporated into the screen assemblies disclosed here.
[0145] [00145] The screen element 16 can include connection openings 24 configured such that the elongated connection members 44 of a sub-screen can pass through the connection openings 24. The connection openings 24 can include a tapered hole that can be filled when a portion of the elongated connecting member 44 above the sieving surface of the sieving element is cast by attaching the screen element 16 to the subscreen. Alternatively, the connection openings 24 can be configured without a tapered hole allowing a bead to form on the sieving surface of the sieving element when a portion of an elongated connecting member 44 above the sieving surface of the sieving element the screen element to the subscreen. The screen element 16 can be a simple thermoplastic injection molded part. Screen element 16 can also be multiple thermoplastic injection molded parts, each configured to extend over one or more grid openings. Using small thermoplastic injection molded screen elements 16, which are connected to a grid structure as described here, provides substantial advantages over previous screen assemblies. The injection molding of thermoplastic mesh elements 16 allows the screening apertures 86 to have widths W as small as approximately 43 microns. This allows for accurate and effective assessment. The arrangement of the screen elements 16 on the sub-screens, which can also be molded by injection of thermoplastic, allows the easy construction of complete evaluation assemblies with very fine sieving openings. The arrangement of the screen elements 16 on the sub-screens also allows for substantial variations in overall size and / or configuration of the screen assembly 10, which can be varied including more or less sub-screens or sub-screens having different shapes. In addition, a screen assembly can be constructed having a variety of sieving aperture sizes or a gradient of sieving aperture sizes simply by incorporating screen elements 16 with the different sized sieving apertures in the subscreen and joining the subscreen desired configuration.
[0146] [00146] Figure 2B and Figure 2C show a bottom part of the screen element 16 having a screen element support member 28 that extends between the end portions 20 and being substantially perpendicular to the end portions 20. FIG 2B also shows a second screen element support member 30 orthogonal to the screen element support member 28 which extends between the side edge portions 22 being approximately parallel to the end portions 20 and substantially perpendicular to the side portions 22. The screen element is still may include a first series of reinforcement members 32 substantially parallel to the side edge portions 22 and a second series of reinforcement members 34 substantially parallel to the end portions 20. The end portions 20, the side edge portions 22, the support member of screen element 28, the second screen element support member 30, the first series of reinforcement members 32, and the second series of reinforcement members 34 which structurally stabilize the web surface elements 84 and sieve openings 86 during different loads, which includes distribution of a compressive force and / or vibratory loading conditions.
[0147] [00147] Figure 3 and Figure 3A illustrate an end subscreen unit 14. The end subscreen unit 14 includes parallel end subscreen members 36 and side parallel subscreen members 38 substantially perpendicular to the subscreen end members 36. The end subscreen 14 has fasteners along a end member of subscreen 36 and along side members of subscreen 38. The fasteners can be clamps 42 and clip openings 40 such that the multiple subscreen units 14 can be securely fastened together. A subscreen unit can be attached together with its respective side members 38 passing the clip 42 into the clip opening 40 until the extended members of the clip 42 extend beyond the opening of the clip 40 and the side member of the subscreen 38. When the clip 42 is pushed into the staple opening 40, the staple extending members will be forced together until a stapling portion of each extended member is beyond a subscreen side member 38 allowing the stapling portions to fit into an inner portion of the subscreen side member 38. When the staple portions are fitted into the staple opening, side subscreen members of two independent subscreens will be side by side and secured together. The sub-screens can be separated by applying force to the extended members of the clamps such that the extended members are moved together allowing the stapling portions to pass through the opening of the clamp. Alternatively, clamps 42 and clamp openings 40 can be used to secure the end member of subscreen 36 to an end member of another subscreen, such as a central subscreen (Fig. 4). The final subscreen can have a final member of subscreen 36 that does not have any fasteners. Although the fasteners shown in the drawings are staples and staple openings, alternative fasteners and alternative shapes of staples and openings can be used, which includes other mechanical arrangements, adhesives, etc.
[0148] [00148] Constructing the grid structure from the sub-screens, which can be substantially rigid, creates a strong and durable grid structure and screen assembly 10. The screen assembly 10 is constructed so that it can withstand heavy loading without damage the sieving surface and support structure. For example, the pyramid-shaped grid structures shown in Figures 22 and 23 provide a very strong pyramidal base structure that supports individual screen elements capable of very fine sieving, having sieve openings as small as 43 microns. Unlike the pyramid screen assembly embodiment of the present invention described here, existing wire mesh screen assemblies of the existing corrugated or pyramid type are highly susceptible to damage and / or deformation under heavy loading. In this way, the different current screens, the present invention provides screen assemblies having very small and very precise screening openings as long as structural stability and resistance to substantial damage are provided, thereby maintaining the screening accuracy under a variety of weights. charge. The construction of the grid structure of the sub-screens also allows for substantial variation in the size, shape and / or configuration of the screen assembly by simply changing the number and type of the sub-screens used to build the grid structure.
[0149] [00149] The final subscreen unit 14 includes a first subscreen support member 46 which operates parallel to the subscreen side members 38 and a second subscreen support member 48 orthogonal to the first subscreen support member 46 and perpendicular to the subscreen side members 38. The elongated connection members 44 can be configured such that they match the screen element connection openings 24. The screen element 16 can be attached to the subscreen 14 by joining the elongated connection members 44 with screen element connection openings 24. A portion of the elongate connection member 44 may extend slightly above the screen element sifting surface when the screen element 16 is connected to a final subscreen 14. The connection openings of screen element 24 may include a tapered bore such that a portion of the elongated connecting members 44 extending above the screen element sieving surface can be funneled and fill the tapered hole. Alternatively, the screen element connection openings 24 may not have a tapered hole and the portion of the elongated connection members that extend above the screen surface of the screen element 16 can be configured to form a bead on the screen surface when cast. See Figures 34 and 35. Once connected, the screen element 16 will extend through at least one grid opening 50. Materials that pass through the sieve openings 86 will pass through the grid opening 50. The arrangement of the screening members elongated connections 44 and the corresponding arrangement of the screen element connection openings 24 provide a guide for the connection of screen elements 16 to the sub-screens simplifies the assembly of the sub-screens. The elongated connecting members 44 pass through the screen element connection openings 24 that guide the screen element in the correct placement on the subscreen surface. The connection by means of the elongated connection members 44 and the screen element connection openings 24 still provides a secure connection to the sub-screen and strengthens the sieving surface of the screen assembly 10.
[0150] [00150] Figure 4 shows a central subscreen 18. As shown in Figure 1 and Figure 1A, the central subscreen 18 can be incorporated into a screen assembly. The central subscreen 18 has staples 42 and staple openings 40 on both members of the subscreen frame 36. The final subscreen 14 has staples 42 and staple openings 40 on only one of the two subscreen side members 36. The central subscreen 18 can be attached to other subscreens in each of its end subscreen members and lateral subscreen members.
[0151] [00151] Figure 5 shows a top view of the tie bar 12. Figure 5A shows a bottom view of the tie bar 12. The tie bars 12 include clamps 42 and clip openings 40 such that the tie bar 12 can be stapled to one side of a screen panel assembly (see Figure 9). Like subscreens, the fasteners on the connecting bar 12 are shown as staples and staple openings, but other fasteners can be used to fit the subscreen fasteners. The levers can be connected to the connecting bars 12 (see, for example, Figure 7) which can simplify the transport and installation of a screen assembly. Labels and / or labels can also be attached to the tie bars. As discussed above, the connecting bars 12 can increase the stability of a grid structure and can distribute the compression loads of a vibrating screen machine if the screen assembly is placed under compression as shown in US Patent No. 7,578,394 and Order US Patent No. 12 / 460,200.
[0152] [00152] Screening members, screening assemblies and parts thereof, which include connecting members / fasteners as described here, may include nanomaterial dispersed in it for improved strength, durability and other benefits associated with the use of a particular nanomaterial or combination different nanomaterials. Any nanomaterial can be used, which includes, but is not limited to, nanotubes, nanofibers and / or elastomeric nanocomposites. The nanomaterial can be dispersed in the screening members and screening assemblies and parts of them in varying percentages, depending on the desired properties of the final product. For example, specific percentages can be incorporated to increase the strength of the limb or to make the wear resistant sieving surface. The use of a thermoplastic injection molded material having nanomaterials dispersed here can provide increased strength while using less material. In this way, the structural members include subscreen frame support members and screen element support members that may be smaller and stronger and / or lighter. This is particularly beneficial when manufacturing relatively small individual components that are built into a complete screen assembly. Also, instead of producing individual subscreens that stick together, a large grid structure having nanomaterials dispersed in it, can be manufactured by being relatively light and strong. The individual screen elements, with or without nanomaterials, can then be linked to the simple complete grid structure. The use of nanomaterials in a screen element will provide increased strength while reducing the element's weight and size. This can be especially useful when the injection molding of screen elements having extremely small openings when the openings are supported by the surrounding materials / members. Another advantage of incorporating nanomaterials into the screen elements is an improved sieving surface that is durable and wear-resistant. Screen surfaces tend to wear through heavy use and exposure to abrasive materials and use of a thermoplastic and / or a thermoplastic having abrasive resistant nanomaterials, provides a sieving surface with a long life.
[0153] [00153] Figure 6 shows a subassembly 15 of a series of subscreen units. Figure 6A is an exploded view of the subassembly of Figure 6 showing the individual subscreens and the direction of connection to each other. The subassembly includes two final subscreen units 14 and three central subscreen units 18. The final subscreen units 14 were the ends of the subassembly while the central subscreen units 18 are used to join the two final subscreen units 14 via connections between staples 42 and staple openings 40. A subscreen unit shown in Figure 6 is shown with the screen elements connected 16. By fabricating the screen assembly from the subscreens and in the subassembly, each subscreen can be built in a chosen specification and the screen assembly can be constructed from multiple subscreens in a configuration required for the screening application. The screen assembly can be assembled quickly and simply and will have precise screening capabilities and substantial stability under load pressures. Because of the configuration of the grid structure and screen elements 16, the configuration of the multiple individual screen elements that form the sieving surface of the screen assembly 10 and the fact that the screen elements 16 are injection molded from thermoplastic, the openings in the screen elements 16 are relatively stable and maintain their opening sizes for optimal screening under various loading conditions, which include compression loads and deflections and concavity tensioning.
[0154] [00154] Figure 7 shows a screen assembly 10 with connection bars 12 having levers connected to connection bars 12. The screen assembly is made up of multiple subscreen units attached to each other. A subscreen unit has screen elements 16 attached to its upper surface. Figure 7A is a cross section of Section A-A of Figure 7 showing individual subscreens attached to the screen elements that form the screening surface. As reflected in Figure 7A, the subscreens can have subscreen support members 48 configured such that the screen assembly is slightly concave in shape when a subscreen support member 48 is attached to each other via clamps 42 and clamp openings 40. Because the screen assembly is constructed with a slightly concave shape with a slightly concave shape they can be configured to deform to a desired hollow when applying a compression load without having to guide the screen assembly in a concave shape. Alternatively, subscreens can be configured to create a slightly convex screen assembly or a substantially flat screen assembly.
[0155] [00155] Figure 8 is a top isometric view of a screen assembly partially covered by screen elements 16. This figure shows final subscreen units 14 and central subscreen units 18 attached to form a screen assembly. The sieving surface can be completed by connecting screen elements 16 to the uncovered subscreen units shown in the Figure. The screen elements 16 can be connected before the construction of a grid structure or connected to the sub-screens after the sub-screens are attached to each other in a grid structure.
[0156] [00156] Figure 9 is an exploded isometric view of the screen assembly shown in Figure 1. These figures show eleven subassemblies being secured to each other by means of clamps and clamp openings along the subscreen end members of subscreen units in each subassembly. Each subassembly has two final subscreen units 14 and three central subscreen units 18. Link bars 12 are stapled on each side of the assembly. Screen assemblies of different sizes can be created using different numbers of subassemblies or different numbers of central subscreens in each subassembly. An assembled screen assembly has a continuous screen assembly screen surface made of multiple screen element screen surfaces.
[0157] [00157] Figures 10 and 10A illustrate the connection of screen elements 16 to the final subscreen unit 14, according to an exemplary embodiment of the present invention. The web elements 16 can be aligned with the final subscreen unit 14 via the elongated link members 44 and the web element link openings 24 such that the elongated link members 44 pass through the link element openings. screen 24 and extend slightly beyond the screen element sieving surface. The elongated connecting members 44 can be fused to fill the tapered holes of the screen element connection openings 24 or, alternatively, to form beads on the screen element sieving surface, securing the screen element 16 to the subscreen unit 14 The connection by means of the elongated connection members 44 and the mesh element connection openings 24 is only one embodiment of the present invention. Alternatively, the screen element 16 can be attached to the final subscreen unit 14 by means of adhesive, fasteners and fastener openings, etc. Although shown to have two screen elements for each subscreen, the present invention includes alternative configurations of one screen element per subscreen, multiple screen elements per subscreen, a screen element by sub-screen opening or having a simple screen element covering the multiple subscreens. The final subscreen 14 can be substantially rigid and can be formed as a simple thermoplastic injection molded part.
[0158] [00158] Figure 10B is a top view of a final subscreen unit shown in Figure 10A with screen elements 16 attached to the final subscreen. Figure 10C is an enlarged cross section of Section B-B of a final subscreen unit in Figure 10B. The screen element 16 is placed in the final subscreen unit such that the elongated connection member 44 passes through the connection opening and beyond the screen element sieving surface. The portion of the elongated connecting member 44 that passes through the connecting opening and beyond the screen element sieve surface can be fused to connect the screen element 16 to the final subscreen unit as described above.
[0159] [00159] Figure 11 and Figure 11A illustrate the connection of screen elements 16 to the central subscreen unit 18, according to an exemplary embodiment of the present invention. The web elements 16 can be aligned with a central subscreen unit 18 via the elongated link members 44 and the web element link openings 24 such that the elongated link members 44 pass through the link element openings. screen 24 and extend slightly beyond the screen element sieving surface. The elongated connecting members 44 can be fused to fill the tapered holes of the screen element connection openings 24 or, alternatively, to form beads on the screen element sieving surface, securing the screen element 16 to the central subscreen unit 18. Connection by means of the elongated connecting members 44 and the web element connection openings 24 is only one embodiment of the present invention. Alternatively, screen element 16 can be attached to the central subscreen unit 14 by means of adhesive, fasteners and fastener openings, etc. Although shown to have two screen elements for each subscreen, the present invention includes alternate configurations of one screen element per subscreen, one screen element per subscreen opening, multiple screen elements per subscreen or having a single screen element cover units of multiple subscreen. A central subscreen unit 18 may be substantially rigid and may be a simple thermoplastic injection molded part.
[0160] [00160] Figures 12 and 12A show screen assemblies 10 installed in a vibrating screening machine having two screening surfaces. The vibrating screening machine may have compression assemblies on the side members of the vibrating screening machine, as shown in U. S. Patent No. 7,578,394. The compressive force can be applied to a tie bar or a side member of the screen assembly such that the screen assembly deviates downward in a concave shape. A bottom side of the screen assembly can be joined with a screen mounting joint surface of the vibrating screening machine as shown in U. S. Patent No. 7,578,394 and U. S. Patent Application No. 12 / 460,200. The vibrating screening machine may include a central wall member configured to receive a connecting bar from a side member of the screen assembly opposite the side member of the screen assembly receiving compression. The central wall member can be angled, such that a compressive force against the screen assembly deflects the screen assembly downwards. The screen assembly can be installed on a vibrating screening machine such that it is configured to receive the material for evaluation. The screen assembly may include guide notches configured to mate with the guides of the vibrating screen machine such that the screen assembly can be guided in place during installation and may include the guide assembly configurations as shown in the US Patent Application No. 12 / 460,200.
[0161] [00161] Figure 12B is a front view of the vibrating screening machine shown in Figure 12. Figure 12B shows screen assemblies 10 installed on the vibrating screening machine with compression applied to deflect the screen assemblies downward in a concave shape. Alternatively, the screen assembly can be preformed in a predetermined concave shape without compressive force.
[0162] [00162] Figures 13 and 13A show screen mounting installations 10 on a vibrating screening machine having a simple screening surface. The vibrating screening machine may have a compression assembly with a side member of the vibrating screening machine. The screen assembly 10 can be placed on a vibrating screening machine as shown. A compressive force can be applied to a tie bar or side member of the screen assembly such that the screen assembly deviates downward in a concave shape. A bottom side of the screen assembly can be joined with a screen mounting joint surface of the vibrating screening machine as shown in U. S. Patent No. 7,578,394 and U. S. Patent Application No. 12 / 460,200. The vibrating screening machine can include a side member wall opposite the compression assembly configured to receive a tie bar or a side member of the screen assembly. The side member wall can be angled such that a compressive force against the screen assembly deflects the screen assembly downwards. The screen assembly can be installed on a vibrating screening machine such that it is configured to receive material for screening. The screen assembly may include guide notches configured to mate with the guides of the vibrating screen machine such that the screen assembly can be guided in place during installation.
[0163] [00163] Figure 14 is a front view of the screen assemblies 52 installed in the vibrating screening machine having two screening surfaces, according to an exemplary embodiment of the present invention. The screen assembly 52 is an alternative embodiment where the screen assembly has been preformed to adapt to the vibrating screen machine without applying a load to the screen assembly, i.e., the screen assembly 52 includes a lower portion 52A that is formed, such that it joins with the bed 83 of the vibrating screening machine. The lower portion 52A can be integrally formed with the screen assembly 52 or it can be a separate part. The screen assembly 52 includes similar features as the screen assembly 10, which includes sub-screens and screen elements, but also includes the lower portion 52A which allows it to adapt to the bed 83 without being compressed into a concave shape. The sieving surface of the screen assembly 52 can be substantially flat, concave or convex. The screen assembly 52 can be held in place by applying a compressive force to a side member of the screen assembly 52. A lower portion of the screen assembly 52 can be preformed to bond with any type of surface. joining a vibrating screening machine.
[0164] [00164] Figure 15 is a front view of the screen assembly 53 installed on the vibrating screening machine having a simple screening surface, according to an exemplary embodiment of the present invention. The screen assembly 53 has similar characteristics to the screen assembly 52 described above, which includes a lower portion 53A that is formed such that it joins with a bed 87 of the vibrating screen machine.
[0165] [00165] Figure 16 shows a final support structure subassembly and Figure 16A shows an exploded view of the final support structure subassembly shown in Figure 16. The final support structure subassembly shown in Figure 16 incorporates eleven subscreen units Final 14. Alternative configurations having more or less final subscreen units can be used. The final subscreen units 14 are secured to each other by means of clamps 42 and clamp openings 40 along the side members of a final subscreen unit 14. Figure 16A shows the connection of individual final subscreen units such that the subassembly support structure is created. As shown, the sub-assembly of the final support structure is covered in the screen elements 16. Alternatively, the sub-assembly of the final support structure can be constructed from sub-screens before the connection of the screen elements u partially from the pre-covered sub-units and partially from unscreened subscreen units.
[0166] [00166] Figure 17 shows a central support structure assembly and Figure 17A shows an exploded view of the central support structure subassembly shown in Figure 17. The central support structure assembly shown in Figure 17 incorporates eleven subscreen units 18. Alternative configurations having more or less central subscreen units can be used. The subscreen center units 18 are fastened to each other by means of clamps 42 and clamp openings 40 along the side members of central subscreen units 18. Figure 17A shows the connection of individual central subscreen units such that the subassembly of the central support structure is created. As shown, the subassembly of the central support structure is covered in the screen elements 16. Alternatively, the subassembly of the central support structure can be constructed from central sub-screens before the connection of the screen elements or partially from the pre-subscreen units covered and partially from unscreened subscreen units.
[0167] [00167] Figure 18 shows an exploded view of a screen assembly having three central support structure subassemblies and two final support structure subassemblies. The support structure assemblies are attached to each other by means of the clamps 42 and clamp openings 40 in the end subscreen members. Each central subscreen unit is connected to two other subscreen units via the end members. The end members 36 of the end subscreen units having no clips 42 or clip openings 40 form the end edges of the screen assembly. The screen assembly can be done with more or less central support structure subassemblies or larger or smaller structure subassemblies. Link bars can be added to the side edges of the screen assembly. As shown, the screen assembly has screen elements installed in a subscreen unit prior to assembly. Alternatively, the screen elements 16 can be installed after all or a portion of the assembly.
[0168] [00168] Figure 19 illustrates an alternative embodiment of the present disclosure where the screen assembly 54 is substantially flat. The screen assembly 54 can be flexible such that it can be deformed into a concave or convex shape or can be substantially rigid. Screen assembly 54 can be used with a flat sieving surface. See Figure 39. As shown, the screen assembly 54 has connecting bars 12 connected to the side portions of the screen assembly 54. The screen assembly 54 can be configured with the various embodiments of the grid structures and screen elements described here.
[0169] [00169] Figure 20 illustrates an alternative embodiment of the present disclosure in which the screen assembly 56 is convex. The screen assembly 56 can be flexible such that it can be deformed to a more convex shape or can be substantially rigid. As shown, the screen assembly 56 has connecting bars 12 attached to the side portions of the screen assembly. The screen assembly 56 can be configured with the various embodiments of the grid structures and screen elements described here.
[0170] [00170] Figures 21 and 21A show an alternative embodiment of the present disclosure that incorporates pyramid shaped subscreen units. A screen assembly is shown with connecting bars 12 attached. The screen assembly incorporates central and end subscreen units 14 and 18 and central and end subscreen units in a pyramidal shape 58 and 60. Incorporating the pyramidal subscreen units 58 and 60 in a screen assembly, an increased sieving surface can be achieved. In addition, the material being sieved can be controlled and directed. The screen assembly can be concave, convex or flat. The screen assembly can be flexible and can be deformed into a concave or convex shape by applying a compressive force. The screen assembly may include guide notches capable of joining with the guide joining surfaces on the vibrating screen machine. The different configurations of the subscreen units and pyramidal subscreen units can be used, which can increase or decrease an amount of sieving surface area and the flow characteristics of the material being processed. Unlike weft screens or similar technology, which can incorporate folds or other manipulations to increase the surface area, the screen assembly shown is supported by a grid structure, which can be substantially rigid and able to withstand substantial loads without damage or destruction. Under heavy material flows, traditional screen assemblies with folded sieving surfaces are often leveled or damaged by the weight of the material, thereby impacting the performance and reducing the sieving surface area of such screen assemblies. The screen assemblies disclosed here are difficult to damage because of the strength of the grid structure and the benefits of the increased surface area provided by the incorporation of pyramid shaped subscreens can be maintained under substantial loads.
[0171] [00171] A final pyramid-shaped subscreen 58 is illustrated in Figure 22 and Figure 22A. Final pyramid-shaped subgrade 58 includes a first and a second grid structure that forms the first and second inclined surface grid openings 74. The final pyramid-shaped subgrade 58 includes a groove portion 66, subscreen / limb side members base 64 and first and second angular surfaces 70 and 72, respectively, the peak in the groove portion 66 and extending downwardly to the lateral member 64. The pyramidal subscreen 58 and 60 have pyramidal end members 62 and members triangular median support brackets 76. The angles shown for the first and second angled surfaces 70 and 72 are exemplary only. Different angles can be used to increase or decrease the sieving surface area. The final pyramid shaped subscreen 58 has fasteners along the side members 64 and at least one triangular end member 62. The fasteners can be staples 42 and staple openings 40 such that the multiple subscreen units 58 can be fastened together. Alternatively, clamps 42 and clamp openings 40 can be used to attach the final subscreen in a pyramid shape 58 to the final subscreen 14, central subscreen 18 or central subscreen in a pyramid shape 60. The elongated connecting members 44 can be configured in the first and second inclined surfaces 70 and 72 such that they match the mesh element connection openings 24. The mesh element 16 can be attached to the final substructure in a pyramid shape 58 by joining the elongated connecting members 44 with the mesh openings. screen element connection 24. A portion of the elongated connection member 44 may extend slightly above the screen element sifting surface when the screen element 16 is connected to the final pyramid-shaped subscreen 58. The connection openings of screen member 24 may include a tapered bore such that a portion of the elongate connecting members 44 extends above the screen element sieve surface that can be cast and fill the tapered hole. Alternatively, the web element connection openings 24 may not have a tapered hole and the portion of the elongated connection members that extend above the screen surface of the screen element 16 may be fused to form a bead on the screen surface. Once connected, the screen element 16 can extend over the first 74 and the second slanted grid openings. The materials that pass through the sieve openings 86 will pass through the first 74 and second grid openings.
[0172] [00172] The central pyramid shaped subscreen 60 is illustrated in Figure 23 and Figure 23A. The central pyramid-shaped subscreen 60 includes a first and a second grid structure that forms the first and second inclined surface grid openings74. The central pyramid shaped subscreen 60 includes a groove portion 66, a lateral subscreen member / base member 64 and first and second angular surfaces 70 and 72 that reach the maximum point of groove 66 and extends downwardly to the member lateral 64. The central pyramidal subscreen 60 has pyramidal end members 62 and median triangular members 76. The angles shown for the first and second angular surfaces 70 and 72 are exemplary only. Different angles can be used to increase or decrease the sieving surface area. The central pyramid shaped subscreen 60 has fasteners along the side members 64 and both triangular end members 62. The fasteners can be staples 42 and staple openings 40 such that the multiple pyramid-shaped central subscreen 60 can be fastened together. Alternatively, the clamps 42 and clamp openings 40 can be used to attach the pyramid-shaped central sub-screen 60 to the final sub-screen 14, central sub-screen 18 or the pyramid-shaped final sub-screen 58. The elongated connecting members 44 can be configured in the first and second inclined surfaces 70 and 72, such that they match the screen element connection openings 24. The screen element 16 can be attached to the central substructure in a pyramid shape 60 by means of the elongated connection members 44 with the connection openings of screen element 24. A portion of the elongate connecting member 44 may extend slightly above the screen element sifting surface when the screen element 16 is connected to the central substructure in a pyramid shape 60. The element connection openings web 24 may include a tapered bore such that the portion of the elongated connecting members 44 extends above the screen element sievable surface which can be fused and filled her the tapered hole. Alternatively, the web element connection openings 24 may not have a tapered hole and the portion of the elongated connection members that extend above the screen surface of the screen element 16 may be fused to form a bead on the screen surface. Once connected, the screen element 16 will extend over the inclined grid opening 74. The materials that pass through the sieve openings 86 will pass through the grid opening 74. While the pyramid or flat grid structures are shown, it will be estimated that several formed sub-screens and the corresponding screen elements can be manufactured in accordance with the present disclosure.
[0173] [00173] Figure 24 shows a subassembly of a series of pyramid-shaped subscreen units. Figure 24A is an exploded view of the subassembly in Figure 24 showing the individual sub-screens in a pyramid shape and connection direction. The subassembly its final pyramid-shaped subscreen 58 and three central pyramid-shaped subscreen 60. The final pyramid-shaped subscreen 58 forms the ends of the subassembly while the central pyramid-shaped subscreen 60 is used to join the two final subscreen 58 through the connections between clamps 42 and clamp openings 40. The pyramidal subscreens shown in Figure 24 are shown with screen elements 16 connected. Alternatively, the subassembly can be built from sub-screens before connecting the screen elements or partially from pre-covered pyramid-shaped subscreen units and partially from non-covered pyramid-shaped subscreen units.
[0174] [00174] Figures 24B and 24C illustrate the connection of screen elements 16 to the final pyramid-shaped subscreen 58, according to an exemplary embodiment of the present invention. The web elements 16 can be aligned with a pyramid-shaped end sub-screen 58 via elongated link members 44 and the web element link openings 24 such that the elongated link members 44 pass through the web element link openings 24 may extend slightly beyond the screen element sieving surface. The portion of the elongated connecting members 44 extending beyond the screen element to the sieving surface can be fused to fill the tapered holes of the screen element connection openings 24 or, alternatively, to form beads on the screen element sieving surface. web, attaching the web element 16 to the pyramid-shaped subscreen 58. The connection via the elongated link members 44 and the web element link openings 24 are just one embodiment of the present invention. Alternatively, screen element 16 can be attached to the final subscreen in a pyramid shape 58 by means of adhesive, fasteners and fastener openings, etc. Although shown to have four screen elements for each end pyramid-shaped subscreen 58, the present invention includes alternative configurations of two screen elements per end pyramid-shaped subscreen 58, multiple screen elements per end pyramid-shaped subscreen 58 or having one element single screen covering an inclined surface of multiple pyramid shaped subscreen units. The final pyramid-shaped subscreen 58 may be substantially rigid and may be a simple thermoplastic injection molded part.
[0175] [00175] Figures 24D and 24E illustrate the connection of the screen elements 16 to the central pyramidal subscreen 60, according to an exemplary embodiment of the present invention. The web elements 16 can be aligned with a central pyramid-shaped sub-screen 60 via the elongated connection members 44 and the web element connection openings 24 such that the elongated connection members 44 can pass through the web element connection openings. screen 24 and may extend slightly beyond the screen element sieving surface. The portion of the elongated connecting members 44 extends beyond the screen element to the sieving surface and can be fused to fill the tapered holes of the screen element connection openings 24 or, alternatively, to form beads on the screen element surface mesh, the mesh element 16 securing the pyramid-shaped subscreen unit 60. Connection by means of the elongated connecting members 44 and mesh element connection openings 24 is only one embodiment of the present invention. Alternatively, the screen element 16 can be attached to the central sub-screen in a pyramid shape 60 by means of adhesive, fasteners and fastener openings, etc. Although shown to have four screen elements for each pyramid-shaped central sub-screen 60, the present invention includes alternating configurations of two screen elements by the pyramid-shaped central sub-screen 60, multiple screen elements by the pyramid-shaped central sub-screen 60, or having one single screen element covers an inclined surface of the multiple pyramidal sub-screens. The central pyramid shaped subscreen 60 can be substantially rigid and can be a simple thermoplastic injection molded part. While grid structures of flat and pyramidal shapes are shown, it will also be appreciated that various sub-screens formed and corresponding screen elements can be manufactured in accordance with the present disclosure.
[0176] [00176] Figure 25 is a top view of a screen assembly 80 having pyramid shaped subscreens. As shown, the screen assembly 80 is formed from the screen subassemblies connected to each other, alternating from flat subassemblies to pyramidal subassemblies. Alternatively, pyramidal-shaped subassemblies can be linked to each other or less or more pyramidal-shaped subassemblies can be used. Figure 25A is a cross section of the CC section of the screen assembly shown in Figure 25. As shown, the screen assembly has five series of pyramid-shaped subscreen units and six series of flat subscreen, with the series of subscreen units between each series of pyramidal subscreens. The connecting bars 12 are connected to a screen assembly. Any combination of the flat subscreen series and pyramidal subscreen series can be used. Figure 25B is a broader view of the cross section shown in Figure 25A. In Figure 25B, the connection of each subscreen to another subscreen and / or connecting bar 12 is visible through clamps and clamp openings.
[0177] [00177] Figure 26 is an exploded isometric view of a screen assembly having pyramid shaped subscreen units. This Figure allows eleven subassemblies being secured to each other by means of clamps and clamp openings together with the subscreen side members of the subscreen units in each subassembly. Each flat subassembly has two end sub-screens 14 and three central sub-screens 18. Each pyramid-shaped subassembly has two end pyramid-shaped sub-screens 58 and three central pyramid-shaped sub-screens 60. Connecting bars 12 are attached at each end of the assembly. Different sized screen assemblies can be created using different subassembly numbers or different numbers for the central subscreen units. The sieving surface area can be increased by incorporating more pyramidal subassemblies or decreased by incorporating more flat assemblies. An assembled screen assembly has a continuous screen assembly screen surface made from the multiple screen element screen surfaces.
[0178] [00178] Figure 27 shows installation of screen assemblies 80 on the vibrating screening machine having two screening surfaces. Figure 30 is a front view of the vibrating machine shown in Figure 27. The vibrating screening machine can have compression assemblies on the side members of the vibrating screening machine. Screen mounts can be placed on the vibrating screen machine as shown. A compressive force can be applied to a side member of the screen assembly such that the screen assembly deviates downward in a concave shape. A bottom side of the screen assembly can be joined with a screen mounting joint surface of the vibrating screening machine as shown in U. S. Patent No. 7,578,394 and U. S. Patent Application No. 12 / 460,200. The vibrating screening machine may include a central wall member configured to receive a side member of the screen assembly opposite the side member of the screen assembly receiving compression. The cell wall member can be angled such that the compressive force against the screen assembly deflects the screen assembly downwards. The screen assembly can be installed on the vibrating screening machine such that it is configured to receive the material for screening. The screen assembly may include grid notches configured to mate with vibrating screen machine grids such that the screen assembly can be guided in place during installation.
[0179] [00179] Figure 28 shows an isometric view of a screen assembly having pyramid shaped subscreens where the screen elements have not been connected. The screen assembly shown in Figure 28 is slowly concave, however, the screen assembly can be more concave, convex or flat. The screen assembly can be made from multiple subassemblies, which can be in any combination of flat subassemblies and pyramidal subassemblies. As shown, eleven subassemblies are included, however, more or less subassemblies can be included. The screen assembly is shown without the screen elements 16. The subscreens can be assembled together before or after the connection of the screen elements to subscreens or any combination of the subscreens having connected screen elements and subscreens without the screen elements can be attached together. Figure 29 shows a screen assembly of Figure 28 partially coated on the screen elements. Pyramid-shaped subassemblies include end pyramid-shaped sub-screens 58 and central pyramid-shaped sub-screens 60. Flat subassemblies include flat end sub-screens 14 and central flat sub-screens 18. One subscreen unit can be attached to each other via clamps and openings staple.
[0180] [00180] Figure 31 shows installation of the screen assembly 81 on a vibrating screening machine having a simple screening surface, according to an exemplary embodiment of the present invention. Screen mount 81 is similar in configuration to screen mount 80, but includes additional flat and pyramidal mounts. The vibrating screening machine may have a compression assembly on a side member of the vibrating screening machine. Screen assembly 81 can be placed on the vibrating screening machine as shown. A compressive force can be applied to a side member of the screen assembly 81 such that the screen assembly 81 deviates downward in a concave shape. A bottom side of the screen assembly may join with a screen mounting joint surface of the vibrating screening machine as shown in U. S. Patent No. 7,578,394 and U. S. Patent Application No. 12 / 460,200. The vibrating screening machine may include a side wall member opposite the compression assembly configured to receive a side member of the screen assembly. The side wall member can be angled such that the compressive force against the screen assembly deflects the screen assembly downwards. The screen assembly can be installed on the vibrating screening machine such that it is configured to receive the material for screening. The screen assembly may include grid notches configured to mate with the guides of the vibrating screen machine such that the screen assembly can be guided in place during installation.
[0181] [00181] Figure 32 is a front view of the screen assemblies 82 installed in the vibrating screening machine having two screening surfaces, according to an exemplary embodiment of the present invention. The screen assembly 82 is an alternate embodiment where the screen assembly has been preformed to fit on the vibrating screen machine without applying the load to a screen assembly, that is, screen assembly 82 includes a lower portion 82A that it is formed such that it joins with a bed 83 of the vibrating screening machine. The lower portion 82A can be integrally formed with the screen assembly 82 or it can be a separate part. The screen assembly 82 includes similar features as the screen assembly 80, which includes sub-screens and screen elements, but also includes a lower portion 82A that allows adjustment on the bed 83 without being compressed into a concave shape. The screen surface of the screen assembly 82 can be substantially flat, concave or complex. The screen assembly 82 can be held in place by applying compressive force to a side member of the screen assembly 82 or it can simply be held in place. A lower portion of the screen assembly 82 can be preformed to join with any type of joining surface of a vibrating screening machine.
[0182] [00182] Figure 33 is a front view of the screen assembly 85 installed in the vibrating screening machine having a simple screening surface, according to an exemplary embodiment of the present invention. The screen assembly 85 is an alternate embodiment where the screen assembly has been preformed to fit on the vibrating screen machine without applying the load to a screen assembly, that is, screen assembly 85 includes the lower portion 85A which it is formed such that it joins with a bed 87 of the vibrating screening machine. The lower portion 85A can be integrally formed with the screen assembly 85 or it can be a separate part. The screen assembly 85 includes similar features as the screen assembly 80, which includes sub-screens and screen elements, but also includes a lower portion 85A that allows it to fit in bed 87 without being compressed into a concave shape. The sieving surface of the screen assembly 85 can be substantially flat, concave and convex. The screen assembly 85 can be held in place by applying compressive force to a side member of the screen assembly 85 or it can simply be held in place. The lower portion of the screen assembly 85 can be preformed to join with any type of joining surface of a vibrating screening machine.
[0183] [00183] Figure 34 is an isometric view of a final subscreen shown in Figure 3 having a simple screen element partially connected to it. Figure 35 is an enlarged view of the section E break of a final subscreen shown in Figure 34. In Figures 34 and 35, the screen element 16 is partially connected to the final subscreen 38. The screen element 16 is aligned with the subscreen 38 by means of the elongated connection members 44 and the screen element connection openings 24 such that the elongated connection members 44 pass through the screen element connection openings 24 and slowly extend beyond the screen element screening surface. As shown along with the end edge portion of the screen element 16, the elongated connecting member portions 44 extend beyond the screen element to the sieving surface and are fused to form beads on the screen element sieving surface, ensuring the screen element 16 the final subscreen unit 38.
[0184] [00184] Figure 36 shows a slightly concave screen assembly 91 having pyramid-shaped substrates incorporated into a portion of screen assembly 91 according to an exemplary embodiment of the present invention. The screen surface of the screen assembly can be substantially flat, concave and convex. The screen assembly 91 can be configured to deviate to a predetermined shape under the compression force. Screen assembly 91, as shown in Figure 36, incorporates pyramidal subscreens into a portion of the screen assembly installed closest to the influx of material into the vibrating screen machine. The portion incorporating the pyramidal subscreen allows for increased sieving surface area and targeted material flow. A portion of the screen assembly installed closest to the discharge end of the vibrating screen machine incorporates the flat underscreen. In the flat portion, an area can be provided such that the material can be allowed to dry and / or pie in a screen assembly. Various combinations of flat and pyramidal substrates can be included in a screen assembly depending on the desired configuration and / or the particular screening application. Also, vibrating screening machines that use multiple screen mounts can have individual screen mounts with varying configurations suitable for use together in specific applications. For example, screen assembly 91 can be used with other screen assemblies such that it is positioned close to the final discharge of a vibrating screening machine such as providing pie formation and / or drying of a material.
[0185] [00185] Figure 37 is a flow chart showing the steps to manufacture a screen assembly, according to an exemplary embodiment of the present invention. As shown in Figure 37, a screen manufacturer can receive performance specifications for the screen assembly from the screen assembly. The specifications can include at least one of the material requirement, open sieving area, capacity and cut-off point for a screen assembly. The manufacturer can then determine a screening aperture requirement (shape and size) for a screen element as described here. The manufacturer can then determine a screen configuration (for example, assembly size, shape of the sieving surface, etc.). For example, the manufacturer may have the screen elements arranged in at least one of the flat configuration and a non-flat configuration. A flat configuration can be constructed from central sub-screens 18 and final sub-screens 14. A non-flat configuration can include at least a portion of the central pyramid-shaped sub-screens 60 and / or final pyramid-shaped sub-screens 58. The screen elements injection molded. Subscreen units can also be injection molded, but are not required to be injection molded. Screen elements and subscreens can include a nanomaterial, as described here, dispersed. Both screen elements and subscreen units have been created, screen elements can be linked to subscreen units. The screen elements and subscreens can be linked together using the connection materials having a dispersed nanomaterial. The multiple subscreen units can be connected together to form the support structures. The central support structures are formed from central subscreens and final support structures are formed from final subscreens. Pyramid-shaped support structures can be created from pyramid-shaped subscreen units. The support structures can be connected such that the central support structures are in a central portion of the screen assembly and the final support structures are in a final portion of the screen assembly. The tie bars can be connected to a screen assembly. The different sieving surface areas can be accompanied by changing the number of sub-screens in a pyramid shape incorporated in a screen assembly. Alternatively, the screen elements can be connected to the subscreen units after connecting the multiple subscreens together or after connecting the multiple support structures together. Instead of the multiple independent sub-screens that are connected together to form a single unit, a sub-frame structure can be manufactured that is the desired size of the screen assembly. The individual screen elements can then be linked to a subscreen structure.
[0186] [00186] Figure 38 is a flow chart showing the steps to manufacture a screen assembly, according to an exemplary embodiment of the present invention. A thermoplastic mesh element can be injection molded. Sub-screens can be manufactured such that they are configured to receive the screen elements. Screen elements can be connected to subscreens and multiple subscreen assemblies can be connected, forming a sieving surface. Alternatively, the subscreens can be linked to each other before connecting the screen elements.
[0187] [00187] In another exemplary embodiment, a method for screening a material is provided, which includes connecting a screen assembly to a vibrating screening machine and forming an upper screening surface of the screen assembly in a concave shape, wherein the screen assembly includes a screen element having a series of sieving apertures forms a screen element sieving surface and a subscreen that includes multiple elongated structural members forms a grid structure having grid openings. The screen elements extend over the grid openings and are attached to an upper surface of the subscreen. The multiple sub-screens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly sieving surface comprised of the sieving surfaces of the multiple screen element. The screen element is a simple thermoplastic injection molded part.
[0188] [00188] Figure 39 is an isometric view of a vibrating screening machine having a simple screen assembly 89 with a flat screening surface installed on it with a section of the vibrating machine portion showing a screen assembly. Screen assembly 89 is a simple unit that includes a subscreen structure and screen elements as described here. The subscreen structure can be a single unit or it can be multiple subscreens connected together. While the screen assembly 89 is shown as a generally flat type assembly, it can be convex or concave and can be configured to be deformed into a concave shape from the compression assembly and the like. It can also be configured to be tensioned up or down, or it can be configured in another way by connecting different types of vibrating screening machines. While the embodiment of the screen assembly shows the coating of the total screening bed of the vibrating screening machine, the screen assembly 89 can also be configured in any desired shape or size and can cover only a portion of the screening bed.
[0189] [00189] Figure 40 is an isometric view of a screen element 99 according to an exemplary embodiment of the present invention. The screen element 99 is substantially triangular in shape. The screen element 99 is a simple thermoplastic injection molded part and has similar characteristics (which include screen opening sizes) as the screen element 16 as described here. Alternatively, the canvas element can be rectangular, circular, triangular, square, etc. Any shape can be used by the screen element and any shape can be used by a sub-screen as long as the sub-screen has grid openings that correspond to the shapes of the screen elements.
[0190] [00190] Figures 40A and 40B show the structure of the screen element 101, which can be a sub-screen structure, with the screen elements 99 connected to it forming a pyramidal shape. In an alternative embodiment, the complete pyramidal structure of the web element structure 101 can be molded by thermoplastic injection as a simple web element having a pyramid shape. In the configuration shown, the screen element structure has four sieving surfaces of the triangular screen element. The bases of two of the triangular sieving surfaces start at the two side members of the screen element and the bases of two other triangular sieving surfaces start at the two members of the screen element. The sieving surfaces slope upward at a central point above the end members of the screen element and side members. The angle of the inclined screening surfaces can be varied. The structure of the screen element 101 (or alternatively simple pyramidal screen elements) can be linked to a subscreen structure as described here.
[0191] [00191] Figures 40C and 40D show the structures of the screen element 105 with the screen elements 99 connected and having a pyramidal shape that falls below the side members and edge numbers of the structure of the screen element 105. Alternatively, the pyramid total can be molded by thermoplastic injection as a simple pyramid shaped screen element. In the configuration shown, individual screen elements 99 form four triangular screening surfaces. The bases of two triangular screening surfaces start at the two side members of the screen element and the bases of two other triangular screening surfaces start at two end members of the screen element. The sieving surfaces all tilt down to a central point below the end members of the screen element and side members. The angle of the inclined screening surfaces can be varied. The structure of the screen element 105 (or alternatively pyramids of the simple screen element) can be linked to a subscreen structure as described here.
[0192] [00192] Figures 40E and 40F show a structure of the screen element 107 having multiple pyramidal shapes that fall down and rise above the side members and edge members of the structure of the screen element 107. Each pyramid includes four elements of individual screens 99, but can also be formed as a simple pyramidal screen element. In the configuration shown, each screen element has sixteen triangular screening surfaces forming four separate triangular screening surfaces. Pyramidal sieving surfaces can tilt up or down from the end members of the screen element and side members. The structure of the screen element 107 (or alternatively simple pyramidal screen element) can be connected to a subscreen structure as described here. Figures 40 through 40F are just examples of how the variations can be used by the screen elements and support structures of the screen element.
[0193] [00193] Figures 41 to 43 show the cross-sectional views of the exemplary embodiments of the thermoplastic injection molded fabric element surface structures that can be incorporated into various embodiments of the present invention discussed therein. The screen element is not limited to the shapes and configurations identified in this. Because the screen element is molded by thermoplastic injection, multiple variations can be easily manufactured and incorporated into the various exemplary embodiments discussed in this description.
[0194] [00194] Figure 44 shows a pre-screen structure 200 for use with vibrating screening machines. The pre-screen frame 200 includes a support structure 300 that is partially lined with individual screen pre-assemblies 210. The screen pre-assemblies 210 are shown having multiple screen pre-elements 216 mounted on the pre-screen sub-screens 218 Although screen pre-assemblies 210 are shown to include six screen pre-screens 218 secured together, various numbers and types of sub-screens can be attached together to form various shapes and sizes of screen pre-assemblies 210. Pre-screens screen assemblies 210 are attached to the support structure 300 and form a continuous sieving pre-surface 213. pre-screen structure 200 can be mounted on a primary sieving surface. Screen pre-assemblies 210, screen pre-elements 216 and screen pre-screens 218 can include any of the characteristics of various embodiments of the screen assemblies, screen elements and subscreen structures described here and can be configured and assembled on the support structure of the pre-screen 300, which can have various shapes and configurations suitable for pre-screening applications. The pre-screen structure 200, screen pre-assemblies 210, screen pre-elements 216 and the pre-screen sub-screens 218 can be configured to be incorporated in pre-screening technologies (eg compatible with the assembly structures and screen configurations) described in US Patent Application No. 12 / 051,658.
[0195] [00195] Figure 44A shows an extended view of the screen pre-assembly 210.
[0196] [00196] The embodiments of the present invention described here, include the screening members and screening assemblies, can be configured for use with several different vibrating screening machines and parts thereof, which include machines indicated for wet and dry applications, machines having multilayered decks and / or multiple screening baskets and machines having various screen connection arrangements such as tensioning mechanisms (downwards and upwards), compression mechanisms, locking mechanisms, magnetic mechanisms, etc. For example, the screen assemblies described in the present disclosure can be configured to be mounted on the vibrating screening machines described in U. S. Patent No. 7,578,394; 5,332,101; 6,669,027; 6,431,366; and 6,820,748. In fact, the screen assemblies described here may include: secondary portions or tie bars that include U-shaped members configured to receive the upper type tensioning members, for example, as described in U. S. Patent No. 5,332,101; secondary portions or connecting bars that include openings that finger receivers configured to receive lower type tensioners, for example, as described in U. S. Patent No. 6,669,027; side members or connecting bars for loading the compression, for example, as described in U. S. Patent No. 7,578,394; or they can be configured by connecting and loading multi-layer machines, for example, such as the machines described in U. S. Patent No. 6,431,366. Screen assemblies and / or screening elements can also be configured to include the features described in U.S. Patent Application No. 12 / 460,200, which include the guide assembly technologies described in this and preformed panel technologies described in this. In addition, the screen assemblies and screening elements can be configured to be incorporated into the pre-screening technologies (for example, compatible with the mounting structures and screen configurations) described in U.S. Patent Application No. 12 / 051,658. U. S. Patent No. 7,578,394; 5,332,101; 4,882,054; 4,857,176; 6,669,027; 7,228,971; 6,431,366; and 6,820,748 and U.S. Patent Application No. 12 / 460,200 and 12 / 051,658, in which, together with their families and reported patent applications and the patents and patent applications referred to in these documents, are expressly incorporated herein by reference to this one.
[0197] [00197] In the preceding, the embodiments of the example are described. However, it will be evident that several modifications and changes can be made to this without departing from its broader spirit and scope. The specification and drawings will therefore be considered in an illustrative sense rather than a restrictive one.

权利要求:
Claims (39)
[0001]
Screen assembly for sieving materials, comprising: a screen element which includes a screen element sieving surface having sieve openings; and, a subscreen that includes a grid structure having grid openings, characterized by the fact that: the screen element extends over the grid openings and is attached to the subscreen surface; and, multiple sub-screens are fastened together to form the screen assembly and the screen assembly has a continuous screen assembly screening surface comprised of multiple screen element screening surfaces.
[0002]
Screen assembly according to claim 1, characterized by the fact that the screen element is an injection molded part.
[0003]
Screen assembly according to claim 1, characterized by the fact that the screen element is a thermoplastic injection molded part.
[0004]
Screen assembly according to claim 1, characterized by the fact that it also comprises a first screen element and a second screen element, wherein the grid structure includes a first and a second grid structure that forms a first grid opening and a second grid opening, wherein the sub-screen includes a groove portion and a base portion, the first and second grid structures include the first and second angular surfaces that reach the maximum groove point and extend downwardly from the portion of peak to the base portion, where the first and second web elements extend over the first and second angular surfaces, respectively.
[0005]
Screen assembly according to claim 4, characterized in that the first and second angled surfaces include a sub-screen connection arrangement configured to securely connect with a screen element connection arrangement.
[0006]
Screen assembly according to claim 1, characterized by the fact that each screen element includes parallel end portions and parallel side edge portions perpendicular to the end portions, wherein each screen element includes a screen element support member and a second screen element support member orthogonal to the screen element support member, the screen element support member extending between the end portions and being parallel to the side edge portions, the second element support member of mesh extending between the side edge portions and being parallel to the end portions, where each screen element includes a first series of reinforcement members parallel to the side edge portions, a second series of reinforcement members parallel to the portions end, where each screen element screening surface includes screen surface elements running parallel to the final portions and forming the open portions sieving structures, in which the end portions, side edge portions, first and second support members, first and second series of reinforcement members that structurally stabilize the screen surface elements and sieving openings.
[0007]
Screen assembly according to claim 1, characterized by the fact that the sieving openings are elongated slits with a width and length, the width of the sieving openings being from 43 microns to 1000 microns between the internal surfaces of each of the elements screen surface.
[0008]
Screen assembly according to claim 1, characterized by the fact that the sieving openings are elongated slits with a width and length, the width of the sieving openings being from 70 microns to 180 microns between the internal surfaces of each of the elements screen surface.
[0009]
Screen assembly according to claim 1, characterized by the fact that the sieving openings are elongated slits with a width and length, the width of the sieving openings being from 43 microns to 106 microns between the internal surfaces of each of the elements screen surface.
[0010]
Screen assembly according to claim 1, characterized by the fact that the sieving openings are elongated slits with a width and length, the width being from 0.044 mm to 4 mm and the length being from 0.088 mm to 60 mm.
[0011]
Screen assembly according to claim 1, characterized in that the screen assembly is configured to form a predetermined concave shape when subjected to a compression force by a unit by compression of a vibrating screening machine against at least one member side of the vibrating screen assembly when placed on the vibrating screening machine.
[0012]
Screen assembly according to claim 1, characterized by the fact that the screen assembly includes a joining surface and that it is configured at the interface with a joining surface of a vibrating screening machine such that the screen assembly is guided in a fixed position on the vibrating screening machine.
[0013]
Screen assembly according to claim 12, characterized in that the joining surface is formed in a portion of at least one subscreen.
[0014]
Screen assembly according to claim 12, characterized in that the screen mounting joint surface is a notch formed in the middle of a lateral edge of the screen assembly.
[0015]
Screen assembly according to claim 1, characterized by the fact that it also comprises a load bar connected to an edge surface of the screen assembly sub-screen, the load bars configured to distribute a load across a surface of the screen assembly screen.
[0016]
Screen assembly according to claim 15, characterized in that the screen assembly is configured to form a predetermined concave shape when subjected to a compressive force by a compression member of a vibrating screening machine against the load bar vibrating screen assembly.
[0017]
Screen assembly according to claim 1, characterized in that the screen assembly has a concave shape and is configured to deflect and form a predetermined concave shape when subjected to a compression force by a member of a vibrating screening machine .
[0018]
Method for making a screen assembly for sifting materials, characterized by the fact that it comprises: injection molding a screen element, the screen element which includes a screen element sieving surface having sieve openings; fabricating a sub-screen that supports the screen element, the sub-screen having a grid structure with grid openings, the screen element extending over a grid opening; and, securing the screen element to an upper surface of the sub-screen, the screen assembly having a continuous screen screening surface unit comprised of multiple screen element screening surfaces.
[0019]
Method according to claim 18, characterized in that at least one of the screen element and the sub-screen is a simple thermoplastic injection molded part.
[0020]
Screen assembly for sieving materials, comprising: a screen element; and, a subscreen, characterized by the fact that: the screen element and the subscreen are attached together; and, multiple subscreens are attached together to form the screen assembly.
[0021]
Screen assembly according to claim 20, characterized by the fact that the screen element has sieving openings between 40 microns and 1000 microns.
[0022]
Screen assembly according to claim 20, characterized in that the screen element comprises thermoplastic polyurethane.
[0023]
Screen assembly according to claim 20, characterized by the fact that the sub-screen comprises at least one of glass, carbon and nylon.
[0024]
Screen assembly according to claim 20, characterized by the fact that the screen element is a single piece of injection molded thermoplastic.
[0025]
Screen assembly according to claim 24, characterized in that the screen element has a plurality of sieving openings which are elongated slits with a width and length, the width of the sieving openings being between 40 microns and 1000 microns between the inner surfaces of each screen surface element.
[0026]
Screen assembly according to claim 20, characterized by the fact that the screen element is micro molded and has sieve openings between 40 microns and 150 microns.
[0027]
Screen assembly according to claim 20, characterized in that the screen element comprises thermoplastic polyurethane and the sub-screen comprises at least one of glass, carbon and nylon.
[0028]
Screen assembly according to claim 24, characterized by the fact that the screen element has sieve openings between 40 microns and 1000 microns.
[0029]
Screen assembly according to claim 24, characterized by the fact that the screen element has sieve openings between 40 microns and 150 microns.
[0030]
Screen assembly according to claim 24, characterized in that the screen element has a plurality of sieving apertures which are elongated slits with a width and length, the width of the sieving apertures being between 40 microns and 150 microns between the inner surfaces of each screen surface element.
[0031]
Screen assembly for sieving materials, comprising: a screen element; and, a subscreen, characterized by the fact that: the screen element is a single piece of injection molded thermoplastic and is attached to the underscreen; and, the screen element has sieve openings between 40 microns and 150 microns.
[0032]
Screen assembly according to claim 31, characterized by the fact that multiple sub-screens are attached together to form the screen assembly.
[0033]
Screen assembly according to claim 31, characterized by the fact that multiple screen elements are attached to a single subscreen to form the screen assembly.
[0034]
Screen assembly according to claim 31, characterized in that the screen element comprises thermoplastic polyurethane.
[0035]
Screen assembly according to claim 31, characterized in that the screen element has a plurality of sieving openings which are elongated slits with a width and length, the width of the sieving openings being between 40 microns and 150 microns between the inner surfaces of each screen surface element.
[0036]
Screen assembly for sieving materials, comprising: multiple units stuck together to form the screen assembly, characterized by the fact that: each unit includes a screen element having an upper screen surface and a lower screen surface attached to a sub-screen; and, the upper screen surfaces of the screen elements form a continuous screen surface of the screen assembly.
[0037]
Screen assembly according to claim 36, characterized by the fact that the screen element is a single piece of injection molded thermoplastic.
[0038]
Screen assembly according to claim 36, characterized by the fact that the screen element has sieve openings between 40 microns and 1000 microns.
[0039]
Screen assembly according to claim 36, characterized by the fact that the screen element has sieving openings between 40 microns and 150 microns.

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-11-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-05-05| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-07-21| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/03/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US201261652039P| true| 2012-05-25|2012-05-25|

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US61/652039|2012-05-25|

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US201261714882P| true| 2012-10-17|2012-10-17|

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US61/714882|2012-10-17|

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PCT/US2013/030960|WO2013176747A2|2012-05-25|2013-03-13|Injection molded screening apparatuses and methods|

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