• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SEALING SYSTEM FOR MOLDING MACHINE. A system for molding a container from a preform, in which the preform has a finish and a support ring. The system includes a mold that has a mold cavity that defines an internal surface and adapted to accept the preform, a pressure system that has an inlet and an outlet that expels fluid, a blowing injector that receives the fluid from the system pressure and introduces the fluid under pressure into the preform, thereby expanding the preform towards the inner surface of the mold cavity and creating a resulting container. The system also includes a first seal coupling selectively coupled between the blow nozzle and the finish of the preform and a second seal coupling selectively coupled between the blow nozzle and an adjacent feature.
    公开号:BR112014015428B1
    申请号:R112014015428-7
    申请日:2012-12-20
    公开日:2020-11-17
    发明作者:Kirk Edward Maki；George David Lisch；Bradley Wilson
    申请人:Amcor Limited；
    IPC主号:
    专利说明:

    CROSS REFERENCE TO RELATED ORDERS
    [0001] This application claims priority for United States Utility Application No. 13 / 721,291, filed on December 20, 2012, and the benefit of United States Provisional Application No. 61 / 578,564, filed on December 21, 2012 2011. Descriptions of all orders above are hereby incorporated by reference. Field of the Invention
    [0002] The present description refers, in general, to a device for filling containers with a commodity, such as a liquid commodity. More specifically, the present description refers to a sealing device and method of using it for blow molding and filling polyethylene terephthalate (PolyEthylene Terephthalate - PET) containers in a single process. Background of the Invention
    [0003] This section provides basic information related to this description, which is not necessarily the state of the art.
    [0004] As a result of environmental and other concerns, plastic containers, more specifically polyester and, even more specifically, polyethylene terephthalate (PET), are being used now more than ever to pack numerous goods previously supplied in containers of glass. Manufacturers and packers, as well as consumers, have recognized that PET packaging is light, cheap, recyclable and manufactured in large quantities.
    [0005] Container manufacturers use mechanical processing and thermal processing to increase the crystallinity of a container's PET polymers. Mechanical processing involves orienting the amorphous material to obtain stress hardening. This processing generally involves elongating an injection molded PET preform along a longitudinal axis and expanding the PET preform along a transverse or radial axis to shape a PET container. The combination promotes what manufacturers define as biaxial orientation of the molecular structure in the container.
    [0006] Traditionally, blow molding and filling have been developed as two independent processes, in many cases carried out by different companies. In order to make bottle filling more profitable, some packers have chosen to blow mold at home, in many cases by integrating blowers directly into their filling lines. Equipment manufacturers have recognized this advantage and are selling "integrated" systems that are designed to ensure that the blower and filling device are fully synchronized. Despite efforts to keep the two processes together, blow molding and filling remain two separate, independent processes. As a result, significant costs may be incurred during the execution of these two processes separately. Thus, there is a need for a hydraulic or liquid blow molding system suitable for molding and filling a container in a single operation. In addition, there is a need for a modified preform that is particularly well suited to the molding system that shapes and fills a container in a single operation. Summary of the Invention
    [0007] This section provides a general summary of the description and is not a comprehensive description of its entire scope or all of its resources.
    [0008] Consequently, the present description teaches a system for molding a container from a preform, in which the preform has a finish and a support ring. The system includes a mold that has a mold cavity that defines an internal surface and adapted to accept the preform, a pressure system that has an inlet and an outlet that expels fluid, a blowing injector that receives the fluid from the system pressure and introduces the fluid under pressure into the preform in order to expand the preform towards the inner surface of the mold cavity and create a resulting container. The system further includes a first seal coupling capable of selective coupling between the blow nozzle and the finish of the preform and a second seal coupling capable of selective coupling between the blow nozzle and an adjacent resource.
    [0009] Other areas of application will be evident from the description provided here. The description and specific examples in this summary are for the purpose of illustration only and are not intended to limit the scope of the present invention. Brief Description of Drawings
    [0010] The drawings described here are for illustrative purposes only of selected embodiments and not of all possible implementations, and are not intended to limit the scope of this description.
    [0011] Figure 1 is a partial cross-sectional view illustrating a device for molding a container using an optional stretch rod and pressurized liquid, where the left portion of the center line illustrates an extended position and the right portion of the line center illustrates a stowed position.
    [0012] Figure 2 is a partial upper cross-sectional view illustrating the device in Figure 1 for molding a container using an optional stretch rod and pressurized liquid, where the left portion of the center line illustrates an extended position and the right portion of the center line illustrates a stowed position.
    [0013] Figure 3 is a partial cross-sectional view that illustrates a ventilation system according to some embodiments of the present teachings that have a mobile valve system to selectively open and close the ventilation system.
    [0014] Figure 4 is a partial cross-sectional view that illustrates a decentralized ventilation system according to some embodiments of the present teachings.
    [0015] Figure 5 is a schematic top view illustrating a decentralized ventilation system.
    [0016] Figure 6 is a partial cross-sectional view that illustrates a sealing pin that has a ventilation system located inside a stretching rod according to some embodiments of the present teachings.
    [0017] Figure 7 is a partial cross-sectional view that illustrates a drawing rod that has a plurality of openings according to some embodiments of the present teachings.
    [0018] Figure 8 is a partial cross-sectional view that illustrates a single decentralized ventilation system according to some embodiments of the present teachings.
    [0019] Figure 9 is a schematic top view illustrating a plurality of openings being hydraulically coupled to a collection ring and a main relief line according to some embodiments of the present teachings.
    [0020] Figure 10 is a partial cross-sectional view that illustrates a ventilation system according to some embodiments of the present teachings.
    [0021] Figure 11 is a partial cross-sectional view that illustrates a suction system according to some embodiments of the present teachings.
    [0022] Figure 12 is a partial cross-sectional view that illustrates a suction system according to some embodiments of the present teachings.
    [0023] Figure 13 is a partial cross-sectional view that illustrates a suction system according to some embodiments of the present teachings.
    [0024] The corresponding reference numbers indicate corresponding parts throughout the various views of the drawings. Detailed Description of the Invention
    [0025] Exemplary embodiments will now be described more fully with reference to the attached drawings. Exemplary embodiments are provided so that this description is thorough and fully transmits the scope to those skilled in the art. Numerous specific details are presented as examples of specific components, devices and methods to provide a comprehensive understanding of the embodiments of the present description. It will be apparent to those skilled in the art that specific details need not be employed, that exemplary embodiments can be realized in many different ways and that they should not be construed as limiting the scope of the invention.
    [0026] The terminology used here is for the purpose of describing only particular exemplary embodiments and is not intended to be limiting. As used here, the forms in the singular "one", "one", "o" and "a" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "including" and "having" are inclusive and therefore specify the presence of established characteristics, integers, steps, operations, elements and / or components, but do not exclude the presence or addition one or more of other characteristics, integers, steps, operations, elements, components and / or groups thereof. The steps of the method, processes and operations described here are not to be interpreted as necessarily requiring their realization in the particular order discussed or illustrated, unless specifically identified as an order of realization. It should also be understood that additional or alternative steps can be employed.
    [0027] When an element or layer is said to be "over", "plugged into", "connected to" or "attached to" another element or layer, it can be directly attached, connected or attached to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is said to be "directly on", "directly embedded in", "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between the elements should be interpreted in a similar way (for example, "between" versus "directly between", "adjacent" versus "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
    [0028] Although the terms first, second, third, etc., can be used here to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited these terms. These terms can be used only to distinguish an element, component, region, layer or section from another region, layer or section. Terms such as "first", "second" and other numeric terms, when used here, do not imply a sequence or order, unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below can be called a second element, component, region, layer or section without departing from the teachings of exemplary embodiments.
    [0029] Spatially relative terms, such as "internal", "external", "below", "below", "lower", "above", "upper" and so on, can be used here for ease of description to describe an element or the relationship of an element with other element (s) or characteristic (s), as illustrated in the figures. Spatially relative terms are intended to cover different orientations of the device in use or operation, in addition to the orientation represented in the figures. For example, if the device in the figures is facing upwards, elements described as "below" or "under" other elements or characteristics would then be oriented "above" other elements or characteristics. Thus, the exemplary term "below" can encompass both an upward and downward orientation. The device may otherwise be oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used here interpreted accordingly.
    [0030] The present teachings provide a blow molding device and injection system and a method of using it, in order to allow the use of liquids as an injection agent during the molding process. The present teachings further provide a method and device for controlling and / or relieving the internal liquid pressures associated with the molding process. These liquids can be a disposable liquid or, in some embodiments, they can comprise a liquid commodity. Therefore, in some embodiments, the liquids used for molding the container may remain there for final packaging. The blow molding device and injector system allow the controlled use of the liquid to minimize the likelihood of contamination and prevent leakage during cycling. According to these principles, the molding and filling of a container can be achieved in a single step without sacrificing cleanliness and sanitary conditions.
    [0031] As will be discussed in more detail here, the shape of the molding device and injector system of the present teachings and the container molded with them can be molded according to any of a series of variations. As a non-limiting example, the molding device of the present invention can be configured to form any one of a plurality of containers and be used in relation to a number of fluids and goods, such as drinks, food or other materials of the type hot filling.
    [0032] It will be appreciated that the exact size and shape of the molding device and injector system are dependent on the size of the container and the required operational parameters. Therefore, it should be recognized that variations may exist in the designs currently described. According to some embodiments, it should also be recognized that the mold can comprise several characteristics for use with containers having vacuum absorbing characteristics or regions, such as panels, ribs, grooves, depressions and so on.
    [0033] The present teachings refer to the molding of plastic containers in one piece using a liquid. In general, these containers, after molding, define a body that includes an upper portion having a cylindrical side wall that forms a finish. Integrally molded with the finish and extending downwards from it is a shoulder portion. The shoulder portion merges into and forms a transition between the finish and a side wall portion. The side wall portion extends downwardly from the shoulder portion to a base portion that has a base. An upper transition portion, in some embodiments, can be defined in a transition between the shoulder portion and the side wall portion. A lower transition portion, in some embodiments, can be defined at a transition between the base portion and the side wall portion.
    [0034] The exemplary container can also have a neck. The neck can have an extremely short height, that is, becoming a short extension from the finish, or an elongated height, extending between the finish and the boss portion. The upper portion can define an opening. Although the container is presented as a beverage container and a food container, it will be appreciated that containers having different shapes, such as side walls and openings, can be made in accordance with the principles of the present teachings.
    [0035] The finish of the plastic container can include a threaded region that has threads and a support ring. The threaded region is a means for attaching a similarly threaded seal or cap (not shown). Alternatives may include other suitable devices that attach to the finish of the plastic container, such as a pressure cap or fitting, for example. Consequently, the seal or cap (not shown) attaches to the finish, preferably to provide an airtight seal to the plastic container. The seal or cap (not shown) is preferably of a plastic or metal material conventional for the sealing industry and suitable for subsequent thermal processing.
    [0036] The container can be shaped according to the principles of the present teachings. As illustrated throughout the figures, including figures 1 and 8, a preform version 100 of the container includes a support ring 102, which can be used to support or guide the preform through and at various stages of manufacture . For example, the preform can be supported by the support ring 102, the support ring 102 can be used to assist in positioning the preform in a mold cavity or the support ring 102 can be used to support a container intermediate once molded. As will also be discussed here, support ring 102 can also be used to improve a sealing interface between a mold injection system and preform 100 during molding and filling. At the beginning, the preform can be placed in the mold cavity, so that the support ring is attached to an upper end of the mold cavity. In general, the mold cavity has an internal surface that corresponds to a desired external profile of the blown container. More specifically, the mold cavity according to the present teachings defines a body molding region and a base molding region.
    [0037] In some embodiments, an internal stretching rod device (see figures 1 and 2) extends to the heated preform within the mold cavity, thereby orienting the polyester material in an axial direction in molecular terms which generally corresponds to the central longitudinal axis of the container. Although the stretching rod extends to the preform, a liquid helps to extend the preform in the axial direction and to expand the preform in a circumferential or winding direction, thereby substantially conforming the polyester material to the shape of the mold cavity and further orienting the polyester material in molecular terms in a direction generally perpendicular to the axial direction, thereby establishing the biaxial molecular orientation of the polyester material in one part, most or all of the intermediate container. In some embodiments, the pressurized liquid keeps the polyester material oriented in molecular terms mainly biaxial against the mold cavity for a period of time before removing the container from the mold cavity.
    [0038] With particular reference to figures 1 and 2, there is provided a molding device and injector system 10 comprising an internal stretching rod device 20 and an injected system 22 molded with the same which are each independently actionable and still, in some embodiments, simultaneously activated. The internal drawing rod device 20 comprises a set of drawing rod elements 24 which is located slidably within a housing 26. The assembly of internal drawing rod element 24 and injector system 22 are shown both in one position extended as to a retracted position (left of the centerline CL in figures 1 and 2 and right of the centerline CL in figures 1 and 2, respectively).
    [0039] The drawing rod element assembly 24 may comprise a drawing rod 28 which is located slidably (at least indirectly) within a central hole 30 of the housing 26. The drawing rod 28 is generally cylindrical in shape having a coupling tip portion 32 at a distal end and a piston portion 34 at a proximal end. The tip portion 32 is shaped to engage preform 100 during fabrication, molding and / or filling. The piston portion 34 is received within a piston chamber 36 to closely conform to it to define a piston assembly (for example, pneumatic, hydraulic, servo, mechanical or similar). Piston portion 34 is responsive to changes in pneumatic, hydraulic, servo, mechanical or similar pressure within piston chambers 36A and 36B, thereby causing piston portion 34 to move in a direction generally aligned with the center line. CL between an extended position (left side) and a retracted position (right side). The movement of the piston portion 34 thus causes associated movement of the drawing rod 28 and the tip portion 32.
    [0040] Additionally, in some embodiments, the injector system 22 comprises a sealing rod 50 which is located slidably within the housing 26. That is, the injector system 22 can comprise a sealing rod 50 which is located slidably. inside the central hole 30 of the housing 26. The sealing rod 50 includes a coupling seal portion 52 at a distal end and a piston portion 66 at a proximal end. The sealing portion 52 is shaped to engage a narrowed distal portion 56 of the central hole 30. In this way, the sealing portion 52 can be positioned in a retracted position where sealing portion 52 is spaced from an enlarged intermediate portion 31 of the central hole 30 to allow the liquid flow to pass through there. The sealing portion 52 can also be positioned in an extended and seated position where the sealing portion 52 fits tightly to the narrowed distal portion 56. In the extended and seated position, the sealing portion 52 allows liquid to flow from a fluid inlet 58 , through a ring 60 from the central hole 30, to the enlarged intermediate portion 31 of the central hole 30. However, in this position, the flow out of the injector system 22 is prohibited. In the retracted position, the sealing portion 52 is moved away from the narrowed distal portion 56 and therefore allows liquid to flow from the fluid inlet 58, through the ring 60 of the central hole 30, to the enlarged intermediate portion 31 of the central hole 30 and out of the fluid injector 62 and to the preform 100. The pressure of the fluid within the preform 100 causes the preform 100 to expand and be shaped into a predetermined shape that conforms to the mold cavity. To achieve a desired final shape, it is typically necessary to choose a fluid pressure that is high enough to propel the preform in all portions of the mold cavity. Upon completion of the molding process, the sealing portion 52 can return to the extended and seated position to thereby seal the fluid injector 62 and prevent further liquid flow from the injector.
    [0041] In some embodiments, as shown in figure 1, the housing 26 may comprise an annular depression 70 formed along a lower side of the housing 26 to hermetically receive the preform 100 along the threaded region, the sealing rib bottom and / or the support ring. In some embodiments, as shown in figures 3, 4, and 8, a sealing element 71 can be located between the preform 100 and the annular depression 70, such as along an upper surface thereof, for hermetically coupling the injector system 22 against preform 100 to allow fluid sealing between them.
    [0042] In addition, in some embodiments, one or more sealing elements are used to improve the sealing connection between the injection system 22 and the preform 100. More particularly, in some embodiments, one or more sealing elements are used to create a sealing interface between the injector system 22 and the preform 100. These additional sealing elements described here can be used in addition to sealing elements 71 and / or in place of them. The sealing configuration between the injection system 22 and the preform 100 not only seals the upper part of the preform 100 during the molding and filling phase, but also serves to seal the upper and / or lower part of the neck that it supports ring 102 (Figure 8), thereby preventing or at least minimizing the leakage of liquid into the mold and / or along the outside of the preform 100 prior to molding and filling. The use of the present sealing technique also allows the use of higher molding pressures. It will be appreciated that the seals of the present teachings, including seals 71, 73, 75 and 78, can be made of any sealing material that allows a resilient and reliable sealing coupling between the respective elements. Therefore, it should also be noted that a seal used for sealing between metallic elements may differ from a seal used for sealing between a metallic element and a preform or PET container. In general, the seals of the present teachings can be rings, joints and so on, and can be made of any resilient material, such as rubber, silicone, elastomers and so on known in the art.
    [0043] As shown in figures 8 and 10, in some embodiments, the injector system 22 and / or molding device 10 may comprise an injector-to-mold seal 73, a support-to-mold ring seal 75 and / or a support injector-ring seal 78. It will be appreciated that although seal 71, seal 73, seal 75 and seal 78 are described in some embodiments here as being separate elements from their main adjacent components, it should be noted that the The discussion here should not be considered as limiting seals 71, 73, 75 and 78 to include only distinct elements. That is, in some embodiments, seals 71, 73, 75 and 78 can each include a sealing coupling by virtue of the contact of the associated main elements. For example, the seal 73 can be a sealing coupling of the contact surfaces of the injector system 22 and the molding device 77, such as through a metal to metal contact surface. Likewise, the seal 75 can be a sealing coupling of the contact surfaces of the support ring 102 and the molding device 77, such as through a metal-plastic contact surface. Therefore, it is important to recognize that the principles of the present teachings should not be considered as being limited to the inclusion of a separate physical element in these sealing interfaces. The present teachings can be equally useful, in some embodiments, when using a contact face between adjacent elements without the need for a separate element. That is, the present discussion will focus on the use of a separate element, but the claims should not be considered to be limited to a separate element, unless specifically noted.
    [0044] The injector-to-mold seal 73 may comprise a sealing element located between a lower surface of housing 26 of the injector system 22 and an upper surface 79 of a molding device 77. Thus, during actuation and coupling of the injector system 22 and molding device 77, a fluidic seal is formed by virtue of the mechanical coupling of the injector system 22, injector-to-mold seal 73 and molding device 77.
    [0045] Likewise, the support-for-mold ring seal 75 can act as a sealing element and be located between an upper surface 110, which may be different from the upper surface 79, of the molding device 77 and a lower portion 104 of the support ring 102. Thus, during activation and coupling of the injector system 22 and the molding device 77, a fluidic seal is formed by virtue of the mechanical coupling of the preform 100 to the support ring seal- para-mold 75 and molding device 77.
    [0046] Furthermore, the injector-to-support ring seal 78 can act as a sealing element and be located between the lower surface of housing 26 of the injector system 22 and an upper portion 105 of the support ring 102 (Figure 10). Thus, during activation and coupling of the injector system 22 and the molding device 77, a fluidic seal is formed by virtue of the injector system 22, injector-to-support ring seal 78 and preform 100.
    [0047] In some embodiments, pressurized air may be introduced in volume 112 between the sealing element 71 and / or the injector-to-seal ring 78, the injector-to-mold seal 73 and / or the gasket seal. support-to-mold 75 to further increase the quality of the sealing interface and provide back pressure to the outside of the container finish, thereby preventing unwanted deformation that may result from filling or molding pressure. This back pressure is preferably generally equal to the internal pressure created within the preform during filling and molding of the container. This back pressure will be in the range of about 1 MPa to about 6 MPa (10 bar to about 60 bar) but, preferably, about 4MPa (40 bar) for most processes. In some embodiments, the sealing element 71, the injector-to-mold seal 73, the support-to-mold ring seal 75 and / or the injector-to-support ring seal 78 can be made of any sealing material, such as silicone, rubber or similar.
    [0048] It should be appreciated that the manufacturing techniques of the present teachings provide the ability to employ increased pressures of the molding fluid compared to those commonly used in conventional two-stage blow molding. In fact, the use of the aforementioned seals makes it possible to increase molding pressures, reduce product waste, increase production operation time (due to less cleaning and / or decontamination) and improve the quality of the container.
    [0049] It should be noted, however, that in some applications and with some liquids, some overflow of liquid goods L may occur. That is, as it should be appreciated from the above, at the end of the molding cycle, the injector system 22 is decoupled from the preform 100 (or from the finally molded and filled container). Typically, the liquid product inside the container can be under at least some pressure and, as such, the coupling of the injector system 22 can result in an expulsion of liquid goods from the filled container. Therefore, according to additional principles of the present teachings, controlled decompression, pressure equalization and / or application of a slight vacuum (for example, about 5 KPa (50 mbar)) to the liquid is foreseen.
    [0050] Various techniques to relieve spills or reduce spills can be used to control or manage this expulsion of liquid. This expulsion is believed to result from any of a number of factors, such as heating the air inside the preform, in which the air expands with the heat transfer of the liquid being injected and the resulting thermal expansion of the air inside the preform pushes the liquid out of the container. In some situations, the pressure that forms inside the preform is not completely removed from the system when the injector assembly is lifted from the container. In addition, in some situations, when a CO2 filling cycle is carried out, CO2 may come out of the solution due to product agitation or sudden decompression and results in increased pressure. Finally, in some situations, retraction of the container resulting from residual stresses in the container after formation and filling at higher temperatures and cause a reduced volume of the container and increased pressure. However, in each of the situations mentioned above, it has been found that they can be more readily controlled using a ventilation system.
    [0051] With particular reference to figures 3 to 9, a plurality of ventilation systems is illustrated for use in relation to the principles of the present teachings. In some embodiments, a ventilation system 80 can be used for ventilation or otherwise decompress the internal pressure of the preform 100 (or the resulting filled container) before or in conjunction with removal of the injector system 22 from it . In some embodiments, the stretch rod 28 can allow ventilation through a central ventilation hole 81 of the stretch rod 28. Vent hole 81 can be hydraulically coupled to a storage tank 114, a drain or reintroduced into the system ( assuming that such reintroduction is adequate) via a vent line 82. In some embodiments, a valve 83 may be located within the vent line 82 to monitor and / or control the ventilation process. Valve 83 can be a fast-acting valve that controls pressure release through a single opening and closing or controlled opening and sequencing to slowly control pressure loss through programmed valve movements. As shown in Figure 7, the vent hole 81 can be fluidly coupled to the internal volume of the preform 100 (or the resulting filled container) via one or more ports or vent 84. It will be recognized that the number of ports 84 used and their associated location may vary depending on the particular application. In some embodiments, the doors 84 may be located at the distal end 32 of the drawing rod 28 and / or located at an angle to the central axis of the drawing rod 28.
    [0052] In some embodiments, as seen in figures 10 and 11, one or more ventilation ports 120, 122 can be located above and / or below the seal 71 to aspirate the residual liquid from volume 112 by means of a vacuum source . It should be understood that several doors can be combined above the sealing surface 71 to allow ventilation of the residual air from the preform before or during molding of the container and also below the sealing surface 71 to allow aspiration of residual liquid from the finishing area of the container during and after molding the container. Such a suction system, as shown in figure 11, can comprise a single vacuum port 120 with an inlet located below the sealing surface 71. Vacuum port 120 will be connected to a vacuum source to create negative pressure in the empty space between the finish of the container and the injector system 22 for as long as the seal is maintained. At the moment when the injector system 22 is removed from the sealing surface 71, the flow of air will be facilitated through the vacuum port 120, in a circumferential space 126, thus allowing removal of the residual liquid around the outside of the finishing area. of the container.
    [0053] In another embodiment seen in figure 12, the suction system may comprise several openings 130, each having entry points below the sealing surface 71. The multiple ports 130 will include at least one vacuum port 132 and at least one airflow control channel 134 to allow a continuous flow of air around the exterior of the container finish while the injector system 22 is in a downward position and tightly coupled to the sealing surface 71. In the present embodiment, the airflow channel airflow control 134 allows air to enter the injector system 22, while air is exiting through vacuum port 132 as the vacuum source provides a means for airflow, thus allowing continuous removal of liquid unwanted effect of the external finish area 112, even with a seal being maintained between the injector system 22 and the sealing surface 71.
    [0054] In yet another embodiment seen in figure 13, the suction system can comprise several doors 140, each with entry points below the sealing surface 71. The multiple openings will include at least one pressure opening 142 and at least one airflow control channel 144 to allow a back pressure to be applied to the exterior of the finish during molding of the container and subsequent removal of excess liquid from the external finish area through the airflow control channel 144. In this embodiment, the airflow control channel 144 includes a pressure control valve 146, such as a check valve, which allows selective movement between an open and closed position. This valve will be in a closed position when molding the container. During or before molding, a pressurized fluid, such as air, is introduced through the pressure opening 142. The pressurized air will serve to create a back pressure on the external finish to neutralize any forces applied to the internal finish during the filling and molding process, in this way, avoiding unwanted deformation of the finish. This back pressure will be in the range of about 1 MPa to about 6 MPa (10 bar to about 60 bar) but, preferably, about 4MPa (40 bar) for most processes. After the molding step, the pressure control valve 146 is opened, allowing the pressurized air to flow freely through the airflow control channel 144, resulting in the removal of unwanted liquid from the external finish area 112, even if a seal is maintained between the injector system 22 and the sealing surface 71.
    [0055] In some embodiments, as shown in figure 6, ventilation can be performed using a stretching rod sealing pin 85 that has a stretching rod sealing pin tip 86 located at its distal end. The sealing pin of the stretching rod 85 is slidably located inside a hole 87 that extends centrally along the stretching rod 28. Tip 86 can be positioned between an open position, away from the end of the stretching rod 28 , and a closed position, in sealing coupling with the end of the drawing rod 28. In operation, the sealing pin of the drawing rod 85 can be operated between the open and closed position to allow selective ventilation of the internal volume of the pre- mold 100. By positioning the sealing pin of the stretching rod 85 at a distal end of the drawing rod 28, the control of liquid goods L is more positive and thus drops of liquid can be more easily avoided. That is, by positioning the control element close to the outlet of the drawing rod 28, the residual liquid inside the hole is avoided and drips are minimized. This can serve to minimize contamination and the need for additional cleaning cycles.
    [0056] The movement of the sealing pin of the stretching rod 85 can be obtained using an air cylinder, motor or other means of creating a mechanical movement, such as sliding and / or rotation. This would allow precise pressure relief and timing of the filling head. It could be used to vent the air trapped in the preform at the start of filling. A vacuum could be applied to the drawing rod or valve to assist in removing pressure and removing a small amount of liquid from the drawing rod tip to prevent dripping in the preform.
    [0057] In some embodiments, as illustrated in figures 3, 4, 8 and 9, ventilation can be achieved through one or more ports or vents 84 located in housing 26 or in the injector assembly 22. More particularly, one or more vents 84 extending through at least a portion of the injector assembly 22 can be located generally adjacent to the opening or finishing area of the preform 100. In some embodiments, as shown in figure 9, these vents 84 may be located radially (Figure 9) and fluidly coupled to a collection ring 87 which is fluidly coupled to a main relief valve 88. In some embodiments, a decentralized ventilation configuration can be used, as shown in figure 5.
    [0058] In some embodiments, as shown in figure 3, the vents 84 that extend through at least a portion of the injector assembly 22 can be opened and closed mechanically using an internal injector element 89 that is located slidably within the portion extended intermediate 31 of the hole 30. In this way, the internal injector element 89 can be linearly or rotatively driven through a control device, such as a motor, piston or similar, and moved between an elevated and open position (Figure 3) and a lowered and closed position. In the lowered and closed position, an internal injector element 89 undergoes downward translation (in figure 3), so that a surface 90 of the internal injector element 89 rests on a surface 91 of housing 26 (or injector assembly 22), causing it to collapse and thus close the vent 84. In some embodiments, a distal end 92 of the inner injector element 89 may still extend downwards, enough to close the additional openings 84 (shown hidden in figure 3).
    [0059] During operation, variations in the ventilation process can be used as appropriate. That is, in some embodiments, the injector system 22 can move downwards to engage with the finish of the preform 100, so that the seal 71 contacts and hermetically couples to the preform 100. The internal injector element 89 can continue to move downward to seal the openings 84. The liquid goods L can then be injected to form and fill the preform 100 in a resulting filled container. The retraction of the internal injector element 89 can be carried out to discharge the pressure inside the resulting filled container before decoupling the seal 71 from the container. The process can then be completed by removing the injector system 22 from the molded and filled container without overflow or contamination.
    [0060] Alternatively, before closing the openings 84, the liquid goods L can be injected into the preform 100 to allow air and / or liquid inside the preform 100 to escape through the open vents 84. Thus, once that a sufficient amount of air and / or liquid is vented through the vents 84, the vents 84 can be closed to complete the molding and filling process. Additionally, in some embodiments, the stretch rod 28 can be extended into the preform 100 prior to injection of liquid goods L to assist in displacing air within the preform 100 before or simultaneously with the injection of liquid goods L In addition, in some embodiments, vents 84 can be used to extract a vacuum (such as through the use of a Venturi system and / or a pump system) over the preform 100 after closing the injector assembly 22 and before injection of liquid goods L. Each of these solutions serves to eliminate or at least minimize the potential for expelling liquid after the molding and filling cycle, providing a method for evacuating at least part of the fluid within the preform 100 prior to removal of the injector assembly 22. It will be recognized that the vents 84 can be opened at any time before the injection of liquid goods L, at least partially simultaneously with the injection of m liquid goods L and / or after injection of liquid goods L.
    [0061] Finally, in some embodiments, it will be recognized that an inert gas delivery system can be used to inject inert gas, such as nitrogen or carbon dioxide, through the vents 84 near the distal end of the stretch rod 28 to displace air inside the preform. The displaced air is allowed to escape through the open vents 84 of the injector assembly 22. This allows removal of oxygen and other harmful gases from the preform while adding inert or potentially useful gases to the preform before filling with the liquid.
    [0062] It will also be recognized that, in some embodiments, the openings can also be cleaned using pre-filling cleaning methods, including CIP. Ventilation can also assist in the CIP cleaning process, allowing liquid to flow closer to the bottom of the blow gun.
    [0063] Alternatively, other manufacturing methods using other conventional materials including, for example, thermoplastics, high density polyethylene, polypropylene, polyethylene naphthalate (PEN), a PET / PEN blend or copolymer and multiple multilayer structures can be suitable for the manufacture of the plastic container. Those skilled in the art will readily understand and understand alternative methods of making plastic containers.
    [0064] According to some embodiments, the teachings of the present invention provide a system for molding a container from a preform, in which the preform has a finish and a support ring. The system comprises a mold having a mold cavity that defines an internal surface and adapted to accept the preform; a pressure system that has an inlet and an outlet, the pressure system expelling a fluid; a blowing injector that receives the fluid from the pressure system and introduces the fluid under pressure into the preform, thereby expanding the preform towards the inner surface of the mold cavity and creating a resulting container; a first seal that is selectively coupled between the blowing injector and the preform finish; and a second seal that is selectively coupled between the blow nozzle and an adjacent element.
    [0065] In some embodiments, the adjacent element comprises an upper surface of the preform support ring, so that the second sealing coupling is located between the blowing injector and the upper surface of the preform support ring . In some embodiments, the adjacent element comprises the mold, so that the second sealing coupling is located between the blow nozzle and the mold.
    [0066] In some embodiments, the system may comprise a third sealing coupling located between a lower surface of the support ring and the mold. In some embodiments, the third seal coupling comprises a fluid seal that generally prevents fluid flow between the lower surface of the support ring and the mold in response to mechanical coupling of the lower surface of the support ring and the mold .
    [0067] In some embodiments, the first sealing coupling device comprises a fluidic seal that generally prevents the flow of fluid between the blowing injector and the upper part of the preform finish in response to the mechanical coupling of the blow gun with the top of the preform finish.
    [0068] In some embodiments, the second seal coupling comprises a fluid seal that generally prevents fluid flow between the blow nozzle and the adjacent element in response to mechanical coupling of the blow nozzle with the adjacent element.
    [0069] In some embodiments, the system may comprise ventilation means for venting air into the preform before, during or after the introduction of fluid into the preform, the ventilation means being positioned upstream of the first coupling seal along a fluid path extending from the pressure system to the preform.
    [0070] In some embodiments, the system may comprise ventilation means for venting air within the preform before, during or after introducing fluid into the preform, the ventilation means being positioned between the first seal coupling and the second seal coupling along the fluid path.
    [0071] In some embodiments, the system may comprise a draw rod system having a movable draw rod slidably between an extended position and a retracted position, the draw rod operable to selectively couple and stretch the preform before or during fluid introduction; and ventilation means for venting air within the preform before, during or after introducing fluid into the preform, the ventilation means being positioned within the drawing rod. In some embodiments, the ventilation means positioned within the drawing rod comprises a central hole which extends within the drawing rod.
    [0072] In some embodiments, the ventilation system may comprise means for venting air into the preform before, during or after introducing fluid into the preform; and means for introducing inert gas to introduce inert gas into the preform to displace the air, the displaced air being vented through the ventilation means. In some embodiments, the system may comprise a draw rod system having a draw rod movable slidably between an extended position and a retracted position, the draw rod operable to selectively couple and stretch the preform before or during introduction of the fluid, the drawing rod having a central hole, in which the displaced air is vented through the central hole.
    [0073] In some embodiments, the system may comprise a back pressure system operatively coupled between the first seal coupling and the second seal coupling, the back pressure system applying a back pressure generally equal to a pressure within the preform during introduction of fluid. In some embodiments, the back pressure is in the range of about 1 MPa to about 6 MPa (10 bar to about 60 bar). In some embodiments, the back pressure is around 4 MPa (40 bar).
    [0074] In some embodiments, the system may comprise a valve system operatively coupled to the back pressure system, the valve system being closed during introduction of fluid into the preform, the valve system being open after introducing fluid into the preform to remove residual liquid from a volume between the first seal coupling and the second seal coupling.
    [0075] In some embodiments, the system may comprise a suction port system operatively coupled between the first seal coupling and the second seal coupling, the suction port system applying sufficient vacuum to remove residual liquid from a volume between the first seal coupling and the second seal coupling. In some embodiments, the suction port system comprises only a single port coupled between the first seal coupling and the second seal coupling. In some embodiments, the suction port system applies sufficient vacuum to remove residual liquid from the volume only after the blow nozzle is removed from the preform finish, thereby selectively uncoupling the first seal coupling. In some embodiments, the suction port system applies sufficient vacuum to remove residual liquid or air from the volume while the first seal coupling and the second seal coupling are selectively coupled. In some embodiments, the suction port system comprises a plurality of ports coupled between the first seal coupling and the second seal coupling. In some embodiments, the plurality of doors comprises at least one entrance door and at least one exit door.
    [0076] According to some embodiments, the teachings of the present invention provide a system for molding a container from a preform, in which the preform has a finish and a support ring. The system includes a mold that has a mold cavity that defines an internal surface and adapted to accept the preform; a pressure system having an inlet and an outlet, the pressure system expelling fluid; a blowing injector that receives the fluid from the pressure system that defines a fluid path within the preform and introduces the fluid under pressure into the preform, thereby expanding the preform towards the inner surface of the cavity mold and creating a resulting container; and a ventilation means for venting the air within the preform before, during or after introducing the fluid into the preform.
    [0077] In some embodiments, the system may comprise a first seal coupling capable of coupling between the blow nozzle and the preform finish, in which the ventilation means is located upstream of the first seal coupling along the fluid path.
    [0078] In some embodiments, the system may comprise a second seal coupling capable of coupling between the blowing injector and an adjacent resource, in which the ventilation means is located between the first seal coupling and the second seal coupling to the along the fluid path.
    [0079] In some embodiments, the adjacent feature comprises an upper surface of the preform support ring, so that the second sealing coupling is located between the blow nozzle and the upper surface of the preform support ring .
    [0080] In some embodiments, the adjacent feature comprises the mold, so that the second sealing coupling is located between the blow nozzle and the mold.
    [0081] In some embodiments, the adjacent feature comprises a draw rod system having a draw rod movable slidably between an extended position and a retracted position, the draw rod operable to selectively couple and stretch the preform before or during fluid introduction, where the ventilation medium is located inside the drawing rod. In some embodiments, the ventilation means located within the drawing rod comprises a central hole which extends within the drawing rod.
    [0082] The preceding description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention. Individual elements or features of a particular embodiment are generally not limited to this particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. It can also be varied in many ways. Such variations should not be considered as departing from the scope of the invention and all such modifications are intended to be included within the scope of the invention. rn
    权利要求:
    Claims (14)
    [0001]
    1. System (10) for molding a container from a preform (100), the preform (100) having a finish (112) and a support ring (102), the system comprising: a mold having a mold cavity that defines an internal surface and adapted to accept the preform (100); a pressure system that has an inlet and an outlet, the pressure system releasing fluid, in which the fluid is a liquid commodity (L); a blowing injector (22) receiving the fluid from the pressure system and introducing the fluid under pressure into the preform (100) in order to expand the preform (100) towards the inner surface of the mold cavity and creating a resulting container; a first seal coupling capable of selective coupling between the blow nozzle (22) and the finish of the preform (100); and a second seal coupling capable of selective coupling between the blow nozzle (22) and an adjacent feature, wherein the adjacent feature comprises an upper surface of the support ring (102) of the preform (100) so that the second sealing coupling is located between the blow nozzle (22) and the upper surface of the support ring (102) of the preform (100) or where the adjacent feature comprises the mold so that the second sealing coupling is located between the blow injector (22) and the mold, characterized by the fact that the system (10) still comprises a suction port system operatively coupled between the first seal coupling and the second seal coupling, the suction port applying sufficient vacuum to remove residual liquid from a volume between the first seal coupling and the second seal coupling.
    [0002]
    2. System (10), according to claim 1, characterized by the fact that it comprises a sealing configuration between the blowing injector (22) and the preform (100), hermetically sealing the upper part of the preform (100) during the molding and filling phase and the upper and / or lower part of the support ring to prevent or at least minimize the leakage of liquid into the mold and / or along the outside of the preform (100) before molding and filling the container.
    [0003]
    3. System according to claim 1, characterized by the fact that it further comprises: a third sealable coupling that can be coupled between a lower surface of the support ring (102) and the mold.
    [0004]
    System (10) according to claim 3, characterized in that the third sealing coupling comprises a fluidic seal (75) which generally inhibits the flow of fluid between the lower surface of the support ring (102) and the mold in response to mechanical coupling of the lower surface of the support ring (102) and the mold.
    [0005]
    5. System (10) according to claim 1, characterized in that the first sealing coupling comprises a fluidic seal (71) generally inhibiting the flow of fluid between the blow nozzle (22) and the upper part of the preform finish (100) in response to mechanical coupling of the blow nozzle (22) with the upper part of the preform finish (100) and / or where the second sealing coupling device comprises a fluid seal generally to inhibit the flow of fluid between the blowing injector (22) and the adjacent resource in response to mechanical coupling of the blowing injector (22) with the adjacent resource.
    [0006]
    6. System, according to claim 1, characterized by the fact that it also comprises: ventilation means for the ventilation of air inside the preform (100), before, during, or after the introduction of the fluid inside the pre -mold (100), the ventilation means being positioned upstream of the first seal coupling along a fluid path extending from the preform pressure system (100).
    [0007]
    7. System, according to claim 1, characterized by the fact that it also comprises: ventilation means for the ventilation of air inside the preform (100), before, during, or after the introduction of the fluid inside the pre -mold (100), the ventilation means being positioned between the first sealing coupling device and the second sealing coupling device along the fluid path.
    [0008]
    8. System according to claim 1, characterized by the fact that it further comprises: a drawing rod system having a drawing rod (28) slidably movable between an extended position and a retracted position, the drawing rod (28) operable to selectively engage and stretch the preform (100) before or during the introduction of the fluid; and ventilation means for air ventilation inside the preform (100), before, during, or after the introduction of the fluid into the preform (100), the ventilation means being positioned inside the drawing rod ( 28).
    [0009]
    9. System (10) according to claim 8, characterized by the fact that the ventilation means arranged 5/1 inside the stretching rod (28) comprises a central hole (30) that extends inside the rod stretching (28).
    [0010]
    10. System (10), according to claim 1, characterized by the fact that it also comprises: ventilation means for the ventilation of air inside the preform (100), before, during, or after the introduction of the fluid inside the preform (100); and means for introducing inert gas, to introduce an inert gas into the preform (100) to move the air, the displaced air being vented through the ventilation means.
    [0011]
    11. System (10), according to claim 1, characterized by the fact that it further comprises: a back pressure system operatively coupled between the first sealing coupling device and the second sealing coupling device, the back pressure system applying a back pressure generally equal to a pressure inside the preform (100) during the introduction of the fluid.
    [0012]
    12. System (10), according to claim 11, characterized by the fact that it further comprises: a valve system operatively coupled to the back pressure system, the valve system being closed during the introduction of the fluid into the preform (100), the valve system being opened after introducing the fluid into the preform (100) to remove residual liquid from a volume between the first seal coupling and the second seal coupling.
    [0013]
    13. System according to claim 1, characterized in that the suction port system comprises only a single port (120) coupled between the first sealing coupling and the second sealing coupling or a plurality of doors (120 , 122) coupled between the first seal coupling and the second seal coupling.
    [0014]
    14. Method for molding a container from a preform (100), the preform (100) having a finish and a support ring (102), the method comprising the steps of: positioning the preform (100) in a mold having a mold cavity defining an internal surface and adapted to accept the preform; use a blowing injector (22) to introduce a fluid under pressure into the preform (100), thereby expanding the preform towards the inner surface of the mold cavity and creating a resulting container, the fluid being a liquid goods (L); the method further comprising, before the use of the blowing injector (22) to introduce fluid into the preform, the step of coupling a first sealing coupling between the blowing injector and the finishing of the preform; and the step of selectively coupling a second seal coupling between the blow nozzle and an adjacent feature, wherein the adjacent feature comprises an upper surface of the support ring (102) of the preform so that the second seal coupling is located between the blow gun and the upper surface of the preform support ring or where the adjacent feature comprises the mold so that the second sealing coupling is located between the blow gun and the mold, characterized by the fact that which method comprises a step of using a suction port system operatively applying a sufficient vacuum to remove residual liquid from the volume between the first seal coupling and the second seal coupling.
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    同族专利:
    公开号 | 公开日
    EP2794230B1|2018-05-09|
    US20130164404A1|2013-06-27|
    US8827688B2|2014-09-09|
    WO2013096609A1|2013-06-27|
    BR112014015428A2|2017-06-13|
    EP2794230A1|2014-10-29|
    BR112014015428A8|2017-07-04|
    CN104039526A|2014-09-10|
    EP2794230A4|2015-10-28|
    CN104039526B|2017-08-08|
    JP2015506288A|2015-03-02|
    JP6124920B2|2017-05-10|
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    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-08| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-25| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-17| 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 20/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161578564P| true| 2011-12-21|2011-12-21|
    US61/578,564|2011-12-21|
    US13/721,291|2012-12-20|
    US13/721,291|US8827688B2|2011-12-21|2012-12-20|Sealing system for molding machine|
    PCT/US2012/070922|WO2013096609A1|2011-12-21|2012-12-20|A sealing system for molding machine|
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