• 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:

    公开号:SU1648244A3
    申请号:SU884356042
    申请日:1988-07-11
    公开日:1991-05-07
    发明作者:Хеглер Вильхельм；Хеглер Ральф-Петер
    申请人:Хеглер Вильхельм；
    IPC主号:
    专利说明:

    t
    i (21) 4356042/05 422) 07.07.88
    (31) p 3725286.0
    (32) 07/30/87 / (33) BE
    / (46) 07.05.91. Bul V 17
    (71) Wilhelm Hegler (DE)
    (72) Wilhelm Hegler and Ralf-Peter Hegler (DE)
    (53) 678.057 (088.8)
    (56) Patent of the USSR P 507209, cl. B 29 C 53/30, 1971.
    Patent of the USSR & 5386.55, cl. B 29 C 53/30, 1974.
    (54) DEVICE FOR THE MANUFACTURE OF PIPES WITH TRANSVERSE TRIMS FROM THERMOPLA- (PERSONAL POLYMER
    (57) The invention relates to equipment for the manufacture of tubular products from thermoplastic polymers by extrusion, in particular pipes with transverse ribs. The object of the invention is to improve the quality of the pipes produced by preventing the melt from flowing back and igniting it. The device contains a forming nozzle and placed in two opposing rows of mold half. The latter are mounted with the possibility that they form a closed form on the straight forming section. On the inner working surface of the mold, transverse ribs forming slots and molding grooves are made. The mold is driven by a displacement drive in a direction parallel to the longitudinal axis of the pipe in the zone of the forming section. The device is equipped with a casting core mounted with the formation of the working surface of the mold cavity. The core has a conical section that expands in the direction of movement of the mold and forms an expansion chamber with the forming cavity. After the injection core, a cooling mandrel is mounted in the direction of movement. The inner surface of the mold is made with stop ribs terminating in stop planes. The polymer melt from the nozzle enters the expansion chamber and the transverse stops forming the ribs. At the same time, only one edge is formed at the same time. As a result, the reverse flow of the melt and its ignition are eliminated. 11 hp f-ly, 9 ill.
    (L
    1C
    The invention relates to equipment for the manufacture of tubular products from thermoplastic polymers by extrusion, in particular pipes with transverse ribs.
    The aim of the invention is to improve the quality of manufactured pipes.
    by preventing the melt from flowing back and igniting it.
    Figure 1 shows the device, top view; figure 2 - the same, horizontal section, partial razez; 3-6 - the same, at different stages of production; 7-9 - ribbed tube with different annular protrusions, the section.
    A device for manufacturing tubes with transverse ribs comprises a frame 1 on which half-molds 2 and 2 are mounted, connected to each other, respectively, by chains 3 and 3. For this, on each half-mold 2 and 2 on its outer front in direction 4, the half-molds ( the working direction of the part is attached to the plate 5 by means of a bolt 6 that provides a hinge joint. The plate 5 is fixed in the corresponding place of the next half-form in the same way. The chains 3 and 3 thus formed in their initial (according to the working direction 4) parts pass through turning discs that perform the function of the inlet rollers 7. Separate mold halves 2 and 2 rotate chains 3 and 3L in accordance with the direction indicated by arrows 8 and 8, fall onto the forming section 9, on which the two half-molds 2 and 2 are combined into a pair of forms, with the shape pairs that follow one after the other in the working direction 4 are closely adjacent to one another. In order to quickly bring the molds 2 and 21 into a position in which they are arranged in parallel and adjacent to each other, closing rollers 10 are provided, which rapidly combine the rear ends in the working direction A of the half-molds; 2 and .. In the forming section 9, adjacent half-molds 2 and 2 are pressed by guide rollers 11, which are located in guide bars 12. Inlet rollers 7 are located on frame 1 with the possibility of their rotation around axis 13.
    On the front end of the frame 1 in the working direction 4, return rollers 14 serving as rotary disks are arranged in a similar manner, which can be rotated around axis 15, intended to turn chains 3 and 3 f and return them to the inlet rollers 7. As follows from FIG. The guide bars 12 with the guide rollers 11 correspond in length to several half-molds 2 and 2 and end up with no return to the return rollers 14, as a result of which the half-molds 2 and 2 can diverge, having one parallel
    differently and transversely with respect to the working direction 4 before they are retracted by the return rollers 14. On the upper side of the half-molds 2 and 2, the gear rims 16 are made, and both the gear rims 16 are in pairs of the combined half Lorm 2 and 21 coincide with each other in such a way that the common drive gear 17 can engage with the gear rims 16, as a result, the mold halves 2 and 21 can move through the forming section 9 in the form of a closed shape. The drive gear 17 is driven from the engine through drive gear 18 which is fixedly mounted on the shaft 19, on which the gear pinion 17 is also located. The shaft 19 is mounted on the bearing bracket 20, which through the remote prism 21 rests on the frame 1 and is rigidly connected to the latter bolts 22.
    Using the device, plastic pipes 23 are made with ribs 24 having the form of closed ring-shaped washers passing radially and over the entire outer surface of pipe 23. Such finned tubes have particularly high strength at peak pressures. The presence of an extruder is provided, from the molding nozzle 25 of which the melt of plastic 23a is extruded, in the liquid state it enters the form formed by the forming section 9, in which pipe 23 with ribs 24 is obtained.

    In the forming section 9, the pair-shaped half-molds 2 and 2 are cooled. For this, coolant channels 26 are provided. Made in half-molds 2 and 2a to form the molding cavity-27, the molding notches 28 also additionally have a special shape to form the outer shape of the pipe 23 with ribs 24. The notches 28 at the most radially extreme points have grooves or slots 29 for air to escape, which are adjacent to the air exhaust duct 30. This channel is connected to a partial vacuum device (not shown), whereby air is removed and the molding cavity 27 is completely filled with plastic forming the tube 23 with ribs 24.
    five
    The nozzle 25 is located in a zone in which the molds 2 and 2 are not yet fully connected into one form, surrounded by a heater 31, designed to maintain the desired level of temperature extruded and extruder and supplied through the nozzle 25 compressed melted plastic mass 23a. If polyvini chloride is used as plastic, this temperature is 195-200 ° C. At a short distance before the mold. the area, as well as a small distance in front of the zone in which the half-molds 2 and 2 fit snugly one to the other, the outer surface of the nozzle 25 expands to form a cylindrical outlet section 32. Between the radially located inside side 33 of the half-mold 2a 32, a safety gap 34 is provided to prevent the mold half 2a from contacting the cylindrical exit portion 32 of the forming nozzle 25. The width of the safety gap is in this case 0.3-0.8 mm.
    In the exit section 32 of the forming nozzle 25, a continuous outwardly expanding channel 35 for the melt is made, which is bounded from the inside by a casting core 36. At the exit of the channel 35 from the cylindrical output section 32 of the forming nozzle 25, as well as near the nozzle gap 37, an expansion chamber 38 is provided the length of which in the direction of movement of the mold (working direction 4) is equal to the distance between two adjacent slots of the formation of the ribs 24 or not more than 1.5 times its length.
    The injection core 36 has a conical section 39 adjacent to the nozzle gap 37, to which a second conical section 40 adjoins in the working direction 4. The first conical section -39 together with the middle longitudinal axis 41 of the forming nozzle 25 and, accordingly, the pipe 23 and the molding cavity 27 makes an angle of about 5 °. The second conical section 40 forms an angle of about 41 ° with the axis 41. The transition 42 of the injection core 36 of the nozzle area is rounded off in the first conical section 39. Per-
    6482446
    left conic section 39 and second
    0
    five
    0
    five
    0
    five
    0
    The conical section 40 together forms a forming slope 43, to which the cylindrical section 44 of the injection core 36 also abuts. On the injection core 36, namely on its cylindrical section 44, there is an internal calibrating mandrel 45, on the end surface of which in the working direction 4 a bowl-shaped view 46 is formed. provided with thermal insulation 47. Threaded fingers 48 are used to attach the internal calibrating mandrel 45 to the casting core 36. Calibrating mandrel 45 in the area adjacent to the cylindrical section 44 of the injection core 36 has a conical section 49 extending in the working direction 4, which is adjacent to the cylindrical section 50. The conical section 49 forms an angle of 3-4 ° with the axis 41.
    The casting core 36. as well as the inner calibrating horn 45 fixed on it are located on the holder 51 of the casting core 36 and are held on it by means of the eye nuts 52 on the thread 53 of the holder 51 of the injection core 36.
    Through the holder 51 of the injection core 36, the hollow cooling core 54 is concentric with respect to the axis 41, on which the cooling mandrel 55 is located. At the transition from the cylindrical section 50 of the calibrating mandrel 45 to the cooling mandrel 55, there is a conical nozzle 56 extending in the working direction 4, which forms with axis 41 an angle f of 3-4. Rest of
    the cooling mandrel 55 is made in the form of a cylinder. The gage dork 45 flatly abuts the annular
    the end side 57 of the casting core 36. The cooling mandrel 55 is coupled to the end surface with the adjacent end surface 58 of the inner calibrating mandrel 45.
    Thus, heat transfer occurs from the casting core 36 through the calibrating mandrel 45 to the cooling mandrel 55, and the heat flow is retained by the concave thermal insulation 47 in the calibrating mandrel 45, since the heat transfer cross-section in the annular cylindrical part 59 of the mandrel 45 is relatively small.
    The molding recess 28 of the half-molds 2 and 2a has cylindrical forming sections 60 of the outer pipe wall, which form the inner working surface 33 of the corresponding half-mold 2 or 2a, between which the ribs 61 are located at equal distances. The outer pipe wall forming sections 60 have stop ribs 62 that extend along the entire cylindrical perimeter of the molding section 60 and reach the corresponding annular protrusions 63 on the outer pipe wall.
    The stop ribs 62 on their back in the direction of the form (working direction 4) end with the stop planes 64 perpendicular to the axis 41. The other bounding surface 65 is flat with respect to the axis 41, which is slightly inclined in the direction of to the stop plane 64 next to the working direction 4 of the next stop rib 62.
    7 and 8, various annular protrusions 63, 63 and 63 are shown which correspond to the forming thrust ribs in the mold half 2a. Fig. 7 shows an annular protrusion 63 with a radially sloping thrust plane 6b, which corresponds to a thrust plane, which serves as a restriction of the adjacent slot of forming ribs. The stop plane 66 also extends perpendicularly to the middle longitudinal axis 41. This also applies to the stop planes 66 in the embodiments of FIGS. 8 and 9, Figure 7 shows that the transition to the flat-sloped face 68 is made with a rounding 69. Due to this rounding, stress concentration does not occur in the corresponding abutment edge of half-mold 2a.
    In the embodiment of FIGS. 8 and 9, the transition of the abutment plane 66 to the face 68 is made with a sharp edge. This provides a good resistance effect, but an undesirable concentration of stresses in the half-mold 2a occurs. In the embodiment of FIG. 9, the annular protrusions 63 have a smaller radial

    five
    0 Q
    five
    0
    five
    direction of height and lie at a smaller distance from each other. .
    The ribs 24 have a radial height h from the base of the abutment plane 66 and face 68, which is approximately equal to 0.035 i, where i is the internal diameter of the pipe 23. The minimum thickness in the pipe wall corresponds to approximately 0.015 i.The height of the annular protrusions 63 is about 0.12 B - 0.16 b.
    The production of the finned tube is carried out in three stages.
    In the first stage, the molten plastic 23a is squeezed under pressure through the gap 37 of the nozzle into the expansion chamber 38 at the beginning of the molding cavity 27. At the same time (FIG. 3), the transverse edge forming slot 61 located directly in front of the expansion chamber 38 in the working direction 4 is filled. The air in it exits through the air outlets 29, which are so narrow that no liquid melt enters them. When moving further than the half-mold 2a, the rib-forming slot 61 is completely filled (Fig. 4). After this stage is completed, the expansion chamber 38 is filled in, since with the process rate remaining unchanged in the working direction 4, i.e. at a constant speed of movement of the half-molds 2a, the molten plastic 23a is only used to produce cylindrical sections of the pipe wall 23. If the next edge formation slot 61 passes over the expansion chamber 38, the melt 23a falls into the edge formation slot 61 (Fig. 5). When moving the mold half 2a further, the forming slot 61 is filled, as a result of which the remaining rear section with respect to the mold mold 2a and to this transverse slot 61, the expansion chamber 38 is partially freed from the plastic melt. In sections 60 of the formation of the outer wall of the pipe, the melt is supercooled, as a result of which in this zone it is no longer liquid, but in flow. The stop planes 64 of the stop ribs 62 have a significant effect on the plastic. The ratio of the distance f between adjacent edges 24, i.e. adjacent transverse slots 61 of the formation of the ribs, the axial length g of the expansion chamber 38 is in the range from 1: 1 to 1: 1.5. In this zone, namely in its lower part, sequential filling through thrust ribs of individual slots 61 of the rib formation is ensured due to the intense melt flow of plastic 23a. At the end of the first stage, pipe 23 is already formed.
    The second stage of forming the pipe 23 is carried out by an internal calibrating mandrel 45, which has a mirror-polished surface for calibrating the still-warming and plastic properties of the pipe 23, resulting in a clean, smooth inner wall 67. In the second stage, the calibrating dronome 45 , partial cooling of the pipe 23 is carried out, and the surface area of the pipe, for example, at a depth of 0.1 mm is cooled to 50-60 ° C.
    In the third stage of manufacturing the tube 23, a cooling mandrel 55 is used, with which the tube 23 is accurately calibrated. The conical section 49 of the mandrel 45 and the tapered nozzle 56 of the cooling mandrel 55 are designed to provide a seamless transition of the pipe 23 to the corresponding transition section.
    Thus, only one edge 24 is formed per unit time, i.e. at the same time, the filling of several transverse ribs 61 does not occur. Only after the last slot 61 is filled with the melt, the next edge formation slot 61 passes through the expansion chamber 38. This eliminates the reverse flow of the melt and its ignition, with the result that pipes of improved quality are obtained.
    权利要求:
    Claims (12)
    [1]
    1. An apparatus for manufacturing tubes with transverse ribs of thermoplastic polymer, comprising a forming nozzle, arranged in two
    ,
    opposed rows of half molds, mounted with the possibility of forming a closed shape on a straight forming section, having
    Jq
    J5 2Q 25
    .. -
    35
    50
    55
    internal working surface with transverse ribs forming edges and molding grooves alternately formed by an outer tube forming section and edge shaping slots, a drive for moving the mold in a direction parallel to the longitudinal axis of the pipe in the area of the mold section, an injection core assembled with the working surface molds of the cavity n and having a conical area expanding in the direction of movement of the mold to the molding groove, forming with the molding groove an expansion chamber, a safety gap, located between the mold nozzle and the molding cavity in front of the expansion chamber, and placed after the injection core in the direction of movement of the form of cooling coils, in order to improve the quality of the pipes produced by preventing backflow the melt and its ignition, the inner working surface of the mold at the site of formation of the outer wall of the pipe is made with stop ribs ending in the direction of moving we thrust planes.
    [2]
    2. A device according to claim 1, characterized in that the stop planes are perpendicular to the longitudinal axis of symmetry of the molding cavity.
    [3]
    3. The device according to claim 1, characterized in that the height of the expansion chamber in front of the forming nozzle does not exceed twice the distance between the cooling mandrel
    and the inner working surface of the mold at the site of the molding grooves.
    [4]
    4. The device according to claim 1, characterized in that the height of the expansion chamber in front of the forming nozzle does not exceed one and a half times the distance between the cooling mandrel and the inner working surface of the mold in the area of the molding grooves.
    [5]
    5. The device according to claim 1, characterized in that the length of the expansion chamber in the direction of movement of the form is equal to the distance between two adjacent transverse slots of the formation of ribs or exceeds it by no more than 1.5 times.
    [6]
    6. A pop-1 device, characterized in that it is provided with an internal calibrating mandrel located between the molding core and the cooling mandrel.
    [7]
    7. A device according to n.f, characterized in that the cooling mandrel is coupled to the end surface of the internal calibrating mandrel.
    [8]
    8. The device according to claim 7, characterized in that a cup-shaped recess is made on the end surface of the internal calibrating mandrel on the side of the cooling mandrel.
    [9]
    9. A device according to claim 8, characterized in that the cup-shaped recess is provided with thermal insulation.
    0
    five
    0
    [10]
    10. A device according to claim 6, characterized in that the internal calibrating mandrel is interfaced with the end of the injection core.
    [11]
    11. The device according to claim 1, characterized in that the thrust ribs in the radially outer tone of the transition from the thrust planes to the plane and having a slope in the direction of movement of the shape of the edges are rounded.
    [12]
    12. The device according to claim 1, characterized in that the thrust ribs in the radially outer transition zone from the thrust planes to the flat ones having a slope
    in the direction of the shape movement, the edges are made with a sharp edge.
    No
    2 26 2a 33 29 Ј3 Ј5 27 24 59 47
    34 33 61 84 62 38
    37 35 42
    65 64 34 43 63 27 57 45 29 2a
    65 30 27
    29 2a 24
    V
    36 44 49 45 50
    Figz
    Phi1 Y
    V 62 60 29 63 36 27 2a 30 45
    5
    61 65 62 29 2a 36 30 27 45
    FIG €
    7
    Fig #
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1648244A3|1991-05-07|Device for manufacturing tubes with crosswise ribs from thermoplastic polymer
    KR900004432B1|1990-06-25|Extrusion dic for two-ply plastic tubing
    US3349156A|1967-10-24|Method for the production of corrugated tubes
    CA1199766A|1986-01-28|Method and apparatus for the formation of profiledthermoplastic film
    CA1314676C|1993-03-23|Pipe extrusion die with a cooled and vacuumed additional mandrel
    US3756758A|1973-09-04|Extrusion die for plastic film
    KR950000191B1|1995-01-11|Method and apparatus for the production of ribbed pipes
    FI74654B|1987-11-30|ANALYZING OVER FREQUENCY FRAMING PROCESSING.
    US5498150A|1996-03-12|High thermal capacity mold assembly
    US5472659A|1995-12-05|Method for continuously manufacturing compound corrugated pipe having smooth portions
    CA1070465A|1980-01-29|Apparatus for making variegated soap base
    US5069853A|1991-12-03|Method of configuring extrudate flowing from an extruder die assembly
    US3244781A|1966-04-05|Continuous extrusion and orientation of plastic tubing
    JPH0777765B2|1995-08-23|Method for producing a tube with smooth inside and ribs on the outside from an extrudable plastic and an apparatus for carrying out the method
    EP0834386A1|1998-04-08|Apparatus for producing double walled plastic pipes
    CN1041131A|1990-04-11|Production is had the equipment of circumferential rib tubing or the improvement of relevant devices
    US2688154A|1954-09-07|Device for extruding thin-walled tubing
    CA1312717C|1993-01-19|Cooling plugs in thermoplastic pipe forming apparatus
    US3784339A|1974-01-08|Disk extruder
    US4224272A|1980-09-23|Blow-molding nozzle and method
    CA2011321A1|1990-09-03|Method for producing spiral pipes with rib and apparatus therefor
    SU1163801A3|1985-06-23|Method of manufacturing thick-walled seamless rigid pipe from unoriented semicrystalline thermoplastic polymer and device for effecting same
    EP0380612B1|1992-04-29|A device for producing a grate construction and a grate construction
    US6210617B1|2001-04-03|Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe
    RU64131U1|2007-06-27|DEVICE FOR MANUFACTURING POLYMER SEALING PROFILES
    同族专利:
    公开号 | 公开日
    EP0301189B1|1993-05-12|
    EP0301189A2|1989-02-01|
    EP0301189A3|1990-09-05|
    BR8803766A|1989-02-21|
    US4900503A|1990-02-13|
    CN1031047A|1989-02-15|
    JPH0624736B2|1994-04-06|
    CN1012721B|1991-06-05|
    EP0301189B2|1998-08-26|
    DE3880909D1|1993-06-17|
    FI883531A|1989-01-31|
    CA1314678C|1993-03-23|
    DE3725286A1|1989-02-09|
    JPS6442210A|1989-02-14|
    ES2040288T3|1993-10-16|
    FI883531A0|1988-07-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4414977A1|1994-04-29|1995-11-02|Wilhelm Hegler|Device for the production of pipes made of thermoplastic material with cross-profiling|LU37257A1|1959-02-21|1900-01-01|
    FR1413172A|1959-02-21|1965-10-08|Fraenk Isolierrohr & Metall|Device for manufacturing plastic pipes with transverse corrugated walls|
    DE2061027C3|1970-12-11|1982-03-04|Wilhelm 8730 Bad Kissingen Hegler|Device for applying a transverse profile to a pipe made of thermoplastic material|
    US3891007A|1972-07-03|1975-06-24|Dayco Corp|Exteriorly corrugated hose of composite materials|
    SE381001B|1973-10-22|1975-11-24|Erik G W Nordstroem|PROCEDURE AND DEVICE FOR THE MANUFACTURE OF PLASTIC CAMPLANGES|
    DE2362444C2|1973-12-15|1983-06-01|Reifenhäuser KG, 5210 Troisdorf|Device for producing a pipe made of thermoplastic material with external ribs and a smooth internal channel|
    US4319872A|1976-12-01|1982-03-16|Lupke Gerd Paul Heinrich|Apparatus for producing thermoplastic tubing|
    FR2424123B1|1978-04-24|1980-10-31|Armosig|
    DE2832350A1|1978-07-22|1980-01-31|Wilhelm Hegler|DEVICE FOR PRODUCING PIPES FROM THERMOPLASTIC PLASTIC WITH CROSS-PROFILING|
    JPS5835453B2|1980-03-19|1983-08-02|Mitsui Toatsu Guriin Shisetsu Kk|
    DE3120480A1|1981-05-22|1982-12-09|Hegler, Wilhelm, 8730 Bad Kissingen|DEVICE FOR PRODUCING PLASTIC PIPES WITH CROSS-GROOVE|
    SE449456B|1983-11-15|1987-05-04|Uponor Ab|PROCEDURE AND DEVICE FOR MANUFACTURE OF RODS WHERE THE FORM BACK PARTS ARE DIVIDED IN THE LONG DIRECTION OF THE FORM|
    DE3513708C2|1985-04-12|1994-04-21|Drossbach Gmbh & Co Kg|Extrusion head for producing double-walled plastic pipes with cylindrical inner pipe and cross-corrugated outer pipe|
    FI74654C|1986-01-13|1988-03-10|Uponor Nv|ANALYZING OVER FREQUENCY FRAMING PROCESSING.|
    FI77405C|1986-03-20|1989-03-10|Uponor Nv|Method and apparatus for producing cam flange tubes.|CA1298450C|1988-09-16|1992-04-07|Manfred A. A. Lupke|Suction applying molded blocks in pipe forming apparatus|
    CA1303315C|1988-09-16|1992-06-16|Manfred A.A. Lupke|Apparatus for producing pipe with annular ribs|
    EP0453647B1|1990-04-27|1994-02-23|REHAU AG + Co|Method of manufacturing profiled elements|
    DE3921075A1|1989-06-28|1991-01-03|Wilhelm Hegler|PLASTIC TUBE FOR PIPE RENOVATION|
    FI85239C|1989-07-12|1992-03-25|Uponor Nv|Apparatus for producing cam flange tubes|
    DE4111229A1|1991-04-08|1992-10-15|Wilhelm Hegler|DEVICE FOR PRODUCING PLASTIC TUBES|
    DE4111228A1|1991-04-08|1992-10-15|Wilhelm Hegler|DEVICE FOR PRODUCING PLASTIC TUBES|
    US5141697A|1991-04-29|1992-08-25|Miner Enterprises, Inc.|Method of making a segmented polymer energy absorption device|
    CA2089183C|1991-06-14|2000-12-05|Manfred A. A. Lupke|Travelling mold tunnel apparatus for smooth walled pipe|
    DE4129855C2|1991-09-07|1999-09-16|Wilhelm Hegler|Process for welding pipes made of thermoplastic material|
    GB9212684D0|1992-06-15|1992-07-29|Lupke Manfred Arno Alfred|A method and apparatus for forming profiled tubes|
    DE4224514A1|1992-07-24|1994-01-27|Wilhelm Hegler|Device for producing a plastic tube with cross-profiling|
    JP2744743B2|1992-12-28|1998-04-28|日本金銭機械株式会社|Paper sheet identification device|
    US5545369A|1993-09-08|1996-08-13|Corma, Inc.|Clamshell corrugators and the like|
    DE19504501A1|1995-02-13|1996-08-14|Wilhelm Hegler|Process and plant for producing a multilayer pipe made of thermoplastic, in particular polyolefin|
    US5707088A|1995-08-28|1998-01-13|Contech Construction Products, Inc.|Joint for coupling plastic corrugated pipes|
    DE19535231A1|1995-09-22|1997-03-27|Hegler Ralph Peter|Device for the production of pipes made of thermoplastic material with cross-profiling|
    US5851476A|1996-05-17|1998-12-22|Miner Enterprises, Inc.|Method of manufacturing a bellowed seal|
    US5824351A|1996-07-05|1998-10-20|Lupke; Manfred A. A.|Molding apparatus with non-reflective mold tunnels|
    DE29809587U1|1997-03-12|1998-11-26|Lupke Manfred Arno Alfred|Device for molding plastic parts|
    US7104574B2|2000-01-20|2006-09-12|Uponor Eti Company|Corrugated pipe connection joint|
    US6877976B2|2002-09-09|2005-04-12|Manfred A. A. Lupke|Molding die for ribbed pipe|
    US7484535B2|2005-03-14|2009-02-03|Advanced Drainage Systems, Inc.|Corrugated pipe with outer layer|
    US8733405B2|2005-03-14|2014-05-27|Advanced Drainage Systems, Inc.|Corrugated pipe with outer layer|
    EP1954464B1|2005-11-16|2018-05-23|Manufacturing Systems Limited|Impropvements in or relating to forming apparatus|
    CA2622692C|2007-02-26|2015-10-06|Advanced Drainage Systems, Inc.|Defined ratio dual-wall pipe die|
    CA2622695C|2007-02-26|2015-11-03|Advanced Drainage Systems, Inc.|Pipe extrusion die flow path apparatus and method|
    WO2008153691A1|2007-05-23|2008-12-18|Advanced Drainage Systems, Inc.|An extruder ramp-up control system and method|
    US8820801B2|2007-11-16|2014-09-02|Advanced Drainage System, Inc.|Multi-wall corrugated pipe couplings and methods|
    US8820800B2|2007-11-16|2014-09-02|Advanced Drainage Systems, Inc.|Multi-wall corrugated pipe couplings and methods|
    US7988438B2|2008-02-11|2011-08-02|Advanced Drainage Systems, Inc.|Extrusion die vacuum seals|
    US8550807B2|2008-05-28|2013-10-08|Advanced Drainage Systems, Inc.|In-mold punch apparatus and methods|
    US8114324B2|2008-10-14|2012-02-14|Advanced Drainage Systems, Inc.|Apparatus and method for pressing an outer wall of pipe|
    DE102009035040B4|2009-07-28|2011-12-15|Ralph Peter Hegler|Process for the continuous production of a pipe and apparatus for carrying out the process|
    US8360140B2|2010-03-16|2013-01-29|Miner Elastomer Products Corporation|Well head lubricator assembly|
    CA2865601A1|2014-09-30|2016-03-30|Manfred A. A. Lupke|Mold block return|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19873725286|DE3725286A1|1987-07-30|1987-07-30|METHOD AND DEVICE FOR PRODUCING A RIB TUBE FROM PLASTIC|
    [返回顶部]