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    Injection molding methods, injection molding apparatus and injection nozzle devices for use in molding multiple-layer articles, and multiple-layer injection molded articles
    2.
    发明公开
    Injection molding methods, injection molding apparatus and injection nozzle devices for use in molding multiple-layer articles, and multiple-layer injection molded articles 失效
    注射成型法，注射成型装置及射流喷管装置的制造多层制品和多层注射成型制品。

    公开(公告)号：EP0312134A2

    公开(公告)日：1989-04-19

    申请号：EP88201950.8

    申请日：1984-04-11

    申请人： AMERICAN NATIONAL CAN COMPANY

    发明人： Kudert, Frederick G. ,  Latreille, Maurice G. ,  McHenry, Robert J. ,  Nahill, George F. ,  Pfutzenreuter, Henry, III ,  Tennant, William A. ,  Tung, Thomas T. ,  Vella, John, Jr.

    IPC分类号： B29C45/16 ,  B29C45/76 ,  B29C49/22 ,  B29B11/08 ,  B65D1/40

    CPC分类号： B65D1/28 ,  B29B2911/14053 ,  B29B2911/14066 ,  B29B2911/1408 ,  B29B2911/14093 ,  B29B2911/1412 ,  B29B2911/1442 ,  B29B2911/14986 ,  B29C45/1607 ,  B29C45/1643 ,  B29C47/0009 ,  B29C47/061 ,  B29C49/22 ,  B29C2045/161 ,  B29C2045/1612 ,  B29K2105/26 ,  B29K2995/0069 ,  B29L2031/716

    摘要： For co-molding a plurality of articles from a plurality of polymeric materials, a preferred molding apparatus has a plurality of valve-controlled co-injection nozzles (296) and injection cavities (102). The polymeric materials (A to E) are melted and fed from their sources (202, 204, 206) by screw extruders (214, 216, 218) to a set of rams (232, 234, 252, 260, 262) which appropriately pressurize and move streams of the polymeric materials to feed blocks (296) each associated with or forming part of a respective nozzle (296) for injection into the related cavity (102). The streams leaving the rams (232, 234, 252, 260, 262) are conveyed along respective runner ducts (220, 222, 250, 257, 258) to a runner extension member (276) in a runner block (288), and in the runner extension each material stream is divided into a plurality of branch streams. Each branch stream is ducted to flow splitters in the runner block (288) for further division into plural feed streams equal in number to the number of nozzles (296), and the separate feed streams are then fed one to each nozzle (296). The apparatus is configured such that for each material, the plural feed streams reach their respective nozzles (296) after passage along ductings of the same length and geometry to ensure that the streams enter their nozzles as nearly as possible in the same condition, ready for injection. Each nozzle (296) receives the polymeric materials (A to E) as separate feed streams and combines them appropriately into a plural-layer, plural-material stream for injection. The nozzles all have pin and sleeve valves (800, 834) to control admission and flow of the different materials to their central channels (240) wherein the combined stream is formed. Valve operation is under microprocessor control (2040) and the valves - which are effectively substantially identical - are coupled to common valve actuating cams (850, 856) for operation in unison, so that at any instant in the molding cycle the combined streams formed in the nozzles (296) for injection are as near as possible identical to one another. By appropriately controlling the pressures of the polymeric material streams and by appropriately controlling the timing of valve operating movements, precise control is obtainable whereby e.g. internal layers of the injected articles are positioned where best suited depending on the service required of the articles.
    The method and apparatus are applicable to the production of injection or injection blow molded articles such as container for commestibles and beverages.

    摘要翻译： 由聚合物材料的多个用于共同模制的物品复数，一个优选的模制装置具有阀控制的共注射喷嘴（296）和注射模腔（102）的复数。 聚合材料（A到E）被熔融并且用螺杆挤出机（214，216，218）供给从它们的源（202，204，206）与一组公羊（232,234，252，260，262）其中适当地 加压和移动至聚合材料的流进料块（296），每个或形成respectivement喷嘴（296），用于注射的部分进入空腔相关（102）相关联。 离开压头（232,234，252，260，262）的流被沿着respectivement浇道导管（220，222，250，257，258），以在流道块（288）一个转轮延伸构件（276）输送，并且 在流道延伸的每种材料流被分成支流的复数。 每个分支流被输送到流分离器在流道块（288），用于进一步划分成多个进料流在数目上等于喷嘴（296）的数量，然后将分开的进料流被送入一个到每个喷嘴（296）。 所述装置被配置为每种材料搜索那样，多个进料流沿相同的长度和几何形状的ductings通过后达到其respectivement喷嘴（296），以确保DA​​SS死流在相同的条件下，近输入他们的喷嘴成为可能，准备用于 注射。 每个喷嘴（296）接收所述聚合材料（A至E）作为单独的进料流，并适当地结合了它们变成复数层时，多个材料流用于注射。 喷嘴都具有销和套筒阀（800，834）worin组合流被形成为控制所述不同材料的接纳和流动到其中央通道（240）。 瓣膜手术是微处理器控制（2040）和阀下 - 这是有效地基本上相同 - 被耦合到手术一致地共同气门致动凸轮（850，856），作为在模制周期中的任何时刻在形成的组合流做 用于注射的喷嘴（296）是尽可能靠近彼此相同。 通过适当地控制所述聚合物材料流，并且通过适当控制的气门操作动作的定时的压力，精确控制是可获得的，由此E.G. 注射制品内层视条款所要求的服务定位在最适合的。 该方法和装置适用于生产注射或注射吹塑制品的：诸如用于commestibles和饮料容器。

    Injection molding methods and products made by the methods
    4.
    发明公开
    Injection molding methods and products made by the methods 失效
    注塑方法和由该方法制造的产品

    公开(公告)号：EP0311160A3

    公开(公告)日：1989-10-18

    申请号：EP88201953.2

    申请日：1984-04-11

    申请人： AMERICAN NATIONAL CAN COMPANY

    发明人： Kudert, Frederick G. ,  Latreille, Maurice G. ,  McHenry, Robert J. ,  Nahill, George F. ,  Pfutzenreuter, Henry, III ,  Tennant, William A. ,  Tung, Thomas T. ,  Vella, John, Jr.

    IPC分类号： B29C45/16 ,  B29C45/76 ,  B29C49/22 ,  B29B11/08 ,  B65D1/40

    CPC分类号： B29C49/0073 ,  B29B2911/14053 ,  B29B2911/14066 ,  B29B2911/1408 ,  B29B2911/14086 ,  B29B2911/14093 ,  B29B2911/14113 ,  B29B2911/1412 ,  B29B2911/14326 ,  B29B2911/14331 ,  B29B2911/14333 ,  B29B2911/14336 ,  B29B2911/14337 ,  B29B2911/14366 ,  B29B2911/1442 ,  B29B2911/14426 ,  B29B2911/14493 ,  B29B2911/146 ,  B29B2911/14646 ,  B29B2911/14986 ,  B29C45/1607 ,  B29C45/1643 ,  B29C47/0009 ,  B29C47/061 ,  B29C49/22 ,  B29C2045/161 ,  B29C2045/1612 ,  B29K2105/26 ,  B29K2995/0069 ,  B29L2031/716 ,  B65D1/28

    摘要： For co-molding a plurality of articles from a plurality of polymeric materials, a preferred molding apparatus has a plurality of valve-controlled co-injection nozzles (296) and injection cavities (102). The polymeric materials (A to E) are melted and fed from their sources (202, 204, 206) by screw extruders (214, 216, 218) to a set of rams (232, 234, 252, 260, 262) which appropriately pressurize and move streams of the polymeric materials to feed blocks (296) each associated with or forming part of a respective nozzle (296) for injection into the related cavity (102). The streams leaving the rams (232, 234, 252, 260, 262) are conveyed along respective runner ducts (220, 222, 250, 257, 258) to a runner extension member (276) in a runner block (288), and in the runner extension each material sream is divided into a plurality of branch streams. Each branch stream is ducted to flow splitters in the runner block (288) for further division into plural feed streams equal in number to the number of nozzles (296), and the separate feed streams and then fed one to each nozzle (296). The apparatus is configured such that for each material, the plural feed streams reach their respective nozzles (296) after passage along ductings of the same length and geometry to ensure that the streams enter their nozzles as nearly as possible in the same condition, ready for injection. Each nozzle (296) receives the polymeric materials (A to E) as separate feed streams and combines them appropriately into a plural-layer, plural-material stream for injection. The nozzles all have pin and sleeve valves (800, 834) to control admission and flow of the different materials to their central channels (240) wherein the combined stream is formed. Valve operation is under microprocessor control (2040) and the valves - which are effectively substantially identical - are coupled to common valve actuating cams (850, 856) for operation in unison, so that at any instant in the molding cycle the combined streams formed in the nozzles (296) for injection are as near as possible identical to one another. By appropriately controlling the pressures of the polymeric material streams and by appropriately controlling the timing of valve operating movements, precise control is obtainable whereby e.g. internal layers of the injected articles are positioned where best suited depending on the service required of the articles. The method and apparatus are applicable to the production of injection or injection blow molded articles such as containers for commestibles and beverages.

    摘要翻译： 为了从多种聚合物材料共同模塑多个制品，优选的模塑设备具有多个阀控共注射喷嘴（296）和注射腔（102）。 将聚合物材料（A至E）熔化并通过螺杆挤出机（214,216,218）从其来源（202,204,206）供应到适当的柱塞（232,234,252,260,262） 将聚合物材料流加压并移动到各自与相应的喷嘴（296）相关联或形成相应的喷嘴（296）的一部分的供料块（296）以供注入到相关腔体（102）中。 离开冲头（232,234,252,260,262）的流体沿着相应的流道管道（220,222,250,257,258）被传送到流道块（288）中的流道延伸构件（276），并且 在流道延长线中，每个材料流被分成多个分支流。 每个分支流被导管以使流道块（288）中的分流器流动，以进一步划分为数量与喷嘴（296）的数量相等的多个供给流以及单独的供给流并且然后将一个供给到每个喷嘴（296）。 该装置被构造成使得对于每种材料，在沿着相同长度和几何形状的管道通过之后，多个进料流到达它们各自的喷嘴（296），以确保物流尽可能在相同条件下进入它们的喷嘴，准备好 注射。 每个喷嘴（296）接收作为分开的进料流的聚合物材料（A至E），并将它们适当地组合成多层多材料物流用于注射。 这些喷嘴都具有销阀和套筒阀（800,834），以控制不同材料进入其中心通道（240）的进入和流动，其中形成组合流。 阀操作处于微处理器控制（2040）下，并且实际上基本上相同的阀连接到共同的阀动作凸轮（850,856）以便一致操作，使得在模制循环的任何时刻组合的流形成 用于喷射的喷嘴（296）尽可能地彼此相同。 通过适当地控制聚合物材料流的压力并通过适当地控制阀操作运动的时间，可以获得精确的控制，由此例如 注入物品的内层根据物品所需的服务而定位在最合适的位置。 该方法和装置适用于制造注塑或注塑吹塑制品，例如用于食品和饮料的容器。

    Co-injection nozzle devices and methods for use in molding multiple-layer articles and articles made by the methods
    5.
    发明公开
    Co-injection nozzle devices and methods for use in molding multiple-layer articles and articles made by the methods 失效
    喷射器装置和用于制造多层制品的方法，并用产生的这种方法，多层制品。

    公开(公告)号：EP0307058A2

    公开(公告)日：1989-03-15

    申请号：EP88201951.6

    申请日：1984-04-11

    申请人： AMERICAN NATIONAL CAN COMPANY

    发明人： Kudert, Frederick G. ,  Latreille, Maurice G. ,  McHenry, Robert J. ,  Nahill, George F. ,  Pfutzenreuter, Henry, III ,  Tennant, William A. ,  Tung, Thomas T. ,  Vella, John Jr.

    IPC分类号： B29C45/16 ,  B29C45/76 ,  B29C49/22 ,  B29B11/08 ,  B65D1/40

    CPC分类号： B29C49/0073 ,  B29B2911/14053 ,  B29B2911/14066 ,  B29B2911/1408 ,  B29B2911/14086 ,  B29B2911/14093 ,  B29B2911/14113 ,  B29B2911/1412 ,  B29B2911/14326 ,  B29B2911/14331 ,  B29B2911/14333 ,  B29B2911/14336 ,  B29B2911/14337 ,  B29B2911/14366 ,  B29B2911/1442 ,  B29B2911/14426 ,  B29B2911/14493 ,  B29B2911/146 ,  B29B2911/14646 ,  B29B2911/14986 ,  B29C45/1607 ,  B29C45/1643 ,  B29C47/0009 ,  B29C47/061 ,  B29C49/22 ,  B29C2045/161 ,  B29C2045/1612 ,  B29K2105/26 ,  B29K2995/0069 ,  B29L2031/716 ,  B65D1/28

    摘要： For co-molding a plurality of articles from a plurality of polymeric materials, a preferred molding apparatus has a plurality of valve-controlled co-injection nozzles (296) and injection cavities (102). The polymeric materials (A to E) are melted and fed from their sources (202, 204, 206) by screw extruders (214, 216, 218) to a set of rams (232, 234, 252, 260, 262) which appropriately pressurize and move streams of the polymeric materials to feed blocks (296) each associated with or forming part of a respective nozzle (296) for injection into the related cavity (102). The streams leaving the rams (232, 234, 252, 260, 262) are conveyed along respective runner ducts (220, 222, 250, 257, 258) to a runner extension member (276) in a runner block (288), and in the runner extension each material stream is divided into a plurality of branch streams. Each branch stream is ducted to flow splitters in the runner block (288) for further division into plural feed streams equal in number to the number of nozzles (296), and the separate feed streams are then fed one to each nozzle (296). The apparatus is configured such that for each material, the plural feed streams reach their respective nozzles (296) after passage along ductings of the same length and geometry to ensure that the streams enter their nozzles as nearly as possible in the same condition, ready for injection. Each nozzle (296) receives the polymeric materials (A to E) as separate feed streams and combines them appropriately into a plural-layer, plural-material stream for injection. The nozzles all have pin and sleeve valves (800, 834) to control admission and flow of the different materials to their central channels (240) wherein the combined stream is formed. Valve operation is under microprocessor control (2040) and the valves - which are effectively substantially identical - are coupled to common valve actuating cams (850, 856) for operation in unison, so that at any instant in the molding cycle the combined streams formed in the nozzles (296) for injection are as near as possible identical to one another. By appropriately controlling the pressures of the polymeric material streams and by appropriately controlling the timing of valve operating movements, precise control is obtainable whereby e.g. internal layers of the injected articles are positioned where best suited depending on the service required of the articles.
    The method and apparatus are applicable to the production of injection or injection blow molded articles such as containers for commestibles and beverages.

    摘要翻译： 由聚合物材料的多个用于共同模制的物品复数，一个优选的模制装置具有阀控制的共注射喷嘴（296）和注射模腔（102）的复数。 聚合材料（A到E）被熔融并且用螺杆挤出机（214，216，218）供给从它们的源（202，204，206）与一组公羊（232,234，252，260，262）其中适当地 加压和移动至聚合材料的流进料块（296），每个或形成respectivement喷嘴（296），用于注射的部分进入空腔相关（102）相关联。 离开压头（232,234，252，260，262）的流被沿着respectivement浇道导管（220，222，250，257，258），以在流道块（288）一个转轮延伸构件（276）输送，并且 在流道延伸的每种材料流被分成支流的复数。 每个分支流被输送到流分离器在流道块（288），用于进一步划分成多个进料流在数目上等于喷嘴（296）的数量，然后将分开的进料流被送入一个到每个喷嘴（296）。 所述装置被配置为每种材料搜索那样，多个进料流沿相同的长度和几何形状的ductings通过后达到其respectivement喷嘴（296），以确保DA​​SS死流在相同的条件下，近输入他们的喷嘴成为可能，准备用于 注射。 每个喷嘴（296）接收所述聚合材料（A至E）作为单独的进料流，并适当地将它们组合成多个层，多个材料流用于注射。 喷嘴都具有销和套筒阀（800，834）worin组合流被形成为控制所述不同材料的接纳和流动到其中央通道（240）。 瓣膜手术是微处理器控制（2040）和阀下 - 这是有效地基本上相同 - 被耦合到手术一致地共同气门致动凸轮（850，856），作为在模制周期中的任何时刻在形成的组合流做 用于注射的喷嘴（296）是尽可能靠近彼此相同。 通过适当地控制所述聚合物材料流，并且通过适当控制的气门操作动作的定时的压力，精确控制是可获得的，由此E.G. 注射制品内层视条款所要求的服务定位在最适合的。 该方法和装置适用于生产注射或注射吹塑制品的：诸如用于commestibles和饮料的容器。

    Five layer injection molding apparatus having four position valve member actuating mechanism
    6.
    发明公开
    Five layer injection molding apparatus having four position valve member actuating mechanism 有权
    Ge den den den den den den den den den den den den den den den den den den den den den den

    公开(公告)号：EP0911134A2

    公开(公告)日：1999-04-28

    申请号：EP98120005.8

    申请日：1998-10-22

    申请人： MOLD-MASTERS LIMITED

    发明人： Gellert, Jobst Ulrich ,  Babin, Denis L.

    IPC分类号： B29C45/16

    CPC分类号： B29C45/1607 ,  B29C2045/1612 ,  B29C2045/1648 ,  B29C2045/273 ,  B29C2045/2872 ,  B29K2105/253

    摘要： Valve gated multi-cavity injection molding apparatus for five layer molding having actuating mechanisms for reciprocating elongated valve members between four different positions. Each actuating mechanism has a front and a rear aligned cylinders, a first piston connected to the head of one of the valve members in the front cylinder and second and third pistons in the rear cylinder. The third piston has a stem portion which extends forwardly through the second piston into the front cylinder. Hydraulic pressure from four hydraulic lines connected to each actuating mechanism reciprocates each elongated valve member between the different positions. In the first closed position, the front end of the valve member is seated in the gate. In the second position, the front end of the valve member is retracted sufficiently to allow an initial amount of PET to flow from an outer annular melt channel through the gate. Then the valve member is retracted further to a third position to allow simultaneous flow of the PET and a barrier material from an inner annular melt channel. Then the valve member is retracted to a fully open position which allows the simultaneous flow of PET from a central melt channel. When the cavity is almost filled, the valve member returns briefly to the second position for filling before returning to the closed position for ejection.

    摘要翻译： 用于五层模制的阀门浇口多腔注射成型装置，其具有用于在四个不同位置之间的往复式细长阀构件的致动机构。 每个致动机构具有前和后对齐的气缸，第一活塞连接到前气缸中的一个阀构件的头部以及后气缸中的第二和第三活塞。 第三活塞具有杆部，其向前延伸穿过第二活塞进入前缸。 连接到每个致动机构的四个液压管路的液压压力使每个细长阀构件在不同位置之间往复运动。 在第一关闭位置，阀构件的前端位于门中。 在第二位置，阀构件的前端充分收回以允许初始量的PET从外部环形熔体通道流过门。 然后阀构件进一步缩回到第三位置，以允许PET和阻挡材料从内部环形熔体通道同时流动。 然后阀构件缩回到完全打开的位置，允许从中心熔体通道同时流动PET。 当空腔几乎被填充时，阀构件在返回到关闭位置之前短暂返回到第二位置以进行填充。

    Injection molding methods, injection molding apparatus and injection nozzle devices for use in molding multiple-layer articles, and multiple-layer injection molded articles
    8.
    发明公开
    Injection molding methods, injection molding apparatus and injection nozzle devices for use in molding multiple-layer articles, and multiple-layer injection molded articles 失效
    注射成型法，注射成型装置及射流喷管装置的制造多层制品和多层注射成型制品。

    公开(公告)号：EP0306118A2

    公开(公告)日：1989-03-08

    申请号：EP88201952.4

    申请日：1984-04-11

    申请人： AMERICAN NATIONAL CAN COMPANY

    发明人： Kudert, Frederick G. ,  McHenry, Robert J. ,  Latreille, Maurice G. ,  Nahill, George F. ,  Pfutzenreuter III, Henry ,  Tung, Thomas T. ,  Tennant, William A. ,  Vella, John, Jr.

    IPC分类号： B29C45/16 ,  B29C45/76 ,  B29C49/22 ,  B29B11/08 ,  B65D1/40

    CPC分类号： B29C49/0073 ,  B29B2911/14053 ,  B29B2911/14066 ,  B29B2911/1408 ,  B29B2911/14086 ,  B29B2911/14093 ,  B29B2911/14113 ,  B29B2911/1412 ,  B29B2911/14326 ,  B29B2911/14331 ,  B29B2911/14333 ,  B29B2911/14336 ,  B29B2911/14337 ,  B29B2911/14366 ,  B29B2911/1442 ,  B29B2911/14426 ,  B29B2911/14493 ,  B29B2911/146 ,  B29B2911/14646 ,  B29B2911/14986 ,  B29C45/1607 ,  B29C45/1643 ,  B29C47/0009 ,  B29C47/061 ,  B29C49/22 ,  B29C2045/161 ,  B29C2045/1612 ,  B29K2105/26 ,  B29K2995/0069 ,  B29L2031/716 ,  B65D1/28

    摘要： For co-molding a plurality of articles from a plurality of polymeric materials, a preferred molding apparatus has a plurality of valve-controlled co-injection nozzles (296) and injection cavities (102). The polymeric materials (A to E) are melted and fed from their sources (202, 204, 206) by screw extruders (214, 216, 218) to a set of rams (232, 234, 252, 260, 262) which appropriately pressurize and move streams of the polymeric materials to feed block (296) each associated with or forming part of a respective nozzle (296) for injection into the related cavity (102). The streams leaving the rams (232, 234, 252, 260, 262) are conveyed along respective runner ducts (220, 222, 257, 258) to a runner extension member (276) in a runner block (288), and in the runner extension each material stream is divided into a plurality of branch streams. Each branch stream is ducted to flow splitters in the runner block (288) for further division into plural feed streams equal in number to the number of nozzles (296), and the separate feed streams are then fed one to each nozzle (296). The apparatus is configured such that for each material, the plural feed streams reach their respective nozzles (296) after passage along ductings of the same length and geometry to ensure that the streams enter their nozzles as nearly as possible in the same condition, ready for injection. Each nozzle (296) receives the polymeric materials (A to E) as separate feed streams and combines them appropriately into a plural-layer plural-material stream for injection. The nozzles all have pin and sleeve valves (800, 834) to control admission and flow of the different materials to their central channels (240) wherein the combined stream is formed. Valve operation is under microprocessor control (2040) and the valves - which are effectively substantially identical - are coupled to common valve actuating cams (850, 856) for operation in unison, so that at any instant in the molding cycle the combined streams formed in the nozzles (296) for injection are as near as possible identical to one another. By appropriately controlling the pressures of the polymeric material streams and by appropriately controlling the timing of valve operating movements, precise control is obtainable whereby e.g. internal layers of the injected articles are positioned where best suited depending on the service requires of the articles.
    The method and apparatus are applicable to the production of injection or injection blow molded articles such as containers for commestibles and beverages.

    摘要翻译： 由聚合物材料的多个用于共同模制的物品复数，一个优选的模制装置具有阀控制的共注射喷嘴（296）和注射模腔（102）的复数。 聚合材料（A到E）被熔融并且用螺杆挤出机（214，216，218）供给从它们的源（202，204，206）与一组公羊（232,234，252，260，262）其中适当地 聚合物材料的加压和移动流喂块（296），每个或形成respectivement喷嘴（296），用于注射的部分进入空腔相关（102）相关联。 离开压头（232,234，252，260，262）的流被沿着respectivement浇道导管（220，222，257，258），以在流道块（288）一个转轮延伸构件（276）输送，并且在 转轮延伸每种材料流被分成支流的复数。 每个分支流被输送到流分离器在流道块（288），用于进一步划分成多个进料流在数目上等于喷嘴（296）的数量，然后将分开的进料流被送入一个到每个喷嘴（296）。 所述装置被配置为每种材料搜索那样，多个进料流沿相同的长度和几何形状的ductings通过后达到其respectivement喷嘴（296），以确保DA​​SS死流在相同的条件下，近输入他们的喷嘴成为可能，准备用于 注射。 每个喷嘴（296）接收所述聚合材料（A至E）作为单独的进料流，并适当地将它们组合成一个复数层的多个材料流用于注射。 喷嘴都具有销和套筒阀（800，834）worin组合流被形成为控制所述不同材料的接纳和流动到其中央通道（240）。 瓣膜手术是微处理器控制（2040）和阀下 - 这是有效地基本上相同 - 被耦合到手术一致地共同气门致动凸轮（850，856），作为在模制周期中的任何时刻在形成的组合流做 用于注射的喷嘴（296）是尽可能靠近彼此相同。 通过适当地控制所述聚合物材料流，并且通过适当控制的气门操作动作的定时的压力，精确控制是可获得的，由此E.G. 注射制品内层定位在最适合根据服务条款的要求。 该方法和装置适用于生产注射或注射吹塑制品的：诸如用于commestibles和饮料的容器。

    Five layer injection molding apparatus having four position valve member actuating mechanism
    9.
    发明公开
    Five layer injection molding apparatus having four position valve member actuating mechanism 有权
    具有四个位置阀构件注射成型装置，用于制造五层的对象

    公开(公告)号：EP0911134A3

    公开(公告)日：2000-05-17

    申请号：EP98120005.8

    申请日：1998-10-22

    申请人： MOLD-MASTERS LIMITED

    发明人： Gellert, Jobst Ulrich ,  Babin, Denis L.

    IPC分类号： B29C45/16

    CPC分类号： B29C45/1607 ,  B29C2045/1612 ,  B29C2045/1648 ,  B29C2045/273 ,  B29C2045/2872 ,  B29K2105/253

    摘要： Valve gated multi-cavity injection molding apparatus for five layer molding having actuating mechanisms for reciprocating elongated valve members (12) between four different positions. Each actuating mechanism (122) has a front and a rear aligned cylinders, a first piston (124) connected to the head of one of the valve members in the front cylinder and second (128) and third (130) pistons in the rear cylinder (132). The third piston (130) has a stem portion (134) which extends forwardly through the second piston (128) into the front cylinder (126). Hydraulic pressure from four hydraulic lines (138,140) connected to each actuating mechanism (122) reciprocates each elongated valve member (12) between the different positions. In the first closed position, the front end of the valve member is seated in the gate (32). In the second position, the front end of the valve member is retracted sufficiently to allow an initial amount of PET to flow from an outer annular melt channel (66) through the gate (32). Then the valve member (12) is retracted further to a third position to allow simultaneous flow of the PET and a barrier material from an inner annular melt channel. Then the valve member is retracted to a fully open position which allows the simultaneous flow of PET from a central melt channel. When the cavity is almost filled, the valve member returns briefly to the second position for filling before returning to the closed position for ejection.