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    Process and mold for molding foamed plastic articles
    21.
    发明授权
    Process and mold for molding foamed plastic articles 失效
    用于模制泡沫塑料制品的工艺和模具

    公开(公告)号：US4479914A

    公开(公告)日：1984-10-30

    申请号：US438377

    申请日：1982-11-01

    申请人： Ervin J. Baumrucker

    发明人： Ervin J. Baumrucker

    IPC分类号： B29C44/10 ,  B29D27/00

    CPC分类号： B29C44/105 ,  Y10S264/83 ,  Y10S425/812

    摘要： A method for forming foamed plastic articles which includes the steps of closing a mold; prepressurizing the mold cavity with gas to prevent premature diffusion of blowing gas from the material injected into the cavity; injecting a short shot of molten synthetic resin material containing a blowing agent into the cavity; venting a portion of the prepressurization gas during the injection step; and venting the remaining prepressurization gas from the mold cavity to a vacuum chamber means to allow expansion of the injected foamable resin material within the mold cavity, the vacuum drawing the resin material throughout the mold cavity. In addition, the vacuum chamber is coupled to the mold cavity through plural spaced passageways so that the vacuum is drawn at various locations throughout the cavity to thereby enhance the complete filling of the cavity with the injected material as it expands. The mold is vented following the injection step automatically at the expiration of a predetermined time following the closing of a nozzle of the injection apparatus. A mold for carrying out the process includes improved gas flow means for delivering gas to and venting gas from the mold cavity. The mold also includes improved sealing means for sealing the mold to maintain it in a pressurized state as desired.

    摘要翻译： 一种用于形成泡沫塑料制品的方法，包括以下步骤：封闭模具; 用气体预压模具腔，以防止吹入气体从注入空腔的材料过早扩散; 将含有发泡剂的熔融合成树脂材料的短射射入腔体; 在注射步骤期间排出一部分预加压气体; 以及将剩余的预加压气体从模具腔排放到真空室装置，以允许注塑的可发泡树脂材料在模腔内膨胀，真空将树脂材料拉伸遍及模腔。 此外，真空室通过多个间隔通道耦合到模腔，使得真空在整个空腔中的各个位置被拉伸，从而在注入的材料膨胀时增强空腔的完全填充。 在注射装置的喷嘴关闭之后的预定时间期满后，在注射步骤之后自动排出模具。 用于执行该方法的模具包括用于将气体输送到模腔并从其中排出气体的改进的气流装置。 模具还包括改进的密封装置，用于密封模具以根据需要将其保持在加压状态。

    Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin
    22.
    发明授权
    Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin 失效
    制造具有光滑非细胞皮肤的双壁内部波纹状塑料结构部件的方法

    公开(公告)号：US4474717A

    公开(公告)日：1984-10-02

    申请号：US381105

    申请日：1982-05-24

    申请人： James W. Hendry

    发明人： James W. Hendry

    IPC分类号： B29C59/00 ,  B29C44/04 ,  B29C44/10 ,  B29C45/00 ,  B29C45/17 ,  B29D27/00

    CPC分类号： B29C45/1734 ,  B29C44/0461 ,  B29C44/105 ,  B29C45/1704 ,  B29C2045/1738 ,  Y10S264/83 ,  Y10S425/812

    摘要： A method and apparatus for making a twin-wall internally corrugated plastic structural part provided with a smooth, dense, solid, thin walled, non-cellular skin comprising injecting a thermoplastic or resin material into a pair of closed mold members which define a sealed cavity. A small amount of plastic material is initially injected into the cavity with the material impinging upon and being dispersed over the mold members thereby forming a generally continuous thin skin substantially the mold surfaces. Thereafter, successively and intermittently injecting an inert gas under pressure through one mold member during continued injection of the plastic material into the cavity thereby pressurizing the skin against the walls of the mold cavity and progressively commingling the inert gas under pressure and the inwardly flowing plastic material as both enter the cavity until the cavity is filled with an internal corrugated body integral with and bonded to the skin. Further steps include cooling the twin-wall internally corrugated structural part to permit the same to solidify as an integral unit and venting the mold cavity to atmosphere to relieve pressure from the corrugated plastic structural part. The intermittent injection of the inert gas introduces minute amounts of pressurized gas into the continuously injected plastic material.

    摘要翻译： 一种用于制造双壁内波纹塑料结构部件的方法和装置，其具有光滑，致密，固体，薄壁，非细胞表皮，包括将热塑性或树脂材料注射到限定密封腔的一对闭合的模具构件中 。 最初将少量的塑料材料注入到空腔中，其中材料撞击并分散在模具构件上，从而基本上形成基本上连续的薄的表皮。 此后，在将塑料材料持续注入空腔期间，连续地和间歇地将压力下的惰性气体注入一个模具构件，从而使皮肤抵靠模腔的壁加压并且在压力下逐渐混合惰性气体和向内流动的塑料材料 因为两者都进入空腔，直到腔充满与皮肤成一体并与皮肤结合的内部波纹体。 进一步的步骤包括冷却双壁内部波纹状结构部件，使其能够固化为整体单元，并将模具腔排放到大气中以缓解波纹状塑料结构部件的压力。 间歇地注入惰性气体将少量的加压气体引入连续注入的塑料材料中。

    Mould assembly for foam moulding of plastic materials
    23.
    发明授权
    Mould assembly for foam moulding of plastic materials 失效
    用于塑料材料发泡成型的模具组件

    公开(公告)号：US4153231A

    公开(公告)日：1979-05-08

    申请号：US848321

    申请日：1977-11-03

    申请人： Akifumi Hayakawa ,  Akira Aiba ,  Eiki Orihara ,  Kiyoshi Fukushima

    发明人： Akifumi Hayakawa ,  Akira Aiba ,  Eiki Orihara ,  Kiyoshi Fukushima

    IPC分类号： B29C44/10 ,  B29D27/00

    CPC分类号： B29C44/586 ,  B29C44/105 ,  Y10S264/83

    摘要： Mould assembly for foam moulding of plastic materials, which comprises stationary and movable dies and an auxiliary die plate device between the stationary and movable dies. A gas passage is formed for introducing pressurized inert gas into the mould cavity. The auxiliary die device comprises separated inner and outer auxiliary dies both being spring biased toward the stationary die. O-ring seals are disposed between the opposite surfaces of the outer auxiliary die and the stationary and movable dies.

    摘要翻译： 用于塑料材料的泡沫塑模的模具组件，其包括固定和可移动模具以及在固定和可动模具之间的辅助模板装置。 形成用于将加压的惰性气体引入模腔中的气体通道。 辅助模具装置包括被分离的内部和外部辅助模具，其被弹性偏压到固定模具。 O形环密封件设置在外辅助模具和固定和可移动模具的相对表面之间。

    Injection foam molding process
    24.
    发明授权
    Injection foam molding process 失效
    注塑成型工艺

    公开(公告)号：US4133858A

    公开(公告)日：1979-01-09

    申请号：US860317

    申请日：1977-12-14

    申请人： Akifumi Hayakawa ,  Akira Aiba ,  Eiki Orihara ,  Kiyoshi Fukushima

    发明人： Akifumi Hayakawa ,  Akira Aiba ,  Eiki Orihara ,  Kiyoshi Fukushima

    IPC分类号： B29C43/00 ,  B29C44/08 ,  B29C44/10 ,  B29C44/58 ,  B29C45/00 ,  B29D27/00

    CPC分类号： B29C44/3415 ,  B29C44/083 ,  B29C44/105 ,  B29C44/586 ,  Y10S264/05 ,  Y10S264/83

    摘要： This invention relates to an improved injection foam molding method in which a foamable mixture of molten synthetic polymer resin and a chemical blowing agent in unfoamed condition is injected into a gas-pressurized expandable mold having a mold section movable for expanding the mold cavity to a position in which the surface of that section is in registry to the surface of another mold section, in which process the mold is filled under conditions resisting foaming of the material prior to filling of the mold and a novel controlled time sequence effective to form a fine mold crease line is employed in releasing the gas pressure and expanding the mold to allow foaming of the mixture into conformity with the mold surface.

    摘要翻译： 本发明涉及一种改进的注射发泡成型方法，其中熔融合成聚合物树脂和未发泡状态的化学发泡剂的可发泡混合物被注入到具有可移动的模具部分的气体加压可膨胀模具中，以将模具腔扩展到位置 其中该部分的表面与另一个模具部分的表面对准，在该过程中，模具在填充模具之前在阻止材料发泡的条件下被填充，并且具有有效形成细模具的新颖的受控时间顺序 使用折痕线释放气体压力并使模具膨胀以允许混合物发泡与模具表面一致。

    Method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks
    25.
    发明授权
    Method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks 失效
    制备具有光滑表面而没有漩涡痕迹和毛发裂纹的发泡热塑性树脂制品的方法

    公开(公告)号：US4096218A

    公开(公告)日：1978-06-20

    申请号：US709108

    申请日：1976-07-27

    申请人： Akio Yasuike ,  Tsutomu Odagiri ,  Toshiba Machine Co. Limited

    发明人： Akio Yasuike ,  Tsutomu Odagiri ,  Toshiba Machine Co. Limited

    IPC分类号： B29C44/10 ,  B29D27/00

    CPC分类号： B29C44/105 ,  Y10S264/05 ,  Y10S264/14 ,  Y10S264/83 ,  Y10T428/249989

    摘要： A method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks, which comprises melting a thermoplastic resin containing a condensable blowing agent and an organic chemical blowing agent, injecting, in full shot, the molten resin into a mold cavity to which a pressurized gas is being applied during said injection, terminating the application of the pressurized gas to the mold cavity, enlarging the volume in said molded cavity by movement of a mold wall, and thereafter cooling and solidifying the resin to form the foamed articles.

    摘要翻译： 一种制造具有光滑光滑表面的不含旋转痕迹和毛发的发泡热塑性树脂制品的方法，其包括熔化包含可冷凝发泡剂和有机化学发泡剂的热塑性树脂，将熔融树脂全部注入到 在所述注射期间，施加加压气体的模腔，终止将加压气体施加到模腔，通过模具壁的移动扩大所述模制腔中的体积，然后冷却和固化树脂，形成 发泡制品。

    Method of producing molded parts with a smooth noncellular skin and a cellular core from foamable thermoplastic material
    26.
    发明授权
    Method of producing molded parts with a smooth noncellular skin and a cellular core from foamable thermoplastic material 失效
    从发泡性热塑性材料制备具有光滑非细胞表皮和细胞芯的模制部件的方法

    公开(公告)号：US4092385A

    公开(公告)日：1978-05-30

    申请号：US634527

    申请日：1975-11-24

    申请人： Angel Tonchev Balevski ,  Ivan Dimov Nikolov ,  Evgeni Hristov Mateev ,  Todor Kostadinov Trifonov ,  Vassil Vladimirov Kojuharov

    发明人： Angel Tonchev Balevski ,  Ivan Dimov Nikolov ,  Evgeni Hristov Mateev ,  Todor Kostadinov Trifonov ,  Vassil Vladimirov Kojuharov

    IPC分类号： B29C44/10 ,  B29D27/00

    CPC分类号： B29C44/105 ,  Y10S264/14 ,  Y10S264/83

    摘要： A method of injection molding foamed articles wherein, after the mold is closed and while the mold is held closed, a gas counterpressure is generated within the mold cavity against which a portion of the foamable resin is injected under a pressure which prevents foaming. Thereafter, a shape-forming element adapted to be retracted to be flush with a wall of the mold cavity in the final phase thereof, is advanced to force the nonfoamed material, still against the gas counterpressure, into the remainder of the cavity. After a skin has formed, on the mass within the mold cavity the latter element is retracted to permit foaming, preferably after foaming has been initiated by allowing a portion of the foamable mass to recede into the injection cylinder during the inception of the foaming process.

    摘要翻译： 一种注射发泡制品的方法，其中在模具关闭之后并且在模具保持关闭的同时，在模具腔内产生气体反压力，在一定的压力下，在可模制树脂的一部分被注射以防止起泡。 此后，适于缩回以在其最后阶段与模腔的壁齐平的成形元件前进，以将未发泡的材料仍然抵抗气体反压力压入空腔的其余部分。 在形成皮肤之后，在模腔内的质量上，后一个元件缩回以允许发泡，优选在起泡之后，通过允许一部分可发泡物质在发泡过程开始时退出到注射筒中。

    Method of injection molding foamable plastic with minimized wastage
    27.
    发明授权
    Method of injection molding foamable plastic with minimized wastage 失效
    注射成型可塑性塑料的最小化方法

    公开(公告)号：US3773873A

    公开(公告)日：1973-11-20

    申请号：US3773873D

    申请日：1970-06-22

    申请人： ALLIED CHEM

    发明人： SPAAK A ,  WEIR C

    IPC分类号： B29C44/10 ,  B29C45/28 ,  B29D27/00

    CPC分类号： B29C45/2806 ,  B29C44/105 ,  Y10S264/05 ,  Y10S264/14 ,  Y10S264/17 ,  Y10S264/83

    摘要： THIS DISCLOSURE IS DIRECTED TO A METHOD FOR INJECTION MOLDING. PREMATURE FOAMING AND SETTING OF FOAMABLE MOLDING MATERIALS IS PREVENTED BY ACCOMPLISHING THE INJECTION OF THE FOAMABLE MOLDING MATERIAL INTO A MOLD CAVITY HAVING A GASEOUS SUBSTANCE THEREIN AT A PRESSURE IN EXCESS OF THAT REQUIRED TO PREVENT FOAMING OF THE MOLDING MATERIAL. PLANNED WASTAGE OF MOLDING MATERIAL IS MINIMIZED BY PROVIDING PISTIONS IN THE RUNNERS WHICH CARRY THE MOLDING MATERIALS TO THE MOLD, WHICH PISTONS FORCE EXCESS MOLDING MATERIAL AWAY FROM THE MOLD SO AS TO RECOMPRESS AND RECOVER THE MATERIAL, THEREBY TO BE USED IN THE NEXT SUBSEQUENT MOLDING CYCLE.