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    CO-INJECTION MOULDING
    5.
    发明申请
    CO-INJECTION MOULDING 有权
    注射成型

    公开(公告)号：US20130056466A1

    公开(公告)日：2013-03-07

    申请号：US13634512

    申请日：2011-03-14

    申请人： Geoffrey York ,  Esak Shabudin

    发明人： Geoffrey York ,  Esak Shabudin

    IPC分类号： B29C45/16 ,  B65D51/00

    CPC分类号： B29C45/0046 ,  B29C33/42 ,  B29C45/1603 ,  B29C45/164 ,  B29C45/1642 ,  B29C2045/1614 ,  B29C2045/1648 ,  B29K2101/12 ,  B29K2995/0067 ,  B29L2031/7132 ,  B65D85/8043 ,  B65D85/8046

    摘要： The present invention relates to advancements in injection moulding and in particular to a method and apparatus for co-injection moulding articles of complex non symmetrical geometry. The method forms a multilayer injection moulded article comprising an outer skin of a first material and a central core of a second material which is encapsulated by the outer skin. The first and second materials are injected in a single stream into a cavity of an injection mould, with the second material encased within the first material. The flow of the stream is controlled by means of flow paths within the mould cavity such that both the first and second materials are present in at least one first area of the mould cavity and that only the first material is present in at least one second area of the mould cavity. The flow paths include at least one primary flow path in the first mould cavity area which divides into at least two secondary flow paths. The resistance of a first of the secondary flow paths in the at least one first mould cavity area is reduced relative to that of a second of the two secondary flow paths, which is in the at least the second mould cavity area.

    摘要翻译： 本发明涉及注射成型的进展，特别涉及用于共注射成型复杂非对称几何形状的制品的方法和装置。 该方法形成多层注射成型制品，其包括第一材料的外皮和由外皮包封的第二材料的中心芯。 将第一和第二材料以单一流注射到注射模具的空腔中，其中第二材料包封在第一材料内。 流的流动通过模腔内的流动路径来控制，使得第一和第二材料都存在于模腔的至少一个第一区域中，并且仅第一材料存在于至少一个第二区域 的模腔。 流动路径包括在第一模腔区域中的至少一个主流动路径，其分成至少两个二次流动路径。 至少一个第一模腔区域中的第一二次流路的阻力相对于位于至少第二模腔区域中的两个二次流路中的第二流路的阻力减小。

    Five layer injection molding apparatus having four position valve member actuating mechanism
    8.
    发明授权
    Five layer injection molding apparatus having four position valve member actuating mechanism 失效
    具有四位置阀构件致动机构的五层注塑设备

    公开(公告)号：US6074191A

    公开(公告)日：2000-06-13

    申请号：US977676

    申请日：1997-11-24

    申请人： Jobst Ulrich Gellert ,  Denis L. Babin

    发明人： Jobst Ulrich Gellert ,  Denis L. Babin

    IPC分类号： B29C45/28 ,  B29C45/16 ,  B29C45/53 ,  B29C45/73 ,  B29C45/76 ,  B29C45/22

    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，阀构件的前端充分缩回以允许初始量的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，其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。

    CO-INJECTION NOZZLE COMPRISING INTEGRATED BACK-FLOW BARRIER
    9.
    发明申请
    CO-INJECTION NOZZLE COMPRISING INTEGRATED BACK-FLOW BARRIER 审中-公开

    公开(公告)号：US20170312961A1

    公开(公告)日：2017-11-02

    申请号：US15524795

    申请日：2015-09-22

    申请人： FOSTAG Formenbau AG

    发明人： Rolf Mühlemann

    IPC分类号： B29C45/23 ,  B29C45/16 ,  B29C45/13 ,  B29L31/00

    CPC分类号： B29C45/231 ,  B29C45/13 ,  B29C45/1603 ,  B29C45/1607 ,  B29C45/1642 ,  B29C2045/1648 ,  B29K2995/0067 ,  B29L2031/712 ,  B29L2031/7148

    摘要： A co-injection nozzle for an injection moulding device for producing multi-layered injection-moulded products. The nozzle includes: a central bore; a valve needle for opening and closing a nozzle opening; an annular inner melt channel for the first melt; an annular central melt channel for a second melt; and an annular outer melt channel for the first melt. The inner, central and outer melt channels are fluidically combined in the region of the nozzle tip to form a concentrically-layered melt stream. The co-injection nozzle has a back-flow barrier, integrated into the central bore, for the second melt, this barrier formed by a cut-out in the valve needle and by a melt channel for the second melt, the channel penetrating the central bore. In the open position of the back-flow barrier, the cut-out is located such that the second melt can flow through the melt channel, whilst flowing in the central bore past the valve needle.