Verfahren zum Herstellen eines mehrschichtigen Vorformlings und nach dem Verfahren hergestellter Vorformling
    52.
    发明公开
    Verfahren zum Herstellen eines mehrschichtigen Vorformlings und nach dem Verfahren hergestellter Vorformling 失效
    一种用于根据该方法和预成型体制造多层预成型坯的方法

    公开(公告)号:EP0887169A1

    公开(公告)日:1998-12-30

    申请号:EP98810544.1

    申请日:1998-06-15

    申请人: Altoplast AG

    IPC分类号: B29C45/16

    摘要: Zum Herstellen eines mehrschichtigen und eine innere Sperrschicht (13a) aufweisenden Vorformlings (14) mittels einer Spritzgussvorrichtung (1) werden begrenzte Mengen aus einem ersten (10) und einem zweiten (11) Bestand gespritzt. Der zweite Bestand besteht aus einem Sperrschichtmaterial (13).
    In einer Vorphase wird Material (12) aus dem ersten Bestand (10) in den Formhohlraum (5) bis zu einer Teilfüllung gespritzt, und in einer Hauptphase wird parallel und koaxial eine begrenzte Menge aus dem ersten Bestand (10) und aus einem zweiten Bestand (11) in den Hohlraum (5) eingespritzt.

    摘要翻译: 一个新的程序制造多层预成型坯。 这些有内部阻挡层(13A)。 该设备包括一同心的,选择性堵塞注入喷嘴(2),模具(3)和芯(4)形成的腔体(5)。 两个量的热塑性塑料制备,以形成外,夹层(12A,b)和内阻挡层(13)。 每一个有限数量的注入。 在新的方法中,在初始阶段,第一塑料(12)的部分填充注入空腔。 在主相,这两个组件一起注入。 它们的边界被保持同轴和平行。 声称拥有为预制棒。 其主体部是三层,其包括由另一种材料夹在势垒层(13a)的完全包围呼叫(包括在其边缘处)。

    Manufacturing of multi-layer preforms with scrap PET
    56.
    发明公开
    Manufacturing of multi-layer preforms with scrap PET 失效
    Herstellung von mehrschichtigen Vorformlingen mit PET-Abfall。

    公开(公告)号:EP0655306A3

    公开(公告)日:1995-08-02

    申请号:EP94117368.4

    申请日:1994-11-03

    IPC分类号: B29C45/16 B29C45/26 B29C45/78

    摘要: The technical field of the invention are the moulding machines, particularly the inner part (core pin) of such moulding machines for manufacturing of thermoplastic preforms, which are later on stretch-blown to containers such as PET-bottles. The invention relates to preforms having a multi-layer structure and incorporating a recycled inner layer, embedded into two layers of virgin material being on the outside and the inside of said preform. The core pin is designed by the invention such that the inner layer of the preform has a minimum thickness at their bottom area and that the minimum thickness is considerably larger than that in a layer known from prior art. The increase of layer-thickness is achieved by designing the core (2) in its front end portion (3a,3b) in an unround fashion. Possible designs of unround front ends are a flat (3b) or a shallow dimple (3a). With such design of the core pin the invention assures that the middle recycled layer does not reach the inner surface of the preform to give the preform - although recycled thermoplasts are used - food-compatibility.

    摘要翻译: 本发明的技术领域是成型机,特别是用于制造热塑性预成型件的这种成型机的内部(芯销),其随后在诸如PET瓶的容器中拉伸吹塑。 本发明涉及具有多层结构并包含再循环内层的预成型件,嵌入两层原始材料的外层和内侧。 芯销由本发明设计,使得预成型件的内层在其底部区域具有最小厚度,并且最小厚度显着大于现有技术中已知的层中的最小厚度。 通过在其前端部分(3a,3b)中以非圆形方式设计芯部(2)来实现层厚度的增加。 非圆形前端的可能设计是平坦(3b)或浅凹坑(3a)。 通过这种芯销的设计,本发明确保了中间再循环层未到达预制件的内表面以得到预制件 - 尽管使用了回收的热塑性塑料 - 食品相容性。

    COINJECTION MOLDING OF PREFORMS FOR MULTI-LAYER CONTAINERS
    57.
    发明公开
    COINJECTION MOLDING OF PREFORMS FOR MULTI-LAYER CONTAINERS 失效
    多层容器预制件的夹层成型

    公开(公告)号:EP0528851A4

    公开(公告)日:1993-09-15

    申请号:EP91908658

    申请日:1991-04-19

    IPC分类号: B29C45/16

    摘要: A multi-cavity injection mold (1), for simultaneously injection molding a plurality of multi-layer articles having a single hot runner manifold system (19) for the sequential supply of first and second molten molding materials to the cavities (3) of the mold with each of the materials being supplied simultaneously to all cavities in equal quantities. The invention also provides a core rod (5) for each cavity in which a concavity is provided, adjacent the entry point of the materials into the cavity, to prevent the first injected material in an injection cycle from being washed from the end of the core rod by the second injection material, a buffer of the first injected material in the neck region of the preform to compensate for variations in temperature of the cavities and material being distributed to different parts of the mold and the use of the first part of the metered quantity of the first to be injected material from the next injection cycle to seal the preform at the end of the injection cycle.

    Multilayer nozzle with equalized flow
    58.
    发明公开
    Multilayer nozzle with equalized flow 失效
    Mehrschicht-DüsemitvergleichmässigtemDurchfluss。

    公开(公告)号:EP0378138A2

    公开(公告)日:1990-07-18

    申请号:EP90100275.8

    申请日:1990-01-08

    发明人: Brown, Paul

    IPC分类号: B29C45/16 B29B11/08

    摘要: A nozzle structure is disclosed useful to service individual cavities of a multicavity mold for molding multilayered articles or preforms where the nozzles include a plurality of flow paths (21, 24) for advancing material (22, 26) from external sources through predetermined paths to all cavities, simultaneously. Certain of the flow paths include reservoirs (27) incorporating choke elements for insuring that material exiting from the reservoirs advances into the mold cavities along a uniform front where the front is generally perpendicular to the longitudinal axis of the nozzle.

    摘要翻译: 公开了一种喷嘴结构,其用于维修用于模制多层制品或预成型件的多腔模具的单个空腔,其中喷嘴包括多个流动路径(21,24),用于将材料(22,26)从外部源通过预定路径推进到所有 同时。 某些流动路径包括包含扼流圈元件的储存器(27),用于确保从储存器离开的材料沿着均匀的前部进入模腔,其中前部大致垂直于喷嘴的纵向轴线。