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1. 发明授权

US5261805A Die for extrusion of blown plastic film 失效
标题翻译：用于吹塑塑料膜的挤出模
公开(公告)号：US5261805A
公开(公告)日：1993-11-16
申请号：US155978
申请日：1988-02-16
申请人： Peter C. Gates
发明人： Peter C. Gates
IPC分类号： B29C47/20 , B29C47/70 , B29D23/22
CPC分类号： B29C47/0026 , B29C47/20 , B29C47/702 , B29C47/705
摘要： The invention relates to the kind of die which has many helical grooves (40) spiralling around a mandrel, and to a new way of feeding the liquid resin from the main supply duct (48) to the grooves. Instead of the usual one groove to one conduit relationship, in the invention the channels (41) to the grooves are intercalated with the conduits (47). Each groove is fed via feed-channels (45,46) from two of the conduits, and each conduit feeds two of the grooves. The result is that the cooler liquid resin from the walls of the main duct is constrained to move to the centre of the stream in the groove. The arrangement leads to an improvement In the homogeneity of the resulting film.
摘要翻译：本发明涉及具有围绕心轴螺旋形的许多螺旋槽（40）的模具的种类，以及将液体树脂从主供应管道（48）供给槽的新方法。代替通常的一个沟槽到一个导管关系，在本发明中，沟槽（41）插入导管（47）。每个槽通过来自两个管道的进料通道（45,46）进料，每个管道供给两个槽。结果是来自主管壁的较冷的液体树脂被限制为移动到槽中的流的中心。在所得膜的均匀性方面，排列导致改进。

2. 发明授权

US06305922B1 Spiral fed multi-layer tubular die 失效
标题翻译：螺旋进料多层管状模具
公开(公告)号：US06305922B1
公开(公告)日：2001-10-23
申请号：US08377924
申请日：1995-01-25
申请人： Peter C. Gates
发明人： Peter C. Gates
IPC分类号： B29C4706
CPC分类号： B29C47/0023 , B29C47/0026 , B29C47/065 , B29C47/263 , B29C47/705
摘要： An extrusion die apparatus for extruding a multiple layer tubular product comprising an elongated cylindrical mandrel and a plurality of annular die elements mounted co-axially one behind the other on the mandrel forming contiguous annular thickness control passages between the die elements and the mandrel. The die elements have inner and outer conical surfaces inclined rearwardly at a predetermined angle with respect to the longitudinal axis of the mandrel. The die elements are nested together with the outer conical surfaces of one die element facing the inner conical surfaces of an adjacent die element. The inner and outer conical surfaces form conical passages therebetween which communicate with the annular thickness control passages and a helical groove is provided on the outer conical surface of each die element. Means are provided for delivering a molten thermoplastic material to the conical passages wherein the material is substantially uniformly distributed over the outer conical surface containing the helical groove.
摘要翻译：一种用于挤出多层管状产品的挤出模具装置，其包括细长的圆柱形心轴和多个环形模具元件，多个环形模具元件在心轴上一个接一个地安装在心轴上，从而在模具元件和心轴之间形成连续的环形厚度控制通道。模具元件具有相对于心轴的纵向轴线以预定角度向后倾斜的内部和外部锥形表面。模具元件与一个模具元件的面向相邻模具元件的内圆锥形表面的外锥形表面嵌套在一起。内锥形表面和外圆锥形表面之间形成与环形厚度控制通道连通的圆锥形通道，并且在每个模具元件的外锥形表面上设置螺旋槽。提供了用于将熔融热塑性材料输送到锥形通道的装置，其中材料基本上均匀地分布在包含螺旋槽的外锥形表面上。

3. 发明授权

US5538411A Spiral fed multi-layer tubular die 失效
标题翻译：螺旋进料多层管状模具
公开(公告)号：US5538411A
公开(公告)日：1996-07-23
申请号：US329095
申请日：1994-10-25
申请人： Peter C. Gates
发明人： Peter C. Gates
IPC分类号： B29C47/26 , B29C47/06 , B29C47/70 , B29C49/04 , B29C49/22 , B29C49/78 , B29L9/00 , B29L23/00
CPC分类号： B29C47/0023 , B29C47/0026 , B29C47/065 , B29C47/263 , B29C47/705
摘要： An extrusion die apparatus for extruding a multiple layer tubular product including a plurality of annular die elements mounted co-axially one behind the other on a mandrel forming annular thickness control passages between the die elements and the mandrel. The die elements have inner and outer conical surfaces inclined rearwardly with respect to the longitudinal axis of the mandrel. The die elements are nested together with the outer conical surfaces of one die element facing the inner conical surfaces of an adjacent die element. The inner and outer conical surfaces form conical passages which communicate with the annular thickness control passages and a plurality of helical grooves are provided on the outer conical surface of each die element. A binary divider system is provided for distributing a molten thermoplastic material from an inlet to a plurality of outlets communicating with said grooves on each die element.
摘要翻译：一种用于挤出多层管状产品的挤出模具装置，所述多层管状产品包括多个环形模具元件，所述多个环形模具元件一个接一个地安装在心轴上，所述心轴在模具元件和心轴之间形成环形厚度控制通道模具元件具有相对于心轴的纵向轴线向后倾斜的内圆锥表面和外锥形表面。模具元件与一个模具元件的面向相邻模具元件的内圆锥形表面的外锥形表面嵌套在一起。内锥形表面和外锥形表面形成与环形厚度控制通道连通的圆锥形通道，并且在每个模具元件的外锥形表面上设置多个螺旋槽。提供二元分配器系统用于将熔融热塑性材料从入口分配到与每个模具元件上的所述凹槽连通的多个出口。

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