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COEXTRUSION DIE AND SYSTEM, METHOD OF MAKING COEXTRUDED ARTICLES AND COEXTRUDED ARTICLES MADE THEREBY

机译:共挤模具和系统,制造共挤制品的方法以及由此制成的共挤制品

摘要

An extrusion die (20) and method for co-extruding a first molten polymeric material and a second molten polymeric material. The die includes a first die portion (20), a second die portion and a shim separating the first die portion and the second die portion. The shim has a first side and a second side, the first side of the shim forming a boundary of the first die portion and defining a first die cavity (38), the second side of the shim forming a boundary of the second die portion and defining a second die cavity (40). A dispensing edge (36) is provided having a plurality of first and second extrusion openings, a plurality of first feed channels connecting the first die cavity to the first extrusion openings along the dispensing edge, and a plurality of second feed channels connecting the second die cavity to the second extrusion openings along the dispensing edge. The first and second extrusion openings arranged along the dispensing edge to provide an interfacial zone having portions of the first extrusion openings disposed between portions of the second extrusion openings. The die is used in an extrusion system and a method for making a multilayered article.
机译:共挤出第一熔融聚合物材料和第二熔融聚合物材料的挤出模头(20)和方法。模具包括第一模具部分(20),第二模具部分和将第一模具部分和第二模具部分分开的垫片。垫片具有第一侧面和第二侧面,垫片的第一侧面形成第一模具部分的边界并限定第一模具腔(38),垫片的第二侧面形成第二模具部分的边界,并且限定第二模腔(40)。提供了分配边缘(36),其具有多个第一和第二挤出开口,沿着分配边缘将第一模具腔体与第一挤出开口连接的多个第一进料通道,以及将第二模具连接的多个第二进料通道沿着分配边缘到第二挤出开口的空腔。沿着分配边缘布置的第一和第二挤压开口提供了界面区域,该界面区域具有布置在第二挤压开口的部分之间的第一挤压开口的部分。该模具用于挤出系统和制造多层制品的方法中。

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