Process and system for producing multi-layer extrudate
    4.
    发明授权
    Process and system for producing multi-layer extrudate 失效
    生产多层挤出物的方法和系统

    公开(公告)号:US5066435A

    公开(公告)日:1991-11-19

    申请号:US488131

    申请日:1990-03-05

    IPC分类号: B29C47/06 B29C47/92

    摘要: For producing a multi-extrudate of thermoplastically processable plastic, a coextrusion adapter block has a multi-part slide having a plurality of side-by-side slide sections mutually spaced in a direction transverse to the flow direction and slidably fitted in the adapter block for movement to adjustably protrude into a secondary runner for adjusting the thickness of a molten extrudate therein. A multi-layer extrudate emerging from the adapter block is further extruded in an extrusion die, and the thickness of at least one layer thereof is measured at a plurality of positions along the width thereof. The width measurements are used to control the positions of corresponding slide sections so that the layer thicknesses can be accurately controlled during an extruding operation.

    摘要翻译: 为了生产热塑性可加工塑料的多挤出物,共挤出适配器块具有多部分滑动件,其具有多个并排的滑动部分,该横向滑动部分在横向于流动方向的方向上相互间隔开并可滑动地装配在适配器块中 可调节地突出到用于调节其中的熔融挤出物的厚度的次级流道的运动。 从挤出模头进一步挤出从适配器块出来的多层挤出物,并且沿其宽度在多个位置测量其至少一层的厚度。 宽度测量用于控制相应的滑动部分的位置,使得可以在挤压操作期间精确地控制层的厚度。