发明授权
- 专利标题： Extrusion screw for thermoplastic matter
- 专利标题（中）： 热塑性材料挤出螺丝
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申请号： US358380申请日： 1989-05-11
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公开(公告)号： US5020915A公开(公告)日： 1991-06-04
- 发明人: Philippe Julien
- 申请人： Philippe Julien
- 申请人地址： CHX Lausanne
- 专利权人： Advanced Recycling Technology Ltd.
- 当前专利权人： Advanced Recycling Technology Ltd.
- 当前专利权人地址： CHX Lausanne
- 优先权： BEX8701043 19870916
- 主分类号： B29C47/60
- IPC分类号： B29C47/60
摘要：
The extrusion screw for thermoplastic material comprises a helical thread, having a trapezoidal profile with a flat crest and inclined flanks, the pitch and the width or the root of which remains constant, while the inside diameter of the screw increases from the entry of the screw in the direction of the exit.