发明授权
- 专利标题： Method of forming a bell end on thermoplastic pipe
- 专利标题（中）： 在热塑管上形成钟形端的方法
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申请号： US656538申请日： 1976-02-09
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公开(公告)号： US4113829A公开(公告)日： 1978-09-12
- 发明人: Donald R. Bowker , Donald J. Klein , Stephen E. Rados
- 申请人： Donald R. Bowker , Donald J. Klein , Stephen E. Rados
- 申请人地址： OH Dayton
- 专利权人： Philips Industries Inc.
- 当前专利权人： Philips Industries Inc.
- 当前专利权人地址： OH Dayton
- 主分类号： B29C45/26
- IPC分类号： B29C45/26 ; B29C45/44 ; B29C57/02 ; B29C57/08 ; B29D23/00 ; B29F1/00 ; B29C5/00
摘要：
Method of making grooved, bell-ended thermoplastic pipe. In order to remove the core from undercuts, most of the molded article is cooled until substantially rigid while the bell-end is cooled more slowly. The article is ejected from the mold while the bell end is still soft enough to be deformed during ejection but recovers its shape after removal from the mold.
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