发明名称 |
Method of injection moulding hollow preforms |
摘要 |
In an injection moulding process for forming hollow preforms on a mandrel which is subsequently used as a blowing pin for blowing the preforms to the final shape in a blow mould separation of the preform from the mandrel during cooling of the preform from the injection temperature is prevented by applying a vacuum to the blowing channel in the mandrel before the injection pressure is released.
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申请公布号 |
US4020137(A) |
申请公布日期 |
1977.04.26 |
申请号 |
US19750589316 |
申请日期 |
1975.06.23 |
申请人 |
LEVER BROTHERS COMPANY |
发明人 |
LACHNER, OTTO;BEYERLEIN, LUDWIG;SPELTHAHN, KLAUS |
分类号 |
B29C49/06;B29C49/58;(IPC1-7):B29C17/07;B29F1/00 |
主分类号 |
B29C49/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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