发明名称 |
Mold for injection molding a thermoplastic part free from sink marks using a void inducing member |
摘要 |
When injection-molding a molten thermoplastic resin into a molding having different thicknesses, a void inducing member is set in a cavity corresponding to heavy sections. Then gas pressure is applied passing through a gas passageway to a tip end of the void inducing member, thus forming a void nucleus in the resin adjacent to the tip end of the void inducing member. The void nucleus develops to a void by shrinking force of the resin as the molten resin cools.
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申请公布号 |
US5540581(A) |
申请公布日期 |
1996.07.30 |
申请号 |
US19950449840 |
申请日期 |
1995.05.24 |
申请人 |
NIPPON STEEL CHEMICAL CO., LTD. |
发明人 |
AIDA, HIROSHI;HAZAWA, RYOHEI |
分类号 |
B29C45/26;B29C45/17;B29C45/57;(IPC1-7):B29C45/00 |
主分类号 |
B29C45/26 |
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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