发明名称 |
Blow molding method using extendable mandrel and blow needle |
摘要 |
A method for blow molding using a blow mold having mold halves which are relatively movable and receive a parison therebetween. A mandrel is carried by portions of the mold and is movable between an extended position and a retracted position. The mandrel has a free end with a vacuum surface area portion with the end being engageable with the parison when the mandrel is in its extended position. A blow needle is reciprocably mounted in the mandrel and insertion of same into the parison is facilitated by the parison being held against the end of the mandrel by vacuum.
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申请公布号 |
US4087503(A) |
申请公布日期 |
1978.05.02 |
申请号 |
US19760674805 |
申请日期 |
1976.04.08 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
PETERS, DONALD L. |
分类号 |
B29C49/04;B29C49/60;(IPC1-7):B29C17/07 |
主分类号 |
B29C49/04 |
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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