发明名称 |
Apparatus and method for blow molding |
摘要 |
In blow molding an article with a reverse fold, a profiled bar is positioned where the parting line of the mold is to be when the mold is closed. The bar provides a reverse fold in the plastic article during a pre-blow step. In operation, a pre-pinched parison is formed adjacent the bar and as the mold begins to close a small amount of pre-blow air is introduced into the parison folding it against and over the bar. After the mold is closed, blow air is introduced to form the part. A complex part with good wall distribution of material can be obtained by this method.
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申请公布号 |
US4510116(A) |
申请公布日期 |
1985.04.09 |
申请号 |
US19830517604 |
申请日期 |
1983.07.27 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
PETERS, DONALD L.;RATHMAN, JOHN R.;SUMPTER, IRVIN L. |
分类号 |
B29C49/02;B29C49/04;B29C49/48;(IPC1-7):B29C17/07 |
主分类号 |
B29C49/02 |
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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