发明名称 Injection moulding of long hollow rods esp - spectacle frames
摘要 <p>The moulding device has a pin placed in a guide tube centred in the mould for the piece, the tube being withdrawn mechanically during injection by device operated by the injected material in a secondary mould. The withdrawal of the guide tube from the pin is brought about by the movement of a mobile punch of constant section moving in a secondary mould and coupled mechanically to the tube. The movement of the punch may be used to control the advance of the injected material into the mould. A long stalk such as is used to hold spectacle frames can be made in one process with a small hole through it to hold a pin without risking the de-centering of the pin due to the moulding pressure.</p>
申请公布号 FR2055248(A5) 申请公布日期 1971.05.07
申请号 FR19700026296 申请日期 1970.07.08
申请人 VANOTTI GERARD 发明人
分类号 B29C45/36;B29C45/56;(IPC1-7):29F1/00;29D12/00 主分类号 B29C45/36
代理机构 代理人
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