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1. 发明授权

US4771981A Collapsible mould core 失效
标题翻译：可折叠模芯
公开(公告)号：US4771981A
公开(公告)日：1988-09-20
申请号：US898914
申请日：1986-08-21
申请人： Walter W. Little , Peter R. Clarke
发明人： Walter W. Little , Peter R. Clarke
IPC分类号： B29C33/48 , B29C33/02
CPC分类号： B29C33/485 , Y10S425/005
摘要： The invention relates to a collapsible core for a mould. The core comprises three relatively movable assemblies. The first assembly carries a cone, the second assembly carries an inner set of segments which form part of the core surface and engage the cone and the third assembly carries outer segments moved by inclined pins on the second assembly. As the assemblies are moved together the outer segments move radially outwards and the inner segments move axially in between them. Then the inner segments move radially outwards and the cone fills the center of the core. On reversal of the movement, the core is collapsed to enable it to be withdrawn from the moulded article.
摘要翻译：本发明涉及一种用于模具的可折叠芯。该芯包括三个相对移动的组件。第一组件带有锥体，第二组件承载形成芯部表面的一部分并与锥体接合的内部组，第三组件承载由第二组件上的倾斜销移动的外部段。当组件一起移动时，外部段径向向外移动，并且内部段在它们之间轴向移动。然后内部段径向向外移动，锥体填充芯的中心。在反转运动时，芯部被折叠以使其能够从模制品中取出。

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