发明名称 |
Co-injection methods using endothermic-blowing agents and products made therefrom |
摘要 |
The invention provides a method of co-injection molding. The method includes mixing a plastic inner material and an endothermic-blowing agent to form a core mixture. A plastic outer material is injected from a first injection unit into a co-injection manifold to create a flow of outer material therethrough. The core mixture is injected from a second injection unit into the co-injection manifold to create a flow of core mixture therethrough. The flow of the outer material and the flow of the core mixture are then controlled through the co-injection manifold and into a mold cavity. The core mixture expands as heat is provided for the endothermic-blowing agent to absorb.
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申请公布号 |
US6964748(B2) |
申请公布日期 |
2005.11.15 |
申请号 |
US20010997766 |
申请日期 |
2001.11.30 |
申请人 |
BEMIS MANUFACTURING COMPANY |
发明人 |
BEMIS PETER F.;BERG GARY VANDE;KOLSTE STEVEN |
分类号 |
A47C5/12;B29B7/74;B29C44/04;B29C45/03;B29C45/13;(IPC1-7):B29C44/06 |
主分类号 |
A47C5/12 |
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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