发明名称 |
PROCESSES OF INJECTION MOLDING FOAMABLE PLASTIC COMPOSITIONS |
摘要 |
A process for the injection molding of a foamable plastic composition which comprises the steps of injecting a molten foamable plastic composition into a cavity having a lower volume than that of a desired molded article; after the completion of injection filling, cooling the composition to the state wherein a solidified layer in contact with a mold surface mingles with a molten inside layer; enlarging the volume of the cavity to that of the desired molded article; and after further cooling, removing the molded article. This molded article comprises a layer having a non- or low-foamed, dense structure on the surface and a high-foamed layer at the inside, and has a light weight and good thermal insulating properties.
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申请公布号 |
US2001001688(A1) |
申请公布日期 |
2001.05.24 |
申请号 |
US19990242674 |
申请日期 |
1999.02.22 |
申请人 |
YOSHIZAKI MICHIO;HONDA KOICHI |
发明人 |
YOSHIZAKI MICHIO;HONDA KOICHI |
分类号 |
B29C44/04;B29C44/58;(IPC1-7):B32B5/20;B29C44/06 |
主分类号 |
B29C44/04 |
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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