发明名称 |
METHOD OF MANUFACTURE OF A FOAMED CORE CLASS A ARTICLE |
摘要 |
<p>The method for manufacturing an article having a surface, a skin, and a core includes closing a first mold portion on a compressible seal. The seal is disposed between the first and second mold portions. The portions define a pressurizable mold cavity having a spaced apart injection port and a vent. The mold cavity is pressurized at a first pressure greater than atmospheric pressure. Molten plastic and a blowing agent are injected form gas cells within the mixture. The gas cells have an internal pressure exceeding the first pressure. After waiting for a first period, the pressurizing gas is vented for a second period at a rate sufficient to rupture the gas cells which form a skin adjacent to the mold cavity wall. The skin defines a core cavity filled with the foamed mixture, which is solidified. The mold portions are separated releasing the article.</p> |
申请公布号 |
WO2009120850(A3) |
申请公布日期 |
2009.11.12 |
申请号 |
WO2009US38374 |
申请日期 |
2009.03.26 |
申请人 |
DELTA TOOLING COMPANY;MOZER, WILFRIED;DESMITH, BRIAN, L. |
发明人 |
MOZER, WILFRIED;DESMITH, BRIAN, L. |
分类号 |
B29C44/08;B29C44/16 |
主分类号 |
B29C44/08 |
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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