Production process of expansion-molded article
AssigneeJsp Corporation
InventorsMakoto Kamiyama, Shigeo Nakada, Kouji Ikeda, Hiroshi Usui, Kazutoshi Sasaki, Hiroshi Yamamoto
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Abstract
An expansion-molded article is produced by filling prefoamed thermoplastic particles in a mold cavity formed in combination of mold sections, through each of which plural heating medium holes are defined, and then feeding a heating medium such as steam through the holes to heat and fusion-bond the particles into the article conforming with the mold cavity. Each of the mold sections is covered by a permeable porous sheet at least over the heating medium on a side of the mold cavity.
Claims13
A process for producing an expansion-molded article by filling prefoamed thermoplastic particles in a mold cavity formed in combination of mold sections through each of which plural heating medium holes are defined, and then feeding a heating medium through the holes to heat and fusion-bond the particles into the article conforming with the mold cavity, wherein each of the mold sections is covered by a permeable porous sheet having an average pore size of from about 10 .ANG. to 100 nm, at least over the heating medium holes on a side of the mold cavity.
Dependencies are inferred from the claim text.