Production process of expansion-molded article

Details Production process of expansion-molded article Production process of expansion-molded article

B - Operations, Transporting

29

C

18/673

B29C 35/04 (2006.01) B29C 33/38 (2006.01) B29C 33/40 (2006.01) B29C 44/58 (2006.01) B29C 67/20 (2006.01)

Patent

CA 2032719

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 holes on a side of the mold cavity.

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