Production process of expansion-molded article.

摘要

An expansion-molded article is produced by filling prefoamed thermoplastic particles in a mold cavity (9) formed in combination of mold sections (1,2), through each of which plural heating medium holes (8) 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 (16) at least over the heating medium holes on a side of the mold cavity.