| 摘要 |
PURPOSE:To obtain a simultaneous molded article by a method wherein molding forces are charged with expandable resin grains, which are heated from the side charged with a different material, the boundary sections are welded before the forces are opened, a gap is laid between the boundary sections, said gap is charged with the different material and heated and then both surfaces are heated from the charging side. CONSTITUTION:The cavity of a molding die is charged with the material of expandable thermoplastic grains, the material is heated from the side of the gap for a different material, the boundary sections at least of the molding forces are welded, the forces are not opened for a time until expanding pressure disappears, next, the molding forces are opened to make a gap with a necessary thickness on the boundary side, said gap is charged with the different material, the material is heated from the charging side and then from the reverse side also and, moreover, both sides are heated, keeps the temperature and then cooled. Thus, it is possible to obtain the simultaneous molding method suitable to save energy. |
