| 摘要 |
PROBLEM TO BE SOLVED: To prevent the thickness reduction of a skin accompanying the core back of a mold in forming a skinned solid resin molded product. SOLUTION: This molding method of the resin molded product includes an extrusion process for extruding a cylindrical body, which comprises a non-foamable molten resin, into the mold from an extruder, a blow molding process for expanding the cylindrical body in the mold, a filling process for filling the expanded cylindrical body with a foamable molten resin, and a core back process for increasing the cavity space in the mold by the core back of the mold to foam the foamable molten resin. In the extrusion process, a demarcation wall body comprising non-foamable molten resin for demarcating the internal space of the cylindrical body is extruded along with the cylindrical body by the extruder to form the molded product wherein the demarcation wall body is laminated on the stretched part, which is stretched by the core back of the mold in the core back process, of the cylindrical body. COPYRIGHT: (C)2008,JPO&INPIT |
