| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin molded product excellent in appearance, lightweight nature, rigidity through enhancing an extent of foaming of an inside foamed resin that is covered by a surface layer made of a solid resin and through avoiding the partial drop of the rigidity of the surface layer that constitutes the primary hollow molded body. SOLUTION: The molding method of the resin molded products comprises a process of molding a parison with a solid resin, a process of sandwiching the molded parison with molding dies and blowing the air into the inside to form into a predetermined shape, a process wherein, while the obtained hollow molded body is kept in the molding dies, a molten foaming resin is injected into the hollow molded body, a process wherein, while the molding dies are opened by a predetermined amount after the injection, the foaming resin is foamed to be filled into the hollow molded body and a process of forming, on the surface of the part X where the hollow molded body is stretched by the opening of the molding dies by the predetermined amount in the above process, the recess Y that retracts to the inside side of the resultant resin molded product A. COPYRIGHT: (C)2009,JPO&INPIT
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