METHOD AND APPARATUS FOR MOLDING RESIN MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for molding a resin molding which can prevent wall thinning while accelerating foaming based on an expandable resin. SOLUTION: The molten expandable resin 70 is supplied into a blow-molded body 41 in a mold 4. After that, the mold 4 is opened in the mold opening direction in a prescribed quantity to enlarge a cavity 27. The resin 70 is foamed to expand the body 41. After the end of the mold opening action in the prescribed quantity of the mold 4 a part 44 of the blow-molded body 41 stretched on the basis of the expansion of the body 41 is supplied with a molten non-expandable resin 45 to prevent the wall of the stretched part 44 of the body 41 from being thinner than the walls of the other parts. COPYRIGHT: (C)2008,JPO&INPIT