INJECTION MOLDING METHOD FOR GLOSSY PLASTIC COMPOSITE MATERIAL AND INJECTION-MOLDING APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an injection-molding method for a glossy plastic composite material having homogeneous glossiness and capable of developing excellent design properties, and an injection-molding apparatus therefor.;SOLUTION: This injection molding apparatus is equipped with a mold having an injection port 12 provided thereon and a movable push element 14 controlled so as to advance and retreat in the groove of the mold. In a first process, the movable push element 14 is set to a retreat position to almost fill a variable cavity 21, which is converted to an accumulation gap 37, with a molten resin material 4 and, in a second process, the movable push element 14 is set to an advance position to convert the variable cavity 21 to a molding gap 38 and this molding gap 38 is filled with the molten resin material 4. By this method, the glossy plastic composite material 1 capable of developing excellent metal or pearl like design properties can be easily molded without forming a flow linear mark 48.;COPYRIGHT: (C)2004,JPO&NCIPI