Patent ID: 7303712
Filing Date: 2007-12-04
Classification: B29C,B29K

Abstract:
1. A method of injection molding and decoration molding a molded product, comprising: providing a cavity mold for injection molding, a cavity mold for decoration molding, and a core mold; setting said cavity mold for injection molding and said core mold at a hardening temperature of a thermoplastic resin and setting said cavity mold for decoration molding at a thermosetting temperature of a decorative coating material within a range of from 80° C. to 140° C.; injection molding the thermoplastic resin to form a molded product between said cavity mold for injection molding and said core mold; releasing said cavity mold from said injection molded product held on said core mold; mounting the decorative coating material composed of a liquid thermosetting composition at least on a part of the top of said injection molded product prior to clamping said product within said cavity mold for decoration molding, said decorative coating material having a viscosity of 3000-100,000 mPa·s (25° C.); locating said injection molded product held on said core mold within said cavity mold for decoration molding; and decoration molding a thin decorative film having a thickness of within a range of 50 to 200 μm over the surface of said injection molded product by compression spreading said decorative coating material within said cavity mold for decoration molding over the whole surface to be decorated by clamping said cavity mold for decoration molding with said core mold, wherein a space is primarily formed between the injection molded product and a cavity surface of said cavity mold for decoration molding facing the top and sides of said injection molded product, the space at the top of the injection molded product is reduced as the mold clamping advances and said decorative coating material on the top of said injection molded product is compressed between the surface of said cavity mold for decoration molding and said injection molded product at a rate within a range of 1-10 mm/sec by the mold clamping.