METHOD FOR INJECTION MOLDING OF THERMOPLASTIC RESIN USING SUPERCRITICAL FLUID

摘要

PROBLEM TO BE SOLVED: To provide a method for injection molding capable of partly and stably penetrating a supercritical fluid into a molten resin in a plasticizing cylinder of an injection molding machine.;SOLUTION: The problem is solved by the method for injection molding comprising metering the amount of filling of the molten resin in the plasticizing cylinder, retreating a screw by a specified distance without rotating the screw from a position of the screw when metering is finished and introducing the supercritical fluid into the molten resin in the plasticizing cylinder, detecting the pressure of the molten resin, and determining a position for starting injection of the screw from the pressure.;COPYRIGHT: (C)2007,JPO&INPIT