METHOD OF INJECTION MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method of injection molding which can inhibit the generation of a silver line. SOLUTION: The method of injection molding during the injection filling with a plastic (10) comprises the step of heating a mold (20) so that the temperature of the surface of the cavity of a mold (20) may rise higher than the flow beginning temperature of a plastic (10), the step of starting the cooling of a mold (20) after the lapse of a prescribed time from the end time of the heating of a mold (20), and the step of adjusting the injection speed so that the pressure of the plastic located in the internal surface side of the cavity of a mold (20) may be higher than the saturation pressure at least during the period when the skin temperature of a plastic (10) is maintained higher than the flow beginning temperature. COPYRIGHT: (C)2008,JPO&INPIT