Patent ID: 6998076
Filing Date: 2006-02-14
Classification: B29C,B29L

Abstract:
1. An injection compression molding method of molding a thin molding, comprising: forming a molding space by joining together a movable mold and a stationary mold, said movable mold being mounted to a movable die plate and said stationary mold being mounted to a stationary die plate, said movable die plate being movable toward and away from the stationary die plate with a mold clamping unit, said mold clamping unit being configured to control a clamping pressure for pressing the movable die plate toward the stationary die plate while an injecting unit is injecting a molding material into the molding space; injecting the molding material into the molding space by the injection unit; controlling the mold clamping unit in such a manner that any resistance is not exerted substantially against flow of the molding material injected into the molding space by the injection unit, during the injecting; controlling the mold clamping unit in such a manner that a predetermined preliminary pressure is applied to the molding material that has been injected into the molding space by the injection unit, during the injecting; controlling the mold clamping unit in such a manner that a predetermined transfer pressure is applied to the molding material that has been injected into the molding space by the injection unit to transfer a desired pattern of a thin molding, after the injecting, and controlling the mold clamping unit in such a manner that a predetermined resistance is exerted against the flow of the molding material injected into the molding space by the injection unit before controlling the mold clamping unit in such a manner that any resistance is not exerted substantially against the flow of the molding material injected into the molding space by the injection unit.