Patent ID: 6428732
Filing Date: 2002-08-06
Classification: B29C,H01L

Abstract:
An insert-molding method in which an insert product is arranged in a cavity of a mold and held by at least one holding pin, said method comprising:pouring a molten synthetic resin into said cavity; retracting said holding pin from said cavity to obtain an insert-molding product, wherein said insert product is covered with said synthetic resin, and extruding the synthetic resin into the space where said holding pin was coated prior to retracting; wherein: said holding pin is retracted from a space within said cavity after said cavity is filled with said synthetic resin, the synthetic resin is introduced into the space where said holding pin was located prior to said retracting, and said space is under pressure of the surrounding synthetic resin; and at least one moving pin is placed adjacent to said holding pin, and said moving pin is moved in the direction of the cavity to extrude and fill said synthetic resin into the space where said holding pin used to be located after the holding pin is retracted from said cavity and before said synthetic resin is cooled.