INJECTION MOLDING METHOD WITH IMPROVED WELD STRENGTH, INJECTION MOLDING DIE AND INJECTION MOLDED PRODUCT

摘要

PURPOSE: To provide the injection molding method in which a weld section is strengthened extremely effectively and also the outer appearance of the weld section is improved. ;CONSTITUTION: A mold with a cavity 1 constituted in a manner of forming a rib 4 of wall thickness thinner than any other wall thickness of a molded product on its periphery or a boss of small diameter in the vicinity of a weld section formed by joining molten resin introduced from a nozzle of a molding machine and branched therefrom in the mold cavity 1 is used. The weld section is formed by feeding molten resin into the cavity 1, and then the movement at the weld section is generated by flowing and filling the resin in the rib 4 or the boss of the cavity 1, and the resin on one side of the weld section is fed forcibly into the resin on the other side across the weld section to strengthen the weld section.;COPYRIGHT: (C)1993,JPO&Japio