Injection molding method, injection mold, and injection molded article.

摘要

In injection-molding a thermoplastic resin, use is made of a mold provided with a resin well protruding from a molded article cavity or a runner on at least one of separated resin passages starting from a point where an injected molten filling resin is separated into streams and terminating at a weld formed by the union of the separated resin streams, and a resin is poured into the resin well after the formation of a weld through the feed of the molten resin into the molded article cavity to cause the migration of the resin at the weld, thus forcing the resin on one side of the weld into the resin on the other side of the weld to strengthen the weld. The invention also includes the above defined mold and molded articles produced by the method. <IMAGE>