Resin molding method and apparatus

摘要

To provide a resin molding method and apparatus that may realize a sprue runnerless system with a very simple structure and at a low cost, a molten resin (4) is fed from a resin supply portion (1) into a pair of cavities (3) through a resin passage (2) such as a sprue portion (2A) and a pair of runner portions (2B) for molding the resin. The method includes the following steps of: moving a resin return member (5) toward the resin supply portion (1) after supplying the molten resin (4) into the cavities (3), the resin return member (5) being disposed so as to be projectable into the resin passage (2) and movable through the resin passage (2); and returning a waste molded resin (6) under a molten/solid condition within the resin passage (2) back into the resin supply portion (1) under a molten condition by the heat of the resin supply portion (1).