Injection molding apparatus.

摘要

An injection assembly (10) for the injection molding of plastics and rubbers (M) is disclosed which is comprised of a cylinder (20), a nozzle (30) mounted at one end portion of the cylinder (20), a torpedo (40) fitted at its one end to the nozzle (30) and a plunger (50) arranged to reciprocate in the cylinder (20). The torpedo (40) has a hollow extension (42) extending opposite to the nozzle (30) and protruding in the cylinder (20), and the plunger (50) is provided therein with an elongate aperture (51) held in slidably movable relation to the extension (42) of the torpedo (40). Uniform heating of the molding material (M) is attainable at high speed.