Patent ID: 7615181
Filing Date: 2009-11-10
Classification: B29C,B29K,Y02W

Abstract:
1. A rubber injection molding device comprising: a mold having a molding cavity therein; an injecting machine including an injection cylinder having an injection chamber for storing a rubber therein, and an injection plunger for injecting the rubber from the injection chamber into the molding cavity by an advancement of the injection plunger; a feed machine having a feed cylinder with a feed aperture formed at a tip end thereof and connected with the injection chamber through a feed duct, and being adapted to feed into the injection chamber, through the feed duct the rubber in a mixed state, and a pushing assembly which has a piston that pushes into the injection chamber the rubber that remains within the feed duct after a feed operation of the rubber by the feed machine, and the piston directly closes a connecting aperture between the feed duct and the injection chamber at a forward travel limit of the piston.