Apparatus and method for the injection molding of thermoplastics

Abstract From the Canadian patent

Abstract of the Disclosure A nozzle for the injection molding of, thermoplastic materials includes a nozzle body having a first bore for establishing a flow path for a molten thermoplastic. A first end of the nozzle body is adapted for fluid connection with a sprue of an associated mold body, and a second end thereof is adapted for fluid connection with an end of an associated injection molding machine. The nozzle body also includes a second bore. A first valve assembly which is adapted for reciprocating movement in the nozzle body second bore, is provided to control the flow of plastic through the nozzle body. The first valve member includes a body having a tip portion and a fluid passage …