Mold-masters Limited

Mold-masters Kabushiki Kaisha

Isao Okamura

George T Olaru

An injection molding apparatus includes an injection piston that is slidable within a nozzle having a movable valve gate pin. The injection piston is movable from a retracted position to an extended position in order to force melt towards a mold cavity. A valve is located at a forward end of the piston to selectively block communication between a recess, which is provided in an outer wall of the piston adjacent the valve, and a melt chamber of the nozzle. Movement of the injection piston from the retracted position to the extended position causes the valve to close so that the predetermined volume of melt located below the valve is forced into the mold cavity, when the valve gate pin opens the mold gate.

Metering device for a nozzle of a hot runner injection molding apparatus

Metering device for a nozzle of an injection molding apparatus

The heat of a heater sheath wire is both the heat that is directly transmitted to a heated nozzle main body, and the heat that is indirectly transmitted to the heated nozzle main body via a metal strip and both provide the effect of efficiently heating the heated nozzle main body and producing a significant increase in the performance. The heated nozzle for plastic injection molding according to the present invention is configured so as to have a spiral-shaped groove on its outer periphery, the heater sheath wire that is pressed into the spiral-shaped groove and the metal strip that is wound around the surface of the outer periphery of the heated nozzle main body and is welded to the heated nozzle main body.

Growing community of inventors

Sagamihara, Japan

Isao Okamura