Other

Fairchild Industries, Inc.

Jesus M Osuna-Diaz

Robert D Ameel

An injection nozzle has an annular gate directing a flow of plastic melt into an annular opening in a mold cavity. A valve sleeve is shifted over the gate to control outflow of plastic melt.

Injection molding with annular gate and sleeve shutoff valve

An injection nozzle has gearing which drives a valve pin to open and close a mold gate, with a venting chamber in a nozzle body allowing vapors to escape before reaching the gearing to avoid fouling of the gearing. The valve pin is actuated by a hydraulic cylinder driving the gearing, which includes a pair of pinion gears driving gear teeth on either side of the upper end of the valve pin. An adjustable stop is provided limiting piston travel in either direction, allowing adjustment of both the closed and open positions of the valve pin.

Valve pin actuation system for an injection nozzle

Injection molding apparatus is disclosed having an actuation system for operation of a shut off valve pin, movably mounted in a valve gate, the system including a first gear rack connected to the valve pin, a first pinion gear driven by the first gear rack connected at one end of a cross shaft, a second pinion gear at the other end of the cross shaft, and a externally mounted two way power cylinder operating a second gear rack to rotate the second pinion gear in mesh therewith so that both pinion gears rotate together, and the valve pin is reciprocated by operation of the power cylinder. The power cylinder is mounted for angular adjustment about the axis of rotation of the pinion gears and cross shaft to enable ready adjustment of the closing position of the valve pin in the valve gate.

Injection molding apparatus with shut off valve pin actuation system

An injection molding nozzle for use with a flowable molding material in a mold die having an elongated member with a fluid passage extending through it and a cap member having an exit orifice in fluid communication with the fluid passage of the elongated member. A torpedo member is located partially in the fluid passage of the elongated member and the torpedo member has a projection that extends into the exit orifice in the cap member to provide heat to the adjacent flowing molding material when the molding nozzle is in use. The heat provided by this projection on the torpedo member prevents the flowing molding material in the nozzle exit from solidifying and interrupting the molding process.

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Rochester Hills, MI, United States of America

Jesus M Osuna-Diaz