Gas venting arrangement in injection molding apparatus and metho

Details Gas venting arrangement in injection molding apparatus and metho Gas venting arrangement in injection molding apparatus and metho

1987-12-03

1989-08-01

Lin, Kuang Y.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164113, 164154, 164305, B22D 1700

Patent

active

048526347

ABSTRACT:
Disclosed is a gas venting arrangement in an injection molding apparatus, and a method for venting gas out of the injection molding apparatus. The gas venting arrangement includes mold halves formed with a gas vent passage in fluid communication with a mold cavity and positioned downstream thereof, a gas vent control valve disposed at a downstream end portion of the vent passage, a detection member disposed at the vent passage for detecting injected material exceeding over the mold cavity, a valve driving mechanism connected to the gas vent control valve, and an electric control means connected between the detection member and the valve driving mechanism. The detection member generates a detection signal upon contact with the injected material and the valve driving mechanism is operated in response to the detection signal through the electric control means to operate the vent control valve.

REFERENCES:
patent: 4431047 (1984-02-01), Takeshima et al.
patent: 4463793 (1984-08-01), Thurner

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