Gas venting device for molding operations

Details Gas venting device for molding operations Gas venting device for molding operations

1988-11-28

1991-03-05

Lin, Kuang Y.

Metal founding

Means to shape metallic material

Pressure shaping means

164410, 425420, 425812, B22D 1714

Patent

active

049970267

ABSTRACT:
A gas venting device for molding operations is disclosed having a valve for closing off a gas evacuation system from a mold when the mold cavity is filled with melt. A positive drive mechanism is provided for closing the valve, and a mechanism is provided for allowing the valve body to close more rapidly by action of the melt itself against the valve body in the event the melt advances more rapidly.

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patent: 4691755 (1987-09-01), Kuriyama et al.
patent: 4787436 (1988-11-01), Ozeki et al.

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