Gas-venting arrangement incorporated with a mold
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United States of America Patent
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-
Dec 25, 1984
Grant Date -
N/A
app pub date -
Nov 17, 1981
filing date -
Nov 20, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas-venting valve includes a sliding valve and either a fixed or movable valve chamber. The valve is closed by impingement of molten metal or melt flowing out of a cavity defined by the mold, in such a manner that the valve is forced to move relative to the valve chamber from a first position to a second position. The invention further includes a device for urging the valve to move relative to the valve chamber from the first position to the second position; a device for restraining the valve at the first position and preventing it from moving toward the second position, against the force of the urging device, until a part of the melt impinges against the valve; and a device for actuating the valve to return from the second position to the first position against the force of the urging device.
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