Die cast vacuum valve system
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United States of America Patent
Stats
-
Apr 7, 1992
Grant Date -
N/A
app pub date -
Mar 14, 1990
filing date -
Mar 14, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A die casting vacuum valve has a cover die block and ejector die block. A cushion member is positioned in the cover die block and a reciprocating member is positioned in the ejector die block such that upon reciprocation of the reciprocating member, it contacts the cushion member and cover die block to seal the reciprocating member with the cover die block and the surrounding surface. A controller mechanism controls the reciprocation of the reciprocating member such that the reciprocating member contacts the cushion when the molten material enters the mold cavity and slot to prevent further flow of the molten material in the slot past the reciprocating member.
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