Countergravity metal casting apparatus and process
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United States of America Patent
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-
Dec 20, 1988
Grant Date -
N/A
app pub date -
May 7, 1987
filing date -
May 7, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for counter-gravity casting of molten metal, in a gas permeable mold with a fill passage upper end above the lateral communication of the passage with other mold cavities. The mold is filled by low pressure in a chamber sealed about the mold while the mold fill passage is communicated with the molten metal. Provision is made for maintaining, during filling, the upper part of the mold fill passage at a lower pressure than that in the chamber external to the mold.
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