Method of casting metal articles
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United States of America Patent
Stats
-
May 8, 2012
Grant Date -
May 12, 2011
app pub date -
Nov 19, 2008
filing date -
Nov 19, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
During casting of metal articles, a mold is moved into a body or bath of molten metal. The mold is moved into a container which contains a portion of the body of molten metal. Heat is transferred at a first rate from the mold to a first portion of the body of molten metal disposed above the container. Heat is transferred at a second rate from the mold to the second portion of the body of molten metal at least part of which is disposed in the container. The container retards movement of molten metal relative to the mold to effect an increase in the temperature of the molten metal in the container and thereby retards transfer of heat from a portion of the mold disposed in the container to the body of molten metal. The mold enters the container through an opening at the upper end portion of the container. One or more additional openings may be provided at the lower end portion of the container.
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