Casting of molten metal in an open ended mold cavity
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United States of America Patent
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Jul 17, 2001
Issued Date -
N/A
app pub date -
May 17, 2000
filing date -
Oct 21, 1997
priority date (Note) -
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Abstract
When the starter block commences reciprocating along the axis of an open ended mold cavity, with a body of start up material in tandem with it, successive layers of molten metal are relatively superimposed on the body of start up material, and layers thereof are confined to a first cross sectional area of the cavity but permitted to distend relatively peripherally outwardly from the circumferential outline of the first cross sectional area at relatively peripherally outwardly inclined angles to the axis while thermal contraction forces are generated in the respective layers and the magnitude of the forces is controlled so that the thermal contraction forces counterbalance the splaying forces in the respective layers and confer a free-formed circumferential outline on the resulting body of metal as it becomes form-sustaining.
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