Method to improve riser feedability for semi-permanent mold casting of cylinder heads
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United States of America Patent
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Nov 7, 2017
Issued Date -
N/A
app pub date -
Oct 15, 2015
filing date -
Oct 15, 2015
priority date (Note) -
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Abstract
A method of improving riser feedability in semi-permanent mold casting is disclosed. The method includes providing a first receptacle fluidly connected to a mold cavity and providing a second receptacle fluidly connected to a riser. Further, the method includes delivering molten metal to the first receptacle and conveying the molten metal into the mold cavity through a sprue. Delivery of molten metal to the first receptacle is terminated when the mold cavity reaches a predetermined fill level delivery of molten metal to the second receptacle is initiated. In certain embodiments, the first receptacle and the second receptacle are combined into a single receptacle and the sprue is connected to the mold cavity through a lower runner and is connected to the riser through an upper runner.
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