Casting method
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United States of America Patent
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-
Dec 8, 1987
Grant Date -
N/A
app pub date -
Feb 19, 1986
filing date -
Feb 27, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A consumable pattern of an expanded polyolefin resin and a bulk density of 0.025-0.012 g/cm.sup.3 is embedded in a mold body, a gating system leading to the pattern is formed in the mold body, and molten metal is poured into the gating system to volatilize and replace the pattern. The polyolefin resin is selected from noncrosslinked polypropylene resins, crosslinked polypropylene resins, crosslinked high-density polyethylene and mixtures thereof.
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