Method for producing metal castings

Details Method for producing metal castings Method for producing metal castings

B - Operations, Transporting

22

C

22/166, 403/9

B22C 7/02 (2006.01) C08J 9/14 (2006.01) C08J 9/28 (2006.01)

Patent

CA 1254697

ABSTRACT Metal castings having reduced residual carbon ash and surface flaws are produced by an evaporative pattern casting process. in which an organic foam pattern is vaporized upon contact with a molten metal leaving a metal replica of the pattern. The organic foam used in this process comprises a polymer formed by polymerizing CO2 with one or more oxirane compounds.

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