Sand for shell-molds coated with a mixture of a phenolic...

Details Sand for shell-molds coated with a mixture of a phenolic... Sand for shell-molds coated with a mixture of a phenolic...

B - Operations, Transporting

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B01J 13/02 (2006.01) B22C 1/02 (2006.01) B22C 1/22 (2006.01) C08K 3/26 (2006.01) C08K 9/08 (2006.01)

Patent

CA 1193920

ABSTRACT A process for the preparation of a resin-coated sand for use in shell-molding operations wherein the molding operation is designed for metals such as aluminum, magnesium and their alloys which have a lower-melting temperature that iron. The process involves the coating of foundry sand with a phenolic resin incorporating a carbonate and/or bicarbonate of elements selected from groups Ia, IIa, IIIb, IVb, Vb, VIb, VIIb or VIII. This process produces a resin-coated sand with improved shake- out properties of the casting molds.

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