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Resin-coated sand for shell-molds and method for producing same
Resin-coated sand for shell-molds and method for producing same
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机译:壳模用树脂包覆砂及其生产方法
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摘要
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 than 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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