Ceramic shell moulds, manufacture and use

Details Ceramic shell moulds, manufacture and use Ceramic shell moulds, manufacture and use

B - Operations, Transporting

22

C

22/164

B22C 1/00 (2006.01) B22C 9/04 (2006.01)

Patent

CA 1223112

ABSTRACT A thin shell ceramic mould for use in metal casting is formed by applying a thin coating of a suitable material and binder to an expandable pattern, e.g. expanded polystyrene, having a density of about 30 to 50 kg/cu.m. The coated pattern is subjected to heat at a temperature of about 1000°C for 10 minutes to burn out the pattern and cure the coating. The ceramic shell is made just thick enough to be handled.

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