Ceramic shell moulds, manufacture and use.

摘要

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.