SEE PROFILE

wax pattern in the lost wax casting, the shell fabricated outside the foam pattern would produce a relatively high surface roughness of the castings [7-9]. In the solid mould investment casting technique, lots of factors like pattern thick-ness, type of metal and alloy, average particle size of investment powder, type of casting machine, etc. effect the surface quality of the castings [10]. However, the surface condition of the pattern is the most significant one. Defeng et al. studied wax film and nitro-cellulose film formations on the EPS foam patterns to improve the surface quality of the shell mould investment cast parts an