A pattern made of wax is used to make casting. wax pattern made Injecting wax a Die. The Wax Assembly is dipped into a refractory slurry.The Assembly after a such wet dip is coated with refractory grains, called “Stucco”.After removal of the wax, the resulting hollow “Mould Shells” are pre-heated in a Shell Pre-heating Furnace to make them strong enough to withstand the metal pressure, when hot liquid metal is poured into the shell.
