The process uses metal moulds to produce expendable
wax-based patterns of the part to be cast
The patterns are mounted and 'invested' (coated)
with a ceramic material by a process in which successive ceramic
layers are deposited and dried until a suitable 'shell' is formed
The wax is removed from the shell using high
pressure steam resulting in a precision mould into which the molten
metal can be poured
After cooling, the mould is broken open, the
casting is removed and is then finished
wax injected into metal
mould to make wax pattern
patterns assembled onto
runner bars
dipping the assembly into
a ceramic slurry
building the shell with
layers of ceramic particles
