1 - A wax pattern is produced from a machined metal cavity die.
2 - Patterns are assembled on to a wax runner to form an assembly.
3 - 4 The assembly is invested or coated with a refractory slurry and then the wet coated assembly is stuccoed with dry refractory particles.
5 - The wax is removed from the completed mould.
6 - The dewaxed mould is fired..
7 - Metal is cast into the hot mould.
8 - Following cooling to room temperature the refractory shell is removed.
9 - The castings are cut away from the central sprue using a high speed friction saw.
10 - Runners and risers are removed.
11 - Some castings are processed through heat treat to meet required mechanical properties.
12 - The finished castings are inspected.
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