A wax injection die or mould is made which is the exact negative replica of the part to be made. This contains pull out cores which form slots, holes etc.
Wax is injected into the mould under pressure so as to form a defect free wax pattern which is an exact replica of the part to be made. The patterns are also inspected for defects which may show up later on finished goods. Defective patterns are not repaired but discarded.
The wax pattern is assembled on to a wax sprue. This assembly is known as a tree or a cluster.
This cluster is dipped into a fine ceramic slurry, drained of excess slurry & held under a cascade of fine ceramic sand. These are high temperature resisting ceramics. This is the coat which the metal will come in contact with when the ceramic shell will be poured.
The shell is dipped in secondary coat slurry & coated with coarser grits till a layer about ¼” to 3/8” is formed on the cluster of wax patterns.
In between 2 coats the shell are dried at an appropriate room temperature & humidity.
The shell thus formed is de-waxed to drain out the wax by application of heat.
The empty shell is now heated to red heat.
The part is poured in the required metal like alloys of Carbon Steels, Stainless Steels & Copper alloys.
After the poured shell have cooled, they are subjected to high impulse hammering to remove the ceramic from the shells. The parts are separated from the cluster by gas cutting, gouging or by abrasive cut off. The gate stubs are ground to give a clean look.
The parts are inspected for dimensions & also for other defects, visually.
Dispatch & shipping - Trident Steels ships its investment cast parts to countries like USA, Spain, United Kingdom, Germany etc. and also to customers within India.