THE INVESTMENT CASTING PROCESS
1.Tooling And Pattern Making
A tool is built to customer-provided specifications (A).Cold wax is then injected into the tool to create a wax pattern/prototype (B) that will hold precise dimensional requirements in the final casting.
2. Pattern Assembly
The wax patterns are assembled onto the sprue.
3. Dipping And Coating
Successive layers of ceramic(A) and stucco (B) are applied to the sprue assembly to form a hard shell.
4. De-Waxing And Firing
The molds are flash-fired to remove the wax and spruematerials and then heated to 1,800°and placed on a sand bed, ready for pouring.
Molten metal, up to 3,000°, is poured into the hollow mold and then cooled.
The ceramic shell is broken off, and the individual castings are cut away.
Excess metal is removed, surfaces are finished, and castings are heat treated.
8. Testing And Inspection
Castings undergo thorough testing and inspection to ensure that they meet dimensional tolerances and specifications.
9. Packing And Shipping
Castings are securely packaged for shipping to the customer.