Question
Download Solution PDFThe casting process that employs a wax pattern coated with a ceramic shell to make the mould, is ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Investment casting process:
- The investment casting process also called the lost-wax process begins with the production of wax replicas or patterns of the desired shape of the castings
- It is preferred where intricate shapes are required like sewing machines, firearms, surgical and dental devices, turbine blades, gear impeller, hand tools, cranks, and levers
The investment casting process or lost wax process has the following steps:
- Produce expendable wax, plastic, or polystyrene patterns.
- Assemble these patterns onto a gating system
- Investing or covering the pattern assembly with a refractory slurry
- Melting the pattern assembly to remove the pattern material
- Firing the mould to remove the last traces of the pattern material
- Pouring molten metal
- Knockout, cutoff, and finishing
As in this casting, the pattern disappears so this is also known as lost pattern casting.
Last updated on May 28, 2025
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