Also known as lost wax and precision casting, is based on surrounding an expendable pattern, typically pattern wax, in a ceramic mould and then removing (by melting or vaporizing) the pattern prior to pouring molten alloy into the mould.
A guide as to the surface finish that is achievable using different casting techniques is shown below (the solid area shows the normal limits achievable using these techniques).
Lost Foam Casting
A casting method using foamed plastic cores, giving the surface of the castings the appearance of styrofoam.
Lost Wax Casting
Also known as investment or precision casting, it is based on the use of a mould that is only used once.
See also: Casting.
Subjects: Mechanical Engineering
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