An expendable-mold, expendable-pattern casting process in which (1) polystyrene patterns are automatically produced in an aluminum die, (2) the pattern is dipped in or coated with a water-based refractory slurry, dried, and placed in a flask, (3) the flask is filled with sand which is compacted, and (4) molten metal is poured into the mold, vaporizing the pattern as it fills the mold cavity and completely replacing the space previously occupied by the polystyrene.
A) PolystyreneCasting
B) VaporMolding
C) SandPolystyrene
D) LostFoamCasting