ENG.EBRAHEEM MOBARAK: Expanded Polystyrene Process casting
Uses a mold of sand packed around a polystyrene pattern which vaporizes when molten metal is poured into mold §Other names: lost‑ process, lost pattern process, evaporative‑ process, and full‑mold process §Polystyrene pattern includes sprue, risers, gating system, and internal cores (if needed) §Mold does not have to be opened into cope and drag sections Figure ...