An expendable-mold, permanent-pattern casting process that works as follows: (1) a pattern made of ferrous metal or aluminum is heated, coated with a parting agent, and clamped to a box or chamber that contains fine sand mixed with a resin binder in the bottom; (2) the box is rotated upside down to allow the sand+resin to coat the pattern; (3) the box is heated which hardens the sand+resin into a shell; (4) the shell is removed from the pattern using ejector pins; (5) two half-shells are made by applying steps 1-4 in succession; (6) the two half-shells are clamped together to make the mold.
A) ShellCasting
B) ResinMolding
C) BinderShell
D) RotationalMold