WITHDRAWAL ELEVATOR MECHANISM FOR WITHDRAWAL FURNACE WITH A CENTER COOLING SPOOL TO PRODUCE DS/SC TURBINE AIRFOILS

摘要

A casting apparatus (100) includes a substantially stationary heating chamber (102) having an upper pouring opening (104) and a substantially open lower end; an outer cooling spool (112) disposed at a periphery of the open lower end of the heating chamber; a chill plate (122) having an aperture (124) therethrough and movable through the lower end of the heating chamber; a mold assembly (114) receivable in the chamber and movable through the lower end of the chamber and including peripherally disposed mold cavities (118) defining a substantially interior space (120) accessible through the open lower end of the chamber, an inner cooling spool (130) movable through the aperture of the chill plate and the open lower end of the mold assembly; a first actuator (128) for vertically displacing the chill plate and mold assembly; and a second actuator (138) for vertically displacing the inner cooling spool.