Job Description:

• 1) Operates vacuum casting machine to produce molten metal and pour castings of high density: Removes ceramic mold from preheat oven, using tongs, and places it on lift in lower air lock of machine.

• 2) Closes and clamps air-lock door.

• 3) Inserts premeasured metal charge into upper air lock.

• 4) Starts pumps to create specified vacuum in air locks.

• 5) Pulls levers that cause ram to push charge into melting pot in vacuum chamber.

• 6) Turns on current and adjusts temperature controls of furnace.

• 7) Determines when molten metal is ready to pour by observing color through glass-covered opening, or by measuring temperature of molten metal with pyrometer.

• 8) Moves controls that cause lift to raise mold from lower air lock to vacuum chamber.

• 9) Pulls lever that causes furnace to invert and pour molten metal into mold.