A professional who operates vacuum casting machine to produce molten metal and pour castings of high density. Respnsibilities include:

• Removes ceramic mold from preheat oven, using tongs, and places it on lift in lower air lock of machine.
• Closes and clamps air-lock door.
• Inserts premeasured metal charge into upper air lock.
• Starts pumps to create specified vacuum in air locks.
• Pulls levers that cause ram to push charge into melting pot in vacuum chamber.
• Turns on current and adjusts temperature controls of furnace.
• Determines when molten metal is ready to pour by observing color through glass-covered opening, or by measuring temperature of molten metal with pyrometer.
• Moves controls that cause lift to raise mold from lower air lock to vacuum chamber.
• Pulls lever that causes furnace to invert and pour molten metal into mold.