A professional who forms molds used in casting copper. Respnsibilities include:

• Assembles metal casting frame on flat car, using wrench.
• Seals frame with fire clay, using trowel, and sprays interior of frame and core with bone ash to prevent adherence of molten metal to core.
• Pushes car under pouring spout of ladle.
• Moves lever to tilt ladle of molten copper and fill frame to indicated level.
• Pulls lever to lower core, attached to hydraulic press ram, to imbed core in molten copper.
• Turns valve to circulate water through core to solidify copper.
• Withdraws core when mold cools, dismantles frame, and removes mold.