A professional who tends conveyor-screw coremaking machine that extrudes sand cores having uniform cross section. Respnsibilities include:

• Installs specified core tube and conveyor screw in machine, using handtools.
• Shovels sand into hopper, and tamps it down by hand.
• Positions core plate at opening of core tube, and starts motor-driven or hand-operated conveyor screw which forces sand through core tube and onto core plate.
• Cuts core at core tube opening when core fills plate.
• May tend oven to bake cores.
• Cuts baked cores to specified lengths with saw.