What does the caster do?

I take sand casting, and sand casting accounts for most of it. Casting requires furnace repairman, smelter (also called furnace worker), sand mixer, modeler, core-making worker and casting repairman (mainly welding repairman), and the above are production technicians. In addition, casting production also needs a large number of ordinary workers to do low-tech work such as cleaning, handling and charging. In addition, casting also needs some auxiliary technicians-chemists, mold repair and manufacturing workers, equipment maintenance workers (electricians, fitters, welders), chefs and so on.