Foundry Mold and Coremakers

Make or form wax or sand cores or molds used in the production of metal castings in foundries.

Job Task

• Forms and assembles slab cores around pattern and positions wire in mold sections to reinforce mold, using hand tools and glue.
• Lifts upper mold section from lower and removes molded patterns.
• Moves and positions workpieces, such as mold sections, patterns, and bottom boards, using cranes, or signals others to move workpieces.
• Pours molten metal into mold, manually or using crane ladle.
• Cleans and smoothes molds, cores, and core boxes, and repairs surface imperfections.
• Rotates sweep board around spindle to make symmetrical molds for convex impressions.
• Operates ovens to bake cores or furnaces to melt, skim, and flux metal.
• Sifts sand and packs sand into mold sections, core box, and pattern contours, using hand or pneumatic ramming tools.
• Cuts spouts, runner holes, and sprue holes into mold.
• Sprinkles or sprays parting agent onto pattern and mold sections, to facilitate removal of pattern from mold.
• Positions patterns inside mold sections and clamps sections together.
• Positions cores into lower section of mold and reassembles mold for pouring.

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