What does a Molding and Casting Worker do?

Perform a variety of duties such as mixing materials, assembling mold parts, filling molds, and stacking molds to mold and cast a wide range of products.

Jobs Roles

  • Brush or spray mold surfaces with parting agents or insert paper into molds to ensure smoothness and prevent sticking or seepage.
  • Clean, finish, and lubricate molds and mold parts.
  • Separate models or patterns from molds and examine products for accuracy.
  • Pour, pack, spread, or press plaster, concrete, liquid plastic, or other materials into or around models or molds.
  • Operate and adjust controls of heating equipment to melt material or to cure, dry, or bake filled molds.
  • Read work orders or examine parts to determine parts or sections of products to be produced.
  • Load or stack filled molds in ovens, dryers, or curing boxes, or on storage racks or carts.
  • Set the proper operating temperature for each casting.
  • Measure and cut products to specified dimensions, using measuring and cutting instruments.
  • Remove excess materials and level and smooth wet mold mixtures.
  • Melt metal pieces, using torches, and cast products, such as inlays and crowns, using centrifugal casting machines.
  • Select sizes and types of molds according to instructions.
  • Trim or remove excess material, using scrapers, knives, or band saws.
  • Align and assemble parts to produce completed products, using gauges and hand tools.
  • Withdraw cores or other loose mold members after castings solidify.
  • Bore holes or cut grates, risers, or pouring spouts in molds, using power tools.
  • Construct or form molds for use in casting metal, clay, or plaster objects, using plaster, fiberglass, rubber, casting machines, patterns, or flasks.
  • Verify dimensions of products, using measuring instruments, such as calipers, vernier gauges, or protractors.
  • Tap or tilt molds to ensure uniform distribution of materials.
  • Patch broken edges or fractures, using clay or plaster.
  • Locate and scribe parting lines on patterns, using measuring instruments, such as calipers, squares, or depth gauges.
  • Smooth surfaces of molds, using scraping tools or sandpaper.
  • Measure ingredients and mix molding, casting material, or sealing compounds to prescribed consistencies, according to formulas.
  • Assemble, insert, and adjust wires, tubes, cores, fittings, rods, or patterns into molds, using hand tools and depth gauges.
  • Repair mold defects, such as cracks or broken edges, using patterns, mold boxes, or hand tools.
  • Engrave or stamp identifying symbols, letters, or numbers on products.
  • Place forms around models and separately immerse each half portion of a model in plaster, wax, or other mold-making materials.
  • Operate molding machines that compact sand in flasks to form molds.
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