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"PLASTER MOLDER I"
Job Description and Jobs

Job Description:

  • 1) Lays out parting line on patterns and casts plaster molds according to blueprints, sketches, and oral instructions, applying knowledge of metal characteristics, pattern contours, and pouring procedures: Locates and scribes parting line on wood, metal, or plastic patterns, using measuring instruments, such as calipers, square, depth gauge, and straightedge.

  • 2) Mixes plaster powder and water according to standard formula.

  • 3) Places cope and drag on molding table.

  • 4) Pours liquid plaster into drag and positions pattern in plaster up to parting line.

  • 5) Removes excess plaster, using straightedge, and allows mold to harden.

  • 6) Places cope on completed drag, and makes depressions in plaster around drag pattern to ensure accurate joining of mold halves for casting.

  • 7) Brushes parting agent on surfaces of mold, pattern, and flask and pours liquid plaster into cope.

  • 8) Separates cope and drag after specified time and removes pattern.

  • 9) Repairs cracks and broken edges of molds, using molder's handtools, such as spoon, trowel, and slick.

  • 10) Removes excess plaster from molds, using knife or bandsaw.

  • 11) Joins cope and drag sections of mold together by aligning them in flask and pouring liquid plaster over them.

  • 12) May cut gates and risers into baked mold.

  • 13) May position cores in drag and assemble mold.

  • 14) May pour molten metal into molds, using hand ladle.

 

 

 


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End Of Job Description for: "PLASTER MOLDER I"
DOT:   777.381-034

Job Number: 7546