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TITLE(s): WAX-PATTERN COATER (foundry) alternate titles: dipper Covers wax foundry patterns with coating compound to form shell mold used in lost-wax casting process: Dips pattern in suspension of silica sand and chemical binder. Coats pattern by sifting materials, such as sand or aluminum oxide, onto pattern; or places patterns in tumbling barrel, containing short fibers, to strengthen coating. Repeats coatings as specified to form shell. Examines pattern for evenness of coating. Places coated pattern clusters on cart and pushes cart into drying room, or places shell molds on conveyor of tunnel oven to dry mold interiors. May place patterns in steam-pressure vessel to melt pattern wax from shell. GOE: 06.04.32 STRENGTH: M GED: R2 M1 L1 SVP: 2 DLU: 77 | |||||||||||||||||||||||||||||||||||
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