A professional who covers wax foundry patterns with coating compound to form shell mold used in lost-wax casting process. Respnsibilities include:

• 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.