in action CASTINGS
Investment Casting Lightens Helicopter’s Load
Cast Component: Fan housing. Material: F357-T6 aluminum. Process: Investment.
Application: Environmental control system in commercial helicopter.
Dimensions: 3.48 x 3.48 x 1.02 in.
Casting Supplier: O’Fallon Casting, O’Fallon, Mo.
• T e casting reduced waste and cost compared to the previous version, which was machined from stock.
• T e investment casting process al- lowed the 13 inner blades to be cast between 0.07 and 0.03 in.
• T e one-piece casting reduced recurring costs by eliminating the need to assemble parts and incorporating multiple functions into a single part.
14 | METAL CASTING DESIGN & PURCHASING | Jul/Aug 2014
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