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detailset DESIGN


Orienting features to the parting plane opens up design freedom.


• Carefully designing feature placements with reference to the parting plane allows for as-cast features and minimum machining stock.


As-cast cored pockets eliminate expensive machined slot operations, thereby reducing lead time.


• Sand cored as-cast slots need to be designed carefully to avoid metal penetration and sand burn-on, leav- ing a clean surface.


• Where the core is surrounded by metal from both sides, its critical thickness is driven by the section thickness of the metal and cross- section thickness of the core.


• Using casting process modeling can ensure the cored pocket is not going to pose metal penetration and sand burn problems, which would make removing the core diffi cult.


Hot spot inside pocket area


Super heated core sand in the pocket


Jiten Shah is president of Product Development & Analysis (PDA) LLC (www.pda-llc.com), Naperville, Ill., and a 25-year casting design and manufacturing veteran.


May/Jun 2015 | METAL CASTING DESIGN & PURCHASING | 19


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