details DESIGN


Offsetting the parting line to capture the critical features of the casting eliminated the need for additional cores or loose pieces in the permanent mold.


• A casting’s parting plane also should facilitate the support of the cores. T e manifold’s water jacket core prints are locked in between the two mold halves.


• Parting plane and orientation are key steps in the early stages of the casting design and development process. Multiple options should be evaluated, using casting process modeling upfront.


Utilizing cross ribs provides additional stiffness to the manifold.


• External or internal ribs provide additional stiff - ness to the casting. However, caution must be taken to avoid any potential hot tearing or core weakening or collapse during the casting process.


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.


Mar/Apr 2015 | METAL CASTING DESIGN & PURCHASING | 21


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