Option C - Middle Parting Line with Spline Down

In Option C, the spline section is oriented down in the drag (the lower mold cavity). This orientation minimizes the risk of flaw segregation in the spline feature.

But this mold design has one critical shortcoming --

• The parting line is at the midsection of the mold. The molten metal drops down into the mold and will produce more turbulent flow, introducing bubbles and oxides.

For this reason, Option C is not the best mold design.

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