Option A - Bowl Orient Up
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In Option A, the bowl is oriented with the
rim up in the cope, formed by the bowl core.
But, if inclusions or voids form, they will
segregate in this orientation in the top of the casting and be trapped in the rim and
interior surface of the bowl.
This increases the chances for flaws in the
machined surface of the bowl.
==> In addition, the cores for the
bowl and the rib pockets will be sitting high in the mold and will be more difficult to
position and secure in the cope.
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