Elimination of shrinkage hole encountered down ingate/riser investment castings and is an effective way to increase production yield by rationally designing ingate/riser in shell-mold in the investment casting and using lunkerite proportion. Through rationally designing ingate /riser system and effectively using the lunkerite proportion, shrinkage hole and low production yield were eliminated effectively.
Investment Casting;
Lunkerite;
Production Yield;
Ingate/riser System
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