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Unformatted text preview: 3) Problem 11.17, p 257 Referring to Figs 11.22 and 11.23, pp 249-250. Penetration is caused by liquid metal flowing into sand parts of core, cope, or drag (Fig. 11.23e) Corrective actions Possible defective consequence Reduce pouring temperature so the metal will solidify faster Cold shut and misrun due to premature solidification. Increase sand packing for denser sand Captured moisture in the sand cannot vent out easily, therefore, moisture can form porosity near the cast surface as pin holes or sand blow....
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- Spring '09
- lab group, 5 pt, wrong info