Methods for preparing a formed cellular plastic material...

Details Methods for preparing a formed cellular plastic material... Methods for preparing a formed cellular plastic material...

B - Operations, Transporting

22

C

22/161

B22C 7/02 (2006.01) B22C 9/04 (2006.01)

Patent

CA 1314381

ABSTRACT Formed patterns and core assemblies, wholly or partially formed from certain destructible cellular plastic materials have a decreased tendency to form nonvolatile residue. An excess of nonvolatile residue results in carbon-containing voids, often called carbon defects. 34,983-F

543120

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