SAND FOR MAKING CASTING CORES

摘要

FIELD: casting processes and equipment, namely sands for producing casting cores for aluminum castings and for thin-wall castings of cast iron. ^ SUBSTANCE: sand contains refractory filler such as quartz sand and binder such as solution with density 1.2 -1.3 g/cm3 of polystyrene in toluene at next relation of ingredients (mass. p.): refractory filler, 95 -96; solution of polystyrene in toluene, 4 - 5. ^ EFFECT: improved strength and knocking out capability of sand. ^ 1 tbl