GREEN SAND FOR CASTING OF STEEL CASTINGS METHOD FOR PRODUCING SAME AND METHOD FOR PRODUCING METAL CASTINGS USING SAID GREEN SAND

摘要

The present invention relates to a sand mold for casting cast steel, comprising: sand, a point filling material, and a concave portion including a cavity for casting at least a cast steel, the sand casting comprising a casting material containing 3 parts by mass or less of carbon content with respect to 100 parts by mass of sand, A coating layer of a thermosetting resin is formed on the surface of the coating layer, and the coating layer has a mean hardness (measured with a magnetic hardness meter) of 50 to 95 and a thickness of 0.5 to 2.5 mm.;