A self-developed instrument for the high temperature mechanical properties of resin sand was adopted to analyze the influence of the type of resin sand and the addition amount of main components on the high temperature heat tolerance time of resin sand under the reducing atmosphere.The results reveal that the high temperature heat tolerance time of TEA resin sand

no-bake furan resin sand and phenolic resin coated sand is increased successively.In test content range

the high temperature heat tolerance time of resin sand is increased with the increase of resin addition and decreased with the increase of curing agent addition.