FIELD: foundry. SUBSTANCE: method involves filling core manufacture rigs with mixture; compacting mixture and treating (blowing) with carbon dioxide in the direction away from inoperative part to operating surface. Prior to filling core manufacture rigs with mixture, rigs are heated to temperature ranging between 150 and 350 C. Upon compaction, mixture is held in contact with heated rigs till the moment of thermal strengthening of surface layer of core (mold) through the thickness of up to 25 mm, depending on weight of core. EFFECT: increased efficiency, simplified method and improved quality of cores and molds. 2 dwg
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