METHOD OF PREPARING SAND FOR MANUFACTURE OF GYPSUM MOLDS AND CORES IN PRODUCTION OF CASTINGS FROM NONFERROUS ALLOYS

摘要

foundry. SUBSTANCE: method includes preparation of aqueous solution of aluminochromophosphate binder with surfactant; treatment of obtained solution with ultrasound for 3-10 min; mixing of obtained solution with prepared sand of dry ingredients by bubbling with simultaneous application of ultrasonic field for 3-8 min. Treatment of aqueous solution of aluminochromophosphate binder and surfactant with ultrasound improved its wetting ability. EFFECT: higher quality of produced castings due to improved rheological properties of sands and mechanical and physical characteristics of gypsum molds and cores. 2 cl, 2 tbl, 2 ex