The production process of the thermal coated sand production line is briefly described as follows: the raw sand is lifted to a new sand hopper by a hoist, and then enters the heater for heating after being quantified; when the temperature reaches the required, it is discharged into the sand mixer, and resin is added manually. After the coating is completed, start to spray the curing agent urotropine aqueous solution. Then add the release agent calcium stearate, automatically blow, cool, and crush, and then unload it into the cooling screen. After coarse screening, cooling, and fine screening, it is lifted to the secondary cooling sand hopper and cooled again, and it can be directly bagged. Film sand. The thermal coated sand production line has the characteristics of good fluidity, good wear resistance, good fire resistance, and good heat resistance. Therefore, the castings produced also have the advantages of high strength, high temperature resistance, low expansion, and good processing effects.