Sand making machine for producing anti-cracking reinforced cast steel sand

The utility model discloses a sand making machine for anti-cracking reinforced cast steel sand production, which comprises a mounting seat, the upper surface of the mounting seat is fixedly connected with a support column, the upper surface of the support column is fixedly connected with a working box, the side surface of the working box is fixedly connected with a lining plate, the side surface of the working box is provided with a second threaded hole, and the lining plate is fixedly connected with a second threaded hole. A first threaded hole is formed in the outer surface of the lining plate, and a screen is arranged on the bottom inner wall of the working box. And the grinding structure comprises an air cylinder, a movable plate and a grinding tip. The movable plate reciprocates back and forth through the air cylinder, large raw materials are crushed preferentially through the crushing tips at the two ends, the raw materials with the proper size fall into the working box from the discharging opening and