Molding sand mixing device for casting

The molding sand mixing device for casting comprises a crushing box, the left side and the right side of the crushing box are fixedly connected with the upper end of a bottom plate through a plurality of sets of connecting pieces, T-shaped sliding grooves are formed in the two sides of the bottom end of the crushing box, a screening box is arranged at the bottom end of the crushing box, and a mixing box is fixedly installed on the right side of the upper end of the bottom plate. Fixing plates are fixedly mounted on the two sides of the upper end of the bottom plate, and a servo motor is fixedly mounted in the middle of the outer side of the fixing plate at the front end. Sand grains are crushed in the crushing box, the screening box can move in a reciprocating mode through the moving assembly, the screening effect is improved, the forming rate of the sand grains is improved, and due to the fact that the screening plate in the screening box is obliquely arranged, under the action of gravity, the screening effe