Pump shell sand mold forming box

The utility model provides a pump case sand mould forming box, which comprises a bottom plate and a back plate, a convex mould is fixed on the top surface of the bottom plate, two first holding rods are connected to one side of the bottom plate, two second holding rods are connected to the outer wall of the back plate, and side baffle components with positioning structures are vertically connected to two sides of the back plate. The two sets of side blocking assemblies are arranged in a mirror image mode, a front plate is connected between the two sets of side blocking assemblies, the front plate is adjusted and positioned through the two sets of side blocking assemblies, two third holding rods are connected to the outer wall of the front plate, the front plate, the back plate and the two sets of side blocking assemblies are connected to form a frame structure, and the bottom face of the frame is attached to the top face of the bottom plate. According to the utility model, the position of the front plate is a