Paint spraying tool

The utility model discloses a paint spraying tool which comprises an upper cover and a lower cover, the upper cover and the lower cover are fixedly connected through vertical columns distributed on the circumference, a flange plate is arranged in the center of the upper cover, a flange shaft is fixed on the flange plate, a cylindrical pin transversely penetrates through the flange shaft, and the cylindrical pin penetrates through the upper cover. A pressure plate is arranged between the flange plate and the upper cover, and the flange plate penetrates through the pressure plate through a long bolt and is fixedly connected with the upper cover; the device is used in cooperation with a mechanical arm, assembly line operation, automatic mechanical operation and manual assistance are achieved, the manual operation amount is reduced, the labor intensity is greatly reduced, slurry spraying and sand hanging of large-size complex casting wax molds can be met, a plurality of casting wax molds can be fixed on a large s