Melting sand-blasting gun

The utility model discloses a meltallizing sand-blasting gun, and relates to the technical field of sand-blasting guns. The utility model comprises the following components. Comprising a sand blasting gun, and a heat dissipation device is arranged in the sand blasting gun; the cooling device comprises a gun body, a first hollow frame is fixedly connected to the side face of the gun body, a motor is fixedly connected to the side face of the first hollow frame, a first rotating rod is fixedly connected to the bottom of the motor, and a first bevel gear is fixedly connected to the side face of the first rotating rod. A second rotating rod rotates to drive a windmill on the other side to start to rotate, blowing heat dissipation is conducted on a sand blasting gun body through a first heat dissipation plate, when a first bevel gear rotates, a third bevel gear perpendicularly meshed with the front face is driven to start to rotate, and a fifth rotating rod drives the second windmill on the other side to start to r