Polishing device for sprue bush sprue

The utility model relates to the technical field of sprue bush machining, in particular to a sprue bush sprue polishing device which is convenient for cleaning powder scraps and avoids influencing the polishing effect. Comprising a base, a driving motor, a sliding plate, a screw block, a polishing motor, a polishing wheel, a positioning block, two sets of supporting rods, a collecting box, a dust collector, a connecting sleeve and a hose, four sets of supporting legs are arranged at the bottom end of the base, the driving motor is fixedly installed at the right end of the driving motor, and a lead screw is arranged at the output end of the driving motor and rotationally installed in the base; the polishing motor is fixedly connected with the right end of the sliding plate, the polishing wheel is fixedly installed at the output end of the polishing motor, the fixing plate is arranged at the top end of the base, the two supporting rods are fixedly installed between the fixing plate and the positioning block, an