Metal riser tube cleaning device

The invention discloses a metal riser tube cleaning device and belongs to the field of aluminum alloy counter-pressure casting main product shell production. Two oppositely arranged sliding assemblies are mounted on the right side wall of a fixed baffle and located at the front end and the rear end of the fixed baffle correspondingly; an outer circle cleaning tool matched with the metal riser tube is further installed on the inner side of the sliding assembly, the left end of the oil cylinder is installed on the oil cylinder fixing plate, an inner circle cleaning tool is installed at the left end of a telescopic shaft of the oil cylinder, and a plurality of multi-step-shaped scrapers are arranged on the outer circle of the inner circle cleaning tool. And a plurality of chip removal grooves are axially formed in the outer circle of the inner circle cleaning tool. The inner circle cleaning tool has the beneficial effects that the inner cavity of the metal riser tube can be prevented from forming an annular alum