Bar type sand blasting device for inner circle and excircle of piston ring

The utility model relates to a bar type sand blasting device for an inner circle and an excircle of a piston ring. The bar type sand blasting device comprises a machine station, and is characterized in that a turnplate is arranged on the machine station, wherein, a rotatable pressure plate is arranged above the turnplate; a through-hole is formed in the middle of the rotatable pressure plate; sand blasting pipes are respectively on one lateral side of the rotatable pressure plate and in the through-hole; and blasting nozzles are arranged at the end parts of the sand blasting pipes. By adopting the bar type sand blasting device, sand can be blasted to the inner circle and the excircle of the piston ring at the same time, so that the aim of removing oxide scales is achieved; and not only can the production line and the processing cycle be shortened, but also the consistency of the product quality can be guaranteed, so that the expectations of customers is satisfied.