Sand mold for piston ring

The utility model relates to a sand mold for a piston ring, and belongs to the manufacturing field of piston rings. The sand mold comprises a plurality of sand boxes which are sequentially stacked from bottom to top, a cone-shaped through hole which is used as a pouring cup is formed in a geometrical center position of the sand box at the top, and the bigger opening of the cone-shaped through hole is formed upwards. For the sand mold provided by the utility model, the pouring cup is formed by digging on the sand box at the top by a person using a template frame, so that production requirements are satisfied, operation is simple, the occupation of special places for manufacture is not needed, and the manufacture of pouring cup casting iron pieces which are liable to wear and tear is not needed; paint coating is not needed, and collection and cleaning to be completed by a specially-assigned person are not needed, so that occupied manpower is greatly reduced; the rate of qualified workblanks is not influenced.