The storage of water channel and the stopping the water ridge formation device null for the sand mold for casting and the sand mold for casting

摘要

PURPOSE:To prevent flowing into a sprue, which is not yet poured, with molten metal and the deterioration of casting quality by shutting off between both adjoining sprues of sand mold for casting opening plural sprues on upper faces and arranging a pouring basin groove for flowing the molten metal spilled from the sprue during pouring the molten metal. CONSTITUTION:At the time of forming the pouring basin groove 8, etc., by working a working cylinder 16 for lifting, a sand cutter 32 is descended and cutters 351, 352 are bit into upper face 1a of the sand mold 1. Successively, the sand cutter 32 is shifted with a rodless cylinder 23 to form a slender groove 39. Further, the pouring basin groove 8 is formed with the cutter 352 and the molding sand loosely developed according to this formation is piled on the one end side of pouring basin groove 8. Successively, at the time of turning the rodless cylinder 23 at 18 deg. angle with a rotary actuator 29, a formed mold 33 is set above the piled molding sand. Further, by working the working cylinder 16 for lifting, the formed mold 33 is descended to form molten metal flow stopping rib 9.