Sand core structure for improving production efficiency of automobile brake cylinder

The utility model discloses a sand core structure for improving the production efficiency of an automobile brake cylinder, which comprises a pouring mechanism, a sand core and part cavities, every two part cavities form a group, the two part cavities in each group are symmetrically distributed up and down, and the sand core is arranged between the part cavities; the plurality of groups of part cavities are uniformly distributed in the sand box in parallel; all the part cavities are communicated through a pouring mechanism; the sand core comprises a core seat, a connecting shaft and a core head, and the core seat, the connecting shaft and the core head are fixed into a whole; the core seat is square, the connecting shafts are cylinders, the core heads are circular truncated cones, the connecting shafts are arranged at the upper end and the lower end of the core seat, and the core heads are arranged at the other ends of the connecting shafts. On the basis of a conventional brake cylinder sand core, two sand cor