Tool mold for omni-directional wrapping of grain

The utility model relates to a tool mould for omnidirectional coating of grain, which comprises an upper plate, a positioning ring, a mould sleeve and a lower plate, the mould sleeve is fixed on the lower plate through a screw, a mould cavity is arranged at the center of the mould sleeve, an annular step is arranged at the upper end of the mould sleeve, the positioning ring is arranged in the annular step, the center line of the positioning ring coincides with the center line of the mould cavity, and the upper plate covers the mould sleeve. A circular truncated cone is arranged at the bottom of the upper plate. According to the utility model, a coating mode of glue pouring and reverse extrusion can be adopted, so that the coating material in the die sleeve flows in the reverse direction relative to the movement direction of the grain, the matching of the positioning ring and the die sleeve is facilitated, and the coaxiality of the grain and a coating layer in the coating process is ensured. 本实用新型涉及一种药柱全向包覆用工装