Core ejection device for fine and small sand core

The utility model discloses a core ejection device for a fine and small sand core. The core ejection device comprises at least one lower core ejection rod and at least one lower core ejection plate, wherein the upper part of at least one lower core ejection rod can extend into a lower core box; a boss is arranged at the top end of the lower core ejection rod; the bottom surface of the boss is flush with the bottom surface of a mold cavity of the lower core box; at least one lower core ejection plate is fixedly connected with the at least one core ejection rod through a connecting piece. According to the core ejection device for the fine and small sand core, the boss on the lower core ejection rod extends into the fine and small sand core so as to eliminate the adverse effects of fine and small sand core scrap and the like as the fine and small sand core loses balance easily because the proportion of the transverse size to the longitudinal size of the fine and small sand core is large when the fine and small core is ejected; and therefore, the fine and small sand core is ejected smoothly and the core manufacturing can be realized; the core ejection device for the fine and small sand core has the advantages of being simple in structure, flexible to assemble and disassemble, high in core ejection efficiency, high in sand core quality, remarkable in economic benefits, and the like.