Locking device for core-pulling mechanism of injection mold

The utility model discloses a locking device for a core-pulling mechanism of an injection mold, which comprises a lower mold plate and an upper mold plate capable of moving up and down relative to the lower mold plate to open or close the mold, the lower mold plate and the upper mold plate are closed to form a cavity, a core-pulling swing arm is arranged on the lower mold plate in a relatively rotating manner, and the core-pulling swing arm is connected with the lower mold plate. The core-pulling swing arm is provided with a mold core which can rotate along with the core-pulling swing arm to be inserted into the mold cavity, the lower mold plate is hinged with a locking block, and one end of the locking block can lock the core-pulling swing arm after the mold core is inserted into the mold cavity; the upper mold plate is provided with a push rod which can push the locking block to rotate to lock the core-pulling swing arm when the upper mold plate and the lower mold plate are closed, the push rod leaves the l