Internal thread core-pulling structure

The utility model discloses an internal thread core-pulling structure, which can reduce processing procedures, does not need secondary processing, improves the forming effect of an internal thread structure so as to ensure the quality of a product, improve the yield of the product and reduce the production cost, comprises a sliding block, an oil pressure motor and a shovel base, and is characterized by further comprising an internal thread mold core, the internal thread mold core is rotationally installed on the sliding block, one end of the internal thread mold core penetrates through the sliding block, the end portion of the internal thread mold core is an internal thread core mold, the other end of the internal thread mold core is connected with the oil pressure motor through the transmission component, a spring limiting groove for containing a spring is formed in the sliding block, and the spring is installed in the middle of the internal thread mold core in a sleeved mode; during mold opening, the spring