Valve core mold clamping device

The utility model discloses a valve core mould clamping device, which comprises a lower mould and an upper mould installed on the lower mould, a fixed cylinder is installed behind the lower mould, a screw rod is rotatably connected in the fixed cylinder, a driving motor is installed at the top end of the fixed cylinder, the output end of the driving motor is connected to the top end of the screw rod, and the output end of the driving motor is connected to the top end of the screw rod. And the outer part of the screw rod is in threaded connection with a threaded sleeve. A rotatable lead screw is mounted in a fixed cylinder, and a driving motor at the top end of the fixed cylinder can drive the lead screw to rotate forwards and backwards, so that a threaded sleeve drives a connecting bracket to move up and down under the combined action of a thread and steering limiting of a guide rod in the rotating process of the lead screw; and the upper mold is clamped through the two sets of clamping blocks arranged at the