Bottle mouth closing-up device for seamless gas cylinder

The invention discloses a bottle opening closing-up device for a seamless gas bottle, and belongs to the technical field of seamless gas bottle machining equipment. Comprising a base, a clamping seat, a rotating plate, a pressing piece and a high-temperature flame nozzle, a side plate is arranged at one end of the top of the base, the clamping seat is rotationally connected to the side wall of the side plate, a first motor is arranged on the side wall of the side plate, the clamping seat is driven by the first motor, limiting plates are arranged at the top of the base, and a lead screw is rotationally connected between the two limiting plates and is parallel to the clamping seat; the second motor is arranged on the limiting plate, an output shaft of the second motor is connected with the lead screw, the lead screw is sleeved with the sliding plate, the bottom of the sliding plate is attached to the top of the base, the sliding plate and the lead screw are matched to form a linear moving structure, and the ver