Safe and energy-saving preparation device for carbonic acid blank

The utility model relates to the technical field of bottle preform production, and discloses a safe and energy-saving carbonic acid preform preparation device which comprises a top mold and a bottom mold, an injection molding runner is formed in the inner wall of the top mold, one end of the injection molding runner is communicated with a fixed pipe, the surface of the fixed pipe is rotationally sleeved with a rotating cylinder, a connecting rod is hinged to the inner wall of the rotating cylinder, and the connecting rod is connected with the bottom mold. A clamping head is hinged to the other end of the connecting rod; according to the utility model, the rotating cylinder is screwed, the rotating cylinder rotates to enable the connecting rod to drive the clamping head to move, and the clamping head moves to enable the clamping head to be separated from the injection molding pipe, so that the purpose of convenient replacement can be achieved, the workload is reduced, and the replacement efficiency is improved