Tool closing system for plastic blow molding machine

The invention discloses a tool closing system for a plastic blow molding machine. The system is characterized by comprising a driving base plate, a front mold clamping plate, a rear mold clamping plate, a driving device and two roughly C-shaped and approximately U-shaped framework elements, wherein the rear mold clamping plate is arranged between the front mold clamping plate and the driving base plate, the driving base plate, the front mold clamping plate and the rear mold clamping plate comprise guide elements which are movably arranged on a guide piece, the guide piece is mounted on a bracket, the driving device is fixed on the driving base plate and comprises an extendable and retractable driving bar, the driving bar is hinged to the rear mold clamping plate for transmitting force without any bending moment, the framework elements and the guide piece are arranged in parallel and side by side at a certain interval, each framework element comprises a central platy piece extending roughly horizontally and tw