Tool closing system for plastic blow molding machines

A tool closing system for plastic blow molding machines comprising a drive base plate, a front mold clamping plate and a rear mold clamping plate positioned between the front mold clamping plate and the drive base plate, wherein the drive base plate, the front mold clamping plate, and the rear mold clamping plate, comprise guide elements which are shiftably arranged on guides which are mounted on a carriage, a drive device which is fastened to the drive base plate and comprises an extensible and retractable drive rod which is articulated to the rear mold clamping plate for force transmission without any bending moment, and two substantially C-shaped or approximately U-shaped frame elements which are arranged at a distance side by side in parallel with the guides and have each a substantially horizontally extending central web and two substantially vertically extending webs, wherein a respective one of the two substantially vertical webs is articulated to the drive base plate and the other substantially vertical web is articulated to the front mold clamping plate, wherein the substantially C-shaped or approximately U-shaped frame elements are shiftable with the drive base plate and the front mold clamping plate along the guides relative to the carriage.