Classification of Clamping Equipment for Vacuum Blister Machines

The frame type clamping device consists of upper and lower frames. The sheet is sandwiched between the two frames. When the frame is open, the lower frame generally remains fixed. The lower part of the upper frame of various types of single-station forming machines is directly fixed on the forming chamber. Both manual and semi-automatic forming machines for hand loading of parisons and finished product removal are equipped with safety operating devices within the opening range of the frame when the frame size is large. For the parison with large sliding property, it is required that the clamping force can be adjusted in a relatively wide range. To this end, two rubber-coated rollers are used, which are pressed against each other by springs, and equipped with a pressure adjusting device. The clamping of the continuous pull-tab forming machine is the joint action of the zipper on both sides and the front and rear gates.