The use of slip shaft can improve the speed, winding accuracy, automation, reduction of preparation time and humanization of operation of the slitter. Especially, many kinds of tape casting polyester thin materials with poor tensile resistance and large thickness error use slip axis to reduce the difficulty of winding. The use of slip shaft for rolling precious metal foil can greatly improve the rate of genuine products and reduce production costs.
The slip shaft takes the precise air core ventilation spindle as its core, and uses compressed air to drive the piston in the cavity, which generates friction torque between the friction parts and the slip ring. It further drives the diagonal expansion sheet on the diagonal base to expand outward, extrudes the winding drum and transfers the torque of the winding drum, so as to achieve constant tension winding.
The slip shaft has a special structure and consists of several slip rings. When working, the slip ring is controlled to slip with a certain slip moment value (torque). The slip amount just compensates for the velocity difference, so that the tension of each roll of material can be accurately controlled, and constant tension coiling can be achieved to ensure the quality of coiling. It can be used in the range from very low to high tension. It is suitable for the requirements of high speed, large material thickness error, multi-stage tension control, high tension control precision and neat end winding. Therefore, the air expansion unit of the slip shaft is composed of a cavity, an inclined base, a piston, an air seal, a bearing, a spring and an expansion plate, which play an important role. The coordination between each part is also relatively important.