The advantage of using differential slip shaft in slitting machine

Differential Slip shaft, also known as friction shaft. It is applied to the rewinding shaft of the slitting machine, and it is also used for the unwinding shaft in special occasions. The purpose is to use the principle of slipping of each slip ring on the slip shaft to keep multiple rolls on the shaft with constant tension for rewinding and unwinding.

The slitting machine is a device that cuts a roll of web material into multiple rolls, and is widely used. The function of the rewinding shaft is to wind the multi-reel material after slitting various materials on one or two shafts evenly, neatly and with constant tension from the core to the outer layer. However, due to the uneven thickness of the material itself, there is a certain thickness error. After the coil material is continuously coiled, the diameter of each coil material will produce a greater cumulative error. This leads to a larger difference in coiling speed and a larger difference in tension between each strip. This results in uneven tightness of the roll material and uneven end surfaces. In severe cases, the material is damaged and scrapped due to excessive tension, especially the polyester film, which not only has a large thickness error, but also has a large elongation rate, which is easily stretched and deformed to cause waste.

The slip shaft has a special structure and is composed of multiple slip rings, which can overcome the above phenomena. When working, the slip ring is controlled to slip with a certain slip torque value (torque), and the slip amount just compensates for the speed difference, so that the tension of each roll of material can be precisely controlled, and constant tension can be crimped to ensure the crimp quality.

The use of the slip shaft can improve the speed of the slitting machine, the winding accuracy, the degree of automation, the reduction of the preparation time, and the humanization of the operation. In particular, a variety of cast polyester film materials with poor stretch resistance and large thickness errors use a slip shaft to reduce the difficulty of winding. The precious material metal foil is wound with a differential shaft, which greatly improves the rate of genuine products and reduces production costs. Special paper is the earliest application of this technology.