The core of Slitting machine - differential slip shaft

   Slitting machine is a kind of mechanical equipment for wide-width paper, mica tape plastic film, adhesive tape, copper foil aluminum foil, and slit into a plurality of narrow-width materials. It is commonly used in papermaking machinery, wire and cable mica tape and printing and packaging machinery. The main application of slitting machine is: non-woven fabric, mica tape, paper, insulating material and various film materials. It is especially suitable for narrow tape (non-woven fabric, paper, insulating material, mica tape, film, etc.) cut.

    It is a device that cuts the whole web into multiple rolls, which requires the internal reel tension to be precisely controlled in sections, in order to ensure the product's elongation and end face uniformity. However, due to the thickness error of the material itself, in the strip winding process, the diameter of each coil material has a large accumulation error, resulting in a large gap between the speed and tension, the tightness of the material roll, the uneven end surface, and the partial tension of the coil. Excessively stretched and deformed.

Therefore, this requires a reel that can overcome these problems, and the slip shaft can just overcome these phenomena. The slip ring can slip with a certain slip torque, and the slip amount can compensate for the speed difference. Can accurately control the tension of each roll of material. Depending on the material, strip width, thickness, and tension, choosing the appropriate slip axis will achieve the desired result.

So what is the differential slip shaft?

 

   The slip shaft, also known as the differential shaft and the friction shaft, is used as a reel and a special reel for the slitter. The slip shaft consists of a shaft core and a plurality of sets of slip rings, each slip ring is independently slipped, and the torque is controlled by the central air pressure or the pressure transmitted from the side. Thereby, it is ensured that the coils are uniformly and neatly and continuously tensioned from the inside to the outside.

 

    Why does the slitting machine use the slip shaft as the take-up reel?

    First, with the improvement of people's living standards and the development of science and technology, there is an increasing demand for flexible packaging products. The elongation requirements of the film are getting smaller and smaller, and the uniformity of the winding surface is getting higher and higher. Extremely high demands are placed on the tension control of the material film. The tension control accuracy of the take-up reel directly determines the elongation of the slitted product and the uniformity of the end face, so it is necessary to use the slip shaft as the take-up reel;

    Secondly, after using the slip shaft, the automation degree, humanized operation, speed and winding accuracy of the slitting machine can be improved;

    Third, the use of the slip shaft to take up valuable materials (metal foil, battery separator, special paper, etc.) can greatly improve the quality rate and reduce the cost; using the slip shaft, the difficulty of slitting and winding is reduced.

The slip shaft has many advantages for the slitting machine, but the slip shaft also has different structure types, so it is also a hard work to choose the appropriate slip shaft. At present, there are mainly three types of structures on the market: double gas slip. Differential shaft, central air pressure slip shaft, side pressure slip shaft.

 

1.Double gas path slip shaft: lock air pressure and adjust air pressure separation, realize continuous control from extremely low tension to wide tension range, coil winding tension is constant, end face is super smooth, operation performance is excellent, automatic loading and unloading The whole volume is based on a pneumatic button. In the middle of the process, the material is replaced with material and there is no displacement. It is an innovative upgraded version of the traditional central air pressure differential shaft. The new type of double gas path slip shaft with superior performance, JCTPRINT Latest dedication! Lock the paper tube / plastic tube / aluminum tube / steel tube.

Representative products: Nishimura-style, Kataoka-type two dual-airway slip shaft

Among them, Xicun has the best performance, and its range of tension and controllability are pleasant, comfortable and free to do whatever you want. All kinds of delicate coils can be easily handled! Lithium battery separator / pole piece, power battery pole piece, ultra-low tension PET film, electronic film, copper foil / aluminum foil and other metal foil cutting and winding, is gradually exploring the use of dual gas path slip shaft.

Kataoka is popular with users for its convenience, practicality, stability, toughness, and ease of operation. It is currently used for high-speed coiling of composite film and cigarette film! Expandable applications are more extensive.

 

2.Center air pressure slip shaft: input the corresponding air pressure to the shaft core air chamber (bag), and the compressed air pressure friction member - apply pressure to the slip ring - to generate the corresponding friction torque. The air pressure is output from the electro-pneumatic proportional valve and is controlled by the PLC tension system. The system parameters are set according to different materials, thicknesses and coil diameters, and always maintain constant tension. The low tension to the large tension range is continuously controllable.

 

   The central air pressure sliding shaft is divided into two types: pneumatic locking type and mechanical locking type.

   1) Pneumatic locking type central air pressure differential shaft, the air pressure simultaneously locks the core and generates friction torque, which can realize automatic unloading, positive and negative reeling, winding without breaking in the middle of winding, no offset, High control precision and constant tension winding. The working pressure requirement is guaranteed to be more than 1KG, in order to grasp the die, and not to rotate or shift, the disadvantage is that it can not be used in lower tension situations. Lock the paper tube / plastic tube / aluminum tube / steel tube.

   Representative products: XC West Village slip axis, DS Japan East Extension slip axis

   In the past ten years, the XC Xicun slip shaft has been successfully applied to the slitting and winding of metal foils such as lithium battery separators/polar sheets, power battery pole pieces, ultra-low tension PET films, electronic films, and copper foil/aluminum foils.

  XC special form ultra-low tension slip shaft, which can achieve extremely low friction tension, applied to slitting and winding of the thinnest (10μ) PET film/electronic film; ultra-narrow slip ring width 20mm, applied to the narrowest film ( 10mm) slitting and winding.

  2) The mechanical locking type center air pressure sliding shaft, the mechanical eccentric mechanism locks the winding core, and the friction torque is generated by the air pressure. The working pressure is low, starting from extremely low tension to extremely large tension, and the control precision is high. The GZ ball type sliding shaft is also convenient for automatic loading and unloading.

   Representative products: GZ ball/roller type slip shaft, JS key type slip shaft, PG sheet slip shaft, BRT notch iron slip shaft, CP blade type slip shaft

 

   3. Side pressure slip shaft: mechanical side pressure slip shaft, pneumatic side pressure slip shaft

   The axial transmission pressure compresses the respective slip rings in the axial direction. During the rotation of the mandrel, the friction ring end faces generate frictional force, and the friction torque is generated when the sliding deflection occurs, and the magnitude changes with the axial pressure. The disadvantage is that there is a pressure diminishing phenomenon between the ring and the ring, and the advantage is that a large torque can be generated to achieve a large torque and a large friction tension winding.

   1) The mechanical side pressure difference sliding shaft, the ends of both ends are pressed by springs, suitable for low speed machine (200m/min), the tension can not be adjusted in real time.

   2) Pneumatic side pressure slip shaft, the drive end is pressed by the plane cylinder, and the air pressure is adjusted in real time, which can realize constant tension or taper tension control.

 

The above is the display and introduction of the slip shaft type. The winding quality is the most important index of the slitting machine. Choosing a suitable slip shaft is the key to ensure the quality of the slitting machine. So choosing a professional processing and custom factory is also very important!

 

Jinan Jinchangtai Industry and Trade Co., Ltd. specializing in the production of industrial shaft products, is your best choice!