Introduction to the function of film slitting machine: precise slitting and efficient operation

Film slitting machine is a special equipment used to cut wide film materials into multiple narrow materials, which is widely used in packaging, printing, electronics, new energy (such as lithium battery separator) and other industries. Its core function is precise slitting and efficient operation, and the following is a detailed introduction to the function:

1. Precise slitting function

• High-precision slitting control

◦ Servo motor or high-precision magnetic particle clutch is used to control the tension to ensure the stability of the tension of the film during the slitting process and avoid the material from stretching and deformation or wrinkling.

◦ The slitting width accuracy can reach ±0.1mm (depending on the equipment level), and the edge is flat and burr-free, which meets the standards of high-demand industries (such as optical film and electronic film).

• Multiple slitting methods

◦ Round knife slitting: suitable for thicker materials (such as PET, PP film), smooth incision.

◦ Razor slitting: used for ultra-thin materials (such as lithium battery separators) to reduce stress damage.

◦ Extrusion slitting: suitable for elastic films, avoid delamination.

• Automatic web guiding system

◦ Real-time monitoring of the edge position of the film through photoelectric or ultrasonic sensors, and automatic adjustment of the transverse position of the coil to ensure the straightness of the slitting.

2. Efficient operation function

• High-speed slitting capability

◦ Modern slitter speed can reach 100-800 m/min (depending on material characteristics), with automatic roll changing device to achieve continuous production.

• Automated operations

◦ Automatic loading/unloading: reduce manual intervention and improve efficiency.

◦ Intelligent control system: PLC or industrial computer integrates human-machine interface (HMI), presets slitting parameters (width, tension, speed), and one-key start.

◦ On-line quality inspection: Some equipment is equipped with CCD camera or defect detection system to reject defective products in real time.

• Energy-efficient design

◦ Adopt variable frequency drive, low energy consumption pneumatic components to reduce operating costs.

3. Core components and technologies

• Unwinding unit: constant tension control, support large roll diameter (such as Φ600mm or more).

• Slitting unit: the cutter shaft is made of high hardness (such as tungsten steel), which has a long life and can be quickly replaced.

• Winding unit: surface take-up or center take-up, equipped with pressure rollers for anti-wrinkle.

• Dust and static removal: Integrate ionizing fan or dust removal device to avoid film pollution.

4. Applicable Materials

• Plastic films (BOPP, PET, CPP, PE, etc.), aluminum foils, composite films, release papers, lithium battery separators, optical films, etc.

5. Industry applications

• Packaging industry: slitting of cling film, label materials.

• New energy: lithium battery separator, solar backsheet film slitting.

• Electronics: Slitting of flexible circuit board (FPC) substrates.

Summary of benefits

• High precision: ensure the quality of slitting and reduce material waste.

• High efficiency: Automated design greatly increases production capacity.

• Flexibility: Adaptable to different materials, widths and process needs.

Through the combination of precise slitting and efficient operation, the film slitting machine has become a key equipment in the film processing industry chain, which directly affects the performance and cost of the final product.