Learn about the functions of the film slitting machine for efficient film slitting operations

Film slitting machine is a key equipment in film processing, mainly used to cut wide film coils into narrow rolls of specific width, which is widely used in packaging, electronics, photovoltaic, medical and other industries. The following is a detailed analysis of the functions and efficient operation of the film slitting machine:

First, the core function of the film slitting machine

1. Precise slitting

◦ By means of round, razor or air knife technology, the parent roll is divided into multiple rolls of narrow material, with a width accuracy of ±0.1mm.

◦ Support straight line slitting, staggered slitting (such as tape slitting) and other modes.

2. Tension control

◦ Magnetic particle clutch, servo motor, etc. are used to achieve constant tension control to avoid film stretching deformation or wrinkling.

◦ Segmented tension adjustment (unwinding, slitting, winding) to adapt to different materials (such as PE, PET, BOPP).

3. Automatic Deviation Correction (EPC System)

◦ The photoelectric or ultrasonic sensor monitors the position of the edge of the film in real time, and automatically adjusts the lateral offset of the coil to ensure the straightness of the slitting.

4. Surface quality control

◦ Equipped with in-line defect detection (e.g., camera or infrared sensor) to mark defects.

◦ Static eliminator reduces dust adsorption during slitting.

5. Efficient winding

◦ Center winding or surface winding mode, support automatic roll change, taper tension control (to prevent overwinding).

◦ Some models have a shaftless winding function to improve the efficiency of roll changing.

Second, the key measures to achieve efficient slitting operations

1. Equipment selection and configuration

▪ Slitting method is selected according to material properties (thickness, ductility):

▪ Rigid film (e.g. PET): Round knife slitting to reduce burrs.

▪ Flexible film (e.g. PE): Air knife slitting to avoid sticking.

▪ High configuration options: automatic loading and unloading system, intelligent knife arrangement software.

2. Optimization of process parameters

▪ Speed matching: The slitting speed needs to be balanced with the film tension and thickness (usually 30-800m/min).

◦ Tool angle adjustment: The inclination angle of the blade affects the quality of the incision, and regular grinding and maintenance are required.

◦ Environmental control: stable temperature and humidity (such as 25±5°C, RH60% or less) to prevent film deformation.

3. Automation and intelligence

◦ Intelligent control system: PLC + human-machine interface (HMI), preset slitting scheme, one-key switching specifications.

◦ Internet of Things (IoT): Remote monitoring of equipment status, predictive maintenance (e.g. tool life warning).

4. Key points of operation and maintenance

◦ Check before starting: Confirm the sharpness of the tool, air pressure/hydraulic system pressure.

◦ Process monitoring: observe the flatness of the winding and adjust the tension in time.

◦ Regular maintenance: clean the guide rollers, lubricate the moving parts, and calibrate the sensor.

Third, common problems and solutions

• Flash: Replace the passivation tool and adjust the amount of slitting overlap.

• Uneven winding: Check the sensitivity of the EPC system and adjust the core concentricity.

• Electrostatic sparks: increase ionizing fans to control ambient humidity.

Fourth, industry application cases

• Lithium battery separator: ultra-narrow slitting (1-2mm), dust-free environment is required, and laser slitting technology is adopted.

• Food packaging film: high-speed slitting (more than 500m/min) + online quality inspection.

Through reasonable selection, parameter optimization and intelligent upgrading, the film slitting machine can significantly improve efficiency (20%-50% increase in production capacity) and reduce the scrap rate (<0.5%). Further information on requirements can be provided for specific machine or process details.