Choosing the right film slitting machine requires a comprehensive consideration of the following 5 key parameters to ensure that the equipment matches the production needs, material characteristics and process requirements:
1. Slitting width range
• Core requirements: Determine the maximum and minimum slitting width of the slitter according to the product specifications.
• Notes:
◦ The equipment needs to support stepless adjustment or fixed tool position to adapt to different widths of film (such as BOPP, PET, PE, etc.).
◦ High-precision slitting (within ±0.1mm) requires servo drive or digital control system.
• Example: If you need to cut a film of 0.5m~2m, the selection range needs to be slightly larger than this (e.g. 0.3m~2.2m) to leave a margin.
2. Slitting speed and production efficiency
• Key indicators: Slitting speed (usually 50~1000 m/min) directly affects the output.
• Matching Factors:
◦ Film material (e.g., CPP low-speed slitting and anti-stretch, metallized film needs to be high-speed).
◦ Number of winding stations (double stations reduce downtime and increase efficiency).
• Recommendation: Choose a model that is 20% faster than your current needs and have room for future upgrades.
3. Tension control accuracy
• Importance: Affects the flatness, end-face uniformity and material properties of the coil after slitting.
• Technical solutions:
◦ Magnetic particle brake (economical, suitable for low speeds).
◦ Servo tension control system (± 0.5% accuracy, suitable for high-tensile films such as lithium battery separators).
• Test points: Observe for serpentine rolls, edge breaks, or slack during slitting.
4. Rewinding and unwinding diameter and bearing capacity
• Parameter matching:
◦ Unwinding diameter (usually 600~1500mm), need to match the size of the raw material roll.
◦ Rewinding diameter (limited by equipment structure, such as inflatable bearing load 3~5T).
• Scalability: Automatic roll changing, online monitoring system can reduce manual intervention.
5. Slitting method and tool configuration
• Selection Basis:
◦ Blade slitting: suitable for rigid film (such as PET), pay attention to the tool material (tungsten steel/ceramic) and life.
◦ Shearing and slitting: used for elastic films (such as PE) to reduce burrs.
◦ Laser slitting: High precision is required (e.g., optical film), but the cost is higher.
• Additional features: dust removal device, online defect detection can improve the yield rate.
Other factors to consider:
• Degree of automation: automatic edge alignment, waste side suction and other functions can reduce labor costs.
• Brand and after-sales: Priority is given to manufacturers with mature cases.
• Energy consumption vs. maintenance: Compare long-term costs such as equipment power, lubrication system design, etc.
Summary: Balance the above parameters according to the type of film (e.g., thickness, ductility), production scale (batch/small batch) and accuracy requirements, and verify the actual effect through equipment testing. It is recommended to list the priorities (such as speed> accuracy, > cost) and then filter the models by type.