How to choose the right film slitting machine? There are 5 key parameters that should not be overlooked

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.