How to choose the right capacitor film slitting machine? Selection guides for different industries

Choosing the right capacitor film slitting machine needs to consider the material characteristics, production requirements, equipment performance and special requirements of the industry. The following are the selection guidelines and key factors for different industries:

1. Core selection factors (general principles)

1. Thin film material properties

◦ Material: polypropylene (PP), polyester (PET), polyphenylene sulfide (PPS), etc., different materials have different requirements for the tension control of the slitting machine and the wear resistance of the tool.

◦ Thickness: Ultra-thin films (e.g., 2 μm) require high-precision slitting, and thick films (e.g., 20 μm or more) require a more powerful winding system.

◦ Coating/metallization: Metallized films are prone to burrs and require anti-static design and special tools.

2. Slitting accuracy

◦ General requirements: ± 0.1mm (ordinary capacitance), high frequency/high voltage capacitance should be ± 0.02mm.

◦ High-precision slitting needs to be equipped with laser width meter or CCD online detection system.

3. Device configuration

◦ Tension control: closed-loop servo tension system (suitable for high tension consistency requirements).

◦ Tool type: round knife (high-speed slitting), razor (film), ultrasonic knife (anti-delamination).

◦ Winding method: center winding (general), surface winding (anti-deformation).

4. Production efficiency

◦ Speed range: 50-300m/min for ordinary slitting machine, more than 800m/min for high-speed machine.

◦ Degree of automation: automatic tool change, online defect detection, intelligent scheduling system.

2. Industry-specific selection guide

1. Consumer electronics (aluminum electrolytic capacitors, film capacitors)

• Demand characteristics: large volume, medium precision, cost sensitive.

• Selection Suggestions:

◦ Medium speed slitting machine (200-400m/min), tension control ±5%.

◦ Standard round knife slitting with static elimination device.

◦ Applicable models: semi-automatic slitting machine (such as Japanese Iwata, domestic Hongwen Technology mid-range model).

2. New energy (photovoltaic, electric vehicle capacitor)

• Demand characteristics: high-pressure, high-frequency, high-temperature resistant film (such as PPS), high-precision slitting.

• Selection Suggestions:

◦ High-precision slitting machine (±0.02mm), equipped with constant tension system and temperature compensation.

◦ Metallized film needs to be rewound with anti-oxidation (nitrogen protection optional).

◦ Recommended equipment: German Atlas high-speed slitting machine, Swiss Metatt ultrasonic knife model.

3. Power Electronics (Industrial Capacitors, Power Film Capacitors)

• Demand characteristics: ultra-thick film (15-30μm), high tensile stability.

• Selection Suggestions:

◦ Heavy-duty slitting machine with tension control ±1% with pre-stretching device.

◦ Tools need to be wear-resistant (diamond-coated knives).

◦ Applicable equipment: Italy Compnoni heavy-duty slitting line.

4. Medical/Aerospace (High Reliability Capacitors)

• Demand characteristics: ultra-thin film (≤2μm), pollution-free slitting environment.

• Selection Suggestions:

◦ Clean-free workshop design, equipped with ionized air cleaning system.

◦ Ultrasonic slitting avoids material delamination, and tension fluctuations ≤ 0.5%.

◦ Recommended: Japan Hitachi high-tech ultra-precision slitting machine.

3. Other precautions

1. Energy consumption and maintenance

◦ Choose a variable frequency drive system to reduce energy consumption, and the modular design is easy to maintain.

2. Scalability

◦ Reserved interfaces (such as MES system docking) to adapt to the needs of smart factories.

3. Vendor Support

◦ Preference is given to suppliers who provide process commissioning services, especially for special material slitting.

The return on investment of the slitter can be maximized by selecting equipment that matches accuracy, speed and function based on industry characteristics and production needs, while evaluating long-term costs (e.g., consumables life, energy consumption). It is recommended to test the slitting samples in the field to verify the actual performance of the equipment.