Paper burrs and rough edges are common problems in copy paper manufacturing. Poor cutting quality affects packaging appearance, printing performance, and customer satisfaction.
Understanding the root causes can help factories reduce waste and improve product quality.
Main Causes of Burr Problems
1. Worn Knife Blades
Blunt blades cannot produce clean cuts.
Solution:
- Regular blade inspection
- Timely blade sharpening
- Replace damaged knives immediately
2. Incorrect Knife Clearance
Improper clearance between upper and lower knives can cause tearing instead of cutting.
Solution:
- Adjust knife gap precisely
- Maintain proper alignment
3. Poor Web Tension
Unstable tension causes paper movement during cutting.
Solution:
- Calibrate tension systems regularly
- Inspect tension rollers
4. Encoder Problems
Encoder errors can create unstable cutting lengths.
Solution:
- Check encoder signals
- Inspect electrical connections
5. Feeding Belt Slippage
Slipping belts affect synchronization.
Solution:
- Replace worn belts
- Adjust belt pressure
Importance of Knife Shaft Synchronization
In double rotary cutting systems, synchronization is extremely important.
Gapless gears and servo synchronization ensure:
- Smooth cutting
- Stable operation
- Reduced vibration
- Better edge quality
Preventive Maintenance Tips
Factories should establish routine maintenance plans including:
- Lubrication checks
- Knife inspection
- Gear inspection
- PLC monitoring
- Tension calibration
Paper burrs and rough edges are usually caused by mechanical wear, improper adjustment, or unstable synchronization. Through regular maintenance and accurate machine setup, manufacturers can significantly improve cutting quality and production efficiency.