Created on 2025.12.01

Safety Precautions in Rewinding and Slitting Operations

In rewinding and slitting production, machines run at high speed, materials shift tension rapidly, and cutting blades are extremely sharp. Safety must always come first. Below are essential safety recommendations for operators and plant managers to ensure stable and accident-free production.

1. Pre-Start Inspection

Ensure air shafts, mechanical shafts, and differential slip shafts are locked and secure
Verify magnetic powder brakes, hysteresis brakes, and tension controllers are functioning properly
Inspect blade sharpness and correct installation (HSS or Tungsten Carbide)
Ensure safety guards and photoelectric sensors are intact
Confirm pneumatic shearing knife sets or auto-blade systems are firmly positioned

2. Operation Safety

Keep hands away from running material and blade edges
Never step over running unwind/rewind shafts
Avoid loose clothing that may get caught in rollers
Never adjust the blade seat or replace blades while the machine is running
Monitor winding profile and edge alignment to avoid material breakage
When using pneumatic or automatic blade systems, confirm “safety mode” is activated

3. Emergency Handling in Case of Web Break

Do not grab broken materials by hand
Press the emergency stop immediately
Troubleshoot tension, edge alignment, and blade position only after the machine stops
Avoid touching overheated components such as brakes

4. Blade Maintenance Safety

Turn off and lock the machine before blade replacement
Use protective gloves
Keep HSS blades stable during onsite sharpening
Handle Tungsten Carbide blades carefully—they are extremely hard but brittle

5. Daily Equipment Maintenance

Check overheating signs on magnetic powder or hysteresis brakes
Inspect air shaft rubber strips and keys for wear or air leakage
Verify slip rings on the differential shaft move smoothly
Clean guide rollers and bowed rollers
Ensure pneumatic knife air pressure is stable

6. Operator Training & SOP

Operators must receive training on blade handling, tension control, and machine functions
Establish SOPs for material change, blade change, and emergency stop
Maintain a daily safety checklist

Conclusion

Rewinding and slitting operations are precise and fast-moving. Many accidents come from small habits. With proper shafts, cutting tools, tension control systems, and a disciplined operating process, your production line can stay safe and efficient.

For professional recommendations on Differential Slip Shafts, Air Shafts, Pneumatic Shearing Knife Sets, Hysteresis Brakes & Clutches, Tungsten Carbide Knives, feel free to contact us anytime.