CRCA slit coil packing line Showcase

Precision Protection: Automated Wrapping for Ultra-Narrow CRCA Coils

Introduction & Background

As global demand for high-precision Cold-Rolled Close Annealed (CRCA) steel surges, manufacturers face pressure to eliminate transit damage in automotive trim and electronics. Narrow slit coils (20-600mm) present the highest difficulty, where traditional packaging fails to meet stability and surface integrity standards. POSCO Wuhan’s decade of experience highlights the necessary shift toward intelligent, fully automated solutions.

Technical Solution: Intelligent Horizontal Wrapping

Modern horizontal stretch wrapping systems transform narrow-coil protection through the following engineering innovations:

Step-by-Step Wrapping Process

• Coil Loading: Operator places coil on the expandable mandrel; laser scanner measures exact width and diameter.
• Pre-Wrap Phase: Foam guards attach to edges; VCI paper dispenses with software-controlled overlap.
• Stretch Wrapping: Rotary arm orbits the coil with pre-stretched film (250% elongation). Anti-wobble algorithms adjust rotation speed dynamically.
• Sealing & Discharge: Heat-seal unit bonds film tails; the mandrel retracts for safe, gravity-free unloading.

Solution Comparison Summary

Future Outlook

The evolution to intelligent wrapping is the new baseline for CRCA packaging. With Industry 4.0, next-gen systems will feature AI-driven tension calibration and blockchain-tracked environmental conditions during transit, ensuring brand reputation remains as polished as the steel itself.