Success Story 1

Advantages of Bag Expansion Machines in Cold-Shrink Technology

        Bag expansion machines replace traditional steel wire expansion methods with flexible fabric bags and pull-rope structures. This avoids direct contact between cold-shrink tubes and rigid materials (e.g., steel wires or support pipes), minimizing surface scratches or damage and significantly improving product qualification rates

       Automated pneumatic cylinders (e.g., expansion cylinders and pull-rope cylinders) enable simultaneous advancement of expansion tubes and retraction of fabric bags. A single operation completes both cold-shrink tube expansion and support tube insertion, boosting efficiency by over 30% compared to traditional methods

     By leveraging flexible materials, automated design, and structural optimization, bag expansion machines address inefficiencies and high defect rates in traditional cold-shrink expansion processes, making them essential equipment for manufacturing cold-shrink tubes in power and communication industries14.