Yarn tension control for consistent production results

August 2019 — Speed is usually a key factor of performance. With a line speed of up to 200m/min, the loose tubes are stranded at 2,500min-1. But speed alone does not fulfill all the requirements a manufacturer has for a production line. Integrated components also have to react precisely at high velocity.

New materials and optimisations of cable designs in terms of compactness, number of fibers, material consumption and production costs constantly pose new challenges for cable manufacturers. A few years ago, a loose tube with 12 fibres had a diameter of 2.8mm. Today, the same loose tube has a diameter of only 1.4mm. Low binding forces are a quality criterion when stranding such cores and additionally supporting the product characteristics. The newly developed yarn tension binder from Rosendahl with integrated yarn tension measurement enables minimum yarn tensions of 2N, which cannot be achieved using conventional binders. These constant tension forces contribute to optimum results in fiber optic productions and minimise scrap.

The benefits are
– Meeting the requirements of new cable designs and materials (micro-tubes, soft-bundles)
– The integrated torsion lock is located directly at the binding point, which allows for short reversal lengths
– Large yarn bobbin sizes make possible long production lengths and reduce setup times
– Suitable for dual-end yarn, offers even higher production speeds
– Easy to integrate as an upgrade for existing lines

Rosendahl Nextrom GmbH
wire Southeast Asia 2019, booth H 01
Tel.: +43 3113 5100-0

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Partner Links
  • IWMA – International Wire & Machinery Association
  • ESF – European Spring Federation
  • ICFG – International Cold Forging Group