EuroWire March 2019

Technology News

▲ ▲ Consistent production results from the ROBI high-speed low-tension cross-binder

Integrated yarn tension control for consistent production results

Benefits include: •

New materials and optimisation of cable designs in terms of compactness, number of fibres, 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. The newly developed yarn tension binder from Rosendahl with integrated yarn tension measurement enables minimum yarn tensions of two newtons, which cannot be achieved using conventional binders. These constant tension forces contribute to optimum results in fibre optic production and minimise scrap.

ROSENDAHL’S high-speed low-tension cross-binder was developed for binding SZ stranded loose tubes. Ever-smaller cable designs and softer materials require the ongoing development of this stranding method. The new integrated yarn tension measurement of the ROBI allows consistent and, if required, very low binding tension, during high-speed production. Speed is usually a key factor of performance. With a line speed of up to 200m/min, the loose tubes are stranded at 2,500 rpm. Speed alone does not fulfil all the requirements a manufacturer has for a production line. Integrated components also have to react precisely at high speeds. ROBI

The cross-binder with integrated yarn tension control meets 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 extremely short reversal lengths • Large yarn bobbin sizes allow for long production lengths and reduce setup time • Suitable for dual-end yarn, offering even higher production speeds • Easy to integrate as an upgrade for existing lines RosendahlNextrom – Austria Website : www.rosendahlnextrom.com

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March 2019

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