EoW May 2012

News Technology

Stranding in high-tech mode

ancillary equipment like tangential pay-offs, double twist back twist pay-offs, longitudinal tape pay-offs, pre-twisters and diverse spooling units to create stranding lines for specific applications. For advanced data cable applications a double twist back twist pay-off capable of generating back twist ratios from 0%-100%, or even higher if required, is available. Optionally the double twist back twist pay-offs can be used to enable a triple twist stranding process. In this configuration the stranding speed and therefore the production capacity can be increased considerably and – as a consequence – production costs can be reduced further. Depending on line configurations, up to three foils can be applied in-line on the cable under controlled film tension (multi-taping). Because of the modular concept, these lines can be adapted to increasingly changing cable designs and specifications. The flexibility of the equipment lines allows for easy reconfiguration of a line for the manufacture of other kinds of cables in case a line is not fully utilised with the stranding of data and special cables. concept enables the realisation and modification of completely new manufacturing processes. And last but not least, the production of new products can be easily tested. A DSI 631 stranding machine is capable of pairing insulated conductors into uTP and FTP cables Category 5e and 6 with a bow speed of 4,200-4,800tpm. In case of the triple twist process, line speeds up to 6,000tpm can be reached. S/FTP cables Category 6 to 8e can be paired with a bow speed of 3,200 to 3,500tpm (with film). Further processing on a double twist stranding machine type DSI 1001 or a double twist bunching machine type D 1001 can be achieved with a bow speed of 2,500 to 3,000t/min (Cat. 5e and 6) or 2,000 to 2,500t/min (Cat. 6-7). Maschinenfabrik Niehoff GmbH & Co KG – Germany Website : www.niehoff.de Furthermore, the modular

WITh Niehoff’s high-speed rotating machines and numerous other production equipment application- specific lines can be configured to manufacture all types of data and special cables, including LAN cables in all categories – current, under development and future – with the utmost precision. In order to remain competitive, cable manufacturers need quality production equipment that saves energy and reduces raw materials and consumables consumption. The data and special cable stranding technology developed by Maschinenfabrik Niehoff meets these requirements. For the last 50 years, Niehoff has been building bunching and stranding machines. During this period, these machines have undergone continuous development resulting in the D series double twist bunching machines. This new series buncher is known for several new features including a single-bow design and a non-contact machine data transfer which significantly reduces energy consumption, noise emission and maintenance compared to conventional two-bow constructions. The successful concept of the D series bunchers is used as a basic platform for the DSI type double twist stranding machines. The DSI equipment is used for the manufacture of all kinds of data cables and special cables like sensor cables, signal cables, bus cables, instrumentation cables and LAN cables of all categories with the required precision. The double twist stranding machines DSI 631 and DSI 1001 are built for a maximum strand diameter of 8mm and 15mm, respectively. energy efficient drives, wind tunnel optimised bow profile, single-bow design and the use of other energy-saving components result in considerable operational energy savings. Compared to conventional stranding systems energy savings of 20% to 30% can be achieved under the same operating conditions. The machines built in left and right-hand versions can be combined with additional

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EuroWire – May 2012