WCA May 2013

Rosendahl’s new FOC multi-pass cooling trough

be adjusted independently from the first section. The shrinkage control capstan SCC100 is mounted on a rail system in this section of the cooling trough. Therefore the position of the SCC100 is easily adaptable for different product sizes or materials. Multi-pass section: When the loose tube is entering the multi-pass cooling trough the product is wound around the driven single wheel capstan (mid-span capstan) several times. After that the product is repeatedly wrapped around the free-running deflection pulleys in the spray cooled multi-pass section. At the exit of the multi-pass cooling trough the loose tube is wound around an integrated, tension controlled single wheel capstan (exit capstan). This new design concept allows a reduction of the total line length of approximately 7.5m with the advantage of no limitation in cooling capacity at higher production speeds. Rosendahl Maschinen GmbH – Austria Website : www.rosendahlaustria.com

The current trends in fibre optic cable manufacturing are all connected with the general optimisation of each step of the production process. In order to improve the performance of the cable, to reduce the costs of the final product, many technologies and devices have been invented to reduce optical loss, increase production speed and allow more flexibility in the manufacturing process. In the buffer tube process new technological developments in equipment have been made: • Improved high speed fibre payoff design with reduced footprint for space saving • Special feeding section of the ROEX extruder was designed to optimise the process ability of the typical material used for loose tube production • New development of the crosshead series RX for optimised material flow in the melt distributer in conjunction with a linear jelly needle guiding system for easier handling • Multi-pass cooling through with integrated midspan- and exit capstan

• New generation of pulley clenching capstan SCC100 for accurate post shrinkage and EFL control especially for dry tubes. Telescopic section: The distance from the crosshead to the cooling trough is adjustable. Additionally, the water in the first section is heated to allow an optimised temperature profile for different materials. Straight section: The water temperature in the second section can ❍ ❍ Multi-pass cooling trough from Rosendahl

36

Wire & Cable ASIA – May/June 2013

www.read-wca.com