EuroWire May 2017

Technology News

New for Rosendahl

EXTRUSION technology is not only the line’s core, but Rosendahl’s business core, as well. This is where the company does most of its R&D activities and where it gets the results for its customers. Now it is not only cables that Rosendahl extrudes. The Austrian cable machine maker has extended its know-how for steel rope extrusion. Such jacketed steel ropes are commonly applied for stay cables or mono-strands. Stay cables are primarily used for cable-stayed bridges. Unbounded mono-strands are used in civil engineering in pre-stressed concrete structures (PT systems). Often, several single cables (mono-strand) are combined into a bundle (multi- strand), as well. A single strand usually has a diameter of ¼" to 1 1 / 8 ". Other dimensions are also available.

Before jacketing, these strands are coated with a special anti-corrosion material. Rosendahl applies a permanent elastic corrosion protection, grease or wax, to those strands. This coating provides corrosion protection and length watertightness, and it reduces internal friction. The tricky part is to coat the individual steel wires with grease or wax. Specifically for this type of rope preservation, Rosendahl has developed new rope conservation machine which is used immediately prior to the application of the PE jacket. The company has introduced a new on-line monitoring system for the grease/ wax coating application. This ensures high quality and performance control during the entire conservation process. RosendahlNextrom – Austria Website : www.rosendahlnextrom.com

High-speed taping at 1,000rpm

▲ ▲ Rosendahl’s helical tape applicator Rota 500

used for both inline and offline solutions. Very long tape lengths can be applied by using large tape spool sizes (500mm in diameter and 500mm in length) on a carton core. Different cable applications require different taping materials. Some examples are as a separator material between the cable core and the jacket, or a water swellable tape or powder taping, etc. The Rota 500 not only provides for flexibility, but also for a high degree of productivity. RosendahlNextrom – Austria Website : www.rosendahlnextrom.com

Rosendahl’s new solution for helical taping works at high speeds – both inline and offline. Cable production at high speeds with long production lengths has become a common requirement for manufacturers. Not only does it support continuous production, but it also raises the return on investment. For those cables that require helical taping, Rosendahl has introduced the Rota 500 helical tape applicator. It is designed for polymer tape materials and supports high-speed taping of up to 1,000rpm. Products from 20 to 60mm in diameter can be taped on the Rota 500.

It is a concentric tape applicator that is

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May 2017