EuroWire May 2017

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May 2017 35
Technology
News
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
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:
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 11/8".
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:
▲ ▲ Rosendahl’s helical tape applicator Rota 500
New for Rosendahl
High-speed taping at 1,000rpm