EoW May 2012

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EuroWire – May 2012 33
News
Technology
CANDOR Sweden AB
Tel: +46 11 21 75 00 Email:
Fax: +46 11 12 63 12 Website:
clean wire
after drawing
candor
can do wire
equipment
Electrolytic plating
◆
Candojet hot water cleaning
◆
Electrolytic & Ultrasonic
◆
degreasing
Welding wire cleaning and
◆
copper coating
Pickling & phosphating
◆
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
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.
Furthermore, the modular 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:
Stranding in
high-tech mode