November 2014
34
EuroWire – January 2012
Cutting-edge Niehoff!
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Interior of a DSI 1001 type double-twist stranding machine
Technologynews
r 2014
Cables must meet ever more demanding
tasks. As a consequence, cable design is
continually becoming more complex. In
order to comply with these requirements,
cable manufacturers need up-to-date
equipment which operates economically
and can be used to produce reliably
and efficiently all types of data and
special cables. The DSI type double-twist
stranding machines developed by Niehoff
meet all these requirements.
The DSI stranding concept is based on
the successful design of Niehoff’s D series
double-twist bunching machines, which
represents a long-established experience
in the design of wire bunching and cable
stranding machines dating back to the
late 1960s. After the newly developed
series D bunching machine had been
met with great acclaim by the market on
its introduction in 1997, the first Niehoff
stranding machine followed in the early
2000s, based on this series of machines.
The already field proven double-twist
stranding machines DSI 631 and DSI 1001
are designed to manufacture insulated
conductors into pairs or quads or to strand
conductor pairs into special cables with or
without foils.
Compared to conventional cable stranding
machines, energy consumption and
noise emissions of the DSI machines are
significantly reduced due to their one-bow
design and a state-of-the-art energy saving
drive technology. A further characteristic
is the contactless machine data transfer
system which minimises maintenance and
operational and material costs. The new
DSI type machines are equipped with the
newly designed and standardised NMI
(Niehoff Machine Interface) touch-screen
display with colour user interface and
simplified navigation structure.
The DSI machines are built for a wide
conductor cross section range and a
maximum strand diameter of 8.5mm or
15mm, respectively. The lay length can be
freely adjusted over a wide range within a
very narrow tolerance band.
A DSI stranding machine can be combined
with a whole range of units and pay-offs
as well thanks to its modular design. One
of the special features is the double-twist
backtwist pay-off, which enables up
to three foils to be applied to a cable
under controlled foil tension in inline
operation. With the ‘triple twist’ function,
the production speed can be substantially
increased even further.
Because of the modular concept, DSI
stranding lines can be adapted to the
requirements of each user and flexibly
modified to manufacturing scheduling and
planning and to changing cable designs
and specifications. If a line is not fully
utilised with the stranding of data cables,
it can be used to manufacture other cables.
It is also possible to realise completely the
new manufacturing processes and to test
the production of new products.
Maschinenfabrik Niehoff GmbH & Co KG
– Germany
Website
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