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Wire & Cable ASIA – January/February 2009 43
For over 50 years, Niehoff has been developing a wide range of wire drawing machines and lines which cover all process steps
in the non-ferrous wire drawing and in-line annealing process. Wire drawing machinery supplied by Niehoff is currently being
used to produce wire from copper, copper alloys, aluminium, aluminium alloys, bi-metals such as copper clad aluminium and
steel, plated copper, and multiple other kinds of composites as well as wire made of special materials with final diameters down
to 0.014mm. The most recent additions are the new MSM224 drawing machine for the intermediate wire range and the MT200/
RI170.2 telephone cable wire drawing line which was introduced at the wire 2008 trade show.
The MSM224 drawing machine is Niehoff’s latest offering for drawing wires made of copper alloys such as brass, bronze,
German silver, nickel and nickel alloys as well as other non-ferrous metals like platinum, rhodium and special materials. This
machine is designed for an inlet diameter of 3.5mm and a final diameter range of 0.8mm to 1.8mm and can work with speeds
up to 25 m/s. The drawing capstans are individually driven by water-cooled motors. This drive principle enables a minimised
slip operation resulting in wire with a very high surface quality. Other characteristics include a completely submerged drawing
section and die holders with high-pressure lubrication. The MSM224 drawing machine can be combined with an inductive
continuous annealer type RI250 or RI170 developed by the joint venture company Niehoff-Bühler GmbH NBM.
The MT200/RI170.2 tandem wire drawing line (pictured) consists of a redesigned cone type draw box, the MT200, with an
integrated RI170.2 inductive annealer and preheater and is designed for tandem inline operation with an extrusion line. The
annealing technology was derived from the same inductive annealer
technology as mentioned above, which has been successfully proven for
years in various annealing applications. Optionally the annealer can be
equipped with a calibration draft to guarantee close tolerances of the wire
properties. Using dancer control, the line can be combined and synchronised
with all existing types of extruders. A non-contacting temperature measuring
system controls the wire temperature between annealer and extruder.
The established MMH type multiwire drawing machines with an integrated
RM continuous resistance annealer can simultaneously produce up to
48 wires with single wire final diameters of up to 0.05mm. These wires are
characterised by highly homogeneous properties.
In addition to multiwire drawing machines for copper wire, Niehoff offers
8 and 16-wire drawing machines for aluminium and aluminium alloy wires.
The latest electronic control systems and drive technology implemented in
the above machines have been introduced into multiwire drawing technology
for plated wires and special applications.
The Niehoff range of drawing machines is completed by the MKN101 wet drawing machine. It is based on a compact modular
concept that enables extreme flexibility and scalable configurations. The machine is designed for superfine wires made of
copper, aluminium, and non-ferrous alloys, as well as precious metals and their alloys with final diameters down to 0.014mm.
All these drawing machines can be configured for inline operation with a continuous annealer. Niehoff and Niehoff Bühler NBM
offer a broad range of conductive and inductive continuous annealers specially designed to the specific properties of all kinds
of non-ferrous wires.
Maschinenfabrik Niehoff GmbH & Co KG – Germany Fax: +49 9122 977 155
Email: Website :
PC wire line
Mario Frigerio has a range of wire drawing lines available, including a
new PC wire line for wires of up to 13mm diameter used for high-speed
train sleepers. The in-line cutting system can carry out up to 60 cuts per
minute.
In order to produce straight wires at this diameter, the Mario Frigerio
machine has twin capstans of 5,200mm diameter. This flexible machine
allows the end user to treat 2/3 wires or a 7-wires strand. It uses a twin
take-up/payoff spooling unit, the fully automatic Mario Frigerio layer
winder.
This line is equipped with a 500 kW furnace that allows a run speed of up
to 400m per minute, in batches of 6 tons on the treatment line payoff, and
double load on strand take-up/payoff. It has a 1,200mm capstan drawing
line, made by Mario Frigerio, with horizontal payoff and the DIN 1600
spooler.
Mario Frigerio SpA – Italy Fax: +39 0341 368 385
Email: Website :
Drawing equipment from Mario Frigerio ❍ ❍
Continuous development in drawing technology
The MT200/RI170.2 tandem wire drawing line ❍ ❍