EoW May 2012

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EuroWire – May 2012 61
F c s
Italy
OM Lesmo Group has been manufacturing rotating equipment
in Italy since 1962. Its chosen machine colour is green, but there
is more to the machines than the colour green.
Since the production of the very first rotating machine, OM
Lesmo engineers have incorporated energy savings as an
intricate part of their machine design.
OM Lesmo claims to be the first company to introduce and
patent single bow design in its double twist machines instead of
the traditional design with two bows. This design not only allows
higher rotating speeds, but also results in energy savings.
The single bow technology is also used in some of the single
twist machines, where a single rotating arm is used instead
of the traditional two-arm design. By using only one bow or
arm, the inertia is reduced and the energy needed to rotate
is also reduced. The bow path is designed in a very efficient
aerodynamic shape to reduce the wind resistance.
The single bow concept is also adopted in the company’s latest
1,250mm single twist machine, MTO1250-CT.
The use of an aerodynamic, carbon fibre, single-arm design not
only allows higher rotating speeds, but also saves energy.
O cine Meccaniche di Lesmo SpA – Italy
Website:
WTM, based in Padova, Italy, specialises in equipment for the
wire industry, and has enhanced the process of single stranding
with its single twisting machines coupled with its new-concept
concentric backtwist feeders.
The formation of high quality, sophisticated cables (highest CAT
number) is made easier: the rotating dancers control with high
accuracy the tension of the cable to be twisted, at the outlet of
the backtwist feeder.
The pre-torsioned cables go in stranding directly without
touching anything else, ie pulleys, dancers, etc. In this way
the lay-length is constant and without any disruption, thus
achieving the highest level of final strands.
One of the most relevant characteristics of this new concept of
single twisting line is the productivity increase, claimed to be
more than two times that of traditional ‘cage’ backwist feeders.
The single torsion unit can work up to 1,200 rpm (torsions); in
combination with the newly developed backtwist feeder, it is
possible to obtain 100% backtwisted strand at 600-700 rpm.
Another advantage is the compactness of the system, which
allows a complete 12+1 twisting line in less than 17m, saving
precious space in the workshop.
All of the machines composing the twisting lines have no
electric parts in rotation, and every motor, control and
regulation card is placed in a stable, fixed base, reducing any
possible maintenance.
The line can be completed with other WTM equipment, such
as tape applicators, binders and compacting dies. Mechanical
tests of the cables can also be carried out using WTM’s testing
equipment.
WTM Srl – Italy
Website:
Serindgamma produces washing-salting and pickling
plants, and specialises in in-line cleaning machines with
both mechanical and chemical operations. The machines
are entirely manufactured in the company’s factory in
Magenta, Milan.
The flexibility of the company’s technical departments to
study and manufacture customised solutions, using tested
technology in order to solve problems linked to wire and
cable production, has brought the company commissions
from all over the world.
The plants are normally equipped with the latest
generation ultrasound technology, controlled by
microprocessor, that works with several frequencies for
simultaneous cleaning of aluminium and stainless steel
wires without any risk of damaging the surface.
These plants are composed of multi-tank
washing-solutions; the number and dimension of the
tanks is determined by the treatment and chemical
process required, and the process speed. Additional air
blowing and/or heating treatment for drying the wires
ensures a perfectly cleaned surface, in order that the
wire reaches the post-operations completely dried. The
machines are able to treat up to 26 wires in-line.
Serindgamma Srl – Italy
Website:
More to green than just the colour!
A new concept in
backtwist feeders
Wire cleaning
ltechnology