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46 Wire & Cable ASIA – July/August 2016
The PWC-S system performs wire cleaning and polishing
in-line with the wire drawing machine at 6 to 12 m/s (1,200
to 2,400 ft/min). The exceptional cleanliness that is obtained
allows wire direct brass coating, copper coating, galvanising
and wire cleaning prior to heat treatment, and coating
applications including patenting, annealing, painting, plastic
coating, etc.
The system incorporates new technology that enables
normal cold plant water to be converted into a unique
cleaning medium generating high pressure wetting/
contaminants extreme pressure extrusion hydrodynamic
cavitation displace/and contaminants flush out, used to
clean drawn wire at high speed in a completely green
application, providing wire glossy finish in plating quality,
exiting the unit totally dry.
The PWC-S system effectively removes lubricant residue
from the base material and is particularly recommended
for cleaning applications with wires drawn upon severe
conditions resulting in increased heat and burned lubricant
tightly bound to the wire surface and embedded in
micro-cavities. For a clean mirror reflective wire finish for
decorative applications, the system can be used with
emulsion including a new rust preventive additive diluted at
3 to 5 per cent concentration.
The PWC-S unit is compact and can be easily installed on
the finishing/last block of a wire drawing machine.
The system provides the ultimate combination of simplicity
and effectiveness: acid-free, caustic-free, without ultrasonic,
without chemicals, hermetically sealed zero-emission
system, no fumes, and no foam.
Economical and environmentally friendly, the system
provides significant process savings in production of clean
wire.
Decalub – France
Website:
VNT dies for smaller sizes
VNT dies were introduced for compacting and drawing for larger sizes, and they are now available for RBD and intermediate
(smaller) sizes. Ajex & Turner is the first company in India to introduce VNT dies in the range from 0.8 to 70mm for copper/
aluminium/stainless steel/CO2/MIG/high and low carbon wire.
The comparison between VNT dies and tungsten carbide dies shows that the tungsten carbide dies are the most popular
due to low prices but quickly lose tolerance and do not possess the precious low-friction characteristic. As far as PCD dies
are concerned though, they are better than tungsten carbide dies in terms of characteristics but the high rates of PCD dies,
equally increases with bigger hole diameter. For largest diameter of compacting power cables, the prices of PCD dies goes
completely out of reach, increasing the production cost.
The fair comparison makes it clear that
the VNT die is the best solution due to
economic and performance. It has multi-
layer coating of pure nanocrystalline
diamond and is not mixed with any other
hard material. Due to its diamond coating
there is less friction on the wire surface,
which also gives good wire surface finish
and the same characteristic of diamond
coating, maintaining +0 tolerance through-
out its working life.
It plays a major role in reducing copper and
aluminium dust, thus saving the metal.
Ajex & Turner – India
Website:
❍ A range of dies from Ajex & Turner
Wire green cleaning provides
glossy finish resisting corrosion
❍ Wire cleaning by PWC-S system
Dies Feature