EoW November 2008

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EuroWire – November 2008 29
english technology news
Gillard has enlarged its range of precision
caterpillar haul-off/take-off machines.
The new machines are extra long belt
versions of the Gillard ‘work-horse’ range.
The extended belts are now available in
lengths of either 1,500mm or 1,800mm.
Belt widths are either 225mm or 300mm.
Gillard claims that these longer belts
enable higher tractive efforts to be
achieved with considerably less clamping
pressure on the extruded products.
This avoids distortion and damage,
particularly to thin-wall products.
The new caterpillars also feature an
updated drive package with direct
drive AC servomotors to power the
belts. Two digital servo drives are
used in a master/slave configuration
for optimum speed control.
The top belt is designed to ‘float’ over
any lumps or bumps created during
the start-up of the extrusion line. The
entire top boom is suspended on two
air cylinders at either end. This allows
the belt to automatically raise and
lower itself over the lumps whilst still
maintaining an adequate grip on the
extrusion.
The machines are fully guarded to
the latest CE standards. Gillard offers
a wide range of options to enable
users to customise their machine to
their needs.
Peter Gillard & Co Ltd – UK
Fax: +44 1684 290330
Email:
Website :
New puller range with
heavy duty haul-offs
New Gillard machine has longer belts for less pressure on extrusions ▲ ▲
Condorcoat K75 is believed to be the
only finish that replaces traditional
multi-stage zinc phosphate in cold
forming. The process is straightforward
and safe, extremely bonding and efficient
even for extreme deformation.
Condoroil’s research for an alternative
product to zinc phosphate has been
carried out in order to propose a short
and efficient process and, above all,
a harmless product.
With Condorcoat K75 the required steps
for the material preparation, pickled
or sand blasted, are reduced from the
traditional four (activation, phosphating
rinse and calcination) to just a single
step and is easily integrated with the
cold forming process itself.
No rinse nor final neutralisation are
required; this makes a water purification
plant unnecessary, while the different
nature of the conversion product
eliminates the need for either a
filtering or sedimentation plant in the
phosphating tank.
This means a reduction in the plant and
management costs for water treatment
and sludge disposal.
The chemical reaction with the metal
makes the product bond, even in
cases of extreme deformation, unlike a
deposit that is bonded only physically
to the material, such as in the case of
non-reactive salts, which cannot stand
the tensions related to the most extreme
deformations especially on steel with a
high carbon content.
The product is stable towards the acid
drag outs from the previous pickling
tanks. The drag outs cause balance
problems in the acidity ratio in a
phosphating bath (and even more in
a bath with non-reactive salts) and
determine the formation of a defective
coating.
The product leaves a rough surface finish
that promotes the adhesion of the soap
and lubricating oil.
The dry deposit provides excellent
corrosion resistance, important for
applications where working does not
follow immediately after the treatment.
The deposit, when dry, is stable to
humidity: a deposit that is too sensitive
to humidity can hydrate, causing rust
problems as well as reduction of die
performance due to the interaction of
water with oils and lubricating oils.
Condoroil Impianti Srl – Italy
Fax: +39 0332 945303
Email:
Website:
Replacing zinc phosphate in cold forming applications