Window cleaning with a water fed pole is increasing in
popularity across the world, and particularly in the UK.
With this increase in popularity comes many different
variations of pole the window cleaner can use, which
include, telescopic and modular, and are made with three
main materials which are Aluminium, Glass fibre, and Carbon
fibre These two main types can be further broken down in
the following ways..
Telescopic, which usually rely on clamping the individual
sections together, which keeps the sections at and desired
given height. The telescopic pole is the most widely used
and comes in the three main materials mentioned above,
which are aluminum, glass fibre, and carbon fibre.
Modular, Which usually relies on individual sections the
same diameter that join together, by either threaded parts
on each end, or by wedging one part inside the other.
The three main materials currently used as you can imagine
have different properties with the Carbon fibre being the
lightest and stiffest, followed by the aluminum, then the
glassfibre. Cost wise as well they follow the same
sequence with carbon fibre being the most expensive
followed by aluminum, then glassfibre. Please remember
that different grades and processing techniques have a lot
to do with the final quality of the pole, and the price of
the pole.
There are quite a few manufacturing processes involve in
the manufacturing of the sections which we will take a look
at, and which we will break down into two groups, Aluminum,
and the Fibres (glass and carbon)
Firstly the aluminum sections can be made from rolling
sheets of aluminum, or extruding. Rolling like the name
suggests is a flat piece of aluminum with the wall
thickness of the tube to be made, rolled around a mandrel
and joined together to form the finished tube. Extruded is
a bit more complicated and relies on soft aluminum being
forced through a heated die the shape of the section which
is being made.
Glass and carbon fibre sections have a few more ways in
which they can be made, and here we will look at the most
popular.
Rolled, much the same as the aluminum rolled, but the
material rolled is impregnated matting. The matting is
impregnated with a hardening resin, and rolled round a
mandrel to form the desired shape, and then heated in an
oven to cure. Once cured it is then removed from the
mandrel and ready for use.
Pultruded, The pultruding is much the same process as for
the aluminum except instead of being pushed through a die,
it is pulled through. Individual fibres or strands and
impregnated with hardening resin and pulled through a
heated die which forms the shape, and hardens it. A chop
saw then cuts the sections to the desired length
automatically at the end of the process.
Pull winding, The same as pultruding except a winding
machine is place in front of the die which allows strands
to be wound round the tube as well as longitudinal strand
running the whole length of the tube.
Filament winding, Again there is a mandrel and impregnated
strands, this time the mandrel is spinning and the strands
are fed onto the mandrel at a in a preset sequence, once
the desired thickness has been achieved the mandrel and
attached sections are left to cure, before the finished
section is removed.
The above methods have there advantages and disadvantages.
For instance the rolled tubes, and filament wound tubes,
are time consuming and labour intensive, so more expensive
for individual sections, but are ideal for short runs where
samples are essential. The pultrusion, pull winding,
extruding, are very little labour involved and are ideal
for mass production. Cost per tube is very low, but the
initial outlay is much higher with set-up costs and die
costs.
Aquatec systems a UK based window cleaning supply company
is working on a new type pole, one which is telescopic but
dosn't rely on clamps. The advantage of this type of pole
will be no time wasted manually putting up each section,
and then clamping it, only to do the same to put the pole
away. A flick of the wrist will put the pole up to working
height, and a movement of the hand will fully close the
pole again. All the time the operator is working the pole
will stay at the desired working height.
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Peter Fogwill can be contacted by email to discuss any pole
design manufacturing process, or the new clamp less pole by
email
peter@window-tools.com
or website
http://www.window-tools.com