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is Powder Coating ?
coating is an alternative, environment friendly method
of applying Paint.
Normally, to apply a 'wet' Paint, solvents
are required to allow the Paint to become a liquid thus
allowing it to be applied to the object to be Painted
the solvent also make the paint sticky, causing it to
adhere to the surface.
With Powder Coating, only the Paint solids
are sprayed onto the product, in an atomised powder form.
The Powder is drawn to the product and adheres to the
product due to an electrostatic
charge applied to the Powder during spraying.
The Product, thus covered with the Powder Paint is then
heated (to around 200 degrees Centigrade) in an Oven,
wherein the powder fuses (melts) on to the product and
thus forms a smooth, tough and resilient coating.
Click on the image to see
a movie of a Powder Plant
Here you can download RDM brochures relevant
to Powder Coating
Jet Cartridge Booths for simple Powder Extraction
Cyclone Booths for Powder Extraction and Recovery
for Powder Curing and Drying
Booths for simple, lowest cost Powder Extraction
Line Pre-Treatment Cleaning Plant
Tank Pre-Treatment Cleaning Plant
are the benefits or Powder Coating?
the powder is fused onto the product, it has excellent
scratch resistance properties. It also has a pleasing
'smooth' appearance and forms a sealed skin around the
product thus minimising corrosion risk.
Unlike wet paint, 'Over spray' powders can be collected
and re-used! When you consider that in any paint spraying
system, only around 50% of the paint for powder) actually
lards on the job, then large savings are clearly possible
if the over spray can be re-used.
powder is applied electrostatically, is fully recoverable
and is easily cleaned away, powder is ideally suited to
simple, automatic application thus minimising labour requirements.
Typical RDM Alloy Wheel Refurbishment Plants
plants offer simple parts handling, compact Ovens, low run
cost booth and stripping tanks
on the images to the right to see a manual setup in
Typical RDM Conveyorised Powder Plant
plants are available in a huge range of types and sizes
to suit different product size and throuputs.
Powder Coat Plant Pretreatment System
coat application. For
most applications, a single thick powder application is
quite possible. This eliminates the need for primers,
multi-coat-wet painting and for rubbing down between coats.
friendly with no Solvents. It
is therefore, safer to use and more easily complies with all current and proposed
Spillages, overspray, etc., can literally be vacuumed
do you need to get Powder Coating?
The first requirement of any Powder Coating System is a
Spraybooth in which to apply the Powder. This serves a number of functions:
1) It ensures that oversprayed Powder is ventilated away from the Operator(s)
2) It provides extraction to prevent Powder escaping into the factory areas
3) It collects the Powder and can provide facility for reclaiming overspray Powder
Booth Schematic Layout
Oven : All Powders cure at high temperatures, usually between
160 and 220 Centigrade. Therefore an Oven is required to place the parts after
they have been sprayed.
A number of types of Oven are available, including:
1) Box Type
Ovens, into which the product may be wheeled or carried.
Ovens, whereby the product is hung from a motorised
track which passes through the Oven.
The Spraying System is the device that applies the Powder.
This is often called the 'Powder Gun' and serves the following
1) It has a system for storing new and recycled Powder,
often this may be the Box in which it is delivered from
2) It fluidises the Powder i.e. it gently blows air into
the Powder, effectively bestowing it with the characteristics
of a liquid.
3) It has a nozzle system which allows the Powder to be
blown onto the product.
4) It has an Electrostatic charging system which charges
the Powder Particles causing them to be attracted to the
part requiring coating.
Treatment : Before a Powder finish can be successfully applied,
the surface of the item to be painted should be clean and meticulously free from
any type of oil or grease contamination.
1) To remove this contamination
from the product it is usual for metal products to be 'Pre-Treated'
prior to either a Paint or a Powder coating being applied.
2) The RDM Aqueous
Combined Degrease/Phosphate Plants are ideally suited to 'Pre Treating' metal
products, with the degrease chemicals removing any oils and the phosphate chemical
providing the chemical reaction to provide an ideal surface key.
RDM "Modular" Powder Coating Booth System is a World
First. For the first time the customer can choose any size or style of work or
operator openings to suit their needs and they only pay for a booth by its overall
size. The use of CAD and flexible manufacturing has made this possible at an incredible
on the image to see a movie
Typical Roll on Roll off Powder Booth Installation.
can choose between a low cost galvanised finish. a superb epoxy powder coated
finish or our top quality all stainless steel construction.
a large range of high efficiency cyclones and powder afterfilters to suit different
RDM range of all Modular Powder Coating Booths offers the best possible combination
of maximum operator safety, powder recovery, efficiency and economy. By replacing
the traditional 'custom' design and build method with a simple modular concept,
RDM can supply a powder
system to meet the most demanding delivery and budget requirements.
systems can be delivered in simple kit form to enable our engineers to erect and
install on site with the minimum disruption.