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Pressure Jet has achieved
tremendous success on a new feature of Wet
sandblasting machines.
There are a
wide variety of surface preparation methods available, such as solvent cleaning,
power-tool cleaning, dry sand blasting etc. But, all these conventional methods
are rarely used because they are time consuming, not cost effective & provide
poor cleaning results & also create environmental pollution.
Nowadays,
water sandblasting by high pressure waterjet pump has got wide
acceptance in the field of surface preparation as well as in paint removal &
rust Removal. In wet sandblasting, an abrasive material is mixed with the
waterjet to create an abrasive spray. This abrasive spray is blasted on the
surface, which breaks away small pieces of undesirable coating corrosion or
other undesirable substances to create the desired metal finish, perfect for
recoating.
Wet
sandblasting
machine is widely used in engineering, heavy engineering, fabrication,
construction and many other industries for different applications.
HOW WATER SANDBLASTING WORKS?
Start the high
pressure system and adjust the water flow and system pressure with your nozzle
selection, pump RPM and Regulating Unloader setting. Open the trigger on gun to
assure system is operating properly.
Place the sand
induction probe in the sand supply container. With the trigger on the gun open,
adjust the small valve on the mixing head. The adjustment creates a vacuum in
the sand hose line and starts the flow of sand. The
pressure washer sandblaster
should be approximately 12
to 15 inches away from the work surface when the trigger is opened and the
water sandblasting operation begins.
NOTE:
Test a sample area to be
certain that surface will not be damaged by abrasive action.
The angle of
attack and distance from the work surface may be varied to provide the best work
speed, while still maintaining the greatest amount of impact energy. For optimum
performance the sand inlet hose should not exceed 25 feet.
When the
wet sand blasting machine
is operating efficiently,
there will be a smooth and continuous flow of sand through the nozzle. The
amount of sand flow is directly related to the vacuum created in mixing nozzle.
The intensity of the vacuum is dependent upon the liquid velocity of the water.
The pressure
and flow rate through the spray nozzle are the factors that determine the liquid
velocity, amount of vacuum and rate of sand flow.
If the spray
nozzle is chosen to give the maximum pressure and flow rate possible for the
pump, the rate of sand flow will also be at maximum. Total vacuum seal and
maximum swirl velocity are obtained at 5º spray nozzle.
ADVANTAGES
-
Because of the water
ingredient, it will not create any environmental pollution problem caused by
fluttering the micro power.
-
It can remove the burrs
(surface projections) & scales formed on surface and clean the surface
without damaging the work piece.
-
The surface finishing
can access a homogeneous matte finish (spot pattern). It can contribute
significantly to the finishing demand for surface roughness.
-
It only applies small
shot blasting effect to the surface to be finished and improve and reinforce
the material of work piece.
-
The foreign materials
after being removed will be rinsed and flushed out by the jet of water.
-
It doesn't require any
chemical during operation.
-
It doesn't affect the
dimensions of the object.
LIMITATIONS
-
Antirust inhibitor is to
be used after cleaning ferrous material.
-
Though water consumption
is not too high, it is to be taken in to account to dispose it off or
recycled.
-
The surface roughness is
more than dry sand blasting.
APPLICATIONS
-
Paint removal, rust
removal, corrosion removal & scale removal
-
Casting Cleaning
-
Ship hull cleaning
-
Clean & peen precision
parts
-
Clean areas, which are
not accessible to hand sanders
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Produce and anchor
pattern ideal for uniform finishing
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Deburr machined parts
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Blend light scratches
and tool marks
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Deflash plastic and
metal parts
-
Stone cleaning /
designing
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