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Pressure Blasting Machines |
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SAND BLASTING MACHINE |
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Vohras International offers Sand blasting machines in
Portable as well Cabinet models in Pressure blast, Suction blast,
Wet blast as well Complete Blast Rooms & Sand blasting Nozzles. Details of Sand
blasting machines are as below : |
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What is Sand
Blasting : Sand Blasting procedure : |
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Sand blasting is the act of propelling very fine bits of material,
called abrasives, at high-velocity, with the help of air pressure
using a compressor, through a nozzle to clean or etch the surface.
Sand used to be the most commonly used material, but due to the
health problems such as lung disease, caused by extended inhalation
of the dust created by sand, other materials such as Aluminium
oxide, Glass beads, Copper slag, Steel shots, steel grit,
Walnut & even the coconut shells are now used in its place.
Any small, relatively uniform particles can be used in sand blasting
process but the process must be carefully controlled, using an
alternate air supply, with proper protective wear and ventilation. |
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We have to use a a Sand blasting machine, that can be a Portable one or a Cabinet model,
that can be a pressure blast, suction blast or a wet blasting
machine, a compressor for air required, a sand blasting nozzle
& the abrasives to do a job. It can be used for sand blasting,
cleaning & finishing as well to etch or carve a design or to write
some words over components or on glass. Portable models can be used
openly or in closed chambers called Blast rooms but using an
alternate air supply, with proper protective wear and ventilation. |
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Models of Sand
Blasting Machines :
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Sand blasting machines are available in Portable as well
Cabinet models as below : |
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Portable Sand Blasting Machines : |
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Portable sand blasting machines are used for cleaning and finishing of bigger
components, big tanks, Structures. It is a dry process & can be
used in the open, though it is more suitable in a closed chamber
blast room, with lights, ventilation & dust collection system. The Blasting media is to be re loaded and it works by Air
pressure through a Sand blasting nozzle, affixed in the Hose pipe.
Various sizes are available such as 150 KG, 300 KG, 500 KG, 900KG,
1000 KG & more. The best possible advantage of this mode is that
it can be taken to the site very easily. |
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Cabinet Model Sand Blasting
Machines :
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Cabinet Models of Sand Blasting
machines are
suitable for in house work as they are attached with a suitable
dust collection system. The range of sand blasting machines in
cabinet models include includes Pressure blasting, Suction
blasting & Wet blasting machines. Pressure blasters are used
for castings, forgings or hard materials whereas Suction blaster
is used for Aluminium, Brass, Gun metal parts / components, as below : |
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Pressure Blasting Machines : |
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Pressure blasting machines are useful for the finishing and cleaning of castings, forgings as
well hardened or tempered components or when we have to remove
heavy corrosion, tough coatings and when the production rate is
higher. In the Pressure blasting cabinets, hands are mounted in the
rubber gloves and by holding nozzle in hands the operator can do the
Sand blasting and view the same through the mirror. Nozzles can also
be wall mounted. Rotary table, Motorised rotary table as well
tumbling baskets are available as optional accessories. Continuous
conveyor model machines are also available with multiple nozzles.
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Suction Blasting
Machines : |
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Suction blasting machines are more suitable for cleaning & finishing of
Non Ferrous components Ex: Aluminium ,
Zinc , Brass, Gun Metal, etc.
The suction blasting system has a Suction blasting nozzle instead of
a pressure blasting and is therefore a cost effective solution as it
uses less compressed air.
Suction Blast machines provide the ideal cleaning and finishing
solution to many coating and corrosion problems and very ideally
suited to ensuring a decorative or aesthetically and pleasing
surface finish across components. Glass beads, Aluminium oxide can
be used as abrasive materials in the Suction blasting cabinets.
Nozzles can be holded by hands or wall mounted. Rotary
table, Motorised rotary table as well
tumbling baskets are available as optional accessories. Continuous
conveyor model machines are also available with multiple nozzles.
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Wet Blasting Machines
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Wet blasting, similarly to dry blasting, is the use of an abrasive
media and compressed air to achieve a desired finish on a chosen
surface. It is generally used for cleaning and finishing of
components which require additional brightness. Its also called
Liquid Honing process. Blasting media as a slurry is processed in
the machine and components are finished as a wet process.
Different types of abrasive media can be used in a wet
blasting system and this is determined by the type of effect or
finish that is required. Typically users will opt for a silicon
glass bead for a “polished” finish or an aluminium oxide to achieve
a “cutting” effect resulting into a matt finish. However, medias
such as ceramic, plastics and steel shot can also be used on
particular applications. |
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Blast rooms :
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for cleaning and finishing of big & heavy components in a closed
chamber called Blast room. It can have the Auto re cycling /
manual collection of Blasting media. Generally Portable model of
Sand blasting machines are used in the Blast rooms. But blast
rooms with multiple nozzles and reciprocation if required at
various angles can also be made available. These are the closed
chamber systems but duly ventilated, lighted and with a suitable
Dust collection system for smooth functioning. |
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Sample pics of some components |
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before & after sand blasting
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Before sand
blasting
After sand blasting
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Before sand blasting
After sand blasting |
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Sand
Blasting Nozzles |
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for
any more details, quotations, catalogues, Free Trials, please feel free to contact : |
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VOHRAS INTERNATIONAL
F-19/10, Krishan Nagar,
Delhi-51 (India)
Mobile: 0091 -
9212004471
metalfinishing@yahoo.co.in |
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