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On the preservation line,
sheets and profiles are thoroughly blast cleaned and provided with a temporary corrosion protection coating. Along with the external transportation unit, the preservation line consists of a pass
through blasting
painting equipment, a
painting unit and a drying tunnel with its associated slat conveyor.
Typical plates widths can
vary up to 2500mm, height can vary from 5mm to 1000mm, length can vary from 2000mm to 12000mm.
Overview of
Paint Blasting Machine in Preservation Lines
A shot blast and primed machine usually consists of
specially engineered conveyor systems, a roller conveyor shot blast machine, a pre-heater, an automatic paint spray system and a subsequent dryer. Depending on the customer requirements,
different types of conveyor systems may be used, such as roller conveyors, chain or slat conveyors, cross conveyors, etc. The entire line is totally engineered around the specific application and
size and geometry of the parts.
The Process of Preservation
Lines
1. Workpiece conveyor
system
The roller conveyor shot
blast systems are an essential part of the overall preservation line. The parts (large steel sheets, tubes and round bars, angle bars and I-beams) travel on a roller conveyor through the
pre-heater chamber, the blast chamber and a blow-off/brush-off station.
The whole roller conveyor
system adopts frequency control step-less speed regulation, is able to synchronous running, each department is capable of independent action.
Blast cabinet’ rollers are
with special wear-resistant sleeves to prevent blasting abrasion.
Plate chain conveyor with
"v" shaped structure, painted steel short-term exposure to avoid film damage.
2. Blasting cleaning
As with all roller conveyors
Blast Machines the shot blasting cabinet liner is manufactured completely from high manganese. High manganese has a property which is hard enough to deal with the shot blasting from 35HRC to more
than 60HRC. They are attached from the outside and are easy to replace. When aggressive shot is used, additional lining of high manganese, tool steel or cast material can be provided. To avoid
shot leakage, several rubber layers or curtains are fitted in areas of heavy wear. These are mounted in a V-Track and are easy to replace.
3. Abrasive cleaning
up
To avoid blast media
building upon long parts, the rotation brushes remove the spent abrasive from the workpieces surface into a specially designed trough that has a screw conveyor taking the media back into
circulation. To keep the position between the brushes and the screw conveyor constant when blasting different sized work pieces, both are built with the same adjustable framework. Finally, any
remaining media on the work pieces will be removed by the blow off station, which is mounted on the same framework and uses high pressure ventilators to blow off any media remaining.
4. Dust collector
system
2-level dust collector:
settling chamber and cartridge filters. Cleaning efficiency is up to 99.5%.
Filter material from
Donaldson, effective filtration area of each filter is up to 15 m³.
Air shock valve with timing
device can clean filters regularly.
Economical
The cartridge dust collector
is an economical choice because it requires minimal maintenance: only periodic cartridge replacement is necessary.
Fast, simple and safe
cartridge replacement
Cartridge replacement is
performed outside the dust collector and requires no tools. This eliminates the need to work within a confined space and allows the worker to access the cartridge without getting dirty.
5. Spray room
After shot blasting the
metal roll goes to painting booth. The painting equipment provides the coating thickness 15-20 micron.
To avoid the raw paint
damage the metal roll is transferred by the chain conveyor with bearing elements. It provides minimal contact with painted surface. The paint that couldn’t reach the product is taken with air
flow and directed to labyrinth filters. The filtered exhaust air is emitted to the atmosphere.
6. Drying room
The primer drying chamber
works in recycling mode: the heated air is fed from the preliminary drying chamber with 10-15% fresh air intake from “outdoors” to prevent the recycling air oversaturation with solvents. The
temperature from 30 С to 80 С is set according from primer type. As well as in painting booth, the transportation is made by chain conveyor with bearing elements. It guarantees minimal contact of
painted surface with conveyor surface, protecting the painted surface from damage.
7. Paint mist filtration
devices
This system has automatic
explosion-proof alarm function for paint mist concentration. Adopt advanced cardboard to filter paint mist, it is maintenance-free within one year, using activated carbon for adsorption of
harmful gases. After this system it will be in accordance with the air pollution emission standards. (Paint mist emission standard ≤ 120mg/M3, p-xylene: emissions concentrations ≤ 70mg/M3, the 15
meters height exhaust pipe allows the secondary emission rate is 1.0kg/h. )
Now the price of blasting primer line is
reasonable, if you have needs, please contact us.
As a shot blasting manufacturer, we will do our best to meet all the needs of customers.
If you want to know more kinds of blast pro shot
blaster, please visit our website.