Shot Blasting and Primer Painting Machine Revolutionize Your Workflow!

By Mathew Lee| Updated: March 24, 2024

Are you tired of the tedious and time-consuming process of preparing surfaces for painting or coating? Say hello to a game-changer in surface treatment technology: our automated shot blasting line.


1. What Is Shot Blasting and Primer Painting Line?

Shot Blasting and Primer Painting Lines are primarily employed for safeguarding steel products against corrosion. These preservation lines integrate heating (drying), blasting, coating, and drying processes for various workpieces like sheet steel, profiles, pipes, or steel structures within a single automated line.

They prove particularly advantageous when there’s a considerable gap between the blasting and final coating stages during manufacturing or storage. To prevent rust reformation, a weld primer is applied, offering corrosion resistance for several weeks.

These lines can accommodate sheet widths of up to 5000mm, with passage speeds ranging from 1.0m/min to 8.0m/min.

auto blasting and priming machine
shot blasting and priming machine
auto shot blasting line

2. Features

  • Complete systems quoted
  • One supplier for all components
  • Proven abilities – The industry leader
  • Quality components
  • Proven technology
  • Custom designs – Flexible layouts
  • Simple integration into existing manufacturing processes
  • Wide range of system sizes and variants

3. Applications

For the treatment of plates, beams, and profiles in the steel manufacturing, construction, and processing industry.

  • Removal of mill and forge scale and rust
  • Increase of surface roughness
  • Corrosion removal
  • Rust and heat scale removal
shot blasting and priming plant
shot blasting and primer coating machines
preservation line

4. Key to Fully Automated Preservation Line

automated shot blasting and priming machine blastking
  1. Cross transfer conveyor
  2. Inlet roller conveyor
  3. Pre-heater
  4. Roller conveyor shot blast machine
  5. Blast machine filter
  6. Paint spray chamber
  7. Paint chamber filter
  8. Slat conveyor
  9. Heating system
  10. Drying chamber
  11. Cross transfer conveyor
  12. Outlet roller table

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5. Key Benefits

Continuous blasting

Highly efficient blast wheels

Quick turnaround, easy assembly and commissioning

Easy to integrate into the production line

6. The Shot Blasting and Painting Line Working Process

The shot blasting and painting line follows a specific working process. Initially, the workpieces are conveyed along the inlet roller conveyor into the shot blasting chamber. Once shot blasting is complete, the workpieces proceed into the clean chamber where they undergo cleaning to remove blasting media and contaminants using brushes, a reclaim screw conveyor, and a high-pressure fan.

After the cleaning process, a coating is applied in the spray chamber, and the finished workpieces are then transported into the drying chamber. A slat conveyor facilitates the movement of the parts towards the outlet roller table. At this stage, they are either removed from the line or fed into a downstream logistics system via the cross-transfer conveyor.

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steel plate shot blasting and primer coating machine

6.1 Transport Systems

Transport systems for industrial applications encompass various types of conveyors and handling equipment tailored to specific needs. Examples include roller conveyors, chain conveyors (slat conveyors), conveyors dedicated to the painting section, cross conveyors known as “lift and go” systems, fork conveyors, shuttle conveyors, drives, and controls designed for automatic conveyor lines. Additionally, there are parts turning and collecting systems tailored specifically for welding constructions and tubes.

6.2 Shot blast systems

The roller conveyor shot blast systems play a crucial role in the complete shot blasting and primer coating line. Components such as large steel sheets, tubes, round bars, angle bars, and I-beams are transported on a roller conveyor through several stages including the pre-heater chamber, blast chamber, and a blow-off/brush-off station.

Mounted onto the machine housing, the high-performance blast wheels ensure thorough and consistent blast coverage of the parts. This process optimally prepares the surface of the parts for the subsequent primer coating, ensuring effective corrosion protection and enhancing the overall quality of the finished products.

steel plate shot blasting and primer painting machine
beam shot blasting and spray painting line

6.3 Paint Spray Chamber

The paint spray chamber automatically identifies the various plate and profile widths, applying a continuous coating process with a weld-primer thickness ranging from approximately 15 to 25 micrometers (μm).

To address environmental concerns, paint dust and solvents (if non-water-based paint is utilized) undergo treatment in accordance with local regulations. This treatment typically involves passing them through an automatic filter unit and a paint mist treatment plant.

6.4 Drying chamber & slat conveyor

In this area, the preserved steel plates and profiles undergo continuous drying. Workpieces are conveyed through the drying chamber using a slat conveyor. To minimize contamination from overspray, there is a considerable distance between the spray zone and the slat conveyor. Additionally, an elevating roller is strategically positioned upstream to address height discrepancies and ensure smooth transfer of thin plates onto the conveyor cross slats, thus preventing bending. The plates are supported only by the contact points of the conveyor cross slats, minimizing contact with the workpiece and preserving the wet primer.

The length of the drying chamber varies based on factors such as the type of paint, coating thickness, and passage speed.

steel plate shot blasting and primer coating line

7. Working Video

8. Conclusion

The protection of sheet metal and profiles with a thin layer of primer during storage and processing, followed by the application of primer before the final paint coating. The process, which involves cleaning rusted surfaces in an automated roller conveyor shot blasting machine and applying primer in an automatic painting chamber, is automated, enabling cost-effective results for large quantities with quality protection. Generally, the line comprises a hydraulic loading device, longitudinal roller conveyor, moisture drying chamber, through-feed cleaning machine, machine dust filter, primer painting chamber with cross painting robots, slat conveyor, and hydraulic unloading device. Depending on technological needs, the line can be integrated into other lines combining operations such as straightening, cutting, welding, final painting, etc. Proper selection of primer allows for subsequent welding and extended material storage.

auto shot blasting and primer painting line for beams1

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