Recently, a roller conveyor shot blasting machine customized for an Indian client was successfully installed, commissioned, and officially put into production. The successful delivery of this equipment marks a further expansion of our company in the South Asian market and provides strong support for improving the surface treatment capabilities of the local steel processing industry.
This client is a local Indian company specializing in bar and tube processing. Its main products include round steel, rebar, square steel, round tubes, and square tubes, widely used in construction, machinery manufacturing, and petrochemical industries. With the rapid development of India's infrastructure construction and manufacturing industry, the client has placed higher demands on the quality and efficiency of bar and tube surface treatment.
Before introducing a specific case, let's briefly explain the applicable workpiece range of roller conveyor shot blasting machines to help understand why the client chose this model.
Roller conveyor shot blasting machines use a continuous roller conveyor system. The workpiece passes through the shot blasting chamber at a uniform speed, receiving shot from multiple shot blasters at different angles. This continuous pass-through operation method is particularly suitable for the surface treatment of the following types of workpieces:
**Round Steel and Rebar** Bar stock commonly used in construction and machinery manufacturing. Roller-type shot blasting machines can continuously clean the outer surface of round steel and rebar, removing oxide scale and rust.
**Square Steel and Flat Steel** Suitable for various structural components and mechanical parts. Shot blasting removes surface oxide scale, providing a clean surface for subsequent processing.
**Round Tubes and Square Tubes** Widely used in fluid transportation and structural support. Steel pipes typically rotate simultaneously while being conveyed on roller conveyors, ensuring uniform shot coverage on the outer wall.
**Welded Pipes and Seamless Pipes** Various steel pipes require surface cleaning before anti-corrosion coating; shot blasting provides a good base for coating adhesion.
The customer's original surface treatment method combined manual grinding and pickling, which presented the following problems in actual use:
**Low Efficiency** Manual grinding is slow and cannot meet the needs of large-scale production, becoming a bottleneck in production capacity.
**Unstable Quality** Manual operation is affected by personnel skills, resulting in significant variations in cleaning effects and poor batch-to-batch consistency.
**Environmental Pressure** High costs of pickling wastewater treatment and significant environmental pressure, failing to comply with increasingly stringent local environmental regulations.
**High Operating Costs** Rising labor and pickling agent costs keep unit processing costs high.
The customer desires a new equipment that enables continuous, automated, and environmentally friendly surface treatment of bars and tubes.
Our technical team customized a roller conveyor shot blasting machine for the customer based on workpiece specifications and production requirements. The main configurations are as follows:
**Roller Conveyor System** Utilizing a variable frequency speed control roller conveyor, the conveying speed can be adjusted according to the specifications of the bars and tubes and cleaning requirements. The lengths of the input and output roller conveyors are customized according to the customer's site layout, enabling automatic feeding and discharging.
**Multiple Shot Blasting Unit Layout** Multiple high-efficiency shot blasters are positioned at different locations within the shot blasting chamber, projecting shot at workpieces from above and sides at multiple angles, ensuring uniform impact on all surfaces of workpieces with different cross-sections, such as round steel, threaded steel, square steel, and round pipes.
**Steel Pipe Rotation Device** For pipe cleaning, a rotation device ensures the steel pipe rotates at a constant speed during its journey, guaranteeing uniform shot coverage on the outer wall.
**Shot Circulation System** Equipped with a screw conveyor, bucket elevator, and high-efficiency separator, it enables automatic shot recovery, screening, and recycling, reducing abrasive consumption.
**High-Efficiency Dust Removal System** Equipped with a high-efficiency cartridge dust collector, the airflow is matched to the shot blasting chamber volume, ensuring dust emission concentrations meet local Indian environmental standards.
**PLC Control System** Enables one-button start, automatic operation, and fault alarm functions; easy to operate; and can store multiple sets of process parameters.
After the equipment was put into operation, the surface treatment efficiency of the customer's bars and pipes significantly improved. The continuous roller conveyor system enables continuous batch operations, significantly increasing production capacity compared to traditional methods. Cleaning results are stable with good batch-to-batch consistency.
Manual grinding and pickling have been completely replaced, resulting in substantial reductions in labor and pickling agent costs, and a significant decrease in unit processing costs.
The client's production manager stated, "This customized roller conveyor shot blasting machine has helped us solve long-standing efficiency and quality issues. The processing speed for bars and tubes is now much faster than before, and the cleaning effect is very stable. Customer satisfaction with product surface quality has significantly improved."
This delivered customized roller conveyor shot blasting machine, through its continuous roller conveyor system, multi-blaster layout, steel pipe rotation device, and PLC automatic control, helped the client upgrade their process from manual grinding and pickling to automated shot blasting, improving efficiency, reducing costs, and enhancing environmental performance.
This case further validates the core value of roller conveyor shot blasting machines in the field of bar and tube surface treatment. Our company will continue to monitor the equipment's operation and provide timely technical support and after-sales guarantee.
A: Roller conveyor shot blasting machines are suitable for cleaning round steel, rebar, square steel, flat steel, round tubes, square tubes, welded tubes, seamless tubes, and other bars and tubes, as well as long steel products such as steel plates, H-beams, and I-beams. There is no limit to the length of the workpiece, but the cross-sectional dimensions must be within the range of the shot blasting chamber channel dimensions.
A: Roller conveyor shot blasting machines can handle a wide range of bar and tube diameters, from small to large. The specific diameter range needs to be customized according to customer requirements and can be confirmed with our technical team during the selection process.
**A:** Roller conveyor shot blasting machines are equipped with a steel pipe rotation device, ensuring the steel pipe rotates at a uniform speed during travel, guaranteeing even shot blasting on all surfaces of the outer wall, eliminating blind spots.
**A:** Roller conveyor shot blasting machines typically require a pit for installing a shot recovery system. The pit depth is generally 800 to 1200 mm. If a pit cannot be dug on site, a surface-mounted recovery solution can be designed; please confirm with our technical team during the selection process.
**A:** After cleaning with a roller conveyor shot blasting machine, the oxide scale and rust on the workpiece surface are completely removed, exhibiting a uniform metallic luster. The cleanliness level can reach Sa2.5 standard, providing a good adhesion base for subsequent coating.
**A:** Yes. The conveyor speed uses frequency conversion speed regulation, which can be flexibly adjusted according to the workpiece type and cleaning requirements. Slower speeds result in more thorough cleaning, while faster speeds lead to higher throughput.
A: Yes. Our company can customize the shot blasting chamber channel size, the number and configuration of shot blasters, the conveyor speed range, and the control system functions according to workpiece specifications, production requirements, and site conditions.
For more information on the technical parameters or customization options for roller conveyor shot blasting machines, please contact our technical team.
