Airless Shot Blasting - Tunnel Type

Airless Shot Blasting - Tunnel Type

The Airless Shot Blasting Machine – Tunnel Type is a continuous, high-production system designed for cleaning long or flat components such as plates, structures, pipes, beams, and sections. Components pass through a blasting chamber on conveyors while multiple blast wheel units ensure complete surface cleaning in a single pass.

This tunnel type shot blasting machine is ideal for fabrication industries requiring uninterrupted production, fast throughput, and reliable surface preparation before painting, coating, or further processing.

Available Configurations

  • Roller Conveyor Type
  • Belt / Conveyor Type
  • Diabolo Roller Type (for pipes / round jobs

*Advanced machine for cold forging, railway boogie work and shot pinning needs

Smart Process Overview

Working Principle

Components are loaded onto the inlet conveyor and moved into the blasting chamber. Inside the tunnel, multiple high-speed shot blasting turbine units positioned at optimized angles project abrasive media onto the component surfaces.

Continuous conveyor movement exposes the entire surface to the abrasive stream for complete cleaning. For pipes or round jobs, diabolo rollers rotate the component during blasting to ensure full circumferential coverage.

Used abrasive falls into the hopper and is recovered through screw conveyors, bucket elevator, and air wash separator for reuse. Dust and fine particles are extracted through the integrated dust collector system. Cleaned components exit through the outlet conveyor ready for the next process.

Built With Precision Components

Main Components

1

Blast Wheel Units

10 HP to 30 HP high-efficiency turbines arranged in multi-wheel configuration for complete blasting coverage.

2

Blasting Chamber (Tunnel)

Heavy-duty chamber with manganese steel liners and replaceable wear plates.

3

Conveyor System

Roller, chain, or diabolo roller conveyor systems with VFD-controlled speed.

4

Abrasive Circulation System

Includes longitudinal and cross screw conveyors, bucket elevator, and air wash separator.

5

Dust Collection System

Bag filter or cartridge type dust collector with pulse jet cleaning system.

6

Sealing System

Rubber curtains at entry and exit points to prevent abrasive leakage.

7

Electrical Control Panel

PLC-based system with safety interlocks and operational controls.

Why Choose Tunnel Type Machine

The Airless Shot Blasting Machine – Tunnel Type is ideal for continuous mass production where long and flat components require efficient blasting in a single pass. It offers high productivity, repeatable cleaning quality, and reliable automated handling.

Its easy integration with painting and coating lines makes it a preferred solution for modern fabrication plants.

Related Industries You May Like

Explore a wide range of industries where shot blasting plays a critical role in improving surface quality, durability, and production efficiency. From automotive and foundry to fabrication and heavy engineering, Jinil's solutions are designed to meet diverse application needs, ensuring reliable surface preparation, consistent finishing, and optimized performance across demanding industrial environments.

Complete Support Portfolio

Applications

The Airless Shot Blasting Machine – Tunnel Type is suitable for continuous blasting of long and structural components.

1

Shot blasting of plates and sheets

2

Cleaning of beams, channels, and angles

3

Surface preparation before painting

4

Pipe external cleaning

5

Rust and scale removal from structural parts

6

Pre-treatment before coating or galvanizing

Operational Performance Benefits

Advantages

The Airless Shot Blasting Machine – Tunnel Type offers several operational benefits.

  • Continuous high production system
  • Uniform surface finish in single pass
  • Suitable for long and heavy components
  • Reduced handling time
  • Easy integration with painting lines
  • Efficient abrasive recycling
  • Low operating cost per ton

Advanced Engineering Highlights

Design Features

Customization options are available based on production requirements.

  • Multi-stage blasting zones
  • Pre-heating or drying section integration
  • Automatic thickness detection system
  • Heavy-duty roller design for high loads
  • Pipe rotating synchronization system
  • Integration with primer coating line

Additional System Enhancements

Optional Features

  • Continuous production system
  • High throughput output
  • Uniform blasting quality
  • Suitable for heavy fabrication
  • Multi-wheel blasting arrangement
  • Conveyorized automatic operation

Optional Accessories

The machine can be upgraded with accessories based on production needs and application requirements.

PLC with HMI & SCADA Integration

Enables centralized control, real-time monitoring, and seamless automation for efficient and optimized blasting operations.


Variable Conveyor Speed (VFD)

Allows speed adjustment based on production requirements, ensuring consistent blasting quality and controlled processing time.


Automatic Loading and Unloading System

Automates material handling to reduce manual effort, improve safety, and enhance overall productivity.


Magnetic Separator for Abrasive Cleaning

Separates contaminants from reusable abrasive media to maintain consistent performance and extend media life.


Abrasive Level Sensor

Monitors abrasive levels continuously to ensure uninterrupted blasting and stable operational performance.


Auto Abrasive Replenishment System

Maintains optimal abrasive levels automatically, minimizing downtime and ensuring continuous efficiency.


Dust Collector with Spark Arrestor

Ensures a clean environment while preventing sparks from entering the system for improved operational safety.


Air Blow-Off System

Removes residual dust and abrasive from components after blasting for a clean and ready surface.


Auto Shot Flow Control Valves

Regulates abrasive flow automatically to maintain consistent blasting intensity and optimize media consumption.


Soundproof Enclosure

Reduces operational noise levels, improving workplace safety and ensuring compliance with noise standards.


Conveyor Synchronization with the Painting Line

Integrates blasting with coating processes to enable smooth, continuous production flow and improved efficiency.


Frequently Asked Questions

Clear answers to common questions about Jinil's shot blasting machines, surface preparation solutions, and engineering support—helping you make informed decisions with confidence.
1. What is an Airless Shot Blasting Machine – Tunnel Type? +

It is a continuous conveyorized blasting machine used for cleaning plates, beams, pipes, sections, and structural components.

2. What components are suitable for this machine? +

Plates, sheets, beams, channels, angles, pipes, structures, and long fabricated components are ideal for this machine.

3. What is the advantage of a tunnel type machine? +

A tunnel type shot blasting machine provides continuous production, faster throughput, and uniform blasting quality in a single pass.

4. Can pipes be blasted in this machine? +

Yes, machines fitted with diabolo rollers are designed for rotating and blasting pipes or round jobs.

5. Which abrasives can be used in this machine? +

Common abrasives include steel shot, steel grit, and other suitable industrial blasting media.

6. Which industries use tunnel type machines? +

Steel fabrication, shipbuilding, oil & gas, wind energy, construction, railways, and heavy engineering industries use these systems.

7. Does the machine recycle abrasive media? +

Yes, it includes screw conveyors, bucket elevator, and separator systems for continuous abrasive recovery and reuse.

8. Can the machine be customized? +

Yes, options such as SCADA controls, heavy-duty rollers, automatic loading systems, soundproofing, and coating line integration are available.