TUNNEL TYPE

Tunnel Type A range of airless shot blasting machine, 'tunnel type' with number of blast wheels varies according to the production output available. This is the most used and flourishing series for the long structural, channels, angles, plates, gratings, pipes etc. for large production output in terms of surface treatment. The opening of the tunnel and number of blast wheels, depend upon the structure of the job for attaining homogeneous finish.

Major part of the machine includes blast wheels for giving high production output, roller conveyor for job conveying and media recovery consists of bucket elevator, screw conveyors, rotary screen separators etc. and pulse jet type dust collectors. The airless shot blasting machine tunnel type has unearthed major applications in cleaning the long structures like angles, channels, beams and flat structures like plate, gratings etc. to obtain the finish SA2.5.

Essential Elements

• Construction of the working chamber: The heavy duty all welded cabinets is manufactured out of prime quality heavy duty steel plate and mounted on sturdy and rigid structural steel frame work. Manganese steel liners are fitted in direct and indirect blast zones of the cabinet (complete lining).
• Blast Wheel Assembly: The rotor is made out of EN grade material duly hardened. The drive system of blast wheels (rotor) entails a set of self-lubricated and self-aligning pedestal bearings. The rotor is dynamically balanced.
• Abrasive circulation system for continuous and trouble-free operation.
• Pulse jet type dust collection system: Dust collectors are provided to suck the dust from the blasting cabinet. The filter bags of dust collectors are made out of non-woven PTEE pleated bags for low dust emission level.
• A roller conveyor is provided at the inlet and outlet of blasting cabinets driven by suitable variable AC drive.