Shot Blasting Plants

The stringent quality specifications of international standards calls for a thorough removal of mill scale, forged scales, rust and casting residue.

Forged scales, rust and casting residue. The durability and the quality of painting depends mainly on the surface preparation and the shot Blasting is the only way of thorough removal of scales, rust etc. , at the lowest cost. Shot Blasting improves the surface finish, increase paint life and lustre, increases tool life of drills, punches etc. Also increases welding quality and speeds up the welding.

The modern quality conscious companies right from corporate giants to small industries are adding shots Blasting Systems to get an edge over the competitors.

Let it be a forging, a casting, a steel plate, a structural item, an LPG Cylinder, a mill roll, a tube, a fabricated item, a railway wagon, a coiled HR strip (for cold rolling steel plate, a structural item, an LPG Cylinder, a mill roll, a tube, a fabricated item, a railway wagon, a coiled HR strip (for cold rolling steel mill) or even a delicate nonferrous item. REDDSON has an answer for surface cleaning with a wide range of shot Blasting Machines in Airless Roto Blast models and Pneumatic Blast rooms & Cabinets.

Shot blasting plant

Conveyorized Cylinder Roto Blast Machines :

These machines are suitable for Shot Blasting of Cylinders CNG, LPG, Oxygen, Acetelene, Ammonia, Nitrogen etc, Pipes and other Cylindrical items. The Cylinders/ pipes enter from one end come out fully shot blasted from the other. The cylinder conveying system consists of a unique skew design to rotate and move the cylinder/ pipes linearly on the conveyor. The automatic, save loading & unloading.

Conveyorised Roll Blasting Machines :

The machines are suitable for Shot Blasting of Steel Mill Rolls of HC HC after Grinding to obtain mat finish on the cold rolled sheets. In design these machines are similar to cylinder Roto Blast Machines except the skew conveyor design is robust to carry loads upto 5/6 Tonnes. The mill rolls are moved on the skew conveyor to obtain mat finish on the cylindrical surface. There are no moving parts, bearings, inside the Blast Chamber except the wear resistant rolls.

Conveyorised Plate Roto Blast Machines :

Heavy Plates upto 100mm thickness, 3 metre Width and unlimited length are Shot Blasted The plates enter the machine from one side vertically, gets shot blasted on both sides, and comes out perfectly Shot blasted with a silver grey finish. Shot Blasting of huge fabrications, Railway bogies, Turbine bodies, Ship building items etc is a very difficult task and is never done perfectly since the internal surfaces can never be reached for cleaning. The only solution is Shot Blasting & Steel plates prior to fabrication.

Strip Descaling Machines :

The low carbon hot rolled steel strips are shot blasted in the strip descaling machines to remove the mill scale/ rust prior to cold rolling. These machines can totally eliminate acid pickling plant and or assist acid pickling plant in the existing set ups to increase the speeds. The Shot Blasting of HR Steel Strips is a dry-descaling process with the airless roto blast principle. Any number of Roto Blasts can be provided to achieve desired speed and finish of HR Strips. The machines are totally automatic.

Specifications/ Model Swing Table Roto Blast Strip Descaling Roto Blast Conveyorised Roll Roto Blast Conveyorised Plate Roto Blast Conveyorised Cylinder Roto Blast Spin Hanger Roto Blast Tumble Roto Blast Shot Peening Machine
ST - 1200 ST - 1800 ST - 2000 SP - 4000 SP - 6000 CR - 1000 CR - 2000 CP - 8000 CC - 1000 CC - 2000 SH 10 X 8 SB 13 X 15 SB 16 X 22 RMR 200 TMR 400 TMR 600 TMR 800
Job specifications
Batch Max Dia x height in mm Weight Kgs. 1220 X 1000
1200		 1830 X 1200
1500		 2030 X 1200
2000		 - - - - - - - 1000 X 800
5000		 1300 X 2200
10000		 1600 X 2200
15000		 200 400 600 800 -
Plate/ Strip
Thickness x Width (Length unlimited) - - - 6 X 650 6 X 800 - - 100 X 3000 mm - - - - - - - - - -
Cylinder/ Pipe
Dia mm x (Length mm unlimited) - - - - - - - - 400 400 - - - - - - - -
Roll
Dia mm x Length mm x Weight in Kgs. - - - - - 400 X 2000
X 3000		 400 X 2500
X 6000		 - - - - - - - - - - -
Table Dia 1220 1830 2030 - - - - - - - - - - - - - - -
Conveyor/ Job Speed metres/ min. - - - upto 40 Upto 50 1 1 0.8 to 1 1.5 5 - - - - - - - 1 to 2
No. of Roto Blasts
Roto Wheel Size mm. 1 1 2 4 6 1 2 8 1 2 1 2 3 1 1 1 1 1
Abrasive Flow Kg/ min. 500 500 500 500 500 500 500 500 500 500 500 500 500 400 500 500 500 500
No. of Elevators 180 240 240 360 360 240 240 240 240 240 160 240 240 60 180 240 360 260
Dust Collector 1 1 1 2 2 1 1 4 1 1 1 1 1 1 1 1 1 1
Filter Bag Type. 1 1 1 2 2 1 1 2 1 1 1 1 1 1 1 1 1 1
Motors
Roto Blasts HP x Quantity 15 X 1 20 X 1 20 X 2 30 X 4 30 X 6 20 X 1 20 X 2 20 X 8 20 X 1 20 X 2 15 X 1 20 X 2 20 X 3 7.5 X 1 15 X 1 20 X 1 30 X 1 15 X 1
Elevators HP x Quamtity 2 X 1 3 X 1 5 X 1 5 X 2 7.5 X 2 2 X 1 5 X 1 5 X 4 2 X 1 5 X 1 2 X 1 5 X 1 7.5 X 1 1.5 X 1 2 X 1 2 X 1 3 X 1 2 X 1
Swing Table HP x Quantity 1 X 1 1 X 1 2 X 1 - - - - - - - - - - - - - - -
Screw Conveyor HP x Quantity - 2 X 1 2 X 1 3 X 2 5 X 2 2 X 1 3 X 1 3 X 4 2 X 1 2 X 1 - - - - - - - -
Roll/ Skew Conveyor HP x Quantity - - - - - 3 X 1 3 X 1 - 2 X 1 2 X 1 3 X 1 3 X 1 3 X 1 - 7.5 X 1 7.5 X 1 10 X 1 -
Dust Collector Fan x Quantity 7.5 X 1 10 X 1 15 X 1 15 X 1 15 X 1 7.5 X 1 10 X 1 15 X 2 7.5 X 1 10 X 1 7.5 X 1 10 X 1 15 X 1 7.5 X 1 7.5  X 1 7.5 X 1 10 X 1 7.5 X 1
Shaker HP x Quantity 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1 1 X 1
Blow off fan HP x Quantity - - - 15 X 1 15 X 1 - - 15 X 1 - - - - - - - - - -
Spin HP x Quantity - - - - - - - - - - 2 X 1 2 X 1 2 X 1 - - - -

Swing Table Roto Blast Machines :

The Machines are ideally suited for Forgings Castings, Misc., Fabricated items for batch production with a mix of large & small Items. These machines are available in various swing table diameters. 1200 Dia, 1800 Dia, 2000 Dia for respective Batch loads of 1000 Kgs. 1500 Kgs and 2000 Kgs. The components are spread on the table and when door is closed along with table, the shot blasting process starts for the batch production. Another table can be provided, so that loading/unloading can take place simultaneously.

Spin Hanger Roto Blast Machines :

The design consists of over head conveyor which transfers the components into the Blast Chamber. The conveyor hanger rotates the components-either a single piece weighing upto 15 Tons or a batch of components hanging on a hook-with a power drive. The roto Blasts are mounted sideways. Two conveyor tracks can be provided For blasting and loading & unloading components simultaneously.

Tumble Roto Blast Machines :

The machine is suitable for Shot Blasting for smaller components with a high output.
The components tumble in the trough of the conveyor and gets shot blasted thoroughly all-round.

Conveyorised Plate Blasting Machines :

The machines are designed for Shot Blasting of plates upto 100 mm thickness, 3000 mm width and unlimited length and structural items in one pass.

Shot Peening Machine :

Shot Peening is done to remove internal stresses and increase the fatigue strength of the components. The machines are suitable for leaf springs, drill Rods, coil springs, axles, gears connecting rods, crank shafts etc. The machine is conveyorized and is automatic.

Pneumatic Blast Rooms :

Pneumatic Blast Room is suitable for shot Blasting of huge fabricated items, castings etc. Where the size of the item is too big. It consists a blast room which is totally enclosed and provided with proper ventilation and lighting. The operator shot blasts the required surfaces with pneumatic blast nozzle (compressed air and steel shots).

The machines include automatic recycling system of shots screw conveyor & bucket elevator, dust collector, doors, lighting etc.

The compressed air requirement Would be 5.7 metrs/ min (230 CFM) for each 10mm nozzle and 3.5 metrs/ min (125 CFM) for each 8mm nozzle at air pressure of 5kg/ cm' (75 PSI). The surface cleaning rate would be approximately 12 sq. Metrs/ hour for each 10mm nozzle and 9sq. Metrs/ hour for each 8mm nozzle. The components can be loaded on trolley which moves in and out of the blast room with mechanised winch. Size of the blast room can be decided depending upon maximum size of the jobs.

Pneumatic Blast Cabinets :

The machines are suitable for Shot Blasting of delicate items, nonferrous items, small batch quantities like tool room applications, die cast parts, small forging & castings.

Specifications/ Model PC 800 PC 900 PC 1000
Working chamber
Height 800 mm 900 mm 1000 mm
Width 900 mm 1200 mm 1500 mm
Depth 800 mm 1100 mm 1400 mm
Blast Nozzle size 5 mm 5 mm 5 mm
Compressed Air Requirement 1.1 metre³/ min (40 CFM) 1.1 metre³/ min (40 CFM) 1.1 metre³/ min (40 CFM)
Dust Collector Fan 2 HP 2 HP 3 HP
Abrasive Storage Capacity 40 Litres 40 Litres 40 Litres

Reddson manufactures various types of Airless Roto Blast Models and Pneumatic Blast Room & Cabinet for various applications.

AIRLESS ROTO BLAST :
The Airless Roto Blast Shot Blasting Machines consists of

  1. Blast Chamber : The blast chamber is a steel plate fabricated structure with heavy duty construction reinforced by structural members. The cabinet inner walls are provided with Rubber Lining. Blast zones are provided with wear resistant liners. 11 to 14% Austentic Manganese lining can also be provided with suitable safety interlocking.

  2. Roto Blast : The roto blast unit consists of housing, bearing unit, wear resistant replaceable liners, blades etc. The Blast Wheels are equipped with eight blades for optimum efficiency. The Blast Wheel design consists of replaceable wear resistant impellor and control cage for easy external adjustment of Blast angles.

  3. Elevator : Bucket Elevators are provided for abrasive transfer from boot section to the hopper. An independent heavy duty drive is provided.

  4. Dust Collector : Each machine is provided with filter cloth bag/ pulse jet filter, dust collector with suitable dust exhaust fans.

  5. Screw Conveyor : Screw Conveyors are provided in the Blast Chamber to transfer the spent abrasive to the elevator boot section.

  6. Skew Conveyor : These are unique type which rotate and transfer the job on the conveyor rolls.

  7. Job conveyors : Chain driven Roller conveyors are provided for moving of plates.

S.No. Model Application
1 Swing Table Machines Forgings, Castings, Fabricated Items for batch production.
2 Conveyorised Cylinder
Blasting Machines		 Cylinders LPG, CNG, Oxygen, Acetelene, Ammonia, PIPES and other cylindrical items.
3 Conveyorised Plate
Blasting Machines		 Steel Plates upto 100mm thick x 3 metres.
Width and unlimited length & Structural items.
For heavy fabrication industry.
4 Conveyorised Roll
Blasting Machines		 Steel mill rolls for obtaining matte finish.
5 Strip Descaling
Machines		 HR Coiled Strips for Cold Rolling Mills for eliminating/ assisting acid wash, Suitable for new and existing plants.
6 Spin Hanger Machines For Heavy Castings/ Forgings and other Misc.
Parts for weights upto 15 Tons single/ batch weight.
7 Tumble Blast Machines For small components-casting/ forgings for batch production.
8 Shot Peening Machines For leaf springs, drill rods etc.