Roller Conveyor Shot Blast Machine Type X
Construction Blaster

Roller Conveyor Shot Blast Machine Type X Construction Blaster

Delivery:

18 weeks +

Technology:

Wheelblast

Application:

Rust and Heat Scale Removal

Industry:

Medium/Heavy

Process:

Continuous

Key Benefits

Extremely good blasting properties especially for complex formed parts

Easy adaption of blast pattern for customer workpieces

Easy Maintenance

Long lifetime of the installed components

Features

  • Inclined wheels
  • Various numbers of wheels possible
  • Workpiece recognition
  • Proven roto-jet® double disc blast wheels
  • Automatic PLC control
  • Can even be used as a “Universal Blasting Machine” for sheet metal, profiles and welded constructions

Applications

Removal of scale and rust

Roller Conveyor Shot Blast Machine

Construction Blaster Type X roller conveyors differentiate themselves from the Type G and Type HD roller conveyors by the shot blast wheels being installed at an angle to the direction of movement through the machine.

The angled positioning of the shot blast wheels ensures that the blasting operation is perfect, especially on parts such as welded constructions, flame cut parts or other complex formed prefabricated parts with base ends.

The smaller machines deliver excellent results for smaller construction parts and especially flame cut parts, even with just 4 angled shot blast wheels. The bigger machines are fitted fundamentally with a minimum of 8 wheels and up to a maximum of 16 wheels.

The construction blaster roller conveyor is generally used to blast welded constructions that have been manufactured out of preblasted materials. By adding an optionally available abrasive removal station the construction blaster can be used as a “Universal Blasting Machine” for sheet metal, profiles and welded constructions. 

Cartridge Filter Unit

During the workpiece blasting process, rust and scale, along with broken down media dust (or fines) will start to develop. The fines are separated in the abrasive cleaner, which is adjustable to the different types and sizes of blast media. The cartridge filter that produces the necessary pressure is fitted on top of the machines for the RB 600, RB 1000 and RB 1500 and it is situated next to the blasting machine for the bigger machines from RB 2000 upwards.

The impact separator within the cartridge filter unit not only ensures that the broken down fines are separated (which protects the filter cartridge against unnecessary wear) but it is also certified as a spark extinguishing device and is one of the elements that contributes towards fulfilment of ATEX regulations. The cartridge filters clean the cartridge automatically using an air pressure pulse. The intensity and duration of the pulse can be adjusted according to the type and amount of dust. All the cartridge filter processes are performed without ignition.

Loading and Unloading

In standard format, the roller conveyor inlets and outlets are powered by the central drive of the blasting machine. To increase the efficiency they can be fitted with a separate drive unit. The affiliated frequency converter is automatically synchronised.

If bowed workpieces are being blasted that cannot be cleaned properly by the brush and blow stations, then a longer collection track with a reclamation conveyor is recommended to help ensure that the blast media goes back into the machine.

Through the installation of a cross feeding system, many efficiencies can be achieved. Also with a cross feeding system incorporated, the blasting machine can be integrated into a sawmill/bore production line.

Abrasive Blast Media

For most roller conveyor installations the blast media would normally be round (cast or rounded cut wire shot). The blast media travels around the machine in a circle and is continually cleaned of contamination.

For a good blasting result a balanced mix of new and used blast media is imperative. The finer used media in this mixture is important for equal coverage of the surface being blasted and the coarser media is important to break up any scale.

The use of the correct media is of particular importance for the blasting process to ensure a good blasting result. 

The following is a useful guide:

  • For coarse workpieces (e.g. heavy plate profiles) a coarse abrasive media mix (steel ball shot size S390 and over)
  • Delicate workpieces (e.g. thin metal plates) a fine abrasive media mix (steel ball shot size S330 and below)

Shot Blast Cabinet

As with all Wheelabrator roller conveyors the shot blasting cabinet is manufactured completely from manganese. Manganese has a property which is hard enough to deal with the shot blasting from 35HRC to more than 50HRC.

Therefore manganese has extremely good blasting properties. In the hot spot area of the blasting cabinet, additional 10mm thick manganese plates are added. They are attached from the outside and are easy to replace. When aggressive shot is used, additional lining of manganese-, tool steel or cast material can be provided.

To avoid shot leakage, several rubber layers or Vulkolancurtains are fitted in areas of heavy wear. These are mounted in a V-Track and are easy to replace.

Abrasive Removal Unit

After the blasting process, the workpiece may still be covered in blast media, which must be cleaned off. This task is carried out by a rotating brush, which is fitted with securely attached brush segments, which are interchangeable.

To avoid blast media building up on long parts, the rotation brushes flick the spent abrasive from the work surface into a specially designed trough which has a screw conveyor taking the media back into circulation. To keep the position between the brushes and the screw conveyor constant when blasting different sized work pieces, both are built with the same adjustable framework. The framework can be adjusted manually or automatically in intervals of less than 5mm at each required height. Finally any remaining media on the work pieces will be removed by the blow off station, which is mounted on the same framework and uses high pressure ventilators to blow off any media remaining.

Technical Specifications

Type RB 7.5/2.5X RB 7.5/5X RB 15/5X RB 15/10X RB 20/15X RB 25/15X RB 30/15X RB 30/20X
Machine entrance width (mm) 850 850 1600 1600 2100 2600 3100 3100
Machine entrance height (mm) 300 550 550 1050 1550 1300 1600 2100
Work speed (m/min) 0.5-2 0.5-2 0.5-2 0.5-2 0.5-2
0.5-2 0.5-2  0.5-2 
Number of blast wheels 4 4 4 4 8 8 8 16
Power per blast wheel (kW) 4 4 11 11 11 11 11 11
Optional (wheel x kW)
  8x11 8x15 8x15 8x15 8x15/10x11  
Roller pitch (mm) 800 800 800 800 750 750 750  
Alternative pitch (mm) 400 400 400 400 500/1000 500/1000 500/1000 -/1000