Roller Conveyor Shot Blast Machine Type G

Roller Conveyor Shot Blast Machine Type G

Delivery:

12 to 18 weeks

Technology:

Wheelblast

Application:

Cleaning, Corrosion Removal, Paint Stripping, Rust and Heat Scale Removal

Industry:

Medium/Heavy

Process:

In-line

Key Benefits

A variety of roller conveyors for different uses and work speeds is available

For the treatment of metal plates or profiles in the steel construction or steel preparation industries

As standalone units or integrated into an automatic transportation or sawmill/bore line

Features

Roller conveyors are predominantly used to clean metal plates and profiles in a continuous through feed process.

Applications

  • Cleaning
  • Corrosion removal
  • Paint Stripping
  • Rust and Heat Scale Removal 

Shot Blast Machine

Roller conveyors are predominantly used to clean metal plates and profiles in a continuous through feed process.

Wheelabrator offers a variety of roller conveyors for different uses and work speeds. The Type G range is mainly designed for the treatment of metal plates or profiles in the steel construction or steel preparation industries. The machines can be delivered as standalone units or integrated into an automatic transportation or sawmill/bore line.

Type G range

The Type G range is offered with through feed widths from 600mm to 3000mm. The blasting wheels are positioned vertically to the flow direction of the roller conveyor.

RB 600, RB 1000 and RB 1500 are fitted with 4 shot blast wheels. The RB 2000 can be fitted with either 4 or 6 wheels. The bigger machines, RB 2500 and RB 3000, can be fitted with either 6 or 8 shot blast wheels. The 6 wheel version is used for treating plates or smaller profiles, whereas the 8 wheel version is mainly recommended for blasting profiles.

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.

Roller Conveyor Type G Animation

Watch the animation here

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)

TITAN Wheel

The blast wheel is the heart of the blasting machine, as the choice of blast wheel determines the power output and the economics. 

This machine is fitted with TITAN shot blast wheels as standard. The TITAN wheel offers excellent blasting performance and unbeatable service life for the main blast components, which are made from hardened tool steel.

The TITAN offers even more wall strength through its wear lining, which creates an airtight and completely insulated housing as well as easing maintenance and repairs. There is a full range of variations and sizes available to ensure the chosen wheel is specific to the job in hand.

 

Technical Specifications

Type RB 600G RB 1000G RB 1500G RB 2000G RB 2500G RB 3000G
Machine entrance width (mm) 700 1100 1600 2200 2600 3300
Machine entrance height (mm) 550 550 550 550 550 550
Work speed (m/min) 1.0-2.3 1.4-2.4 1.0-2.3 0.8-2.5 1.0-3.0 0.8-2.5
Number of blast wheels 4 4 4 4/6 6/8 6/8
Power per blast wheel (kW) 5.5/7.5 11 11/15 11/15 11/15/18.5 11/15/18.5
Roller pitch (mm) 800 650 650 800 800 800
Alternative pitch (mm) 400 400 400 400 400 400