Overhead Rail
Shot Blast Machine

Overhead Rail Shot Blast Machines

Delivery:

12 to 18 weeks

Technology:

Wheelblast

Application:

Cleaning, Deburring, Rust and Heat Scale Removal, Shot Peening

Industry:

Light/ Medium

Process:

Batch

Key Benefits

Features

  • Versatile transport technology
  • Highly efficient blast wheels
  • Multiple machine sizes and variations available

Applications

  • Blast cleaning welded steel fabrications
  • Deburring and homogenising diecast parts
  • Peening dynamically stressed components
  • Removal of mill and forge scale as well as rust
  • Removal of burrs and scales
  • Increase of surface roughness
  • Shot peening to increase fatigue strength

Reduced Cycle Times and
Cost Per Part

Wheelabrator overhead rail shot blast machines can be used for a wide spectrum of applications and workpiece shapes and sizes. Batches of small components or singular large, heavy workpieces can be treated.

The Process

The workpieces are transported manually on rotating hooks or automatically on an overhead rail system into the blast cabinet. The blast cycle runs in accordance with the preset programme and blast time.

This Flexibility is Achieved by Several Special Features

Blast Wheels

TITAN blast wheels provide a very efficient abrasive pre-acceleration, which allows for short treatment times, high performance and a superior blast process.

 

 

Rotation and Oscillation

To achieve complete coverage, the workpiece carrying hooks rotate and stop automatically at three different points in the blast cabinet. This rotation and oscillation process means that even highly complex workpieces, with hard to reach surfaces, can be safely and accurately treated. (See picture of rotation and oscillation on the right).

Hook and Hoist Options

The transport system can be designed for different weights. As an option, carrying hooks are available with integrated chain hoists for operational ease and safety.

Overhead Rail
Shot Blast Machine
Animation

Watch the Animation here

Special Features and Options

Standard machine: Used abrasive and fines fall through the abrasive collection hopper beneath the blast cabinet and are transported via a screw conveyor to a bucket elevator and to the abrasive reclamation unit. In the reclamation unit, the used abrasive is separated from fines and contaminants and returned to the abrasive silo.

Abrasive Reclamation Options

For improved abrasive cleansing, e.g. separation of aluminium flashes, a vibro sieve can be installed between the reclamation unit and abrasive silo. 

Option for Foundry/Heavy-duty Applications

A vibro conveyor can replace the screw conveyor to provide targeted cleansing/separating of sand and heavy contaminants from the used abrasive. The conveyor should ideally be installed with a magnetic separator (also optional) to remove sand in order to prolong the service life of the machine. The abrasive then goes to the airwash separator as before.

Manually Operated Monorail

As standard, the monorail system is designed in a Y-shape and equipped with two carrying hooks made from manganese steel. As an option, the monorail can be adapted to your individual request, e.g. as branch line or oval system.

The workpiece batches are manually pushed to the door of the shot blast machine where they are automatically taken by a feeding system. 

For especially heavy workpieces there is the option to install an automatic transport facility over the whole length of the overhead rail system.

Lifting Gears

Depending on the workpieces to be treated, and the preceding and subsequent processes, it may be advantageous to combine the carrying hooks with a chain hoist so that workpiece batches or heavy parts can be easily picked up. The chain hoist is operated directly at the loading/unloading station of the overhead rail system.

There is another advantage of using lifting gear with large machines: to provide an ergonomic loading/unloading process the machines without lifting gears are often placed in a foundation pit to lower the position of the workpiece carrier. When a lifting gear is used the foundation pit is not necessary.

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 HB 10/12 HB 12/16 HB12/20 HB16/16 HB 16/22 HB 16/26 HB 20/22
Max. diameter of workpiece batch (mm) 1000 1200 1200 1600 1600 1600 2000
Max. height of workpiece (mm) 1200 1600 2000 1600 2200 2600 2200
Max. weight of workpiece (kg) 800 800 800 800 800 800 800
Number of wheels 2 2 3 2 3 3 3
Power per blast wheel (kW) 7.5 (11) 7.5 (11) 7.5 (11) 7.5 (11) 7.5 (11) 7.5 (11) 7.5 (11)

 

Abrasive Removal

During the blast process, dust, broken abrasive and other solid particles or contaminants (fines) are generated by the rust and scale removed from the workpieces. The fines are separated in the abrasive reclamation unit which is individually adjustable to the different types and sizes of abrasive.
The Abrasive reclamation unit consists of an impact separator and a cartridge filter. The impact separator removes the fines from the abrasive and serves as a certified spark extinguisher and meets all ATEX regulations.
The cartridge filter provides the necessary negative pressure to remove dust. lt can be installed separately beside the shot blast machine. The filter is automatically cleansed by compressed air pulses which are adjustable in intensity and duration. All elements of the filter unit are free from ignition sources.
Alternatively, wet filter units can be used for the necessary dust removal. This is often applied in aluminium die casting.

Vibro Conveyor

In place of the standard screw conveyor, a vibro conveyor can be used to transport abrasive from the blast cabinet to the bucket elevator. The sieve installed in the vibro conveyor separates coarse fines from the abrasive. For dust removal, the conveyor is linked to the dust filter of the central machine.

Vibro Sieve

For a blast process without interruption, a vibro sieve is used to clean abrasive.
The vibro sieve is used after the abrasive reclamation unit and sieves coarse particles, such as flashes from aluminium diecasting workpieces, from the abrasive so that they do not affect the blast process.
The sieve is installed above the silo. It is driven by two vibro-motors and set in motion similar to a shaker sieve. A targeted sieving of unwanted fines is achieved with the mesh size adapted to the process. Fines are automatically fed into a bin via a downhose.
Lateral flaps allow easy access to the sieve for ease and maintenance.

Magnetic Separator

The magnetic separator increases your profitability by reducing machine wear and reducing abrasive consumption.
Moulding and core sand on castings is removed during the blast process. As they cause high abrasion they must be separated from the ferro-magnetic abrasive quickly and efficiently. This is performed in the magnetic separator.
Two rollers with adjustable magnetic fields and a sieving box separate the moulding and core sand and fines from the reusable abrasive, in this way only 0.2% of the weight remains. This reduces wear and abrasive consumption and leads to higher profitability for you.