10.2 Abrasive-return systems (fully automatic)
As regards the fully automatic return the entire floor of the hall is equipped with a return system.
Scraper system
Sheet metal paddles with rubber tape draw the abrasive over the floor of the bucket elevator. During the back motion the paddles fold down and run over the abrasive. The system is simply structured and convinces by its low building depth.
Operating principle of a
scraper system(side view)
Click to enlarge!
Vibration conveyance system
Feeding of the troughs is performed via the metal sheet funnels, the troughs are oscillating into the direction of the bottom. These vibrations cause the abrasive to “jump” forward. Because transport takes place in the air the system requires less maintenance and wear and tear are low as well.
Operating principle of the
vibration system (side view)
Click to enlarge!
- Table of contents
- 1. Fields of application of abrasive blasting technology
-
2. Blasting technology
- 2.1 Airless blast cleaning
-
2.2 Injection blasting
- 2.2.1 Compressed air blasting (also air blast cleaning or sand blasting)
- 2.2.2 Pressure blasting (injector blasting)
- 2.2.3 Vacuum-compressed-air blasting and vacuum injection blasting
- 2.2.4 Damp blasting
- 2.2.5 Wet blasting
- 2.2.6 Slurry blasting
- 2.2.7 Ice Blasting
- 2.2.8 Water- jetting cleaning and hydro-jetting
- 2.2.9 Wet blasting for fine surface treatment
- 2.2.10 Combination of different blasting methods
- 2.3 Laser cleaning
- 3. Abrasive
- 4. Efficiency assessment of abrasive blasting
- 5. Influence of compressed-air blasting on the surface of the workpiece
- 6. Generation of compressed air
-
7. Plants for compressed-air blasting
- 7.1 Small and medium-sized blasting pots
- 7.2 Large blasting pots
- 7.3 Double-chamber blasting pot
- 7.4 Mixing and dosing valve
- 7.5 Hoses, lengths of hoses, couplings
- 7.6 Selection of a blasting pot in considering the wear and tear behaviour
- 7.7 Increased wear and tear at the blasting pot caused by wrong adjustment
- 8. Remote control and emergency shut-downs
- 9. Jet nozzles
- 10. Stationary blasting halls
- 11. Mobile abrasive blasting equipment
- 12. Laws and provisions