Why use conveyor belt scrapers?
- prevent material build up
- keep the belt from drifting off track
- prevent erratic loads on the motor
- eliminate uneven wear on pulley bearings
- minimise belt stretching
While in some instances metal springs, flexible blocks or torsion bars will satisfactorily position the scraper adjacent to the belt surface, other applications increasingly require more sophisticated, flexible and continuously supple arrangements. These can be provided by flexible pneumatic actuators, such as Airstroke® air spring actuators from Firestone.
These tough rubber-and-fabric bellows are highly engineered balloons. Because the amount of force they exert against a surface varies in continuous proportion to the amount of air pressure contained within them, they can adjust to different load requirements simply by varying this pressure.
Air springs provide force evenly over the surface upon which they are acting, rather than imposing sharp point loads.
Now being adopted by Australian manufacturers and processors for uses as diverse as fine food and pharmaceutical production, through to mineral processing and bulk materials handling, air springs also have another major advantage for design engineers: the ability to rotate through an angle without a clevis.
Air springs are easy to install in space limited areas and the ability to bend with load means the air springs will perform where more rigid alternatives would break or wear.