Belt scrapers offer an effective and continuous method for cleaning conveyor belts, helping to extend the life and productivity of the entire belt system. By preventing material build-up, belt scrapers help keep the belt from drifting off track, prevent erratic loads on the motor, eliminate uneven wear on pulley bearings and damage to return idlers, and minimise belt stretching.
According to Air Springs Supply National Sales and Marketing Manager Mr James Maslin, in addition to ensuring that scrapers are made from the correct material, it is also important to pay special attention to the style of actuation.
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 provided by flexible pneumatic actuators such as Airstroke air spring actuators from Firestone.
Airstroke air spring actuators are tough rubber-and-fabric bellows designed to exert against a surface, an amount of force that varies in continuous proportion to the amount of air pressure contained within them, enabling them to adjust to different load requirements simply by varying this pressure.
In addition, air springs provide force evenly over the surface upon which they are acting, rather than imposing sharp point loads. They will also undulate over irregular loads passing beneath them, flexing with the load profile if necessary to prevent jerking, jamming and strain on the production line.
Air spring actuators are increasingly being adopted by Australian manufacturers and processors for applications as diverse as fine food and pharmaceutical production, through to mineral processing and bulk material handling. The air springs are used in materials handling applications such as conveyor direction gate actuation, lift sections and bumper stops, through to stamping presses, gluing presses and flexible counter-pressure cushions for automotive body component presses.
Key benefits of air spring actuators:
- Ability to rotate through an angle without a clevis allows easy installation in compact spaces
- Ability to bend with load and tolerate high side loadings ensure performance without break or wear
- Contains no internal moving parts that will break or wear
- Prevents jerking, jamming and strain on the production line
- Proven over a wide range of materials handling applications
- Available in force capacities from a few dozen kilograms up to 40,000kg a unit