With the development of their new scraper type HD, Hosch say that they have developed the first scraper in the world, which is installed at the three o’clock position on the head or discharge pulley and offers efficient and safe belt cleaning, even under the most difficult conditions, e.g. wet, sticky and clay materials.
Where there are imperfections on the belt surface due to patches, clips, tears or obstructions, the unique deflection function of the Tungsten Carbide tipped cleaning modules protects the belt against further damage, greatly improving the operational safety of the conveyor belt system. After deflecting, the affected module(s) return to contact the belt automatically once the obstruction has passed and continue cleaning. The new scraper can be used on belts with or without mechanical splices and on reversing belts.
This means that the old practice of having to disengage scrapers on belts that had been damaged or temporarily repaired or clipped until the belt is properly fixed or replaced is a thing of the past. Downtime is minimised and productivity maximised.
One of the major disadvantages of common head pulley scrapers is the high wear rate of the blades, combined with the quick and progressive reduction of the scrapers cleaning efficiency during the lifespan of their blades. Continual adjustments and regular blade changes are then required to minimise this problem.
Hosch say that with their new scraper, this is not the case and that the Tungsten Carbide tipped blades of the cleaning modules give maximum lifetime, constant high cleaning efficiency and no maintenance for the life of the blades.
In addition, the spring loaded multiple cleaning modules, each with an individual deflection and wear-tracking function compensate for uneven wear due to material load, belt and pulley profiles. The Hosch HD scraper range is suited for belt speeds of up to 7.5m/s and belt widths of up to 3.2m.
As early as 2001, Hosch developed their first ideas concerning this new type of scraper. The company gathered experience from trialling prototypes of this scraper using long standing customers located around the world. The technology and design continually improved until now, where the scraper is ready to be launched into the market. The managing director of Hosch worldwide, Eckhard Hell, says: "We are confident that we can start full production in the second quarter of 2009 and that this revolutionary system will then be available to our customers."