Everything Stable with this Table

New Lovejoy ROSTA® Device an Aggregate Industry Innovation

(PRWEB) November 2, 2004 -- Everyone accepts, as a matter of course, the wear and tear and costly replacement of aggregate industry equipment, particularly the belt drive. The belt drive is the first area to receive and transmit the bulk materials to other locations for further processing or transport. Its a rough business. However, the normal course of business is about to improve, thanks to an innovative device from Lovejoy® ROSTA®. A new anti-shock belt transfer table absorbs the dynamic energy of falling rock to reduce vibration and noise and best of all, extends equipment life to help increase the profit margin.

Based on the use of ROSTA® Type ESL impact dampers, the anti-shock belt transfer table also makes use of energy absorbing slide bars. The impact dampers effectively divert the high dynamic acceleration of falling blocks of bulk material, while the slide bars ensure optimum belt guidance even during impact, thanks to the low coefficient of friction.

Its no secret that stones and ore blocks with large granulation damage belts by their extremely high impact energy. They can tear the rubber cover to shreds down to the casing. Belts that need repair (vulcanizing) or replacement not only damage the profit margin by virtue of the new material purchase, but also lost production time due to the necessity of stopping the conveyor system for several hours.

Most conventional transfer stations rely on rubber-ringed suspension rollers or rubberized guide strips to help limit compensation of impact energy. However, a few millimeters of rubber soon loses the battle against heavy, sharp edged blocks with large granulation. Factors that aggregate operations need to take into consideration when designing a system that will last include the specific gravity, force of impact, height of the drop, relevant maximum particle size and belt width.

In contrast to formerly conventional systems, the ROSTA impact dampers divert the dynamic energy and provide effective belt protection, from both surface and casing damage. The anti-shock table utilizes ROSTA anti-vibration Type ESL mountings, designed to accept compression, tension and shear loadings, as well as combined loadings. The elements themselves are maintenance free, insensitive to water and dirt, and are designed to function in temperatures ranging from -40 to 180 degrees Fahrenheit.

ROSTA Anti-Shock Belt Transfer Table///add one

The key is in its multi-directional mount design, which compensates on the x-, y-, and z-axis. The smallest, Type ESL 15, is designed to withstand up to 90 lb. loads, while the larger style 50 can handle upwards of 2,000 lbs per mount. In itself, each unit does not add a lot of weight to the anti-shock table; the largest ROSTA ESL unit is only 22 lbs. The units are uniquely well suited for this type of application. The maximum load on the x-axis is nearly double that of the z-axis, considering the maximum force on the units in the anti-shock table will impact the x-axis.

The net effect of the central section of the anti-shock belt transfer table is that it can provide individual absorption, depending on the impact energy, and therefore offer effective protection for the belt against damage. The slide bars are rigidly mounted to help prevent lateral movement of bulk material during impact absorption.

The anti-shock belt transfer table is standardized to fit all standard belt widths and is available in varying lengths to fit a particular load zone. Normally, the design incorporates up to six or eight ROSTA impact dampers mounted below the sprung central section, of capacity varying according to belt width.

In summary, the new anti-shock belt transfer table fitted with ROSTA® impact dampers can:

•Ensure long working life for the belts;

•Reduce costs for repairs and maintenance;

•Prevent costly system stoppages for vulcanizing repairs;

•Protect the belt-frame substructure from fatigue factors; and

•Absorb structure-borne and airborne sound.

The ROSTA® Type ESL Anti-vibration mountings also helps dampen solid borne noise transmission and reduces vibration in other systems outside of the aggregate industry, such as control equipment, rotary machines, compressors, refrigeration systems, blowers, pumps, mills, mixers, and more.

The ROSTA line of products is just one of many engineered solutions provided to the global network of Lovejoy, Inc. customers. Founded in 1900, Lovejoy enjoys an international reputation as the leading company specializing in flexible coupling design and development. Lovejoy products are available worldwide through distributors in North America and 55 other countries, supported by Lovejoy offices and support staff in Canada, Europe and the USA. Lovejoy, Inc. is certified under the ISO-9001:2000 International Standards for Quality Management.

For more information, visit Lovejoys Web site at www.lovejoy-inc.com, or contact Lovejoy, Inc., corporate offices at 2655 Wisconsin Ave., Downers Grove, IL, 60515, USA. Phone 630-852-0500; fax 630-852-2120; e-mail inquiries Info@lovejoy-inc.com.

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