Exhibitor catalogue

MCH Messe Schweiz - Zürich
Zürich, Switzerland
12 - 13/02/2020

ROSTA AG

ROSTA AG

F12

5502 Hunzenschwil
Switzerland
www.rosta.ch

Since more than 70 years ROSTA AG is manufacturing machine components for the mechanical engineering based on a unique design of a rubber torsion spring offering the three technical functions of a spring device, a guide bearing and an anti-vibration mount in one mechanical element.
From Hunzenschwil, our head office and main manufacturing base, we do supply our machine components through our worldwide distribution network to the customers on all five continents. Six subsidiaries in Canada, Germany, Italy, China, USA and Australia are also manufacturing some of our ROSTA torsion springs locally, according to the relevant market requirements.
With the wide range of our standardized machine components, which are worldwide available from stock, most of the requirements on a mechanical spring device for the general machine construction can be fulfilled. Does the ready-made spring not fit your requirements, we will “tailor” it for you. Please ask our customer service for a call, we will be pleased to design your customized built-in part.

Products

Product news

  • Oscillating Mountings Type HS (Hanging Screen)

    ROSTA type HS oscillating mountings
    for the suspension of discharge chutes and suspended screens

    The ROSTA Type AB oscillating mountings have created a good name for themselves as screen box suspensions in screening technology thanks to their high isolation effect, high level of lateral stability, security against overload and high resistance to corrosion.

    For reasons related to the process, approximately 20 % of all screen and discharge chutes have suspended mounts under material bunkers and metering shafts. ROSTA Type AB oscillating mountings are also often used for the assembly of these vibration units, as a suspended screening machine can be directly connected to silos and bunkers using AB suspensions without having to organise complicated yoke constructions.

    Up to now, however, the isolating effect resulting from AB oscillating mountings with suspended vibration units has been less efficient, especially as the suspensions, which have been designed for pressure loads, are considerably stiffer under tensile loads, with widely opened guide arms.

    The new HS suspensions (Hänge-Sieb / suspended screen) have a guide arm geometry that is designed for tensile loads. With ideal loading, the natural frequency of this suspension thereby sinks from its former 5.5 Hz to only approx. 3.5 Hz, which guarantees an isolating effect > 97 %.

    The HS suspensions are now available for the load values listed below:

    HS 27 for tensile loads of 500 - 1,250 N
    HS 38 for tensile loads of 1,200 - 2,500 N
    HS 45 for tensile loads of 2,000 - 4,200 N
    HS 50 for tensile loads of 3,500 - 8,400 N
    HS 50-2 for tensile loads of 6,000 - 14,000 N

    Customer benefits from ROSTA type HS oscillating mountings

    - Direct installation under bunkers = No complicated yoke construction required
    - Low natural frequency of the suspension = Low residual vibrations in the silo structure and the building
    - High lateral stability = Short, controlled and safe run-out of the vibrating machine

    http://www.rosta.ch/en/products/oscillating-convey...