Which rollers are suitable for roller curve conveyors?
Roller curve conveyors can also be designed with cylindrical rollers. However, these cause the material being conveyed to move in the direction of the outer radius and come into contact with the side guide. The friction between the material being conveyed and the side guide may then lead to damage to the conveyed material and/or the side guide.
Interroll therefore recommends the following: Roller curve conveyors should always be equipped with distinctively conical rollers. Interroll offers various series of these. Tapered elements that are pressed on a cylindrical steel pipe are always used here.
Are there differences between the conical solutions?
Yes, the disadvantages of conventional solutions become particularly noticeable at higher conveyor speeds. This is especially true if roller curve conveyors that have not been designed and installed optimally are used, or if conveyed materials other than those intended are subsequently transported.
This is because from speeds of around 0.8 m/s, the centrifugal force becomes greater than the frictional force, causing the material being conveyed to move outwards in the curve. In the process, the material being conveyed exerts a counter force on the tapered elements of the roller in the direction of the inner radius of the curve.
If this happens over an extended period of time, it increases the risk that the tapered elements on the roller's steel pipe will move. Gaps may appear between the elements on the roller and/or contact may be made with drive elements, such as the PolyVee belt, causing damage.