The Influence of the Visco-Elastic Properties of Covering Materials on the Rolling Process of Two Cylinders.

The stress strain behavior of visco-elastic materials has been investigated A special measuring device was used to characterize the visco-elastic properties of cylinder coverings. The data for some typical covering materials used for inking and pressure rollers will be discussed. A theoretical analysis of the stress and strain in the nip will be presented as a function of the visco-elastic properties of the materials. The results will be compared to measurements of the vertical and tangential forces developed between a hard roller and an inking roller and the pressure distribution in the nip.