Polygonal Deformation of Roll-Covering Rubber. Practicability of Prediction Method.

Rubber-covered rolls are in wide use in many machines for processing, pressing and conveying paper and plastic film. We have studied the polygonal deformation caused by viscoelastic deformation of roll-covering rubber under high load and at high speeds. It is said that the above-mentioned phenomenon is influenced by rubber damping and its deformation recovery characteristics. Previously, we reported a prediction method for analysis of this phenomenon, regarding viscoelastic deformation as causing instability due to the time-delay deformation. In this study, we compared experimental with calculated results, and found good agreement between them. Moreover, in this report we describe methods for preventing polygonal deformation.