Demoulding of tires from segmented mould

Abstract

Segmented moulds are special tools intended for tires with a complex groove pattern and demoulding is the final stage in tire manufacturing process during which some damage on tire surface can occur. The aim of this work is to carry how the amount of segments will influence the stress generated during mould opening on the rubber surface, as well as investigation of opening force required for the segment radial moving based on segment angles. The obtained results showed that for proposed symmetrical design of tire and material properties, the generated stresses are negligible and all proposed solutions may be used. If we do not consider the economical part, the optimal segment angle is 23° and the number of segments is 11.