Abstract
Cellular elastomeric parts are used in various applications. Their cellular structure offers savings potential with respect to component weight, material consumption and costs. The foam structure is generated using chemical blowing agents, which are added to the rubber mixture before processing. Foaming and vulcanisation occur simultaneously in the curing unit. Both processes are adjusted by modification of the rubber mixture, which is one of the most challenging steps in rubber processing. The use of modified vulcameters for determination of the expansion of rubber mixtures is state of the art. However, this method is subject to several limitations. Therefore, IKV developed a new measurement system, which allows the analysis of the free expansion behaviour. Based on the Archimedean principle, the foaming process of rubber mixtures is recorded. A cell structure is generated, which can be analysed using digital image processing. In first experiments, several components of the rubber mixture are analysed using the measuring device in order to identify and categorise influencing parameters.
Published Version
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