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Rheological investigation of three rubbers with different shore factors

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A great variety of rubber parts is produced for the automotive industry. To minimise problems during the assembly of the cars and to ensure good performance, the parts have to be manufactured with small possible variation in size and shape.

The size can be controlled by the extrusion and injection parameters, the shrinking of the material can often be well estimated.

The problem is not only the relaxation of the rubber after leaving the mould; this can be controlled by an appropriate design of the injection process.

There can also be variation of the shape before entering the oven for vulcanisation, which takes typically half an hour.

Due to gravitational force there can be significant changes in shape of an injected part depending on the rubber formulation used.

To avoid such effects and to improve production performance, it would be highly advantageous to predict the respective properties of the sample.

The presentation will show that prediction of shape stability is possible with appropriate Rheological investigations by Rheology Solutions .

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