The successful implementation of the tandem mixer technology can be considered a quantum leap for the tyre industry. It offers such high performance that it may well become the standard in other areas of the tyre industry in the future. This technology provides considerable potential for improving the quality and efficiency of practically every process in mixing facilities. The ability to distribute the mixing process over two machines is at the core of the tandem procedure.
The top machine can take care of producing the masterbatch, for instance, and is thus responsible for the quality of dispersion. It generates a high level of specific energy for mixing in order to achieve a good dispersion of fillers. If the ram is effectively applied, the mixture can be more efficiently fed into the area between the rotors and thus subjected to a high shear force. The bottom machine is much larger and can distribute the mixture components, for example. This method offers many benefits. In the case of reactive mixtures, it can be used to separate the dispersion from the reaction so that they practically run in parallel. Additionally, mixing times can be shortened further for final mixes, and entire mixing steps can even sometimes be skipped for multi-step mixtures.