Eirich mixers, German-engineered and locally manufactured by Birkenmayer, have revolutionised industrial processes for over 150 years. Thanks to constant product refinement based on industry demands and determination to create robust yet easily maintained machines, Eirich’s technology utilises effective mixing principles that are employed in more than 300 branches of industry.

This rich history has enabled Eirich to develop five new mixers in the last five years that have drastically reshaped the mixer industry, by introducing sleek designs and the latest electronics, without losing the integrity of the famous Eirich Mixing principle.

The first new development is the R12, with a usable volume of 250 litres in the basic version or 400 litres in the more powerful RV12 variant. In this mixer the accessibility of the tools in the inclined mixing pan was improved and the drives for the mixing tool and the mixing pan have been mounted at the side and covered by a protective hood. This has resulted in the motors, electrical terminal boxes and the central lubrication unit being protected against the ever-present dust in concrete production. The inclined position of the mixing pan and the protective hood at the side form the striking lines of the new design. In the R12W version, the mixing tools can be driven upwards together with the mixing pan lid. This makes the entire mixing area particularly accessible, which is advantageous for manufacturers of polymer concretes, for example.

The second new development is the R16, the new big brother of the R12. It has a usable volume of 600 litres in the R16 version and 900 litres in the RV16 version.

The third new development is the EL1, a 1 litre laboratory mixer, developed among other things for applications in high-tech ceramics where, for example, very expensive raw materials are used for the development of specialised ceramics. In these applications the Eirich mixer is used for dry mixing, granulating, coating, kneading and for the dispersing/manufacturing of slurry. Concrete customers are now also showing interest in the EL 1 as the mixer is exceptionally well suited for the preparation of mortars.

“There are very good reasons why this mixer has a universal design. It has everything that a large Eirich mixer also has (rotating mixing pan, wall scraper for mixing without dead zones, with 100% mixing within one revolution of the mixing pan and the agitator mixing tool), but it also has a lot more: the inclination of the mixing pan can be adjusted to 30°, 20°, 10° or 0° with a minimum of effort; the agitator rotates in both directions and runs with infinitely adjustable tool speeds of between 2 m/s and 30 m/s. The data from the mixing sequence work can optionally be acquired and read out via a USB stick. Additionally, the low weight of the mixer, which is designed for an input voltage of 100 to 240 V in order to enable global use, is only 46 kg,” says Louis Eksteen.

Eirich’s fourth and fifth developments are of a somewhat larger calibre, the R28 with a usable volume – depending on the design – of 4 000 to 5 000 litres and the R33 with a usable volume of 5 000 to 7 500 litres. In terms of design, both machines can be altered depending on the mixing task, with the inclination of the mixing pan varying between 20°, 10° and 0° and the number of agitators between one and two. Naturally these two new machine types exhibit the proven Eirich characteristics, a rotating mixing pan, a mixing tool with variable speed and direction of rotation and the covering of the drive units.

Eirich’s on-going efficiency and quality improvements for its unique mixing technology, as well as its commitment to working together with clients will enable the company to provide superior mixers that ensure homogeneity of product for the next 150 years.