PaintExpo 2026 will take place in Karlsruhe (Germany) from 14th to 17th April.
At PaintExpo 2026, Walther Trowal will present two new Rotamat coating systems: the Rotamat R 60 for the insulation coating of extremely small electronic components, and the Rotamat R 100, designed for large, flat sealing components used primarily in electric vehicles. Both machines were developed specifically to process workpieces that, until now, were unsuitable for mechanical drum coating.
For the insulation coating of very small electronic components – such as magnetic cores with volumes as low as one cubic millimetre – Walther Trowal has equipped the Rotamat R 60 with a uniquely shaped rotary drum. Specially designed ribs and deflectors inside the drum ensure that each workpiece receives a perfectly homogeneous coating, which is essential for reliable insulation performance. Despite their extremely small size, the components do not stick together during processing and are discharged individually at the end of the coating cycle.
Walther Trowal will also showcase the Rotamat R 100, developed for coating large, flat sealing components made from elastomers. These sealing elements are widely used in electric vehicles, for example to insulate individual battery cells and cooling systems incorporating heat exchangers. They are also employed in fuel cells and electric motors. Depending on the application, the coating material may consist of anti-friction or coloured lacquers.
The new Rotamat R 100 has a usable volume of 160 litres. In a single batch, it can process around 150 flat sealing components with diameters of up to 350 mm, or approximately 50,000 O-rings – around three times the capacity of its predecessor, the R 85.
“Until now, Rotamat coaters have mainly been used for smaller components such as O-rings. With the new R 100, we have taken a completely different approach. It is the first system of its kind that enables manufacturers of significantly larger sealing components to coat their products fully automatically and with a highly cost-efficient process,” has stated Frank Siegel, Sales Manager for Coating Technology at Walther Trowal.
In addition, the Rotamat R 100 is suitable for decorative coating of plastic components made from ABS or polyethylene, as well as thin-walled metal rings with diameters of up to 300 mm. These rings, used as shaft seal rings, are first treated with a bonding agent before the elastomer coating is applied.