Dürr Introduces Next-Generation RoDip Rotational Dip Process

RoDip Ezy replaces RoDip E while continuing to use the proven rotational dip process for pretreatment and cathodic electrocoating. At the same time, key components—including the trolley, rail system, energy transmission, and control system—have been completely redesigned. The result is a compact system that is easier to install and maintain, while also offering greater flexibility in plant planning. The rotating drive is based on a compact cycloidal gearbox, a technology already proven in Dürr’s industrial robots. RoDip Ezy also ensures a standardized trolley concept across different weight classes, supporting everything from passenger cars to vans.

Turntable replaced with curved routing

A key innovation in RoDip Ezy is the introduction of a curved line layout. Unlike RoDip E, which relies on turntables for direction changes, RoDip Ezy allows trolleys to move through both left- and right-hand curves. This eliminates the need for complex turntable systems. As a result, plant design becomes simpler and the production line more flexible. Along with the traditional two-loop setup—using separate trolleys for pretreatment and cathodic electrocoating—a single shared loop system is also possible, where the same trolleys handle both processes. This configuration reduces the need for external conveyor systems, as well as the number of rails and trolleys required.

“RoDip Ezy is suitable for both new plants and for modernizing existing factories,” says Klaus Heinsohn, product manager at Dürr. “Since RoDip Ezy can navigate curves of 180 degrees or more, it means we can adapt the routing to challenging spatial conditions or different distances between the process steps as required.”

Lightweight aluminum profiles

The new rail system uses standardized aluminum profiles already applied by Dürr in other areas such as final assembly. Their lower weight makes them easier to handle, quicker to install, and simpler to integrate into the system. Unlike previous steel components, they also eliminate the need for extensive adjustment work.

More than 100 million vehicles worldwide have already been protected against corrosion using the RoDip system, which is considered a benchmark for rotational dip processing. This space- and resource-efficient technology rotates vehicle bodies around their own axis, requiring only short immersion tanks for dipping, flooding, and draining.

Alongside the mechanically robust RoDip M, the portfolio now includes RoDip Ezy—a flexible, programmable variant that offers significantly greater freedom in plant layout planning.

Source: Durr