New generation Ecopaint RoDip E
June 2013 – Every day, approximately 25,000 car bodies all over the world are painted with the Dürr Ecopaint RoDip rotary dip process. This technology is suitable for pretreatment (PT) and cathodic electro-coating (EC). It is used primarily in the automotive industry. Product Manager Klaus Heinsohn explains the advantages of the rotary dip process, and the benefits of the latest generation of the electrical version RoDip E.
In the development of its technologies, Dürr follows the Eco+Efficiency System. In addition to process enhancement, this system focuses on saving energy and material. How does the rotary dip process RoDip help to attain this goal?
In pretreatment and in EC, RoDip saves significant amounts of material, energy, and space. As the entire car body is rotated, there is no need for inclined sections at the entrance and exit, which reduces the length of the dip tank by up to six meters.
And what about the eco-balance?
For smaller dip tanks, you need less water and chemicals, and thus less energy for conditioning the bath. At the same time, the optimized RoDip dipping, flooding and draining processes guarantee a constant film thickness also in critical places, such as the rocker panel, and thus optimum corrosion protection. This optimum preparation for the painting process reduces the amount of paint required.
Dürr offers two RoDip variants: the mechanical version RoDip M, and the electrical version RoDip E. What is the difference?
This technology was first presented in the mechanical version RoDip M. Most of the 60 Dürr dip-painting systems all over the world work with this well-proven technology. But now, the electrical variant RoDip E is becoming increasingly popular thanks to its much greater flexibility. Furthermore, it offers better economic efficiency for smaller capacity requirements. The individually programmable single transport units make it possible to program specific dip curves for every vehicle, offering optimum conditions for the manufacture of different vehicle types on one line. Thus, RoDip E is extremely flexible and meets all customers' needs.
Today, RoDip E is being used in seven systems with almost one hundred carriers. This means that 25,000 vehicles worldwide are dipped every day with RoDip M and RoDip E technology. This clearly proves that this system has stood the test.
Is there still room for further development of the RoDip technology?
As we all know, standstill means decline. This is why we are constantly looking for potential improvements in our products. RoDip E is equipped with non-contact energy and data transmission. This means less soiling and wear attributable to bus bars, which are frequently used in comparable systems.
Improved hardware components make the latest generation of RoDip E more flexible, allowing for use of PLCs by different manufacturers. In future, communication will be available with 2.4 or optionally 5 Gigahertz. The second option practically excludes any interference by mobile communications and complies with the different legal requirements in the various countries where the system will be used.
Furthermore, the design of the new RoDip E will be more robust, making it suitable for coating commercial vehicles in addition to passenger vehicles. Currently, the new version is being thoroughly tested with a number of different car bodies in our Technology Center in Bietigheim-Bissingen.