To achieve best results in its painting processes, Nordex Uruguay has contracted Dürr Brazil to supply a fully automated painting line – a milestone for the local industry. As this is the first automated painting line in the country it was also supported by governmental and municipal agencies. Start of production is planned to be in May 2021. The Dürr team managed the project successfully despite all challenges due to the Covid-19 pandemic.
Dürr’s automatic painting line starts after pretreatment of the car bodies. In a cleaning cabin the body is prepared thoroughly. This process ensures, that the vehicle enters the line without any impurities. After this initial step, the inner car body is painted manually, according to the customer’s requirements. For this process, Dürr’s EcoGun spray guns come to use. Subsequently, the exterior is painted automatically by four Dürr painting robots EcoRP. This painting process, in which different coatings can be applied, is followed by a flash-off period during which the solvents can evaporate from the surface. The following clear coat application is for protecting the paint and brightening the color. Again, the interior is painted manually, and the exterior is painted by two Dürr EcoRP robots.
While the vehicles are being transported to the oven, there is another flash-off period. The oven has a size of 36 meters and a temperature of about 180 degrees. In this stage the applied painting hardens. Finally, the vehicles pass through a cooling tunnel to lower the temperature. This step provides more safety and ergonomics to the operator who receives the car body at the end of the painting process.
Smart painting technology
In both cabins, base coat and clear coat cabin, Dürr’s unique painting technology allows the robots to identify each body and to configure the paint setting accordingly. In the paint supply room, eight groups of tanks – six base coats, one clear coat and one solvent – automatically provide the corresponding materials for manual as well as for automated application. A heat exchanger controls the processing temperature at any time and guarantees optimal results. With Dürr’s painting technology the customer’s requirements on quality and precision are fully achieved.
In addition to the application system, Dürr provides a Wet Scrubber System. This consists of a closed water circuit, installed below the application booth, that captures surplus paint. The contaminated water goes through a separation and filtration system, where the paint is chemically separated from the water to be used again in the process.
Due to the Covid-19 pandemic the installation of the painting line was even more challenging. However, Dürr followed all safety and prevention protocols to meet Nordex’ requirements and assembled this important line in time.
“This project was challenging, mainly due to the pandemic. All areas of the company were involved, we worked together overcoming all obstacles, not only technical, but also with the permits to enter the country, due to all additional restrictions imposed by the pandemic. The process has been enriching and we have a very committed team doing work with extreme quality and efficiency. We are very happy to be part of this very important project for Nordex,” commented Guilherme Custódio, Dürr project manager.