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Automated coating technology for industrial chair production
Interstuhl Büromöbel, one of Europe’s established chair manufacturers, has implemented modern coating technology from Dürr for the production of its industrial and laboratory work chairs. The system automates the coating of the inner surfaces of foam moulds, combining a modular paint supply station and a two-component process to handle up to five colours.
The manufacturer, headquartered in Meßstetten, Germany, has been producing office chairs for over 60 years. In the production of its industrial and laboratory chairs, a spray gun precisely coats the inside of the foam mould. Once liquid PU foam is poured into the mould, it absorbs the coating and assumes its colour.
“The paint used is special — it serves multiple functions,” explains Fabian Schilt, Head of the European Industrial Sales Team at Dürr. “In addition to providing colour, it provides the necessary conductivity. Since the chairs are used in cleanrooms and ESD areas, among other environments, it is essential that no static charge is generated.”
Compact paint supply for confined spaces
In September 2025, Dürr supported PU plant specialist Hennecke with the installation of painting equipment on an existing robot at the Interstuhl site in Meßstetten-Tieringen. The setup includes a painting robot equipped with a spray gun, six EcoSupply2 Core stations for paint supply, and a two-component control unit. Interstuhl currently processes three colours, but the system is already designed to accommodate up to five.
The paint supply station is compact and user-friendly, making it suitable for industrial applications where painting occurs in confined spaces. At Interstuhl, the stations are additionally equipped with pumps, valves and paint change blocks — components that have proved particularly effective. The paint material poses specific challenges: it is difficult to flush, hardens quickly and tends to clog valves.
Validated in extensive testing
Testing at the Dürr Test Centre in Ledeč nad Sázavou, Czech Republic, confirmed that the valves used in the system have no dead space, meaning no material settles and processing remains reliable and clean. “We were convinced by Dürr right from the first demonstrations of the painting technology,” says Andreas Kunst from Interstuhl. “The technical team was always there to support us and led the project to success with a great deal of expertise and commitment.”
More information: www.durr.com