When a Polish manufacturer of complex steel weldments was ready to invest in a new shot-blast machine, quality, capacity, high equipment uptime and integration into the manufacturing flow were key selection criteria. As an essential part of the pre-treatment operation for a cathodic painting line, the new shot-blast system had to produce optimal surface preparation results within an interlinked work flow in a three-shift operation. The company chose a Rösler RHBD 17/32-K continuous-feed spinner hanger blast machine because of its wear-resistant design and favourable operating costs.

The specialty of Stelweld is the production of complex steel weldments, including machining, laser and CNC cutting and bending processes, as well as painting and powder coating.

Danuta Dobrzynska, project manager at Stelweld, says: “Within the framework of a recent expansion we wanted to automate the shot-blasting operation and integrate it into the painting line. To date, the paint preparation process was predominantly manual.

“Rösler does not offer the lowest price, but with regard to quality and technical features this supplier offered many advantages,” continues Dobrzynska. “Compared with competitor products, all essential components of the Rösler shot -blast machine consist of wear-resistant materials, such as the blades of the turbines, which are made from forged tool steel.”

The Rösler RHBD 17/32-K continuous feed spinner hanger blast machine allows the blast cleaning of a wide spectrum of 3D weldments with dimensions of up to 2500 x 1200 x 3000 mm (L x W x H) and weight up to 1250 kg. At cycle times of 6 to 8 minutes, the automatic shot-blasting process produces a finishing quality of SA 2.5 on the entire surface of the steel weldments to ensure excellent paint adhesion.

For further information
www.rosler.com