Light alloy wheel production

Compressed air generation for rim finishing

According to the manufacturer, the compressed air station at the Borbet Group's new light alloy wheel production facility in Kodersdorf/Upper Lusatia is designed with energy efficiency and high availability in mind. The final expansion, which was completed in mid-2017, includes a total of ten CompAir L-series screw compressors, each with a drive power of 250 kW, which supply the entire plant, including the paint shop, with compressed air. These compressors generate up to 12 percent more compressed air than comparable machines in the same performance class. The compressors, with a total drive power of 1500 kW, are extremely energy efficient.

The first production step is the low-pressure casting process, in which liquid aluminum is forced into a casting mold under excess pressure.

The detailed design solutions include the specially developed compressor stage, which operates at very low speeds. This not only minimizes energy costs, but also results in comparatively low heating of the compressed air and therefore a high level of efficiency. The control system is also equipped with a web server module that sends current operating data, such as delivery quantities of the individual compressors, dew point of the compressed air, energy evaluations and error messages via SMS or email to a cell phone or tablet of the responsible employee. Alternatively or additionally, the data can also be visualized in real time on a PC or display.

In terms of energy planning, CompAir and Borbet thought beyond just the compressed air station: the supply and exhaust air flow is controlled according to temperature and season. sw

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