Battenfeld: Automatic Vacuum Control for Calibrating Tables
It is well-known among profile manufacturers that the start-up of the extrusion line requires much more vacuum than the later run under production conditions. This fact causes a waste of energy as during production more vacuum pumps are running than actually required. In order to eliminate this waste of energy Battenfeld Extrusionstechnik in Germany has launched its new ZV-series of profile calibrating tables with Automatic Vacuum Control. With this new system the operator is in a position to enter different vacuum levels at the operator panel. Each vacuum level entered will be maintained exactly during production and the control makes sure that no more vacuum pumps are running than really necessary. Even if one of the vacuum pumps fails and must be replaced during operation the control still ensures a steady vacuum. Tests have shown that it is possible to run a window main profile with only 1 x 3 kW vacuum pump instead of 4 x 5,5 kW as previously used. Even more impressive are the results if the Automatic Vacuum Control is used for dual strand extrusion as usually eight or more vacuum pumps are employed. This high potential of energy saving has already convinced several customers worldwide who have received their calibrating tables with the new Automatic Vacuum Control. The Automatic Vacuum Control also has a very positive side effect: There is no unpleasant noise which is usually caused by leaking air.