All-electric extrusion blow molding machine UMS 4E.S
Economical Mold Closing
At NPE in Chicago, Uniloy Milacron Germany GmbH / B&W Blowmoulding Systems, Großbeeren, Germany, showcased an all-electric extrusion blow molding machine. The UMS 4E.S single-station machine is comparatively economical with energy. Savings are principally made during mold closure. Energy is consumed to apply the clamping force, but as soon as the mold is closed, the machine no longer draws power. The result is that no energy is used for locking the mold during the entire blow process, which makes up most of the cycle time. The same concept is also applied to other machine movements (calibration and transport). The energy saving for machine movements alone is about 70%. As a proportion of the entire power consumption, including extruder drive and heating, it is 30% compared to a hydraulic line.
Another key feature is that the clamping force is applied by direct drives, which replace the hydraulic cylinders and manage without mechanical or lever systems. However, the basic machine design and mold installation situation remain unchanged. Customers can therefore freely interchange molds between all-electric, hybrid and all-hydraulic machines of the same model. The set-up times for product changeover are also not increased.
The clamping force also does not need to be adjusted for molds of different thickness, and the axes do not need to be calibrated when the machine is restarted. The screen pages of the machine controller (manufacturer: B&R Industrie-Elektronik GmbH, Bad Homburg, Germany) are also unchanged. This, too, makes it easier for machine operators to change from hydraulic to all-electric machines).
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