Plastic presses work with high forces and long holding times. In these partial load phases, the hydraulic system needs only little or no flow, since it applies holding forces without using energy by closing the valves.
The Rexroth 4EE Solution
The machinery manufacturer replaced the original constant speed drive for the hydraulic power unit with a variable speed pump drive from the Sytronix family. It lowers the rotational speed as needed. Aside from those direct energy savings, Sytronix also lowers the cooling power required for the hydraulic system by over 80 percent in this application. In addition, the new concept features high-efficiency synchronous motors and energy recovery through drive amplifiers.
The new automation solution with the Rexroth 4EE levers lowers energy consumption by 78 percent without any loss in performance.
Experience is especially important when it comes to plant construction and engineering. Our specialists are fully focused on the requirements in your industry. We always advise you on a technology-neutral basis, placing your application at the center.
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