Mold temperature-control equipment manufacturer SINGLE Temperiertechnik GmbH (Hochdorf, Germany) has introduced EcoPlus, a label that marks improved and more efficient hydraulic, electric or thermal systems on the company’s machinery. Temperature control systems of the N1, NS and S units are marked by the EcoPlus label because of additional equipment, such as Grundfos centrifugal pumps, which replace standard peripheral impeller pumps. The power efficiency of these centrifugal pumps is increased by a factor of three. The compact pumping units are said to consume significantly less energy in standard systems but achieve a comparable flow rate. On SINGLE’s ATT (Alternating Temperature Technology) unit, by returning the temperature control media after cycle switch over, the system recovers the maximum energy content of liquid media. SINGLE notes that this approach is not possible with cartridge heaters, ceramic elements or induction heating used in combination with water cooling. In cyclical processes, such as injection molding, the EcoTemp passive alternating temperature control interrupts mold cooling during the injection phase to allow the cavity wall to heat up. EcoTemp can, therefore, shorten the cycle time and, says SINGLE, frequently achieves savings in the double-digit percentage range. Further, EcoTemp reportedly reduces the supply temperature during cyclical processes. Finally, all SINGLE temperature control and cooling systems with pump speed control also have been awarded the EcoPlus label. With this capability the flow rate can be limited to the capacity required for the process. The reduction of energy consumed by the optional pump is disproportionate to the pump speed reduction.
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