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The full-electric SE-D series injection molding machine developed in 2001 was equipped, in its standard version, with direct drive mechanisms to drive all the units, such as injection, metering, mold clamping and ejection. The series proved to have superior performance to an accumulator type hydraulic injection molding machine, controlled by servo-valves. The application of a highoutput and quick-response low-inertia direct drive mechanism injection unit and a quick-operating, high rigidity mold clamping unit was the key to achieving the performance. The mold clamping unit includes both toggle and direct pressure type features, thanks to the introduction of a center-press platen that minimizes distortion in the central area of a moving platen. The new SE-DU series was developed by providing a new servo mechanism for even more precise molding operations and by upgrading applications for high productivity, while maintaining the above features of the SE-D series. This paper reports on the performance and features of the SE-DU series, including a servo drive mechanism, clamping force feed-back control for centerpress platens, mold protection, plasticization control, and N9 controller.
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