TECHNOLOGY | ENERGY MANAGEMENT
both its electric ad hydraulic injection machines. The drive configuration cuts energy consumption by up to 35% compared to modern regulating pump systems, the company says, with additional energy costs cut by the reduction of electric reactive power. The injection unit for the new series is based on the company’s highly repeatable standardised injection pump control system and hydraulic screw drive design. The swiveling injection unit comes in six dimensions (size 130, 210, 350, 525, 750, 1000). The moving platen is driven by two diagonally positioned traveling cylinders that are combined with a hydraulic differential control system that enables dynamic movements by means of a further improved hydraulic system with a proportional valve, according to the company. The traveling cylinders are dimensioned for high opening forces, while extensive use of hydraulic pipes instead of hoses reduces potential maintenance expenses. The SmartPlus line is also equipped with the company’s patented Kinetic Energy Recovery System (KERS) technology originally designed for the EcoPower line of all-electric units. It converts recovered kinetic energy released during braking into electrical energy that is used to heat the injection barrel, further boosting energy efficiency. The machine comes with the company’s Unilog 8 control system logic on a 21.5-in laterally swiveling multi-touch screen display and high-performance B8X hardware.
Below: The new CT-6 Spec injection presses from Sumitomo (SHI) Demag offer 50-60% energy savings versus a comparable hydraulic
Sumitomo (SHI) Demag launched a new line of mid-sized full electric machines for packaging product applications such as cutlery, caps, and some container types, which operate on cycle times ranging from 6-15s while operating 50-60% more energy efficiently than a comparably sized hydraulic. The new CT-6 Spec injection moulding models
are a variation of the SE-EV-A HD series of all-elec- trics but have high-cycle performance specifications such as injection speeds up to 330 mm/s. The new models have enhanced cooling and energy manage- ment. The enhancements allow for the shorter cycle
time capability, says Tony Marchelleta, Sumitomo (SHI) Demag’s US National Sales Manager. The higher injection rate (12.2 in/s) is twice the velocity of the stand SE-EV-A model (6.3 in/s), opening the door for an all-electric machine to tackle applications typically completed on a hybrid machine, says Marchelletta, such as thin-to-medium wall containers requiring high filling speeds, or caps and closures produced in a sub-10s cycle, or parts with a long flow path like pipettes or injectable pen components for the medical industry. The SE-EV-A HD CT-6 Spec is available in eight models with clamping force sizes ranging from 224 to 550 tonnes. Each main axis of motion operates independently and uses a Sumitomo designed and built low-inertia motor and drive. Separate servo driven belt and ball screw drive systems are responsible for plasticising, injection, and ejection, while a direct drive servo system operates the more rigidly designed toggle to mechanically open and close the clamp and build up pressure. The company’s new S-Move clamp force control technology allows for optimised clamp open/close speeds up to 56.6 in/sec. Use of the belt drive overcomes limitations of
direct drive motor technology where the servo is directly coupled to the mechanical device when managing deeper draw parts that require longer ejector strokes, higher injection pressures, hold times and injection speeds, says Marchelletta. Sumitomo (SHI) Demag currently installs its direct drive servo systems on SE-EV-A models that are under 180 tonnes of clamping force. The CT-6 Spec incorporates the SE-EV-A HD’s
control platform and the company’s defect mini- malisation system called Zero-Moulding, com- prised of its Simple Process Setting (SPS) system to ease machine setup, Flow Front Control (FFC) system for balanced filling and Minimum Clamping Molding (MCM) system which reduces clamp force requirements. Other features include the installation of an
extended L:D mixing screw assembly for fast cycle moulding as standard on the CT-6 Spec, and the ejection unit is designed off to the side of the machine rather than in-line with the clamp to shorten the footprint of the machine. A new energy monitor built into the CT-6 Spec allows the machine user to analyse
energy consumption of any motor or drive during any phase of the production process to optimise cycle time or push a button and let the controller optimise the process, says Marchelletta. Also, ample tiebar spacing and the
14 INJECTION WORLD | June 2022
www.injectionworld.com
IMAGE: SUMITOMO (SHI) DEMAG
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