Hybrid Press Combines High Speeds with Energy Efficiency

Engel will introduce to the North American market its e-speed 720 US injection molding machine, which features an all-electric clamping unit and an energy recovery system, combining high injection speeds with maximum energy efficiency.

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Engel will introduce to the North American market its e-speed 720 US injection molding machine, which features an all-electric clamping unit and an energy recovery system, combining high injection speeds with maximum energy efficiency.

To avoid power peaks when short cycle times are combined with high clamping forces, a flywheel acts as an electrical power reserve, storing the braking energy from the platen movements and transferring this energy back to the motor when it is required for processes such as the reacceleration of the clamping movements. When the storage capacity is reached, excess energy from the generator is fed back into the grid, allowing the machine to run with a relatively low and constant connected load.

On the injection unit side, the Engel inline injection unit is used, enabling injection speeds ranging to 800 mm/sec. In addition, its particularly long opening stroke allows the machine to work with large stack molds.

At the show, the720-ton hybrid machine will use a 4+4-cavity mold from StackTeck to produce 1.5-liter containers. With high-speed automation from CBW Automation, the machine needs just 0.5 sec. to remove the containers from the mold.