System 500-2000
Competence for large solutions
What is true for all parts also applies to large molded parts: good part quality is no longer sufficient to stay competitive in today`s open markets. What is called for today is solutions that permit easy and flexible adaptation to address new challenges and meet the requirements of new tools, new materials and ever more complex applications. It is for such requirements that the large Demag system series from 5,000 kN to 20,000 kN is a perfect match:
The System at a glance:
Versatile: Bespoke-tailored solutions for large mouldings; flexibly adaptable to new moulds, materials and complex applications; a choice of screw geometries are available for processing different plastics
Precise: Low-wear when working with heavy, large moulds; fast, precise opening movements coupled with quiet running, optimum platen parallelism; non-contact ultrasonic sensors for all movement axes
Modular: Open architecture expandable as required; machine with numerous cost-effective extension packages, custom-configurable for all requirements; Demag’s modular system readily permits retrofitting and upgrading
Economical: Up to 15% power savings due to mechanical locking technology; low energy and cooling water consumption; low first cost due to custom configuration capability
Safe: Active mould protection with envelope-type monitoring up to 800 tonnes (basic configuration); positive locking of System clamping unit with up to 10% reserve over nominal clamping force; computer-optimised lubrication
Ergonomical: Unified, freely programmable operator interface for all machines (NC4-control system); assists user from setting up to monitoring of process sequences; straightforward operation with process control, optimisation and data acquisition
Clamping unit
The System clamping unit with the short-length 5-point double-toggle provides fast, powerful movements and very sensitive slow-down during mould protection. Low-stress, uniform power transmission even where moulds are eccentrically placed is provided by the design of the moving platen with the links connected at the extreme outside and forces applied at an optimum angle. Two added advantages over full hydraulic machines: With 10 % locking force reserve above the nominal clamping force, the 5-point double toggle ensures positive locking of the mould. In addition, the mechanical locking system generated energy savings of up to 15%.
Drives
The powerful heart of the System machines from 5,000 to 20,000 kN clamping force is the variable pump system which – modular for each clamping force – is available in two rating levels for each size. High-precision pressure control, fast-response flow control, a high degree of reproducibility and harmonious movements characterise this drive design – any desired pressure/flow characteristic can be selected. Provision to move the ejector in parallel with the mould movement through the proportional valve is standard. And the electrical screw drive enables plasticising to take place simultaneously with mould movements.
Injection unit
The Demag modular building block of injection units provides excellent plasticising results and operating convenience: There is a choice of three injection units for each clamping unit, each with three screw cylinders made of wear-resistant bimetal alloy, as well as special screw geometries to process various types of plastic. And there is the quick-connect coupling which enables plasticising units to be exchanged in a minimum of time.