Arburg
The Allrounder 570 H.Arburg has launched its new “Packaging” version for the electric and hybrid Allrounder Alldrive and Hidrive machines.
The Allrounders 570 A and H feature a clamping force of 1,800 kN, Allrounders 630 A and H 2,300 kN, Allrounders 720 A and H 2,900 kN, Allrounders 820 A and H 3,700 kN and Allrounders 920 A and H 4,600 kN.
The rigid, longitudinal steel machine base supports reportedly accommodate heavy mould weights and compensate for high load changes during mass movements. The FEM-optimised mounting platens combine the necessary rigidity with low weight. Together with servo-electric toggle-type clamping units, this facilitates fast opening and closing movements, leading to shorter overall cycle times. At the same time, energy recovery during braking ensures that the energy applied is used more efficiently. Energy savings of 30% can be achieved in comparison with hydraulic clamping systems.
Servo-electric dosage drives offer fast operation across cycles, short dosage times and maximum productivity. The use of barrier screws ensures homogeneous melt preparation and a high material throughput. Injection involves either servo-electric or hydraulic accumulator technology via position-regulated screws. With a “dynamic filling process”, active acceleration and deceleration is possible. Together with higher injection speeds of up to 500 mm/s, this enables the short injection times which are required for packaging applications. If production sequences need further optimisation, injection can be started simultaneously with the “mould closing” movement as standard. Once again, the aim here is to reduce the cycle times in order to achieve high productivity in manufacturing.
For the production of thin-walled items and screw caps, special features are available which enable the Allrounders to be adapted to the particular application.
Equipment for producing thin-walled items includes preparations for connecting an external in-mould labelling system or other removal system. In addition, the extension of the robotic system interface enables the robotic system to advance as the mould opens.
For screw-cap production, a servo-electric ejector with hydraulic booster function is available. This reduces problems during demoulding, even with shrunk-on closures.
Dropping of the moulded parts can be adjusted with precision to keep the mould opening times short. Higher screw circumferential speeds enable correspondingly short dosage times.