The hybrid Allrounder 1020 H Packaging is the largest injection-molding machine that Arburg, Lossburg, Germany, has ever built specifically for packaging applications. Designed for high-cavitation molds and containers with volumes of up to 30 liters (8 gallons), it has a clamping force of 6,000 kN (660 tons) and is equipped with the new larger injection unit.
The new high-performance hybrid machine combines electrical speed and precision in the clamping unit with the hydraulic power of the injection unit. At the recent K 2019 trade show, it was shown producing round thin-walled PP cups (part weight 13 grams) in an 8+8-cavity stack mold. Cycle time was 4.3 seconds.
The new size 7000 injection unit offers a maximum shot weight of around 4,200 grams (148 ounces) (PS). A servo-electric dosing drive ensures fast shot building, simultaneous with other machine operations, for maximum productivity. Barrier screws ensure homogeneous melt preparation and a high material throughput.
Hydraulic accumulator technology increases injection speed. Screw speed and position are actively controlled throughout the cycle. Active acceleration and deceleration enables the short injection times that are required in the packaging sector. If production sequences need further optimization, injection can be started simultaneously with the “mold closing” movement as standard.
The 6,000 kN (660-ton) clamp of the Allrounder 1020 H Packaging has also been optimized to meet the requirement for large-format packaging tooling. The distance between tie bars is 1,020 millimeters (40 inches) and the mold-opening stroke creates up to 2,100 millimeters (83 inches) of daylight.
The servo-electric toggle-type clamp design facilitates extremely fast opening and closing movements, leading to shorter overall cycle times. Dry-cycle times can be as low as 2.3 seconds. At the same time, energy recovery during braking ensures that the energy applied is used even more efficiently. Energy savings totaling up to 30% can be achieved in comparison with hydraulic clamping systems.
The torsionally rigid, longitudinal steel machine base-supports accommodate heavy mold weights and compensate for high load changes during high-speed movements. The FEM-optimized mounting platens combine the necessary rigidity with low weight.
For more information, visit www.arburg.com.