Three performance variants for optimal adaptation"The Comfort, Premium and Ultimate performance variants of our hybrid Allrounder are optimally adapted to their respective requirements," explains Guido Frohnhaus, Managing Director Technology & Engineering at Arburg. "This new generation of machines incorporates many technical innovations that are only available from Arburg. These include a new oil management concept, flow rate splitting and extended use of the Arburg servo hydraulic system."
- The new Allrounder 470 H Comfort machines are intended for technical, thick-walled or relatively simple moulded parts that are typically manufactured in cycle times of 10 – 45 seconds. Compared to an equivalent hydraulic machine, the energy footprint of this performance variant is up to 50% better, while the cooling water and oil requirement is reduced by up to 35%. At 1.4 seconds, the dry cycle time is also around 30% shorter. A robust ball screw is used for the drive.
- The Premium performance variant is further optimised in terms of production efficiency, achieving a dry cycle time of 1.2 seconds. This machine can be used for a variety of demanding applications, such as manufacturing precision components for the automotive and electronics industries. Its standard equipment includes a planetary roller screw drive and the Arburg electro-mechanical dosage (AED) function for a longer dosage time. In addition, the machine features Arburg’s new flow rate splitting for simultaneous, independent movements of two hydraulic secondary axes.
- For its part, the Ultimate performance variant is specifically designed for demanding, high-speed processes, such as thin-walled applications in the packaging technology industry. At 0.9 seconds, its dry cycle time is significantly shorter than that of the Premiuim performance variant. The standard equipment for Ultimte machines also includes AED as well as hydraulic accumulator technology and the Gestica control system with the aXw Control ScrewPilot function, which compensates for disruptions in the filling process and stabilises mould filling. All together, this provides for a level of injection precision equivalent to that of an electric injection unit. Dosage across cycles is also possible (optional feature).
To enable simultaneous movements of two secondary axes (1 and 2) using ASH technology, Arburg developed flow rate splitting.
Reduced energy requirement thanks to the Arburg servo hydraulic systemThe Comfort and Premium performance variants are equipped with the Arburg servo hydraulic system (ASH). With this technology, the drive system adjusts continuously to the actual power requirement thanks to a speed-controlled, water-cooled servo motor. One major advantage of this is that when the machine is at a standstill, the pump drive also stops, meaning no more idling losses. This ensures energy-efficient, low-emission operation and yields up to 50% energy savings, particularly for processes with long cooling times. Depending on the specific application, the Allrounder 470 H Comfort can save up to 12,000 kg of CO2 per year. At the same time, the machine’s cooling requirements and noise level are also significantly reduced.
Flow rate splitting reduces cycle timesAs only serial movements can be performed with ASH technology alone, Arburg developed flow rate splitting to enable simultaneous movements. This function is integrated into the Premium performance variant. Thanks to the latest Varan valve technology with integrated sensor system, two hydraulic secondary axes can be driven independently at the same time, for example core pull and ejector during mould opening. The axes split the ASH servo pump’s available flow volume if required. The benefit is twofold: greater energy and production efficiency overall. This is because the machines consume significantly less energy and the cycle times are shorter. All this is possible without a hydraulic accumulator or multi-pump technology requiring a second servo motor and additional frequency converter.
High injection speedsThe Ultimate performance variant of the hybrid Allrounder meets the highest requirements in terms of dynamics and process capability thanks to its hydraulic accumulator technology. All axes of motion can be independently controlled and driven by means of separate control valves. The hydraulic accumulator ensures a consistent pressure level. The result: quick, dynamic simultaneous movements and more process setting options, such as injection during mould closing or embossing.
The hybrid Allrounder machine in the Ultimate performance variant can reach injection speeds of up to 450 mm per second. "In the future, Ultimate machines will even be able to reach speeds of 550 mm per second, achieving accelerations of up to 1 G," says Guido Frohnhaus proudly.
The Premium performance variant of the hybrid Allrounder 470 H has a precise clamping unit with planetary roller screw drive and an injection unit comprising the Arburg servo hydraulic system (ASH).