Arburg will display more than ten exhibits on its stand in Hall 13, Stand A13 at K this year. The electric Allrounder 820 A, which completes the high-end electric Alldrive series will make its world premiere in Düsseldorf. Both the 4,000 kN toggle-type clamping unit and the size 2100 electric injection unit have been developed for this machine. Arburg says that with these developments, the gap between 3,200 and 5,000 kN in the electric clamping unit range has been closed. The same applies to the hybrid Hidrive range, for which this new toggle size will also be available in future. With the new clamping force and injection unit sizes for electric machines, there is now greater modularity in the range.
In automation, Arburg will team up with fpt Robotik to display an Agilus six axis robotic system from Kuka with integrated Selogica user interface. The system is suspended from a linear axis arranged transversely to the machine. The combination of a six-axis robotic system with a linear axis is said to permit more dynamic movements and faster entry into the mould. The small robotic system can move on its axis and the floorspace below can be used without restriction. It is designed for load weights between 6 and 10 kg.
The automation display will be in operation on a two-component Allrounder 470 S, which will be demonstrating particle-foam composite injection moulding (PCIM). A plastic wheel rim will be injected onto a particle-foam tyre. Transfer of the pre-moulded part to the mould will be followed by overmoulding of the tyre with TPE. The six-axis robotic system will be used for all handling tasks, from insertion of the foamed tyre through to transfer of the finished parts to the packaging system, which includes printing of the bags during the process.
The group will also be presenting long-fibre direct injection moulding. Glass fibres at 50 mm in length can be added directly to the liquid melt, where they are homogeneously distributed. The fibre length, fibre content and material combination can all be adjusted.
The process will be demonstrated on an ‘energy-optimised’ hydraulic Allrounder 820 S with servo-hydraulic drive, operating with a mould from Georg Kaufmann Formenbau AG.
Through the overmoulding of continuous-fibre reinforced thermoplastic inserts (organic sheets), high-strength, resilient composite parts are created, which weigh less than 300 grams at a length exceeding 500 mm. The continuous fibres – generally glass, carbon and aramide in woven and non-woven forms – determine mechanical properties such as strength and rigidity. The matrix material is responsible for the force transfer between the fibres in the composite, and protect the reinforcing structure from buckling and environmental influences.
In this application, a six-axis robot will pick up the organic sheets from a magazine. These will be heated and transferred to the LIPA (lightweight integrated process application) mould at the forming temperature. Here, forming of the insert and injection moulding of the functional and reinforcement elements such as edging, end eyes and ribbed structures will take place simultaneously in a cycle time of around 40 seconds.
Also on display will be a fully-electric cube-mould application for the production of juice container closures, which will be presented with Foboha. On the electric two-component Allrounder 720 A with a clamping force of 3,200 kN, the large size 800 injection unit will be arranged horizontally. The small size 400 injection unit is arranged horizontally and on the moving mounting platen of the machine. In this application, fully electric means that both rotation of the cube and the linear sliding motion of the 12+12-cavity mould are driven electrically.