01/27/2015

www.gupta-verlag.de/rubber

Arburg to present multi-component technology at NPE2015

Five Allrounder injection moulding machines and two Freeformers will demonstrate sophisticated applications and innovative processes covering topics such as lightweight construction, multi-component injection moulding, automation and LSR processing. Five further Allrounder machines will be featured on partner stands.[image_0] As a multi-component application, Arburg will demonstrate the production of vacuum suction pads made from thermoplastic and liquid silicone (LSR). For this purpose, an electric Allrounder 570 A is equipped with two injection units in L-position and a 4+4-cavity mould from Rico. Thanks to its horizontal configuration, the Multilift Select robotic system is able to enter the clamping unit from above. It transfers the pre-moulded PBT parts to the LSR cavities and sets the finished parts down onto a conveyor belt. Four vacuum suction pads (used e. g. for moving bulky or heavy loads in handling equipment), are produced in a cycle time of around 40 s. Furthermore, Arburg will present a lightweight process: Using long-fibre direct injection moulding a side feeder incorporates the fibres in the liquid plastic melt. The advantages of this process include flexibly adjustable fibre lengths of up to 50 mm, a low incidence of fibre damage in the plastic melt and cost advantages compared to fibre-reinforced standard granulates. The process will be demonstrated on a hydraulic Allrounder 820 S, operating with a mould from Georg Kaufmann Formenbau. Through the overmoulding of continuous-fibre reinforced thermoplastic inserts (organic sheets), high-strength, resilient composite parts are created, which weigh less than 200 g at a length exceeding 500 mm. A six-axis robotic system picks up two organic sheets of different thicknesses from a magazine. The flat inserts are gently heated, process-reliably, using a new technology in the gripper system and transferred to the LIPA (Lightweight Integrated Process Application) mould at a precise forming temperature. Here, forming of the inserts and injection moulding of the functional and reinforcement elements are performed simultaneously in a cycle time of around 55 s. With two Freeformers, Arburg will demonstrate how fully functional plastic parts can be additively manufactured from standard granulate using the Arburg Plastic Freeforming process based on 3D CAD data, without a mould. As with injection moulding, the granulate is first melted in a plasticising cylinder. Plastic droplets are applied layer-by-layer onto a moving part carrier via the nozzle of a stationary discharge unit by means of high-frequency piezo technology at a specified duty cycle of 60 to 200 Hertz. The second discharge unit can be used for an additional component in order to produce, for example, a part in different colours, with special tactile qualities, or as a hard/soft combination. At the NPE, a Freeformer will combine an elastic standard TPU material with a special support material - a first in additive manufacturing. Possible applications include e. g. bellows, hoses, sleeves, or flexible components for robotic grippers. The supporting structures can subsequently be removed in a water bath. In addition, Arburg will demonstrate its practical capabilities with regard to the topical subject of Industry 4.0 using an electric Allrounder 370 E, based on the example of a toy buggy. The Arburg host computer system (ALS) is of central importance here, networking various independent stations, recording all the parameters and transmitting them to a web server. First of all, a personalised chip card is read in by the Selogica control system of the production cell. During the following cycle, the corresponding buggy is injection moulded and an individual code is applied onto its roof by laser. A linear Multilift Select robotic system performs handling and assembly of the buggy, and removes it from the machine via a chute. Next, the toy car can be checked, e. g. for correct operation. The code on each individual buggy can be read out using a mobile device. It leads to a part-related web page containing all the process data for the moulded part. All the work steps are seamlessly documented, error-free. This ensures transparent, 100 % traceable production. At the trade show, Arburg will also be exhibiting an injection moulding machine in the "Packaging” version especially designed for the packaging industry. The hybrid Allrounder 630 H (P) has been specially configured for thin-wall applications. It produces four round lids per cycle, made from a transparent PP with a label from Verstraete IML that is printed on both sides. The mould was built by the Canadian partner Stack Teck and an IML system from Yudo is used for the automation. The cycle time is around 4 s. At the NPE 2015, Arburg will also exhibit a representative of its electric high-end Alldrive series. The GMP-compliant, stainless steel Allrounder 520 A machine version uses a high-performance mould from Tanner to produce 64 pipette tips in a cycle time of around 4.8 s. For removal, a Hekuma robotic system is used. Arburg at NPE2015, West Hall, stand W3729

www.gupta-verlag.de/rubber