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  • Arthur-Hehl-Straße
  • 72290 Loßburg
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  • Susanne Palm
  • +49 (7446) 33-3463

Electric Allrounder A machines lend speed and precision to LSR production

O-ring production on electric Allrounder 470 A with servo-electric demoulding device / Cycle time of 10.6 seconds for 128 parts

(PresseBox) (Loßburg, ) Generally speaking, what is understood by the term 'LSR production' the is highvolume manufacturing of moulded parts made from liquid silicone, utilising the full available potential for cycle time reductions. With the production of Orings, Arburg demonstrates a machine configuration which meets all these criteria to the maximum possible extent.

A total cycle time of 10.6 seconds for 128 Orings is an achievement which stands up to any comparison. This is made possible through the combination of a fast, highprecision electric Allrounder 470 A with a clamping force of 1,000 kN and a size 170 injection unit, as well as a servoelectric demoulding device. The Orings made from LSR have a part weight of 0.12 grams, an internal diameter of 8.5 millimetres and a thickness (= cord thickness) of 2 millimetres. Each ring is injected directly via cold runner nozzles in an optimised manner to reduce material waste. The servoelectric clamping unit of the Allrounder A enables fast, highly dynamic, as well as precise mould positioning in order move effectively to the vacuum and demoulding positions. This results in reduced cycle times.

Servoelectric demoulding device yields cycle time advantages

The servoelectric, directly driven demoulding device has been specially adapted for use during LSR injection moulding production. Because all the movements are driven via servo motors, the extension and retraction movements in particular are performed energyefficiently, reproducibly, fast, highlydynamically and with extremely short intervention times. Thanks to individual programming of start/stop conditions in conjunction with the mould movements, the intervention time and consequently the cycle time are additionally minimised. In special application cases, servoelectrically driven, doublesided, rotating aluminium brushes are used, which can, for example, be driven to each travel position with changeable rotation speeds for gentle demoulding. Owing to its emissionfree drive system, which prevents air turbulence, the demoulding device is as wellsuited to highly dynamic applications as it is to the production of medical technology items and clean room applications. Its compact design allows the demoulding system, which is mounted on the mould, to be readily customised. Depending on the requirements, it can be flexibly equipped with an ejection unit or applicationspecific grippers or suction modules.

Complete integration in the Selogica control system

The servoelectric demoulding device can be fully integrated in the Selogica machine control system. The three servoaxes of the device are treated as additional machine axes by the Selogica system. This allows the machine operator to program the entire system in the familiar manner via the central Selogica control system. Thanks to the synchronised movements and easy data entry for positions and speeds, the process can be flexibly optimised and cycle times reduced. Short setup times are ensured through the storage of all setting parameters for the demoulding device in the machine data record for the relevant application.

As the LSR application demonstrates, the electric Allrounder 470 A 1000-170 in conjunction with the servoelectric demoulding device is predestined for applications requiring highprecision operation with short cycle times, energyefficiency and minimal emissions. A configuration of this type is perfectly suited, for example, to production for the medical technology sector or for clean room production.


Arburg, a German machine construction company, is one of the leading global manufacturers of injection moulding machines for plastics processing with clamping forces between 125 kN and 5,000 kN. Fields of application include the production of plastic parts for motor vehicles, communications and consumer electronics, medical technology, domestic appliances and packaging. The product range is completed by robotic systems, complex projects and other peripherals. Arburg's operations are coordinated by an integrated management system and are DIN EN ISO 9001 and 14001 certified. Arburg is represented by its own organisations in 24 countries at 32 locations and by trading partners in more than 50 countries. However, production takes place exclusively in the parent factory in Lossburg (Germany) - with the mark of quality "made by Arburg - made in Germany". From a total of more than 2,000 Arburg employees, around 1,700 work in Germany. About 330 further employees work in Arburg's organisations around the world.

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