08 - 10 November 2016 // Nuremberg

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Netstal present the ELION with hybrid drive concept. Typical applications, namely the manufacture of thin-wall flower pots and bottle caps, will be demonstrated on two new machines with respective clamping forces of 2200 and 2800kN.

The aforementioned requirement for an increased number of cavities has been achieved through an expansion of the clamping forces and greater tie-bar distances. As such, the distances are up to 20% greater than on conventional machines with comparable clamping forces.

The new performance data is also impressive. Even the dry cycles fulfil every need, with 1.3 seconds for the ELION2200 and 1.4 seconds for the ELION2800 setting new market standards. Injection performance, which constantly has to be first rate for the applications mentioned, is easily achieved with peak values of 1,100mm/sec for the 2000 injection unit and 1,400mm/sec for the 2900 injection unit.

Netstal’s philosophy has always been to use state-of-the-art technology to achieve the best possible levels of performance and energy efficiency. In the case of high-performance applications, which typically include thin-walled packaging and caps as well as high-precision technical parts and medical products, choosing a suitable drive concept is decisive. Thanks to the hybrid drive technology, the combination of an all-electric clamping unit and hydraulically driven injection unit creates optimum framework conditions. As a consequence, the ELION2200-2000 and ELION2800-2000 models being unveiled at the K trade fair use up to 30% less energy than conventional drives.

Expanded ELION clamping unit – established concept incorporating new innovations

Development of the new all-electric clamping unit with clamping forces of initially 220 and 280 tons, and subsequently 350 and 450 tons, has focussed on the tried and tested ELION toggle lever concept. The toggle lever is moved by an electric servo motor via a crankshaft. This technical layout ensures that force is applied centrally and guarantees maximum rigidity over the whole clamping unit. Expansive moving platen linear guides additionally contribute to a high level of stability and precision. This minimises mould wear even in the case of very fast cycles and long production runtimes, in turn ensuring a constant and high degree of precision.

As is standard at Netstal, all the structural components are designed to last throughout the entire service life of the machine, an aspect also supported by the long-established, closed-loop lubrication system for the clamping unit, which features permanent oil filtration. A lubricant-free mould installation area is therefore guaranteed, which also makes the larger ELION models perfect for use in clean rooms.

Also new is the flexible ejector layout. In terms of the new clamping units, the ejector can be powered electrically or hydraulically with various forces (standard, high force1, high force 2) depending on the application and requirements. In addition, so-called booster cylinders are available specifically for cap production that increase the ejector force by a further 100kN.

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