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Materials/Processes


also home to a large number of Arburg machines.


A high-performance machine such as


the hybrid all-rounders from the Hidrive series operating in the packaging industry might well complete 7.3 million production cycles a year. Needing to demonstrate the highest possible performance under these conditions, one of these high-tech machines might contain as many as 20 Trelleborg seals and guide strips.


T


raditionally, tumbling and grinding methods are used to remove flash, frequently leaving minute scratches on the surfaces of the seals which can act as leak paths.


Tests are currently being carried out with the new high performance Turcon M12 sealing material. To do this, Arburg machines that are in production at the Trelleborg Sealing Solutions facility at Stein am Rhein, Switzerland, are equipped with seals in the new material. “In this way we carry out our


testing together, under real production conditions,” explains Theodor Mack from Trelleborg Sealing Solutions. At Trelleborg’s Liquid Silicone


Rubber (LSR) competence centre in Stein am Rhein, Arburg’s green-and- yellow injection moulding machines dominate the central production hall. Wherever you look, the characteristic shudder of the hydraulic hoses and


Fast-cure PU polyurethane H


untsman’s new polyurethane (PU) resin system cures extremely quickly and allows the production


of high heat stable modelling, tooling and rapid prototyping boards.


The availability for the first time of


an effective, high temperature stable polyurethane will open up a world of new opportunities in a wide range of sectors. With a glass transition temperature (Tg) of 200˚C and higher, the new generation VITROX EST system offers product designers, tooling manufacturers and mould-


34 www.engineerlive.com


makers a viable polyurethane alternative to other thermoset-based tooling products – with a number of additional advantages. The fast cure features of Huntsman’s VITROX EST system make it possible to significantly reduce demoulding and manufacturing cycle times. This can help manufacturers increase productivity, reduce energy costs and cut carbon emissions. The VITROX EST system can also be precisely formulated to suit specific requirements – offering added flexibility and broadening scope for innovation.


VITROX EST system’s high Tg properties mean a constant coefficient of thermal expansion (CTE) from room temperature to 200˚C is achievable. This enables the creation of products and tooling boards with improved long-term stability when exposed to high temperatures. Products and tooling boards made with the VITROX EST system also demonstrate better impact resistance and a good machinability. n


For more information, visit www.huntsman.com


movement of the handling units indicate that production is under way. “Our production is fully automated,


and we have full confidence in the high efficiency of the Arburg machines,” says Jakob Bleiker, technical director of the Stein am Rhein facility. Seals made by Trelleborg are also component parts for Arburg’s new freeformer, which heralded a new era in plastics processing when it was presented at the K 2013 trade fair, the international trade fair for plastics and rubber. It is likely that it won’t be long before the first of this newest generation of machines takes pride of place in a Trelleborg facility.


A world premiere... Arburg’s world premiere of the freeformer moves an unprecedented success story in the field of injection moulding machines into a new, innovative process of additive manufacturing. The freeformer produces fully functional plastic parts using a new additive manufacturing technique – Arburg Plastic Freeforming (AKF) – from 3D CAD files, standard granulates and without a mould. It therefore offers boundless freedom for the efficient production of individual parts and small-volume batches. Trelleborg’s Turcon Roto Glyd Ring


and Turcon Roto Glyd Ring D120 are used as internal seals while a Turcon Roto Glyd Ring seals externally. n


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