TPT July 2014

Technology News

6th All Indian Exhibition & Conference for the Tube and Pipe Industries

Heavy-duty granulating in one step

2014 28 – 30 October Bombay Convention & Exhibition Centre Goregaon (East), Mumbai, India

HERBOLD Meckesheim GmbH has overhauled the construction design of the SMS series, to allow the machines to cope with the most demanding heavy-duty applications in a single step. The machines are manufactured with rotor widths ranging from 600 to 2,000mm and with drive capacities between 45 and 315 kW. The knife design is segmental, ensuring a quick and easy exchange of the cutting tools. Typical applications are heavy, thick-walled semi-finished products in PE, PP, POM and PA, pipes with high wall thicknesses and large purgings. Thick-walled materials are not the only materials that are quite difficult to recycle; the same applies to aramid fibres (commonly used for manufacturing bullet-proof vests), carbon fibres and composite materials, labelled as ‘difficult to grind’.

SMS 45/60 heavy-duty model

Among the different applications, one consideration is contaminated plastic waste that is highly abrasive, and if the machine is operated with blunt knives, this means a high strain for the rotor and the housing. Cracks and fractures have to be avoided during a harsh, non-stop operation. There is often not enough space to install a two-step solution. Another aspect is the limited capacity of a preliminary size-reduction unit. The quality of the ground material is often deteriorated if a shredder has been used first. The thin-walled flakes do not have good flow properties and no good bulk density. A one-step size-reduction solution allows small batch sizes with an important cleansing process. A rotor that has been forged as one single piece ensures stability. Welding seams cannot break since they do not exist. The rotor knives cannot shift since they have been fixed at a stopper. This design is also an advantage for cleaning operations, as there are no ‘dead spots’ where material rests can deposit.

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WELDING CUTTING

&

Messe Düsseldorf GmbH P.O. Box 10 10 06 _ 40001 Düsseldorf _ Germany Phone +49 (0) 2 11/45 60-77 62 _ Fax +49 (0) 2 11/45 60-77 40 SchreiberG@messe-duesseldorf.de www.messe-duesseldorf.de

Herbold Meckesheim GmbH – Germany Fax: +49 6226 932 495

Email: herbold@herbold.com Website: www.herbold.com

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23.05.14 09:01