TPT September 2017

T E CHNOLOG Y

Cutting heavy ID scarf GEBRÜDER Lennartz GmbH & Co KG, based in Germany, specialises in the manufacture and supply of carbide-tipped circular saw blades for the ferrous and non-ferrous industry. It has now released another new product from the ECOmax family.

with a new proprietary coating – the ECOmax – Scarf saw blade is suitable for this application. This new design works successfully on single head machines as well as on twin saws with the simultaneous operation of two saw blades, to meet customer requirements and decrease the cost per cut. Successful trials and ongoing production usage, together with target customers and machine manufacturers, have shown the ECOmax – Scarf blades can achieve up to 7m of material removal on welded tubes with wall thickness up to 14mm. Gebr Lennartz GmbH & Co KG – Germany Website: www.heinemannsaw.com Website: www.lennartz.de

The ECOmax – Scarf circular saw blade is a new development and is customised for cutting tubes and profiles with heavy ID scarf on flying cut-off units. Previously conventional blades were damaged after only a few cuts because they cut the high strength weld bead inside the bottom of the tube. The service life of the blades was poor and the cost per cut was high, resulting in a cutting application that was not economical. Because of its special tooth form and cutting geometry – and in combination

Double synchronised cutting SICA recently patented a method for cutting plastic pipes that makes it possible to reach higher production rates (patent EP2008749). The machines are designed to cut and chamfer PP, HDPE and PVC-UP pipes performing simultaneous double cutting cycles automatically. new length sequences management system. Specifically, having entered the basic production parameters (extrusion speed, pipe diameter, capacity of downstream machines) the user can define the required production batches, automatically optimised by the system in order to exploit the machine’s potential to the full.

For example the Duet 125 automatic cut-off saw can reach hourly production rates of around 2,000 pipes of 150mm in length and sockets and more than 2,300 pipes/hour of 500mm length and sockets. The system also guarantees the necessary cut length precision (tolerance of ± 1mm) thanks to the machine’s CNC control system. This system allows perfect synchronisation of the cutting unit with the pipe extrusion speed and consequent exact positioning of the unit at the required cutting dimension. The machines are also equipped with specific anti-wear tools to guarantee high and enduring quality of the cutting/chamfering process. The logical control system also offers ‘on the fly’ cutting capabilities (Sica patent EP129515), optimising the use of the effective stroke to further increase output in terms of the number of cuts per hour. Equipped with an intuitive icon- based graphic interface and a classic production system for preset sequences of lengths, the machine also features a

Intelligent planning of production sequences, in addition to the availability of libraries in which process parameters and user product dimensions can be stored, result in versatility and ease of control. Given the large number of cuts that can be performed per unit of time, the machine has been equipped with an extra-powerful cyclone-type dust exhausting system. The range of automatic in-line planetary saws in the duet series (available in the Duet 125, Duet 160 and Duet 200 versions) includes the Duet/K (cutting with knife without material removal for HDPE and PPR) and Duet/C (cutting with chamfering unit and knife without producing chips inside the pipe) versions in addition to the standard model for PVC.

SICA SpA – Italy Email: info@sica-italy.com Website: www.sica-italy.com

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SEPTEMBER 2017