TPT January 2010

T echnology U pdate

Sawing technology LINSINGER Austria is a manufacturer of large carbide circular sawing machines and also has its own tool production, allowing the company to offer tools and machines from one source. To simplify repairs and maintenance, and to reduce standstill times of the sawing machines, Linsinger also supplies turnkey grinding centres that allow the user to regrind and reassemble used carbon tips saw blades. For the sawing of continuous casting billets or ingots, Linsinger specialists combined the benefits of vertical and horizontal technology, to create the inclined- bed circular sawing machine. Claimed advantages of this machine include better machine stability, longer tool life, and the processing of material rigidities up to 1,400 N/mm². The machine is designed for three- shift operation, and can cut work pieces up to 630mm. Linsinger’s circular sawing machines for the cutting of tube layers are developed using themost modern vibration technology, and are designed for heavy three-shift operation. Tubes with material rigidities up to 1,400 N/mm² can be cut. Linsinger, as general supplier, also provides the necessary transport systems, length measuring stops for head, tail and section cuts as well as additional clamping devices for layers, and can create turnkey solutions including integration to existing finishing lines. The company’s Multicut saw is fitted with two to four axle-controlled sawing stations, working independently. Sawing of the tube starts simultaneously at several positions, and segments are cut along HDPE pipes from Greek manufacturer POLIECO Hellas AEBE, an affiliate company of the Polieco MPB Srl group, was established in Athens, Greece, as an industrial producer and trader of HDPE structured wall pipes, in order to supply the Greek and the Balkan area market. Production consists of a wide variety of pipes, produced in either rolls or bars from 40 to 1,200mm OD, along with fittings, manholes and jointing kits for any kind of installation. The Polieco Group’s products can be divided into four categories: cable conduits in HDPE, for the protection of electric and telephone underground cables; drainage pipes in HDPE, for artificial drainage of

Linsinger offers circular sawing machines and has its own tool production plant

its circumference. The saw uses small, coated one-way saw blades with a high number of cutting teeth, resulting in less burden on the blade and increased tool life. Additionally, small chips with negligible burr formation are generated. The coated saw blades allow delicate material qualities to be cut. The machine features a quick tool change; if one sawing unit is stopped, the remaining units continue working until the scheduled tool change. The axle control also allows square and rectangular tubes to be cut. Linsinger’s strip edge milling machines, for longitudinal seamless ERW tube mills, were designed for welding edge preparation with high accuracy, using vertical and cross copying milling units. The cross copying milling unit compensates the strip sabre. The fully developed milling concept is significant for high cutting performance and minimising of tool costs. The milling ground field; sewage pipes in HDPE, for sewage systems; and manholes and special fittings. The company’s twin-layer cable conduit, an HDPE pipe for the protection of electric and telephone underground cables, is made of two coextruded layers: the outer wall is corrugated to assure greater resistance to deflection and flexibility, while the inner wall is plain, to ease cable insertion and slipping. The company’s drainage range also includes Drenosewer, a slotted HDPE pipe with a corrugated external wall and a smooth internal wall. The pipe is available in coils of diameter from 110 to 200mm, and has a resistance to compression higher than 450N, with a deformation of the external diameter equal to 5%.

units can also be applied with profile milling tools. The Linsinger double strip edge milling machine is provided for integration in spiral tube lines with point welding. A significant advantage is the breakdown strategy, as milling is possible with only one milling station, while the tools of the second milling station are automatically changed. The double milling technology increases line speed and achieves high removal rates. In large tube mills, the Linsinger plate edge milling machine is used for preparation of welding edge profiles, and is operated with vertical copying milling units. The company’s pipe bevelling machine enables simultaneous bevelling of both tube ends. Linsinger Maschinenbau GmbH – Austria Fax: +43 7613 8840 951 Email: maschinenbau@linsinger.com Website: www.linsinger.com Drenopal slotted HDPE pipe is available in diameters from 160 to 1,200mm OD, in 6m pipes, and according to the stiffness classes SN 4kN/m², SN 8kN/m² and SN 16kN/m 2 . Ecopal HDPE corrugated sewage pipe is used in underground sewer ducts not under pressure, and is manufactured in compliance with the EN 13476type B standard, stiffness class corresponding to SN 4kN/m 2 or SN 8kN/m 2 . The pipe is produced in 6 or 12m bars, with jointing by a PEAD coupling and EPDM lip seal, and is available from 160 to 1,200mm diameter. Polieco Hellas AEBE – Greece

Fax: +30 210 6669628 Email: info@polieco.gr Website: www.polieco.gr

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J anuary 2010

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