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ALUMINIUM ROLLING INDUSTRY Alro commissions new cold finishing lines supplied by Salico Aluminium producer and manufacturer Alro SA has started operation of its newly built cold finishing facilities at its rolling plant in Slatina, Romania. The €10 million (RON43.6m) investment is aimed at increasing the mill’s productivity and thus strengthening its international competitiveness. The project, which was started in March 2011, comprises tension levelling, cut-to-length and slitting lines. The company is majority owned by the globally integrated aluminium group Vimetco. The new finishing facilities in Slatina include state-of-the-art tension levelling, cut-to-length and slitting lines, all of them supplied by Salico. The lines process aluminium strip, mainly 5xxx alloys, in widths up to 1,650 mm and a thickness range from 0.3 to 6.35 mm. The new equipment has been in operation since mid-September and has met all performance and capacity requirements. With the new lines, Alro will be able to offer a wide range of strip thicknesses between 0.3 and 300 mm covering all products from sheet, coil, slits, shapes and plate. It has a production capacity of 120,000 tpy of finished products. Tension levelling line The centrepiece of the new equipment, the tension leveller unit, features an ‘all electric’ drive system for the tension bridles with a non-contact laser speed measurement system and a heavy-duty cassette leveller as the main components. Eccentric rotary shear – ‘sheet tronic’ Tension levelling section An intelligent arrangement of the cluster of rolls of each cassette minimises friction for the thinnest materials. At the same time, it offers adequate stiffness to process heavier thicknesses of hard alloys, and together with an automatic disconnection system for the bridle rolls this allows a very large range of strip thicknesses to be processed. The line is equipped with an automatic spool handling system, edge trimming section, double-die Salico stitching machine and an inspection stand. Particular effort has been devoted to the design of the roll-cleaning systems, with motorised cleaning devices for the entry and exit deflector rolls and all the bridle rolls, as well as an advanced lubricant spraying device for the elongation and levelling sections of the leveller. Cut-to-length line The cut-to-length line cuts the entry coils into sheet up to six metres in length at a maximum speed of 80 m/min. The main components are a multiroller leveller, paper and plastic application devices, an eccentric rotary shear and a vacuum stacker. The leveller ensures that the cut sheets have the proper flatness, with a maximum of half the tolerance permitted by the relevant European standard. Preparation of the interleaving paper is carried out easily and ergonomically by the operators offline. Feeding the paper into the line and under the aluminium strip is accomplished fully automatically without intervention of the operator. The eccentric rotary shear is the patented Salico ‘sheet-tronic’ shear, which has been sold worldwide more than 200 times. A highly dynamic and well balanced unit allows the sheet to be cut with a high degree of accuracy: the tolerance is less than 0.2 mm at the highest speed with up to 160 cuts per minute. The shear also features a camber-compensation system that permits angular adjustment of the complete unit in order to cut within the tolerance even when the strip has a severe camber defect on entry. Stacking is accomplished using a zero-inertia vacuum stacker based on a concept introduced by Salico many years ago. It is performed when the sheets are not moving: the stacker belts are stopped at the very moment when the stacking position has been reached. This approach allows the cut sheets to fall vertically onto the packing without any risk of slippage, and therefore without any surface damage even with the softest and most sensi- © Salico 46 ALUMINIUM · 11/2013
SPe CIAL ALUMINIUM ROLLING INDUSTRY Entry section of the slitting line tive materials at maximum line speeds. The plant layout has been designed in such a way that the cut-to-length line and the tension-levelling line can be operated together or as stand-alone units. mainly by the wrap force over the strips around the electrically braked bridle rolls; this avoids scratches and other surface damage. Special attention was given to minimising line downtime: specific solutions have been provided for fast unloading of the spools, providing slitter heads capable of performing test cuts offline, changing the heads automatically and offline strapping capabilities over the exit turnstile. ■ Slitting line The main equipment of the slitting line has to perform the cutting and back-tensioning. Slitting is carried out using two interchangeable slitter heads equipped with the proprietary Salico high-pressure tooling-locking system, which continuously applies an axial pressure of up to 25 MPa (250 bar) in order to ensure that there are absolutely no gaps between the knives and the spacers. Coupled with the fact that the strip is under tension because of the pulling rolls located after the slitter head, this ensures optimal cutting quality. It is possible to apply lubrication continuously to avoid pick up of aluminium particles on top of the knives. The proprietary Salico tensioning bridle even provides back-tensioning of the slit cuts before recoiling. In contrast to the vertical tension rolls or felt pad systems traditionally used, tension is applied progressively here, Gheorghe Dobra, CEO of Vimetco, and Jose M. Gerboles, CEO of Salico Group, celebrating the successful completion of the Alro project with project team members ALUMINIUM · 11/2013 47
Page 1 and 2: © Achenbach SMS Meer Special: alum
Page 3 and 4: editorial Volker Karow Chefredakteu
Page 5 and 6: Contents Advanced casting research
Page 7 and 8: NeW s IN B RIef european Aluminium
Page 9 and 10: NeW s IN B RIef senaat and Ducab in
Page 12: W IRtsCHAft Produktionsdaten der de
Page 15 and 16: eCoNoMy structural and chassis comp
Page 17 and 18: eCoNoMy lysematerial erweitert Trim
Page 20 and 21: economy 40% ownership of Awac), Hyd
Page 22 and 23: economy the engine and wheel market
Page 24 and 25: economy In the limelight - the Arab
Page 26 and 27: ALUMINIUM RoLLINg INDUSTRY Rusal -
Page 28 and 29: ALUMINIUMwALzINDUSTRIE KunShan Alum
Page 30 and 31: ALUMINIUMwALzINDUSTRIE Betreiberman
Page 32 and 33: ALUMINIUM RoLLINg INDUSTRY Ort für
Page 34 and 35: ALUMINIUM RoLLINg INDUSTRY Siroll A
Page 36: ALUMINIUM RoLLINg INDUSTRY Kobe Ste
Page 39 and 40: SPe CIAL ALUMINIUM ROLLING INDUSTRY
Page 41 and 42: SPe CIAL effizienz zu steigern als
Page 45: SPe CIAL ALUMINIUM ROLLING INDUSTRY
Page 51 and 52: Novelis PAE Expert in Casthouse Equ
Page 53 and 54: SPe CIAL ALUMINIUM RoLLINg INDUSTRY
Page 55 and 56: The difference between ordinary and
Page 57 and 58: SPe CIAL ALUMINIUM RoLLINg INDUSTRY
Page 59 and 60: TeChNoLogY Advanced casting researc
Page 61 and 62: A PPlicA tion Ball Packaging bringt
Page 63 and 64: coMPAny news worldwide Aluminij pro
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Page 67 and 68: PAtente Patentblatt september 2013
Page 69 and 70: suppliers directory 1.4.1 Anode bak
Page 71 and 72: suppliers directory 1.14 Aluminium
Page 73 and 74: suppliers directory ernSt reinHArdt
Page 75 and 76: suppliers directory 3.4 Hot rolling
Page 77 and 78: suppliers directory SMS Siemag AG s
Page 79 and 80: suppliers directory 4 Foundry Gieß
Page 81 and 82: suppliers directory Gautschi engine
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