WCA March 2007

Wire Drawing Machinery

controlled rod breakdown machines type MSM85. As each capstan is individually driven, for each draft different wire elongations can be realised in a wide range. In the same way slip on the drawing capstans can be reduced to a minimum, resulting in wires with an especially high surface quality. Some aluminium wire producers are using lines, which consist of a type MSM85 machine connected with a type RA501 continuous annealer. Both types of drawing machines are modular-built in 1-wire and 2-wire- versions and can work with a speed up to 40m/s. More than six years ago, Niehoff delivered the first medium- wire drawing line (an MH120 drawing machine with an RA200 annealer) for the simultaneous production of two wires made of pure aluminium and around 30 different aluminium alloys with a starting diameter of 2 x 1.4mm and a final diameter of 0.01mm to 0.50mm.

Specialists for the construction industry

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Based in Italy, Tecno Impianti specialises in the supply of wire drawing and cold rolling lines for the construction industry. The smooth or ribbed wire which is taken-up on the spoolers installed at the end of the lines is used for the production of welded mesh and lattice girders. The standard lines are composed of: vertical un-coiler with two tilting arms for permitting the welding operation between the coils’ ends without stopping the line, mechanical descaler, lubricant dispenser, vertical or horizontal bullblock and vertical or horizontal spooler. All machines are equipped with variable-speed drives and AC motors. Customer specifications can also be met and, depending on whether the customer utilises dies or rolls for the wire diameter reduction, the bullblock can be equipped with drawing die-boxes or also with rolling cassettes, which permit higher working speeds. The bullblock can be equipped with a single or double-pass capstan, the line can be supplied with two horizontal or vertical bullblocks and the reduction passes can be one, two or three. Wire can be taken-up on fixed reels if the wire goes directly to the production department or on collapsible reels in the event that it goes to stock or is sold, in the form of bound coils. Vertical spoolers can also be supplied with a double reel configuration, allowing the reduction of down-times needed for reel changes. Tecno Impianti Srl – Italy Fax : +39 0341 604289 Email : info@tecnoimpianti-italy.com • Website : www.tecnoimpianti-italy.com A cold rolling line from Tecno Impianti ▲

Range of metallic reels

The MMH104 is combined with an RMA201 type continuous electrical resistance annealer with individually driven contact pulleys working with a protective atmosphere. The modular MKN101 super-fine wire drawing machine completes Niehoff’s range of drawing machines. This precisely engineered machine is designed for the production of wire to a final finish diameter of 0.014mm. The MKN101 is based on a compact concept that enables extreme flexibility and scalable configurations. Each pair of cones forms a separate module, which can be combined with others to create an 11, 15, 21 or 31-draft machine available either with or without a final capstan. This machine is used to draw wire made of copper and copper alloys as well as precious metals and aluminium alloys for a variety of applications, including the highly demanding medical and electronics industries.

The MSM85 type rod breakdown machine

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The MMH type multiwire drawing machines with an integrated RM continuous annealer for copper wire are now built to draw up to 42 wires simultaneously with line speeds of up to 40m/s. The wires are characterised by highly uniform properties meeting or exceeding the highest specifications and processing requirements. Features of the machines are special die holders with an integrated drawing capstan spray system which are tailor- made for the specific requirements of aluminium wire drawing. The drawbox can be operated either with drawing oil or drawing emulsion.

Since 1967 Italy’s OML has been producing metallic reels for the wire and cable industry. They offer a wide range of reels, standard (fully maintained, press steel flanges, etc.) and collapsible, but they can also produce reels made to customer specifications.

Aluminium wire over the drawing capstans

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One of OML’s metallic reels

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Production is regulated by CAD-CAM proceedings that allow the control of all machines and guarantee the process and quality.

Maschinenfabrik Niehoff GmbH & Co KG – Germany Fax : +49 9122 977 55 Email : info@niehoff.de Website : www.niehoff.de

OML Srl – Italy Fax : +39 0575 89071 Email : info@omlbobine.it Website : www.omlbobine.it

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Wire & Cable ASIA – March/April 2007