EoW July 2013

News Technology

Cost-effective high technology

length

of

10,000mm,

Eurolls SpA, a leader in the field of steel rolling mills and rolling micro-cassettes for the production of round and shaped steel wires, thanks to the evolution of Team Meccanica machinery, has played an important part among manufacturers of drawing systems and treatment lines. Eurolls has committed itself into the development of the engineering sector, through which it offers complete production lines, fully developed in-house, with its own technologies and following criteria of high technological content, low environmental impact and extreme flexibility. The bead wire production line is the high resistance steel wire used to reinforce the ‘heel’ of tyres, in other words, the rubber ring that links the tyre to the rim. This wire usually has a diameter between 0.78mm and 2mm and is made of high carbon steel (0.7-0.9%) coated by a deposit of bronze (0.4-1g/kg) that guarantees an excellent adherence between steel and rubber compound. The installed line has a net production capacity of 20,000 tons/year on average diameter of 1mm and works with 20 wires simultaneously, even with different diameters and speeds.

with and

electric

heating

interchangeable,

removable panels; insulation of the tank with 300mm thick glass-ceramic refractory; insulation of the surface with hard, lifting sheets made of vermiculite and thickness of 100mm

3. Cooling tank in water with temperature control 4. Electrolytic pickling in sulphuric acid with nine plates, 3,000A/10V 5. Four-stage washing with dynamic and mechanical cleaning systems 6. Electrolytic activation in sulphuric acid with six plates, 1,000A/10V 7. Three-stage washing with dynamic and mechanical cleaning systems 8. Bronzing unit in two independent sections, ten wires each, with the possibility to use different washing compositions 9. Three-stage washing with dynamic and mechanical cleaning systems 10. Hot washing (90°C) with final tank for protective and antioxidant bath 11. Drying tunnel in hot air (140°C) 12. Take-ups for standard packing on Z2 spools and reel-less coils. • Treatment tanks in PP for washing up to 60°C/stainless steel for higher temperatures • Tank for lead in iron alloy pilling (thickness 40mm) • Low energy consumption thanks to Further characteristics of the line are:

▲ ▲ Bronzing unit – exit wire

thermal insulation and heat recovery during the process • Low water consumption thanks to the use of multistage cooling systems with intermediate air-wipes and large use of recycling • Possibility of full recovery of residual acid and iron from baths by systems of enrichment, filtration and centrifugation • Lack of waste due to an automatic wire lifting system which raises the wire out of the acid and bronzing baths during line stoppage for spool replacement in winding/unwinding phases • Stratification system of wire in winding managed by software with possibility of automatic correction of non-uniformity • Continuous monitoring of the process from the operator station and possibility of remote supervision.

The work cycle process is:

1. Motorised pay-offs for spools with net capacity of 2,000kg and complete with adjustable systems for drawing wires 2. Stress relieving furnace made of lead, working at approximately 400°C, internal

Eurolls SpA – Italy Website : www.eurolls.com

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July 2013