EuroWire May 2019

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Technology News

▲ ▲ Combined pull-in, bending and straightening machine fromWiTechs

Mechanical descaling fromWiTechs

• 33 per cent less zinc by replacement with calcium • 40 per cent lower chemical requirements due to compact and fine crystalline layer • Three-second coating time compared to seven minutes for classic procedures • Elimination of highly toxic activation chemicals • High binding forces prevent shearing during forming • No waste of old acid; use of economy flushing technology reduces waste water by 40 per cent

Production range: • Wire inlet ø8-15mm • Wire outlet drawing speed up to 10m/s • Wire inlet speed up to 1.5m/s

WIRE rod is propelled by a horizontal wire rod pay-off system in a combined pull-in, bending and straightening machine (BDM-2S/EG) fromWiTechs. The scale layer is broken and the wire is straightened without cracks. The wire pull in is facilitated by this concept. Using the double-head sanding descaler (SEZ-6-302S), the wire will be cleaned and surface pre-treated for the further coating process through two sanding belts with a nearly 100 per cent clean result. The next wire preparation step is done by an in-line electro-phosphating plant (Ephos®) from Staku.

For example: •

Wire inlet ø13mm Finished wire ø5mm Wire inlet speed 1.2m/s

• • •

Wire outlet drawing speed 8m/s

Advantages of this electrolytic process compared to classical chemical phosphating are: • Bath temperature only 45°C instead of 80°C • Sludge-free process

WiTechs GmbH – Germany Website : www.witechs.de

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May 2019