Vertical Pad Wiping (Commercial Coatings)

The QED Pad Wiping Systems are designed to wipe excess zinc and to apply a smooth bright coating to the wires. As they exit the galvanizer, each wire passes longitudinally between a set of two rectangular pads. Individual screw clamping mechanisms compress each set of pads together to tightly wipe the wire. The wires exit the back side of the pads directly into individual quench tubes that cool the wires to ambient temperature.

The QED Pad Wiping Systems are designed to wipe excess zinc and to apply a smooth bright coating to the wires. As they exit the galvanizer, each wire passes longitudinally between a set of two rectangular pads. Individual screw clamping mechanisms compress each set of pads together to tightly wipe the wire. The wires exit the back side of the pads directly into individual quench tubes that cool the wires to ambient temperature.

The Pad Wiping Systems are precision made of laser-cut stainless steel sections and are custom designed to suit the wire diameters, wire pitch and galvanizer exit configuration.

Vertical Modules

On higher production galvanizing lines our Vertical Pad System offers outstanding ergonomics. The vertically exiting wire field is very close to the end of the galvanizer, providing easy access and operation in this critical area. The system is supplied in modules of 6 to10 wires that can be quickly changed for N2 modules when heavy coating production is required.

QED’s newest wiping development is our Single Wire Wiping Modules. The module frame permits mounting of any combination of Single Wire Pad and Single Wire N2 modules which guarantees unlimited production flexibility.

The wiping pads are available in a variety of materials including: fiberglass, ceramic fiber, aramid fiber, carbon fiber and combinations thereof.

Commercial Coating Weights

The zinc coating weight obtained in our pad wiping systems is a function of several factors including; wire diameter, wire tensile, pad pressure, pad type (softness), immersion time, bath temperature and wire chemistry (silicone content). However within a wire diameter range of 2mm to 4mm and with constant pad pressure, the primary variable is immersion time and coating weight can be estimated by the graph.

Zinc coating weights are about 20% to 40% pure zinc with the balance zinc-iron alloy layers.

With a modern high speed galvanizing line a typical immersion time would be 6 seconds (DV=150, 2.5mm Ø, 6m bath length).

Alloy layer coatings can be decreased by the practice of “short dipping” in the galvanizing bath.