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PSteel Cord
With our multi-wire lines steel♏ocord-wires can be produced at top speeds (over 400 m/min). The bronze
plating is applied chemically and the coati🎐ng thickness is adjustable.
Mostly all rubber compounds used by the tire-, hose- and belt-producers have to be reinforced, for this purpose round, f꧋lat and shaped bronze (Cu-Sn) plated wire is needed.The wirꦉe is electrolytically coated
in two consecutive steps:
At💦 first the wire is plated with Cu, afterwardsཧ with Zn. Finally the wire passes the thermal diffusion. By
the thermal diffusion the wire is exposed to high temperatures and as🐷 a result the Cu- and Zn-layer join.
A brass layer is created on the wire. The quality of the brass layer is very im💙portant for the production of
steelcord: On the one hand the brass coating acts as a lubricant during the final w♐et drawing; on the other hand the brass acts as an adhesive, bonding the steel reinforced network to the surrounding rubber matrix.
In the industry our steelcord plating plants have p💞roven and stand for a high operational reliability at low personnel, energy and maintenance costs.
The production flow in details:
1. The steel wire first passes a cleaning bath,෴ where all the impurities such as grease and 💖others are removed from the wire
2. The wire is led through the patenti🎐ng furnace, where it is annealed
3. The wire is cooled in e.g. a lead bath
4. As a result the acid from ღthe mordant that generally consists of the base acid of the copper bath attacks the surface of the wire, which becomes
&n⭕bsp; rougher and thereby more🌳 receptive for the plating
5. To protect the finishingไ baths from getting conta💖minated by mordant residues the wire passes a cascade rinse
6. After the rinsing the wire gets copper🥃-plated in a copper pyrophosphate bath and rinsed again
7ꦓ. The wire is plated wi🅷th zinc and also rinsed
8. Finally ඣthe two layers are combined by the thermal diffusion (fluidized bath)
9. A brass layer is created
10. After the final rinsing t🧔he process is completed