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| Colour Coating Line |
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In 1988, Ispat Industries Limited installed a Colour Coating Line at Kalmeshwar - the first of its kind in India - for the manufacture of pre-painted colour steel sheets. The Colour Coating Line has a capacity of 60,000 tonnes per annum.
Galvanized coils constitute the raw material for the colour coating process. The Colour Coating Line incorporates surface preparation, service coating, heating, cooling, prime coating, top coating/printing and guard film application. Pro-gold treatment is applied for better adhesion of paint, with a substrate corrosion resistant. A drier is provided to dry the surface and attain a temperature between 100 to 120 degrees C.
In the service coating process, paint is applied by a paint coating machine. The ovens for baking temperature depend on line speed and thickness of coil. A controller is provided to squeeze the water and control the sheet at centre position. Thereafter, prime coating and top coating/printing are carried out by the paint coating machine. Finally, guard film (sticking polythene) is applied to safeguard against scratches and other surface defects. |
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