The coil coating process

The metal substrate (steel or aluminium) is delivered in coil form from the rolling mills. Coils weight varies from 5-6 tonnes for Aluminium and up to 20 tonnes for steel.

LITONG are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

The coil is positioned at the beginning of the line, and then unwound at a constant speed, passing through the various pre-treatment and coating processes before being recoiled.

Two strip accumulators found at the beginning and the end of the line enable the work to be continuous, allowing new coils to be added (and finished coils removed) by a metal stitching process without having to slow down or stop the line.

If you are looking for more details, kindly visit Coating aluminum coil for packaging.

The following steps take place on a modern coating line:

• Mechanical stitching of the strip to its predecessor
• Cleaning the strip
• Power brushing
• Surface treatment by chemical conversion
• Drying the strip
• Application of primer on one or both sides
• Passage through the first curing oven (between 15 to 60 seconds)
• Cooling down the strip
• Coating the finish on one or both sides
• Passage through the second curing oven (between 15 to 60 seconds)
• Cooling down to room temperature
• Rewinding of the coated coil.

Entry End

Uncoiler

Metal coils, up to 60,000 pounds, are received and undergo visual inspection before moving to the uncoiler for unwinding.

Coil Stitch

At this stage, previous and next coil ends are mechanically joined, ensuring continuous feed in the coil coating line.

For more information, please visit Coating aluminum coil for electronics.