Coil Coating Process
Coil coating is a liquid paint system that comprises Topcoat, Back coat and Primers. It is available in a wide range of colours and finishes that can be applied to Steel / aluminium coils with the help of rolls. These can be cured in a minute’s time and recoiled for delivery to end users.
Coil coating is replacing traditional ways of manufacturing with the value added process. An old practice of painting of the unpainted bodies is getting substituted with percolated Sheet metal. Being used in Nip coating or Dip coating, solvent usage is minimal, helps in VOC reduction.
A. Bare metal is uncoiled
B. Coil splicing
C. Accumulator stack
D. Metal degreasing, cleaning, rinsing & checmical pretreatment
E. Drying Oven
F. Primer unit – one or both sides
G. Curing oven
H. Coating unit-top coat applied one or both sides
I. Curing Oven
J. Laminating-one or both sides, or embossing
K. Accumulator stack (exit)
L. Recoiling finished metal
What makes Coil Coating different than other Painting Method?
- Coil Coating paints are applied on flat metal strip.
- Cured in Oven at a high temperature, quenched with cold water and recoiled.
- Coated coils are uncoiled, formed and cut for final use.
- Paint first then fabricate – pre-painted.
- Applied at very low DFT as compared to other paint applications
- Nearly 100% utilization of paint while application i.e. minimum loss of paint while application as compared to other paint application methods.
- Low emission of solvent hence less impact on environment.
- Faster application hence high productivity.