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E-Tech Powder Coating Process ::
1. Preparation: Depending on the base material of the substrate,
we will carefully clean any pre-existing coatings from the part(s)
to be powder coated. This will be done by using different types
of media to blast off pre-existing coatings.
2. Media mask: Any area on the part with machined surfaces, studs
or threaded holes will be masked or plugged off to protect them
from the media blasting process. If there is any area’s
that need to be masked, or plugged off, like machined surfaces,
or threaded holes or studs. We’ll mask them in order to
protect them from the media blasting process.
3. Remove media mask: Masking that was applied in the blast process
is then removed and the part(s) will be inspected to make sure
all the previous finish was completely removed.
4. Polishing: If this step is required, we will polish the part(s),
clean by pressure washing, and finally pre-bake the part to insure
that there are no contaminates have been left on the part during
the polishing process.
5. Washing: Parts are washed with a high pressure hot water washing,
processed for corrosion treatment and then high pressure hot water
rinsed to clean off any chemicals that may have been left on surface
of the part(s) in the corrosion treatment process. The final step
is to dry off part(s).
6. Mask: In our masking process we use high temperature tapes,
template plates or hi temperature plugs. Our technicians wear
latex gloves to make sure part(s) will not be contaminated.
7. Rack: Parts are placed on and secured to the rack, and then
moved to the oven department.
8. Pre Bake: Not all part(s) need to be pre baked. If needed,
part(s) are pre baked in the oven a few degrees hotter than the
temperature needed to cure the powder once it gets applied. This
process is called (out gassing) which bakes out any oil contaminates
or gases due to the porosity of the metal.
9. Powder application: The rack with parts attached are then placed
in the powder booth and electrically grounded for powder coating.
Using the powder gun, the powder is electrically charged and attaches
to the part being coated. The powder is electrically charged though
the powder gun to make the powder attract to the part being coated.
Parts are then inspected for coverage.
a. II Stage powders: II stages take a few extra steps from the
powder booth to the oven to do this process. In between the coats
of powder the powder is heated until it flows out. And when the
part(s) has cold down the next coat of powder will get applied.
Then powder will be checked for the right film build.
10. Cure: The racked part(s) are placed in oven for curing and
the final cross linking of the powder to substrate. E-Tech has
the equipment to monitor when the part(s) are up to the correct
temperature to start the curing process. This process is very
important (if powder is under cured it can chip easier and over
curing the powder may get an amber cast to the color.
11. Cooling Down: Parts are removed from the oven, allowed to
cool down de-masked and are final Q C inspection.
12. Pickup or Ship: Once parts are cooled down and inspected they
are ready for pickup or packaged and shipped out to the customer.
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