Working with the spray guns
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0390882
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PEA-C4-HiCoat FM
01 / 2008
3.
Working with the spray guns
3.1
Optimizing the spray pattern for your coating
0301_ .doc
•
Switch on the high voltage generator and the powder feed.
Caution
To minimize the wear on the wearing parts, the total feed air and dosage air
should be
under
5 Nm
3
/h
!
The atomizing air should be adjusted for the
•
Fan spray nozzle
to
0.1 Nm
3
/h
•
Round spray nozzle
to
0.2 Nm
3
/h
•
Adjust the powder quantity and the powder speed on a test piece.
3.2
Switching off the spray gun
0302_ .doc
The spray gun is switched off differently depending on the type of powder injector. In the
majority of cases this process is be performed by a control unit of the coating system.
Hint
On each interruption to work, the spray gun should be blown through (purged) and
powder residue removed. In this way
powder deposits
and a
surge
the next time the
spray gun is switched on can be largely avoided.
If you want to manually switch off the spray gun and are using a powder injector that is
not
designed
for automatic purging, proceed as follows:
•
The atomizing air
must
be left open so that
no powder
can enter the atomizing air ducts
and the cascade space during purging. Switch off the powder feed and the high voltage
generator.
•
If you do not want to change the settings for the feed air and dosage air so that you can
continue to coat using the same powder pattern, pull the powder injector out of the injector
connection on the powder container. No more powder will be fed when the powder feed is
switched back on.
•
Switch the powder feed back on so that the spray gun is blown clear of powder.
•
You can now switch off the powder feed.
