Table of Contents
Advertisement
GUN HANDLING
Th~ first requirement for a good
resultant
finish is the
proper handling of the gun. The gun should be hdd per-
pendicular
to the surfate heing covered, and moved par-
allel with
it. The stroke
should be started before
the
Irigger is pulled and the trigger should be released before
the st roke is ended. This gives accurate control
of the
gun and material.
The distance between gun and surface shovld be 6 to 10
inches depending
on material
and atomizing
presSure.
TII\: material deposited
should always be even and wet.
Lap each stroke over the preceeding stroke to obtain 3
uniform
finish.
NOTE:
1. To rp-duce overspray and obtain maximum
efficiency; always spray with the lowest possible atomiz-
ing air pressure.
2. Using fore finger to control
trigger provides you
sentitive spraying operation.
CONTROLLING THE FAN SPRAY AND THE FLUID
-
.
Coetting will
be light
at this point
,
Coetting will
be heavy
at this point
I
'
!
/""
.
/
1///
!/
.'
....
/'
./
"
/'
----
"-
"-
"
WRONG
1
"
\
\
I
/
Coating should be even
",'0;Mh..
\!
a.d wolwho.
,;..
1-
_~__L,IV~C'_
~
'
- -
--~ - ~
Start
Pull
Release End of
stroke
tri1Xl8r
\
trigger
stroke
pray width adjustment-
Turn right
for round,
left for fan.
RIGHT
Fluid
cont
rol screw-Turn to ;jght to
decreaseflow,
left to increase.
1. If a fluid pressure tank is used. The amount of fluid can also be
controlled by regulating the pressure on the tank.
2. As width of spray is increased, more material must be allowed to
pass through the gun to obtain the same coverage on the increased
area.
3. The direction of the ian spray. either horizontal or vertical, is
obtained by turning the air nozzle to the desired position, then
tightening the retainer ring.
'.
SIPHON SPRAYING
"'"
"
The spray pattern of the gun
.
is variable from round to flat
. ~
with all patterns in between.
"'"
......
~s~~~-.~
,'''
.
In normal operation,
the wings
on the nozzle are horizontal as
lius trated here.
This provides a
vertical fan shaped pattern which
gives maximum
even, uniform,
material coverage as the gun is
moved back and forth parallel to
the surface being finished.
Set atomization pressure at approximately 50 psi for
lacquer and 60 psi for enamel. Test spray. If the spray
is too fme,reducethe air pressure
or openfluid control
screw. If the spray is too coarse, close the fluid control
screw. Adjust the pattern width and repeat adjustment
of spray if necessary.
PRESSURE SPRAYING
After
selecting
correct sizefluidorifice,set fluidpres-
sure for desired flow. Open atomization air an.J test
spray. If spray is too fine reduce air pressure. If spray is
too coarse,raiseair pressure.Adjustpattern
width and
repeat adjustment of spray.
Keeping fluid control screw in open position will re-
duce fluid needle wear.
NOTE: To reduce overspray and obtain maxi-
mllm efficienc:v. always spray with the lowest
possible atomization
air pres.sure.
2
Advertisement
Table of Contents
