Revision index : C - 1/29/97
- 6 -
Code : RT 6076
1.3 - Operating Principle of Powder Spray Gun
(Refer to Fig.3)
The SRV 028-2-Twin 60
°
spray gun operates on the "corona" effect principle. An ionizing electrode [A]
located at the end of the spray gun and is connected to a high negative potential. Air is ionized by the
electrode which is surrounded by the intense electric field.
The emitted ions follow the magnetic field pattern and reach the part being painted. Powder is charged
when it passes through the ionized electric field.
In order to ensure that the powder sticks to the part being painted, the latter must be a good conductor
(or semi-conductor) and properly earthed (the electrical resistance of the part, in relation to the earth
must be less than 1 M
Ω
).
The high voltage generator is integral with the spray gun.
Fig. 3.
A
