1 Function and identification
1.1 Function
Automatic spray guns are used for
n
automatic coating/marking of surfaces
n
dosing of fluids
n
placement of adhesive or marking points
Typical spray fluids are paints, dyes, adhesives, glazes, enamels, release agents, etc.
The spray fluid is fed into the automatic spray gun under pressure. This pressure is typically gener-
ated by pumps or pressure containers. The automatic spray gun is controlled via compressed air.
For the precise control of the automatic spray gun, electrically-activated solenoid valves can be
used. Switching times of 60 ms can be achieved this way.
Upon opening the control, the control piston charged with compressed air first opens the atomizer
air valve and then with a short delay the fluid nozzle of the automatic spray gun. Upon closing the
control, first the fluid nozzle and then the atomizer air valve is closed in order to prevent a subse-
quent dripping of the spray fluid.
The spray fluid is atomised using compressed air. The geometry of the spray jet and the sprayed
quantity of the spray fluid can be adjusted with the following measures:
n
Selection of the air and fluid nozzle
n
Changing of the atomiser air pressure
n
Changing of the spray fluid pressure
n
Adjustment of the needle stroke on the regulator of the automatic spray gun
The automatic spray gun consists of the following materials:
Component
Material
Head piece
Stainless steel or anodised aluminium
Control section
Aluminium anodised
Main element
Needle
Stainless steel
Nozzle
Seals
various plastics
Automatic spray gun M14
ENGLISH
■
200-0153
GB–5
Summary of Contents for 200-0153
Page 48: ......
