Translation of the original Operation Manual
3-5
•1307_PU280_SV1018DV1020_BAoDB_en•ski
en
Machine Description
(Figure 3.2) + (Figure 3.3)
A feed pump must be placed into the delivered drum (200 l bunghole barrels) of
each component.
We recommend to equip the drum with the Iso-component (isocyanate) with an
additional silicagel filter, to prevent the material from reacting with humidity and
thus crystallization of the material.
Both components are fed to the metering pump and exactly metered with the
respective mixing ratio (see machine card).
Each component is individually heated to the required processing temperature in
a material flow heater. The temperature is automatically regulated in accordance
with the temperature setting. Preset top temperature limits make sure that the ma
-
terial will not be overheated. For short breaks the heating may remain switched
on.
After the material flow heater, the material arrives:
a) for spraying: to the spray gun
b) to vent the system: back into the delivered drum (only optional).
When spraying the material is directed through the heated hose package to the
spray gun. The hose package contains a compressed air line to supply the spray
gun with compressed air, as well as a material hose for each component with a
3 m whip end. The temperature sensor is integrated in the whip end.
Mixing of material only takes place in the pneumatically controlled spray gun, the
spray pattern can be pneumatically influenced with the jet regulating screw, as
required.
The material flow is controlled by opening and closing the mixing chamber. With
the spray gun closed the material residue in the mixing chamber is mechanically
forced out. A material plug that may possibly be stuck in the outlet opening can be
removed with the help of compressed air.
(Figure 3.2) + (Figure 3.3)
The compressed air supply provided by the customer is connected to the main
-
tenance unit of the equipment. From there the compressed air is directed to the
metering pump, the feed pumps and the spray gun. The required working pres
-
sure for the feed pumps, spray gun and metering pump can be regulated by the
pneumatic regulators on the control cabinet. The maximum operating pressures
must thereby be complied with (see chapter:
“13.1 Technical data”, p. 13-1
(Figure 3.2) + (Figure 3.3)
The temperatures for both material flow heaters and for the hose package are ad
-
justed at the control cabinet of the equipment. The automatic temperature control
prevents overheating of the material.
3.9.3
Material flow
Attention!
Ensure correct component
allocation at all times!
red =
Iso
components
(isocyanate)
blue =
Poly
components
(Polyol)
3.9.4 Compressed air
control
3.9.5 Temperature
control
Summary of Contents for DUOMIX PU280
Page 68: ......
