Functioning Of The Unit; Description Of Unit; Airless Process - HBM Machines 10577 Bedienungsanleitung

DESCRIPTION OF UNIT

2.2.2
FILTERING
Sufficient filtering is required for fault-free operation. To this
purpose the unit is equipped with a suction filter (Item 1) and
an insertion filter in the spray gun (Item 2). Regular inspec-
tion of these filters for damage or soiling is urgently recom-
mended.
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3.
DESCRIPTION OF UNIT
3.1

AIRLESS PROCESS

The main area of application are thick layers of highly viscous
coating material.
At the 10577 unit a diaphragm pump takes in the coating
materials and transports it via a high-pressure hose to the
spray gun with the airless tip. Here the coating material at-
omizes since it is pressed through the tip core at a maximum
pressure of 22 MPa (220 bar,3300 psi). This high pressure has
the effect of micro fine atomisation of the coating material.
As no air is used in this process, it is described as an AIRLESS
process.
This method of spraying has the advantages of finest atomisa-
tion, cloudless operation (depending of a correct unit adjust-
ment) and a smooth, bubblefree surface. As well as these, the
advantages of the speed of work and convenience must be
mentioned.
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3.2

FUNCTIONING OF THE UNIT

The following section contains a brief description of the tech-
nical construction for better understanding of the function:
10577 is an electrically driven high-pressure paint spraying
equipment.
The electric motor (1) drives the hydraulic pump via gears (2).
A piston (3) is moved up and down so that hydraulic oil is
moved under the diaphragm (4) which then moves.
In detail:
The downwards movement of the machine opens the disk in-
let valve (5) automatically and coating material is sucked in.
During the upwards movement of the diaphragm, the coating
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material is displaced and the outlet valve opens while the inlet
valve is closed.
The coating material flows under high pressure through the
high-pressure hose to the spray gun and is atomized when it
exists from the tip.
The pressure control valve limits the set pressure in the hy-
draulic oil circuit and thus also the pressure of the coating
material.
A pressure change when the same tip is used also leads to a
change in the amount of paint atomized.
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