9
description of unit
PL3500
3
DeScrIpTIoN of uNIT
3.1
AIrleSS proceSS
A diaphragm pump takes in the coating material by suction and
conveys it to the tip. Pressed through the tip at a pressure of
up to a maximum of 3300 PSI (228 bar, 22.8 MPa), the coating
material is atomized. This high pressure has the effect of micro
fine atomization 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
atomization, cloudless operation and a smooth, bubble-free
surface. As well as these, the advantages of high production
speed and convenience must be mentioned.
3.2
fuNcTIoNINg of The uNIT
The following section contains a brief description of the
technical construction for better understanding of the function
of the unit:
PowrLiner 3500 is a gas engine-driven high-pressure paint
sprayer.
The gas engine (Fig. 2, 1) drives the hydraulic pump via planetary
gears (2). A piston (3) is moved up and down so that hydraulic
oil is moved under the diaphragm (4) which then moves.
The downwards movement of the machine opens the disk inlet
valve (5) automatically and coating material is sucked in.
3
4
5
1
2
During the upwards movement of the diaphragm, the coating
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
exits from the tip.
The pressure control valve limits the set pressure in the hydraulic
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.
