The
input to the cyclones is connected to the booth whileCyclones are
popular for powder recovery, especially if color change are
involved, as cleaning is comparatively easy compared with cartridge
filters. Also in automated systems at high throughput rates,
cyclones enable oversprayed material to be collected continuously
at the required speed. The output is connected to a suitable
exhaust fan. The overspray powder arrived at the cyclone inlet at a
velocity of about *0 m/s. On entering the cyclone chamber
tangentially the air/powder mixture is given a rotary motion which
creates a centrifugal force on the particles. The larger and
heavier particles tend to be ejected to the outside walls of the
chamber and fall to the bottom is deflected by a conical tail
air/powder mix into a rising spiral which is then carried through
the central stack to a filter collector. The
recovered powder is removed from the cyclone by means of a rotary
valve and is then passed through a sieve to remove any agglomerates
and foreign matter. The recovered powder is then blended with the
virgin material in predetermined proportions.
