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.
