| 摘要 |
<p>A powder feeder (10) for supplying particulate powder material to powder applicators (40) mounted in a powder spray booth (37) comprises a housing (12) having an inlet (32) connected to the powder recovery system (42) of the powder spray booth (34), and an outlet (36). A fluidizing plate (26) and pump (35) or rotating screw feeder (66) is mounted within the interior of the housing (12) to aid in the discharge of particulate powder material through the outlet (36) of the housing (12) to the powder applicators (40) in the spray booth (37). A clean air chamber (52) mounted to the housing (12) is formed with an inlet (54) communicating with the housing interior (22) and an outlet (56) located outside of the housing (12) which is connected to a source of vacuum (76). The vacuum source (76) creates a negative pressure within the clean air chamber (52) to draw air from the housing interior (22) to vent its interior. A cartridge filter (58) is mounted within the housing (12) to the inlet (54) of the clean air chamber (52) to prevent airborne particulate powder material from exiting the housing (12) in the course of venting thereof. The cartridge filter (58) is automatically cleaned of collected particulate powder material by a blow back device (60) mounted in the clean air chamber (52).</p> |
