B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/36 (2006.01) B05B 15/12 (2006.01)
Patent
CA 2445733
A powder spray booth (2) with a powder recovery system having an overspray intake (18) communicating with the interior of the booth. A vertically extending duct (20) leads from the overspray intake to a powder recovery system such as, for example, a cyclone. The vertically extending duct may have doors (32) opening to the interior of the booth to provide access to the vertical duct for cleaning. The doors may have holes (120) to aspirate air from the booth interior to optimize air flow patterns within the booth. A diverter plate (26) within the booth (2) defines with the booth floor (10) a floor duct leading to the overspray intake (18). The diverter plate has apertures for allowing oversprayed powder to be collected through the plate. The diverter plate may be provided as two or more diverter plates held at different elevation levels within the booth to define a floor duct which is larger in parts of the floor duct which are closer to the overspray intake than parts of the floor duct which are farther from the overspray intake. The coating system may include an air assist which provides jets of air across a portion of the interior surface of the booth. The surface may be one or more sloped portions (22) of the floor and/or one or more portions of the diverter plate. The air supply may be pulsed to produce periodic bursts of air across the interior surface. The booth walls are made of non-conductive resin based cored composite materials in one embodiment. Various non-conductive fastening devices and two component resin bonding materials may be used to form mechanical joints to assemble a spray booth. A hybrid spray booth is also disclosed having cored composite and thermoplastic wall structures.
Jones Edward L.
Shutic Jeffrey R.
Corporation Nordson
Macrae & Co.
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