Coating apparatus – Projection or spray type – Applying solid particulate material
Patent
1989-11-13
1991-03-12
Hoag, Willard E.
Coating apparatus
Projection or spray type
Applying solid particulate material
118326, B05C 309, B05B 1504
Patent
active
049985019
DESCRIPTION:
DESCRIPTION
Referring now to FIGS. 1-2, automotive vehicle bodies 20 are serially conveyed along a conveyor 22. Conveyor 22 conveys them past a powder coating station 42 including a powder coating- and excess powder recovery-head 44 disposed on each side of the conveyor 22. Only one of these heads 44 is illustrated, but it will immediately be appreciated that a head 44 will be required on each side of conveyor 22 to powder coat the lower regions of both sides 40 of each body 20. Since bodies 20 having different body widths and contours can be conveyed along conveyor 22, mechanisms can be provided to reciprocate heads 44 toward and away from each other as indicated by double ended arrow 46 in FIG. 2. This mechanism can include a wheeled cart 48 for each head 44, and some means (not shown) to power the reciprocation, such as hydraulic piston-and-cylinder motors or pneumatic piston-and-cylinder motors. These can be controlled by a programmable machine which keeps track of the location along conveyor 22 of each body 20. The machine will thus be able to calculate the timing of any body 20's passage between heads 44 and insure the appropriate spacing between heads 44 to accommodate that body 20's width.
Turning now specifically to a discussion of the details of construction of each head 44, it will be appreciated from FIG. 2 that head 44 includes a mouth region 50 which opens toward conveyor 22 and, surrounding mouth 50, a lip region 52 which is shaped to project into closely spaced orientation to the lower one-third to one-fourth of the side 40 of a vehicle 20 to be coated. If the side contours of different vehicles 20 conveyed along conveyor 22 are radically different, multiple stations, each equipped with two opposed heads 44 having different lip 52 contours can be provided serially.
Referring now to FIGS. 2-7, each head 44 includes a first manifold 54 and a second manifold 56. Manifolds 54, 56 are coupled through ducts 58, 60, respectively, to a single extractor duct 62, which in turn is coup led to a powder separator 64 of known configuration. Dampers 59, 61 can be provided in ducts 58, 60, respectively. A group 66, 68, 70, 72 of first inlets are provided at lip 52. Inlet 66 lies above mouth 50, inlet 68 generally below mouth 50, inlet 70 to the left of mouth 50 as viewed from the conveyor 22 side of head 44, and inlet 72 to the right of mouth 50.
As best illustrated in FIGS. 4 and 6, inlet 66 is subdivided by a plurality of baffles 74 which divide inlet 66 into multiple, generally equal frontal area openings 76. Baffles 74 extend straight rearwardly, terminating at a connecting duct 78. Connecting duct 78 connects inlet 66 to manifold 54. Baffles 74 also divide the opening of inlet 66 into generally equal area openings into connecting duct 78. As best illustrated in FIG. 2, duct 78 is provided with an independently controllable damper 80.
As best illustrated in FIG. 7, inlet 68 is subdivided by a plurality of baffles 82 which divide inlet 68 into multiple, generally equal frontal area openings 84. Baffles 82 extend straight rearwardly, terminating before a connecting duct 86. Connecting duct 86 connects inlet 68 to manifold 54. Baffles 82 also divide the opening of inlet 68 into generally equal area openings into connecting duct 86. As best illustrated in FIG. 2, duct 86 is provided with an independently controllable damper 88.
As best illustrated in FIGS. 4 and 5, each of inlets 70, 72 is subdivided by a plurality of baffles 90 which divide the inlet 70, 72 into multiple, generally equal frontal area openings 92. Baffles 90 extend straight rearwardly, terminating at a connecting duct 94. Connecting ducts 94 connect each side inlet 70, 72 to manifold 54. Baffles 90 also divide the opening of each inlet 70, 72 into generally equal area openings into connecting duct 94. As best illustrated in FIG. 6, each duct 94 is provided with an independently controllable damper 96.
A group 100, 102, 104 of second inlets is provided inside mouth 50. Inlet 100 lies generally adjacent the floor of mouth 50, inlet 102 to the left side o
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patent: 4375487 (1983-03-01), Huber
patent: 4664061 (1987-05-01), Morioka et al.
Merritt Christopher R.
Vogel James C.
Hoag Willard E.
Ransburg Corporation
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