Method and apparatus for coating three dimensional articles

Details Method and apparatus for coating three dimensional articles Method and apparatus for coating three dimensional articles

B - Operations, Transporting

05

B

B05B 12/02 (2006.01) B05B 7/14 (2006.01) B05B 12/12 (2006.01) B05C 11/00 (2006.01)

Patent

CA 2159216

A method and apparatus (10) for powder coating three dimen- sional articles (12) carried on a conveyor (14) includes a controller (36) for controlling the rate at which coating material is discharged from a gun (16), so that the rate is proportional to the surface area of the surface portions of the article (12) as they pass the gun (16). Some surface portions topographically have a greater surface area which must be covered, while others are flat or have cut-out regions, requir- ing less coverage or no coverage at all. In powder coating operations, the discharge rate is controlled via automatic or programmed control of an electro-pneumatic air regulator (42) which regulates the supply of pressurized air to a powder pump (24) connected to the spray gun (16). The apparatus (10) assures uniformity in coating for a three dimensional article (12) with multiple surface portions of varying to- pography such as curves, angles, cut outs, etc., while minimizing the amount of wasted coating material.

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