Overspray extractor

Details Overspray extractor Overspray extractor

1991-07-22

1993-04-27

Jones, W. Gary

Coating apparatus

Projection or spray type

Endless conveyer for work

118DIG7, 118326, B05B 1302

Patent

active

052058697

ABSTRACT:
An overspray extractor collects the overspray of a volatile organic compound coating material sprayed onto three-piece steel cans. The overspray extractor comprises a hood having five orthogonal walls, with the bottom wall having a slot of predetermined width that is placed above the cans and downstream of the coating material nozzles. The ratio of the height of the hood between the top and bottom walls to the width of the bottom wall slot is greater than one. The hood is connected by means of a throat located opposite an outside wall to an exhaust passage. When a vacuum is applied to the hood, coating material overspray and atmospheric air are drawn into the hood through the slot and through the hood into the exhaust passage. A slit in the outside wall permits atmospheric air to be drawn into the hood to flow along and scrub the top wall of solids from the coating material that coagulate on the top wall. The overspray extractor further comprises a face plate that removably covers an opening in the outside wall. Removing the cover enables the interior of the hood to be cleaned in place. The overspray extractor operates for much longer times without requiring cleaning and requires less power than prior equipment.

REFERENCES:
patent: 4489316 (1984-11-01), Fritz et al.
patent: 4730647 (1988-03-01), Mulder
patent: 5020511 (1991-06-01), Liu

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