In-Depth Study Report: Control Technology for Autobody Repair Shops: Small Parts211 Painting in a Downdraft Booth at BASF Corporation, Whitehouse, Ohio

摘要

This study was conducted to evaluate whether paint overspray exposures could be211u001eminimized by orienting the parts to be painted. In this study, the effect of part 211u001eorientation upon pain mist concentrations was studied in a downdraft spray 211u001epainting booth. The booth had an exhaust trench along the center axis of the 211u001ebooth. Two parts were repeatedly painted: A fender and a bumper. The parts were 211u001eset on sawhorses on top of this exhaust trench. When the bumper was perpendicular 211u001eto the exhaust trench, the geometric mean total paint mist concentration 211u001eincreased from 5.5 to 15 COM (p-0.007). This increased exposure may be due to an 211u001eeddy located under cornices on the side of the booth. When paint overspray is 211u001edirected into these eddies, the eddy transports the paint overspray to the top of 211u001ebooth, resulting in the contamination of the incoming fresh air. Computer 211u001emodeling suggests that these eddies can be eliminated by altering the 211u001econfiguration of the booth.