Metal Finishing Guide Book


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bend over, and allow an even, fluid arm motion. For an automated application, the correct booth size will provide enough space for automatic equipment to operate effectively. This includes allowing for the operation of sideFig. 9. Open-front booth design. On the left is a poor booth to-side and overhead design; the conveyor openings are too large and too close reciprocators, and to the exhaust chamber resulting in less air flow past the painter. providing the necesA better design, on the right, makes use of entrance sary clearances for electrostatic equipment. During finishing, there should be sufficient velocity through the booth and past the equipment to keep it in clean operating condition. When conveyors are transporting parts through the booth, the booth size is directly related to conveyor speed. Minimum and maximum part dimensions determine the booth width, height, and depth. Acceptable booth width will allow at least 3 ft on either side of the part, at least 6 ft of work space for each operator in multiple-operator applications, and a minimum of 2 ft from all conveyor openings. To determine the width, measure the diagonal dimension of the largest part, including the fixture or pallet it is on, and add a 2- to 4-ft clearance on each end. This space permits the part to be turned if necessary and enables the operator to work comfortably. Adequate booth height will allow at least 2 ft above the largest part and allow for conveyor height or include a housing for the conveyor rail. Booth height is determined by the overall height of the largest part, plus 2 to 3 ft clearance. Add the height of the holding fixture if the part is moved by a Fig. 10. Booth placement. Booths should not conveyor. This measurement gives be placed too close to building walls (a); place the booth front at a distance front he the operator sufficient room to coat wall that is equal to the height of the booth (b); or the top of the part without coating place the booth next to the wall with a the booth ceiling. The part should direct connected air-input plenum. 778

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