| 摘要 |
A method and apparatus of applying a protective coating to the inner cavities of vehicle body components comprises a frame supporting a plurality of spray guns which is adapted to mount in a locked position upon the vehicle panel to be coated. Sensors indicate the presence of the frame in a locked position and send a signal to an electro-pneumatic controller. The controller includes a bank of pneumatic valves which interface with the spray guns and sensors mounted to the frame, and a programmable computer control which activates the pneumatic valves. Once the frame is positioned and sensed in a locked position, the controller activates linear actuators which move the spray guns to a predetermined, spraying position with respect to the vehicle body component. Sensors indicate the presence of the spray guns in such spraying position, and send a signal to the controller. The controller then initiates the spraying operation in which a protective coating is discharged from the spray guns while they are rotated relative to the vehicle body component. The extent of angular rotation of the spray guns, duration of the spraying operation and number of spray guns activated at one time are variable according to the body component to be coated so as to obtain a uniform, uninterrupted coating onto all body components.
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