27-09-2014, 01:34 PM
Abstracts: Our main aim is operate the spray painting machine without electricity. We hope this concept is very useful where electricity is not available. Here in manually operated spray painting machine compressor is not used so cost is reduced. Air is contains compressed by air filling pump which is foot operated and by means of that air has been stored in the air storage tank. A Spray painting machine which we made is manually operated and doesn’t consume electricity. The paint container contains paint material. The spray gun sprays on the metal substances with good painted surface finish. The non return valve prevents the air return to the duct and without electricity paints can be done on the metal bodies. Spray painting is a process by which air is driven across the mouth of a small outlet under such pressure as to draw the paint out and produce an air-paint mist from the jet of the spray-gun. In addition, the paint may be fed under pressure to the gun. Spray painting may be carried out by hand. Paint can be fed by gravity from a paint reservoir sitting atop the airbrush (called gravity feed) or siphoned from a reservoir mounted below (bottom feed) or on the side (side feed). Each feed type carries unique advantages. Gravity feed instruments require less air pressure for suction as the gravity pulls the paint into the mixing chamber. Typically instruments with the finest mist atomization and detail requirements use this method. Side- and bottom-feed instruments allow the artist to see over the top, with the former sometimes offering left-handed and right-handed options to suit the artist.