Ferramentas e equipamentos para reparos de pintura

501-36-29 Paint - General Information 501-36-29 DESCRIPTION AND OPERATION Types of spray gun TO BE UPDATED LATER Item Description 1 Suction-beaker spray gun 2 Flow-beaker spray gun In the flow-beaker spray gun, the paint container is mounted above the spray gun. On the suction-beaker spray gun, it is below. Furthermore, spray guns are categorized by their air pressure requirement into high and low pressure guns. High pressure guns have the disadvantage that they exhibit high consumption of energy and materials. The spray pressure they require is between 1 - 6 bar. Because of the high air pressure and the large amount of air needed, the result is a powerful paint mist formation (paint transfer rate approx. 35%). Current practice is mainly to work with reduced mist spray systems (RP and HVLP systems). Reduced pressure (RP) guns are optimized high pressure guns which have an input pressure at the gun of approx. 2.5 bar and an atomization pressure at the air cap of 1 - 2 bar. In practice this spray technology is preferred for spraying clear lacquer because of the finer atomization. Low pressure guns have the advantage that they exhibit minimal paint mist formation and because of this the paint transfer rate rises to approx. 65%. The spray pressure required in this case is between 1 - 5 bar. Nozzle sizes from 1 - 2.2 mm can be used. HVLP spray guns TO BE UPDATED LATER Item Description 1 Quantity control 2 Working pressure control 3 Spray pattern control The high volume low pressure (HVLP) spray gun is a high performance spray gun which forms a soft, fine and homogenous spray pattern. The atomization pressure at the air cap is 0.7 bar when the input pressure at the gun is 2.0 bar. The low atomization pressure of 0.7 bar together with greatly reduced spray mist provide high material ejection. The low nozzle internal pressure minimizes rebound of the paint droplets from the object and thus the proportion of overspray. This spray technology has a very high application efficiency. By matching the size of the nozzle, the HVLP spray gun can be used for all repair painting materials. HVLP spray guns are often used in practice for the application of water based paints. Mini spray guns are often used for small, localized touching-up work. Use of HVLP spray technology and nozzle sizes of 0.3 - 1.2 mm permits very fine