Ferramentas e equipamentos para reparos de pintura

501-36-33 Paint - General Information 501-36-33 DESCRIPTION AND OPERATION On the orbital sander, stroke settings of approx. 3 mm for fine sanding work and approx. 5 - 7 mm for coarse sanding work have been established. Polishing and finishing tools The term polishing in the context of paint repairs means the elimination of paint flaws and high shine polishing of neighboring parts. During polishing the fine sanded surface is returned to a high shine using a special abrasive polish. Before the actual polishing, all flaws in the paint surface must be removed and the following working procedures must be adhered to: ‡ Thoroughly clean the vehicle. ‡ Remove spray mist from all surfaces. ‡ Sand out and polish particle inclusions. ‡ Sand down paint runs and polish them out. ‡ Examine the exactness of the color match in daylight. ‡ Remove masking edges. ‡ Remove sanding water, sanding dust and polish residues. After the polishing process the results must be tested using a special test spray. Infrared drying technology The drying process in a painting/drying cabin occurs through heat conductance (convection). When an infrared dryer is used, the drying process is through heat radiation. TO BE UPDATED LATER The infrared rays penetrate the air and the paint layer without warming them. Because the infrared rays are reflected from the steel panel, the paint coat is warmed from the inside outwards. Advantages of infrared drying: ‡ The drying process occurs from the inside to the outside. ‡ The drying time is shorter than for warm air systems. ‡ Because the infrared dryer consists of several cassettes which can be switched on independently, the drying area can be optimally controlled. Independent of the manufacturer's instructions, pay attention to the following: ‡ Flash-off time of the paint before switching on the infrared dryer. ‡ Distance between the infrared dryer and the surface. ‡ Duration of the irradiation. The most common use of the infrared dryer is to dry stopper and primers. The wait time between the job steps is shortened without having to use the painting/drying cabin. The painting/drying cabin can then be used exclusively for application and drying of topcoat. There are two types of infrared dryer: ‡ Infrared dryer with short wavelength radiation. ‡ Infrared dryer with medium wavelength radiation. As an indication, the following drying times are listed for some materials (at 80 cm distance): NOTE: Observe the material manufacturer's and supplier's specifications. ‡ Polyester stopper 2 minutes. ‡ Spray stopper 2 to 7 minutes. ‡ Water based primer-filler 7 to 9 minutes. ‡ Primer 3 to 8 minutes. ‡ Top coat 7 to 10 minutes. $LU GU\HUV The air dryer is suitable in places where drying needs to be done, but without great outlay (painting/drying cabin or infrared dryer).