Ferramentas e equipamentos para reparos de pintura

501-36-32 Paint - General Information 501-36-32 DESCRIPTION AND OPERATION ‡ Tools with a rigid backing pad do not adjust to fit the surface. They are used for flat surfaces. ‡ Tools with a flexible backing pad are used for fine sanding of a surface because they adjust to the shape of the surface. ‡ Build up an even working pressure over the sanding surface. ‡ Keep the sanding paper tight on the tool (use self-gripping systems). ‡ Align the extraction holes in the sanding paper with the holes in the tool. ‡ Guide the tool flat over the surface to be worked. Do not tilt it. Hand sanding can be carried out dry but also wet. Wet and dry paper with particle size P 80 to P 1200 is used for this in the paint field. Ways of sanding Sanding tools are driven either by electricity or compressed air. TO BE UPDATED LATER Item Description 1 Sanding machine 2 Polishing machine 3 Orbital sander The disadvantage of electrically driven machines is that their own weight is high compared with pneumatic systems. They also become warm during work. They do not however need any special operating equipment for their energy supply. Sanding machines are categorized by their type of sanding movement. Rotational sanders On these machines the sanding paper turns. ‡ Advantage: œ Ideal for heavy sanding work. œ Fast and aggressive sanding possible. ‡ Disadvantage: œ Large amount of heat developed. œ Difficulty sanding flat surfaces. ‡ Application: œ Removal of old paint layers. œ Preparation of panel for stopper. œ Removal of rust. Oscillating sander On these machines the sanding paper oscillates. The backing pad is rectangular. ‡ Advantage: œ Large sanding surface. œ Ideal for large and flat surfaces. ‡ Disadvantage: œ Hardly useable on rounded surfaces. œ Flexible backing pad not possible. œ Vibrations because of the poor support of the backing pad. ‡ Application: œ Sanding of polyester stopper. œ Sanding processes on flat surfaces. Orbital sander On these machines the sanding paper turns and oscillates. ‡ Advantage: œ Easy to handle and good sanding power. œ Minimal heat development. ‡ Disadvantage: œ Not suitable for sanding stopper on flat surfaces. œ Smooth guidance important, otherwise sanding marks will occur. ‡ Application: œ Sanding of paint layers. œ Well suited for final preparation of a primer. NOTE: Comply with the manufacturer's recommendations when setting the orbital sander.