(1)"buffing"also known as rough grinding. Refers to a process in which the damaged surface of a tyre is worn off over a large area to expose a new rough surface, so that the new tread and the old tyre can be better combined. Grinding area and depth according to the degree of damage, according to the provisions should be ground to no damage and aging crack degree.
(2)"sanding" in painting is to use sandpaper, pumice stone, fine stone powder and other friction medium to rub the coated material or coating surface, that is, grinding.Is an important step in the process of painting, is generally manual work, can also be used for air or electric equipment.Polishing throughout the entire process of painting, not only the white blank, or paint the wall needs to be polished, also want to be polished after painting.Its function is to remove the burr, floating rust, oil, dust on the surface of the substrate;Clean the coating surface of coarse particles and impurities, to obtain a flat surface;The smooth coating surface should be polished to a certain degree of roughness to enhance the adhesion of the coating.It is divided into dry sanding and wet sanding, the latter is lubricated with water or other wetting agent to obtain a smoother surface and wash off the grinding powder.
(3) "polishing"and grinding is the difference between the use of abrasive thickness, the smaller the size, the finer the size, the larger the number is thicker, 8000# is the most thin.The jade is ground and polished, with coarse size grinding, small size after polishing the jade is very bright.Polished glass, gem, jade, stainless steel, stone, can achieve mirror effect.