New energy vehicles are quieter than conventional internal combustion engine vehicles, and the development of new energy vehicles also imposes stricter requirements on tire noise control. New energy vehicle tires can better adapt to the needs of new scenarios by improving the rubber formula, tire aspect ratio, tire volume, tread material, and tread pattern.
As a “green” cleaning process, laser cleaning technology has a good application in the production and manufacturing process of silent tires. The focused high-energy laser beam is used to irradiate the surface of organic polymer materials to cause physical and chemical changes on the surface of the material, thereby changing its performance. It can effectively improve the tire quality and production process, improve the matching between the tire and the body, and improve the overall performance of the vehicle. By coating the inner wall of the tire with a soft solid gel-like polymer composite material, the explosion-proof, anti-puncture, and leak-proof functions are realized. At the same time, a layer of polyurethane sponge is pasted on the surface of the leak-proof rubber to achieve sound insulation and heat insulation, and the mute effect of absorbing cavity noise .
Laser cleaning can effectively remove the residual release agent on the inner wall of the tire, improve the coating of composite materials and the adhesion of polyurethane sponge. The cleaning process does not require consumables, does not damage the tires, has high efficiency and good consistency, and can realize automatic cleaning.
By selecting pulsed laser equipment and formulating a reasonable process flow, the sample is evaluated. Through the dyne pen test, the surface tension values under different parameters were obtained. The results show that different process parameters (laser energy density, processing efficiency) will affect the surface tension of the inner wall of the tire, and the process parameters should be reasonably formulated for the production process of the silent tire. Through the test, the laser cleaning is uniform, and the substrate damage is far from meeting the requirements. After cleaning, the friction coefficient of the inner surface increases by >37mN/m, and the surface tension reaches 40dyne/cm.
