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激光清洗, in terms of its mechanism for mold cleaning, uses a clean substrate (also called a precursor) and a surface attachment (soil) to have a very different absorption coefficient for a certain wavelength of laser energy. Most of the laser energy radiated to the surface is absorbed by the surface deposits, which is heated or vaporized and evaporated, or instantaneously expanded, and is driven by the vapor stream formed on the surface to separate from the surface of the object for cleaning purposes. Specifically used for tire mold cleaning, the mold absorbs laser light of a specific wavelength, the energy is very small, and will not cause damage. The dirt on the surface of the mold (sulfide, inorganic oxide, silicone oil, carbon black, 等等) absorbs a large amount of energy and is instantly expanded. Vaporization evaporation, away from the mold surface, to achieve the effect of cleaning. The main methods of 激光清洗 are:

1) laser dry cleaning method, 那是, direct radiation decontamination using pulsed laser;

2) 激光 + liquid film method, 那是, first deposit a liquid film on the surface of the substrate, and then decontaminate with laser radiation;

3) 激光 + 惰性气体法, 那是, while the laser radiation is being used, the surface of the substrate is purged with an inert gas.

当污垢从表面剥落时, 气体会立即将其吹离表面，避免表面再次污染和氧化;

4) Use a laser to loosen the dirt and then clean it with a non-corrosive chemical method. Currently, the first three methods are commonly used. The fourth method is only found in the cleaning of stone artifacts. The advantages of laser cleaning are high efficiency, quickness, 低成本, low heat load and mechanical load on the mold, and will not damage the workpiece to be cleaned; waste can be recycled without environmental pollution; safe and reliable, without damaging the health of the operator; It can remove dirt of various thicknesses and different compositions; the cleaning process is easy to achieve automatic control, remote cleaning and so on. The disadvantages of laser cleaning are high equipment investment, high technical level for maintenance and use, technology monopolized by foreign countries, and subject to technical services and parts supply.