How does laser cleaning equipment remove paint? To understand how laser cleaning removes paint, you must first understand the cleaning mechanism of laser cleaning machines.
The cleaning process of laser cleaning equipment relies on the light pulses generated by the laser, based on photophysical reactions caused by the interaction between the high-intensity beam, the short-pulse laser and the contamination layer.
Laser cleaning machines play an important role in many industries, such as automobile manufacturing, semiconductor wafer cleaning, precision parts processing and manufacturing, building exterior wall cleaning, cultural relics protection, circuit board cleaning, precision parts processing and manufacturing, liquid crystal display cleaning, Gum residue removal, grease removal, paint removal, and more.
Laser paint removal is one of many application scenarios for laser cleaning machines.
The paint applied to the metal surface is equivalent to a special layer of plasma, which protects the metal from corrosion and oxidation. Plasma, on the other hand, is only generated when the energy density is above a threshold, which depends on the contamination or oxide layer being removed. This threshold effect is important for effective cleaning while keeping the substrate material safe. There is also a second threshold for the appearance of plasma. If the energy density exceeds this threshold, the substrate material will be destroyed. In order to carry out effective cleaning on the premise of ensuring the safety of the substrate material, the laser parameters must be adjusted according to the situation, so that the energy density of the light pulse is strictly between the two thresholds.
Each laser pulse removes a certain thickness of the contamination layer. If the contamination layer is thick, multiple pulses are required for cleaning. The number of pulses required to clean the surface depends on the degree of surface contamination. An important consequence of the two thresholds is the self-control of cleaning. Light pulses with an energy density above the first threshold will reject contaminants until they reach the substrate material. However, since its energy density is below the destruction threshold of the substrate material, the substrate is not damaged.
Based on the above, when using laser cleaning equipment to clean paint on metal surfaces, the threshold is to be well controlled. Only when the threshold is appropriate can laser cleaning be performed. When the threshold cannot be set, it means that the laser cleaning equipment cannot meet the cleaning requirements. This is why the laser Cleaning equipment is not one of the reasons for everything. However, with the continuous deepening of laser research and development, the functions of laser cleaning equipment will become more and more powerful, and it may reach the point where everything can be washed.
