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The application of laser cleaning machine in stone cleaning

Superwave Laser Technology Co.,Ltd | Updated: Oct 27, 2017

The laser has the characteristics of high brightness, high directivity, high monochromatic and high coherence, which is unmatched by ordinary light source. Using the high brightness of the laser, it can generate tens of millions or even tens of thousands of degrees of temperature near the focus after the lens is focused. The high directivity of the laser enables the laser to carry out long distance transmission. The laser is very monochromatic and has a single wavelength, which is favorable for the selection of focus and wavelength.

Laser cleaning in terms of its cleaning mechanism, and can be divided into two categories: one kind is to use clean substrate (also known as the mother) and surface attachments (dirt) on a particular wavelength laser energy, with large differences between the absorption coefficient. Radiation to the surface of the laser energy, most is absorbed by surface attachments to make heat gasification evaporation or instantaneous expansion, and form the surface of the steam flow to drive from the surface, to do cleaning. And the substrate, because the laser absorption of the wavelength is very small, will not be damaged. For such laser cleaning, selecting the appropriate wavelength and controlling the laser energy is the key to achieve safe and efficient cleaning. Another kind is applicable onto substrate and surface attachment, laser energy absorption coefficient difference is not big, or the substrate of the coating is heated to form acid vapour is sensitive, or coating is heated after cleaning method will produce toxic substances, and so on and so forth. The method usually USES a pulse laser with high power and high repetition rate to hit the cleaned surface, which converts some beams into sound waves. Sound waves hit the lower surface of hard, after nearly back part and the laser incident sound waves small explosion, pressed into powder by crushing, coating, be vacuum pump clearance, and the substrate under won't damage.

Laser cleaning and mechanical abrasion cleaning, chemical corrosion cleaning, liquid solid strength impact cleaning, high frequency ultrasonic cleaning and other traditional cleaning methods have obvious advantages. It is efficient, fast and cost low, the thermal load and mechanical load of the substrate are small, and the cleaning is non-damage. Waste can be recycled without environmental pollution; Safe and reliable, do not harm operators health; Multi-function, can remove various thickness, different components of the coating; The cleaning process is easy to realize automatic control and realize remote control cleaning.