Traditional cleaning industries mostly use chemical agents or mechanical methods. With the increasingly strict environmental protection laws and regulations in our country and the increasing awareness of environmental protection and safety, the industrial production cleaning of chemicals is gradually showing disadvantages and will be replaced by laser cleaning. Laser cleaning has the characteristics of no grinding, non-contact, no thermal effect and suitable for objects of various materials, and is considered to be the most reliable and effective solution.

Laser cleaning technology refers to the process of using a high-energy laser beam to irradiate the surface of the workpiece to instantly evaporate or peel off the dirt, rust or coating on the surface, so as to achieve a clean process. The laser is no different from the light around us (visible light and invisible light), except that the laser uses a resonant cavity to gather the light in the same direction, and has a simpler wavelength and better coordination performance, so theoretically all All wavelengths of light can be used to form lasers, but in reality, there are not many media that can be excited, so the laser light sources that can generate stable and suitable for industrial production are quite limited. Widely used are Nd:YAG laser, carbon dioxide laser and excimer laser.

The mechanism of laser cleaning is mainly based on the fact that after the pollutants on the surface of the object absorb laser energy, either vaporize and volatilize, or are instantly thermally expanded to overcome the adsorption force of the surface on the particles, so that they can be separated from the surface of the object, thereby achieving the purpose of cleaning. To sum up, it roughly includes four aspects: laser vaporization decomposition, laser peeling, thermal expansion of dirt particles, substrate surface vibration and particle vibration; and laser cleaning is often the result of the simultaneous action of multiple mechanisms.

According to the analysis of a large number of experimental results, it is believed that the laser cleaning mechanism varies according to the difference between the surface attachments and the thermophysical parameters of the substrate. When the thermophysical parameters of the surface attachment and the base material are quite different, the laser cleaning mechanism includes: ablation vaporization, thermal vibration and thermal shock mechanism and sonic vibration mechanism, such as laser cleaning paint layer and rubber layer. When the thermophysical parameters of the surface attachment and the base material are not very different, the ablation and vaporization mechanism is mainly at work, such as laser rust removal.

Jinan Gold Mark CNC Machinery Co., Ltd. is a high-tech industry enterprise specialized in researching, manufacturing and selling the machines as follows: Laser Engraver, Fiber Laser Marking Machine, CNC Router. The products have been widely used in advertisement board, crafts and molding, architecture, seal, label, woodcutting and engraving, stonework decoration, leather cutting, garment industries, and so on. On the base of absorbing the international advanced technology, we provide the clients the most advanced production and perfect after-sale service. In recently years, our products have been sold not only in China, but also as far as Southeast Asia, Middle east, Europe, South America and other overseas Markets.

Email:   cathy@goldmarklaser.com

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