Application of Laser Cleaning

2019-07-23 keywords:More

Laser cleaning can be used not only to clean organic pollutants, but also to clean inorganic substances, including metal corrosion, metal particles, dust and so on. Here are some practical applications. These technologies are very mature and have been widely used.
1. Mold cleaning:
Every year hundreds of millions of tires are manufactured by tire manufacturers all over the world. The cleaning of tire moulds in the production process must be fast and reliable to save downtime. Traditional cleaning methods include sand blasting, ultrasonic or carbon dioxide cleaning, but these methods usually have to be transferred to the cleaning equipment after several hours of cooling of the high-heat die. It takes a long time to clean, and it is easy to damage the accuracy of the die. Chemical solvents and noise can also cause safety and environmental problems. Using laser cleaning method, because laser can be transmitted by optical fibers, it has great elasticity in use; because laser cleaning method can be connected by optical fibers, it can guide light to the dead corner of the die or the parts that are not easy to clean, so it is easy to use; because rubber is not gasified, it will not produce toxic gases. Affect the safety of working environment. Laser cleaning technology has been widely used in the tire industry in Europe and the United States. Although the initial investment cost is high, it can quickly recover the benefits obtained in saving standby time, avoiding die damage, working safety and saving raw materials. According to the cleaning test carried out by Quantel's LASERLASTE laser cleaning system on the production line of Shanghai Dual-Qian Heavy-Duty Tire Company, a set of large-scale heavy-duty tire moulds can be cleaned online in only two hours. Compared with conventional cleaning methods, the economic benefits are obvious.
The anti-sticking elastic film on the dies of food industry needs to be replaced regularly to ensure hygiene. Laser cleaning without chemical reagents is also particularly suitable for this application.

2. Cleaning of weapons and equipment:
Laser cleaning technology is widely used in weapon maintenance. Using laser cleaning system, rust and pollutants can be removed efficiently and quickly, and the cleaning parts can be selected to realize the automation of cleaning. Laser cleaning is not only cleaner than chemical cleaning process, but also almost harmless to the surface of the object. By setting different parameters, Quantel's LASERLASTE can also form a dense oxide protective film or metal melting layer on the surface of metal objects to improve surface strength and corrosion resistance. Laser scavenging waste basically does not pollute the environment, and can also be operated over a long distance, effectively reducing the health damage to operators.

3. Removal of old aircraft paint:
Laser cleaning systems have long been used in the aviation industry in Europe. The surface of the aircraft needs to be repainted after a certain period of time, but the old paint needs to be completely removed before spraying. The traditional mechanical paint removal method is easy to cause damage to the metal surface of aircraft, which brings hidden dangers to safe flight. If multiple laser cleaning systems are used, the paint layer on the surface of an A320 Airbus can be completely removed within two days without damaging the metal surface.

4. Cleaning of building exterior walls:
With the rapid development of China's economy, more and more skyscrapers have been built, and the problem of cleaning the exterior walls of buildings has become increasingly prominent. LASERLASTE laser cleaning system provides a good solution for cleaning the exterior walls of buildings through optical fibers up to 70 meters long. It can pollute various kinds of stone, metal and glass. The cleaning efficiency of the product is many times higher than that of conventional cleaning. It can also remove black spots and color spots on various stone materials of buildings. The experiment of LASERLASTE laser cleaning system on buildings and stone tablets in Shaolin Temple in Songshan shows that the effect of laser cleaning on protecting the appearance of ancient buildings is very good.

5. Cleaning in the Electronic Industry
The electronics industry uses laser to remove oxides: the electronics industry needs high-precision decontamination, especially suitable for the use of laser to remove oxides. Before the circuit board is welded, the pins of components must be thoroughly removed to ensure the best electrical contact, and the pins can not be damaged during the decontamination process. Laser cleaning can meet the requirements of use, and the efficiency is very high. A pin needs only one laser irradiation.

6. Precise Deesterification Cleaning in Precision Machinery Industry:
Precision machinery industry often needs to remove esters and mineral oils used for lubrication and corrosion resistance on parts, usually by chemical methods, and chemical cleaning often still has residues. Laser de-esterification can completely remove esters and mineral oils without damaging the surface of parts. The removal of pollutants is accomplished by shock wave. The explosive gasification of oxide thin layer on the surface of parts forms shock wave, which leads to the removal of pollutants rather than mechanical interaction. Material is thoroughly deesterified for cleaning mechanical parts in aerospace industry. Laser cleaning can also be used for oil ester removal in mechanical parts processing.

7. Pipeline cleaning in nuclear power plant reactor:
Laser cleaning system is also applied to the cleaning of nuclear power plant reactor pipelines. It uses optical fibers to introduce high-power laser beams into the reactor, which can directly remove radioactive dust and facilitate the cleaning of materials. And because of the long-distance operation, the safety of staff can be ensured.
In summary, laser cleaning plays an important role in many fields, such as automobile manufacturing, semiconductor wafer cleaning, precision parts manufacturing, military equipment cleaning, building exterior wall cleaning, cultural relics protection, circuit board cleaning, precision parts manufacturing, liquid crystal display cleaning, chewing gum remnants removal, etc. Areas can play an important role.