Analysis of laser paint removal technology and application fields
Coating is an important means of protecting metal materials in the industry, and can play a role in protection, decoration, marking and other special effects on objects. Due to the erosion of air, moisture and temperature for a long time, the paint is easy to fall off, which affects the appearance and prevents metal corrosion from declining. It needs to be repainted on a regular basis. Paint removal is the most important process before repainting.
Laser cleaning
Laser paint removal is a process in which the paint part to be cleaned is irradiated by a laser beam, and the paint layer on the surface is instantly evaporated or expanded and peeled off, so as to achieve a clean process.
Features of Laser Cleaning
1. Non-contact
It is easy to clean the corners that are difficult to reach by traditional cleaning methods, such as special-shaped parts, holes, and grooves.
2. Fine processing
Selective cleaning of the paint on a certain part of the substrate is possible.
3. Environmental protection and no pollution
No chemicals are required; the solid dust layer from paint removal can be recycled through a vacuum system.
4. Clean and undamaged
It can remove the surface coating of various substrates and achieve high cleanliness. Short-term impact will not heat the surface of the substrate and will not damage the substrate.
5. Low cost
Comparison of laser paint removal and traditional paint removal methods
paint removal method
Mechanical grinding
easy to use
Time-consuming, low efficiency, difficult to control the surface quality after grinding, and great harm to the environment and the operator's body.
Shot Peening and Paint Removal
Effective cleaning, suitable for paint removal on metal and composite surfaces
It has high requirements on the plant and the environment, so it requires high equipment investment costs, and also has certain damage to the environment and operators.
chemical method
High efficiency for large area paint cleaning
It is only suitable for removing paint on the surface of metal parts, and it is used for removing paint on the surface of composite materials, which is easy to cause damage to the workpiece.
Ultrasonic paint removal
Good cleaning effect
The cleaning of sub-micron dirt particles is powerless, the size of the cleaning tank limits the scope and complexity of the processed parts, and the drying of the workpiece after cleaning is also a major problem.
Laser paint removal
Environmentally friendly and pollution-free, suitable for removing paint on the surface of various substrates, without damage to the substrate
Since it is cleaned by laser irradiation, cleaning cannot be performed for places that cannot be irradiated by laser light.
Application of Laser Paint Removal
As a technical means, laser paint removal has a wide range of applications, covering aerospace, automobile manufacturing, rail transit, shipbuilding, steel manufacturing, and electronics industries.
Aircraft engine filter laser cleaning
In the field of aerospace, aircraft surface paint removal has become an important part of aircraft overhaul. Laser paint removal technology can quickly and effectively remove the surface paint layer of aircraft composite parts, solving the problems of traditional chemical paint removal methods that are difficult to handle chemical products and reagents on the substrate. Cause additional damage and other shortcomings, greatly shorten the maintenance cycle and reduce maintenance costs.
Auto parts laser paint removal
Selective paint removal is one of the many applications of laser cleaning. In the automotive industry, it is sometimes necessary to remove the top layer of paint while protecting the primer. Typically, the weathered top coat of a vehicle needs to be completely removed before new paint is applied. Since the physical and chemical properties of the top layer of paint are different from the primer, the power and frequency of the laser can be set to remove only the top layer of paint. Since the laser has no mechanical, chemical or thermal effects on the primer, the primer remains intact. This ensures the corrosion resistance of the primer. Laser paint removal is also widely used in the cleaning of auto parts.
Rail
During the maintenance and repair of rail transit equipment, there are a large number of components that need to be cleaned. Key components installed or suspended outside the vehicle body, such as axles, gearboxes, brake discs, etc., need to be removed from oil, rust, paint and other contaminants. Due to the variety of dirt, different cleaning methods are required, and even parts are disassembled, and the cleaning process is long. There is also an urgent need for an environmentally friendly and efficient cleaning method. Laser cleaning can not only effectively remove rust, oil, paint, oxide layer, etc. on the surface of materials, but also can be used for multiple purposes. Backpack, mobile and stationary equipment can also be customized according to needs to meet the cleaning needs of different occasions of rail transit.
Shipbuilding
With the rapid development of my country's economy and the rapid growth of foreign trade, the number of ships in China has increased significantly, most of which use sandblasting to remove paint, causing serious pollution to my country's rivers and offshore oceans. Laser cleaning technology solves the shortcomings of traditional shot peening methods such as a lot of noise, pollutants, and potential harm to construction workers, making cleaning more green and environmentally friendly.
