Red glue cleaning is an important link in the whole red glue process, and it is also a common technical difficulty in the entire electronic industry. Its cleaning effect directly affects the process quality. If the cleaning is not complete, it is easy to cause the fine holes of the steel mesh to become smaller or even blocked, resulting in insufficient amount of printing glue and the possibility of falling components and scrapping the patch steel mesh.

In view of the large hole depth and diameter of the fine holes of the red glue steel mesh, it is usually impossible to thoroughly clean the red glue residue on the inner wall of the fine holes by simple manual or pneumatic spraying equipment. Long-term incomplete cleaning will make the red glue residue on the inner wall accumulate more and more, resulting in the small holes becoming smaller or even blocked. The manual needle connection method can not completely solve the problem, and it is very easy to damage the laser steel mesh by scratching the mesh holes to form burrs.

At present, the commonly used manual and pneumatic spray cleaning equipment using organic solvent requires manual repeated blowing and needle passing, which is time-consuming, inefficient and poor. The volatilization of organic solvents can easily enter the respiratory system of human body, which will cause great harm to human body, and there are also hidden dangers of flammability and explosion. Therefore, the cleaning of red glue steel mesh is a common technical difficulty in the industry at present.

Due to the low efficiency and poor effect of cleaning SMT steel mesh with organic solvent, there is room for improvement in the process. Therefore, a new red glue steel mesh cleaning technology has been launched in the market: the ultrasonic steel mesh cleaning machine is equipped with water-based cleaning agent to thoroughly and effectively clean the red glue steel mesh, which has given a satisfactory answer to the industry. The cleaning principle of red glue steel mesh cleaning technology is to use the physical “cavitation effect” of ultrasonic wave to produce tens of thousands of tiny bubbles in the cleaning solution. The formation, growth and rapid rupture of such tiny bubbles will rapidly peel off the dirt attached to the surface of the object, cracks and deep holes, fine holes and blind holes, and mechanically remove it. In combination with the solubility of water-based cleaning agent, it will chemically dissolve the red glue, so that the epoxy resin and hardener in the red glue components Pigments, fillers, etc. are dissolved in the cleaning agent, and the cleaning agent is recycled and filtered in the ultrasonic equipment, so as to achieve the effect of rapid cleaning.

Due to its safety, environmental protection, non combustion and non-volatile characteristics, the water-based detergent can completely eliminate the potential safety hazards caused by solvent based detergent in the past; Combined with ultrasonic cleaning equipment, it can solve the conventional problem of poor cleaning of pneumatic spray equipment and unable to penetrate the red glue residue in deep and fine holes. The cleaning process of red glue steel mesh is as follows: manually blow the offline laser steel mesh through with compressed air at one time, and then place it in the special ultrasonic cleaning equipment to complete the cleaning with one key. The cleaning process is simple, practical and realizable. The cleaning effect is good. There is no red glue residue on the inner wall of the mesh. The mesh permeability can reach 100%. The total cleaning time is about 15 minutes, which can greatly reduce the cleaning time and improve the cleaning efficiency. The application of red glue steel mesh cleaning process effectively improves the working environment of red glue cleaning, which is safe and environmentally friendly, completely eliminates the potential safety hazards of flammability and explosion, and avoids the risk of chronic poisoning of operators’ solvents; At the same time, the water-based detergent is non-volatile and recycled, which can save the cleaning cost and lower the comprehensive practical cost.

The new technology of red glue cleaning has been widely used by many well-known large enterprises, and it is also a relatively effective cleaning process so far. The successful application of red glue steel mesh cleaning process mainly depends on the perfect combination of water-based cleaning agent, comprehensive advanced technology and special ultrasonic cleaning equipment. At present, there are not many enterprises with this technical ability in the market. How to effectively select the appropriate suppliers is the fundamental to quickly solve the problem of red glue steel mesh cleaning. Shenzhen Heming Technology Co., Ltd., the chairman of the Editorial Committee of the “IPC water-based cleaning Guidance standard”, has launched water-based cleaning applications and ultrasonic water-based cleaning equipment for electronic processes in China. It has independent property rights and is at the international advanced level.