The steel mesh thickness specifications include 0.1mm, 0.12mm, 0.13MM, 0.15mm, 0.18mm, 0.2mm, etc. at present, the steel mesh thickness of 0.12mm accounts for the majority.

At present, it is an indisputable fact that China has become the manufacturing base of global electronic information products, and this position will not change for a long time in the future. The output of smart phones, smart TVs, smart wearable watches, air conditioners, refrigerators, cars and other products made in China has ranked first in the world. While the performance of consumer electronics and automotive electronics is rising, people's demand for miniaturization of components is also increasing. As the electronic manufacturing industry becomes more and more active. In SMT production line, the material receiving belt of SMT consumables is facing many problems, such as severe technology, standards and so on. Realize the dream of becoming a powerful country in electronic manufacturing, take the road of independent research and development of SMT production line consumables, and concentrate superior forces to break through the dilemma of SMT production line consumables.

SMT is a technology that chip components are assembled and welded on the surface of printed circuit board. Compared with the traditional through-hole assembly technology, this technology has the advantages of high assembly density, small product volume (volume reduction of 40% - 60%), light weight (weight reduction of 60% - 80%), high reliability, strong anti-seismic ability, easy automation and so on. Network communication, computer and consumer electronics are the main application fields. Other fields also include automotive electronics, medical electronics and so on.

How do we judge the printing quality? To ensure the good quality of solder paste printing machine, we should do these five points.

1. Accuracy requirements

2. The printing area should be suitable

3. The thickness of the solder paste requires that the thickness of the solder paste demoulded should be appropriate. 4. The shape of the solder paste requires that the surface of the solder paste demoulded is flat, the edge is clear, and there is no sharp point. 5. The quality of the steel mesh wiping paper is good (one power supply esocoo steel mesh wiping paper)

Therefore, it is necessary to achieve stable and continuous printing in the correct position, with appropriate amount and shape of solder paste and high-quality one electricity steel mesh wiping paper. To achieve these, the requirements of our printing machine include printing performance and demoulding performance.

(1) First, printing performance: at the opening of the steel mesh, the solder paste shall be completely filled into the mesh of the steel mesh. It is required that no solder paste overflows the mesh of the steel mesh or the amount of solder paste filled into the mesh of the steel mesh is not enough;

(2) The second demoulding performance refers to that after the solder paste is completely filled in the mesh of the steel mesh, the PCB is separated from the steel mesh through the scraper rising and small, and the lower frame of the platform, so that the solder paste filled in the mesh of the steel mesh can be separated from the steel mesh and printed on the corresponding pad on the PCB. It is required that the amount of solder paste demoulded on the pad is stable and appropriate, the surface of solder paste is flat and the edge is clear. Third, the wiping paper of YiDianTong steel mesh is a special wiping paper for SMT printing of circuit boards in the electronic industry. It can effectively remove the excess solder paste and red glue attached to the steel mesh and circuit board of the printing machine, and keep the electronic circuit board spotless, so as to greatly reduce the scrap rate and greatly improve the production efficiency and product quality.

After the completion of solder paste printing and scraper movement, the quality of solder paste filling is judged by the surface antigen of steel mesh. Demoulding is like Newton's theory. When the scraper and PCB leave the steel mesh, demoulding is completed. However, in the demoulding process, due to the influence of the steel mesh tension, the solder paste will be pulled by the opening side of the steel mesh and the tin plate, and begin to shear and deform. The place close to the pad is basically unaffected.