Large size solder paste printing machine is harmless to human body, but the solder paste itself contains a variety of metal components. The lead-free solder paste and lead-free solder paste currently used are generally divided into two categories. For the professional problems of solder paste printing machine, first of all, the preheating process must be carried out before welding the circuit board. This process is very important and skilled workers know it very well. If the flux contains some volatile substances, the preheating of this process can remove volatile substances and reduce impurities. In addition, the preheating process can also ensure that parts with different heating rates are heated more evenly during formal heating.

The inspection of each part before and after the operation of the solder paste printer is also the premise to ensure normal welding, especially the control of the use of solder paste and the adjustment of the scraper strength play a key role in the success of welding. In the working process of solder paste printer, it will be applied to the matching of a series of workpieces, which is more complex than other welding processes. What needs to be strictly controlled is that it plays a key role in the solder paste. The continuous mixing of solder paste ensures the normal operation of the whole machine. In other words, the solder paste is evenly applied to the steel mesh through the force of the scraper. In this process, we have a very accurate grasp of the welding position.