The full name of screen printing machine is "screen printing machine", which is a kind of equipment that prints solder paste or paste onto PCB pads through screen. Can be divided into vertical screen printing machine, oblique arm screen printing machine, rotary screen printing machine, four-column screen printing machine and automatic screen printing machine. Mainly used in electronic processing industry, screen printing signs of printed circuit boards, signs of instrument shell panels, solder paste printing in circuit board processing, etc. Screen printers are divided into vertical screen printers, oblique arm screen printers, rotary screen printers, four-column screen printers and automatic screen printers. Features of vertical screen printing machine: it is used for high-precision printing, such as high-tech electronics industry, overprinter multi-color, dot printing and so on. Compared with oblique arm screen printing machine, it has low efficiency but high accuracy; The characteristics of oblique arm screen printing machine: used in packaging industry, or local UV printing, high efficiency, but low accuracy; Features of rotary screen printing machine: For clothing industry or CD industry, rotary screen printing machine can be used in industries that are difficult to locate; Features of four-column screen printing machine: it is used in large-area industries, such as decoration, large glass and other industries. The automatic screen printing machine is characterized by roll-to-roll printing of soft materials such as PET, PP, PC and PE. By feeding, printing, drying and other processes, it is the best choice for mass production; Features of automatic elliptical screen printing machine: it is mainly suitable for the printing of garment cutting pieces, and can print slurry such as mucilage, water slurry and ink. Working principle: the power is transmitted by the transmission mechanism, so that the scraper squeezes the ink and the screen printing plate in motion, and the screen printing plate and the substrate form an impression line. Due to the tension of the screen N 1 and N2, a force F2 is generated on the ink scraper, so that the screen printing plate does not contact the substrate except the nip, and the ink moves through the mesh under the action of the squeezing force F 1 of the ink scraper.