Screen printing belongs to stencil printing, which is called the four printing methods together with lithography, embossing and gravure printing. Hole printing includes transcription, perforated pattern, spray and screen printing, etc. The principle of stencil printing is: the printing plate (the perforations that can pass the ink are made on the base of the paper film plate or other plates). When printing, the ink is transferred to the substrate (paper, ceramics, etc.) through the perforations of the stencil under a certain pressure. ) To form an image or text.

　　The working principle of the automatic screen printing machine:

　　Screen printing is composed of five elements, namely screen printing plate, squeegee, ink, printing table and substrate. The basic principle of screen printing is to use the basic principle that the screen printing plate has the ink through the mesh of the graphic part and the non-image and text part is impermeable to the ink. When printing, pour ink on one end of the screen printing plate, and use a squeegee to apply a certain pressure on the ink position on the screen printing plate while moving toward the other end of the screen printing plate. The ink is squeezed from the mesh of the graphic part to the substrate by the squeegee while it is moving.

　　Due to the viscosity of the ink, the imprint is fixed within a certain range. During the printing process, the squeegee is always in line contact with the screen printing plate and the substrate, and the contact line moves with the movement of the squeegee, due to the screen printing plate and the substrate. Keep a certain gap between them, so that the screen printing plate during printing produces a reaction force against the squeegee through its own tension. This reaction force is called resilience. Due to the effect of resilience, the screen printing plate and the substrate are only in mobile line contact, while other parts of the screen printing plate and the substrate are in a disengaged state. The ink and the screen are broken to ensure the printing dimensional accuracy and avoid smearing the substrate. When the squeegee is lifted after scraping the entire layout, the screen printing plate is also lifted, and the ink is gently scraped back to the original position. So far is a printing trip.