Working principle of automatic screen printing machine

Update:28 May 2020

 

The working principle of the automatic screen printing machine: use the basic principle of the screen and screen part of the screen to penetrate the ink, and the non-graphic part of the screen does not penetrate the ink to print. During printing, pour ink on one end of the screen printing plate, apply a certain pressure on the ink portion of the screen printing plate with a scraper, and move toward the other end of the screen printing plate at the same time. The ink is squeezed by the scraper from the mesh in the graphic part to the substrate while 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 plate and the substrate. The contact line moves with the movement of the squeegee. Because the screen plate and the substrate Maintain a certain gap between them, so that the screen plate during printing generates a reaction force against the scraper through its own tension. This reaction force is called the rebound force.

Due to the resilience, the screen printing plate and the substrate are only in mobile line contact, while the other parts of the screen printing plate are in a detached state from the substrate. The ink and the screen are broken, which guarantees the dimensional accuracy of the printing and avoids smearing the substrate. When the squeegee is lifted after scraping the entire plate, the screen printing plate is also lifted, and the ink is gently scraped back to the initial position, which is a printing stroke.