Flat screen printing machine professional printing mobile phone cover, mobile phone lens, mobile phone touch screen, light guide plate OGS/TP/CG/LTD touch screen, is a device that prints solder paste or patch leakage on the PCB pads through the screen. So flat How does the screen printing machine work?
1. The working cycle of flat screen printing machine. Take a monochrome flat-panel monochrome semi-automatic hand printing machine as an example, a working cycle is: slicing → positioning → imprinting → down to the inked plate, lift the ink plate → ink stroke → ink upper plate → ink return plate → lift plate →Ink strokes→lift positioning→receiver.
In the continuous action cycle, as long as the function can be realized, the shorter the time for each action, the better, shorten the same period of each work cycle and improve work efficiency.
2. Clamp the thread. When working in the screen printing machine, the ink is squeezed out of the ink and the screen printing plate, so that the screen printing plate and the substrate form a contact line, which is called a nip. This line is on the edge of the doctor's blade, and countless nip forms the printing surface. The ideal nip line is difficult to achieve because the printing stroke is a dynamic process.
3. The working principle of the screen printing machine. Taking the commonly used hand-cranked flat screen printing machine as an example, the working principle of the screen printing machine can be described as follows: the transmission mechanism transmits power so that the squeegee squeezes the ink and the screen printing plate during the movement to form an occlusion between the screen printing plate and the substrate. , The screen has tension N1 and N2, the force F2 acting on the squeegee, the rebound makes the screen plate not contact the substrate except for the impression line, the ink is under the squeeze force F1 of the squeegee, and the squeegee moves from The nip is slid onto the substrate through the mesh.