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Screen printing machine works
- May 12, 2018 -

Taking the commonly used hand-shaped screen plane screen printing machine as an example, the working principle of the screen printing machine can be described as follows: the power is transmitted through the transmission mechanism, so that the squeegee presses the ink and the screen printing plate in the movement to make the screen The plate and the substrate form an imprinting line. Since the screen has tensions N1 and N2, a force F2 is generated on the squeegee, and the resilience causes the screen plate not to touch the substrate except for the imprinting line. The ink is Under the action of the squeegee's squeezing force F1, the squeegee is leaked from the moving nip to the substrate through the mesh.

During the printing process, the screen printing plate and the squeegee are moved relative to each other, and the squeezing force F1 and the resilience F2 are also moved synchronously. Under the action of the resilience, the screen is returned to contact with the substrate in time to avoid contact. Imprinted dirty. That is, during the printing stroke, the screen is continuously deformed and rebounded. After the squeegee completes the unidirectional printing, the squeegee is detached from the substrate together with the screen plate. At the same time, the squeegee is returned to the ink to complete a printing cycle. The distance between the upper surface of the substrate and the back surface of the screen plate after ink return is called the same plate distance or net distance, and generally should be 2-5 mm. When printing by hand, the operator's technique and skill level directly influence the formation of the nip.