What about the key points for selecting flour mesh?...

What is silk screen? What is a roll screen?

1. Working principle of flat screen flat polyester bolting cloth machine.

A. Working cycle program of flat screen printing machine. Take the polyester mesh screen flat screen type flat-type monochrome semi-automatic hand screen printing machine as an example. Its working cycle is: feeding piece → positioning → falling plate → falling to the ink plate, rising back to the ink plate → scraping ink Stroke → rise to ink board → drop back to ink board → lift version → return ink stroke → release positioning → receive. In the continuous cycle action, as long as the function can be realized, the time occupied by each action should be as short as possible to shorten the synchronization of each work cycle and improve the work efficiency.

B. Imprint line. During the printing process, the ink is pressed against the ink plate and the screen printing plate, so that the screen printing plate forms a contact line with the substrate, which is called an embossing line. This line is at the edge of the squeegee, and numerous embossed lines form the printed surface. It is very difficult to achieve an ideal embossing line because the printing stroke is a dynamic process.

C. The working principle of screen printing machine. Taking the commonly used hand-screen screen printing machine as an example, the working principle of the screen printing machine can be described as follows: the transmission mechanism transmits power, and the squeegee plate squeezes the ink and the screen printing plate during the movement to make the screen The printing plate and the substrate form an embossing line. Since the screen has the tensions N1 and N2, the force F2 is generated on the squeegee plate, and the resilience makes the screen printing plate not contact with the substrate except the embossing line. Under the action of the pressing force F1 of the squeegee, it is leaked from the moving nip to the substrate through the mesh.

During the printing process, the screen printing plate and the squeegee plate are moved relative to each other, and the squeezing force F1 and the resilience force F2 are also synchronously moved. Under the action of the resilience force, the screen is returned to the substrate in time to avoid contact with the substrate. The blot is dirty. That is, the screen is constantly in the process of deformation and rebound during the printing process.

2. The working principle of flat screen curved screen printing machine. Flat screen curved screen printing is a screen printing on a flat or conical surface with a flat screen. Under certain conditions, it is also possible to screen the elliptical surface, the drum surface, the curved surface and other curved surfaces (for example, our common cups, tubes, and bottles have a printing pattern between 180 degrees and 360 degrees).

The dry mesh curved screen printing machine is a machine that prints the above curved surface using a flat screen.

The working principle of the flat screen printing machine a-roller bearing b-shaft will support c-inlaid bearing. During printing, the flat screen plate moves with the substrate while the squeegee is stationary. The flat screen printing plate is clamped on the frame by a flat screen curved screen printing machine with a uniform motion, and the substrate placed on the supporting device rotates due to the friction of the screen. The line speed of the curved substrate at the embossing line coincides with the moving speed of the flat screen printing plate to realize the squeegee printing.

The principle of printing on the surface of a cone is basically the same as the principle of printing on the surface of a cylinder, except for the shape of the screen printing plate and the form of movement of the screen printing plate. When making a screen printing plate for the surface printing of a cone, first draw out the developed surface of the cone surface, and determine the center of the fan shape according to the developed image, and then select the appropriate mesh frame to make the screen printing plate.