Effect of Screen on Print Quality
1. The influence of screen mesh on printing quality
The choice of mesh size on the one hand is related to the quality requirements of the product pattern, and on the other hand it is closely related to the performance of the glaze. In order to obtain high-quality fine patterns, high mesh screens are generally available. For a certain viscosity of the enamel, if the screen mesh is too dense. If it is too small, it will be difficult to penetrate the flower glaze through the screen mesh to reach the surface of the brick blank during printing. Even if it can be printed on the surface of the brick blank, the effect of poor flower seepage is caused due to the limited number of enamel flowers, and the pattern is light and fuzzy. If the mesh of the screen is too large, the quantity of the penetrating enamel that passes through the screen to reach the surface of the body is large, and it is easy to spread outward on the surface of the body, which also causes the pattern to be blurred. In the actual production, the number of screen meshes should be reasonably selected according to the viscosity of the enamel glaze. For the larger viscous osmotic glazes, the screen mesh openings can be appropriately large; and for the lower viscous osmotic glazes, the wire High Precision Ceramic Network Resistor Substrate Plate mesh net Holes should be smaller. In general, the screen mesh can be controlled at 60-120 mesh.
2. Effect of Screen Tension on Printing Quality
The elasticity of the screen has a certain influence on the printing process and print quality. If the screen is stretched too tight, the tension of the screen when leaving the blank is relatively large, the speed of leaving the blank is faster, the contact time between the screen and the blank is reduced, and the penetrating glaze is screen printed onto the surface of the blank. Relatively small amount, in order to get a clear pattern at this time, must slow down the speed of the scraper. If the screen is stretched too loosely, the tension of the screen when leaving the blank is relatively small, the speed of leaving the blank is slow, the contact time between the screen and the blank is prolonged, and the enamel is printed through the screen to the surface of the blank The relative amount is relatively large, which tends to cause horizontal diffusion of the product pattern.
Conclusion
Although the High Precision Ceramic Network Resistor Substrate Plate application of screen printing on ceramic seepage tiles is a relatively new topic, the development speed in recent years is quite fast. In actual production, we must correctly control the spacing between the screen and the brick, and pay attention to the effect of the change in the performance of the enamel and the performance of the brick on the printing quality. In the process of operation must be targeted to make adjustments; according to the requirements of specific products and the performance of the glaze selection screen mesh number, reasonable adjustment of the tightness of the screen, only in this way to get high-quality printing patterns. (Author: Ye Chang Wang Xia Qing)
