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Use of glass screen printing machine and troubleshooting
2. Patterns or lines are flowery
Glass screen printing machine has too many screens, caused by the slack of the screen template; the distance between the loose positioning screen and the substrate changes; the angle between the squeegee and the substrate is incorrect, or the force is uneven; the thickness of the printing material is too thin or Too dry; after cleaning the printing surface of the reworked workpiece, the solvent will not be able to dry out and screen printing.
3, line distortion
The printing material is mixed too thinly, and the scraping is too strong; the printing material is unevenly adjusted (the solvent in the printing material is unevenly dispersed); the solvent or cleaning agent on the screen mold is not dry after the screen is wiped, or the workpiece is reworked When the surface cleaning agent is not dry or clean; after the first squeegee, the sealing force of the printing material is too large, causing a small amount of printing material to squeeze out the mesh; the speed of the squeegee movement (moving) during printing is within the effective area of u200bu200bthe substrate The difference is too large, stopping in the middle or repeating printing, etc.; the fineness of the printed material does not match the number of screen meshes selected.
4. The pitted printing material is too sticky, has impurities, and is blocked; or the printing material is too sticky, and the scraping force is insufficient;
The surface of the substrate is not clean and oily; the printing material is too sticky, the dirt on the screen mold has not been removed, the printing material has large particles, and the high-mesh screen cannot pass; the screen printing drying speed is too fast, and the screen printing workplace is exhausted ; Quick-drying printing material failed to seal the net in time, resulting in netting; uneven force during scraping, large or small; uneven surface of the substrate, etc.
5. Pattern line edge burrs, gaps, cams, etc.
The maturity period is not enough when the printing material is mixed, the residual bubbles in the printing material are not clean, and the bubbles stick to the substrate after screen printing; the surface of the substrate is not clean, dust and other influences, improper force during printing, light and uneven Or the printing force is insufficient; the printing material on the substrate is not dry, which is caused by dust in the storage place; the distance between the screen and the substrate is too large under the proper conditions of the printing material; the screen is not cleaned thoroughly before printing.
When we encounter these problems, we should carefully analyze the reasons that affect the quality of the glass screen printing machine's product quality according to the above points, and solve the causes. As for the quality problems that occur in non-scratch printing operations, such as stretched screens Problems, optimal distance problems, screen printing stencil production problems, workpiece surface treatment problems, and printing material selection, etc. will affect the quality of screen printing. These are the places we should pay attention to.
The article is provided by: Glass Screen Printing Machine, Senxi Machinery Co., Ltd. The views in this article do not represent the views of this site