How to deal with the pollution of the automatic screen printing machine? In the screen printing process, many printing workers often cause the printing template to be contaminated due to improper operation. Therefore, the key to avoiding decontamination is to prevent the template from being contaminated first. The following editors explain to you about the automatic screen printing machine:
In order for the mesh to function properly, care should be taken to clean up the dirt in the ink or on the substrate. Due to the electrostatic adsorption of pollutants in the air and poor storage conditions, the surface of the substrate will be stained with dirt. The above problems can be addressed by improving storage conditions and skill control. Other applications include electrostatic eliminators and substrate decontamination equipment. It can prevent dust pollution from being transferred from the surface of the substrate to the mesh.
What should I do if the template is contaminated? When using a full-automatic screen printer, stop the printer after printing a set of sheets, and then enter a piece of blotting paper to make the silkscreen match the blotting paper. contact.
Keep the screen in the printing orientation, and then wipe off the dirt on the ink scraping surface of the template with a non-conflicting soft cloth dipped with screen cleaner. Do not apply too much force, so the dirt will fall through the mesh to On the absorbent paper below, you can repeatedly clean the mesh with another piece of absorbent paper if necessary. Some of the dirt particles falling on it may be too large to pass through the mesh, but you can stick it with a soft cloth. After the cleaning is finished, the template can be dried with a hair dryer (adjusted to "cold wind").
The main cause of stencil contamination is improper ink control, which causes dry ink to remain in the mesh. When using solvent-based inks or water-based inks, the reason is that the ink is too thin or too thick. Additives should be added in accordance with the regular amount when adjusting the ink. At this moment, it is also necessary to add a small amount of pre-adjusted ink in printing production, and insist that the condition of the ink does not change. When using UV-curable inks, we should try our best to prevent the screen from being exposed to UV light, and also to avoid sunlight.
Another ink control question is related to improper regulation of printing speed. Improper speed control of automatic or manual operation of the printing machine will cause uneven supply and dry the meshes that are lacking in ink quickly.
The last reason that causes the ink to dry is that the squeegee is improperly adjusted or may have been worn. When printing slender images with high screen lines, it is necessary to use a squeegee with a sharp squeegee edge. The horizontal line angle is about 75 degrees. As the squeegee is deformed or worn during normal use, the sharpness of the surrounding image is reduced, which indicates that the ink may not pass through the mesh normally. If this question is not handled in time, the ink will dry. Fixed in the mesh. In order to avoid the above-mentioned problems, the automatic screen printing machine should turn the squeegee plate on time to extend the service life of the squeegee edge, and maybe use a new squeegee plate before the quality of the graphic print does not decrease.
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