A detailed introduction to the method of cleaning

2022-08-16
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Detailed introduction to the decontamination method of the screen printing machine version

release date: Source: Huicong editor: lychee browsing times: 3023 copyright and disclaimer

core tip: when using the screen printing machine for screen printing production, it is always unavoidable to decontaminate the silk of the screen printing plate, but we often use the screen printing machine to screen different kinds of products, resulting in the frequent unclean cleaning of the dirt on the plate, resulting in waste, It affects the printing quality and shortens the service life of the template. Here is a detailed introduction to the way to get dirt out of silk printing plates

[China Packaging News] when using a silk screen printing machine for silk screen production, it is always unavoidable to decontaminate the silk of the silk screen printing plate, but we often use the silk screen printing machine to screen different kinds of products, resulting in the frequent unclean cleaning of the dirt on the plate, resulting in waste, affecting the printing quality and shortening the service life of the template. Here is a detailed introduction to the way to get dirt out of silk printing plates

when there is dirt or dry ink on the printing part of the picture text, the silk should be decontaminated, and the frame should be lifted after stopping the printing machine. At this time, some operators will wipe the underside of the template vigorously with an abrasive cloth dipped in solvent. The sound is so loud that the whole printing workshop can hear it, and the template is often damaged

a really knowledgeable operator rarely rubs the template graphic printing surface with force, because he adjusts the machine body in time and knows that the clarity of the printed image and text requires that all graphic edges maintain a clear emulsion layer graphic interface. Forced friction will damage the graphic interface of the emulsion layer, and even wipe off the emulsion layer, leaving only bare eyes

when printing color images with high line count, the emulsifier film under the silk line is only um thick, and the diameter of the silk line of the eye itself may be only 30um, which cannot withstand forced friction. Therefore, the key to avoid rough decontamination is to first prevent the template from being polluted

the main cause of template pollution is improper ink control, resulting in dry ink left in the eye. When using solvent ink or water-based ink, the reason is that the ink is too thin or too thick. The state of inking should not change. When using UV curing ink, efforts should be made to prevent the silk from being exposed to UV light and sunlight

another ink control problem and improper control of printing speed will lead to uneven supply, making the hole with insufficient ink dry and firm quickly

the last reason why the ink dries is that the doctor blade is improperly set or has been worn. When printing images with fine layers with high-line numbers, it is required to use the doctor blade edge. The doctor blade will be deformed or worn in normal use, and the surrounding image sharpness will decline, which indicates that the ink may not pass through the hole normally. If this problem is not solved in time, the ink will dry and fix in the hole. In order to avoid the above problems, the doctor blade should be turned over regularly to prolong the service life of its doctor blade edge, or a new doctor blade should be used before the graphic printing quality has not decreased

in order to make the hole work normally, you should also pay attention to cleaning the dirt in the ink or on the substrate. Due to 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 solved by improving storage conditions and process control. In addition, the use of electrostatic precipitators and substrate decontamination devices can also prevent dust and dirt from being transferred from the surface of the substrate to the hole

what should be done if the template is polluted? When using the platform silk printer, stop the printer after printing a group of sheets, and then input a blotting paper to make the silk contact with the blotting paper

put the silk on the printing position, and then wipe off the dirt on the ink scraping surface of the template with a non abrasive soft cloth dipped in silk detergent. Do not use too much force, so that the dirt will fall through the hole onto the absorbent paper below. If necessary, repeat cleaning the hole with a piece of absorbent paper. Some dirt particles falling on the top may be too large to punch through the hole, but they can be stuck up with a soft cloth. After cleaning, the template can be dried with a hair dryer (using cold air)

different situations will be encountered when cleaning the round press silk printing machine. In terms of design structure, you are welcome to pay attention to BASF's official order number "BASF in action" [No.: basf_in_action], so you can't wash the dirt on the absorbent paper like cleaning the ordinary silk printing machine. Fortunately, due to the relatively fast printing speed, it is unlikely that the ink will dry in the hole. If this happens, first stop the printing machine after printing the assembled parts, and then dip the silk cleaner or thinner with a non abrasive soft cloth on the top of the template at the printing image and text part, and pay attention not to brush the dirt in the hole with solvent. To meet their own needs and even the needs of the world

sometimes we have to remove the dirt under the template. In this case, you should use a soft cloth to gently wipe away the dirt, do not use too much force. In the production process, the above cleaning and decontamination methods should be often used to extend the service life of the template and screen printing machine and reduce the scrap rate

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