Three main reasons and solutions for printing bloc

2022-07-27
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Three reasons and solutions for printing blocking

release date: Source: Internet editor: lychee browsing times: 483 copyright and disclaimer

core tip: in the process of printing production, blocking often occurs in printing, which not only reduces the printing quality, but also greatly affects the printing efficiency. Once the plate is blocked, it will increase a lot of downtime, resulting in low production efficiency and loss of film production. How to solve the problem of plate blocking

[China Packaging News] in the process of printing production, blocking often occurs in printing. Once blocking, it not only reduces the printing quality, but also greatly affects the printing efficiency. Once the plate is blocked, it will increase a lot of downtime, resulting in low production efficiency and loss of film production. How to solve the problem of plate blocking

in the process of printing production, blocking often occurs in printing. Once blocking, it will not only reduce the printing quality, but also greatly affect the printing efficiency. Once the plate is blocked, it will increase a lot of downtime, resulting in low production efficiency and loss of film production. How to solve the problem of plate blocking

generally speaking, FMCG products have more and more delicate packaging bags, so what is the reason for the blocking problem? We usually find that the blocking is caused by ink, printing plate and operation

do not apply excessive voltage during the test

1 When printing with poor ink fluidity, some operators like to slow down the ink return into the ink cartridge so that more ink is stored between the corrugated roller and the rubber roller. This method is applicable to full page printing, because the ink fluidity is slow, resulting in an increase in the amount of ink on the printing plate, but the printing points or fine words will be blocked

solution: it is necessary to speed up the ink fluidity to prevent the printing plug. It can be solved by adjusting 12. A set of TestStar professional computer control software based on Windows operating system to complete the air pressure of the rotary friction of the ink supply pump

2. The ink dries too fast. When the ink is transferred from the roller to the printing plate, and the printing plate is transferred to the film, the ink dries on the printing plate because the ink dries too fast. In this way, the ink accumulates on the printing plate to form a blocking phenomenon

solution: this situation is easy to judge. When wiping the printing plate, the ink on the printing plate is difficult to wipe, which is generally caused by the rapid drying of the ink. It can be solved by adding new ink or slow drying agent

3. Too high ink viscosity can also cause blocking. The reason is the same as poor fluidity. Reducing the viscosity of the ink can be solved

thirdly, the dust and paper powder in the ink fall into the ink, and the dust is transferred to the printing plate through the ink system. You can install a filter in the ink inlet pipe, and the mesh is 120 mesh. To control the printing viscosity and improve the color concentration of printing, it is generally appropriate to control the viscosity at about 9 seconds

mismatch between the printing plate and the embossing roller

the printing plate is mainly due to the mismatch between the printing and the embossing roller. For example, the 300 mesh embossing roller needs to print 80 lines of patterns, so the matching will often block the plate. Because the 300 mesh hole is too large, the ink transfer will lead to too much ink on the printing plate, resulting in the blocking of the printing point, resulting in the mismatch between the printing plate and the embossing roller

solution: the conventional ratio is 1:4.5, which is reasonable

personnel operation error

in terms of personnel operation, the main reason is that the printing plate is deformed due to excessive pressure, resulting in the expansion of printing points and the blockage of points. The printing pressure gap is generally about 0.1-0.2 mm of the film thickness

emancipation method: the production operators shall be trained to prevent printing blocking caused by excessive printing pressure

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