In the pad printing technology, the accurate reproduction of color plays an important role in the printing quality. In color matching, the color matching problem related to the color measuring device is an objective scientific topic, which can be expressed by data; and the device-independent color matching topic is a subjective subject, which is limited by artistic conservation and observation level. In order to meet the needs of customers, it is necessary to consider the influence of objective data when printing, and to consider the desired artistic effect. This article will introduce you to the automatic pad printing machine.
Over the years, the printing function of the pad printing machine has been continuously improved. In addition to the printing of the concave-convex surface of general products, the application range in various industries has been continuously expanded and extended, which requires design or according to different needs. Improve the pad printing machine and expand the use of the pad printing machine.
The working principle of the pad printing machine: When the moving housing is moved to the left, the inking device fills the etched pattern with ink. When the moving housing is moved to the right, the squeegee scrapes off excess ink other than the pattern on the steel sheet, leaving only the ink on the pattern. The printing carriage is dropped, and the silicone head is pressed against the etched pattern to draw the pattern. The pad printing machine converts what we need to print into a gravure, and then transfers it to the substrate through a special silicone head. The surface of the substrate is generally irregular irregular surface. For example, the surface printing of many electronic products such as mobile phones and computer keyboards, surface printing of various shapes and shapes of cups, plates, home porcelain articles, wood products, metal necklaces, lighters, etc. can be completed by a pad printing machine.
The moving housing moves to the printing position to the left, and the printing plate is filled with ink again at the same time, the printing bracket falls again, the printing head of the silicone is pressed on the surface of the product, and the printing head is deformed to conform to the surface of the product, and the printing head is placed on the silicone printing head. The ink is transferred to the product, and when the pad printing machine is finished working, the printing stand rises.
As mentioned earlier, while observing the color of the print, the color of the substrate itself is also seen. In order to reduce the influence of the substrate, the ink selected should be as opaque as possible. At the time of pad printing, the thickness of the printing ink layer after drying is about 20% of the etching depth of the printing plate. If the etch depth is 0.001 inches, the thickness of the film after drying is between 0.0002 inches and 0.00025 inches, which is much thinner than silk screen printing, so too thin a film layer is sufficient to mask the influence of the color of the printing material. One of the solutions is the etch depth, but when the depth exceeds 0.0015 inches, the effective transferability of the ink is greatly reduced, the image becomes awkward, and the paste starts to be smeared. Therefore, only another method can be adopted to improve the number of times of printing. This process is called double printing or multiple printing.
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