Printing and indentation complete the process once

In some parts printing and decorating and printing processes, it is often necessary to add an indentation process, such as sticky notes, memos, book covers, invitation products, and some decorating and printing products (with creases), according to the traditional printing process. Complete the “printing” process, that is, print the graphic first and then perform the indentation process. This printing of its production efficiency and product overprint quality, are not satisfactory.

Through production practice and exploration, the author carried out technological innovations and improvements on the prints containing the indentation process, so that the products originally required to be completed by two processes can realize the production process of light and dark one-time printing, thus greatly improving the printing process. Ergonomics and product quality. The printing process is described as follows:

First, the improvement of the lining process

In order to quickly and easily achieve a one-off printing process, it is necessary to perform the necessary improvement on the conventional embossing lining process, that is, to reduce the inner lining to 0.7 mm, to reduce the amount of dunnage inside the lining layer, and to make a corresponding amount outside the lining layer. The increase. After the thickness of the outer liner is increased by 0.7mm, the local increase or decrease can be performed very flexibly, which facilitates the rapid realization of the transition of the light and dark one-time printing process. Therefore, the increase or decrease in the adjustment of the outsourcing liner material is a requirement that complies with the characteristics of the intaglio printing process, which is an important measure for improving the printing efficiency and quality.

Second, the selection and correct adjustment of the ink roller

The dark and light one-time printing process is realized when the light and dark layouts are adjusted to be slightly different. When printing, the printing plate should be evenly inked, and the dark marks should not be inked. This requires that the ink roller should have a relatively good accuracy, so the ink roller should use an ink roller that does not deviate the core, does not bend and deform, and has high precision of the shaft and the shaft, so that uniform ink can be ensured. The position of the ink roller is adjusted so that the printing plate can be evenly inked, and can maintain proper contact with the line roller, so that the ink can be uniformly received. However, the contact pressure with the iron roller must not be biased so as to prevent the ink from being pressed and deformed so that the black mark surface is exposed to the ink.

Third, the layout of the height adjustment

For printed note products, as long as the letter layout more than 0.7mm pad height, so that it can form a difference with the dark mark layout, easy to make the Mingyin plate receiving ink, and dark printing plate due to lower than the printing plate can not touch the ink . As the bright printing plate surface is increased, the corresponding outer liner must be reduced accordingly. To do this, the outer lining should be made of a 70g kraft paper. However, on the back of this kraft paper, there should be a piece of white paper with a modest web size and a thickness of 0.7 mm, corresponding to the dark mark layout. Bright and dark layout pressure, ensure print quality. If it is a product that needs to be creased, such as a book cover, a book spine, etc., as long as the bottom of the indentation steel blade is grinded down to about 0.7 mm below the surface of the clear printing plate by a grinder, then the indentation knife is directly merged with the printed plate. Group printing, so that when the printing is due to the steel blade slightly lower than the Mingyin layout without ink. However, a hard padding material with a proper amount of padding is applied to the padding part, such as a white paper stick, so as to satisfy the indentation condition so as to realize a one-time printing process with light and dark.

In summary, the use of a one-off printing process with bright and dark not only greatly improves the printing efficiency, but also significantly improves the overprint quality of the product. At the same time, it also reduces the loss of raw materials and improves economic efficiency. For many years, in the production of the machine, the author adopted a one-off printing process for dark-marked products, so that products that originally required two processes to complete could be completed once. The effect of this process has also been well evaluated by peers and customers, and it is a technological improvement that has value in promotion and use.