Computer Digitized Production Management System in Flexographic Production

As we all know, the expansion rate of flexo printing dots is far more than that of offset printing dots. The expansion rate of offset printing sites is consistent, and its specific expansion value is based on the difference in the number of line points of outlets, the difference in the percentage of outlets, and the shape of outlets, resulting in different expansion values ​​in the perimeter of outlets.

However, the long-term measured flexographic product network expansion rate is not the same as that of offset printing: the smaller the flexographic product network dot, the higher the expansion rate (not the expansion value) in printing! This and the flexo product to pull open the contrast between color and tone, the trend is running in reverse! What is the reason? How to calculate the compensation in computer numerical control? These issues have long puzzled us.

In general, there are many kinds of flexo printing machines such as narrow-width machine, wide-width machine, and slot machine. The carriers include self-adhesive, coated paper, cardboard, corrugated paper, plastic film, and various metal foils (such as aluminum tubes for beverages). Coverage is much larger than offset printing. The number of dot lines used in its graphics range from 30 lines (some are even thicker) to 175 lines. Due to the variety of circumference changes caused by the number of line dots, and the difference between the printer and the carrier, different types of curve data must be compiled so that the flexographic version can meet the pressure of a specific flexo press. Anilox roller printability.

Due to the extremely high expansion rate of flexo printing outlets, it is common sense to use the output of a circular dot plate with the most connotation and the shortest perimeter to slow down the dot gain rate during printing. However, behind this common sense, the high expansion rate of the flexo network itself and the change in the shape of its outlets will bring three problems:

1. After the use of a circular network, the resolution of the subsequent levels will decline;

2. The high expansion rate of flexographic printing dots itself includes the change and decline of the sharpness of the edge layer during the printing process;

3. After using a circular network, the calculation of the percentage of the circumference of the edge of the network is a completely different data pattern from that of traditional offset printing.

In the flexo slot machine printing corrugated box, in addition to four-color machine or more color group machine, there are also three-color machine printing color graphics. At the same time, the color shift and ash content of three primary colors using different brands of water-based inks are also different. According to the actual situation provided by the customer, after the color separation is entered into the computer, the blacktone version of the skeleton version is resolved into the three primary versions of C, M, and Y to provide necessary correction and compensation for the data.

The “image-to-number” conversion and computerized digital production management system in the flexographic production ensured the stable quality of various products.

Under the conditions of the non-black version of the three-color flexo printing, the printed product still seems to have a black color level and gray balance effect of four-color printing, and no color cast occurs. In addition, according to the different color deviations and gray ratios of the three-primary water-based inks used in the flexo printing plants, calculations are compensated in the computer so that the printed products can obtain the best color the customer needs under the conditions of the specific three-primary water-based inks. effect. Flexographic and offset printing, although each with different characteristics "interlaced as if separated by mountains", but after the conversion of the image-like, they can find the commonalities in mathematics, so it is "interlaced and unreasonable."

Therefore, it can be said that in the contemporary flexo platemaking technology, if you leave the computer's data calculation and control, it is an unthinkable thing! Therefore, modern flexo platemaking belongs to the high-tech field. In the contemporary world printing industry, the development of flexo printing is the most promising one.

Due to the low toxicity of water-based inks, the wide coverage of the carrier, the high flex print resistance and the relatively low cost of the flexo press compared to offset presses, the future is full of hope for development.

The outstanding performance is now setting off a wave of "concave and soft, rubber to soft". However, the key to breaking through the quality of flexographic printing, approaching and achieving offset quality is not only the high-quality “technical talents,” but also the scientific knowledge of equipment, materials, etc., and become “science and technology talents”.

It is advisable to continuously develop and innovate technologies in accordance with the needs of the market, and to compile and develop new software technologies through this innovative result, melt into quality control and become a digital production management system. This is the key to the internalization of "science and technology industrialization." Therefore, whether or not we can create “innovative management talents for science and technology” is a decisive factor for the improvement and development of China’s flexographic business.