In order to achieve this breakthrough in label printing technology, we need to solve the market's demand for high accuracy of new label printing process without reinvesting the main printing equipment, mainly through two ways of label printing.
With the increasing demand for product labels, the label printing industry is becoming more and more mature. The label industry is facing unprecedented opportunities for development. At the same time, the traditional label printing industry is also developing to a higher level. The order delivery cycle is becoming shorter and shorter. At the same time, the label printing process is required. But higher and higher. The improvement of label printing technology is mainly reflected in the requirements of various combinatorial printing methods. The era of single relief printing as the main form of printing has gone forever. In addition to the relief effect, the effect of flexographic effect, offset printing effect, bronzing effect, screen printing, gravure printing effect, and even the effect of indentation and convexity, cold pressing process, partial UV oil, etc. are needed for the production of high-grade red wine labels.
For the improvement of printing accuracy, it is mainly embodied in the realization of various printing process combinations, but also has a very high overprint accuracy. However, due to the limitations of existing equipment, this requirement can not be achieved. We can not avoid the fact that the current domestic label printing is still based on relief printing, or single flexographic printing, resin printing as the main current situation, we need to add a variety of label printing methods.
In order to achieve this breakthrough in label printing technology, we need to solve the market's demand for high accuracy of new label printing process without increasing the reinvestment of major printing equipment. We mainly solve the problem through two ways of label printing:
1. Adding supplementary functions to existing equipment, such as adding pull rods and paper passing, can not affect the printing accuracy.
2. Off-line realization of all new printing process supplement.
At present, the main label printing methods in China are relief printing, resin printing or single flexographic printing. Generally speaking, for precision label printing, these two methods are basically able to meet the needs of special printing effects, such as: stereo effect, strong metal effect, soft relief effect, local UV printing, etc., but can not be satisfied. This requires that additional processes be considered when the equipment can be extended or there are enough workstations.
In all the installation processes, gravure printing is difficult to install, because the printing pressure and tension required for gravure are very large. In this way, in the overall control, if not properly controlled, it is very easy to have an impact on the original printing methods and tension, thus affecting the overprint, affecting the final print. The gravure printing unit shown in this paper provides control instructions for secondary overprinting through an independent full servo system, and realizes accurate overprinting by compensating the floating roll in the system. No matter how to adjust the material or the original printing equipment, speed-up and speed-down control, whether the original equipment is spindle drive or servo drive, this gravure system can achieve synchronization with the original system without speed difference, without changing the original tension, so it can track the original overprint completely, thus realizing the process. Supplement and upgrading.