As the label printing market matures, the label industry is ushering in unprecedented development opportunities. At the same time, the traditional label industry is also developing to a higher level. While the orders are getting shorter and shorter, the process requirements are getting higher and higher.
The improvement of printing process requirements is mainly reflected in the combination of multiple printing methods. Gone are the days when single letterpress printing was the dominant thing. In addition to the letterpress effect, the effects to be displayed on the label also require a flexographic effect, an offset printing effect, a bronzing effect, and a silk screen effect, and a high-end red wine label even needs a pressure bump effect.
For the improvement of printing precision requirements, it is mainly reflected in the realization of the multi-process combination method, but also a very high overprint accuracy. But often due to the limitations of the existing equipment, this requirement cannot be achieved. We cannot avoid the reality that the current domestic label printing is still based on letterpress or single flexographic printing.
To achieve this breakthrough, without increasing the new investment in the main equipment, to solve the market's high precision requirements for the new process, there are only two ways to solve it:
1. Add supplementary function to the existing equipment, and can not affect the printing accuracy 2. Offline implementation of all new process supplement
At present, domestic label printing mainly based on letterpress or single flexo printing. Generally speaking, for fine printing, these two methods are basically satisfied, but the special effects required, such as: three-dimensional effect, strong metallic effect, soft relief effect, etc., can not be satisfied. This requires the installation of supplementary processes when the equipment can be extended or there are enough stations.
In all the installation process, the installation of the gravure printing method is the most difficult, because the printing pressure and tension required for the gravure are very large. In this way, in the overall control, if not properly controlled, it is very easy to affect the original printing method and tension, which will affect the overprint and affect the final printed product.
The intaglio printing unit shown, through an independent full servo system, provides control instructions for secondary overprinting, and performs compensation through floating rollers in the system to achieve accurate overprinting. No matter how the material or the original printing equipment is adjusted, the speed-up and speed-down control, regardless of whether the original equipment is spindle-driven or servo-driven, this gravure system can achieve the speedless synchronization state with the original system without changing the original There is some tension, so it can completely track the original overprint, so as to achieve process supplement and upgrade.
The system has been successfully installed on different types of equipment, and the accuracy of overprinting can be less than +/- 0.15 mm. It is worth mentioning that two large sets of this gravure printing unit were successfully installed on the large wheel relief of Guangzhou Maggie Label Printing Co., Ltd. unit.
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