What do you know about the Flexo printing machine?

The Flexo printing machine is a printing plate that protrudes on the rubber plate, photosensitive resin plate and other materials, and the required image is mirrored—just like a potato print for children playing. The amount of ink transferred to the printing plate (or printing plate cylinder) is controlled by the anilox roller. The printing surface is in contact with the printing material during the rotation process, thereby transferring the image and text.

What are the working principles of Flexo printing machine?

What should I pay attention to when using Flexo printing machine?

What are the possible reasons for Flexo printing machine blockage?

What are the working principles of Flexo printing machine?

Typical printing unit used by Flexo printing machine. In this system, the anilox transfer roller is supplied with ink by the ink fountain rubber roller, and the function of the ink fountain rubber roller is to transfer sufficient ink to the anilox transfer roller (anilox roller for short). The cooperation of the doctor blade and fish anilox roller makes the Flexo printing machine suitable for inks of various viscosities and obtain better printing quality under higher factors. When the printing speed increases, although the dynamic pressure on the surface of the anilox roller increases, the doctor blade presses on the surface of the anilox roller. Therefore, the ink delivery volume of the inking system has nothing to do with the dynamic pressure of the ink, and it is hardly affected by viscosity. The amount of ink delivered by the anilox roller mainly depends on its ink storage system (the volume of the ink pocket of the anilox roller) and the ink separation between the anilox roller and the surface of the printing plate, and has nothing to do with the running speed of the inking system. This short ink path inking system can maintain a constant amount of ink at various speeds, so the Flexo printing machine is capable of high-speed printing and high-definition color dot printing.

What should I pay attention to when using Flexo printing machine?

1. Since the printing speed and drying heating temperature of the Flexo printing machine are very high, a cooling roller or other cooling device must be installed to cool down the printing material (material roll) to prevent the material roll (especially PVC plastic film, thin paper, etc.) from being heated and dried. Undesirable phenomena such as shrinkage, warpage, fiery expansion, etc. during the drying process;

2. In order to reduce the volatile organic compounds (VOCS) emitted by the solvent-based ink during the heating and drying process, the Flexo printing machine should be equipped with VOCS post-processing equipment. There are two main post-treatment methods, catalytic oxidation method and cooling recovery method.

What are the possible reasons for Flexo printing machine blockage?

a. The anilox roller was not cleaned thoroughly when replacing the printed parts;

b. Long-term shutdown without cleaning the anilox roller;

c. The ink drying performance is too fast. "Workers must first sharpen their tools if they want to do well."

Therefore, in order to maintain the accurate transfer of the ink volume of the Flexo printing machine, the anilox roller must be cleaned reasonably.

For more information about Flexo printing machine, please contact ZHEJIANG GREENPRINT MACHINERY CO.,LTD has committed to providing the increasing of Flexo printing machine, and make them more effective, reliable, and consistent.