How to Make Screen and Field Editions on the Plate Simultaneously

In general, in the case of a sufficient flexo printing machine, the same color screen and field version should be divided into two productions, because the screen printing needs thinner ink layer, while the field and line version need to be thicker. The ink layer. However, under certain special circumstances, it is necessary to print the same color network lines and field images on the same plate. Under this circumstance, on the one hand, when printing, the choice of anilox roller has to be compromised. Usually, it is a priority to meet the printing requirements of the cable screen version at the expense of the thickness of the ink layer in the field. On the other hand, when making the printing plate, Grasp the different exposure times to ensure the quality of the same plate version of the Internet and field parts. The difference between the image part and the field part of the cable is mainly due to the different depth of corrosion. The cable part needs to have a strong foundation in order to “stand” during the process of brushing the printing plate, so the corrosion depth should be shallower. Different depths of corrosion can be obtained with different back-exposure times by masking local methods. The front exposure time should also be similar, but it is said that the current flexographic plate manufacturer has introduced a new type of flexographic plate. No matter if the printing part is a cable or a field, this type of plate needs only one uniform front exposure. Time avoids the hassle of multiple exposures and makes flexo plate making easier.
Why rubber roller is easy to wear

The rubber roller is driven by the gears of the anilox roller. There are two functions. One is to mention ink from the ink tray in the ink transfer system; the other is to “pump” excess ink and leave it on the anilox roller. A layer of relatively uniform ink layer, but its role is far less than the role of the reverse squeegee. Regardless of whether the machine is printing or not, once the ink is filled in the ink tray, the rubber roller and the anilox roller start to rotate. However, once there is no ink or water between the two rollers, ie, in a completely dry condition, rotation of the two rollers under the condition of surface contact should absolutely be avoided. Because although the two rollers are in contact with each other, the linear velocity of the surface is different. The line speed of the surface of the rubber roller is slightly lower than that of the anilox roller. Lubricant between two rollers. In the absence of water or ink between the two rollers, if the two rollers come into contact with each other, the hardened skin of the rubber roller will be worn out in a very short time, and the damage will be exacerbated, and the entire rubber roller will be scrapped. Therefore, it should be remembered that rubber rollers and ceramic anilox rollers cannot be "dry-ground."
Use squeegee should pay attention to what

The use of a squeegee in the ink transfer system is optional, and for rougher on-site printing or UV glazing, there is no need to use a squeegee, just adjust the pressure between the rubber squeegee and the anilox roller. A substantially uniform ink layer can be obtained. For the printing of general printing products, a squeegee should be used. The pressure between the rubber roller and the anilox roller should be smaller to ensure that there is enough ink to evenly reach the squeegee blade. This is behind the squeegee blade. In order to get a uniform ink layer. In addition, the screws on the squeegee holder should be carefully adjusted. The screws can change the contact pressure between the squeegee blade and the surface of the anilox roller. If the above method does not work, that is still can not get a smooth and even ink layer, you can check the blade of the squeegee to see if it has physical damage or life, it may also be the screw of the fixed squeegee blade loose, resulting in the blade and net Roller axis is not parallel. Do not scrap the squeegee with minor defects. You can run the squeegee on other vacant printing units and run it until the defect is removed. A squeegee can continue to be used even if it rubs off a few millimeters of its width during its life.