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Factors affecting the printing speed of gravure printing machines

Update time : 2020-12-16

Source : Zhejiang Deguang Machinery Co.,Ltd

Views : 202

Factors affecting the printing speed of gravure printing machines
The speed of gravure printing machines is related to its structural composition. When the soft package factory purchases the gravure printing machine, it can investigate the two factors of the transmission distance between the colors of the printing machine and the effect of the drying box. Let's give you a detailed introduction to these two key factors that affect the printing speed of gravure printing machines.
speed of gravure printing machines
1. The length of the transfer distance between the colors of the printing machine affects the printing speed of the gravure printing machine

Because of the chromatism on the printed product during printing, if the ink of the previous color is not dried, the ink of the subsequent color will dissolve the ink of the previous color, causing color eating. Therefore, the longer the transfer distance between the various colors of the gravure printing machine and the longer the natural drying time, the more the printing speed can go up, otherwise it is difficult to increase the printing speed.

2. The effect of the drying box will also affect the printing speed of the gravure printing machine

The effect of the drying box is good, and the ink can be completely dried. Not only the front color ink cannot be dissolved, but the solvent residue will also be reduced. The gravure printing ink is dried by hot air, not by heat.

First, the gravure ink will prematurely condense when heated, and the coverage of the color film will affect the volatilization of the solvent in the ink, which will cause the phenomenon of false drying of the ink. Secondly, the ink contains a variety of solvents with different boiling points, so the volatilization speed of various solvents is different, that is, the low boiling point solvent volatilizes fast, and the high boiling point solvent volatilizes slowly. When the temperature is higher, the solvent with low boiling point will volatilize faster, and the solvent with high boiling point will remain more.

In view of the above two reasons, the greater the heating capacity of the printing press drying box, the harder the printing ink is to dry. If the printing ink does not dry or dry, it can cause the printing to dissolve or stick. The printing speed will not open fast, the printing speed will be slow, and the amount of ink will be large, which will easily cause the printing to dissolve or stick. By analogy, the printing speed is difficult to increase.

Therefore, the ratio of heating volume and blowing volume of the printing press drying box should be correct, which is the prerequisite for ink drying. Secondly, if the printing press oven runs wind on the printing plate, the printing ink will dry on the printing plate roller, the light screen of the printing pattern will not be printed, and the transition color will not be printed completely. Thirdly, the heat of the drying oven must be directly baked on the film, and the film will stretch accordingly. If the wind blows directly on the film, the film will shake. The film stretches and shakes, which will affect the accuracy of the printing process.

When selecting and purchasing a printing machine, pay attention to the fact that a good drying box for a gravure printing machine must have: the heat cannot be directly baked on the film surface, the wind cannot be directly blown on the printed matter, and the wind cannot run like a printing plate. The heating capacity and exhaust air should be unobstructed, and the performance of secondary air return is better.

Zhejiang Deguang gravure printing machine adopts superb production technology. We have the largest printing press market share in China.

Tag: speed of gravure printing machines