The clogging of the UV printer's printhead is a very common printing failure, so what are the reasons for the UV flatbed printer's clogging, and how to avoid it in advance? This article is announced one by one for everyone.

1.After the ink accumulates to a certain extent on the printhead of the photo machine, the printhead hole is blocked. This is the most common way of blocking, because the solvent in the ink must volatilize into the air to make the picture dry, so the ink is a volatile Liquid, easy to volatilize in the air and clear out solids. When the printhead is spraying on the fabric, there will always be a part of the ink around it. This part of the ink will gradually reduce the printhead or even block the printhead after drying in the air, but because it is on the outside of the printhead, it is easy Clean up, this is why we often clean the printhead.

2.The piezoelectric crystal is damaged: it is certain that the printhead can not eject ink. The general piezoelectric printhead can be used for about a year. It is normal that it may be used for less than a year in a factory with a lot of inkjet work.

3. Piezoelectric crystal fatigue damage: the phenomenon is that the print head of the photo machine sometimes ejects ink, sometimes it can not eject ink, especially when the inkjet volume is large (that is, when the dark screen is sprayed), the phenomenon of "clogging" is obvious, the best method at this time Is to replace a new printhead.

4.The filter in the print head is blocked and the print head does not emit ink: use a longer print head, especially in a factory where the print job is not full and often shut down at night, the ink does not flow in the print head for a long time, and it is easy to adsorb to the internal filter. On the wall of the net or ink channel, the cross-sectional area of the ink flow is reduced, which will also cause the phenomenon of no ink from the printhead. Now special equipment can help you solve this problem of the printhead.

5.The viscosity of the ink is too high or too low: the viscosity of the ink is too high and the fluidity of the ink is poor, and the amount of ink ejected by the printhead per unit time is not enough; the viscosity of the ink is too low, that is, too thin, and it is easy to press in the printhead hole When the transistor is retracted, air is sucked in, and ink cannot be sucked, so air is ejected; both of them will cause the phenomenon of no ink from the printhead. In this regard, customers are often required to store the ink environment is very important. The ink should be placed in the environment where the ink is used for more than 24 hours before use, because the viscosity of the ink will be very high at low temperature, and the viscosity will be at high temperature. Becomes very low, this kind of viscosity difference is very big, once the ink with big viscosity difference is mixed together, it will cause the phenomenon that the ink can not be ejected.

6.Failure of the drive circuit: The aging of the electronic components of the drive circuit and the accumulation of too much dry ink dirt may affect the voltage of the drive printhead, resulting in no ink or unstable ink output from the printhead.

7. Types of ink: Due to improper control of the amount of desiccant, the ink of some manufacturers dries too quickly, which may cause the ink to be clogged outside. Although it can be cleaned, the cleaning interval is relatively frequent. Once the printhead is not used for a long time, it is not timely. When protecting the print head, it may cause permanent damage to the print head the next time you paint.

8.Frequent ink replacement: In many cases, the printheads may not be protected well when replacing the ink, which will also affect the inkjet status of the printheads.

9.The temperature and humidity of the environment where the machine is used: It is generally recommended that the temperature is 22-25 degrees, and the humidity is 40-70%. High and low temperatures affect the viscosity of the ink, which will cause the ink shortage of the printhead, which is often mistaken for "printhead clogging" ".

10. printhead driving voltage: A suitable printhead voltage will make the printhead ink more smoothly.

The above are the common reasons for the clogging of the print head of the photo machine. I hope it can help everyone.

Zhengzhou New Century Digital Technology Co., Ltd (Skycolor UV Printer:www.skycoloruv.com) is a professional high-tech enterprise engaged in R&D, production and sale of skycolor uv flatbed printer,skycolor uv roll to roll printer and related consumables.

Over the years,company has accumulated rich experience in digital uv printing field and gathered a batch of employees with professional skills. With high product quality and standardized service system,company has won high reputation from global market and trust of cooperated units.