Anyone who uses inkjet flatbed printers knows that the most fragile part of the machine is the print head. So, in the long-term use, how to maintain the print head to extend the life of the inkjet flatbed printer nozzle, Micolorprint will introduce you to some common sense of maintenance.
First, the ink quality is not good enough, causing the nozzle to block up.
When using flatbed printers, some customers feel that the cost of ink provided by the company is too high. If they change some inks that are not of good quality, they often cause serious print head clogging. This is the most serious ink quality problem. Excessive ink clogging is a direct result. The nozzle is clogged. The plugging factor is a parameter directly related to the particle size of the pigment in the ink. If the plugging factor is larger, the particles are also larger. Using ink with a larger clogging factor may not find any problems in the short term, but as the usage increases, the filter will gradually become clogged, causing damage to the ink pump, and even some large particles will pass through the filter, causing Permanent blockage of the ink head causes serious damage to the ink head.
Second, the rapid change in temperature and humidity affects the nozzle and ink
When the inkjet flatbed printer leaves the factory, each flatbed printer manufacturer will have a specific temperature and humidity limit for the use environment of the equipment. Why is there such a limit? Because the stability of the ink determines the use of the universal flatbed printer nozzle, and The stability of the ink is determined by the viscosity, surface tension, volatility, fluidity, and other factors of the ink. What directly affects these indicators is not entirely determined by the production process. The temperature and humidity of the storage and use environment are also determined by the ink. Played a decisive role in normal use. If the temperature is too high or too low, the viscosity of the ink will decrease or increase a lot, thereby breaking the original state of the ink. As a result, frequent disconnections and even stray pictures appear during the spray painting process. On the other hand, if the environmental humidity is too low and the temperature is relatively high, the volatility of the ink will increase, and the ink will easily dry and form a solidified substance on the surface of the nozzle, which will affect the normal operation of the nozzle. If the humidity is too high, ink may accumulate around the nozzle hole, which will also affect the print head, and the picture will not dry easily. So pay attention to changes in temperature and humidity at all times. The nozzle’s requirements for humidity are relatively subtle. The ink volume in the nozzle’s ink cavity is very small. The ink is siphoned to complete the ink supply process. Therefore, the sharp change in the external temperature can easily break its original equilibrium state, because the nozzle is working At this time, a certain amount of heat is generated, and the ink maintains balance and stability at this temperature. At this time, if the climate changes suddenly, such as a sudden cooling or heating, and there is no temperature adjustment device in the room at this time, then the impact of the nozzle will appear. , The ink will suddenly be out of use, the print head will not work normally, and the same ink will not be used in the same batch. The solution is to control the temperature so that the temperature of the production workshop does not change more than 3-5 degrees in a day.
Third, the influence of work habits on the sprinkler
Note that there should be no burrs on the suction nozzle of the vacuum cleaner, so as not to scratch the nozzle during the suction process. The most fear of the nozzle is drying, as long as you find a way not to let the nozzle dry. Using good methods to protect the nozzles will not block them. The poor use of ink is mainly manifested in poor ink and sticky head (shown as a V-shape on the screen). The color is not bright and gray, fades fast, etc.
Fourth, the ink viscosity is too high
Too high ink viscosity will cause the ink to stick in the ink delivery tube, resulting in insufficient ink supply, insufficient ink ejection, and color breakage. Especially in winter, when the temperature is low, this phenomenon is more prominent.
Increase the indoor temperature (such as turning on the air conditioner, using a dryer, electric heater, etc.) to reduce the viscosity of the ink. Or use ink with lower viscosity.
Fifth, the effect of the nozzle voltage on the nozzle
The voltage of the print head, because the voltage of the print head can determine the curvature of the piezoelectric ceramic inside the print head, so high voltage can also increase the inkjet volume. The lower the better without affecting the picture quality. The practice has proved that the voltage exceeding 32V Voltage may encounter frequent ink breakage of the print head and reduced service life. As mentioned earlier, the high voltage will increase the bending of the piezoelectric ceramic. If it is in a high-frequency oscillation state, the piezoelectric crystal inside the print head will be It is very easy to fatigue and damage, and break, and the low working voltage of the nozzle will affect the saturation of the picture. So the working voltage of the nozzle between 28V-32V is more suitable.
Different brands of universal printers have different nozzle voltages. For example, the nozzle voltage of the Gongzheng Machine is 37V, the nozzle voltage of the Cyber Machine is 35V, and the nozzle voltage of Yaselan is 33V. Different voltages require different ink viscosity. It is not the same. High printhead voltage requires high ink viscosity, and low printhead voltage requires low ink viscosity. The two are in a proportional relationship.
A. If the nozzle voltage is high and the ink viscosity is low, it will cause too much inkjet and too fast speed. The ink dots reflect the bottom of the nozzle to form ink droplets and block the nozzle, and there will be burrs and floating ink.
B. If the nozzle voltage is low and the ink viscosity is high, the ink cannot be ejected, the color block is uneven, and the color is not full.
Solution: replace the compatible ink or lower the voltage
Sixth, the impact of static electricity on equipment and ink
During the printing process, a large amount of static electricity is generated due to the friction between the printing substrate and the feed roller. If it cannot be eliminated in time, it will easily affect the normal operation of the print head. If the ink droplet is affected by static electricity and deviates from its trajectory, it will appear on the screen. And the phenomenon of flying ink. If the static electricity is too large, the print head may be damaged, and the computer equipment is prone to garble and crash under the influence of high static electricity, and even the phenomenon of burning the circuit board of the machine, so take correct and effective measures to eliminate the equipment. Static electricity is extremely important. The buried ground wire is a good way to eliminate static electricity.
Seventh, the ink viscosity is too low
If the ink viscosity is too low and the ink is too diluted, the inkjet speed will be fast, and the ink will be reflected back to the nozzle when it is sprayed on the printed matter, causing the ink to accumulate on the nozzle and cause the nozzle to block. This phenomenon is more prominent when spraying the same color for a long time.
Solution: scrub the nozzle with a professional cotton swab viscous cleaning fluid. To completely solve this problem
You need to replace the high-viscosity ink.