Machine maintenance

Tips for Extending the Life of UV Printer Nozzle| HYUNVAN


Hyunvan UV printer UV Printing machine factory, making UV flatbed printer, roll to roll UV printer,UV hybrid UV printer mostly use the Ricoh Gen5 and Ricoh Gen6 for Industrial purpose,with the experience ,pls followas below,

First: Ink quality is not good enough, causing nozzle blockage

Some customers feel that the cost of ink provided by the company is too high when using flatbed printers. If they change some inks that are not of good quality, they often cause serious blockage of the nozzles. This is the most serious ink quality problem. Excessive ink clogging factors directly lead to 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 and cause Permanent blockage of the ink head causes serious damage to the ink head.

Second: The impact of rapid changes in temperature and humidity on the print head 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, there are frequent disconnections and even faint pictures in the process of spray painting. 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 product 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, and 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 bad work habits on the sprinkler

Note that there should be no burrs on the nozzle of the vacuum cleaner to avoid scratching the nozzle during the suction process. The most fear of the nozzle is drying, as long as you find a way to not let the nozzle dry. 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, and the color fades quickly, etc.

Fourth: 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 failure. Especially in winter, when the temperature is low, this phenomenon is more prominent.

Solution: 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 influence of the nozzle's 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. 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, 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 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 Gongzheng Machine is 37V, the nozzle voltage of 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 ink jet and too fast speed. The ink dots reflect to the bottom of the nozzle to form ink droplets that 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. For example, the ink droplets are enough to be affected by static electricity and deviate from its trajectory, causing a phenomenon of vanishing 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 very prone to garbled and crashed 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. The static electricity is extremely important. Buried ground wire is a good way to eliminate static electricity.

Seventh: Ink viscosity is too low-the ink viscosity is too low, the ink is too diluted, the ink jet speed is fast, and the ink will be reflected back to the nozzle when sprayed on the lamp cloth, 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: Use professional cotton swab viscous cleaning fluid to scrub the nozzle. If you want to completely solve this problem, you need to replace the high-viscosity ink.


1.What about the After-sales service ?

1. Provide customers with a systematic site layout proposal to ensure a smooth installation.
2. Provide free on-site training at the factory and second review training at the installation site;
3. The standard warranty period on average is one year. However, HYUNVAN would like to offer extra warranty period (consitions apply), lifetime maintenance.  
4. We HYUNVAN can send engineers to help customers install the machines, train workers, but buyer should offer ticket charge, boarding and lodging .

2.What are the requirements of installation environment?
Power supply: 220V, 50Hz, reliable grounding, set the protection device of over-current and over-voltage, preferably with stable 5KVA power; Environment: with temperature 20~25℃, humidity 50%~80%, dustless, no directly sunlight, flat and stable floor surface.

3. How long does the print-head working life? Do you provide the maintenance service?

A print-head can be used 2-3 years in regular working conditions. The print-head is not included in maintenance service generally.


1.Color Accuracy- The international high-end color management system is adopted to ensure the color accuracy of each picture, and the independent ICC can be customized for you individually.
2.After-sales service is perfect and fast,  The standard warranty period on average is one year. However, HYUNVAN would like to offer extra warranty period (conditions apply)
3.Accept non-standard customization ,  accept super large, super high, super heavy, cylindrical, special-shaped, super high-speed machine customization

4.Focus on high-precision equipment,  using industrial Ricoh G5 G6 nozzles, Epson, Toshiba, Konica nozzles


Suzhou Hyunvan Intellitech Co.,Ltd. Established in 2011, is a professional manufacturer specializing in the research, development, production and sales of UV printing equipment. The company has a number of patents. At present, the company’s main products are : UV flatbed printer, UV roll to roll printer, UV hybrid printer. Products are widely used in the background wall decorative painting industry, advertising sign industry, furniture digital printing industry, glass crystal technology industry, packaging processing industry and so on. Suzhou Hyunvan Intellitech Co.,Ltd. focus on customers’ needs, with good stability ,high precision and fast speed. Products are ranging from economical and practical to high-end industrial, from standard format to large format customization, we provide comprehensive, product types for customers in different industries. The company has adhered to the road of independent innovation for many years. The company has a complete R&D and production equipment system, attaches great importance to product quality and new product development, and cultivates a well-trained R&D, production and after-sales team to continuously enhance the innovation strength of the company. Continuously improve product quality and Continuously improve service quality. Based on the tenet of “ Honesty is the foundation and win by quality”, the company focuses on the market demand, looking forward to the future ,takes the pragmatic innovation and serves the customers’ business

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