Ink jet printing method

An inkjet printing and print-driven technology, applied in the field of inkjet printing, can solve problems such as inability to print images of qualified quality, and achieve the effects of improving printing efficiency, ensuring printing quality, and avoiding paper waste.

Active Publication Date: 2018-12-28
BEIJING MEIKEYI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then in this abnormal state, it is impossible to print an image of acceptable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example one

[0030] figure 1 It is a schematic diagram of the relationship between the ignition frequency of a nozzle and the ejection speed of ink droplets. Specifically, the ignition frequency of the nozzle is within the range of 0 to 50kHz (50kHz is the maximum ignition frequency of the nozzle). Most ink droplets (above 90%) The velocity injection curve of the nozzle. It can be seen from the figure that the ignition frequency reaches 6.5m / s from the A position, and then basically stabilizes, the speed changes insignificantly, until the O point, the corresponding nozzle ignition frequency at the O point is 22kHz. This ignition frequency interval is defined as the first interval. The ignition frequency of the first interval is greater than 0kHz and less than 22kHz; after O point, the waveform indicating the speed change begins to have a small amount of fluctuations, and the corresponding nozzle ignition frequency at point P is 29kHz, the ignition frequency interval from...

Example Embodiment

[0035] Example two

[0036] For the above figure 1 When using the nozzle with the characteristics of the nozzle shown in the figure, it is also possible to reduce the image printing resolution to avoid the problem of poor print quality in the third and fourth sections. Specifically, if the original resolution of the printed image is 600dpi, the image effect printed by the nozzle at the beginning of the acceleration phase meets the requirements. After the ignition frequency reaches 29kHz, that is, the P point, the print quality has problems, then the printer will print at 29kHz. Speed ​​V 29kHz =29000Hz / 600dpi×2.54=122.8cm / s. After 29kHz or P dot, start to use 400dpi resolution for inkjet printing, you can print out images that meet the requirements. Similarly, at the position of Q point when the ignition frequency is 40kHz, the printer's printing speed V 40kHz =40000Hz / 600dpi×2.54≈169cm / s, if 400dpi is used for printing in the third interval, the actual ignition frequency requ...

Example Embodiment

[0038] Example three

[0039] Such as Image 6 Shown is the nozzle characteristic curve of another nozzle during printing. It can be seen from the curve that the ink droplet ejection speed tends to be stable when the ignition frequency of this nozzle is less than 10kHz. This interval is defined as the first interval; ignition When the frequency is in the range of 10kHz to 16kHz, the ink droplet ejection speed fluctuates significantly. This interval is defined as the second interval; after the ignition frequency is greater than 16kHz, the ink droplet ejection speed becomes stable again until the maximum ignition frequency of the nozzle is 20kHz , Define this interval as the third interval.

[0040] In the process of accelerating the transmission of the printing medium, the ignition frequency gradually increases. In the first interval, since the ejection speed of ink drops is basically stable, the printed image effect can also be guaranteed. If the image resolution printed by the noz...

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PUM

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Abstract

The invention discloses an ink jet printing method. The ink jet printing method is characterized in that the ink jet printing method comprises the following steps that a, an ejection characteristic curve of a spray nozzle is subjected to interval partition according to waveform change and printing effects; b, the partitioned sections are tested to find printing driving pulses corresponding to sections separately; and c, printing is officially started, and in the printing process, a mode of switching the corresponding printing driving pulses is adopted in a spray nozzle control board to performdrive control on the sections. The printing method can switch compensation driving voltage or increase/decrease image printing resolution ratio under the condition that the ejection state is abnormalwhen a piezoelectric ceramic in the spray nozzle resonates during the increase of the ignition frequency, so that good printing quality is ensured; qualified printed images can be always printed in the process of accelerating the printing medium to a high transmission speed, so that the printing efficiency is improved.

Description

technical field [0001] The invention relates to an inkjet printing method, in particular to an inkjet printing method which ensures the stable ejection of ink droplets during the process of increasing the ignition frequency of the nozzle by changing the driving voltage. Background technique [0002] Inkjet printing is the process of forming an image by spraying ink droplets to reach the substrate. Inkjet printing has many advantages: low printing price, high printing quality, high-end products can be produced, large color capacity, high speed, variable information printing and Customization and more. At this stage, piezoelectric inkjet printing has been widely used. The principle of piezoelectric inkjet printing is to apply voltage to piezoelectric ceramics to cause high-speed and slight deformation, thereby pressing out the ink in the nozzle. When the piezoelectric ceramic is subjected to an external pulse voltage, the piezoelectric ceramic is deformed, thereby reducing th...

Claims

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Application Information

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IPC IPC(8): B41M5/00B41J2/04
CPCB41J2/04501B41M5/00
Inventor 张原张征宇
Owner BEIJING MEIKEYI
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