Cross printing method for CIJ ink-jet printer

A inkjet printer and inkjet printing technology, which is applied in printing and other directions, can solve the problems of low printing accuracy, printing height change, and poor printing quality, and achieve the effect of improving deflection accuracy, achieving printing accuracy and quality, and avoiding character confusion

Inactive Publication Date: 2015-11-18
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AI-Extracted Technical Summary

Problems solved by technology

[0005] To sum up, it can be seen that the step of charging each ink drop in each column of the charging pole is the key to controlling the printing speed and printing quality; The formula for calculating the force F is: F and charge Q 1 , Q 2 It is directly proportional to the distance r and inversely proportional to the distance r. The known charging method is: the charging power of ink droplets arranged in sequence in each column increases or decreases linearly, and the power difference between adjacent ink droplets is a fixed value Δq. During high-speed printing, the relative The distance between adjacent charged ink droplets is very close, and the electric charge difference between...
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Method used

The present invention is by changing the charging control of ink drop, makes adjacent ink drop electrical quantity difference increase, allows adjacent two ink point displacements to increase simultaneously, and then reduces the size and the size of Coulomb force (mutual repulsion force) between them The action time and reduce its influenc...
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The invention discloses a cross printing method for a CIJ ink-jet printer, and the method comprises the following steps: S1, generating control data according to to-be-printed image-text data, and transmitting the control data to a printing head, wherein the control data comprises a charging ink droplet number and the charging amount of each ink droplet; S2, enabling a spraying nozzle of the printing head to spray ink droplets at a high speed, enabling a charging electrode to select the ink droplets for charging, and achieving an electric quantity difference n* delta q between each two ink droplets, which are charged sequentially, in each column of a character matrix, wherein n is not less than two, and one delta q is the electric quantity difference between two ink droplets with the shortest distance therebetween on an ink-jet object; S3, enabling each column of ink droplets to be printed on the ink-jet object and to form a column of ink points after passing through a deflection electric field, wherein the cross printing means that there is at least one ink point between ink points which are sequentially printed on the ink-jet object in each column of ink droplets. The method avoids problems of image-text mess and fuzzy during high-speed printing, and improves the quality of high-speed printing.

Application Domain


Technology Topic

Electric fieldNozzle +5


  • Cross printing method for CIJ ink-jet printer
  • Cross printing method for CIJ ink-jet printer


  • Experimental program(1)

Example Embodiment

[0019] The cross printing method of CIJ inkjet printer disclosed in the present invention includes the following steps:
[0020] S1: Generate control data according to the graphic data to be printed, and send the control data to the print head. The control data includes the number of charged ink drops and the charge amount of each ink drop;
[0021] S2: The nozzle of the print head ejects ink droplets at a high speed, and the charging electrode selects ink droplets for charging. Each character matrix is ​​composed of several columns of ink droplets. In each column of the ink droplet constituting the character matrix, there is a band between two ink droplets that are sequentially charged. The power difference is n Δq, n≥2, where one Δq is the power difference between the two nearest ink dots on the printed matter;
[0022] S3: Since the electric power carried by the two ink droplets passing by in the deflection electric field differs by n (n≥2) Δq, there is at least one ink dot between the ink dots successively printed on the printed matter in a row of ink droplets, In the end, each column of ink droplets is cross-printed on the printed matter after passing the deflection electric field to form a column of ink dots.
[0023] See figure 1 Take a row of 7 ink dots as an example. Ink droplets 1-7 are ejected from nozzle 10 in turn, passing through the charging electrode 20 to wash up the corresponding amount of electricity. There is a difference of 3 Δq between ink drop 1 and ink drop 2, and ink drop 2 There is a difference of 3 Δq between ink and 3, a difference of 5 Δq between ink droplets 3 and 4, a difference of 3 Δq between ink droplets 4 and 5, and a difference of 2 Δq between ink droplets 5 and 6, ink droplets 6 and 7 There is a difference of 3 Δq between them. When the ink droplets 1, 2, 3, 4, 5, 6, and 7 pass through the deflection electric field 30 in turn, the deflection angles differ greatly, and the distances are also far apart. The repulsion between adjacent ink droplets 1 The force is small, and the final printing will form a column of ink dots 1-7 on the printed matter 40. There are ink droplets 4 and 6 between ink droplets 1 and 2, and 5 and 7 between ink droplets 2 and 3. Due to the reduced repulsive force, the ink dots 1-7 can be printed on the printing material 40 more accurately, and the final graphic characters are of course corrected, and the clarity of the writing is effectively improved; figure 2 Shown is a row of 9 ink droplets, with multiple ink droplets spaced between two consecutive ink droplets to achieve the same printing effect. Of course, a column of ink drops is not limited to 7 or 9 ink dots. For large-size characters, the number of ink drops in a column is quite large. The advantages of cross printing are also more obvious when large characters are printed at high speed.
[0024] By changing the charge control of the ink droplets, the present invention increases the power difference between adjacent ink droplets, and at the same time increases the displacement of two adjacent ink dots, thereby reducing the size and action time of the Coulomb force (mutual repulsion) between them. Reduce its impact on the original deflection trajectory, thereby improving the accuracy of ink drop deflection, making the position of each column of ink dots printed on the printed matter more accurate, realizing the improvement of printing accuracy and quality, and avoiding blurred images and texts during high-speed printing. The problem of character confusion.
[0025] The above are only specific embodiments of the present invention and do not limit the protection scope of the present invention. All equivalent changes made according to the design ideas of this case fall into the scope of protection of this case.


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Description & Claims & Application Information

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