Single-nozzle partition printing method

Abstract

The invention relates to a single-nozzle partitioned printing method, which comprises the following steps of: partitioning a nozzle in a manner of setting a parting line along the moving direction of a printing platform to form a ground color nozzle hole region and a color nozzle hole region, and respectively carrying out ground color printing and color printing in a manner of carrying a medium back and forth double-stroke movement on the printing platform. The interval time between color printing and ground color printing can be prolonged through double-pass reciprocating type printing, so that color printing can be carried out after the ground color is fully dried and cured on a printing medium, and the color presentation effect of a product and the firmness of pattern printing are improved; according to the method, by means of the mode that the spray head is divided into the left area and the right area, the bottom printing bottom color or the covering layer spray hole area and the color spray hole area cannot be shielded mutually and can conduct printing in the advancing direction of the printing platform, all spray holes in the single spray head can be utilized, and the phenomenon that the spray holes are not used and wasted is avoided.

Description

Technical Field

[0001] This invention relates to the field of printing equipment, and more particularly to a single-head partition printing method. Background Technology

[0002] When printing color on dark or transparent materials, the printer needs to lay down a base coat first. This is because color inks are semi-transparent, and printing directly on a dark background would cause the colors to appear dark and grayish (e.g., red printed on black would appear dark red), or show other colors through the transparent material. The base coat acts like a "priming canvas," covering the original substrate so that subsequent colors can be rendered accurately and vividly, ensuring a clear and distortion-free image. After color printing is complete, additional steps may be taken as needed. Printing a transparent or semi-transparent overlay on the surface of the printed image can protect the image by resisting physical damage, blocking chemical erosion, and resisting environmental influences. At the same time, it can improve the gloss of the image, strengthen the medium, and stabilize the colors, thereby improving the image quality and extending its lifespan.

[0003] When printing background and color inks, the printheads in the print carriage are typically arranged alternately with the background ink printheads, using the sequential coordination of different printheads to complete the printing operation. However, printheads are expensive, and this combined printhead arrangement increases the number of printheads, thus raising equipment costs. To reduce costs, the industry often omits spot color printheads and instead improves color printheads to perform both color and spot color printing functions.

[0004] Current printhead improvements typically involve dividing the nozzles on the printhead into sections along the transverse direction (the direction of movement of the printing carriage), creating a front-to-back section printing structure. This allows for simultaneous color and background printing as the printhead and printing media move synchronously, reducing printhead costs. However, this approach has several problems: the color and background nozzle sections on the printhead are printed adjacent to each other with very short intervals. This results in the background not drying and curing sufficiently before color printing, affecting color reproduction and print adhesion. Furthermore, some nozzles on the printhead remain closed and idle (see invention patent publication number CN119590112A), leading to wasted nozzles. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a single-nozzle partition printing method.

[0006] The technical solution of this invention is: a single printhead partition printing method, the steps of which are as follows:

[0007] ① A dividing line is set in the middle of the printhead, and the length direction of the dividing line is consistent with the movement direction of the printing platform; ②The dividing line divides the nozzle into at least two areas, i.e. a first area for printing a base color or a cover layer and a second area for printing a color, the first area is connected with a base color ink supply system or a cover layer supply system, and the second area is connected with a color ink supply system;

[0008] ③One of the first area and the second area is closed, and the other is opened; ④The printing platform moves forward with the printing medium, and the printing carriage moves back and forth with the nozzle, at this time, the opened area in step ③ performs inkjet printing on the printing medium, and the printing platform stops moving forward when the printing of the area is completed; ⑤The opened area in step ③ is adjusted to be closed, and the closed area in step ③ is adjusted to be opened; ⑥The printing platform moves backward with the printing medium, and the printing carriage moves back and forth with the nozzle, at this time, the opened area in step ⑤ performs inkjet printing on the printing medium, and the printing platform stops moving backward when the printing of the area is completed.

[0009] Preferably, the dividing line divides the nozzle into two equal parts, so that the first area and the second area have the same area.

[0010] Preferably, after the execution of step ④, the printing carriage is paused for 1-5 seconds, and then step ⑥ is performed again.

[0011] Preferably, in step ③, the second area is closed, and the first area is opened; in step ④, the base color is printed, and in step ⑥, the color is printed.

[0012] Preferably, in step ③, the first area is closed, and the second area is opened; in step ④, the color is printed, and in step ⑥, the cover layer is printed.

[0013] Preferably, the printing medium is a textile, a plastic film or a plate.

[0014] Preferably, the base color is a treatment liquid or white.

[0015] Preferably, the cover layer is a varnish.

[0016] The present application has the following beneficial technical effects: (1) The present application divides the nozzle into a base color area and a color area by arranging a dividing line along the moving direction of the printing platform, and performs base color printing and color printing by moving the printing platform with the medium forward and backward, which can increase the interval time of color printing and base color printing, so that the base color can be fully dried and solidified before color printing, thereby improving the color presentation effect and the firmness of the pattern printing.

[0017] (2) The base color printing of the present application can be switched to cover layer printing, and the double reciprocating printing can increase the interval time of color printing and cover layer printing, so that the color can be printed after the printing medium is fully dried and solidified, avoiding the influence of the cover layer on the color rendering effect, and improving the pattern printing quality.

[0018] (3) The left and right partitioning of the nozzle makes the base printing color or cover layer nozzle area and the color nozzle area not block each other, and both can print in the direction of the printing platform, so that all the nozzles on the single nozzle can be utilized, avoiding the waste of nozzles. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure diagram of a single nozzle partitioning method (two dashed boxes in the figure are divided nozzle areas); Figure 2 is a structure diagram of another second partitioning method of a single nozzle (three dashed boxes in the figure are divided nozzle areas); Figure 3 is a structure diagram of another third partitioning method of a single nozzle (three dashed boxes in the figure are divided nozzle areas); Figure 4 is a relative relationship diagram between a single nozzle and a printing platform (a printing trolley is hidden);

[0020] In the figure, 1. nozzle, 11. dividing line, 12. nozzle, 21. processing liquid nozzle area, 22. white nozzle area, 23. color nozzle area, 24. varnish nozzle area, 3. printing platform. DETAILED DESCRIPTION

[0021] Example one, see attached Figure 1 、 4 A single nozzle partitioning printing method, which is used for printing base color and color, the steps are:

[0022] ① Multiple rows of nozzles 12 are arranged on the nozzle, and a dividing line 11 is arranged in the middle of the nozzle 1, and the length direction of the dividing line 11 is consistent with the moving direction of the printing platform 3; ② The dividing line 11 divides the nozzle 1 into a nozzle area A for printing base color and a nozzle area B for printing color, the nozzle area A is connected with a base color ink supply system, and the nozzle area B is connected with a color ink supply system; the nozzle 1 can be divided in a bisection manner, so that the areas of the two nozzle areas are the same, and then the printing areas covered by the base color printing and the color printing are the same, the speed of the printing platform 3 and the printing trolley during the base color printing and the color printing is close, and the printing efficiency is improved.

[0023] The base color is treated liquid or white, and the nozzle 1 is divided into a treated liquid nozzle area 21, a color nozzle area 23 or a white nozzle area 22, and a color nozzle area 23.

[0024] ③Close the nozzle area B and open the nozzle area A; ④The printing platform 3 carries the printing medium to move forward, and the printing medium is a textile, a plastic film or a plate. The printing trolley carries the nozzle 1 to move back and forth horizontally. At this time, the nozzle area A prints the base color on the printing medium. After the base color is printed, the printing platform 3 stops moving forward.

[0025] This step can optionally stop the printing platform 3 for 1-5 seconds. By temporarily stopping the printing trolley and the printing platform 3, the interval time of base color printing and color printing is further improved, and the drying and curing effect of the base color on the printing medium is further improved.

[0026] ⑤Open the nozzle area B and close the nozzle area A; ⑥The printing platform 3 carries the printing medium to move backward, and the printing trolley carries the nozzle 1 to move back and forth horizontally. At this time, the nozzle area B prints the color on the base color. After the printing of this nozzle area is completed, the printing platform 3 stops moving backward.

[0027] This embodiment divides the nozzle 1 by setting a division line 11 along the moving direction of the printing platform 3, forming a base color nozzle area and a color nozzle area. The printing platform 3 carries the medium to move forward and backward in double journey to print the base color and the color respectively. The double journey reciprocating printing can increase the interval time of color printing and base color printing, so that the color printing can be performed after the base color is fully dried and cured on the printing medium, improving the color presentation effect and the firmness of the pattern printing of the product.

[0028] Embodiment two, see attached Figure 1 、 4 A single nozzle partition printing method for printing color and cover layer, the steps are:

[0029] ①A plurality of rows of nozzles 12 are arranged on the nozzle, and a division line 11 is arranged in the middle of the nozzle 1. The length direction of the division line 11 is consistent with the moving direction of the printing platform 3. ②The division line 11 divides the nozzle 1 into a nozzle area A for printing the cover layer and a nozzle area B for printing the color. The nozzle area A is connected with the cover layer supply system, and the nozzle area B is connected with the color ink supply system. The nozzle 1 can be divided in a bisection manner, so that the area of the cover layer nozzle area and the color nozzle area 23 is the same, and the printing area covered by the cover layer printing and the color printing is the same. The speed of the printing platform 3 and the printing trolley during the cover layer printing and the color printing is close, and the printing efficiency is improved.

[0030] The cover layer is coated with a gloss oil, and the nozzle 1 is divided into a color nozzle area 23 and a cover layer nozzle area.

[0031] ③ Close the nozzle area A and open the nozzle area B; ④ The printing platform 3 carries the printing medium to move forward, and the printing car carries the nozzle 1 to move back and forth, at which time the nozzle area B prints color on the printing medium, the color printing is completed, and the printing platform 3 stops moving forward; this step can choose to stop the printing platform 3 for 1-5 seconds, and further increase the interval time of the cover layer printing and the color printing by stopping the printing car and the printing platform 3 for a short time, so as to avoid the influence of the cover layer on the color presentation effect.

[0032] ⑤ Open the nozzle area A and close the nozzle area B; ⑥ The printing platform 3 carries the printing medium to move backward, and the printing car carries the nozzle 1 to move back and forth, at which time the nozzle area A prints the cover layer on the color, and the printing platform 3 stops moving backward.

[0033] This embodiment switches the base color printing to the cover layer printing according to the partition printing method of embodiment one, and the double-trip reciprocating printing can increase the interval time of the color printing and the cover layer printing, so that the color can be fully dried and solidified on the printing medium before the cover layer printing, thereby avoiding the influence of the cover layer on the color presentation effect and improving the pattern printing quality.

[0034] Embodiment three, see the attached Figure 2 、 4 A single nozzle partition printing method, which is used for printing treatment liquid, white color and color, and the steps are as follows:

[0035] ① The nozzle is provided with multiple rows of nozzles 12, and the nozzle 1 is uniformly provided with two dividing lines 11, the length direction of the dividing line 11 is consistent with the moving direction of the printing platform 3; ② The two dividing lines 11 divide the nozzle 1 from one side to the other side into a treatment liquid nozzle area 21, a white color nozzle area 22 and a color nozzle area 23 in sequence, the treatment liquid nozzle area 21 is connected with a treatment liquid supply system, the white color nozzle area 22 is connected with a white ink supply system, and the color nozzle area 23 is connected with a color ink supply system;

[0036] ③ Close the color nozzle area 23 and the white color nozzle area 22, and open the treatment liquid nozzle area 21; ④ The printing platform 3 carries the printing medium to move forward, and the printing car carries the nozzle 1 to move back and forth, at which time the treatment liquid nozzle area 21 prints the treatment liquid on the printing medium, the treatment liquid printing is completed, and the printing platform 3 stops moving forward.

[0037] ⑤ open the white nozzle area 22, close the processing liquid nozzle area 21, and keep the color nozzle area 23 closed; ⑥The printing platform 3 carries the printing medium to move longitudinally backward, and the printing trolley carries the printhead 1 to move transversely back and forth. At this time, the white nozzle area 22 prints white on the processing liquid, and the printing platform 3 stops moving backward after the printing of the nozzle area is completed.

[0038] ⑦Open the color nozzle area 23, close the white nozzle area 22, and keep the processing liquid nozzle area 21 closed; ⑧The printing platform 3 carries the printing medium to move longitudinally forward again, and the printing trolley carries the printhead 1 to move transversely back and forth. At this time, the color nozzle area 23 prints color on the white, and the printing platform 3 stops moving forward after the printing of the nozzle area is completed.

[0039] This embodiment divides the single printhead into processing liquid, white, and color three printhead 1 areas, and the printing platform 3 reciprocates once and a half to realize the product printing processing liquid, white, and color three printing processes, further improving the utilization rate of the single printhead and reducing the cost of the printhead 1, which is more remarkable.

[0040] Embodiment four, see attached Figures 3-4 A single printhead partition printing method, which is used for printing processing liquid, color, and varnish, and the steps are as follows:

[0041] ①The printhead is provided with multiple rows of nozzles 12, and the printhead 1 is uniformly provided with two dividing lines 11, and the length direction of the dividing line 11 is consistent with the moving direction of the printing platform 3; ②The two dividing lines 11 divide the printhead 1 from one side to the other side into a processing liquid nozzle area 21, a color nozzle area 23, and a varnish nozzle area 24 in turn, the processing liquid nozzle area 21 is connected with a processing liquid supply system, the color nozzle area 23 is connected with a color ink supply system, and the varnish nozzle area 24 is connected with a varnish ink supply system;

[0042] ③Close the color nozzle area 23 and the varnish nozzle area 24, and open the processing liquid nozzle area 21; ④The printing platform 3 carries the printing medium to move longitudinally forward, and the printing trolley carries the printhead 1 to move transversely back and forth. At this time, the processing liquid nozzle area 21 prints processing liquid on the printing medium, and the printing platform 3 stops moving forward after the processing liquid printing is completed.

[0043] ⑤Open the color nozzle area 23, close the processing liquid nozzle area 21, and keep the varnish nozzle area 24 closed; ⑥The printing platform 3 carries the printing medium to move longitudinally backward, and the printing trolley carries the printhead 1 to move transversely back and forth. At this time, the color nozzle area 23 prints color on the processing liquid, and the printing platform 3 stops moving backward after the printing of the nozzle area is completed.

[0044] ⑦Open the gloss ink spray hole area 24, close the color ink spray hole area 23, and keep the processing liquid spray hole area 21 closed; ⑧The printing platform 3 carries the printing medium to move forward again, and the printing carriage carries the spray head 1 to move transversely, at this time the gloss ink spray hole area 24 prints gloss ink on the white color, until the printing of the spray hole area is completed, and the printing platform 3 stops moving forward.

[0045] In this embodiment, the single spray head is divided into three areas of processing liquid, color and gloss ink, and the printing platform 3 reciprocates half a time to realize the printing of processing liquid, color and gloss ink, further improving the utilization rate of the single spray head and reducing the cost of the spray head 1.

Claims

1. A single nozzle partition printing method, characterized by the following steps: Single nozzle partition ① A partition line is set in the middle of the nozzle, the length direction of the partition line is consistent with the moving direction of the printing platform; ② The partition line divides the nozzle into at least two nozzle areas, nozzle area A for printing base color or cover layer and nozzle area B for printing color, nozzle area A is connected with base color ink supply system or cover layer supply system, nozzle area B is connected with color ink supply system; Double printing ③ Close one of nozzle area A and nozzle area B, open the other one; ④ The printing platform carries the printing medium to move forward, the printing trolley carries the nozzle to move back and forth, at this time, the nozzle area opened in step ③ performs inkjet printing on the printing medium, until the printing of the nozzle area is completed, the printing platform stops moving forward; ⑤ Adjust the nozzle area opened in step ③ to be closed, and adjust the nozzle area closed in step ③ to be opened; ⑥ The printing platform carries the printing medium to move backward, the printing trolley carries the nozzle to move back and forth, at this time, the nozzle area opened in step ⑤ performs inkjet printing on the printing medium, until the printing of the nozzle area is completed, the printing platform stops moving backward.

2. A single-jet subzone printing method according to claim 1, characterized in that: The partition line divides the nozzle into two equal parts, so that the area of nozzle area A and nozzle area B is the same.

3. The method of claim 1, wherein: After step ④ is completed, the printing trolley pauses for 1-5 seconds, and then step ⑥ is performed again.

4. The method of claim 1, wherein: In step ③, nozzle area B is closed and nozzle area A is opened; in step ④, base color is printed, and in step ⑥, color is printed.

5. The method of claim 1, wherein: In step ③, nozzle area A is closed and nozzle area B is opened; in step ④, color is printed, and in step ⑥, cover layer is printed.

6. The method of claim 1, wherein: The printing medium is textile, plastic film or plate.

7. The method of claim 1, wherein: The base color is treatment liquid or white.

8. The method of claim 1, wherein: The cover layer is varnish. ​

Images