Single-Pass printing device, control method and printing equipment

Abstract

The present invention belongs to the field of inkjet printing technology, solves the problem in the prior art that the ink output is too large, cracking occurs, or extreme diffusion occurs, resulting in unclear ink dots, and provides a Single-Pass printing device, control method and printing equipment. The Single-Pass printing device includes a first printing module and a second printing module for spraying a first ink and a second ink; the first printing module and the second printing module are spaced a preset distance apart and arranged in parallel in the transmission direction of the printing medium; a controller, the controller splits the ink volume in the printing data corresponding to the target printing image; then, the controller controls the first printing module and the second printing module to perform inkjet printing according to the same area and the split ink volume to generate the target printing image. By splitting the ink volume and re-inkjet printing in the same area, the single ink output is reduced while the total ink volume remains unchanged, solving the problems of excessive ink output and unclear ink dots.

Description

Technical Field

[0001] The present invention belongs to the technical field of inkjet printing, and in particular relates to a Single-Pass printing device, a control method and a printing equipment. Background Art

[0002] In the Single-Pass printing system, the traditional printing process is: one printing module inkjet prints one color at a time, and then pre-cures and final cures the area where the module inkjet prints, or multiple printing modules inkjet print multiple colors at a time, and then pre-cures and final cures the area where the inkjet prints. The pictures printed on the material by this printing process are prone to an overall bright light effect, which is difficult to meet the production needs of customers. In addition, this process is a one-time pre-curing only after a single color or multiple colors are printed. The ink output is too large, which can easily cause the ink to be extremely diffused on the material, resulting in unclear and uneven ink dots after final curing, resulting in poor image fineness. Summary of the invention

[0003] In view of this, the present invention provides a Single-Pass printing device, a control method and a printing equipment, which are used to solve the problem of unclear ink dots in printed images caused by excessive ink output before curing in the prior art.

[0004] The technical solution adopted by the present invention is:

[0005] In a first aspect, the present invention provides a Single-Pass printing device, characterized in that the printing device comprises:

[0006] A first printing module, comprising at least one nozzle, for spraying a first ink and a second ink different from the first ink;

[0007] A second printing module, comprising at least one nozzle, for spraying the first ink and the second ink, wherein the first printing module and the second printing module are spaced apart by a preset distance and are arranged in parallel in a printing medium transmission direction;

[0008] a controller, the controller splitting the ink amount of the first ink in the printing data corresponding to the target printing image into the first ink amount and the third ink amount, and splitting the ink amount of the second ink in the printing data corresponding to the target printing image into the second ink amount and the fourth ink amount;

[0009] The controller controls the first printing module to print the first amount of ink and the second amount of ink;

[0010] Then, the controller controls the second printing module to print again with the third ink amount in the area where the first ink amount was printed and to print again with the fourth ink amount in the area where the second ink amount was printed to generate the target printed image.

[0011] As a preferred embodiment of the Single-Pass printing device, the printing device further comprises: a pre-curing mechanism and a final curing mechanism, wherein the first printing module, the pre-curing mechanism, the second printing module and the final curing mechanism are sequentially arranged along a printing medium transmission direction.

[0012] As a preferred solution of the above-mentioned Single-Pass printing device, the controller controls the pre-curing mechanism to pre-curing the ink printed by the first printing module.

[0013] As a preferred solution of the above-mentioned Single-Pass printing device, the controller controls the final curing mechanism to perform final curing on the ink printed by the second printing module, and the power of the final curing mechanism for final curing is greater than the power of the pre-curing mechanism for pre-curing.

[0014] As a preferred solution of the above-mentioned Single-Pass printing device, each of the printing modules is provided with two rows of nozzles, and the nozzles in one row are staggered with the nozzles in another row along a first direction, and the first direction is perpendicular to the transmission direction of the printing medium.

[0015] As a preferred solution of the above-mentioned Single-Pass printing device, the first printing module is connected to a first ink storage mechanism, and the second printing module is connected to a second ink storage mechanism, the first ink storage mechanism is used to store the first ink and the second ink, and the second ink storage mechanism is also used to store the first ink and the second ink.

[0016] As a preferred solution of the above-mentioned Single-Pass printing device, the printing device further includes: a conveying platform and a conveyor belt arranged on the transmission platform, the conveying platform is arranged below the printing module, and the conveying platform is parallel to the first printing module.

[0017] As a preferred solution of the above-mentioned Single-Pass printing device, the printing device includes a plurality of printing modules, a controller, a pre-curing mechanism and a final curing mechanism, each of the printing modules includes a plurality of printing units, each of the printing units prints a type of ink, the controller splits the ink volume of the same type of ink in the printing data corresponding to the target printing image into the plurality of printing modules, and the controller controls the printing units printing the same type of ink to print again in the same area;

[0018] The plurality of printing modules and the plurality of printing module units are spaced apart by a preset distance and are arranged in parallel in the printing medium transmission direction. The pre-curing mechanism is arranged between adjacent printing modules and between adjacent printing module units. The final curing mechanism is arranged at the end of the printing units arranged in sequence away from the printing medium transmission direction.

[0019] In a second aspect, the present invention provides a method for controlling a Single-Pass printing device, the method comprising the following steps:

[0020] The Single-Pass printing device comprises: a first printing module, comprising at least one nozzle, for spraying a first ink and a second ink different from the first ink;

[0021] A second printing module, comprising at least one nozzle, for spraying the first ink and the second ink, wherein the first printing module and the second printing module are spaced apart by a preset distance and are arranged in parallel in a printing medium transmission direction;

[0022] The control method comprises:

[0023] Splitting the amount of the first ink required for printing the target printing image into the first ink amount and the third ink amount;

[0024] Splitting the amount of the second ink required for printing the target print image into the second ink amount and the fourth ink amount;

[0025] Transferring the printing medium to below the first printing module;

[0026] Controlling the first printing module to eject the first ink in the first ink amount and the second ink in the second ink amount;

[0027] When the inkjet printing of the first printing module is finished, pre-curing the area where the inkjet printing of the first printing module is completed;

[0028] While pre-curing, conveying the printing medium to below the second printing module;

[0029] Controlling the second printing module to eject the third amount of the first ink and the fourth amount of the second ink;

[0030] When the inkjet printing of the second printing module is completed, the area where the inkjet printing of the second printing module is completed is finally cured.

[0031] A third aspect provides a printing device, comprising any one of the above-mentioned Single-Pass printing devices.

[0032] In summary, the beneficial effects of the present invention are as follows:

[0033] In the Single-Pass printing device, control method and printing equipment of the present invention, the first printing module and the second printing module both print the same two inks, and the total ink volume of the first ink required for the target printed image is split into the first ink volume and the second ink volume through the controller, and the total ink volume of the second ink required for the target printed image is also split into the third ink volume and the fourth ink volume, so as to reduce the ink output of each ink in a single module, so that each color of ink is printed twice or more times, but the total ink volume of the target image remains unchanged, which will not affect the original printing quality, and can solve the problem of unclear and uneven ink dots caused by the extreme diffusion of ink dots in the printed image after the one-time ink output is too large and the final curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0035] Figure 1 Schematic diagram of the three-dimensional structure of the Single-Pass printing device in Example 2 of the present invention;

[0036] Figure 2 Schematic diagram of a bottom view of a Single-Pass printing device in Embodiment 2 of the present invention;

[0037] Figure 3 Schematic diagram of a top view of a Single-Pass printing device in Embodiment 2 of the present invention;

[0038] Figure 4 for Figure 2 A partial enlarged view of the arrangement of the nozzles in Example 2 of the present invention is shown;

[0039] Figure 5 Schematic diagram of ink storage mechanism distribution of the Single-Pass printing device in Example 2 of the present invention;

[0040] Figure 6 Schematic diagram of the structure of the transmission platform of the Single-Pass printing device in Example 2 of the present invention;

[0041] Figure 7 Schematic diagram of the arrangement of printing modules of the Single-Pass printing device in the comparative example;

[0042] Figure 8is a flow chart of a control method of a Single-Pass printing device in Example 6;

[0043] Fig. 9 A photo of a print medium after printing by the printing device in Example 1;

[0044] Fig.10 is a photograph of a printing medium after printing by the printing device in the comparative example;

[0045] Fig.11 This is a glossiness measurement result diagram of a printing medium after printing by the printing device in Example 1;

[0046] Fig.12 is a glossiness measurement result diagram of a printing medium after printing by a printing device in a comparative example;

[0047] Fig.13 This is a graph showing the ink dot uniformity effect of the printing medium after printing by the printing device in Example 1;

[0048] Fig.14 This is a diagram showing the ink dot uniformity effect of the printing medium after printing by the printing device in the comparative example.

[0049] Parts and numbers in the picture:

[0050] 1. Printing device; 11. First printing module; 111. First nozzle; 112. Second nozzle; 12. Second printing module; 121. Third nozzle; 122. Fourth nozzle; 13. Third printing module; 131. Fifth nozzle; 132. Sixth nozzle; 14. Fourth printing module; 141. Seventh nozzle; 142. Eighth nozzle; 15. Pre-curing mechanism; 16. Final curing mechanism; 17. Ink storage mechanism; 171. First ink storage mechanism; 172. Second ink storage mechanism; 173. Third ink storage mechanism; 174. Fourth ink storage mechanism; 175. First partition; 176. Second partition; 18. Conveying platform; 19. Conveying belt; 2. Printing medium. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.

[0052] Example 1

[0053] Embodiment 1 of the present invention discloses a Single-Pass printing device 1. Single-Pass printing means that the nozzle is fixed and does not move, and the printing medium 2 passes under the nozzle once to obtain the pattern to be printed, and the printing medium 2 is in continuous motion without pause.

[0054] Specifically, the printing device 1 comprises: a first printing module 11, comprising at least one nozzle for inkjet printing a first ink and a second ink different from the first ink;

[0055] The second printing module 12 includes at least one nozzle for inkjet printing the first ink and the second ink, wherein the first printing module 11 and the second printing module 12 are spaced apart by a preset distance and are arranged in parallel in the transmission direction of the printing medium 2;

[0056] a controller, the controller splitting the ink amount of the first ink in the print data corresponding to the target print image into the first ink amount and the third ink amount, and splitting the ink amount of the second ink in the print data corresponding to the target print image into the second ink amount and the fourth ink amount;

[0057] The controller controls the first printing module 11 to print a first amount of ink and a second amount of ink;

[0058] Then, the controller controls the second printing module 12 to print again with a third amount of ink in the area where the first amount of ink was printed and to print again with a fourth amount of ink in the area where the second amount of ink was printed to generate a target printed image.

[0059] The controller divides the first ink into the first printing module 11 and the second printing module 12, so that the amount of the first ink in a single printing module is reduced. Similarly, the second ink is divided into the first printing module 11 and the second printing module 12, so that the amount of the second ink in a single printing module is reduced, thereby reducing the amount of ink output of a single module at one time. The controller controls the second printing module 12 to perform inkjet printing of the same ink on the area printed by the first printing module 11 again, ensuring that the total amount of the same ink remains unchanged and does not affect the formation of the target image.

[0060] Specifically, the printing device 1 further includes: a pre-curing mechanism 15 and a final curing mechanism 16. The first printing module 11, the pre-curing mechanism 15, the second printing module 12 and the final curing mechanism 16 are sequentially arranged along the transmission direction of the printing medium 2. The pre-curing mechanism 15 first pre-cures the ink in the area printed by the first printing module 11, and then the second printing module 12 performs inkjet printing, and then performs final curing, that is, curing is performed once after each inkjet printing, thereby avoiding the problem of shrinkage and cracking of the image caused by pre-curing and final curing after the ink is discharged once in the prior art.

[0061] Example 2

[0062] See also Figures 1 to 6 The Single-Pass printing device 1 in Example 2 of the present invention is improved on the basis of Example 1.

[0063] Specifically, the printing device 11 includes a first printing module 11, a second printing module 12, a third printing module 13, a fourth printing module 14, a pre-curing mechanism 15 and a final curing mechanism 16, wherein the first printing module 11, the pre-curing mechanism 15, the third printing module 13, the pre-curing mechanism 15, the fourth printing module 14, the pre-curing mechanism 15, the second printing module 12 and the final curing mechanism 16 are arranged in parallel and in sequence along the transmission direction of the printing medium 2, and adjacent printing modules are spaced apart by a preset distance, which is a distance that can accommodate the pre-curing mechanism 15. The pre-curing mechanism 15 is arranged at the adjacent intervals of the printing modules, which can make the structure of the entire printing device 1 more compact, and also facilitate the curing process after the printing module is inkjetted. After the first printing module 11 finishes inkjetting the printing medium 2, the pre-curing mechanism 15 pre-cures the printing medium 2, and then the third printing module 13 performs inkjet printing on the printing medium 2. After the end, the pre-curing mechanism 15 pre-cures the printing medium 2 again until the printing medium 2 is subjected to the last inkjet printing. After the inkjet printing is completed, the final curing mechanism 16 final cures the printing medium 2. At this point, this part of the printing work is completed, that is, after each ink discharge, it will be cured to prevent ink diffusion and cracking of the formed image, making the ink color more stable and the formed image more stable.

[0064] To facilitate a better understanding of the first printing module 11, the second printing module 12, the third printing module 13 and the fourth printing module 14, they are now described respectively:

[0065] The first printing module 11 includes: a row of first nozzles 111 and a row of second nozzles 112. The row of first nozzles 111 and the row of second nozzles 112 are staggered along a first direction, which is a direction perpendicular to the transmission direction of the printing medium 2 and parallel to the first printing module 11.

[0066] The second printing module 12 includes: a row of third nozzles 121 and a row of fourth nozzles 122. The row of third nozzles 121 and the row of fourth nozzles 122 are staggered along the first direction.

[0067] The third printing module 13 includes: a row of fifth nozzles 131 and a row of sixth nozzles 132. The row of fifth nozzles 131 and the row of sixth nozzles 132 are staggered along the first direction.

[0068] The fourth printing module 14 includes: a row of seventh nozzles 141 and a row of eighth nozzles 142. The row of seventh nozzles 141 and the row of eighth nozzles 142 are staggered along the first direction.

[0069] The first printing module 11 is used for spraying a first ink and a second ink different from the first ink;

[0070] The second printing module 12 is used for spraying the first ink and the second ink;

[0071] The third printing module 13 is used for spraying a third ink and a fourth ink different from the third ink;

[0072] The fourth printing module 14 is used for spraying the third ink and the fourth ink;

[0073] The first ink, the second ink, the third ink and the fourth ink are all different, and the above four inks are inks of four primary colors required for printing a target image.

[0074] The first printing module 11 is connected to a first ink storage mechanism 171, the second printing module 12 is connected to a second ink storage mechanism 172, the third printing module 13 is connected to a third ink storage mechanism 173, and the fourth printing module 14 is connected to a fourth ink storage mechanism 174. Specifically, the first ink storage mechanism 171 is connected to the first nozzle 111 and the second nozzle 112, and the second ink storage mechanism 172 is connected to the third nozzle 121 and the fourth nozzle 122. The first ink storage mechanism 171 stores the first ink and the second ink required for the target printing image, and the second ink storage mechanism 172 stores the first ink and the second ink required for the target printing image. The first ink storage mechanism 171 is used to provide the first ink for the first nozzle 111 and the second ink for the second nozzle 112, and the second ink storage mechanism 172 is used to provide the first ink for the third nozzle 121 and the second ink for the fourth nozzle 122. Similarly, the fifth nozzle 131 and the sixth nozzle 132 are connected to the third ink storage mechanism 173, and the seventh nozzle 141 and the eighth nozzle 142 are connected to the fourth ink storage mechanism 174. The third ink storage mechanism 173 stores the third ink and the fourth ink required for the target printing image, and the fourth ink storage mechanism 174 stores the third ink and the fourth ink required for the target printing image. The third ink storage mechanism 173 is used to provide the third ink for the fifth nozzle 131 and the fourth ink for the sixth nozzle 132, and the fourth ink storage mechanism 174 is used to provide the third ink for the seventh nozzle 141 and the fourth ink for the eighth nozzle 142.

[0075] The printing device 1 further includes: a controller, which is electrically connected to the first printing module 11, the second printing module 12, the third printing module 13, the fourth printing module 14 and all the ink storage mechanisms 17, and is used to control the printing modules, the nozzles on the printing modules and the working process of the ink storage mechanisms 17. The controller controls the nozzles on each printing module to output ink at the corresponding pattern position on the printing medium 2, and also controls the ink storage mechanism 17 to distribute the ink amount. Two different inks are arranged in each ink storage mechanism 17, and a first partition 175 and a second partition 176 are arranged in each ink storage mechanism 17, wherein the first partition 175 stores one type of ink, and the second partition 176 stores a type of ink different from the ink stored in the first partition 175. The controller splits the ink amount of the first ink in the printing data corresponding to the target printing image into a first ink amount and a third ink amount, the controller splits the ink amount of the second ink in the printing data corresponding to the target printing image into a second ink amount and a fourth ink amount, the controller splits the ink amount of the third ink in the printing data corresponding to the target printing image into a fifth ink amount and a seventh ink amount, and the controller splits the ink amount of the fourth ink in the printing data corresponding to the target printing image into a sixth ink amount and an eighth ink amount. Among them, the first ink of the first ink quantity is stored in the first partition 175 of the first ink storage mechanism 171, the first ink of the third ink quantity is stored in the first partition 175 of the second ink storage mechanism 172, the second ink of the second ink quantity is stored in the second partition 176 of the first ink storage mechanism 171, the second ink of the fourth ink quantity is stored in the second partition 176 of the second ink storage mechanism 172, the third ink of the fifth ink quantity is stored in the first partition 175 of the third ink storage mechanism 173, the third ink of the seventh ink quantity is stored in the first partition 175 of the fourth ink storage mechanism 174, the fourth ink of the sixth ink quantity is stored in the second partition 176 of the third ink storage mechanism 173, and the fourth ink of the eighth ink quantity is stored in the second partition 176 of the fourth ink storage mechanism 174. The controller splits the ink volume of the same ink and distributes it to different ink storage mechanisms 17. The same ink is inkjet printed by two printing modules respectively, so that the required total amount of ink remains unchanged, but it is divided into two printings, thereby reducing the ink output of the same ink at a single time and solving the problem of excessive ink output of the same ink at a single time. Secondly, each printing module prints two inks. Compared with the prior art, although the ink output of the same ink at a single time is reduced, the same printing module will also print another ink, that is, it can be ensured that the number of printing modules does not need to be increased, and the total ink injection required to form the target printed image can still be completed.

[0076] In order to ensure that the total amount of ink of the same ink forming the target pattern remains unchanged, the controller is also required to control the printing module as follows:

[0077] The controller controls the first printing module 11 to print the first ink of the first ink volume and the second ink of the second ink volume; the controller controls the second printing module 12 to print the first ink again in the area where the first ink volume is printed according to the third ink volume and to print the second ink again in the area where the second ink volume is printed according to the fourth ink volume; the controller controls the third printing module 13 to print the third ink of the fifth ink volume and the fourth ink of the sixth ink volume; the controller controls the fourth printing module 14 to print the third ink again in the area where the fifth ink volume is printed according to the seventh ink volume and to print the fourth ink again in the area where the sixth ink volume is printed according to the eighth ink volume to generate the target printed image. By controlling the printing module to spray the same ink in the same area, it is ensured that the ink volume of the ink in the area can meet the ink volume of the ink required for the target printing pattern, and it will not cause confusion between different inks, resulting in the situation that the target pattern cannot be formed.

[0078] The printing device 1 further includes: a conveying platform 18 and a conveyor belt 19 arranged on the transmission platform. The conveying platform 18 is used to provide power for conveying the printing medium 2 and to support the conveyor belt 19. The transmission belt is used to carry the printing medium 2 and transmit the power of the printing platform to the printing medium 2 to realize the transmission of the printing medium 2. The conveying platform 18 is arranged below the printing module, and the conveying platform 18 is parallel to the end face of the nozzle of the first printing module 11. Compared with the inclined platform, the conveying platform 18 is parallel to the end face of the nozzle of the first printing module 11, which is more convenient for the nozzle to control the range of inkjet, and the inkjet on the printing medium 2 is more uniform.

[0079] Specifically, the end faces of the nozzles of the four printing modules are all arranged on the same horizontal plane, so as to facilitate the uniform adjustment of the inkjet distance and control the inkjet range.

[0080] Specifically, the nozzle on each printing module can adopt Ricoh's G5 nozzle or G6 nozzle.

[0081] Specifically, the power of the pre-curing mechanism 15 is smaller than the power of the final curing mechanism 16 .

[0082] The printing device 1 has multiple arrangement sequences for different types of inks, wherein the ink colors include C ink, M ink, Y ink and K ink. The ink colors sprayed by each nozzle in Example 2 are shown in Table 1:

[0083] Example 2 Example 4 Example 5 The ink color of the first nozzle K K Y The ink color of the second nozzle C M K The ink color of the third nozzle K K Y The ink color of the fourth nozzle C M K The ink color of the fifth nozzle M C C The ink color of the sixth nozzle Y Y M The ink color of the seventh nozzle M C C The ink color of the eighth nozzle Y Y M

[0084] Table 1

[0085] The working principle of the Single-Pass printing device 1 in Embodiment 2 is as follows:

[0086] The printing medium 2 is placed on a conveying platform 18 provided with a conveyor belt 19. When the printing medium 2 is conveyed to the bottom of the printing module, the corresponding printing module will perform inkjet printing on the printing medium 2. The printing medium 2 passes through the first printing module 11, the third printing module 13, the fourth printing module 14, and the second printing module 12 in sequence. After each printing module, the corresponding pre-curing mechanism 15 will pre-cure the ink on the printing medium 2 until it passes through the second printing module 12 and reaches the final curing mechanism 16, where the ink is finally cured. The first nozzle 111 in the first printing module 11 and the third nozzle 121 in the second printing module 12 will be in the same area of ​​the printing medium 2. The first ink is sprayed, the second nozzle 112 in the first printing module 11 and the fourth nozzle 122 in the second printing module 12 will spray the second ink, the fifth nozzle 131 in the third printing module 13 and the seventh nozzle 141 in the fourth printing module 14 will spray the third ink, the sixth nozzle 132 in the third printing module 13 and the eighth nozzle 142 in the fourth printing module 14 will spray the fourth ink, the ink sprayed by the third printing module 13 is the same as the ink sprayed by the fourth printing module 14, the ink sprayed by the second printing module 12 is the same as the ink sprayed by the first printing module 11, and this part of the printing work is completed after the printing medium 2 passes through the four printing modules and is finally cured.

[0087] Example 3

[0088] The Single-Pass printing device 1 in the third embodiment of the present invention is improved on the basis of the first embodiment.

[0089] Specifically, the printing device 1 includes a plurality of printing modules, a controller, a pre-curing mechanism 15 and a final curing mechanism 16. Each printing module includes a plurality of printing units. Since there are four primary colors of ink to be printed, it is preferred to set four printing units in each printing module. This is not a limit on the number of printing units or printing modules. Each printing unit prints one ink. The controller is electrically connected to the printing module, the pre-curing mechanism 15 and the final curing mechanism 16. The controller splits the ink amount of the same ink in the printing data corresponding to the target printed image into multiple printing modules, and the controller controls the printing units printing the same ink to print again in the same area. By setting up multiple groups of printing modules, the ink amount that meets the target printed image is split, and the number of printing modules can be increased or decreased as needed to arbitrarily distribute the ink amount.

[0090] A preset distance is set between the multiple printing units and the multiple printing modules and they are arranged in parallel along the transmission direction of the printing medium 2. The pre-curing mechanism 15 is set between adjacent printing units and adjacent printing modules, and the final curing mechanism 16 is set at the end of the printing units arranged in sequence away from the transmission direction of the printing medium 2. After the last printing unit finishes inkjetting, the ink is finally cured to stabilize the ink color.

[0091] According to the ink output requirement of the target printing image for each ink, the printing unit is increased in multiples, that is, from the original four printing units to eight printing units, twelve printing units, and so on, and the corresponding pre-curing mechanism 15 and final curing mechanism 16 are also changed accordingly, so that the amount of each ink is changed to be sprayed from multiple groups of printing units, so as to achieve the purpose of keeping the required total ink volume unchanged and reducing the single ink output of the printing unit.

[0092] Example 4

[0093] The Single-Pass printing device 1 in the fourth embodiment of the present invention is improved on the basis of the first embodiment. Specifically, the ink colors ejected by each nozzle in the Single-Pass printing device 1 in the fourth embodiment are shown in Table 1. The rest of the structure and working principle of the fourth embodiment are the same as those of the second embodiment.

[0094] Example 5

[0095] The Single-Pass printing device 1 in the fifth embodiment of the present invention is improved on the basis of the first embodiment. Specifically, the ink colors ejected by each nozzle in the Single-Pass printing device 1 in the fifth embodiment are shown in Table 1. The rest of the structure and working principle of the fifth embodiment are the same as those of the second embodiment.

[0096] Example 6

[0097] Embodiment 6 of the present invention discloses a control method of a Single-Pass printing device including any one of Embodiments 1 to 5 above, and the control method is as follows:

[0098] The single-pass printing device 1 comprises: a first printing module 11, comprising at least one nozzle for spraying a first ink and a second ink different from the first ink;

[0099] The second printing module 12 includes at least one nozzle for spraying the first ink and the second ink, wherein the first printing module 11 and the second printing module 12 are spaced apart by a preset distance and are arranged in parallel in the transmission direction of the printing medium 2;

[0100] Control methods include:

[0101] Splitting the amount of the first ink required for printing the target printing image into the first ink amount and the third ink amount;

[0102] Splitting the amount of the second ink required for printing the target print image into the second ink amount and the fourth ink amount;

[0103] Transfer the printing medium 2 to below the first printing module 11;

[0104] Controlling the first printing module 11 to eject a first ink of a first ink volume and to eject a second ink of a second ink volume having a different ink color from the first ink;

[0105] When the inkjet printing of the first printing module 11 is completed, the area where the inkjet printing of the first printing module 11 is performed is pre-cured;

[0106] While pre-curing, the printing medium 2 is transported to the bottom of the second printing module 12;

[0107] Control the second printing module 12 to spray a third amount of the first ink in the same area where the first printing module 11 sprays the first ink, and to spray a fourth amount of the second ink in the same area where the first printing module 11 sprays the second ink;

[0108] When the inkjet printing of the second printing module 12 is completed, the inkjet printed area of ​​the second printing module 12 is finally cured.

[0109] By splitting the ink amount of the first ink and the ink amount of the second ink required for the target printing image, and distributing the split ink amounts of the same ink to different printing modules respectively, the same ink is sprayed from different printing modules, thereby reducing the single ink output of the same ink; and by controlling the areas where the first printing module 11 and the second printing module 12 are inkjet printed to be the same, it is ensured that the total amount of ink required for the formation of the target printing image does not change, and will not affect the generation of the image; and by performing pre-curing after the first printing module 11 finishes inkjetting, and performing final curing after the second printing module 12 finishes inkjetting, that is, curing is performed once after each inkjet is completed, which is beneficial to enhance the stability of the ink color and prevent ink diffusion and image cracking.

[0110] Example 7

[0111] Embodiment 7 of the present invention discloses a printing device, which includes any one of the Single-Pass printing devices 1 in Embodiments 1 to 3.

[0112] In Embodiment 7 of the present invention, the printing medium 2 is placed on a conveying platform 18 provided with a conveyor belt 19. When the printing medium 2 is conveyed to the bottom of the printing module, the corresponding printing module will perform inkjet printing on the printing medium 2. The printing medium 2 passes through the first printing module 11, the third printing module 13, the fourth printing module 14, and the second printing module 12 in sequence. After each printing module, the corresponding pre-curing mechanism 15 will pre-cure the ink on the printing medium 2 until it passes through the second printing module 12 and reaches the final curing mechanism 16, where the ink is finally cured. The first nozzle 111 in the first printing module 11 and the third nozzle 121 in the second printing module 12 will be pre-cured on the printing medium 2. The first ink is sprayed in the same area, the second nozzle 112 in the first printing module 11 and the fourth nozzle 122 in the second printing module 12 will spray the second ink, the fifth nozzle 131 in the third printing module 13 and the seventh nozzle 141 in the fourth printing module 14 will spray the third ink, the sixth nozzle 132 in the third printing module 13 and the eighth nozzle 142 in the fourth printing module 14 will spray the fourth ink, the ink sprayed by the third printing module 13 is the same as the ink sprayed by the fourth printing module 14, the ink sprayed by the second printing module 12 is the same as the ink sprayed by the first printing module 11, and this part of the printing work is completed after the printing medium 2 passes through the four printing modules and is finally cured.

[0113] Comparative Example

[0114] Please refer to Figure 7 In this comparative example, in the prior art, one printing module is used to print one color of ink. The first printing module prints K color ink, the second printing module prints C color ink, the third printing module prints M color ink, and the fourth printing module prints Y color ink.

[0115] After the printing of the printing medium 2 in the embodiment 2 and the comparative example is completed, the light effects of the printing medium 2 printed by the embodiment 2 and the comparative example are observed respectively, wherein the printing medium 2 after printing in the embodiment 2 is photographed as shown in FIG. Fig. 9 As shown, the print medium 2 after the comparative printing is photographed. Fig.10 As shown, compared Fig. 9 and Fig.10 It can be seen that the print medium 2 printed in Example 2 has lower glossiness than the print medium 2 printed in the comparative example.

[0116] At the same time, the glossiness of the printed media 2 after printing in Example 2, Example 4, Example 5 and the comparative example was measured by a glossiness measuring instrument. The glossiness of the printed media 2 after printing in Example 2 is as follows: Fig.11As shown, the glossiness of the printing medium 2 after printing in Example 2 is 2.4; the glossiness of the printing medium 2 after printing in Example 4 is 2.9; the glossiness of the printing medium 2 after printing in Example 5 is 3.3; the glossiness of the printing medium 2 after printing in the comparative example is as shown in FIG. Fig.12 As shown, the glossiness of the print medium 2 after the comparative example printing is 18.2. Therefore, it can be seen from the measurement results that the print medium 2 printed by Example 2, Example 4, and Example 5 has lower glossiness than the print medium 2 printed by the comparative example, that is, the print medium 2 printed by Example 2, Example 4, and Example 5 is more matte than the print medium 2 printed by the comparative example. The print medium 2 printed by Example 2, Example 4, and Example 5 presents a matte effect. Compared with the glossy effect of the print medium 2 printed by the comparative example, the matte effect can meet more user needs, has a better visual effect, and has a frosted texture effect.

[0117] After the printing of the printing medium 2 in Example 2 and the comparative example is completed, the uniformity of the ink dots of the printing medium 2 printed by Example 2 and the comparative example is observed respectively, wherein the printing medium 2 after printing in Example 2 is photographed as shown in FIG. Fig.13 As shown ( Fig.13 For selection Fig. 9 The print medium 2 after the comparative printing is photographed as shown in FIG. Fig.14 As shown ( Fig.14 For selection Fig.10 Take a photo of the local area in the image) and compare Fig.13 and Fig.14 It can be seen that the ink dots of the printing medium 2 printed by Example 2 are more uniform than those of the printing medium 2 printed by the comparative example.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Single-Pass printing device, characterized in that: The printing device comprises: A first printing module, comprising at least one nozzle, for spraying a first ink and a second ink different from the first ink; A second printing module, comprising at least one nozzle, for spraying the first ink and the second ink, wherein the first printing module and the second printing module are spaced apart by a preset distance and are arranged in parallel in a printing medium transmission direction; Each of the printing modules is provided with two rows of nozzles, and the nozzles in one row are staggered with the nozzles in the other row along a first direction, wherein the first direction is perpendicular to the transmission direction of the printing medium; The first printing module is connected to a first ink storage mechanism, and the second printing module is connected to a second ink storage mechanism, the first ink storage mechanism is used to store the first ink and the second ink, and the second ink storage mechanism is also used to store the first ink and the second ink; each ink storage mechanism is provided with a first partition and a second partition, wherein the first partition stores the first ink or the second ink, and the second partition stores the second ink or the first ink different from the ink stored in the first partition; A controller, the controller being electrically connected to all the printing modules and all the ink storage mechanisms, and being used to control the working processes of all the printing modules, all the nozzles on the printing modules, and all the ink storage mechanisms; The controller divides the ink volume of the first ink in the printing data corresponding to the target printing image into the first ink volume and the third ink volume, and divides the ink volume of the second ink in the printing data corresponding to the target printing image into the second ink volume and the fourth ink volume; The controller controls the row of nozzles of the first printing module to print the first amount of ink and controls the other row of nozzles of the first printing module to print the second amount of ink; Then, the controller controls the row of nozzles of the second printing module to print again according to the third amount of ink in the area where the first amount of ink was printed, and controls the other row of nozzles of the second printing module to print again according to the fourth amount of ink in the area where the second amount of ink was printed to generate the target printed image.

2. The Single-Pass printing device according to claim 1, characterized in that: The printing device further includes: a pre-curing mechanism and a final curing mechanism, and the first printing module, the pre-curing mechanism, the second printing module and the final curing mechanism are arranged in sequence along the transmission direction of the printing medium.

3. The Single-Pass printing device according to claim 2, characterized in that: The controller controls the pre-curing mechanism to pre-curing the ink printed by the first printing module.

4. The Single-Pass printing device according to claim 3, characterized in that: The controller controls the final curing mechanism to perform final curing on the ink printed by the second printing module, and the power of the final curing mechanism for final curing is greater than the power of the pre-curing mechanism for pre-curing.

5. The Single-Pass printing device according to claim 1, characterized in that: The printing device further includes: a conveying platform and a conveying belt arranged on the conveying platform. The conveying platform is arranged below all the printing modules, and the conveying platform is parallel to the first printing module.

6. The Single-Pass printing device according to claim 1, characterized in that: The printing device includes a plurality of printing modules, a controller, a pre-curing mechanism, and a final curing mechanism, each of the printing modules includes a plurality of nozzles, each of the nozzles prints a type of ink, the controller divides the ink volume of the same type of ink in the printing data corresponding to the target printing image into the plurality of printing modules, and the controller controls the nozzles printing the same type of ink to print again in the same area; The plurality of printing modules and the plurality of nozzles are spaced apart by a preset distance and are arranged in parallel in the printing medium transmission direction. The pre-curing mechanism is arranged between adjacent printing modules and adjacent nozzles. The final curing mechanism is arranged at the end of the nozzles arranged in sequence away from the printing medium transmission direction.

7. A control method for a Single-Pass printing device, characterized in that: The Single-Pass printing device as claimed in any one of claims 1 to 6 comprises: a first printing module, comprising at least one nozzle for ejecting a first ink and a second ink different from the first ink; A second printing module, comprising at least one nozzle, for spraying the first ink and the second ink, wherein the first printing module and the second printing module are spaced apart by a preset distance and are arranged in parallel in a printing medium transmission direction; Each of the printing modules is provided with two rows of nozzles, and the nozzles in one row are staggered with the nozzles in the other row along a first direction, wherein the first direction is perpendicular to the transmission direction of the printing medium; The first printing module is connected to a first ink storage mechanism, and the second printing module is connected to a second ink storage mechanism, the first ink storage mechanism is used to store the first ink and the second ink, and the second ink storage mechanism is also used to store the first ink and the second ink; The control method comprises: Splitting the amount of the first ink required for printing the target printing image into the first ink amount and the third ink amount; Splitting the amount of the second ink required for printing the target print image into the second ink amount and the fourth ink amount; Transferring the printing medium to below the first printing module; Controlling the row of nozzles of the first printing module to eject the first ink in the first ink volume, and controlling the other row of nozzles of the first printing module to eject the second ink in the second ink volume; When the inkjet printing of the first printing module is finished, pre-curing the area where the inkjet printing of the first printing module is completed; While pre-curing, conveying the printing medium to below the second printing module; Controlling the one row of nozzles of the second printing module to eject the third amount of the first ink in the area where the first amount of ink is ejected, and controlling the other row of nozzles of the second printing module to eject the fourth amount of the second ink in the area where the second amount of ink is ejected; When the inkjet printing of the second printing module is completed, the area where the inkjet printing of the second printing module is completed is finally cured.

8. A printing device, characterized in that: The printing device comprises the Single-Pass printing apparatus as described in any one of claims 1 to 6.

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