A method for spraying and printing white oil blocks and a digital spraying and printing device

Abstract

Embodiments of the present invention relate to the field of digital inkjet printing technology, and disclose a printing method for white oil blocks and a digital inkjet printing device. The printing method first prints and cures a dam for the white oil blocks on the printing material along a first direction, and then, prints the white oil blocks once in the dam along the first direction or a second direction. Finally, the white oil blocks are printed twice along the first direction and cured. Wherein, the first direction and the second direction are opposite directions. The printing method provided by the embodiments of the present invention can perform a certain degree of leveling and extension through the first printing without curing the white oil blocks before the second printing, so that the finally printed white oil blocks on the printing material are flat and full.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of digital inkjet printing, and in particular, to a method for printing white oil blocks and a digital inkjet printing device. Background Art

[0002] There are two main objects for digital inkjet printing of characters on printed circuit boards (PCBs). One is characters (letters, lines, etc.), and the other is large-area white oil blocks. Characters require fineness, sharp edges, and clear appearance; white oil blocks require flatness and fullness. In the traditional silk screen character process, it is easy to achieve fullness and flatness of white oil blocks.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that at least the following problems exist in the above related technologies: Digital inkjet printing forms a surface by stacking dots. In theory, it can also achieve fullness and flatness. However, there is a risk that the inkjet nozzles of the printhead may not eject ink or eject ink poorly. If there is an inclined ejection or non-ejection of ink from the nozzles, the printed white oil blocks will appear uneven, with incomplete white oil blocks and obvious depth lines. Summary of the Invention

[0004] Embodiments of the present application provide a method for printing white oil blocks and a digital inkjet printing device, which can solve the problems that the white oil blocks printed by digital printing are prone to unevenness and depth lines.

[0005] The objectives of the embodiments of the present invention are achieved through the following technical solutions:

[0006] To solve the above technical problems, in a first aspect, embodiments of the present invention provide a method for printing white oil blocks, including: printing and curing a dam for the white oil blocks on a printing material along a first direction; printing the white oil blocks once within the dam along the first direction or a second direction; printing the white oil blocks twice along the first direction and curing; where the first direction and the second direction are opposite directions.

[0007] In some embodiments, before printing and curing the dam for the white oil blocks on the printing material along the first direction, the method further includes: obtaining a printed design pattern of the white oil blocks; identifying the white oil blocks according to the printed design pattern and generating white oil block printing data; identifying the area edges of the white oil blocks and generating dam printing data for the white oil blocks.

[0008] In some embodiments, the printing and curing the dam for the white oil blocks on the printing material along the first direction includes: controlling the printhead to move along the first direction, and simultaneously controlling the printhead to print the dam on the printing material according to the dam printing data; drying and curing the dam through an ultraviolet curing lamp.

[0009] In some embodiments, when printing the white oil block once in the dam along the second direction, the printing of the white oil block once in the dam along the first direction or the second direction includes: controlling the nozzle to move along the second direction, and at the same time controlling the nozzle to print the white oil block once on the printing material according to the white oil block printing data.

[0010] In some embodiments, the second printing of the white oil block along the first direction and curing includes: controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to print the white oil block twice on the printing material according to the white oil block printing data; drying and curing the white oil block by an ultraviolet light curing lamp.

[0011] In some embodiments, when printing the white oil block once in the dam along the first direction, the printing of the white oil block once in the dam along the first direction or the second direction includes: controlling the nozzle to return, and after the nozzle returns to the origin, controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to print the white oil block once on the printing material according to the white oil block printing data.

[0012] In some embodiments, the second printing of the white oil block along the first direction and curing includes: controlling the nozzle to return again, and after the nozzle returns to the origin, controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to print the white oil block twice on the printing material according to the white oil block printing data; drying and curing the white oil block by an ultraviolet light curing lamp.

[0013] In some embodiments, printing the dam for the white oil block on the printing material along the first direction and curing includes: controlling the printing material to move along the second direction, and at the same time controlling the nozzle to print the dam on the printing material according to the dam printing data; drying and curing the dam by an ultraviolet light curing lamp.

[0014] In some embodiments, when printing the white oil block once in the dam along the second direction, the printing of the white oil block once in the dam along the first direction or the second direction includes: controlling the printing material to move along the first direction, and at the same time controlling the nozzle to print the white oil block once on the printing material according to the dam printing data.

[0015] In some embodiments, the second printing of the white oil block along the first direction includes: controlling the printing material to move along the second direction, and at the same time controlling the nozzle to print the white oil block twice on the printing material according to the dam printing data.

[0016] In some embodiments, when printing the white oil block once in the dam along the first direction, the step of printing the white oil block once in the dam along the first direction or the second direction includes: controlling the return stroke of the printing material, and after the printing material returns to the origin, controlling the printing material to move along the second direction, and at the same time, controlling the nozzle to print the white oil block once on the printing material according to the dam printing data.

[0017] In some embodiments, the step of printing the white oil block twice along the first direction and curing it includes: controlling the printing material to return again, and after the printing material returns to the origin, controlling the printing material to move along the second direction, and at the same time, controlling the nozzle to print the white oil block twice on the printing material according to the dam printing data.

[0018] In some embodiments, the method further includes: baking the printing material on which the white oil block is cured.

[0019] To solve the above technical problems, in a second aspect, an embodiment of the present invention provides a digital printing device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method as described in the first aspect.

[0020] In some embodiments, the device further includes: an ultraviolet light curing lamp connected to the processor; a nozzle connected to the processor; a moving platform connected to the processor, and the moving platform carries the nozzle, or is used to carry the printing material.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: Different from the prior art, an embodiment of the present invention provides a method for printing a white oil block and a digital printing device. The printing method first prints and cures the dam of the white oil block on the printing material along the first direction, then prints the white oil block once in the dam along the first direction or the second direction, and finally prints the white oil block twice along the first direction and cures it. Among them, the first direction and the second direction are opposite directions. The printing method provided by the embodiment of the present invention can perform a certain degree of leveling and extension through the first printing without curing the white oil block before the second printing, so that the finally printed white oil block on the printing material is flat and full. Description of the Drawings

[0022] In one or more embodiments, exemplary illustrations are provided through the pictures in the corresponding attached drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements / modules and steps with the same reference numerals in the attached drawings represent similar elements / modules and steps. Unless otherwise stated, the figures in the attached drawings do not constitute a scale limitation.

[0023] Figure 1(a) is a schematic diagram of the printing effect when the nozzle is abnormal in the prior art and the ink dots printed during the second printing fall off and shift from the ink dots printed during the first printing.

[0024] Figure 1(b) is a schematic diagram of the printing effect when the nozzle is abnormal in the prior art and one of the nozzles is blocked and does not eject ink during the second printing.

[0025] Figure 1(c) is a schematic diagram of the printing effect when the nozzle is abnormal in the prior art and one of the nozzles is blocked and does not eject ink during the first printing.

[0026] Figure 2 is a schematic diagram of one application environment of the white oil fast printing method provided by the embodiment of the present invention;

[0027] Figure 3 is a schematic flowchart of a white oil block printing method provided by Embodiment 1 of the present invention;

[0028] Figure 4 is a schematic flowchart of another white oil block printing method provided by Embodiment 1 of the present invention;

[0029] Figure 5 is a printing design pattern of a white oil block on a printing material provided by Embodiment 1 of the present invention;

[0030] Figure 6 is another printing design pattern of a white oil block on a printing material provided by Embodiment 1 of the present invention;

[0031] Figure 7 is a schematic flowchart of a specific example of a white oil block printing method provided by Embodiment 2 of the present invention;

[0032] Figure 8(a) is a schematic diagram of the printing effect when the nozzle is abnormal in the printing method provided by the embodiment of the present invention and the ink dots printed during the second printing fall off and shift from the ink dots printed during the first printing.

[0033] Figure 8(b) is a schematic diagram of the printing effect when the nozzle is abnormal in the printing method provided by the embodiment of the present invention and one of the nozzles is blocked and does not eject ink during the second printing.

[0034] Figure 8(c) is a schematic diagram of the printing effect when the nozzle is abnormal in the printing method provided by the embodiment of the present invention and one of the nozzles is blocked and does not eject ink during the first printing.

[0035] Figure 9 It is a schematic flowchart of a specific example of a method for spraying white oil blocks provided in the third embodiment of the present invention;

[0036] Figure 10 It is a schematic flowchart of a specific example of a method for spraying white oil blocks provided in the fourth embodiment of the present invention;

[0037] Figure 11 It is a schematic flowchart of a specific example of a method for spraying white oil blocks provided in the fifth embodiment of the present invention;

[0038] Figure 12 It is a schematic diagram of the hardware structure of a digital spraying device provided in the sixth embodiment of the present invention;

[0039] Figure 13 It is a schematic diagram of the hardware structure of another digital spraying device provided in the sixth embodiment of the present invention. Detailed implementation manners

[0040] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made. These all belong to the protection scope of the present invention.

[0041] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from the module division in the device or the flowchart.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in this specification in the description of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0044] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Currently, the mainstream inkjet printers output at a resolution, that is, they print twice and in a one-way manner. Specifically, usually, during the first print, a 600 dpi print output is completed. During the second print, the print head returns to its original position and translates a preset distance, and then another 600 dpi print output is completed. The two prints are superimposed to complete a 1200 dpi output, and the ink needs to be cured after both the first print and the second print. In such printing, usually when an abnormality occurs in the print head, for example, one of the nozzles of the print head has an abnormal nozzle hole (the nozzle hole sprays obliquely or does not eject ink), the printing effect is as shown in FIGS. 1(a), 1(b), and 1(c), and there will be a situation where the white oil block is uneven: as shown in FIG. 1(a), when the ink dots printed during the second print fall on the ink dots printed during the first print and are offset, a thinner and lighter white oil line will be formed at A, the flatness of the white oil block is poor, and obvious light and dark lines can be seen with the naked eye, and the effect is poor; as shown in FIG. 1(b), when one of the nozzle holes is blocked and does not eject ink during the second print, the corresponding B area of the white oil block will be thinner and lighter, the flatness of the white oil block is poor, and obvious light and dark lines can be seen with the naked eye, and the effect is poor; as shown in FIG. 1(c), when one of the nozzle holes is blocked and does not eject ink during the first print, the corresponding C area of the white oil block will be thinner and lighter, the flatness of the white oil block is poor, and obvious light and dark lines can be seen with the naked eye, and the effect is poor. The above-mentioned color differences are easily discovered by the naked eye. When the above situation occurs, the area with a lighter color is easily recognized by the naked eye. Due to the differences in the surface tension and flow leveling property of the ink, a more serious situation is the appearance of an obvious crack.

[0046] To solve the problems of poor flatness of the white oil block, visible light and dark lines to the naked eye, and poor effect, the embodiment of the present invention provides a method for spraying the white oil block. Figure 2 It is a schematic diagram of one application environment of the method for spraying the white oil block provided by the embodiment of the present invention. Among them, this application environment includes: a print head 10, an ultraviolet light curing lamp 20, and a moving platform 30. It can be understood that in some embodiments, the ultraviolet light curing lamp 20 can also be in other curing modes as long as it plays the corresponding curing role, and details are not described one by one here.

[0047] The nozzle 10 can be a digital inkjet nozzle of an inkjet printer capable of achieving resolution output. It is provided with a plurality of nozzles and can perform contactless inkjet printing onto the printing material M on demand, realizing the graphical presentation of ink on the printing material M. The nozzle 10 has a fixed physical resolution, and the printing resolution is a multiple of the resolution of the nozzle 10. For example, when the resolution of the nozzle 10 is 600 dpi, the printing resolution of the entire printing device is a multiple of 600 dpi, such as 600 dpi, 1200 dpi, 1800 dpi, etc. As shown in FIG. 1 above, when printing needs to be performed twice, the first printing is completed at 600 dpi, and the second printing is completed at another 600 dpi. The two printings are superimposed to complete the output of 1200 dpi. Specifically, the specific model of the nozzle 10, the number of nozzle holes, etc. can be selected according to actual needs.

[0048] The ultraviolet light curing lamp 20, i.e., the UV light curing lamp, is a lamp that can emit ultraviolet light to cure the white oil block on the printing material after receiving the ultraviolet light. It is made of high-quality pure quartz tubing. The ultraviolet light curing lamp 20 can be installed behind the printing direction of the nozzle 10, closed when curing is not required, and turned on when curing is required to immediately cure the ink dots after the nozzle 10 has completed inkjet printing. Specifically, the power and installation method of the ultraviolet light curing lamp 20 can be selected according to actual needs.

[0049] In Figure 2 the illustrated example, the moving platform 30 is a device that can fix the printing material M and move the printing material M. It can control the printing material M to move relative to the nozzle 10 at a constant speed, so that the ink ejected by the nozzle 10 can be evenly printed on the printing material M. Among them, the printing material M can be a printed circuit board PCB.

[0050] It should be noted that Figure 2 taking the moving platform 30 as an example that can move the printing material and control the movement of the printing material relative to the nozzle 10, the moving platform 30 can move left as shown by the Figure 2 arrow. At the same time, the nozzle 10 prints a dam, and the ultraviolet light curing lamp 20 is turned on and cures the dam; after reaching the end, the moving platform 30 moves in the reverse direction (moves to the right), and at the same time, the nozzle 10 prints a white oil block once, and the ultraviolet light curing lamp 20 is turned off; after reaching the end again, the moving platform 30 moves left again in the direction of the arrow, and at the same time, the nozzle 10 prints the white oil block twice, and the ultraviolet light curing lamp 20 is turned on and cures the white oil block.

[0051] In some other embodiments, the motion platform 30 may also be connected to the nozzle 10 or carry the nozzle 10 to control the relative movement of the nozzle 10 with respect to the printing material. Of course, the motion platform 30 may also be provided on both the nozzle 10 and the printing material. In actual application scenarios, the specific structure of the motion platform 30 and the object that can be controlled to move can be selected and set according to actual needs.

[0052] Specifically, with reference to the accompanying drawings, embodiments of the present invention will be further described below.

[0053] Embodiment 1

[0054] An embodiment of the present invention provides a method for printing white oil blocks. This printing method can be applied to the digital printing equipment as described in the above application scenarios and Figure 2 as shown. Please refer to Figure 3 , which shows a method for printing white oil blocks provided by an embodiment of the present invention. The method for printing white oil blocks includes but is not limited to the following steps:

[0055] Step S10: Print and cure the dam of the white oil block on the printing material in the first direction;

[0056] In the embodiment of the present invention, first, it is necessary to print the dam for spraying the white oil block in the first direction to determine the edge of the white oil block and ensure that the white oil block is sprayed within the preset position range. At the same time, it is also necessary to cure the dam to avoid bleeding when spraying the white oil block directly without curing, resulting in the white oil block exceeding the preset boundary range and the edge being unclear. Then, the white oil block is sprayed within the dam to achieve the final printing of the white oil block.

[0057] In some embodiments, please refer to Figure 4 , which shows another method for printing white oil blocks provided by an embodiment of the present invention. Before printing and curing the dam of the white oil block on the printing material in the first direction, the method further includes:

[0058] Step S41: Obtain the printing design pattern of the white oil block;

[0059] In the embodiment of the present invention, please also refer to Figure 5 , which shows a printing design pattern of a white oil block on a printing material. As Figure 5 shown, the user can design and / or import the printing design pattern through design software or the like, so that the digital printing equipment can obtain the printing task and execute the printing task to achieve printing. The printing design pattern includes information such as the size of the printing material 1, and also includes information such as the position, shape, and size of the white oil block 5 to be printed on the printing material 1, as well as information such as the position, shape, and size of the dam 4 of the white oil block 5.

[0060] Step S42: Identify the white oil blocks according to the printing design pattern and generate the printing data for the white oil blocks;

[0061] After importing the printing design pattern, the digital inkjet printing device can identify the white oil blocks in the printing design pattern and generate the printing data for the white oil blocks. The printing data for the white oil blocks is the data required when the digital inkjet printing device needs to print the white oil blocks, and it includes data information such as printing positions and printing pixels. In the embodiments of the present invention, since the white oil blocks need to be formed by secondary printing, therefore, the printing data for the white oil blocks should at least contain the data required for two printings, and can be specifically designed according to actual needs.

[0062] Step S43: Identify the area edges of the white oil blocks and generate the dam-building printing data for the white oil blocks.

[0063] Furthermore, after identifying the white oil blocks, it is also necessary to identify the area edge information of the white oil blocks and form the dam-building printing data according to the edges, that is Figure 5 the data information of dam 4. The data information of dam 4 should at least include the position, width, size, etc. of the dam 4, and can be specifically designed according to actual needs.

[0064] Step S20: Print the white oil blocks once in the dam along the first direction or the second direction;

[0065] Among them, the first direction and the second direction are opposite directions. For example, when the first direction is the direction from left to right along the horizontal direction of the printing design pattern as shown above Figure 5 the second direction is the direction from right to left along the horizontal direction; when the first direction is the direction from top to bottom along the vertical direction of the printing design pattern as shown above Figure 5 the second direction is the direction from bottom to top along the vertical direction, and specifically, it can be set according to actual needs.

[0066] Step S30: Print the white oil blocks a second time along the first direction and cure them;

[0067] After the nozzle moves in the reverse direction relative to the printing material and completes the first printing of the white oil blocks, it returns to near the origin where the dam printing starts. At this time, the nozzle can be controlled to print the white oil blocks a second time along the first direction and cure them. Preferably, the printing pixels of the white oil blocks in the first printing data and the printing data for the white oil blocks in the second printing are the same. It should be noted that when printing the white oil blocks a second time, the positions of the ink dots printed should be offset from the positions of the ink dots in the first printing, so as to achieve the superimposed output of the resolution. The "first time" mentioned above is the first time of the first printing, and the "second time" is the second time of the first printing.

[0068] In some embodiments, please refer toFigure 6 , which shows another method for spraying white oil blocks provided by an embodiment of the present invention. The method further includes:

[0069] Step S50: Bake the printing material that has completed the curing of the white oil block.

[0070] Furthermore, for the printing material that has completed the spraying of the white oil block, the printing material, such as a printed circuit board, also needs to be baked. For example, the baking temperature can be set at 150 degrees, and the baking time can be set to 60 minutes. Specifically, it can be set according to actual needs and does not need to be restricted by the limitations of the embodiments of the present invention.

[0071] Embodiment Two

[0072] An embodiment of the present invention provides a specific example of the method for spraying white oil blocks based on the method described in Embodiment One above. Please also refer to Figure 7 , which shows the flow of a specific example of the method for spraying white oil blocks provided by an embodiment of the present invention. The embodiment of the present invention uses a method of controlling the movement of the nozzle to achieve dam building and the spraying of white oil blocks. Specifically, the method includes but is not limited to the following steps:

[0073] Step S11a: Control the nozzle to move in the first direction, and at the same time, control the nozzle to spray the dam on the printing material according to the dam spraying data;

[0074] In the embodiment of the present invention, by controlling the movement of the nozzle, relative movement with respect to the printing material can be achieved, and the dam is sprayed while moving, so as to achieve spraying the dam of the white oil block on the printing material along the first direction. Specifically, a motion platform for controlling the movement of the nozzle can be selected and designed according to actual needs.

[0075] Step S12a: Dry and cure the dam by an ultraviolet curing lamp.

[0076] After spraying the dam, it is also necessary to dry and cure the dam by an ultraviolet curing lamp. Preferably, the curing lamp can be integrated with the nozzle and is arranged behind the printing direction of the nozzle to immediately dry and cure the ink dots after the nozzle sprays ink.

[0077] Step S21a: Control the nozzle to move in the second direction, and at the same time, control the nozzle to spray the white oil block on the printing material at one time according to the white oil block spraying data;

[0078] In an embodiment of the present invention, after the nozzle has printed the dam, the nozzle is controlled to return along a direction opposite to the first direction, that is, the second direction, and a white oil block is printed once during the return process. Among them, the nozzle can be controlled to perform the return work by controlling the movement of the nozzle in the second direction, so as to realize printing the white oil block once in the dam along the second direction. Specifically, the power source of the movement of the nozzle can be set according to actual needs.

[0079] Step S31a: Control the nozzle to move in the first direction, and at the same time control the nozzle to print the white oil block on the printing material for the second time according to the white oil block printing data;

[0080] In an embodiment of the present invention, after the nozzle moves in the reverse direction relative to the printing material and completes the first printing of the white oil block, it returns to near the origin where the dam printing starts. At this time, the nozzle can be controlled to move in the first direction relative to the printing material to print the white oil block for the second time, so as to realize printing the white oil block for the second time along the first direction and curing it. Among them, the printing pixels of the white oil block data printed for the first time and the white oil block printing data printed for the second time are the same. When printing the white oil block for the second time, the positions of the ink dots printed should be offset from the positions of the ink dots during the first printing, so as to realize the superimposed output of the resolution.

[0081] Step S32a: Dry and cure the white oil block with an ultraviolet light curing lamp.

[0082] After printing the white oil block, it is also necessary to dry and cure the white oil block with an ultraviolet curing lamp. Preferably, the curing lamp can be installed integrally with the nozzle and is arranged after the printing direction of the nozzle, and immediately dries and cures the ink dots after the nozzle sprays ink.

[0083] The white oil block printed by the printing method provided by the embodiment of the present invention, when encountering the abnormal situation of the nozzle as described in the above application scenario, compared with Fig. 1(a), Fig. 1(b), and Fig. 1(c), please refer to Fig. 8(a), Fig. 8(b), and Fig. 8(c) for its printing effect. It is not difficult to see that since the ink dots are not immediately cured on the printing material during the first printing, the ink dots printed during the first printing can be leveled and extended to a certain extent during the second printing (the ink dots become thinner compared to being directly cured), and due to the existence of the dam 4, it can ensure that the ink dots printed during the first printing flow out of the white oil block area. When the ink dots printed during the second printing adhere to the ink dots printed during the first printing, the two printed ink dots will also fuse and level to a certain extent before being cured. The embodiment of the present invention uses the dam 4 to build a fence to stabilize the ink within the printing area required for the white oil block, achieving the purpose of high-precision positioning and no ink overflow. Then, by utilizing the physical property of the ink itself to level and fuse when not cured, when the nozzle orifice is abnormal, the ink reaches a flat surface through leveling and fusing (the height difference on the surface becomes very small and cannot be seen by the naked eye) and then is cured, meeting the requirements for the flatness and fullness of the white oil block.

[0084] Embodiment III

[0085] The embodiment of the present invention provides a specific example of a printing method for a white oil block based on the printing method of the white oil block described in the above Embodiment I. Please refer to Figure 9 which shows the flow of a specific example of a printing method for a white oil block provided by the embodiment of the present invention. Different from the above Embodiment II, the embodiment of the present invention realizes the dam building and the printing of the white oil block by controlling the movement of the printing material. Specifically, the method includes but is not limited to the following steps:

[0086] Step S11b: Control the printing material to move in the second direction, and at the same time, control the nozzle to print the dam on the printing material according to the dam printing data.

[0087] In the embodiment of the present invention, by controlling the movement of the printing material, printing can be achieved relative to the movement of the nozzle. While moving, control the nozzle to print the dam, so as to realize the dam building for printing the white oil block on the printing material along the first direction. Specifically, a motion platform for controlling the movement of the printing material can be selected and designed according to actual needs.

[0088] Step S12b: Dry and cure the dam with an ultraviolet curing lamp.

[0089] After printing the dam, it is also necessary to dry and cure the dam with an ultraviolet curing lamp. Preferably, the curing lamp can be integrated with the nozzle and is arranged after the printing direction of the nozzle to immediately dry and cure the ink dots after the nozzle sprays ink.

[0090] Step S21b: Control the printing material to move in the first direction, and at the same time, control the nozzle to spray the white oil block on the printing material once according to the dam printing data.

[0091] In an embodiment of the present invention, after spraying the dam, control the printing material to return and move in a direction opposite to the second direction, that is, the first direction, and spray the white oil block once during the return process. The return work of the printing material can be controlled by controlling the printing material to move in the first direction, so as to realize spraying the white oil block once in the dam along the second direction. Specifically, the power source for the movement of the printing material can be set according to actual needs.

[0092] Step S31b: Control the printing material to move in the second direction, and at the same time, control the nozzle to spray the white oil block on the printing material twice according to the dam printing data.

[0093] In an embodiment of the present invention, after the first spraying is completed, the printing material returns to a position near the origin where the dam printing starts relative to the nozzle. At this time, the printing material can be controlled to move relative to the nozzle in the second direction, and at the same time, control the nozzle to spray the white oil block twice to realize spraying the white oil block twice along the first direction and curing it. Among them, the printing pixels of the white oil block data in the first spraying and the printing data of the white oil block in the second spraying are the same. When spraying the white oil block for the second time, the position of the ink dots sprayed should be offset from the position of the ink dots during the first spraying, so as to realize the superposition output of the resolution.

[0094] Step S32b: Dry and cure the white oil block with an ultraviolet light curing lamp.

[0095] After spraying the white oil block, it is also necessary to dry and cure the white oil block with an ultraviolet curing lamp. Preferably, the curing lamp can be integrated with the nozzle and is arranged behind the printing direction of the nozzle to immediately dry and cure the ink dots after the nozzle sprays ink.

[0096] Similarly, for the white oil block sprayed by the spraying method provided by the embodiment of the present invention, when the nozzle encounters an abnormality as described in the above application scenario, compared with FIGS. 1(a), 1(b), and 1(c), the printing effect can also be seen in FIGS. 8(a), 8(b), and 8(c) above. It is not difficult to see that since the ink dots are not immediately cured on the printing material during the first spraying, the ink dots sprayed during the first spraying can be leveled and extended to a certain extent during the second spraying (the ink dots become thinner compared to being directly cured), making the finally printed white oil block on the printing material flat and full. And because the dam 4 is used to establish a fence, the ink can be stabilized within the printing area required for the white oil block, achieving the purpose of high-precision positioning and no ink overflow.

[0097] Example 4

[0098] The embodiment of the present invention provides a specific example of a method for spraying white oil blocks based on the method described in Embodiment 1 above. Please refer to Figure 10 simultaneously, which shows the flow of a specific example of a method for spraying white oil blocks provided by the embodiment of the present invention. Similar to the above Embodiment 2, the embodiment of the present invention still adopts the method of controlling the movement of the nozzle to realize the dam building and the spraying of white oil blocks. Different from the above Embodiment 2, after each spraying is completed, the nozzle in the embodiment of the present invention will return, and after returning to the spraying origin, the next spraying will be carried out. Specifically, the method includes but is not limited to the following steps:

[0099] Step S11c: Control the nozzle to move in the first direction, and at the same time control the nozzle to spray the dam on the printing material according to the dam spraying data;

[0100] In the embodiment of the present invention, by controlling the movement of the nozzle, the movement relative to the printing material can be realized, and the dam is sprayed while moving, so as to realize the dam building of spraying white oil blocks on the printing material along the first direction. Specifically, the movement platform for controlling the movement of the nozzle can be selected and designed according to actual needs.

[0101] Step S12c: Dry and cure the dam by an ultraviolet curing lamp.

[0102] After spraying the dam, it is also necessary to dry and cure the dam by an ultraviolet curing lamp. Preferably, the curing lamp can be installed integrally with the nozzle and is arranged behind the printing direction of the nozzle, and the ink dots are dried and cured immediately after the nozzle sprays ink.

[0103] Step S21c: Control the nozzle to return, and after the nozzle returns to the origin, control the nozzle to move in the first direction, and at the same time control the nozzle to spray the white oil block on the printing material once according to the white oil block spraying data;

[0104] In the embodiment of the present invention, after spraying the dam, the nozzle is controlled to return. After returning to the spraying origin, the nozzle is controlled to move along the first direction again and spray the white oil block once, so as to realize spraying the white oil block once in the dam along the first direction. Among them, the nozzle can be controlled to perform the return work by controlling the nozzle to move in the second direction; the origin can be the position where the nozzle starts to print the dam, or the default position set by the system before printing the dam, which can be specifically selected according to actual needs.

[0105] Step S31c: Control the nozzle to return again. After the nozzle returns to the origin, control the nozzle to move in the first direction, and at the same time, control the nozzle to secondarily print the white oil block on the printing material according to the white oil block printing data.

[0106] In the embodiment of the present invention, after the nozzle completes the primary printing of the white oil block, it returns again to the vicinity of the origin where the dam building starts. Then, control the nozzle to move relative to the printing material in the first direction again to secondarily print the white oil block, so as to realize the secondary printing of the white oil block along the first direction and curing. Among them, the printing pixels of the white oil block data in the primary printing and the white oil block printing data in the secondary printing are the same. The positions of the ink dots during the secondary printing of the white oil block should be offset from the positions of the ink dots during the primary printing, so as to realize the superimposed output of the resolution.

[0107] Step S32c: Dry and cure the white oil block through an ultraviolet light curing lamp.

[0108] After printing the white oil block, it is also necessary to dry and cure the white oil block through an ultraviolet curing lamp. Preferably, the curing lamp can be installed integrally with the nozzle and is arranged behind the printing direction of the nozzle to immediately dry and cure the ink dots after the nozzle jets ink.

[0109] Similarly, for the white oil block printed by the printing method provided by the embodiment of the present invention, when the nozzle encounters an abnormality as described in the above application scenario, compared with FIGS. 1(a), 1(b), and 1(c), the printing effect can also be seen in FIGS. 8(a), 8(b), and 8(c) above. It is not difficult to see that since the ink dots are not immediately cured on the printing material during the primary printing, the ink dots printed in the primary printing can be leveled and extended to a certain extent during the secondary printing (the ink dots become thinner compared to being directly cured), making the finally printed white oil block on the printing material flat and full. And since the dam 4 is used to establish a fence, the ink can be stabilized within the printing area required for the white oil block, achieving the purpose of high-precision positioning and no ink overflow.

[0110] Embodiment Five

[0111] The embodiment of the present invention provides a specific example of a printing method of a white oil block based on the printing method of the white oil block described in the above Embodiment One. Please refer to Figure 11 , which shows the flow of a specific example of a printing method of a white oil block provided by the embodiment of the present invention. The same as the above Embodiment Three, the embodiment of the present invention still adopts the method of controlling the movement of the printing material to realize the dam building and the printing of the white oil block. Different from the above Embodiment Three, the printing material will return after each printing is completed and return to the origin for the next printing. Specifically, the method includes but is not limited to the following steps:

[0112] Step S11d: Control the printing material to move in the second direction, and at the same time, control the nozzle to spray the dam on the printing material according to the dam spraying data.

[0113] In the embodiment of the present invention, by controlling the movement of the printing material, spraying can be achieved relative to the movement of the nozzle. While moving, the nozzle is controlled to spray the dam, so as to realize spraying the dam of the white oil block on the printing material along the first direction. Specifically, the movement platform for controlling the movement of the printing material can be selected and designed according to actual needs.

[0114] Step S12d: Dry and cure the dam by an ultraviolet curing lamp.

[0115] After spraying the dam, it is also necessary to dry and cure the dam by an ultraviolet curing lamp. Preferably, the curing lamp can be installed integrally with the nozzle and is arranged after the printing direction of the nozzle, and immediately dries and cures the ink dots after the nozzle sprays ink.

[0116] Step S21d: Control the printing material to return, and after the printing material returns to the origin, control the printing material to move in the second direction, and at the same time, control the nozzle to spray the white oil block on the printing material once according to the dam spraying data.

[0117] In the embodiment of the present invention, after spraying the dam, control the printing material to return. After returning to the origin of spraying, control the printing material to move along the second direction again, and control the nozzle to spray the white oil block once in the dam, so as to realize spraying the white oil block once in the dam along the first direction. Among them, the return work of the printing material can be controlled by controlling the printing material to move in the first direction; the origin can be the position where the printing material starts to print the dam, or the default position set by the system before printing the dam, which can be specifically selected according to actual needs.

[0118] Step S31d: Control the printing material to return again, and after the printing material returns to the origin, control the printing material to move in the second direction, and at the same time, control the nozzle to spray the white oil block on the printing material twice according to the dam spraying data.

[0119] In an embodiment of the present invention, after one-time printing is completed, the printing material is controlled to return again, back to near the origin where printing the dam starts. Then, the printing material is controlled again to move relative to the print head in the second direction, and at the same time, the print head is controlled to perform secondary printing of the white oil block, so as to achieve secondary printing of the white oil block along the first direction and curing. Wherein, the printing pixels of the white oil block data of the one-time printing and the printing data of the white oil block of the secondary printing are the same, and the positions of the ink dots during the secondary printing of the white oil block should be offset from the positions of the ink dots during the one-time printing, so as to achieve superposition output of the resolution.

[0120] Step S32d: Dry and cure the white oil block through an ultraviolet light curing lamp.

[0121] After printing the white oil block, it is also necessary to dry and cure the white oil block through an ultraviolet curing lamp. Preferably, the curing lamp can be integrated with the print head and is arranged after the printing direction of the print head, and immediately dries and cures the ink dots after the print head sprays ink.

[0122] Similarly, for the white oil block printed by the printing method provided by the embodiment of the present invention, when the print head encounters an abnormality as described in the above application scenario, compared with FIGS. 1(a), 1(b), and 1(c), the printing effect can also be seen in FIGS. 8(a), 8(b), and 8(c) above. It is not difficult to see that since the ink dots are not immediately cured on the printing material during the one-time printing, the ink dots of the one-time printing can be leveled and extended to a certain extent during the secondary printing (the ink dots become thinner compared to being directly cured), making the finally printed white oil block on the printing material flat and full. And because the dam 4 is used to establish a fence, the ink can be stabilized within the printing area required for the white oil block, achieving the purpose of high-precision positioning and no ink overflow.

[0123] Embodiment Six

[0124] The embodiment of the present invention also provides a digital printing device. Please refer to Figure 12 , which shows the hardware structure of a digital printing device capable of executing Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 11 the printing method of the white oil block. The digital printing device 100 may be Figure 2 the digital printing device shown.

[0125] The digital printing device 100 includes: at least one processor 11; and a memory 12 communicatively connected to the at least one processor 11, Figure 12Take a processor 11 as an example. The memory 12 stores instructions executable by the at least one processor 11. The instructions are executed by the at least one processor 11 to enable the at least one processor 11 to execute the above-mentioned Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 11 printing method of the white oil block. The processor 11 and the memory 12 can be connected through a bus or other means. Figure 12 Take the connection through the bus as an example.

[0126] In some embodiments, please refer to Figure 13 , which shows the hardware structure of another digital printing device provided by an embodiment of the present invention. The digital printing device 100 further includes: a nozzle 10, which is connected to the processor 11; an ultraviolet light curing lamp 20, which is connected to the processor 11; a moving platform 30, which is connected to the processor 11, and the moving platform 30 carries the nozzle 10, or is used to carry printing materials.

[0127] As a non-volatile computer-readable storage medium, the memory 12 can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions / modules corresponding to the printing method of the white oil block in the embodiments of the present application. By running the non-volatile software programs, instructions, and modules stored in the memory 12, the processor 11 executes various functional applications and data processing of the server, that is, implements the printing method of the white oil block in the above method embodiments.

[0128] The memory 12 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the white oil block printing device, etc. In addition, the memory 12 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 12 may optionally include a memory remotely set relative to the processor 11, and these remote memories can be connected to the white oil block printing device through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations.

[0129] The one or more modules are stored in the memory 12 and, when executed by the one or more processors 11, execute the printing method of the white oil block in any of the above method embodiments. For example, execute the Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 11 method steps to implement the functions of each module and each unit.

[0130] The above product can execute the method provided by the embodiments of the present application, and has the corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in this embodiment, reference may be made to the method provided by the embodiments of the present application.

[0131] The embodiments of the present application also provide a non-volatile computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are executed by one or more processors. For example, execute the Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 11 method steps as described above to implement the functions of each module.

[0132] The embodiments of the present application also provide a computer program product, including a computing program stored on a non-volatile computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the printing method of the white oil block in any of the above method embodiments. For example, execute the Figures 3 to 4 , Figures 6 to 7 , Figures 9 to 11 method steps as described above to implement the functions of each module.

[0133] In the embodiments of the present invention, a printing method of a white oil block and a digital printing device are provided. The printing method first sprays and cures a dam of the white oil block on a printing material along a first direction, and then sprays the white oil block once in the dam along the first direction or a second direction. Finally, the white oil block is sprayed twice along the first direction and cured. Wherein, the first direction and the second direction are opposite directions. The printing method provided by the embodiments of the present invention can perform a certain degree of leveling and extension through the first spraying of the white oil block without curing before the second spraying, so that the finally printed white oil block on the printing material is flat and full.

[0134] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] Through the description of the above embodiments, those of ordinary skill in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Those of ordinary skill in the art can understand that all or part of the processes in the above-described method for implementing the embodiments can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0136] 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; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for printing white oil blocks, characterized in that, Including: Dam building and curing by spraying white oil blocks on the printing material along the first direction; Spraying white oil blocks once inside the dam along the first direction or the second direction; Spraying the white oil blocks a second time along the first direction and curing; wherein, when spraying the white oil blocks a second time, the positions of the ink dots sprayed are offset from the positions of the ink dots during the first spraying to perform superposition output of the resolution; Wherein, the first direction and the second direction are opposite directions, and the white oil blocks are not cured during the first spraying.

2. The inkjet printing method according to claim 1, wherein Before dam building and curing by spraying white oil blocks on the printing material along the first direction, the method further includes: Obtaining the printing design pattern of the white oil blocks; Identifying the white oil blocks according to the printing design pattern and generating white oil block spraying data; Identifying the regional edge of the white oil blocks and generating dam building spraying data for the white oil blocks.

3. The inkjet printing method according to claim 2, wherein The dam building and curing by spraying white oil blocks on the printing material along the first direction includes: Controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to spray the dam on the printing material according to the dam building spraying data; Drying and curing the dam by an ultraviolet curing lamp.

4. The inkjet printing method according to claim 1, wherein When spraying white oil blocks once inside the dam along the second direction, the spraying white oil blocks once inside the dam along the first direction or the second direction includes: Controlling the nozzle to move along the second direction, and at the same time controlling the nozzle to spray the white oil blocks once on the printing material according to the white oil block spraying data.

5. The inkjet printing method according to claim 1, wherein, The spraying the white oil blocks a second time along the first direction and curing includes: Controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to spray the white oil blocks a second time on the printing material according to the white oil block spraying data; Drying and curing the white oil blocks by an ultraviolet light curing lamp.

6. The inkjet printing method according to claim 1, characterized in that, When spraying white oil blocks once inside the dam along the first direction, the spraying white oil blocks once inside the dam along the first direction or the second direction includes: Controlling the nozzle to return, and after the nozzle returns to the origin, controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to spray the white oil blocks once on the printing material according to the white oil block spraying data.

7. The inkjet printing method according to claim 6, wherein The spraying the white oil blocks a second time along the first direction and curing includes: Controlling the nozzle to return again, and after the nozzle returns to the origin, controlling the nozzle to move along the first direction, and at the same time controlling the nozzle to spray the white oil blocks a second time on the printing material according to the white oil block spraying data; Drying and curing the white oil blocks by an ultraviolet light curing lamp.

8. The inkjet printing method according to claim 2, characterized in that, The dam building and curing by spraying white oil blocks on the printing material along the first direction includes: Controlling the printing material to move along the second direction, and at the same time controlling the nozzle to spray the dam on the printing material according to the dam building spraying data; Drying and curing the dam by an ultraviolet curing lamp.

9. The inkjet printing method according to claim 8, wherein When spraying white oil blocks once inside the dam along the second direction, the spraying white oil blocks once inside the dam along the first direction or the second direction includes: Controlling the printing material to move along the first direction, and at the same time controlling the nozzle to spray the white oil blocks once on the printing material according to the dam building spraying data.

10. The inkjet printing method according to claim 8, wherein The spraying the white oil blocks a second time along the first direction and curing includes: Control the printing material to move in the second direction, and at the same time control the nozzle to secondarily print the white oil block on the printing material according to the dam printing data.

11. The inkjet printing method according to claim 8, characterized in that, When primarily printing the white oil block in the dam along the first direction, the primary printing of the white oil block in the dam along the first direction or the second direction includes: Control the printing material to return, and after the printing material returns to the origin, control the printing material to move in the second direction, and at the same time control the nozzle to primarily print the white oil block on the printing material according to the dam printing data.

12. The inkjet printing method according to claim 8, wherein, The secondary printing and curing of the white oil block along the first direction includes: Control the printing material to return again, and after the printing material returns to the origin, control the printing material to move in the second direction, and at the same time control the nozzle to secondarily print the white oil block on the printing material according to the dam printing data.

13. The inkjet printing method according to any one of claims 1-12, characterized in that, The method further includes: Bake the printing material on which the white oil block is cured.

14. A digital inkjet printing device, characterized in that, Includes: At least one processor; And, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1-13.

15. The digital inkjet printing device according to claim 14, wherein The device further includes: A nozzle, which is connected to the processor; An ultraviolet light curing lamp, which is connected to the processor; A motion platform, which is connected to the processor, And, the motion platform carries the nozzle, or is used to carry the printing material.

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