An onepass printing apparatus and a control method thereof

Abstract

The application belongs to the field of inkjet printing technology, solves the technical problems of large length of printing equipment, incomplete ink curing and poor printing quality in the prior art, and provides an Onepass printing equipment and a control method thereof, the Onepass printing equipment comprising a nozzle module and a UV lamp module arranged downstream of the nozzle module relative to a conveying direction and spaced from the nozzle module, the nozzle module comprising a plurality of nozzles arranged in a vertical direction perpendicular to the conveying direction of the printing medium and used for jetting ink on the printing medium; the UV lamp module comprising a plurality of rows of UV lamps spaced from each other, parallel to the vertical direction and used for photocuring ink. The Onepass printing equipment and the control method thereof have the advantages of helping to reduce the length of the printing equipment, complete ink curing and ensuring excellent printing quality.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing technology, and more particularly to a Onepass printing device and its control method. Background Technology

[0002] Inkjet printing technology refers to the technology of ejecting ink droplets from a printhead onto a printing medium to obtain images or text. With technological advancements and improved living standards, people are increasingly demanding higher speeds and higher quality printed images, often requiring high-speed, high-precision printing. High-precision printing is currently achieved through alternating reciprocating motion of the printhead along the X-axis and forward movement along the Y-axis, driven by the printer's carriage; while high-speed printing is currently achieved using equipment where the printhead remains stationary while the printing medium continuously moves forward.

[0003] To meet people's pursuit of speed and quality in printing images, UV inks are increasingly being used to replace traditional solvent-based inks. UV inks can dry and cure rapidly within seconds under ultraviolet light, resulting in cleaner prints with saturated colors, exquisite images, and high gloss. They are particularly suitable for high-speed printing and have good adsorption and mechanical properties on various printing substrates.

[0004] In high-precision reciprocating printers, the UV lamps are fixed on both sides of the carriage and move with it, curing as they print. They can be repeatedly irradiated during reciprocating scanning within the carriage's area, resulting in excellent curing. In high-speed Onepass printers, the UV lamps are fixed behind the printhead and cure immediately after printing. However, because Onepass printers print so quickly, curing immediately after printing can lead to insufficient leveling and incomplete curing. To address this, some manufacturers install a row of UV lamps with a larger gap between them and the printhead in the media transport direction. However, this increases the length of the printer, making it bulkier, and still results in incomplete curing and poor print quality.

[0005] Therefore, there is an urgent need to provide a Onepass printing device and its control method that helps reduce the length of the printing device, ensure complete ink curing, and guarantee excellent print quality. Summary of the Invention

[0006] To address the shortcomings of the prior art and achieve one objective, this invention provides a Onepass printing device, comprising a printhead module and a UV lamp module located downstream of the printhead module and spaced apart from it relative to the transport direction. The printhead module includes a plurality of printheads arranged in a vertical direction perpendicular to the transport direction of the printing medium for ejecting ink onto the printing medium; the UV lamp module includes multiple rows of UV lamps spaced apart and parallel to the vertical direction for photocuring ink.

[0007] Furthermore, along the conveying direction, the UV lamp power values ​​of at least some of the multi-row UV lamps are set to increase row by row.

[0008] Furthermore, the printing speed at which the printing media is conveyed relative to the printhead to accept inkjet printing is set to V. S S corresponds to the movement speed of different printing media, and F is set as the UV curing ease characteristic of the ink. L Furthermore, L corresponds to different ink characteristics, and the distances between each row of UV lamps and the printhead module along the conveying direction are respectively set to R from near to far. i If i = 1...N, N ≥ 4 and is a positive integer, then the corresponding R-th... i The UV lamp power of the UV lamp array is set to According to different V S and F L Control the total number of rows of UV lamps in operation and the initial sequence number, and V S The faster you go, the more rows you can open. L The more difficult the problem, the larger the initial sort number. When the total number of rows is 1 and the initial sort number is the Kth row, where K ∈ i and K is a positive integer, then the corresponding UV lamp power... Open the R K When arranging UV lamps, if the total number of rows turned on is greater than 1 and the initial sorting number is M, where M ∈ i and M is a positive integer, then the corresponding R-th row is turned on. M R M+1 ...R N A row of UV lamps, and the UV lamp power corresponding to each row of turned-on UV lamps. The numerical values ​​are set to increase sequentially from row to row.

[0009] Furthermore, if the different moving speeds corresponding to S are set as low speed, medium speed, high speed, and ultra-high speed, then the printing speed V... S Correspondingly, V 低 V 中 V 高 and V 超 If ink property L is categorized into poor flowability, normal flowability, and good flowability based on the difficulty of UV curing, from most difficult to easiest, then the ink UV curing difficulty property F is... L Correspondingly, they are F 差F 正 and F 好 .

[0010] Furthermore, when V S For V 低 F L For F 差 When, K is set to N, and the Rth... N UV lamps are arranged according to their UV lamp power. On; when V S Let V be the value of V. 低 F L Let it be F 正 When M is (N-1) / 2+1 or N / 2, (N-1) / 2+1 corresponds to when N is a positive odd number, and N / 2 corresponds to when N is a positive even number. Furthermore, the Rth... N UV lamps are arranged according to their UV lamp power. On; when V S Let V be the value of V. 低 F L Let it be F 好 When, then M is set to N, and the Rth... N UV lamps are arranged according to their UV lamp power. Enabled; and satisfying the following conditions:

[0011] Furthermore, multiple nozzles are arranged in parallel rows from the first row to the Wth row, with 2 ≤ W ≤ 4 and W being a positive integer, and for the Rth row that is turned on for pre-curing... i The UV lamps used are specifically designed for the ink ejected from the printheads in rows one through W. Decrease step by step.

[0012] Furthermore, the low speed, medium speed, high speed and ultra-high speed are set to 0-30, 30-80, 80-100 and 100-140 (m / min) respectively, and the UV lamp power value of each row of UV lamps is adjustable between 0% and 100% of the maximum UV lamp power value.

[0013] To achieve another objective of the present invention, the present invention also provides a control method for a Onepass printing device, which is used to control any of the above-mentioned printing devices. The control method includes: acquiring V S and F L Determine the total number of rows of UV lamps to be turned on and the initial sequence number; if the determined total number of rows to be turned on is 1 and the initial sequence number is row K, then control the UV lamp power. Open the R K Arrange UV lamps; if the determined total number of rows to be turned on is greater than 1 and the initial sequence number is M, then control the power of the UV lamps to increase sequentially from row to row. To correspondingly activate the RthM R M+1 ...R N A row of UV lamps.

[0014] Furthermore, obtain V S and F L The steps also include: obtaining the different moving speeds corresponding to S and setting them as low speed, medium speed, high speed, and ultra-high speed, thereby determining the printing speed V. S Correspondingly, V 低 V 中 V 高 and V 超 The ink characteristic L was obtained by classifying the ink into poor flowability, normal flowability, and good flowability according to the difficulty of UV curing, from most difficult to easiest. This was used to determine the ink's UV curing difficulty characteristic F. L Correspondingly, they are F 差 F 正 and F 好 .

[0015] Furthermore, the control method also includes: acquiring V respectively S and F L For V 低 and F 差 Then, determine that the total number of rows to be turned on is 1 and the initial sequence number is N, and then control the UV lamp power. Open the R N UV lamps;

[0016] Obtain V respectively S and F L For V 低 and F 正 Then, determine the total number of rows to be turned on as (N-1) / 2+1 or N / 2, and the initial sequence number as M. (N-1) / 2+1 corresponds to N being a positive odd number, and N / 2 corresponds to N being a positive even number. Control the UV lamp power to increase row by row. Correspondingly activate the Rth M R M+1 ...R N A row of UV lamps; and the control meets the following requirements:

[0017] The beneficial effects of the Onepass printing device and its control method of the present invention are as follows: by selectively and purposefully turning on the UV lamps with different UV lamp powers, not only can the length of the printing device be reduced by shortening the horizontal length of the ink ejected from the printhead, but the photocuring effect can also be improved, thereby ensuring complete ink curing and excellent print quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0019] Figure 1 This is a schematic diagram of the OnePass printing device and the printing medium thereon of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall flow of the control method for the OnePass printing device of the present invention;

[0021] Figure 3 This is a detailed flowchart illustrating one embodiment of the control method for the OnePass printing device of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Nozzle module; 11-Nozzle; 12-Front row; 13-Rear row;

[0024] 20 - Printing media;

[0025] 30-UV lamp module; 31-UV lamp. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, various features in the embodiments and examples of this invention can be combined with each other, all within the scope of protection of this invention.

[0027] refer to Figures 1 to 3 As an object of the present invention, a Onepass printing device is provided, which includes a printhead module 10. The printhead module 10 includes a plurality of printheads 11 arranged in a direction perpendicular to the transport direction of the printing medium 20 for ejecting ink onto the printing medium 20. The plurality of printheads 11 may be in one or more rows and correspondingly located on one or more vertical lines. Figure 1The Y-axis arrow indicates the transport direction, and the X-axis indicates the vertical direction. Multiple printheads 11 in this transport direction can be arranged with UV lamp modules 30 located downstream of printhead module 10 and spaced apart from printhead module 10. UV lamp modules 30 include multiple rows of UV lamps 31 that are spaced apart from each other and parallel to the vertical direction for photocuring ink. That is, there are more than two rows of UV lamps 31. It should be noted that in the vertical direction, the length of the area occupied by each row of UV lamps 31 is greater than or equal to the length of the area occupied by the printheads 11 arranged in one or more rows, thereby ensuring that the ink receives the UV light irradiation energy required for complete curing. Therefore, the Onepass printing device of the present invention provides multiple rows of UV lamps 31 located downstream of multiple printheads 11 in the transport direction. In this way, after the ink is sprayed onto the printing medium 20 by each printhead 11, it is further transported and irradiated by each UV lamp 31. One or more rows of UV lamps 31 can be selectively turned on, or even a portion of one or more rows of UV lamps 31 can be turned on. Therefore, the Onepass printing device of the present invention, by providing multiple rows of UV lamps 31, can selectively and / or target the UV lamps 31 with different UV lamp powers according to factors such as the moving speed of the printing medium 20 and the UV curing ease of the ink. Thus, on the one hand, the multiple rows of UV lamps can provide more photocuring energy than the prior art using a single row of UV lamps 31, thereby correspondingly shortening the leveling length and helping to reduce the length of the printing device. On the other hand, since some UV lamps in each row of multiple UV lamps can be selectively and / or target the printing with different UV lamp powers, the photocuring effect is improved, and the technical effect of complete ink curing and excellent printing quality is obtained.

[0028] Specifically, along the conveying direction, the UV lamp power values ​​of at least some of the multi-row UV lamps 31 are set to increase sequentially row by row in a manner such as step, arithmetic, proportional, or variable proportion. For example, if the maximum UV lamp power value of each row of UV lamps 31 is equal, and assuming that three rows of UV lamps 31 are turned on, then the UV lamp power value of each row can be set to be 20%, 40%, and 60% of the maximum UV lamp power value in a proportional manner or 10%, 30%, and 60% in a variable proportion. That is to say, as the printing medium 20 passes through the printhead module 10 and the UV lamp module 30 in the conveying direction, some or all of the multi-row UV lamps 31 that have been sprayed with ink by the printhead 11 on the printing medium 20 are turned on sequentially and cured with progressively increasing UV lamp power values. This achieves pre-curing with a lower UV lamp power value and then enhanced curing with a higher UV lamp power value, thereby achieving a good curing effect through a stepped irradiation curing method.

[0029] Specifically, the printing speed at which the printing medium 20 is conveyed relative to the printhead 11 to receive inkjet printing is set to V.S S corresponds to the moving speed of different printing media 20, specifically the magnitude and speed of the moving speed, while the UV curing ease of the ink is set as F. L Furthermore, L corresponds to different ink properties, including fluidity, viscosity, volatility, etc. Each row of UV lamps 31 is set to R from near to far from the printhead module 10 along the conveying direction. i And i = 1...N, N ≥ 4 and is a positive integer. Preferably, the spacing between any two adjacent nozzles in each row of 11 is set to be the same, then corresponding to the Rth... i The UV lamp power of UV lamp 31 is set to According to different V S and F L Control the total number of rows of UV lamps 31 that are turned on and the initial sequence number, and V S The faster you go, the more rows you can open. L The more difficult the problem, the larger the initial sort number. When the total number of rows is 1 and the initial sort number is the Kth row, where K ∈ i and K is a positive integer, then the corresponding UV lamp power... Open the R K For example, in the case of low moving speed and poor ink flow, the UV lamp 31 in the last row of UV lamps 31 in the conveying direction is turned on. When the total number of rows turned on is greater than 1 and the initial sequence number is M, where M∈i and M is a positive integer, the corresponding Rth row of UV lamps is turned on. M R M+1 ...R N For example, in the case of a low moving speed and normal ink flow, the UV lamps 31 in the multi-row UV lamps 31 are turned on, for example, in the case of a low moving speed and normal ink flow, a total of N-M+1 rows of UV lamps 31 located in the conveying direction are turned on, and the UV lamp power corresponding to each row of turned-on UV lamps 31 is... The numerical values ​​are set to increase sequentially. This allows for more leveling time in situations where UV curing is more difficult due to poor ink flow, and the use of a stepped irradiation curing method ensures complete ink curing.

[0030] Preferably, the different moving speeds corresponding to S are set as low speed, medium speed, high speed, and ultra-high speed, respectively, then the printing speed V S Correspondingly, V 低 V 中 V 高 and V 超 If ink property L is categorized into poor flowability, normal flowability, and good flowability based on the difficulty of UV curing, from most difficult to easiest, then the ink UV curing difficulty property F is... L Correspondingly, they are F 差 F 正 and F好 Since the speed of the moving light affects the duration of light exposure for the ink, the moving light is divided into four levels to provide more targeted light exposure time. The fluidity of the ink has a more significant impact on the ease of UV curing. In this invention, the fluidity of the ink is used as the criterion for judging the ease of UV curing. Therefore, the multi-row UV lamps 31 of the Onepass printing device of this invention can provide more targeted light intensity for ink curing, thereby obtaining a better curing effect.

[0031] Preferably, when V S For V 低 F L For F 差 When the total number of rows is set to 1 and K is set to N, the Rth row will be set to... N 31 UV lamps with UV lamp power For inks with poor flowability, achieving the longest possible leveling time is more important than the curing effect achieved through pre-curing and enhanced curing. Therefore, in this case, only the last row of UV lamps 31 is turned on for curing, which provides the ink with sufficient flowability and maximizes the leveling time; when V S Let V be the value of V. 低 F L Let it be F 正 When the total number of rows is turned on is set to (N-1) / 2+1 or N / 2, and M is correspondingly set to (N-((N-1) / 2+1)) or NN / 2, where (N-1) / 2+1 corresponds to when N is a positive odd number, and N / 2 corresponds to when N is a positive even number. That is, as described above, the UV lamps 31 in rows M, M+1...N are turned on sequentially with the UV lamp power value increasing row by row, and the Rth row... N 31 UV lamps with UV lamp power When V is enabled S Let V be the value of V. 低 F L Let it be F 好 When the total number of rows is set to N and M is set to 1, that is, as described above, the UV lamps 31 in rows 1, 2...N are turned on sequentially with increasing UV lamp power values ​​for each row, and the Rth row... N 31 UV lamps with UV lamp power Enabled; and satisfies: Therefore, the Onepass printing device of this invention not only selectively activates the corresponding row of UV lamps 31 and adjusts the UV lamp power value according to different printing speeds and ink flow to obtain the best curing effect, but also achieves optimal curing results by selectively activating the corresponding row of UV lamps 31 and adjusting the UV lamp power value according to different printing speeds and ink flow, but also by adjusting the last row, i.e., R... NThe UV lamp power of the arranged UV lamps 31 is adjusted from high to low according to the ink's fluidity, from poor to good. This effectively addresses the different leveling times and curing difficulties required for inks with varying fluidities, achieving complete ink curing while also reducing energy consumption and extending the lifespan of the UV lamps 31. Furthermore, this embodiment only uses V... 低 With different F L Examples of combinations are given below; for other V combinations... 中 V 高 and V 超 Each with different F L The combination of these factors can be used to determine the activation and power control methods for multiple UV lamps 31, based on the principle of ensuring the required leveling length and light curing energy. These details will not be elaborated here.

[0032] The following combination Figure 1 To elaborate further, Figure 1 The multiple UV lamps 31 are arranged in 5 rows and labeled with numbers 1, 2, 3, 4, and 5 from closest to furthest from the nozzle module 10, from smallest to largest. Therefore, N is set to 5, and when V S Let V be the value of V. 低 F L Let it be F 差 When K is 5, the UV lamp 31 in row R5 is set to UV lamp power. On; when V S Let V be the value of V. 低 F L Let it be F 正 When the total number of rows is 3 and M is set to 3, the UV lamps 31 in rows R3, R4 and R5 are set to UV lamp power respectively. and On; when V S Let V be the value of V. 低 F L Let it be F 好 When the total number of rows is 5 and M is set to 1, the UV lamps 31 in rows R1, R2, R3, R4 and R5 are set to UV lamp power respectively. and Turn on, and

[0033] Reference Figure 1 Preferably, the plurality of nozzles 11 are arranged in parallel at intervals in directions opposite to the conveying direction, forming a first row to a W-th row, where 2 ≤ W ≤ 4 and W is a positive integer. In this embodiment, W = 2 is used as an example for explanation, and for the R-th row of nozzles that are turned on for pre-curing... i 31 UV lamps, meaning that the Rth lamp with a total of ≥2 rows is turned on and pre-cured.i In the row where i < N, the UV lamp power used to spray ink from the printheads 11 in rows 11 from the first to the Wth row is... Decrease step by step; therefore, for the case where W=2, Figure 1 The diagram shows two rows of printheads 11: the front row 12 (first row) and the rear row 13 (second row). The front row printheads 11 print first, followed by the rear row printheads 11. The ink from the two rows of printheads 11 lands on the printing medium 20 at different times. Because the ink from the front row printheads 11 lands earlier, it has a higher degree of leveling on the printing medium 20. Therefore, a higher light power is required for pre-curing. Conversely, the ink from the rear row printheads 11 has a lower degree of leveling on the printing medium 20, so a relatively lower light power can be used for curing. Thus, the same row of UV lamps 31 can use different light powers for pre-curing of inks sprayed from different rows of printheads 11, thereby achieving excellent pre-curing results.

[0034] Preferably, the low speed, medium speed, high speed, and ultra-high speed are set to 0-30m / min, 30-80m / min, 80-100m / min, and 100-140m / min, respectively. By setting each speed to the above-mentioned range, the Onepass printing device of the present invention can take into account the speed, quality, and curing effect of the printed image. The UV lamp power value of each row of UV lamps 31 is adjustable between 0% and 100% of the maximum UV lamp power value. The UV lamp power value of each row of UV lamps 31 decreases from high to low, and can be adaptively adjusted according to low power of 20-30w, high power of 90-100w, and common power of 50-60w.

[0035] Reference Figure 2 and Figure 3 As another objective of this invention, a control method for a Onepass printing device is provided for controlling the various Onepass printing devices described above. For details regarding the structure and operation of the Onepass printing device, please refer to the above description; further details will not be repeated here. (Refer to the references.) Figure 1The Onepass printing device for applying the control method of this invention includes a central processing module and a printhead module control module, a UV lamp module control module, and a printing media delivery control module, all electrically connected and communicating with the central processing module. The printhead module control module receives inkjet signals from the central processing module, such as print resolution, and controls the operation of one or more rows of printheads 11. The UV lamp module control module receives signals from the central processing module, such as the total number of printheads to be activated, the initial sequence number, and the UV lamp power, determined by the central processing module based on the obtained printing speed and the UV curing ease of the ink, and controls the operation of the corresponding UV lamps 31. The printing media delivery control module receives the printing speed signal transmitted by the central processing module to control the moving speed of the printing media 20. The module can receive, for example, user input of ink type (including ink characteristics such as flowability, viscosity, and / or volatility) and printing speed to confirm the required printing task. It further determines the execution instructions to be transmitted to the printhead module control module, UV lamp module control module, and printing media delivery control module by calling stored information in its memory corresponding to the ink type, such as the UV curing ease of the ink, the total number of printing rows activated, the initial sequence number, and the UV lamp power. The central processing module, printhead module control module, UV lamp module control module, and printing media delivery control module can be integrated onto a single central processing unit (CPU), or multiple specific integrated circuits with processing and control functions can be used. Further reference... Figure 2 The control method includes the following steps: S10: Obtain V S and F L S20: Determine the total number of rows of UV lamps 31 that are turned on and the initial sequence number; S30: If the determined total number of rows of lamps to be turned on is 1 and the initial sequence number is the Kth row, then control the UV lamp power. Open the R K S40: If the determined total number of rows to be turned on is greater than 1 and the initial sequence number is L, then control the UV lamp power to increase row by row. To correspondingly activate the Rth M R M+1 ...R N The UV lamps 31 are arranged in a row. Therefore, the control method of the Onepass printing device of the present invention can selectively and purposefully turn on the UV lamps 31 with different UV lamp powers. This not only reduces the length of the printing device by shortening the leveling length, but also improves the photocuring effect, thereby achieving the technical effect of complete ink curing and excellent print quality.

[0036] Please refer to further information. Figure 1 and Figure 3Specifically, step S10 further includes the following step: S11: Obtain the different moving speeds corresponding to S and set them as low speed, medium speed, high speed and ultra-high speed respectively, and then determine the printing speed V. S Correspondingly, V 低 V 中 V 高 and V 超 S12: Obtain ink characteristic L and assign it to poor flowability, normal flowability, and good flowability according to the difficulty of UV curing, from most difficult to easiest, to determine the ink's UV curing difficulty characteristic F. L Correspondingly, they are F 差 F 正 and F 好 Therefore, the Onepass printing equipment's control method can regulate the operation of multiple rows of UV lamps 31 based on four levels of travel speed and different ink flow rates, thereby providing more targeted light intensity to enhance the UV curing effect.

[0037] Please refer to further information. Figure 1 and Figure 3 Specifically, the control method further includes step S31, which is a further component of step 30: acquiring V respectively. S and F L For V 低 and F 差 Then, determine that the total number of rows to be turned on is 1 and the initial number of rows is N, and then control the UV lamp power. Open the R N UV lamp 31; Step 40 further includes the following steps: S41: Obtain V S and F L For V 低 and F 正 Then, determine the total number of rows to be turned on as (N-1) / 2+1 or N / 2, and the initial sorting number M as (N-((N-1) / 2+1)) or N / 2 accordingly. Here, (N-1) / 2+1 corresponds to when N is a positive odd number, and N / 2 corresponds to when N is a positive even number. Control the UV lamp power to increase row by row. Correspondingly activate the Rth M R M+1 ...R N UV lamps 31 and S42 are arranged in rows to obtain V. S and F L For V 低 and F 好 Then, determine that the total number of rows to be turned on is N and M is 1, and then control the UV lamp power to increase row by row. Correspondingly activate R1, R2...R N The array has 31 UV lamps; and the control satisfies: Therefore, the control method of the Onepass printing device of this invention can not only selectively activate the corresponding row of UV lamps 31 and adjust the UV lamp power value to obtain the best curing effect, but also, by controlling the last row, i.e., R... N Controlling the power of the UV lamps in the UV lamp 31 not only achieves the technical effect of complete ink curing, but also helps to reduce energy consumption and extend the service life of the UV lamps 31.

[0038] Additionally, it should be noted that the ink described in this specification may more specifically be UV ink. Furthermore, for the specific implementation methods and beneficial effects of the control methods related to controlling the ink jetting of multiple different rows of printheads 11 and the moving speed of the printing medium 20, please refer to the above description of any Onepass printing device and consult general technical knowledge in the field, and will not be repeated here.

[0039] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0041] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0042] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A Onepass printing device, characterized in that, include: A printhead module comprising a plurality of printheads arranged in a vertical direction perpendicular to the transport direction of the printing medium for ejecting ink onto the printing medium. A UV lamp module located downstream of the nozzle module and spaced apart from the nozzle module in the conveying direction; The UV lamp module includes multiple rows of UV lamps spaced apart from each other and parallel to the vertical direction for photocuring ink; The printing medium is conveyed relative to the printhead at a printing speed set to accept inkjet printing. S corresponds to the movement speed of different printing media, and the UV curing ease of the ink is set to... Furthermore, L corresponds to different ink characteristics, and the UV lamps in each row are respectively positioned from near to far from the printhead module along the conveying direction. And i = 1...N, N ≥ 4 and is a positive integer, then the corresponding number is the... The UV lamp power of the UV lamp array is set to According to different as well as Control the total number of rows of UV lamps in operation and the initial sequence number, and The faster you go, the more rows you can open. The more difficult the sorting, the larger the initial sorting number. Furthermore, when the total number of sorting rows is 1 and the initial sorting number is the Kth row, And since K is a positive integer, the corresponding UV lamp power Open the first When arranging UV lamps, if the total number of rows is greater than 1 and the initial sequence number is M, And if M is a positive integer, then the corresponding [function name] is activated. , A row of UV lamps, and the UV lamp power corresponding to each row of turned-on UV lamps. , The numerical values ​​are set to increase sequentially from row to row.

2. The Onepass printing device according to claim 1, characterized in that, The different moving speeds corresponding to S are respectively set as low speed, medium speed, high speed and ultra-high speed, then the printing speed Correspondingly , , and Ink characteristic L is categorized into poor flowability, normal flowability, and good flowability based on the difficulty of UV curing, from most difficult to easiest. Therefore, the ink's UV curing difficulty characteristic... Correspondingly , and .

3. The Onepass printing device according to claim 2, characterized in that, when for , for When the total number of rows is set to 1 and K is set to N, the number of rows will be set to... UV lamps are arranged according to their UV lamp power. Turn on; when Set as , Set as When the total number of rows is set to be greater than (N-1) / 2+1 or N / 2, and M is set accordingly to (N-((N-1) / 2+1)) or N / 2, where (N-1) / 2+1 corresponds to when N is a positive odd number, and N / 2 corresponds to when N is a positive even number, and the number of rows is set to... UV lamps are arranged according to their UV lamp power. Turn on; when Set as , Set as When the total number of rows is set to N and M is set to 1, the first row will be... UV lamps are arranged according to their UV lamp power. Turn on; And it satisfies: .

4. The Onepass printing device according to claim 1, characterized in that, The plurality of nozzles are arranged in parallel at intervals in directions opposite to the conveying direction, forming rows 1 to W, where 2 ≤ W ≤ 4 and W is a positive integer, and for the first row used for pre-curing... The UV lamps used are specifically designed for the ink ejected from the printheads in rows one through W. Decrease step by step.

5. The Onepass printing device according to claim 2, characterized in that, The low speed, medium speed, high speed and ultra-high speed are set to 0~30, 30~80, 80~100 and 100~140 (m / min) respectively, and the UV lamp power value of each row of UV lamps is adjustable between 0% and 100% of the maximum UV lamp power value.

6. A control method for a Onepass printing device, characterized in that, The control method for controlling the Onepass printing device as described in any one of claims 1-5 includes: Get and ; Determine the total number of rows of UV lamps to be turned on and the initial sequence number; If the total number of rows to be turned on is determined to be 1 and the starting sequence number is row K, then the control is based on the UV lamp power. Open the first UV lamps; If the total number of rows to be turned on is greater than 1 and the initial sequence number is M, then control the UV lamp power to increase sequentially for each row. , To correspondingly open the first , A row of UV lamps.

7. The control method according to claim 6, characterized in that, The acquisition and The steps also include: The different moving speeds corresponding to S are set as low speed, medium speed, high speed, and ultra-high speed, and then the printing speed is determined. Correspondingly , , and ; The ink characteristic L was determined by classifying inks into poor flowability, normal flowability, and good flowability, from most difficult to easiest UV curing, thereby establishing the ink's ease of UV curing. Correspondingly , and .

8. The control method according to claim 6, characterized in that, The control method further includes: Obtain each and for and Then, determine that the total number of rows to be turned on is 1 and the initial number of rows is N, and then control the UV lamp power. Open the first UV lamps; Obtain each and for and Then, determine the total number of rows to be turned on as (N-1) / 2+1 or N / 2, and the initial sequence number as M. (N-1) / 2+1 corresponds to when N is a positive odd number, and N / 2 corresponds to when N is a positive even number. Control the UV lamp power to increase row by row. , Correspondingly open the first , A row of UV lamps; Obtain each and for and Then, determine the total number of rows to be turned on as N, and then control the UV lamp power to increase row by row. , Correspondingly open the first , Arranged UV lamp; And the control satisfies: .

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