Method, system and equipment for improving UV matte printing effect and medium

Abstract

The invention relates to the technical field of printing, in particular to a method, system and equipment for improving the UV matte printing effect and a medium. The method comprises the following steps: acquiring structural parameters of a printing machine, a paper running path and physical and chemical parameters of UV gloss oil, simulating and calculating theoretical leveling time of the UV gloss oil at different positions, and determining a target area in which the leveling time needs to be prolonged according to a preset threshold value; and based on the specific position of the target area and the paper movement state, the optimal pre-curing position distance of the UV curing unit is optimized and determined, and the mounting position is adjusted, so that the problem of poor UV gloss oil leveling and curing caused by the fact that the curing unit layout cannot be dynamically optimized and adjusted in the prior art is solved; the position of the UV curing unit can be dynamically adjusted based on the actual working condition of the printing machine, so that the UV gloss oil obtains sufficient leveling time in different printing areas and achieves a good curing effect, and the overall quality and consistency of UV gloss and matte printing are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of printing, and in particular to a method, system, equipment and medium for improving UV matte printing effect. Background Art

[0002] Printing processing is a widely used modern technology. Especially with the development of UV light-curing ink technology, UV matte printing technology has gradually replaced traditional printing technology and has been promoted and applied in many fields. UV matte printing can give the product surface a unique feel and is very popular in packaging printing, decoration printing and other fields.

[0003] At present, UV matte printing mainly relies on automated printing equipment to achieve the desired printing effect by precisely controlling the coating amount and curing process of UV varnish. The existing technology usually adopts a preset fixed UV light curing unit arrangement. For different printing process parameters and substrate characteristics, the curing unit position cannot be dynamically adjusted, and it is difficult to meet the requirements of full leveling and curing of UV varnish under different working conditions, thus affecting the final printing effect and quality. This situation needs to be further improved. Summary of the invention

[0004] In order to solve the problem that the existing UV matte printing equipment is difficult to meet the requirements of sufficient leveling and curing of UV varnish under different working conditions, the present application provides a method, system, equipment and medium for improving the UV matte printing effect, adopting the following technical solutions: In a first aspect, the present application provides a method for improving UV matte printing effect, comprising the following steps: Obtain the structural parameters of the printing press, the paper running path parameters and the physical and chemical parameters of the UV varnish; Based on the structural parameters, paper running path parameters and physical and chemical parameters, the paper movement state parameters between the color seats are determined and the theoretical leveling time of the UV varnish at different positions is calculated; According to the theoretical leveling time and the preset leveling time threshold, determining the target printing area where the leveling time of the UV varnish needs to be extended; Acquire the specific position of the target printing area and the corresponding motion state parameters, and determine the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameters; According to the optimal pre-curing position distance, the position parameters of the UV curing unit are adjusted.

[0005] By adopting the above-mentioned technical scheme, the present application obtains the structural parameters of the printing press, the paper running path and the physical and chemical parameters of the UV varnish, simulates and calculates the theoretical leveling time of the UV varnish at different positions, and determines the target area where the leveling time needs to be extended according to the preset threshold; then based on the specific position of the target area and the movement state of the paper, optimizes and determines the optimal pre-curing position distance of the UV curing unit and adjusts the installation position, thereby solving the problem of poor leveling and curing of the UV varnish caused by the inability to dynamically optimize and adjust the layout of the curing unit in the prior art, and can dynamically adjust the position of the UV curing unit based on the actual working conditions of the printing press, so that the UV varnish obtains sufficient leveling time in different printing areas and achieves a good curing effect, thereby effectively improving the overall quality and consistency of UV matte printing.

[0006] Optionally, based on the structural parameters, paper running path parameters and physical and chemical parameters, determining the paper movement state parameters between the color seats and calculating the theoretical leveling time of the UV varnish at different positions specifically comprises the following steps: based on the structural parameters and paper running path parameters, obtaining the position coordinates of each color seat of the printing press and the movement path of the paper between the color seats; Obtaining the viscosity and surface tension of the UV varnish based on the physicochemical parameters; According to the position coordinates of each color seat, the movement path of the paper between the color seats, the viscosity and surface tension of the UV varnish, simulate the instantaneous movement speed and acceleration of the paper between the color seats; Based on the instantaneous motion speed and acceleration, the theoretical leveling time of the UV varnish at different positions is calculated.

[0007] By adopting the above technical scheme, the present application first obtains the position coordinates of each color seat and the paper movement path based on the printing machine structural parameters and the paper operation path parameters; then combines the viscosity and surface tension obtained based on the physical and chemical parameters of the UV varnish to simulate and calculate the instantaneous movement speed and acceleration of the paper between the color seats; finally, based on the instantaneous movement speed and acceleration, calculates the theoretical leveling time of the UV varnish at different positions, which can provide a key theoretical basis for the subsequent extension of the leveling time and adjustment of the position of the UV curing unit, thereby improving the overall quality and effect of UV matte printing.

[0008] Optionally, determining the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameter specifically includes the following steps: Based on the specific position and the motion state parameters, the actual exposure time of the UV varnish in the target printing area is determined; the curing wavelength and energy intensity of the UV curing unit are obtained, and based on the actual exposure time, the curing wavelength and the energy intensity, the cumulative irradiation energy of the UV varnish in the target printing area under different pre-curing position distance conditions is calculated; The minimum irradiation energy threshold required for the UV varnish curing reaction is obtained, and the optimal pre-curing position distance that satisfies the minimum irradiation energy threshold and obtains the maximum leveling time of the UV varnish is determined.

[0009] By adopting the above technical scheme, the present application first determines the actual exposure time of UV varnish in the target printing area based on the specific position of the target printing area and the paper movement state parameters; then obtains the curing wavelength and energy intensity of the UV curing unit, and calculates the cumulative irradiation energy of the UV varnish in the area under different pre-curing distances based on the actual exposure time, wavelength and energy intensity; then obtains the minimum irradiation energy threshold required for UV varnish curing; finally, determines the distance that satisfies the energy threshold and obtains the maximum leveling time of the UV varnish as the optimal pre-curing position distance; can dynamically calculate and set the optimal UV curing unit pre-curing distance for the target printing area, so that the UV varnish in the area can obtain sufficient leveling time to form an ideal surface, and at the same time can meet the minimum irradiation energy requirements required for curing, thereby effectively balancing the leveling effect and the degree of curing, and comprehensively optimizing the UV matte printing effect.

[0010] Optionally, after adjusting the position parameters of the UV curing unit according to the optimal pre-curing position distance, the method further comprises the following steps: Obtaining specular reflectivity parameters of the printed substrate; According to the specular reflectivity parameter, the leveling effect of the current UV varnish on the substrate is analyzed to obtain a leveling effect analysis result; According to the leveling effect analysis result, the printed substrate is divided into regions to determine unqualified regions; Determine the compensation leveling time of the UV varnish in the unqualified area according to the specific position and motion state parameters corresponding to the unqualified area; According to the compensated leveling time, the pre-curing position distance and energy output ratio of the corresponding UV curing unit are adjusted, and local compensation process parameters are generated and sent to the UV curing unit.

[0011] By adopting the above technical scheme, due to the differences in the mirror reflection properties of different printing substrates, even if the position of the UV curing unit has been adjusted to the optimal distance, the leveling effect of the UV varnish in some areas may be unsatisfactory, thereby affecting the printing quality of the area; the present application first obtains the mirror reflectivity parameter of the printing substrate; then analyzes the current leveling effect of the UV varnish according to the parameter to obtain the analysis result; then divides the substrate into regions according to the analysis result to determine the unqualified area; then determines the compensation leveling time of the UV varnish in the region according to the specific position corresponding to the unqualified area and the movement state of the paper; finally, according to the compensation time, adjusts the pre-curing distance and energy output ratio of the corresponding UV curing unit, generates and sends local compensation process parameters to the curing unit, so as to optimize the leveling state of the UV varnish in different substrate regions in a targeted manner, and make up for the local deficiencies that may exist only by relying on the overall optimal pre-curing distance.

[0012] Optionally, after adjusting the pre-curing position distance and energy output of the corresponding UV curing unit according to the compensated leveling time, and generating and sending the local compensation process parameters to the UV curing unit, the method further includes the following steps: Obtain the pre-established theoretical model curve between the leveling rate of UV varnish and the glossy-matte printing effect; Obtain the actual leveling rate difference between the qualified area and the unqualified area of ​​the UV varnish on adjacent printed substrates; According to the theoretical model curve and the actual leveling rate difference, the leveling performance attenuation trend of the UV varnish is analyzed to obtain the critical value of the leveling performance; When the actual leveling performance of the UV varnish reaches the critical value, a UV varnish replacement instruction is sent to the system.

[0013] By adopting the above technical scheme, since the rheological properties of UV varnish will gradually decay during long-term use, the present application first obtains a pre-established theoretical model curve between the leveling rate of UV varnish and the matte printing effect; then obtains the actual leveling rate difference of the UV varnish in the qualified area and the unqualified area on the adjacent printing substrate; then, according to the theoretical model curve and the actual rate difference, the leveling performance decay trend of the UV varnish is analyzed to obtain the critical value of the leveling performance; finally, when the actual leveling performance of the UV varnish reaches the critical value, a UV varnish replacement instruction is issued to the system, so that the replacement instruction can be actively issued before the performance of the UV varnish drops to a certain level, thereby avoiding printing quality problems caused by the complete deterioration of the UV varnish, and ensuring the reliability and stability of the overall quality of UV matte printing.

[0014] Optionally, the method further comprises the following steps: Obtain a pre-established theoretical model between the surface roughness of the printed substrate and the spreading performance of the UV varnish; Obtaining current surface roughness parameters of the printing substrate; According to the current surface roughness parameters and the theoretical model, optimized anilox roller parameters suitable for the current surface roughness are determined and output.

[0015] By adopting the above technical scheme, the present application first obtains a pre-established theoretical model between the surface roughness of the printing substrate and the spreading performance of the UV varnish; then obtains the surface roughness parameters of the current printing substrate; then, based on the current roughness parameters and the theoretical model, determines the optimized anilox roller parameters suitable for the roughness; finally, the determined optimized parameter output is applied to the anilox roller, and the anilox roller parameters can be dynamically adjusted according to the surface characteristics of the actual printing substrate, so that the UV varnish can obtain a good and adaptive spreading effect on substrates with different roughness, promote the improvement of the overall quality of UV matte printing, and comprehensively enhance the applicability and stability of the printing process.

[0016] In a second aspect, the present application provides a system for improving UV matte printing effects, comprising: A parameter acquisition module is used to acquire the structural parameters of the printing press, the paper running path parameters and the physical and chemical parameters of the UV varnish; a leveling time determination module is used to determine the paper movement state parameters between the color seats and calculate the theoretical leveling time of the UV varnish at different positions based on the structural parameters, the paper running path parameters and the physical and chemical parameters; A target printing area determination module, used to determine the target printing area where the UV varnish leveling time needs to be extended according to the theoretical leveling time and a preset leveling time threshold; A position distance determination module, used to obtain the specific position of the target printing area and the corresponding motion state parameters, and determine the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameters; A position adjustment module is installed to adjust the position parameters of the UV curing unit according to the optimal pre-curing position distance.

[0017] In a third aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for improving the UV matte printing effect when executing the computer program.

[0018] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for improving the above-mentioned UV matte printing effect are implemented.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application obtains the structural parameters of the printing press, the paper running path and the physical and chemical parameters of the UV varnish, simulates and calculates the theoretical leveling time of the UV varnish at different positions, and determines the target area where the leveling time needs to be extended according to the preset threshold; then based on the specific position of the target area and the movement state of the paper, optimizes and determines the optimal pre-curing position distance of the UV curing unit and adjusts the installation position, which solves the problem of poor leveling and curing of the UV varnish caused by the inability to dynamically optimize and adjust the layout of the curing unit in the prior art, and can dynamically adjust the position of the UV curing unit based on the actual working conditions of the printing press, so that the UV varnish obtains sufficient leveling time in different printing areas and achieves a good curing effect, thereby effectively improving the overall quality and consistency of UV matte printing; 2. This application first obtains the position coordinates of each color seat and the paper movement path based on the printing machine structural parameters and the paper running path parameters; then, combined with the viscosity and surface tension obtained based on the physical and chemical parameters of the UV varnish, simulates and calculates the instantaneous movement speed and acceleration of the paper between the color seats; finally, based on the instantaneous movement speed and acceleration, calculates the theoretical leveling time of the UV varnish at different positions, which can provide a key theoretical basis for the subsequent extension of the leveling time and adjustment of the UV curing unit position, and improve the overall quality and effect of UV matte printing; 3. The present application first obtains a pre-established theoretical model curve between the leveling rate of UV varnish and the matte printing effect; then obtains the actual leveling rate difference of the UV varnish in the qualified area and the unqualified area on the adjacent printing substrate; then, according to the theoretical model curve and the actual rate difference, the leveling performance attenuation trend of the UV varnish is analyzed to obtain the critical value of the leveling performance; finally, when the actual leveling performance of the UV varnish reaches the critical value, a UV varnish replacement instruction is issued to the system, so that the replacement instruction can be actively issued before the performance of the UV varnish drops to a certain level, thereby avoiding printing quality problems caused by the complete deterioration of the UV varnish, and ensuring the reliability and stability of the overall quality of UV matte printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a method for improving UV matte printing effect according to an embodiment of the present application; Figure 2 This is a flow chart of step S20 in a method for improving UV matte printing effect according to an embodiment of the present application; Figure 3 It is a flow chart of step S40 in a method for improving UV matte printing effect in an embodiment of the present application; Figure 4 It is a schematic diagram of a flow chart of compensating the leveling time in a method for improving the UV matte printing effect in an embodiment of the present application; Figure 5It is a flow chart of issuing a UV varnish replacement instruction in a method for improving UV matte printing effect in an embodiment of the present application; Figure 6 It is a schematic diagram of a process for optimizing anilox roller parameters in a method for improving UV matte printing effect in an embodiment of the present application; Figure 7 This is a module schematic diagram of a system for improving UV matte printing effect according to an embodiment of the present application; Figure 8 It is a diagram of the internal structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to any or all possible combinations comprising one or more listed items.

[0022] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0023] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0024] In the first aspect, the present application provides a method for improving the UV matte printing effect, referring to Figure 1 , including the following steps: S10, obtaining the structural parameters of the printing press, the paper running path parameters and the physical and chemical parameters of the UV varnish.

[0025] In this embodiment, the structural parameters include the size and position coordinates of each module of the printing machine to reflect the physical layout of the whole machine; the paper running path parameters include the movement trajectory and speed curve of the paper between the color seats to describe the actual running state of the paper; the physical and chemical parameters mainly refer to the performance parameters such as the viscosity and surface tension of the UV varnish.

[0026] Specifically, the structural parameters of the printing press are obtained by on-site measurement or by importing design data. The movement trajectory and speed of the paper at each transmission component are collected in real time using sensors to obtain the paper operation path parameters. The physical and chemical parameters of the UV varnish are obtained from the manufacturer.

[0027] S20, based on the structural parameters, paper running path parameters and physical and chemical parameters, determine the paper movement state parameters between the color seats and calculate the theoretical leveling time of the UV varnish at different positions.

[0028] In this embodiment, the paper motion state parameters include the instantaneous motion speed and acceleration of the paper between the color seats, and the UV varnish leveling time refers to the time required for the UV varnish to reach a flat surface after being coated.

[0029] Specifically, based on the acquired structural parameters, operation path parameters, UV varnish viscosity and other parameters, a model was established and the instantaneous velocity, acceleration and other motion states of the paper between the color seats were simulated and calculated; then, based on these motion state parameters and UV varnish performance parameters, the theoretical leveling time of UV varnish at different printing positions was calculated.

[0030] S30, determining a target printing area where the UV varnish leveling time needs to be extended according to the theoretical leveling time and a preset leveling time threshold.

[0031] In this embodiment, the leveling time threshold refers to the pre-set minimum leveling time required for the UV varnish to obtain a good leveling effect; the target printing area is the area where the theoretical leveling time of the UV varnish cannot meet the threshold requirement.

[0032] Specifically, the calculated theoretical leveling time of UV varnish at different positions is compared with the preset leveling time threshold, and the printing area with a theoretical value less than the threshold is determined as the target printing area that needs to extend the leveling time. For example, if the threshold is 0.5 seconds, and the theoretical leveling time of UV varnish in a certain area is only 0.3 seconds, then this area is the target printing area.

[0033] S40, obtaining a specific position of the target printing area and corresponding motion state parameters, and determining an optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameters.

[0034] In this embodiment, the specific position of the target printing area is represented by coordinates; the optimal pre-curing distance refers to the distance between the UV curing unit and the area so that the UV varnish can obtain sufficient leveling time in the area and meet the curing energy requirements.

[0035] Specifically, based on the position coordinates of the target printing area, the corresponding paper motion state parameters are found; then according to these parameters, the curing wavelength and energy intensity of the UV curing unit, the cumulative irradiation energy and corresponding leveling time of the UV varnish in this area at different pre-curing distances are calculated, and then the optimal distance that can enable the UV varnish to obtain the maximum leveling time and meet the curing energy requirements is determined.

[0036] S50, adjusting the position parameters of the UV curing unit according to the optimal pre-curing position distance.

[0037] In this embodiment, the UV curing unit position parameter refers to the distance setting value between the curing unit and each printing area.

[0038] Specifically, auxiliary mechanisms are added to adjust the installation position of the curing unit, such as installing slide rails, screw transmission mechanisms, etc., so that the curing unit can adjust its position forward and backward along the running direction of the printed paper, and a closed-loop servo drive system is constructed to drive the auxiliary mechanism. The optimal pre-curing distance calculated for each target area is written into the control system of the UV curing unit, thereby adjusting the actual distance between each curing unit and the corresponding area accordingly.

[0039] In one embodiment, referring to Figure 2 In step S20, based on the structural parameters, paper running path parameters and physical and chemical parameters, the paper movement state parameters between the color seats are determined and the theoretical leveling time of UV varnish at different positions is calculated, which specifically includes the following steps: S21. Based on the structural parameters and the paper running path parameters, the position coordinates of each color seat of the printing press and the moving path of the paper between the color seats are obtained.

[0040] In this embodiment, the color seat position coordinates refer to the specific coordinate values ​​of each color seat in the coordinate system of the entire machine; the paper movement path refers to the actual running track of the paper between the color seats.

[0041] Specifically, the installation position coordinates of each color seat are parsed from the structural parameters; at the same time, the actual movement trajectory of the paper at each tension sensor, guide roller and other transmission components are extracted from the paper running path parameters, and then the movement path of the paper between the color seats is determined.

[0042] S22. Obtain the viscosity and surface tension of UV varnish based on physical and chemical parameters.

[0043] In this embodiment, viscosity and surface tension are key physical and chemical parameters that affect the leveling performance of UV varnish.

[0044] S23, simulating the instantaneous movement speed and acceleration of the paper between the color seats according to the position coordinates of the color seats, the movement path of the paper between the color seats, the viscosity and surface tension of the UV varnish.

[0045] Specifically, a dynamic model is constructed, and the color seat coordinates, paper movement path, UV varnish viscosity, surface tension, etc. are used as model inputs to simulate and calculate the instantaneous movement speed and acceleration of the paper between the color seats.

[0046] S24. Based on the instantaneous motion speed and acceleration, the theoretical leveling time of UV varnish at different positions is calculated.

[0047] Specifically, based on the formula t=(3η / γ)[(1+5(av / v2)) / (1+2.5(av / v2))]*L, the theoretical leveling time value of UV varnish at different positions between each color seat is calculated, wherein t represents the theoretical leveling time of UV varnish, η represents the viscosity of UV varnish, γ represents the surface tension of UV varnish, a represents the acceleration of paper, v represents the instantaneous movement speed of paper, and L represents the length of the printing area considered.

[0048] In one embodiment, referring to Figure 3 In step S40, based on the specific position and motion state parameters, the optimal pre-curing position distance between the UV curing unit and the target printing area is determined, which specifically includes the following steps: S41. Based on the specific position and motion state parameters, determine the actual exposure time of the UV varnish in the target printing area.

[0049] In this embodiment, the actual exposure time refers to the time from when the UV varnish is applied to when it is irradiated by the UV curing unit in the target area.

[0050] Specifically, the actual exposure time of UV varnish in the target printing area is calculated based on the specific position coordinates of the determined target printing area and the paper movement speed. For example, if the length of a target area is 0.2 meters and the paper speed is 2 meters per second, the exposure time of UV varnish in the area is about 0.1 seconds.

[0051] S42, obtaining the curing wavelength and energy intensity of the UV curing unit, and calculating the cumulative irradiation energy of the UV varnish in the target printing area under different pre-curing position distance conditions based on the actual exposure time, curing wavelength and energy intensity.

[0052] In this embodiment, different pre-curing distances will result in different cumulative radiation energies received by the UV varnish in the target area.

[0053] Specifically, the UV wavelength and energy intensity value emitted by the UV curing unit are obtained; then, an irradiation model is established according to the length of the target printing area and the actual exposure time, and the cumulative irradiation energy value of the UV varnish in the target printing area at different preset pre-curing distances such as 1cm and 2cm is calculated.

[0054] S43, obtaining a minimum irradiation energy threshold required for a UV varnish curing reaction, and determining an optimal pre-curing position distance that satisfies the minimum irradiation energy threshold and allows the UV varnish to obtain a maximum leveling time.

[0055] Specifically, the minimum irradiation energy threshold required for UV varnish curing can be obtained from the manufacturer, and then the minimum irradiation energy threshold is compared with the calculated cumulative irradiation energy under different distance conditions to determine the distance range that can meet the threshold requirements. Within the distance range, the distance that allows the UV varnish to obtain the longest leveling time in the target area is selected as the optimal pre-curing distance. For example, if the energy reaches the threshold and the leveling time is the longest at a distance of 2cm, then 2cm is the optimal distance for this area.

[0056] In one embodiment, referring to Figure 4 , step S50, after adjusting the position parameters of the UV curing unit according to the optimal pre-curing position distance, the method further comprises the following steps: S51, obtaining the specular reflectivity parameter of the printing substrate.

[0057] Specifically, professional measuring equipment such as a gloss meter is used to detect the surface of the printed substrate to obtain the mirror reflectivity value.

[0058] S52. Analyze the leveling effect of the current UV varnish on the substrate according to the specular reflectivity parameter to obtain a leveling effect analysis result.

[0059] In this embodiment, the obtained mirror reflectivity parameter is compared with the standard reflectivity of the UV varnish under the ideal leveling state, and the leveling effect is determined according to the difference. For example, if the standard reflectivity is 85% and the actual measurement is only 70%, it can be determined that the leveling effect is not ideal.

[0060] S53. According to the leveling effect analysis result, the printed substrate is divided into regions to determine the unqualified regions.

[0061] Specifically, the printed substrate is divided into several small areas, the mirror reflectivity test value of each area is recorded respectively, and based on the analysis results, the area with unsatisfactory leveling effect is marked as an unqualified area.

[0062] S54, determining the compensatory leveling time of the UV varnish in the unqualified area according to the specific position and motion state parameters corresponding to the unqualified area.

[0063] In this embodiment, sufficient leveling time needs to be compensated for the unqualified areas with unsatisfactory leveling.

[0064] Specifically, based on the specific position coordinates of the determined unqualified area, the paper movement speed and other parameters corresponding to the unqualified area are found, and combined with the physical property data of the UV varnish, the compensation leveling time required for the UV varnish in the area is recalculated.

[0065] S55. According to the compensated leveling time, the pre-curing position distance and energy output ratio of the corresponding UV curing unit are adjusted, and local compensation process parameters are generated and sent to the UV curing unit.

[0066] In one embodiment, referring to Figure 5 In step S55, according to the compensation leveling time, the pre-curing position distance and energy output of the corresponding UV curing unit are adjusted, and after the local compensation process parameters are generated and sent to the UV curing unit, the method further includes the following steps: S56, obtaining a pre-established theoretical model curve between the leveling rate of UV varnish and the matte printing effect.

[0067] Since the leveling rate of UV varnish will directly affect the matte effect of printed products, in this embodiment, a theoretical model curve of the leveling rate and matte of UV varnish is obtained by fitting a large amount of experimental data, and the curve is pre-stored in the system.

[0068] S57, obtaining the actual leveling rate difference between the qualified area and the unqualified area of ​​the UV varnish on adjacent printing substrates.

[0069] In this embodiment, the actual leveling rate difference of the UV varnish in the qualified and unqualified areas is obtained in real time to evaluate the degree of performance attenuation.

[0070] Specifically, a high-speed camera is used to monitor the printing process in real time, and the movement speed of the leveling front of UV varnish in the qualified area and the unqualified area is measured respectively. The difference between the two is the actual leveling rate difference.

[0071] S58. According to the difference between the theoretical model curve and the actual leveling rate, the leveling performance attenuation trend of the UV varnish is analyzed to obtain the critical value of the leveling performance.

[0072] Specifically, on the theoretical model curve, find the glossiness difference corresponding to the measured actual leveling rate difference, determine the current performance attenuation percentage of the UV varnish based on the glossiness difference, and set a critical threshold, for example, when the attenuation reaches 70%, it is judged to be critical.

[0073] S59: When the actual leveling performance of the UV varnish reaches a critical value, a UV varnish replacement instruction is sent to the system.

[0074] In one embodiment, referring to Figure 6 , the method further comprises the following steps: S61. Obtain a pre-established theoretical model between the surface roughness of the printing substrate and the spreading performance of the UV varnish.

[0075] S62, obtaining current surface roughness parameters of the printing substrate.

[0076] S63. According to the current surface roughness parameters and the theoretical model, the optimized anilox roller parameters suitable for the current surface roughness are determined and output.

[0077] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0078] In the second aspect, the present application provides a system for improving UV matte printing effects. The system for improving UV matte printing effects of the present application is described below in combination with the above-mentioned method for improving UV matte printing effects.

[0079] Reference Figure 7 , an improved system for UV matte printing effect, comprising: The parameter acquisition module is used to acquire the structural parameters of the printing press, the paper running path parameters and the physical and chemical parameters of the UV varnish; the leveling time determination module is used to determine the paper movement state parameters between the various color seats and calculate the theoretical leveling time of the UV varnish at different positions based on the structural parameters, the paper running path parameters and the physical and chemical parameters; A target printing area determination module is used to determine the target printing area where the UV varnish leveling time needs to be extended according to the theoretical leveling time and the preset leveling time threshold; A position distance determination module is used to obtain the specific position of the target printing area and the corresponding motion state parameters, and determine the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and motion state parameters; A position adjustment module is installed to adjust the position parameters of the UV curing unit according to the optimal pre-curing position distance.

[0080] In one embodiment, the present application provides an electronic device, which may be a server, and its internal structure diagram may be as follows: Figure 8 As shown. The electronic device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the electronic device is used to store data. The network interface of the electronic device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for improving UV matte printing effect is implemented.

[0081] Those skilled in the art will understand that Figure 8The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0082] In one embodiment, an electronic device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0083] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the above-mentioned computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for improving UV matte printing effect, characterized in that: The steps include: Obtain the structural parameters of the printing press, the paper running path parameters and the physical and chemical parameters of the UV varnish; Based on the structural parameters, paper running path parameters and physical and chemical parameters, the paper movement state parameters between the color seats are determined and the theoretical leveling time of the UV varnish at different positions is calculated; According to the theoretical leveling time and the preset leveling time threshold, determining the target printing area where the leveling time of the UV varnish needs to be extended; Acquire the specific position of the target printing area and the corresponding motion state parameters, and determine the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameters; According to the optimal pre-curing position distance, the position parameters of the UV curing unit are adjusted.

2. The method for improving the UV matte printing effect according to claim 1, characterized in that: Based on the structural parameters, paper running path parameters and physical and chemical parameters, the paper movement state parameters between the color seats are determined and the theoretical leveling time of UV varnish at different positions is calculated, which specifically includes the following steps: Based on the structural parameters and the paper running path parameters, the position coordinates of each color seat of the printing press and the movement path of the paper between the color seats are obtained; Obtaining the viscosity and surface tension of the UV varnish based on the physicochemical parameters; According to the position coordinates of each color seat, the movement path of the paper between the color seats, the viscosity and surface tension of the UV varnish, simulate the instantaneous movement speed and acceleration of the paper between the color seats; Based on the instantaneous motion speed and acceleration, the theoretical leveling time of the UV varnish at different positions is calculated.

3. The method for improving the UV matte printing effect according to claim 1, characterized in that: Based on the specific position and the motion state parameter, determining the optimal pre-curing position distance between the UV curing unit and the target printing area specifically includes the following steps: Based on the specific position and the motion state parameter, determining the actual exposure time of the UV varnish in the target printing area; Acquiring the curing wavelength and energy intensity of the UV curing unit, and calculating the cumulative irradiation energy of the UV varnish in the target printing area under different pre-curing position distance conditions based on the actual exposure time, curing wavelength and energy intensity; The minimum irradiation energy threshold required for the UV varnish curing reaction is obtained, and the optimal pre-curing position distance that satisfies the minimum irradiation energy threshold and obtains the maximum leveling time of the UV varnish is determined.

4. The method for improving the UV matte printing effect according to claim 1, characterized in that: After adjusting the position parameters of the UV curing unit according to the optimal pre-curing position distance, the method further comprises the following steps: Obtaining specular reflectivity parameters of the printed substrate; According to the specular reflectivity parameter, the leveling effect of the current UV varnish on the substrate is analyzed to obtain a leveling effect analysis result; According to the leveling effect analysis result, the printed substrate is divided into regions to determine unqualified regions; Determine the compensation leveling time of the UV varnish in the unqualified area according to the specific position and motion state parameters corresponding to the unqualified area; According to the compensated leveling time, the pre-curing position distance and energy output ratio of the corresponding UV curing unit are adjusted, and local compensation process parameters are generated and sent to the UV curing unit.

5. The method for improving the UV matte printing effect according to claim 4, characterized in that: According to the compensated leveling time, the pre-curing position distance and energy output of the corresponding UV curing unit are adjusted, and after the local compensation process parameters are generated and sent to the UV curing unit, the method further includes the following steps: Obtain the pre-established theoretical model curve between the leveling rate of UV varnish and the glossy-matte printing effect; Obtain the actual leveling rate difference between the qualified area and the unqualified area of ​​the UV varnish on adjacent printed substrates; According to the theoretical model curve and the actual leveling rate difference, the leveling performance attenuation trend of the UV varnish is analyzed to obtain the critical value of the leveling performance; When the actual leveling performance of the UV varnish reaches the critical value, a UV varnish replacement instruction is sent to the system.

6. The method for improving the UV matte printing effect according to claim 1, characterized in that: The method further comprises the steps of: Obtain a pre-established theoretical model between the surface roughness of the printed substrate and the spreading performance of the UV varnish; Obtaining current surface roughness parameters of the printing substrate; According to the current surface roughness parameters and the theoretical model, optimized anilox roller parameters suitable for the current surface roughness are determined and output.

7. An improved system for UV matte printing effect, characterized in that: include: Parameter acquisition module, used to obtain the structural parameters of the printing press, paper running path parameters and physical and chemical parameters of UV varnish; A leveling time determination module, for determining the paper movement state parameters between the various color seats and calculating the theoretical leveling time of the UV varnish at different positions based on the structural parameters, paper running path parameters and physical and chemical parameters; A target printing area determination module, used to determine the target printing area where the UV varnish leveling time needs to be extended according to the theoretical leveling time and a preset leveling time threshold; A position distance determination module, used to obtain the specific position of the target printing area and the corresponding motion state parameters, and determine the optimal pre-curing position distance between the UV curing unit and the target printing area based on the specific position and the motion state parameters; A position adjustment module is installed to adjust the position parameters of the UV curing unit according to the optimal pre-curing position distance.

8. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for improving the UV matte printing effect described in any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for improving the UV matte printing effect described in any one of claims 1 to 6 are implemented.

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