阅读说明：本技术 打印固化方法及打印固化系统 (Printing curing method and printing curing system ) 是由 刘晓俊 覃勇 陈卫华 黄明明 于 2019-12-06 设计创作，主要内容包括：本发明公开了一种打印固化方法及打印固化系统,打印固化方法包括：喷墨打印步骤：控制喷墨打印装置在打印位置对打印介质的多个待打印区域喷射油墨。打印介质输送步骤：控制输送装置将已完成喷墨的打印介质从打印位置输送至光照位置。光照固化步骤：控制光固化装置对位于光照位置的打印介质上的所有油墨进行光照固化。本发明打印固化方法及打印固化系统先在打印介质上喷射好油墨,再对所有油墨一起进行光照固化,所有油墨均能够获得足够时间流平及光照固化,保证了油墨在打印介质上具有足够附着力且整体完全固化,使得打印产品品质优良。(The invention discloses a printing and curing method and a printing and curing system, wherein the printing and curing method comprises the following steps: an ink-jet printing step: and controlling the ink jet printing device to jet ink to a plurality of to-be-printed areas of the printing medium at the printing position. A printing medium conveying step: and controlling the conveying device to convey the printing medium with completed ink jetting from the printing position to the lighting position. And (3) light curing: and controlling the light curing device to perform light curing on all the ink on the printing medium positioned at the light position. The printing and curing method and the printing and curing system provided by the invention have the advantages that the printing ink is sprayed on the printing medium, then all the printing ink is cured by illumination, all the printing ink can obtain enough time for leveling and illumination curing, the printing ink has enough adhesive force on the printing medium and is completely cured integrally, and the printed product has excellent quality.)

1. The printing and curing method is characterized by comprising the following steps:

an ink-jet printing step: controlling an inkjet printing device to eject ink to a plurality of to-be-printed areas of a printing medium at a printing position;

a printing medium conveying step: controlling a conveying device to convey the printing medium which finishes ink jetting from the printing position to an illumination position;

and (3) light curing: and controlling a light curing device to perform light curing on all the printing ink on the printing medium positioned at the light position.

2. The print curing method of claim 1, wherein:

the ink jet printing step includes: acquiring a plurality of ink jetting amounts corresponding to a plurality of areas to be printed and a plurality of preset ink amounts of the sum of the ink jetting amounts when ink is jetted, and controlling the ink jet printing device to jet ink to each printing area according to the corresponding ink jetting amounts;

the light curing step comprises the following steps: and acquiring an illumination area corresponding to the area of the printing medium at the illumination position, wherein the light curing device comprises a plurality of curing light sources, and the curing light sources capable of covering the area of the printing medium are controlled to be started to serve as the illumination area for illumination.

3. The print curing method of claim 2, wherein:

the light curing step comprises the following steps: determining the minimum illumination power required for curing the ink with the preset ink amount, determining the average illumination power of each curing light source according to the minimum power, and controlling each curing light source in the illumination area to illuminate with the average illumination power.

4. The print curing method of claim 2, wherein:

the light curing step comprises the following steps: the multiple areas to be printed and the multiple curing light sources are divided into corresponding multiple area groups to be printed and multiple curing light source groups, each curing light source group illuminates the printing ink in the corresponding printing area group, sub-ink-jet quantity is obtained according to the sum of the ink-jet quantity corresponding to each area to be printed in each area group to be printed, sub-illumination power of the corresponding curing light source group is determined according to each sub-ink-jet quantity, and the sub-illumination power is used as the illumination power to control illumination of each curing light source group.

5. The print curing method of claim 2, wherein:

in the medium transporting step, the velocity of the transporting means is determined in accordance with the maximum value among the plurality of the ejected ink amounts.

6. A print curing system, comprising: the system comprises an ink-jet printing device, a light curing device, a conveying device, a raster image processor and a main control board, wherein the main control board is electrically connected with the raster image processor, the ink-jet printing device, the light curing device and the conveying device respectively;

the inkjet printing device comprises a nozzle control board and nozzles, wherein a Raster Image Processor (RIP) is used for converting pictures and texts to be printed into files which can be identified by the inkjet printing device and inputting the files into a main control board, the pictures and texts to be printed are printed in a plurality of areas to be printed of a printing medium, the main control board is electrically connected with the nozzle control board and is used for inputting printing parameters and printing commands obtained after the analysis results, the ink properties and the printing medium properties of the files are integrated into the nozzle control board, the nozzle control board is electrically connected with the nozzles and is used for controlling the nozzles to spray ink on the plurality of areas to be printed at the printing positions according to the printing parameters and the printing commands, the main control board controls the conveying device to convey the printing medium which finishes ink spraying to the illumination position from the printing positions, and the main control board controls the photocuring device to position all the printing medium on the printing medium at the illumination And (5) carrying out light curing on the ink.

7. The print curing system of claim 6, wherein:

the master control board includes china ink volume statistics module and illumination power control module, the light curing device includes a plurality of curing light source, china ink volume statistics module basis cover when printing parameter obtains jet ink a plurality of jet ink volumes that the printing region corresponds and a plurality of jet ink volume sum predetermine the china ink volume, illumination power control module acquires the illumination position corresponding to the illumination region of print media area, a plurality of curing light source that control can cover the printing media area open and carry out the illumination as the illumination region.

8. The print curing system of claim 7, wherein:

the illumination power control module determines the minimum power required for curing the ink with the preset ink amount, and determines the average illumination power of each curing light source according to the minimum power to control each curing light source to illuminate according to the average illumination power as the illumination power.

9. The print curing system of claim 7, wherein:

the multiple areas to be printed and the multiple curing light sources are divided into multiple corresponding printing area groups and multiple corresponding curing light source groups, each curing light source group illuminates the printing ink in the corresponding printing area group, the illumination power control module determines sub ink jet quantity according to the sum of the ink jet quantities corresponding to all the printing areas in the printing area groups, determines sub illumination power of the corresponding curing light source groups according to the sub ink jet quantities, and controls the curing light source groups to illuminate according to the sub illumination power as the illumination power.

10. The print curing system of claim 7, wherein:

the main control board further comprises a speed determining module which calculates the leveling time according to the maximum value of the plurality of ink jet quantities, and determines the speed of the conveying device according to the leveling time so as to control the time for conveying the printing medium which finishes ink jet from the printing position to the illumination position to be equal to the leveling time.

Technical Field

The invention relates to the technical field of ink-jet printing, in particular to a printing and curing method and a printing and curing system.

Background

UV (ultraviolet curing) ink in ink refers to ink which is formed into a film and dried by polymerizing monomers in an ink binder into a polymer by using ultraviolet light with different wavelengths and energies under the irradiation of ultraviolet light. UV inks are inks which have a brilliant color (except in special cases) and good printability. The main components of the UV ink comprise prepolymer, active monomer, initiator, colored pigment and auxiliary agent, and the UV ink with good adsorbability and small shrinkage stress can be obtained by reasonable matching and coordination according to the curing principle and factors influencing the curing shrinkage. UV inks achieve curing effects such as flat curing, good adhesion, overall consistent curing, etc., depending largely on the conditions under which they are photocured.

However, the existing UV ink is printed on a printing medium, and then is cured by opened UV light at once, namely, the UV ink is printed and cured at the same time, so that the poor curing effect, such as the poor curing effect, which is caused by the fact that the UV ink cannot be leveled in time, the adhesion force is insufficient and the local curing is incomplete, is easy to occur, and thus the quality of the printed product is rough and uneven, and the quality of the printed product is poor.

Therefore, it is desirable to provide a printing and curing method and a printing and curing system with good UV curing effect and high quality of printed products.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a printing and curing method, which comprises the following steps: an ink-jet printing step: and controlling the ink jet printing device to jet ink to a plurality of to-be-printed areas of the printing medium at the printing position. A printing medium conveying step: and controlling the conveying device to convey the printing medium with completed ink jetting from the printing position to the lighting position. And (3) light curing: and controlling the light curing device to perform light curing on all the ink on the printing medium positioned at the light position.

Further, the ink jet printing step includes: and acquiring a plurality of ink jet amounts corresponding to a plurality of areas to be printed and a plurality of preset ink amounts of the sum of the ink jet amounts when ink is jetted, and controlling the ink jet printing device to jet ink to each printing area according to the corresponding ink jet amount. The light curing step comprises: the light curing device comprises a plurality of curing light sources, and the curing light sources capable of covering the area of the printing medium are controlled to be started to serve as the light irradiation area to perform light irradiation.

Further, the light curing step comprises: determining the minimum illumination power required by curing the ink with the preset ink amount, determining the average illumination power of each curing light source according to the minimum power, and controlling each curing light source in the illumination area to illuminate at the average illumination power.

Further, the light curing step comprises: the multiple areas to be printed and the multiple curing light sources are divided into corresponding multiple area groups to be printed and multiple curing light source groups, each curing light source group illuminates ink in the corresponding printing area group, sub-ink-jet quantity is obtained according to the sum of ink-jet quantity corresponding to each area to be printed in each area group to be printed, sub-illumination power of the corresponding curing light source group is determined according to each sub-ink-jet quantity, and illumination of each curing light source group is controlled by taking the sub-illumination power as the illumination power.

Further, in the medium transporting step, the velocity of the transporting means is determined according to the maximum value among the plurality of ejected ink amounts.

To achieve another object of the present invention, the present invention also provides a print curing system comprising: the main control board is respectively and electrically connected with the raster image processor, the ink-jet printing device, the light curing device and the conveying device. The ink-jet printing device comprises a nozzle control panel and a nozzle, a Raster Image Processor (RIP) is used for converting pictures and texts to be printed into files which can be identified by the ink-jet printing device and inputting the files into a main control panel, the pictures and texts to be printed are printed to a plurality of areas to be printed of a printing medium, the main control panel is electrically connected with the nozzle control panel and is used for inputting printing parameters and printing commands obtained after the analysis results of the files, the properties of the printing ink and the properties of the printing medium are integrated into the nozzle control panel, the nozzle control panel is electrically connected with the nozzle and is used for controlling the nozzle to jet the printing ink to the plurality of areas to be printed at the printing position according to the printing parameters and the printing commands, the main, and the main control panel controls the light curing device to perform light curing on all the printing ink on the printing medium positioned at the light irradiation position.

Further, the main control panel comprises an ink amount counting module and an illumination power control module, the photocuring device comprises a plurality of curing light sources, the ink amount counting module covers a plurality of ink jet amounts corresponding to a plurality of regions to be printed and a plurality of preset ink amounts of ink jet amount sum when the ink is ejected according to the printing parameters, the illumination power control module acquires an illumination region corresponding to the area of the printing medium at an illumination position, and the plurality of curing light sources capable of covering the area of the printing medium are controlled to be opened to be used as the illumination region for illumination.

Further, the illumination power control module determines the minimum power required for curing the ink with the preset ink amount, and determines the average illumination power of each curing light source according to the minimum power to control each curing light source to illuminate according to the average illumination power as the illumination power.

Furthermore, the multiple areas to be printed and the multiple curing light sources are divided into multiple corresponding printing area groups and multiple corresponding curing light source groups, each curing light source group illuminates ink in the corresponding printing area group, the illumination power control module determines sub-ink-jet amount according to the sum of ink-jet amounts corresponding to all printing areas in each printing area group, determines sub-illumination power of each corresponding curing light source group according to each sub-ink-jet amount, and controls each curing light source group to illuminate according to the sub-illumination power as illumination power.

Further, the main control board further comprises a speed determining module, wherein the speed determining module calculates the leveling time according to the maximum value of the plurality of ink jet quantities, and determines the speed of the conveying device according to the leveling time so as to control the time for conveying the printing medium which finishes ink jet from the printing position to the illumination position to be equal to the leveling time.

The invention has the beneficial effects that: according to the invention, the printing ink is sprayed on the printing medium and then all the printing ink is cured by illumination, so that all the printing ink can obtain enough time for leveling and illumination curing, and the printing ink has enough adhesive force on the printing medium and is completely cured integrally, so that the printed product has excellent quality.

Drawings

FIG. 1 is a schematic flow chart illustrating a printing curing method according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating another embodiment of the printing and curing method according to the present invention;

FIG. 3 is a schematic flow chart of an embodiment of a light curing step corresponding to the print curing method of FIG. 2;

fig. 4 is a schematic flow chart of another embodiment of the light curing step corresponding to the printing curing method of fig. 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Referring to fig. 1, the present invention provides a printing and curing method, in which ink is firstly sprayed onto a printing medium at a printing position, and then the printing medium sprayed with the ink is cured by light irradiation at a light irradiation position, so that it is ensured that all the ink on the printing medium has enough time to level and is cured by light irradiation, and therefore, the adhesion of the ink to the printing medium is large enough, the ink is entirely flat and completely cured, and the printed product has excellent quality. Specifically, the printing and curing method comprises the following steps: inkjet printing step S10: and controlling an ink-jet printing device to jet ink to a plurality of areas to be printed of a printing medium at a printing position, wherein the ink-jet printing device can be a coil printer adopting one pass, a flat-panel printer adopting multiple passes and the like, the printing medium can be a PET (polyethylene terephthalate) film, advertising paper, canvas and the like, and the ink adopts UV (ultraviolet) ink. Generally, according to the graphic information, the whole surface of the printing medium is not sprayed with ink, therefore, the plurality of areas to be printed are the parts of the printing medium which need to be sprayed with ink, when the whole surface of the printing medium needs to be sprayed with ink, the sum of the plurality of areas to be printed is equal to the whole surface area of the printing medium, and in addition, no overlapping area exists between the areas to be printed. The ink ejection is realized by using the ejection control technology of the existing ink jet printing device, belongs to the technical knowledge known by the technical personnel in the field, and is not described in detail herein.

The print curing method further includes a print medium conveying step S20: and controlling a conveying device to convey the printing medium subjected to ink jet from the printing position to the illumination position, wherein the conveying device can be a conveying belt, a transfer disc and the like, and in order to relatively fix the printing medium and the conveying device, a plurality of air suction holes communicated with a vacuum device are formed in the conveying device, and each air suction hole is used for adsorbing and fixing the printing medium on the conveying device. Preferably, after the printing medium is subjected to ink jetting, the printing medium can be kept at the printing position for a period of time to completely level the ink, or the ink can be completely leveled in the process of conveying the printing medium, so that the ink with uniform ink layer thickness and no wrinkles is provided for the subsequent steps.

The print curing method further includes a light curing step S30: and controlling a light curing device to perform light curing on all the ink on the printing medium at the light position, wherein the light curing device comprises a plurality of UV-LED lamps or a plurality of UV mercury lamps, and preferably the UV-LED lamps are adopted. It can be known that the light curing device is arranged opposite to the printing medium at the illumination position, and the curing light emitted by the light curing device covers the whole printing surface of the printing medium, and the illumination curing time period can be set to a certain fixed time period of, for example, three minutes, as long as a person skilled in the art can determine that the fixed time period is enough to completely cure the ink according to the knowledge of ordinary skill in the art.

In summary, in the printing and curing method of the present invention, the ink is firstly ejected to the plurality of areas to be printed on the printing medium corresponding to the graphic and text information to be displayed in the inkjet printing step S10, and then the printing medium is transported to the illumination position by the transportation device so as to be cured by the light curing device. The technical defects of uneven ink layer thickness, wrinkling, insufficient adhesive force and incomplete local curing caused by insufficient leveling of the ink due to the fact that the ink is printed and cured at the same time in the prior art are avoided, and the technical effects of good ink curing effect and high quality of printed products are achieved.

Referring to fig. 2, in order to improve the light irradiation pertinence and efficiency of the light curing device, it is preferable that the inkjet printing step S10' includes: and acquiring a plurality of ink jet amounts corresponding to a plurality of areas to be printed and a plurality of preset ink amounts of the sum of the ink jet amounts when ink is jetted, and controlling the ink jet printing device to jet ink to each printing area according to the corresponding ink jet amount. As for one method for obtaining the above ink jet amount (as will be described in detail below), a raster image processor RIP electrically connected to a main control board is used to convert an image and text to be printed into a document that can be recognized by an ink jet printing apparatus and input the document into the main control board, the main control board is electrically connected to a nozzle control board and is used to input a printing parameter and a printing command obtained by integrating a document analysis result, an ink property, and a printing medium property into the nozzle control board, the nozzle control board is connected to a nozzle and controls the nozzle to jet ink according to the printing parameter and the printing command, the printing parameter includes an ink jet amount, and the ink jet amount is related to a nozzle size and density, an image resolution, a humidity of the printing medium, and ink permeability, and generally is 10 ×^-4ml/cm²And therefore, the main control board extracts each ink jet amount corresponding to each area to be printed through the printing parameters and further calculates to obtain the preset ink amount. The illumination curing step S30 'includes acquiring an illumination area corresponding to the area of the printing medium at the illumination position, and the illumination curing device includes a plurality of curing light sources, it should be understood that the illumination range generated by turning on all the curing light sources can cover the printing medium with the largest area in the inkjet printing step S10'. Specifically, the illumination position and the printing position can be provided with corresponding coordinate systems, so that the corresponding coordinate values of the printing medium at the illumination position can be further obtained by controlling the coordinate values of the printing medium obtained when the nozzle is controlled to eject ink to the printing medium, and in this way, the control can cover the area of the printing medium according to the difference of the area sizes of the printing mediumThe corresponding curing light source is started to be used as an illumination area for illumination, namely the illumination area is equivalent to the area occupied by the curing light source in the starting state, the illumination power of the started curing light source is set according to the properties of the printing medium such as absorptivity and saturation of the printing medium to the printing ink, the cohesiveness and permeability of the printing ink, and other curing light sources are closed, so that the power consumption is saved, and the service life of the curing light source is correspondingly prolonged.

Referring to fig. 3, further, as a preferred embodiment of the light curing step, the light curing step S30 ″ includes: the minimum light power required to cure a predetermined amount of ink is determined, for example, since the amount of ink jetted is generally 10X 10^-4ml/cm²Therefore, in the case where the preset ink amount and the area of the printing medium are known, the actual ink ejection amount per unit area can be obtained by dividing the preset ink amount by the area of the printing medium, and if the actual ink ejection amount is less than 10 × 10^-4ml/cm²The amount of ink ejected is 10X 10^-4ml/cm²Further determining the minimum light power if the actual ink jet amount is larger than 10 × 10^-4ml/cm²And further determining the minimum illumination power according to the actual ink jet amount, determining the average illumination power of each curing light source according to the minimum illumination power, and controlling each curing light source in the illumination area to illuminate at the average illumination power, wherein the average illumination power is obtained by dividing the minimum illumination power by the number of each curing light source in the illumination area. Therefore, the starting and the illumination power of the curing light source are more targeted, the power consumption is further reduced while the excellent curing effect is ensured, and the illumination power of the corresponding curing light source is controlled according to the same power, so that the method is relatively simpler.

Referring to fig. 4, further, as another preferred embodiment of the light curing step, the light curing step S30' ″ includes: the plurality of areas to be printed and the plurality of curing light sources are divided into a plurality of corresponding area groups to be printed and a plurality of curing light source groups, the specific numerical values of the plurality of areas to be printed and the plurality of curing light sources can be determined according to actual conditions, generally speaking, the larger the number of the divided groups is, the more accurate the control on the starting and the power of the curing light sources is, but the more complicated the control program is. And each curing light source group illuminates the ink in the corresponding to-be-printed area group, the sub-ink-jet quantity is obtained according to the sum of the ink-jet quantities corresponding to the printing areas in each printing area group, the sub-illumination power of the corresponding curing light source group is determined according to the sub-ink-jet quantities, and the sub-illumination power is used as the illumination power to control the illumination of each curing light source group. Therefore, not only the curing light source corresponding to the printing area is turned on and the illumination power of the turned-on curing light source is adjusted corresponding to the ink jet amount, the efficiency of ink illumination curing is high and the effect is good, but the illumination power of each curing light source is dynamically adjusted, so that the control of the illumination power of each curing light source is relatively complex.

In addition, in order to realize that the printing medium is irradiated and cured in the irradiation and curing step S30 'through the printing medium conveying step S20 immediately after the inkjet printing step S10' is completed, and at the same time, to ensure that the ink has enough time to level so that the ink layer thickness is uniform and does not wrinkle, preferably, in the medium conveying step S20, the speed of the conveying device is determined according to the maximum value among a plurality of ink jet amounts, the maximum leveling time period is determined according to the ink energy leveling satisfying the maximum ink jet amount value, the inks of other ink jet amounts can also level, the maximum leveling time period can be determined by a person skilled in the art according to the properties of the inks, such as adhesion, permeability and the like, the leveling time period is generally 1 to 10 seconds, and the speed of the conveying device can be calculated under the condition that the printing position and the irradiation position can be determined.

The present invention also provides a printing and curing system (not shown) capable of applying any of the above printing and curing methods, and for the repeated content described in the above printing and curing methods, it can be understood by reference, and the details are not described below. The printing curing system includes: the ink-jet printing device, the light curing device, the conveying device, the grating image processor and the main control board are arranged in the ink-jet printing device, the light curing device and the conveying device can be integrally arranged in an integral device, the grating image processor and the main control board are also arranged in the integral device, in addition, the ink-jet printing device, the light curing device and the conveying device can also be respectively arranged independently in a split mode and are connected through cables, and the grating image processor and the main control board are arranged in the ink-jet printing device or the light curing device. The main control board is respectively and electrically connected with the raster image processor, the ink-jet printing device, the light curing device and the conveying device. The main control board is provided with a processor such as a CPU or a PLC, and it is understood that each module included in the main control board described below is provided in the processor. The ink-jet printing device comprises a nozzle control panel and a nozzle, a Raster Image Processor (RIP) is used for converting pictures and texts to be printed into files which can be identified by the ink-jet printing device and inputting the files into a main control panel, the pictures and texts to be printed are printed to a plurality of areas to be printed of a printing medium, the main control panel is electrically connected with the nozzle control panel and is used for inputting printing parameters and printing commands obtained after the analysis results of the files, the properties of the printing ink and the properties of the printing medium are integrated into the nozzle control panel, the nozzle control panel is electrically connected with the nozzle and is used for controlling the nozzle to jet the printing ink to the plurality of areas to be printed at the printing position according to the printing parameters and the printing commands, the main, and the main control panel controls the light curing device to perform light curing on all the printing ink on the printing medium positioned at the light irradiation position. Therefore, the printing and curing method of the invention utilizes the ink-jet printing device to complete the ink-jet of the whole printing medium firstly and then complete the illumination curing of the whole printing medium, and the ink has enough time to flow and level after the ink-jet is completed and in the conveying process of the conveying device, so that the ink layer of the ink cured by the illumination of the illumination curing device has uniform thickness and does not wrinkle, thereby ensuring that the adhesive force between the ink and the printing medium is large and the whole curing is complete, and further obtaining excellent printing product quality.

Further, the main control board comprises an ink amount counting module and an illumination power control module, the photocuring device comprises a plurality of curing light sources, the ink amount counting module obtains a plurality of ink jet amounts corresponding to a plurality of areas to be printed and a plurality of preset ink amounts of the sum of the ink jet amounts according to the printing parameters when the ink is ejected, the ink jet amounts correspond to the ink drop volumes to be leveled and cured in unit areas of the areas to be printed, and the ink jet amounts are generally 10 × 10^-4ml/cm²Left and right, illumination power control module acquisitionIn the illumination area where the illumination position corresponds to the area of the printing medium, the illumination power control module stores a plurality of pre-stored ink jet amounts (the numerical range is larger than the ink jet amount of the area to be printed), the power of each curing light source and corresponding functions of the pre-stored ink jet amounts and the power of the curing light sources, wherein the corresponding functions determine the corresponding relationship between the ink jet amount and the power of the curing light sources, namely the number of the curing light sources which are turned on and the illumination power, and it is understood that the illumination power of the curing light sources can be adjusted within a certain numerical. In addition, the plurality of curing light sources are preferably divided into 3 types corresponding to 3 wavelengths, the 3 wavelengths are respectively a wavelength which is absorbed by cyan ink, a wavelength which is absorbed by magenta ink and a wavelength which is absorbed by yellow ink, cyan, magenta and yellow are basic colors of color inkjet printing, cyan, magenta and yellow are also three primary colors of art, and other colors can be indirectly obtained by mixing the three colors, so that the wavelengths which are absorbed by the three basic color inks are set so that the inks of various colors can be cured well. The illumination power control module determines the specific number of curing light sources capable of covering the area of the printing medium and the corresponding illumination power according to the corresponding function, so that the curing light sources and the corresponding illumination power are controlled to be started to serve as an illumination area for illumination. The corresponding illumination power is determined by a person skilled in the art according to the common technical knowledge in the art to realize the complete curing of the ink and actually set, in this case, a part of the plurality of curing light sources is turned on and a part of the plurality of curing light sources is turned off, so that the power consumption is saved, and the influence on the surface color vividness of the ink surface of some areas to be printed due to the fact that the surface of the ink surface receives too much illumination is correspondingly avoided.

Preferably, the illumination power control module further stores a plurality of pre-stored ink amounts (the numerical range is larger than the preset ink amount), power of each curing light source and corresponding functions of the pre-stored ink amount and the power of each curing light source, determines the minimum power required for curing the ink of the preset ink amount according to the corresponding functions, and determines the average illumination power of each curing light source according to the minimum power to control each curing light source to perform illumination according to the average illumination power as the illumination power. In this case, not only are the curing light sources selectively turned on and off, but the turned-on curing light sources are controlled at the same average illumination power based on the lowest power, which is relatively simple to control, and further ensures that the ink in certain areas to be printed does not receive excessive illumination.

Preferably, the multiple areas to be printed and the multiple curing light sources are divided into corresponding multiple printing area groups and multiple curing light source groups, each curing light source group illuminates the ink in the corresponding printing area group, the illumination power control module determines the sub-ink-jet amount according to the sum of the ink-jet amounts corresponding to all the printing areas in each printing area group, it is known that the numerical range of the pre-stored ink-jet amount stored by the illumination power control module is larger than each sub-ink-jet amount, correspondingly, the corresponding function establishes the mapping relationship between each sub-ink-jet amount and each corresponding curing light source power, thereby establishing the mapping relationship between each sub-ink-jet amount and the sub-illumination power as the sum of the corresponding curing light source power, the illumination power control module can determine the sub-illumination power of each corresponding curing light source group according to each sub-ink-jet amount by using the mapping relationships, thereby controlling each curing light source group to illuminate as the illumination power, each curing light source in the curing light source group can be illuminated by the power obtained by dividing the sub-illumination power by the number of the curing light sources in the curing light source group. Under the condition, the illumination power of the curing light source which is selectively started is more accurately adjusted, so that the method is particularly suitable for the printing ink which is sensitive to the illumination power, and the high quality of the printed product is ensured.

In addition, the illumination power control module can be further configured to have a function of counting the mean square error of each ink jet amount, if the mean square error does not exceed the threshold of the ink jet amount, the corresponding curing light source is controlled to illuminate according to the average illumination power, and if the mean square error exceeds the threshold of the ink jet amount, the corresponding curing light source group is controlled to illuminate according to the sub-illumination power. Therefore, different illumination power control modes of the curing light source are selected according to the difference degree of the ink jet quantity, the illumination of the ink layer is pointed, the ink layer is ensured to obtain proper illumination, frequent adjustment of the illumination power of the curing light source can be avoided, and the service life of the curing light source is prolonged.

As a further improvement, the main control board further includes a rate determining module, which calculates a leveling time period according to a maximum value of the plurality of ink jet amounts, and determines a rate of the transporting device according to the leveling time period, so as to control a time period for transporting the printing medium, which has completed ink jetting, from the printing position to the illumination position to be equal to the leveling time period, that is, the rate of the transporting device is obtained by dividing a distance between the printing position and the illumination position by the leveling time period. Like this, printing ink has enough time levelling to make printing ink layer thickness even and not corrugate, and then the illumination that the ink layer obtained is also even, and upper and lower two-layer all obtains good illumination solidification, has guaranteed the product quality, and has improved the whole work efficiency of printing curing system.

It should be emphasized that the above detailed description of the illumination power control of the curing light source is not specific to the illumination duration of the curing light source, so that under the condition that the illumination duration can be easily determined according to the time consumption of the illumination curing process, the good curing of the ink can be satisfied by controlling the illumination power, and in addition, since the product of the illumination power and the illumination duration is the illumination power and the energy required by the ink curing have a corresponding relationship, those skilled in the art can easily know the corresponding setting and control of the illumination duration according to the above-described technical teaching of various illumination power control modes, and the present invention is not particularly limited, and does not limit the protection scope of the present invention.

A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps, or perform several steps simultaneously, after comprehending the spirit of the present invention.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.