CN111791582B

CN111791582B - Printing ink color matching system of digital printing machine

Info

Publication number: CN111791582B
Application number: CN202010635971.9A
Authority: CN
Inventors: 李鑫坤; 秦建军
Original assignee: Sichuan Shijizhicai Printing And Packaging Co ltd
Current assignee: Sichuan Shijizhicai Printing And Packaging Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-11-23
Anticipated expiration: 2040-07-03
Also published as: CN111791582A

Abstract

The invention relates to an ink color matching system of a digital printing machine, which belongs to the technical field of digital printing or the technical field of green printing, is used for providing single-color ink for a printing mechanism of the digital printing machine and comprises four primary color ink tanks, a flushing water tank, an air pump and a stirring mechanism, wherein the four primary color ink tanks respectively correspond to CMYK; the bottom of each primary color ink box is respectively provided with an electromagnetic valve and a peristaltic pump, the electromagnetic valves and the peristaltic pumps are in parallel connection, the output sides of the electromagnetic valves at the bottom of each primary color ink box are communicated to a collecting pipe, the collecting pipe is connected with a plurality of branch valves through four-way pipes or five-way pipes, the outlets of the branch valves are connected with branch pipes, and the outlets of the branch pipes extend to the upper parts of the corresponding monochromatic ink boxes; the automatic color matching of the automatic digital printing machine can be realized, and meanwhile, the structure can ensure that the ink cannot flow in a pipeline and cannot be blocked due to the solidification of the ink through the design of the air pump; after printing is finished, the flushing water tank is flushed, and adverse effects of ink remaining in the ink box can be avoided.

Description

Printing ink color matching system of digital printing machine

Technical Field

The invention relates to an ink color matching system of a digital printing machine, and belongs to the technical field of digital printing or green printing.

Background

The digital printing is a novel printing technology for directly transmitting the image information to a digital printing machine through a network by utilizing a prepress system; the digital printing system mainly comprises a prepress system and a digital printer. Some systems also incorporate stapling and cutting equipment. The working principle is that the operator outputs the digital information of the original manuscript or the digital medium or the network digital file received from the network system to the computer, the digital information is created, modified and arranged on the computer to become the digital information which is satisfied by the customer, the digital information is processed by RIP to become the corresponding monochrome pixel digital signal which is transmitted to the laser controller, the corresponding laser beam is emitted, and the printing roller is scanned. The printing cylinder made of photosensitive material is photosensitive to form the picture and text capable of adsorbing ink or toner, and then the picture and text are transferred to the printing stock such as paper.

When the printing machine is used, color matching is often needed for needed colors, the existing color matching is generally performed by using manual color mixing, experienced technical workers are needed, a large amount of time is consumed, and color deviation is easily caused, so that the problem of urgent need is solved by how to realize automatic color matching of the digital printing machine.

Disclosure of Invention

The invention aims to solve the problems and designs the automatic color matching structure to realize automatic color matching of the automatic digital printing machine, and meanwhile, the structure can ensure that the ink cannot flow in a pipeline and cannot be blocked due to ink solidification through the design of an air pump; after printing is finished, the ink box can be flushed through the flushing water tank, and the adverse effect of ink residue in the ink box can be avoided.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an ink color matching system of a digital printing machine is used for providing single-color ink for a printing mechanism of the digital printing machine and comprises four primary color ink tanks, a flushing water tank, an air pump and a stirring mechanism, wherein the four primary color ink tanks respectively correspond to CMYK; the printing mechanism comprises a surface dryer, a monochromatic ink box, a scraping plate, an ink fountain roller, an anilox roller, a printing plate cylinder and an impression cylinder, wherein printing ink is arranged in the monochromatic ink box, the lower part of the ink fountain roller is immersed in the printing ink, and the scraping plate is attached to one side of the ink fountain roller and used for uniformly scraping the ink on the ink fountain roller; the anilox roller is arranged on the oblique upper side of the ink duct roller and is used for transferring ink to the printing plate cylinder, and the printing plate cylinder prints the ink on the flexible surface paper when the flexible surface paper passes through the space between the printing plate cylinder and the impression cylinder; a surface dryer is arranged on the output side of the impression cylinder and is used for quickly drying the ink on the surface of the flexible facial tissue; the bottom of each primary color ink box is respectively provided with an electromagnetic valve and a peristaltic pump, the electromagnetic valves and the peristaltic pumps are in parallel connection, the output sides of the electromagnetic valves at the bottom of each primary color ink box are communicated to a collecting pipe, the collecting pipe is connected with a plurality of branch valves through four-way pipes or five-way pipes, the outlets of the branch valves are connected with branch pipes, and the outlets of the branch pipes extend to the upper parts of the corresponding monochromatic ink boxes; the stirring mechanism is used for uniformly stirring the ink cartridges in the single-color ink cartridges; the bottom of the flushing water tank is communicated with the collecting pipe through an electromagnetic valve, the air pump is connected with the collecting pipe, and when the primary color ink tank conveys ink to the monochromatic ink box in advance, the air pump is started all the time to push the ink in the collecting pipe and the branch pipe to move.

Preferably, the stirring mechanism comprises a stirring blade, an electromagnetic stirrer and a linear motion module; the monochrome ink box is in a long groove shape with an opening at the upper part, the stirring blade is arranged in the monochrome ink box, the electromagnetic stirrer is positioned under the monochrome ink box and arranged on the linear motion module, the linear motion module can drive the electromagnetic stirrer to move along the length direction of the monochrome ink box, and the electromagnetic stirrer can be in magnetic fit with the stirring blade in the monochrome ink box and drive the stirring blade to rotate and drive the stirring blade to move in the length direction of the monochrome ink box.

Preferably, color sensors are respectively arranged above the single-color ink boxes, and each color sensor is used for acquiring ink color information in the corresponding single-color ink box and controlling the opening and closing of an electromagnetic valve or a peristaltic pump at the bottom of each primary-color ink box.

Preferably, a discharge valve for discharging ink or a flushing liquid in the monochrome ink cartridge is provided on a side surface of the monochrome ink cartridge.

Preferably, the digital printing machine further comprises a feeding mechanism for conveying the flexible facial tissue to be printed, a dust removing mechanism for removing dust on two sides of the flexible facial tissue and making the surface of the flexible facial tissue rough, a deviation correcting mechanism for adjusting the position of the flexible facial tissue in the width direction, a humidifying mechanism capable of wetting the flexible facial tissue to make the humidity of the flexible facial tissue uniform and reach the standard, a drying mechanism for drying the flexible facial tissue, and a material receiving mechanism for receiving the printed flexible facial tissue; the feeding mechanism, the deviation correcting mechanism, the humidifying mechanism, the multiple groups of printing mechanisms, the drying mechanism and the material receiving mechanism are sequentially arranged.

Preferably, the digital printing machine further comprises a tension control mechanism, wherein the tension control mechanism comprises a first tension control roller and a second tension control roller, the first tension control roller is arranged between the deviation rectifying mechanism and the humidifying mechanism, the second tension control roller is arranged between the printing mechanism and the drying mechanism, and the first tension control roller and the second tension control roller can move along the thickness direction of the facial tissue to control and adjust the flexible tension.

Preferably, the drying mechanism comprises a transmission roller and a plurality of drying electric heating plates, the drying electric heating plates are arranged below the transmission roller, every two of the plurality of drying electric heating plates form a group, and the two drying electric heating plates in each group respectively dry two sides of the flexible facial tissue.

Preferably, the dust removing mechanism comprises a dust removing fan and two dust removing brush rolls, the flexible tissue passes through the tangent positions of the two dust removing brush rolls, and the two dust removing brush rolls are respectively driven by the corresponding dust removing motors and rotate along the moving direction of the flexible tissue; the dust removal fan is arranged at the top of the dust removal chamber and blows air downwards; the dust removal brush roll is provided with a plurality of dust removal brush hairs including long tubulose dust removal roll body on the dust removal roll body outside global, is provided with a plurality of air vents on the dust removal roll body, is provided with the air-blowing chamber in the dust removal roll body, is provided with the rachis in the air-blowing chamber, is provided with a plurality of air-blast blades on the rachis, the rachis makes the air-blast blade blast air and utilize the air-blast air current to remove dust to flexible facial tissue through the air vent on the dust removal roll body with the rotation direction or the rotational speed difference of dust removal roll body.

Preferably, the end part of the blade shaft is connected with a planetary wheel set, the blade shaft drives the dust removing roller body to rotate through the planetary wheel set, and the rotating speed of the dust removing roller body and the blade shaft is 10: 1.

The invention has the beneficial effects that:

1. according to the scheme, automatic color matching of the automatic digital printing machine can be realized, and meanwhile, the structure can ensure that ink cannot flow in a pipeline in a winding manner and cannot be blocked due to solidification of the ink through the design of the air pump; after printing is finished, the ink box can be flushed through the flushing water tank, so that the adverse effect of ink residue in the ink box can be avoided;

2. according to the color matching structure of the ink, the CMYK value of the ink can be effectively controlled in the color matching process of the ink through the feedback control of the color sensor, so that a better printing effect is achieved;

3. the surface dryer is arranged on the front side of the printing mechanism in the scheme, only the area where the printed pattern is located is covered by the surface dryer, so that the adhesion of printing ink on the facial tissue can be ensured, and on the other hand, the influence of the dryer on the humidity of the facial tissue is reduced;

4. in addition, the disclosed digital printing machine of this scheme, humidification mechanism can carry out the humidification to corrugated paper facial tissue, guarantees that the facial tissue is more balanced at the ascending humidity of width direction to make the infiltration degree of the medium of printing ink on the facial tissue lower and more even, guarantee the colour mixture degree of consistency of printing ink and facial tissue base colour, improve printing quality.

Drawings

FIG. 1 is a diagram of an example ink color matching system configuration;

FIG. 2 is a view showing an example of a structure of a printing mechanism;

FIG. 3 is a diagram showing an exemplary structure of a printing apparatus according to the present embodiment;

FIG. 4 is a diagram illustrating a structure of a deviation correcting mechanism;

FIG. 5 is a view showing an example of a structure in which two dust-removing brush rollers are engaged;

FIG. 6 is a cross-sectional view of a single dust brush roll;

FIG. 7 is a view showing an exemplary configuration of a printing adjusting mechanism;

reference numerals: 1-feeding mechanism, 2-dust removing chamber, 201-dust removing fan, 202-dust removing brush roller, 203-dust removing brush, 204-dust removing roller body, 205-air blowing cavity, 206-air blowing blade, 207-first intermediate gear, 208-second intermediate gear, 3-adjusting control chamber, 301-deviation rectifying roller, 302-deviation rectifying slide seat, 303-supporting roller frame, 304-first tension control roller, 4-humidifying chamber, 401-intermediate roller, 402-water vapor generator, 403-partition plate, 5-printing chamber, 501-primary color ink tank, 502-flushing water tank, 503-air pump, 504-electromagnetic valve, 505-peristaltic pump, 506-branch valve, 507-stirring blade, 508-color sensor and 509-discharge valve, 510-electromagnetic stirrer, 511-linear motion module, 6-drying chamber, 601-second tension control roller, 602-drying electric hot plate, 7-printing adjusting mechanism, 701-adjusting roller, 702-lifting seat, 703-sliding sleeve, 704-guide rod, 705-base, 706-lifting motor, 8-conveying belt, 9-printing mechanism, 901-surface drier, 902-monochrome ink box, 903-scraper, 904-ink fountain roller, 905-anilox roller, 906-plate roller, 907-impression roller and 10-material receiving mechanism.

Detailed Description

As shown in the attached drawings, the corrugated board facial tissue printing device based on the digital printing technology comprises a feeding mechanism 1, a receiving mechanism 10 and a cabinet, wherein a dust removal chamber 2, an adjustment control chamber 3, a humidification chamber 4, a printing chamber 5 and a drying chamber 6 which are arranged from left to right are respectively arranged in the cabinet along the printing direction; the feeding mechanism 1 and the receiving mechanism 10 are used for receiving flexible facial tissue before and after printing respectively.

A dust removing fan 201 and two dust removing brush rolls 202 are arranged in the dust removing chamber 2, flexible facial tissue passes through the tangent positions of the two dust removing brush rolls 202, and the two dust removing brush rolls 202 are respectively driven by corresponding dust removing motors and rotate along the moving direction of the flexible facial tissue; the dust removing fan 201 is provided at the top of the dust removing chamber 2 and blows air downward.

Simultaneously, in order to further improve the effect of removing dust, reduce the influence of adnexed dust on the dust removal brush roll 202 to flexible facial tissue dust removal effect, carried out following optimization to the structure of dust removal brush roll 202: the dust removing brush roll 202 comprises a dust removing roll body 204, dust removing bristles 203, a blade shaft, a planetary wheel set and other structures, wherein the dust removing roll body 204 is in a long tube shape, the dust removing bristles 203 are attached to the outer peripheral surface of the dust removing roll body 204, the dust removing roll body 204 is provided with a plurality of air vents capable of being communicated with an air blowing cavity 205 in the dust removing roll body 204, the blade shaft is arranged in the air blowing cavity 205, and the blade shaft is provided with a plurality of air blowing blades 206; the end part of the blade shaft is provided with a planetary gear set which is connected between the blade shaft and the dust removal roller body 204, the blade shaft drives the dust removal roller body 204 to rotate through the planetary gear set, the rotating speeds of the blade shaft and the dust removal roller body 204 are different, the rotating speed ratio is 10:1, at the moment, the air blowing blade 206 can blow air to the flexible facial tissue through the air vent on the dust removal roller body 204, not only dust removal can be carried out on the flexible facial tissue, but also dust attached to the dust removal roller body 204 can be removed; in addition, the planetary gear set may further include two-step intermediate wheels, which are respectively the first intermediate gear 207 and the second intermediate gear 208, and the blade shaft drives the dust removing roller 204 to rotate through the first intermediate gear 207 and the second intermediate gear 208, so that the rotation directions of the dust removing roller 204 and the blade shaft are opposite, and the blowing speed of the blowing blade 206 is increased.

A deviation rectifying mechanism and a first tension control roller 304 are arranged in the adjusting control chamber 3, the deviation rectifying mechanism comprises a deviation rectifying roller 301, a deviation rectifying slide base 302 and a supporting roller frame 303, the deviation rectifying slide base 302 is fixed on the side wall of the adjusting control chamber 3, the supporting roller frame 303 is arranged on the deviation rectifying slide base 302 and is in sliding fit with the deviation rectifying slide base 302, the two deviation rectifying rollers 301 are arranged on the supporting roller frame 303, during printing, the deviation rectifying roller 301 is supported below the flexible facial tissue and is driven by the supporting roller frame 303 to move along the width direction of the flexible facial tissue so as to finish the deviation rectifying of the flexible facial tissue in the width direction, a telescopic device can be arranged on the supporting roller frame 303, and the telescopic device is used for controlling the movement; the first tension control roller 304 is disposed on the obliquely lower side of the skew correction mechanism, and the first tension control roller 304 is movable in a direction perpendicular to the page of the flexible face paper.

A middle roller 401 is arranged in the humidifying chamber 4, partition boards 403 are respectively arranged above and below the middle roller 401, the left side and the right side of the humidifying chamber 4 are divided into a steam chamber and a cooling chamber by the partition boards 403, a water vapor generator 402 is arranged in the steam chamber, and the flexible facial tissue enters the printing chamber 5 after being humidified by the steam chamber and naturally cooled by the cooling chamber; humidification chamber 4 mainly used utilizes steam infiltration flexible facial tissue, thereby the infiltration of printing ink to flexible facial tissue when reducing the printing, cause the phenomenon that the base colour and the printing ink colour of flexible facial tissue mix, earlier utilize the vapor in who's steam chamber to attach the vapor on the flexible facial tissue, then in the cooling chamber, make the vapor on the flexible facial tissue become the water droplet, thereby make the inside moisture infiltration that can be soaked of flexible facial tissue, flexible facial tissue after the infiltration is when the printing, the thickness direction infiltration of solvent along flexible facial tissue that can reduce printing ink, thereby make printing ink can float in the surface of flexible facial tissue, thereby reduce printing ink in the colour mixture degree of base colour, improve the printing effect.

A plurality of printing mechanisms 9 are arranged in the printing chamber 5, each printing mechanism 9 can print different colors, each printing mechanism 9 comprises a surface dryer 901, a monochromatic ink box 902, a scraper 903, an ink duct roller 904, an anilox roller 905, a plate cylinder 906, an impression cylinder 907 and the like, printing ink is arranged in the monochromatic ink box 902, the lower part of the ink duct roller 904 is immersed in the printing ink, and the scraper 903 is attached to one side of the ink duct roller 904 and is used for scraping the ink on the ink duct roller 904; anilox roll 905 is disposed on the diagonally upper side of duct roll 904 and is used to transfer ink to plate cylinder 906, and plate cylinder 906 prints ink onto the flexible cover paper as it passes between plate cylinder 906 and impression cylinder 907; a surface dryer 901 is provided on the output side of the impression cylinder 907, and the surface dryer 901 can dry the ink on the surface of the flexible tissue paper quickly, so as to avoid the ink fading in the subsequent conveying process.

In addition, an ink color matching system is arranged above the printing chamber 5; the ink color matching system comprises four primary color ink tanks 501, a flushing water tank 502, an air pump 503 and a stirring mechanism which respectively correspond to four primary colors of CMYK, wherein the bottom of each primary color ink tank 501 is respectively provided with an electromagnetic valve and a peristaltic pump 505, the electromagnetic valves and the peristaltic pumps 505 are in parallel connection, the output sides of the electromagnetic valves at the bottoms of the primary color ink tanks 501 are respectively communicated to a collecting pipe, the collecting pipe is connected with a plurality of branch valves 506 through four-way pipes or five-way pipes, the outlets of the branch valves 506 are connected with the branch pipes, and the outlets of the branch pipes extend to the upper parts of corresponding single-color ink tanks 902; the stirring mechanism is used for uniformly stirring the ink cartridges in the monochromatic ink cartridges 902; the bottom of the flushing water tank 502 is communicated with a collecting pipe through an electromagnetic valve, the air pump 503 is connected with the collecting pipe, and when the primary color ink tank 501 sequentially conveys ink to the monochromatic ink box 902, the air pump 503 is always started to push the ink in the collecting pipe and the branch pipe to move; the stirring mechanism comprises a stirring blade 507, an electromagnetic stirrer 510 and a linear motion module 511; the monochrome ink box 902 is in a long groove shape with an opening at the upper part, the stirring blade 507 is arranged in the monochrome ink box 902, the electromagnetic stirrer 510 is positioned under the monochrome ink box 902 and is arranged on the linear motion module 511, the linear motion module 511 can drive the electromagnetic stirrer 510 to move along the length direction of the monochrome ink box 902, and the electromagnetic stirrer 510 can be magnetically matched with the stirring blade 507 in the monochrome ink box 902 and drive the stirring blade 507 to rotate and drive the stirring blade 507 to move along the length direction of the monochrome ink box 902; when the ink color matching system is used, the controller calculates the amount of ink injected into each monochromatic ink box 902 by the primary color ink tank 501, then the electromagnetic valve at the bottom of the primary color ink tank 501 is controlled to be opened, different branch valves 506 are opened in sequence, meanwhile, the air flow of the air pump 503 is used for pushing the ink to enter different monochromatic ink boxes 902, and then the other primary color ink tank 501 is switched to add the ink to each monochromatic ink box 902; the air flow can ensure that no ink is left in the collecting pipeline and the branch pipeline; after the ink in the primary color ink tank 501 is mixed into the monochromatic ink cartridge 902 according to different proportions, the electromagnetic stirrer 510 and the linear motion module 511 are started to make the air blowing blade 206 reciprocate and stir the ink in the monochromatic ink cartridge 902; the color sensor 508 collects the color of the mixed ink, if a primary color ink needs to be supplemented, the controller starts the peristaltic pump 505 below the corresponding primary color ink tank 501, and pushes the ink into the corresponding monochromatic ink cartridge 902 by using the air pump 503, so that the printing ink to be obtained can be obtained repeatedly; when printing is completed, the flushing water tank 502 is opened, the pipe between the primary color ink tank 501 and the monochrome ink cartridge 902 are flushed with a flushing liquid, and then the discharge valve 509 is opened to discharge, thereby avoiding the influence of residual solidification of ink in the pipe or the monochrome ink cartridge 902.

Color sensors 508 are respectively arranged above the single-color ink cartridges 902, and each color sensor is used for acquiring the color information of the ink in the corresponding single-color ink cartridge 902 and controlling the opening and closing of an electromagnetic valve or a peristaltic pump 505 at the bottom of each primary-color ink tank 501; a discharge valve 509 is provided on the side of the monochrome ink cartridge 902, and the discharge valve 509 is used to discharge ink or a rinse liquid in the monochrome ink cartridge 902.

A second tension control roller 601 and a drying mechanism are arranged in the drying chamber 6, the drying mechanism includes a transmission roller and a plurality of drying electric heating plates 602, the drying electric heating plates 602 are arranged below the transmission roller, every two of the plurality of drying electric heating plates 602 form a group, and the two drying electric heating plates 602 of each group respectively dry two sides of the flexible facial tissue.

A printing adjusting mechanism 7 is arranged at the front side of the printing mechanism 9, and the printing adjusting mechanism 7 comprises an adjusting roller 701, a lifting seat 702, a sliding sleeve 703, a guide rod 704, a base 705 and a lifting motor 706; the adjusting roller 701 is transversely arranged on the lifting seat 702 and can rotate, a plurality of guide rods 704 which are vertically arranged are arranged on the base 705, the lifting seat 702 is connected with the guide rods 704 through a sliding sleeve 703, a lifting motor 706 is connected between the lifting seat 702 and the base 705 and is used for controlling the lifting of the lifting seat 702, the flexible facial tissue passes through the adjusting roller 701 and deflects the feeding direction at the adjusting roller 701, and the printing position of the flexible facial tissue along the feeding direction can be controlled when the adjusting roller 701 is lifted.

A conveyer belt 8 is arranged among the dust removing mechanism, the intermediate roller 401, the printing mechanism 9, the second tension control roller 601 and the drying mechanism, and the conveyer belt 8 can circularly convey the flexible facial tissue.

When the dust removing device is used, one end of flexible facial tissue is sent to the conveying belt 8 of the machine body by the feeding mechanism, the flexible facial tissue reaches the position of the dust removing roller body 204 in the moving process along with the conveying belt 8, when the rotating speed of the dust removing roller body 204 is higher than the speed of conveying the flexible facial tissue by the flexible facial tissue conveying belt 8, the dust removing brush bristles 203 can brush dust on the flexible facial tissue, in addition, due to the fact that the air blowing blades 206 are arranged inside the dust removing roller body, the air blowing blades 206 are fixed on the leaf rollers, the leaf rollers drive the dust removing roller body 204 to rotate through the planetary wheel set, the leaf rollers have different rotating speeds, and therefore the air blowing blades 206 can generate wind power to blow off dust attached to the dust removing brush bristles 203; after dust removal is finished, the flexible facial tissue enters the adjusting control chamber 3 along the conveying belt 8, a deviation correcting mechanism arranged in the adjusting control chamber 3 can adjust the position of the flexible facial tissue along the width direction of the flexible facial tissue, an image sensor can be arranged at the top of the deviation correcting mechanism, the image sensor is used for collecting the position information of the flexible facial tissue and then uploading the position information to a controller, and the controller is used for controlling the deviation correcting position and the deviation correcting degree of the deviation correcting mechanism; a first tension control roller 304 is arranged on the oblique lower side of the deviation rectifying mechanism, and the first tension control roller 304 can move perpendicular to the direction of the flexible facial tissue so as to control the tension of the flexible facial tissue during printing; after the tension of the flexible facial tissue is adjusted, the flexible facial tissue can enter the humidifying chamber 4, a water vapor generator 402 in the humidifying chamber 4 can generate water vapor, the water vapor can be adsorbed on the flexible facial tissue and is in the cooling chamber, the water vapor is condensed and soaks the flexible facial tissue, and the moisture content of the soaked flexible facial tissue is kept to be about 3-5 milliliters per square meter; the soaked flexible tissue paper enters the printing chamber 5, is printed with a single color by each printing mechanism 9, and then is quickly dried by the surface dryer 901, so that the immersion of the ink in the thickness direction of the flexible tissue paper is reduced, and the mixed color of the background color of the flexible tissue paper and the ink is reduced; in addition, before each monochromatic printing, the printing position of the flexible face paper conveying direction needs to be finely adjusted by the printing adjusting mechanism 7, after the printing is completed, the flexible face paper enters the drying chamber 6, after the tension control is performed by the second tension control roller 601, the flexible face paper is dried by the drying electric heating plate 602, and the dried flexible face paper is stored by the material receiving mechanism 10.

The foregoing examples are provided for clarity of illustration only and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. An ink color matching system of a digital printing machine is used for providing single-color ink for a printing mechanism (9) of the digital printing machine and is characterized by comprising four primary color ink tanks (501), a flushing water tank (502), an air pump (503) and a stirring mechanism, wherein the four primary color ink tanks respectively correspond to CMYK; the printing mechanism (9) comprises a surface dryer (901), a monochromatic ink box (902), a scraper (903), an ink fountain roller (904), an anilox roller (905), a forme cylinder (906) and an impression cylinder (907), wherein printing ink is arranged in the monochromatic ink box (902), the lower part of the ink fountain roller (904) is immersed in the printing ink, and the scraper (903) is attached to one side of the ink fountain roller (904) and used for uniformly scraping the ink on the ink fountain roller (904); an anilox roller (905) is arranged on the oblique upper side of the ink fountain roller (904) and is used for transferring ink to the plate cylinder (906), and the plate cylinder (906) prints the ink on the flexible surface paper when the flexible surface paper passes between the plate cylinder (906) and the impression cylinder (907); a surface dryer (901) is arranged on the output side of the impression cylinder (907), and the surface dryer (901) is used for quickly drying the ink on the surface of the flexible facial tissue; the bottom of each primary color ink box (501) is respectively provided with an electromagnetic valve and a peristaltic pump (505), the electromagnetic valves and the peristaltic pumps (505) are in parallel connection, the output sides of the electromagnetic valves at the bottom of each primary color ink box (501) are communicated to a collecting pipe, the collecting pipe is connected with a plurality of branch valves (506) through four-way pipes or five-way pipes, the outlets of the branch valves (506) are connected with the branch pipes, and the outlets of the branch pipes extend to the upper parts of the corresponding monochromatic ink boxes (902); the stirring mechanism is used for uniformly stirring the ink boxes in the single-color ink box (902); the bottom of the flushing water tank (502) is communicated with a collecting pipe through an electromagnetic valve, an air pump (503) is connected with the collecting pipe, and when the primary color ink tank (501) sequentially conveys ink to the monochromatic ink box (902), the air pump (503) is always started to push the ink in the collecting pipe and the branch pipe to move; the digital printing machine also comprises a feeding mechanism (1) for conveying the flexible facial tissue to be printed, a dust removing mechanism for removing dust on two sides of the flexible facial tissue and making the surface of the flexible facial tissue rough, a deviation correcting mechanism for adjusting the position of the flexible facial tissue in the width direction, a humidifying mechanism capable of infiltrating the flexible facial tissue to make the humidity of the flexible facial tissue uniform and reach the standard, a drying mechanism for drying the flexible facial tissue, and a material receiving mechanism (10) for receiving the printed flexible facial tissue; the feeding mechanism (1), the deviation correcting mechanism, the humidifying mechanism, the plurality of printing mechanisms (9), the drying mechanism and the material receiving mechanism (10) are arranged in sequence; the dust removing mechanism comprises a dust removing fan (201) and two dust removing brush rolls (202), flexible facial tissue passes through the tangent positions of the two dust removing brush rolls (202), and the two dust removing brush rolls (202) are respectively driven by corresponding dust removing motors and rotate along the moving direction of the flexible facial tissue; the dust removal fan (201) is arranged at the top of the dust removal chamber (2) and blows air downwards; the dust removing brush roll (202) comprises a long tubular dust removing roll body (204), a plurality of dust removing bristles (203) are arranged on the peripheral surface of the outer side of the dust removing roll body (204), a plurality of vent holes are formed in the dust removing roll body (204), an air blowing cavity (205) is formed in the dust removing roll body (204), a blade shaft is arranged in the air blowing cavity (205), a plurality of air blowing blades (206) are arranged on the blade shaft, and the blade shaft and the dust removing roll body (204) are different in rotating direction or rotating speed so that the air blowing blades (206) blow air to the flexible facial tissue through the vent holes in the dust removing roll body (204) and remove dust by air blowing airflow; the end part of the blade shaft is connected with a planetary wheel set, the blade shaft drives the dust removing roller body (204) to rotate through the planetary wheel set, and the rotating speed of the dust removing roller body (204) and the blade shaft is 10: 1.

2. The ink color matching system of the digital printer according to claim 1, wherein the stirring mechanism comprises a stirring blade (507), an electromagnetic stirrer (510) and a linear motion module (511); the monochrome ink box (902) is in a long groove shape with an opening at the upper part, the stirring blade (507) is arranged in the monochrome ink box (902), the electromagnetic stirrer (510) is positioned under the monochrome ink box (902) and is arranged on the linear motion module (511), the linear motion module (511) can drive the electromagnetic stirrer (510) to move along the length direction of the monochrome ink box (902), and the electromagnetic stirrer (510) can be magnetically matched with the stirring blade (507) in the monochrome ink box (902) and drives the stirring blade (507) to rotate and drive the stirring blade (507) to move in the length direction of the monochrome ink box (902).

3. The ink color matching system of the digital printing machine as claimed in claim 2, wherein a color sensor (508) is respectively arranged above each single color ink box (902), and each color sensor is used for collecting the ink color information in the corresponding single color ink box (902) so as to control the opening and closing of the electromagnetic valve or peristaltic pump (505) at the bottom of each primary color ink box (501).

4. The ink color matching system of the digital printer according to claim 3, wherein a discharge valve (509) is provided on a side of the monochrome cartridge (902), and the discharge valve (509) is used to discharge ink or a rinse liquid in the monochrome cartridge (902).

5. The ink matching system of the digital printing machine according to claim 1, wherein the digital printing machine further comprises a tension control mechanism, the tension control mechanism comprises a first tension control roller (304) and a second tension control roller (601), the first tension control roller (304) is arranged between the deviation correction mechanism and the humidification mechanism, the second tension control roller (601) is arranged between the printing mechanism (9) and the drying mechanism, and the first tension control roller (304) and the second tension control roller (601) can move along the thickness direction of the face paper to control and adjust the flexible tension.

6. The ink color matching system of the digital printing machine according to claim 1, wherein the drying mechanism comprises a driving roller and a plurality of drying electric heating plates (602), the drying electric heating plates (602) are arranged below the driving roller, each two of the plurality of drying electric heating plates (602) are in a group, and two drying electric heating plates (602) in each group respectively dry two sides of the flexible facial tissue.