Ink printing structure and system for decorative paper

Abstract

The present invention relates to the field of ink printing technology, and discloses an ink printing structure and system for decorative paper. The key points of the technical solution are that it includes a mounting frame and a printing roller, and the printing roller is mounted on the mounting frame; and an ink adding component, the ink adding component includes an ink cartridge, a first slide, a second slide and a plurality of nozzles, the ink cartridge is arranged on the mounting frame, the ink cartridge has an ink cavity and an ink inlet connected to the ink cavity, the plurality of nozzles are arranged in sequence on one side of the ink cartridge and aligned with the printing roller, the first slide and the second slide are arranged in the ink cartridge in a mutually fitting manner, the first slide and the second slide form a plurality of ink outlet channels, the plurality of ink outlet channels are arranged in a one-to-one correspondence with the plurality of nozzles, and the first slide and the second slide are constructed to move as the ink pressure in the ink cavity increases or decreases, so as to control the increase or decrease of the inner diameter of the ink outlet channel to be closed.

Description

Technical Field

[0001] The present invention relates to the technical field of ink printing, and more particularly to an ink printing structure and system for decorative paper. Background Art

[0002] Decorative paper is an essential raw material in many building materials products, such as low-pressure and high-pressure boards used in furniture and cabinets, as well as fireproof boards and flooring. In the product structure, decorative paper is placed under the surface paper, mainly providing decorative patterns and covering to prevent the bottom layer of glue from seeping through. This layer requires the paper to have good covering power and aesthetics.

[0003] In existing technology, when printing ink on pharmaceutical packaging boxes, the printing structure often uses a printing roller or a combination of an inking roller and a printing roller. These printing structures are installed on the production line during the production process. If uneven application occurs, a large amount of decorative paper is likely to be scrapped. Therefore, ensuring the uniformity of decorative paper application and controlling the amount of application are urgent issues that need to be addressed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide an ink printing structure and system for decorative paper, so as to overcome the above-mentioned defects in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an ink printing structure and system for decorative paper, comprising a mounting frame and a printing roller, wherein the printing roller is mounted on the mounting frame; and

[0006] An ink filling assembly, the ink filling assembly includes an ink cartridge, a first slide, a second slide and a plurality of nozzles, the ink cartridge is arranged on the mounting frame, the ink cartridge has an ink chamber and an ink inlet connected to the ink chamber, the plurality of nozzles are arranged in sequence on one side of the ink cartridge and aligned with the printing roller, the first slide and the second slide are arranged in the ink cartridge in a fit with each other, the first slide and the second slide form a plurality of ink outlet channels, the plurality of ink outlet channels are arranged in a one-to-one correspondence with the plurality of nozzles, the first slide and the second slide are constructed to move as the ink pressure in the ink chamber increases or decreases, so as to control the increase or decrease of the inner diameter of the ink outlet channel to close.

[0007] As a further improvement of the present invention, a plurality of first through holes and a plurality of second through holes are respectively provided on the first slide plate and the second slide plate, and the overlapping parts between the first through holes and the corresponding second through holes form the ink outlet channel. When the ink chamber is not full of ink, the first through holes and the second through holes are in a staggered state so that the ink outlet channel is closed.

[0008] As a further improvement of the present invention, the ink filling assembly also includes two resistance members, which are respectively arranged on both sides of the ink chamber. One end of the first slide and one end of the second slide are respectively fitted and connected with the corresponding resistance members. The resistance members are deformed by pressure to drive the first slide and the second slide to move, or the first slide and the second slide are moved by pressure to drive the resistance members to deform.

[0009] As a further improvement of the present invention, a sliding groove is provided at the bottom of the first slide plate, and the sliding direction of the sliding groove is respectively toward the two resistance members. A slider is provided on the top of the second slide plate, and the slider is in the sliding groove and moves along the sliding direction of the sliding groove.

[0010] As a further improvement of the present invention, the ink-filling assembly also includes a substrate and a smear brush. The substrate is arranged at the ink outlet end of the nozzle. Ink outlet holes corresponding to the nozzles are opened on the substrate. The substrate is constructed to be deformable. The smear brush is arranged on the substrate and abuts against the printing roller. The nozzle is constructed as a telescopic nozzle. When the nozzle is extended, it drives at least part of the substrate to move toward the printing roller to increase the contact area between at least part of the smear brush and the printing roller and the pressure acting on the printing roller.

[0011] As a further improvement of the present invention, the ink adding assembly also includes a cleaning part, which includes a push plate and a cylinder. The cylinder is arranged on the ink cartridge, and the output end of the cylinder extends into the ink cavity. The push plate is located in the ink cavity and is connected to the output end of the cylinder. The cylinder can drive the push plate to move beyond the nozzle to discharge the ink from the ink cavity.

[0012] As a further improvement of the present invention, it also includes an ink absorption component, which is installed on the mounting frame and located at the lower side of the ink adding component. The ink absorption component includes an ink absorption frame, which is hollow and open on one side. The opening of the ink absorption frame is aligned with the printing roller. A scraper is installed at the opening of the ink absorption frame, and the scraper abuts against the printing roller. A number of partitions are sequentially arranged in the ink absorption frame along the axial direction of the printing roller to form a number of suction chambers. The ink absorption frame is provided with a number of air suction ports respectively connected to the suction chambers.

[0013] As a further improvement of the present invention, the ink printing structure for decorative paper further includes a line light source and a visual sensor, wherein the line light source and the visual sensor are both aligned with the portion of the printing roller passing through the inking assembly, and the length of the line light source is arranged in a direction parallel to the axial direction of the roller; and

[0014] a database comprising spot width information and a plurality of inner diameter values ​​of the ink outlet channel, the spot width information comprising standard spot width values ​​of the printing cylinder mapped by the line light source at different ink volumes, the plurality of standard spot width values ​​respectively corresponding to a plurality of inner diameter values ​​of the ink outlet channel;

[0015] An image processing module, wherein the image acquisition module acquires an image captured by a visual sensor in real time, performs feature recognition and extraction on boundary patterns of light spots in the image, and calibrates the width of the extracted light spot image along the circumference of the printing cylinder to generate calibration image information containing the calibration pattern; and

[0016] a data calculation module, which obtains the calibration image information and the standard spot width value corresponding to the inner diameter value, calculates the actual width value of each calibration location in the spot image, compares the actual width values ​​with the standard spot values, and generates first control information if the comparison result is greater than an expected interval; and generates second control information if the comparison result is less than the expected interval; and

[0017] A first control module is configured to obtain the first control information and the second control information. When the first control information is obtained, the control module controls the corresponding nozzle to extend. When the second control information is obtained, the control module controls the corresponding nozzle to shorten.

[0018] As a further improvement of the present invention, it further includes a second control module and a flow detection module;

[0019] The second control module controls the plurality of suction ports to extract ink from the corresponding suction chambers at preset times and generates a detection signal;

[0020] The flow detection module obtains the detection signal in real time, calculates a number of flow values ​​in the suction chamber, and generates ink residual information containing the a number of flow values.

[0021] As a further improvement of the present invention, it further includes an alarm system and a third control module;

[0022] The alarm system has a built-in first threshold value. The alarm system obtains the ink remaining information in real time, compares several flow values ​​contained in the ink remaining information with the first threshold value, and sends a stop command to the third control module if any flow value is greater than the first threshold value.

[0023] The third control module controls the printing roller to stop rotating when receiving the stop command.

[0024] Beneficial effects of the present invention: Compared with the printing method of the prior art, the present invention sets a first slide and a second slide, and forms a plurality of ink outlet channels with controllable opening and closing sizes on the two slides. When the ink cavity is not filled with ink, the ink outlet channel is always closed. Only after the ink is filled, the ink pressure will reach the level that drives the ink outlet channel to open. With this arrangement, when the ink inlet has a small amount of ink, the ink cavity will not be not filled with ink, and the problem of unevenness of each nozzle will not occur, which effectively improves the uniformity of printing. In addition, the adjustable inner diameter of the ink outlet channel improves the practicality of the entire ink printing structure and adapts to some printing scenarios that require a thinner paint surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional main view structure of the present invention;

[0026] Figure 2 It is a schematic diagram of a partial three-dimensional main structure of the present invention;

[0027] Figure 3 This is a schematic diagram of a three-dimensional main view structure of another embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of a partial three-dimensional main structure of the present invention;

[0029] Figure 5 This invention Figure 4 sectional view of

[0030] Figure 6 This invention Figure 5 Simplified cross-sectional view of

[0031] Figure 7 is a bottom view of the first slide plate of the present invention;

[0032] Figure 8 is a bottom view of the second slide plate of the present invention;

[0033] Figure 9 It is a cross-sectional view of the slider of the present invention.

[0034] Figure numerals: 1. first slide; 2. second slide; 3. ink cartridge; 4. nozzle; 5. ink adding assembly; 6. mounting frame; 7. printing roller; 8. ink chamber; 9. ink inlet; 10. ink outlet channel; 11. first through hole; 12. second through hole; 13. resistance member; 14. slide groove; 15. slider; 16. smear brush; 17. substrate; 18. cylinder; 19. push plate; 20. cleaning member; 21. moving plate; 22. spring; 23. ink absorption assembly; 24. suction chamber; 25. ink absorption port; 26. scraper; 27. motor; 28. smear roller. DETAILED DESCRIPTION

[0035] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0036] The ink printing structure of a decorative paper of this embodiment comprises a mounting frame 6 and a printing roller 7, wherein the printing roller is mounted on the mounting frame 6; and

[0037] The ink filling assembly 5 includes an ink cartridge 3, a first slide 1, a second slide 2 and a plurality of nozzles 4. The ink cartridge 3 is arranged on a mounting frame 6. The ink cartridge 3 has an ink chamber 8 and an ink inlet 9 connected to the ink chamber 8, wherein the ink inlet 9 is connected to an external ink supply device. The ink supply device (for delivering ink into the ink filling assembly 5) is also installed on the production line. It is a prior art and will not be described in detail here. The plurality of nozzles 4 are sequentially arranged on one side of the ink cartridge 3 and aligned with the printing roller 7. As shown in the accompanying drawings, the ink cartridge 3 is mounted on one side of the mounting frame 6, and the side on which the nozzle 4 is mounted is tilted downward. The advantage of this arrangement is that it is convenient for ink to be sprayed out from the ink filling assembly 5. The plate 1 and the second slide plate 2 are fitted together in the ink cartridge 3. The width of the first slide plate 1 and the second slide plate 2 is the same as the width of the ink chamber 8, which effectively prevents the ink from flowing to the sides of the first slide plate 1 and the second slide plate 2. The first slide plate 1 and the second slide plate 2 are formed with a plurality of ink outlet channels 10, and the plurality of ink outlet channels 10 are arranged in a one-to-one correspondence with the plurality of nozzles 4. The first slide plate 1 and the second slide plate 2 are constructed to move as the ink pressure in the ink chamber 8 increases or decreases, so as to control the increase or decrease of the inner diameter of the ink outlet channel 10 to be closed, that is, the greater the pressure in the ink chamber 8, the larger the aperture of the ink outlet channel 10. When the pressure in the ink chamber 8 does not reach the threshold, the ink outlet channel 10 is closed.

[0038] Specifically, the nozzles 4 are arranged at equal distances from each other and are installed on the ink cartridge 3 in a straight line. The advantage of such an arrangement is that it can ensure that the ink can be evenly covered on the printing roller 7 after leaving the nozzle 4 as much as possible.

[0039] Compared with the printing method of the prior art, the present invention is provided with a first slide 1 and a second slide 2, and a plurality of ink outlet channels 10 with controllable opening and closing sizes are formed on the two slides. When the ink cavity 8 is not filled with ink, the ink outlet channel 10 is always closed. Only after the ink is filled, the ink pressure will reach the level that drives the ink outlet channel 10 to open. With this arrangement, when the ink inlet 9 has a small amount of ink, the ink cavity 8 will not be not filled with ink, and the problem of unevenness of each nozzle 4 will not occur, which effectively improves the uniformity of printing. In addition, the adjustable inner diameter of the ink outlet channel 10 improves the practicality of the entire ink printing structure and adapts to some printing scenarios that require a thinner paint surface.

[0040] In one embodiment, a plurality of first through holes 11 and a plurality of second through holes 12 are respectively provided on the first slide 1 and the second slide 2, and the overlapping portion between the first through holes 11 and the corresponding second through holes 12 forms an ink outlet channel 10. During the movement of the first slide 1 and the second slide 2, the area of ​​the overlapping portion changes accordingly, and the greater the distance the first slide 1 and the second slide 2 move away from each other, the larger the area of ​​the overlapping portion. When the first slide 1 and the second slide 2 are at the extreme position away from each other, the first through holes 11 and the second through holes 12 are exactly coaxial with the nozzle 4. When the ink chamber 8 is not full of ink, the first through holes 11 and the second through holes 12 are in a misaligned state, that is, the first through holes 11 and the second through holes 12 have no overlapping portion, so that the ink outlet channel 10 is closed. The present invention controls the inner diameter of the ink outlet channel 10 by setting the overlapping portion of the first through holes 11 and the second through holes 12, and the structural setting is simpler, and it is only necessary to open holes in the first slide 1 and the second slide 2.

[0041] Specifically, the plurality of first through holes 11 and the plurality of second through holes 12 are all arranged at equal intervals or in an array, and the nozzles 4 are also arranged at equal intervals or in an array. With this arrangement, the ink on the smear brush 16 can be ensured to be as uniform as possible.

[0042] In one embodiment, the ink filling assembly 5 also includes two resistance members 13, which are respectively arranged on both sides of the ink chamber 8, that is, on both sides of the length direction of the first skateboard 1 or the second skateboard 2. One end of the first skateboard 1 and one end of the second skateboard 2 are respectively fitted and connected with the corresponding resistance members 13. The resistance members 13 are deformed under pressure to drive the first skateboard 1 and the second skateboard 2 to move, or the first skateboard 1 and the second skateboard 2 are moved under pressure to drive the resistance members 13 to deform.

[0043] In one embodiment, the portion where the first slide 1 and the second slide 2 are connected to the corresponding resistance member 13 is adapted to the shape of the ink chamber 8. The adaptation here means that the portion where the first slide 1 and the second slide 2 are connected to the resistance member 13 has a height and width equal to the ink chamber 8, so that the ink cannot flow from the gap between the first slide 1 and the second slide 2 and the ink chamber 8 to the position where the resistance member 13 is stored. In this embodiment, the first slide 1 and the second slide 2 are moved by pressure and drive the resistance member 13 to deform. After the oil pressure in the ink chamber 8 is reduced, the resistance member 13 is reset, driving the first slide 1 and the second slide 2 to move and reset.

[0044] In one embodiment, the shape of the resistance member 13 is adapted to the shape of the ink chamber 8, that is, the height and width of the resistance member 13 are equal to the ink chamber 8, so that even if the ink passes over the first slide 1 or the second slide 2, it will be blocked by the resistance member 13. In this embodiment, the resistance member 13 is deformed by pressure to drive the first slide 1 and the second slide 2 to move (the shapes of the first slide 1 and the second slide 2 may not be adapted to the shape of the ink chamber 8, as long as they are connected to the resistance member 13), or the first slide 1 and the second slide 2 may be moved by pressure to drive the resistance member 13 to shape (the same setting method as the first slide 1 and the second slide 2 in the previous embodiment, that is, the shape is adapted to the ink chamber 8).

[0045] Specifically, the resistance member 13 includes but is not limited to a rubber block, a silicone block, etc., and only needs to have a certain deformation ability.

[0046] Furthermore, as shown in the accompanying drawings, the resistance member 13 is hollow, and a closed space is formed in the hollow, thereby effectively increasing the deformation stroke of the resistance member 13.

[0047] In one embodiment, the first slide plate 1 and the second slide plate 2 move under pressure to drive the resistance member 13 to deform. In this embodiment, the resistance member 13 can be configured to include but not limited to a spring 22, a gas pressure rod and other structures.

[0048] In one embodiment, a slide groove 14 is provided at the bottom of the first skateboard 1, and the sliding directions of the slide groove 14 are respectively toward the two resistance members 13, that is, the two ends of the slide groove 14 are aligned with the two resistance members 13. A slider 15 is provided on the top of the second skateboard 2, and the slider 15 is in the slide groove 14 and moves along the sliding direction of the slide groove 14. Of course, the slider 15 can also be set on the first skateboard 1 and the slide groove 14 can be set on the second skateboard 2.

[0049] Specifically, there can be several slide grooves 14 and sliders 15, and the number of sliders 15 in each slide groove 14 can be one or more. The arrangement of multiple slide grooves 14 and multiple sliders 15 can ensure the stability of the mutual sliding between the first slide 1 and the second slide 2, so that the gap between the first slide 1 and the second slide 2 can also be sealed as much as possible.

[0050] Specifically, the cross-section of the slide groove 14 and the slider 15 is "T"-shaped, and the width of the slider 15 at the bottom of the slide groove 14 is greater than the width of the slider 15 at the notch of the slide groove 14. This setting can prevent the two sliders from moving relative to each other in directions other than the sliding direction.

[0051] In one embodiment, the inking assembly 5 also includes a substrate 17 and a smear brush 16. The substrate 17 is arranged at the ink outlet end of the nozzle 4. The substrate 17 is provided with ink outlet holes corresponding to the nozzle 4 one by one. The substrate 17 is constructed to be deformable, that is, during the extension or retraction of the nozzle 4, the substrate 17 can bend along with the deformation, and the smear brush 16 can always be attached to the substrate 17. The smear brush 16 is arranged on the substrate 17 and abuts against the printing roller 7. The nozzle 4 is constructed as a telescopic nozzle 4. When the nozzle 4 is extended, at least part of the substrate 17 is driven to move toward the printing roller 7 to increase the contact area between at least part of the smear brush 16 and the printing roller 7 and the pressure acting on the printing roller 7. Conversely, when the nozzle 4 is shortened, the contact area between the smear brush 16 and the printing roller 7 and the pressure acting on the printing roller 7 are correspondingly reduced.

[0052] The present invention provides a deformable substrate 17 to cooperate with the nozzle 4 that can be extended or shortened. When it is detected that the amount of ink output on the printing roller 7 is uneven, the length of the nozzle 4 can be adjusted, thereby adjusting the contact area between the corresponding smear brush 16 and the printing roller 7 and the pressure acting on the printing roller 7, so that the ink on the printing roller 7 can be guaranteed to be uniform, effectively preventing the problem of uneven smearing.

[0053] In one embodiment, the installation method of the substrate 17 and the smear brush 16 includes but is not limited to bonding, snapping, etc.

[0054] In one embodiment, the material of the substrate 17 includes but is not limited to a carbon plate, a flexible metal plate, etc.

[0055] Specifically, the nozzle 4 can be stuck exactly at the ink outlet hole on the substrate 17 .

[0056] In one embodiment, the telescopic nozzle 4 includes a first nozzle, a second nozzle, an electromagnet and a spring 22, one end of the first nozzle is connected to the ink outlet of the ink cartridge 3, and the second nozzle is slidably installed inside the first nozzle, wherein the end of the second nozzle away from the ink cartridge 3 is connected to the ink outlet of the substrate 17, the two ends of the spring 22 are respectively connected to the first nozzle and the second nozzle, and two electromagnets can be provided, respectively installed on the first nozzle and the second nozzle. When the electromagnets are energized, they repel or attract each other to control the first nozzle and the second nozzle to move closer to or farther away from each other. At the same time, the spring 22 is stretched or compressed during this process. The function of the spring 22 is to reset the second nozzle.

[0057] In one embodiment, the ink adding assembly 5 also includes a cleaning part 20, which includes a push plate 19 and a cylinder 18. The cylinder 18 is arranged on the ink cartridge 3, and the output end of the cylinder 18 extends into the ink chamber 8. The push plate 19 is located in the ink chamber 8 and is connected to the output end of the cylinder 18. The cylinder 18 can drive the push plate 19 to move over the nozzle 4 to discharge the ink from the ink chamber 8. Through the setting of the cleaning assembly, when the equipment is stopped, the ink in the ink chamber 8 can be basically drained to prevent the ink from clumping in the ink chamber 8.

[0058] Specifically, a plurality of cylinders 18 may be provided to improve the stability of the movement of the push plate 19 .

[0059] In one embodiment, a connecting tube is formed at the pushing plate 19 aligned with the ink inlet 9 and inserted into the ink inlet 9, so as to prevent the pushing plate 19 from closing the ink inlet 9, and the connecting tube passes through the pushing plate 19, so that the ink in the ink inlet 9 can be poured into the ink cavity 8.

[0060] In one embodiment, the two sides of the push plate 19 are hollow and have a slidingly connected moving plate 21 built in, wherein the width of the moving plate 21 and the push plate 19 are equal to the ink chamber 8, one end of the moving plate 21 slides in the push plate 19, and a spring 22 is connected inside the moving plate 21 and the push plate 19, and the spring 22 is in a compressed state. The other end of the moving plate 21 abuts against the corresponding first substrate 17 or the second substrate 17 respectively. In the process of the push plate 19 moving downward, the pressure in the ink chamber 8 increases, causing the first slide plate 1 and the second slide plate 2 to move away from each other, and the two moving plates 21 follow the first slide plate 1 and the second slide plate 2 to move through the reset of the spring 22, and when the ink outlet channel 10 is opened, the ink can be discharged.

[0061] By setting the movable plate 21, it can be ensured as much as possible that the pushing plate 19 and the movable plate 21 cover the ink cavity 8 during the downward pressing process of the pushing plate 19, preventing the ink from escaping from the gap between the movable plate 21 (and the pushing plate 19) and the ink cavity 8 to the upper side of the movable plate 21 and the pushing plate 19.

[0062] In one embodiment, the ink inlet 9 is built with a one-way valve. The one-way valve can prevent the ink from being discharged from the ink inlet 9 during the movement of the push plate 19.

[0063] In one embodiment, an ink suction component 23 is further included. The ink suction component 23 is installed on the mounting frame 6 and is located at the lower side of the ink adding component 5. The ink suction component 23 includes an ink suction frame. The ink suction frame is hollow and has an opening on one side. The opening of the ink suction frame is aligned with the printing roller 7. A scraper 26 is installed at the opening of the ink suction frame. The scraper 26 abuts against the printing roller 7. A number of partitions are arranged in sequence along the axial direction of the printing roller 7 in the ink suction frame to form a number of suction chambers 24. The ink suction frame is provided with a number of air suction ports respectively connected to the suction chambers 24. The air suction ports can be connected to an air pump. The setting of multiple ink chambers 8 can more conveniently obtain the statistics of the residual ink on the printing roller 7, and the recovered ink can be recycled after filtration.

[0064] Specifically, the scraper 26 is made of a flexible material.

[0065] Specifically, one end of the scraper 26 installed on the ink suction frame is higher than one end of the air suction port, which is convenient for collecting ink.

[0066] In one embodiment, the light source and the visual sensor are both mounted on the top inner side of the mounting frame 6 and are perpendicular to the printing cylinder 7, so that the light spot formed when projected onto the cylinder will not have deviations in the shape of the light spot due to deviations in the projection angle.

[0067] In one embodiment, a motor 27 is further included. The mounting frame 6 is mounted with the motor 27 , and the printing roller 7 is driven to rotate by the motor 27 .

[0068] In one embodiment, a coating roller 28 is further included. The coating roller 28 is arranged on the upper side of the printing roller 7, and is in close contact with the printing roller 7 and the axes are parallel to each other. The corresponding inking device and ink absorbing device are no longer in contact with the printing roller 7, but in contact with the coating roller 28. The setting of the coating roller 28 effectively improves the uniformity of the ink on the printing roller 7.

[0069] Specifically, in this embodiment, the connection between the coating roller 28 and the printing roller includes but is not limited to pulley connections and gears, wherein the motor 27 directly drives the coating roller 28 to rotate, and indirectly drives the printing roller 7 to rotate through the pulley, wherein the diameter of the pulley on the coating roller 28 and the diameter of the pulley on the printing roller 7 are adaptively configured according to the diameter ratio of the coating roller 28 to the printing roller 7, ensuring that the rotation distance of the contact point between the coating roller 28 and the printing roller 7 is equal, thereby ensuring that the ink can be evenly applied to the printing roller 7 through the coating roller 28.

[0070] In one embodiment, the printing roller 7 and / or the coating roller 28 include but are not limited to rubber, silicone, metal, etc.

[0071] In one embodiment, the ink printing structure for decorative paper further comprises a line light source and a visual sensor, wherein the line light source and the visual sensor are both aligned with the portion of the printing roller 7 passing through the inking assembly 5, and the length of the line light source is arranged in a direction parallel to the axial direction of the roller; and

[0072] The database includes spot width information and several inner diameter values ​​of the ink outlet channel 10. The spot width information includes standard spot width values ​​of the printing roller 7 under different ink amounts when the line light source is mapped. Several standard spot width values ​​correspond to several inner diameter values ​​of the ink outlet channel 10. The more ink on the roller, the closer the distance to the light source and the visual sensor, and the different spot widths. As shown in the attached figure, when light is irradiated on a cylindrical roller, the spot width is more obvious, and it is more convenient to measure the spot width. The inner diameter value is related to the ink output and the ink amount on the printing roller 7. That is, the larger the inner diameter of the ink outlet channel 10, the more ink on the printing roller 7, and the wider the spot formed by the light.

[0073] The image processing module and the image acquisition module acquire the image captured by the visual sensor in real time, perform feature recognition and extraction on the boundary lines of the light spots in the image, and perform width calibration on the extracted light spot image along the circumference of the printing cylinder 7 to generate calibration image information containing the calibration; and

[0074] a data calculation module, which obtains the calibration image information and the standard spot width value corresponding to the inner diameter value, calculates the actual width value of each calibration location in the spot image, compares the actual width values ​​with the standard spot value, and generates first control information if the comparison result is greater than the expected range; and generates second control information if the comparison result is less than the expected range; and

[0075] The first control module obtains first control information and second control information. When the first control information is obtained, the corresponding nozzle 4 is controlled to extend. When the second control information is obtained, the corresponding nozzle 4 is controlled to shorten.

[0076] The present invention provides a system for controlling ink printing, which is used to monitor the amount of ink on the printing roller 7 or the smear roller 28 in real time, and determine the ink thickness at each point of the printing roller 7 or the smear roller 28 by identifying the width of the light spot. Through the first control module, the extension and shortening of the nozzle 4 corresponding to each point can be controlled to increase or decrease the amount of ink at that point, thereby ensuring the depth and uniformity of the ink on the decorative paper. At the same time, when the light spot is uniform, the amount of ink entering the ink inlet 9 can be controlled by detecting the width of the light spot, thereby ensuring the amount of ink required for the decorative paper.

[0077] Specifically, the expected interval defaults to 90% to 110% of the standard spot value, and the expected interval can be set to a specific interval value through the system.

[0078] In one embodiment, it further includes a second control module and a flow detection module;

[0079] The second control module controls the plurality of suction ports to extract ink from the corresponding suction chamber 24 at preset times and generates a detection signal;

[0080] The flow detection module obtains the detection signal in real time, calculates the flow values ​​in the suction chamber 24, and generates ink residual information containing the flow values.

[0081] Through the second control module and the flow detection module, the residual amount of ink on the printing roller 7 after printing is completed can be detected. In this way, even if the axis of the printing roller 7 is eccentric or the decorative paper is not straightened, it can be detected in time, making it convenient for the staff to detect it in time.

[0082] In one embodiment, further comprising an alarm system and a third control module;

[0083] The alarm system has a built-in first threshold value. The alarm system obtains ink remaining information in real time, compares several flow values ​​contained in the ink remaining information with the first threshold value, and sends a stop command to the third control module if any flow value is greater than the first threshold value.

[0084] The third control module controls the printing roller 7 to stop rotating when receiving the stop command. Of course, it can also stop the production of the entire assembly line to reduce losses.

[0085] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. An ink printing structure for decorative paper, characterized by: It comprises a mounting frame (6) and a printing roller (7), wherein the printing roller (7) is mounted on the mounting frame (6); and An ink filling assembly (5), the ink filling assembly (5) comprising an ink cartridge (3), a first slide (1), a second slide (2) and a plurality of nozzles (4), the ink cartridge (3) being arranged on the mounting frame (6), the ink cartridge (3) being provided with an ink chamber (8) and an ink inlet (9) communicating with the ink chamber (8), the plurality of nozzles (4) being sequentially arranged on one side of the ink cartridge (3) and aligned with the printing roller (7), the first slide (1) and the second slide (2) being arranged in contact with each other in the ink cartridge (3), the first slide (1) and the second slide (2) forming a plurality of ink outlet channels (10), the plurality of ink outlet channels (10) being arranged in a one-to-one correspondence with the plurality of nozzles (4), the first slide (1) and the second slide (2) being constructed to move as the ink pressure in the ink chamber (8) increases or decreases, so as to control the increase or decrease of the inner diameter of the ink outlet channel (10) to close; A plurality of first through holes (11) and a plurality of second through holes (12) are respectively provided on the first slide plate (1) and the second slide plate (2); the overlapping portion between the first through holes (11) and the corresponding second through holes (12) forms the ink outlet channel (10); when the ink chamber (8) is not filled with ink, the first through holes (11) and the second through holes (12) are in a misaligned state, so that the ink outlet channel (10) is closed.

2. The ink printing structure for decorative paper according to claim 1, characterized in that: The ink filling assembly (5) also includes two resistance members (13), which are respectively arranged on both sides of the ink chamber (8), and one end of the first slide (1) and one end of the second slide (2) are respectively fitted and connected with the corresponding resistance members (13), and the resistance members (13) are deformed by pressure to drive the first slide (1) and the second slide (2) to move, or the first slide (1) and the second slide (2) are moved by pressure to drive the resistance members (13) to deform.

3. The ink printing structure for decorative paper according to claim 2, characterized in that: A sliding groove (14) is provided at the bottom of the first slide plate (1), and the sliding direction of the sliding groove (14) is respectively toward the two resistance members (13); a slider (15) is provided on the top of the second slide plate (2), and the slider (15) is in the sliding groove (14) and moves along the sliding direction of the sliding groove (14).

4. The ink printing structure for decorative paper according to claim 1, characterized in that: The ink filling assembly (5) further includes a substrate (17) and a smear brush (16), wherein the substrate (17) is arranged at the ink outlet end of the nozzle (4), and ink outlet holes corresponding to the nozzle (4) are opened on the substrate (17), and the substrate (17) is constructed to be deformable. The smear brush (16) is arranged on the substrate (17) and abuts against the printing roller (7), and the nozzle (4) is constructed as a telescopic nozzle (4). When the nozzle (4) is extended, it drives at least part of the substrate (17) to move toward the printing roller (7), so as to increase the contact area between at least part of the smear brush (16) and the printing roller (7) and the pressure acting on the printing roller (7).

5. The ink printing structure for decorative paper according to claim 1, characterized in that: The ink filling assembly (5) further includes a cleaning member (20), the cleaning member (20) including a push plate (19) and a cylinder (18), the cylinder (18) being arranged on the ink cartridge (3), the output end of the cylinder (18) extending into the ink cavity (8), the push plate (19) being located in the ink cavity (8) and connected to the output end of the cylinder (18), the cylinder (18) being capable of driving the push plate (19) to move toward the nozzle (4) to discharge ink from the ink cavity (8).

6. The ink printing structure for decorative paper according to claim 1, characterized in that: The invention also includes an ink suction component (23), which is installed on the mounting frame (6) and is located at the lower side of the ink adding component (5). The ink suction component (23) includes an ink suction frame, which is hollow and has an opening on one side. The opening of the ink suction frame is aligned with the printing roller (7). A scraper (26) is installed at the opening of the ink suction frame, and the scraper (26) abuts against the printing roller (7). A plurality of partitions are sequentially arranged in the ink suction frame along the axial direction of the printing roller (7) to form a plurality of suction chambers (24). A plurality of air inlets are provided on the ink suction frame, which are respectively connected to the suction chambers (24).

7. An ink printing system for decorative paper, characterized by: An ink printing structure for decorative paper according to any one of claims 1 to 6, further comprising a line light source and a visual sensor, wherein the line light source and the visual sensor are both aligned with a portion of the printing roller (7) passing through the inking assembly (5), and the length of the line light source is arranged in a direction parallel to the axial direction of the printing roller; as well as A database, the database including spot width information and a plurality of inner diameter values ​​of the ink outlet channel (10), the spot width information including standard spot width values ​​of the printing roller (7) mapped by the line light source under different ink amounts, the plurality of standard spot width values ​​corresponding to a plurality of inner diameter values ​​of the ink outlet channel (10); An image processing module, wherein the image processing module acquires an image captured by a visual sensor in real time, performs feature recognition and extraction on the boundary patterns of the light spots in the image, and calibrates the width of the extracted light spot image along the circumference of the printing roller (7) to generate calibration image information containing the calibration; as well as a data calculation module, which obtains the calibration image information and the standard spot width value corresponding to the inner diameter value, calculates the actual width value of each calibration location in the spot image, compares the actual width values ​​with the standard spot values, and generates first control information if the comparison result is greater than an expected range; and generates second control information if the comparison result is less than the expected range; as well as A first control module, wherein the control module obtains the first control information and the second control information, and when the first control information is obtained, controls the corresponding nozzle (4) to extend, and when the second control information is obtained, controls the corresponding nozzle (4) to shorten.

8. The ink printing system for decorative paper according to claim 7, characterized in that: Also includes a second control module and a flow detection module; The second control module controls the plurality of air intake ports to extract ink from the corresponding suction chamber (24) at a preset time and generates a detection signal; The flow detection module acquires the detection signal in real time, calculates a number of flow values ​​in the suction chamber (24), and generates ink residual information containing the number of flow values.

9. The ink printing system for decorative paper according to claim 8, characterized in that: Also included are an alarm system and a third control module; The alarm system has a built-in first threshold value. The alarm system obtains the ink remaining information in real time, compares several flow values ​​contained in the ink remaining information with the first threshold value, and sends a stop command to the third control module if any flow value is greater than the first threshold value. The third control module controls the printing roller (7) to stop rotating when receiving the stop command.

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