RIP dot layout digital printing device and printing method thereof

Abstract

The invention relates to the technical field of digital printing, and discloses an RIP dot layout digital printing device and a printing method thereof.The RIP dot layout digital printing device comprises a printer body, a material carrying shaft and a rolling shaft, the material carrying shaft and the rolling shaft are rotationally installed on the printer body, a fixing frame is fixedly installed in the printer body, a sliding rail is fixedly installed on the fixing frame, and a sliding seat is slidably installed on the sliding rail; a plurality of spray heads are fixedly installed on the sliding seat, a belt is installed on the fixing frame in a transmission mode, driving equipment is fixedly installed on the fixing frame, and the sliding seat is fixedly installed on the belt. According to the digital printing device, the sliding base is used for driving the spray head to reciprocate so as to conduct printing work, the sliding rod is pushed into the fixing frame through the baffle on the sliding base, the sliding rod drives the wedge-shaped block to break away from limiting of the magnetic block, the magnetic block is pushed by the telescopic rod to move upwards and is aligned with the magnetic base, and the magnetic base is attracted by the magnetic force of the magnetic block; and the rotating shaft and the cleaning roller are driven to move towards the magnetic block for cleaning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of digital printing, in particular to a RIP image dot layout digital printing device and a printing method thereof. BACKGROUND

[0002] RIP, also known as raster image processor, is a processor or software in a printing output system for converting PS, PDF and other files into raster dot array data, used for driving printers, plate making machines and other equipment, the core of which is composed of an interpretation part and a control part, the former is responsible for translating page instructions into a "display list" and performing rasterization processing, and the latter controls the operation of the imaging system, the most important part of the RIP is the interpretation part, which first translates the instructions of the page description language into a "display list", all computing objects in the page are buffered and stored in a unified format, the second step is to convert the objects in the "display list" through a restoration module according to the resolution of the output device, then the continuous tone image obtained is segmented into dots by means of a rasterization module, and converted into the original data format of the output device, and then the image is segmented into a pixel matrix corresponding to the physical resolution of the printer, and the continuous tone is converted into a dot array through an algorithm, and finally enters the physical printing stage, RIP is widely used in advertising spray drawing, high-end image output and industrial label printing and other industries.

[0003] Kyocera UV nozzle KJ4A-AA has small nozzle and high printing precision, and is suitable for label and code spraying industry. Since the nozzle is composed of 16 column nozzles with a mutual difference of 600DPI physical precision, and the distance between each column is far, the nozzle has a high requirement for the processing of the nozzle bottom plate and the level of the printing medium, and slight errors will cause obvious stringing in the printing effect. At present, many manufacturers using Kyocera nozzles have different degrees of printing stringing problems; changing the size and arrangement of the dots in the RIP image process can effectively solve the nozzle stringing problem.

[0004] Kyocera nozzle printing effect is prone to stringing problem, and is more suitable for scanning machines in the textile industry, which can compensate for the stringing problem through multi-PASS printing; for singlepass equipment, the product is sprayed out at one time, and the stringing effect is difficult for customers to accept; the nozzle arrangement structure of Kyocera nozzle leads to a high requirement for the machining precision of the nozzle bottom plate during production.

[0005] The existing digital printing device usually adopts thermal bubble jet printing technology, which principle is that a micro heating resistor is arranged in the nozzle, the current is instantaneously heated to above 300 DEG C, the ink is vaporized to generate a bubble, the bubble is expanded to extrude the ink chamber, the ink droplet is sprayed out of the nozzle, then the bubble is broken to form a negative pressure to suck new ink, and the high temperature environment can accelerate the thermal decomposition of the pigment or resin component in the ink, to form carbonized particles and deposit in the nozzle inner wall, the carbonized particles adhere to the inner wall of the nozzle hole with a diameter of only 20-50 microns, the effective aperture is reduced or part of the nozzle hole is completely blocked, the ink jet path may be deviated, and the ink droplet may deviate from the predetermined coordinate, the adjacent dots may overlap or have abnormal gap, the image continuity is damaged, the resistance caused by the blockage and the surface tension of the ink may make the ink unable to separate from the nozzle, and the surface tension of the ink will make the sprayed ink retract to the bottom of the nozzle and adhere, the ink is more volatile when exposed to air, the pigment or resin in the ink is easy to accumulate again at the nozzle, to cause more serious blockage, and part of the blocked nozzle may seep out residual ink during non-spraying movement, to form random filaments, therefore, we propose a RIP graph dot layout digital printing device and a printing method thereof. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a RIP graph dot layout digital printing device and a printing method thereof, which solves the problems in the background art.

[0007] The technical problems solved by the present application can be solved by the following technical solutions: A RIP graph dot layout digital printing device, comprising a printer body, a material carrying shaft and a winding shaft rotatably installed on the printer body, a fixed frame fixedly installed in the printer body, a sliding rail fixedly installed on the fixed frame, a sliding seat slidably installed on the sliding rail, a plurality of nozzles for printing fixedly installed on the sliding seat, a belt rotatably installed on the fixed frame and a driving device for driving the belt to move fixedly installed on the fixed frame, the sliding seat being fixedly installed on the belt, a bearing table for bearing a printing substrate fixedly installed on the fixed frame, and a pressure roller for preventing the substrate from curling arranged on both sides of the upper end of the bearing table. A baffle is fixedly installed on one side of the sliding seat, a sliding rod is slidably installed on the fixed frame, the sliding rod is located on the movement track of the baffle, a wedge-shaped block is arranged on the sliding rod, a second spring is fixedly connected between one side of the wedge-shaped block and the inner wall of the fixed frame, a magnetic block matched with the wedge-shaped block is arranged at the lower end of the wedge-shaped block, a telescopic rod is fixedly connected between the lower end of the magnetic block and the inner wall of the fixed frame, a magnetic seat magnetically attracted to the magnetic block is slidably installed in the fixed frame, a telescopic column is fixedly installed between one side of the magnetic seat and the inner wall of the fixed frame, a rotating shaft is rotatably installed on the magnetic seat, a plurality of cleaning rollers for cleaning the ink at the bottom of the nozzle are arranged on the rotating shaft, and the cleaning rollers are one-to-one corresponding to the nozzles.

[0008] In one preferred embodiment of the present application, the sliding rod penetrates through the wedge-shaped block and is in sliding connection therewith, one end of the sliding rod is fixedly provided with a magnetic plate, one side of the magnetic plate is fixedly connected with the inner wall of the fixed frame through a first spring, one side of the wedge-shaped block is fixedly provided with a magnetic ring which is magnetically attracted to the magnetic plate, the upper end of the wedge-shaped block is transversely and slidably provided with an expansion block, and the inner wall of the top of the fixed frame is provided with a clamping groove for limiting the expansion block.

[0009] In one preferred embodiment of the present application, the clamping groove is triangularly arranged, a limiting block and a triangular block are fixedly arranged inside the clamping groove, the limiting block is also triangularly arranged, the upper end of the limiting block is recessed, the lower end of the limiting block is inclined, the triangular block corresponds to the recess of the upper end of the limiting block, and two guide blocks for enabling the expansion block to move in one direction are fixedly arranged inside the clamping groove.

[0010] In one preferred embodiment of the present application, the magnetic attraction force between the magnetic plate and the magnetic ring is greater than the initial spring force of the second spring and smaller than the spring force of the second spring when the second spring is fully compressed.

[0011] In one preferred embodiment of the present application, the rotating shaft is arranged in multiple sections, the inner wall diameter of the cleaning roller is greater than the outer wall diameter of the rotating shaft, a plurality of third springs are fixedly connected between each cleaning roller and the corresponding end of the rotating shaft, the third springs are arranged in a ring shape, a pull rope is arranged inside the rotating shaft, the pull rope penetrates through each section of the rotating shaft and each cleaning roller in sequence, one end of the pull rope is rotatably connected with the rotating shaft, the other end of the pull rope penetrates out of the rotating shaft and is fixedly provided with a push plate, the push plate is fixedly connected with one side of the magnetic base through a fourth spring, and two pressure sensing members which cooperate with the push plate and are used for detecting the weight of the ink on the cleaning roller are fixedly arranged inside the fixed frame.

[0012] In one preferred embodiment of the present application, a magnetic rod is slidably arranged in each section of the rotating shaft, the adjacent two magnetic rods repel each other, each cleaning roller is provided with a positioning hole which cooperates with the magnetic rod, a plurality of magnetic strips which repel the magnetic rods are fixedly arranged on the fixed frame at both ends of the rotating shaft, and the pressure sensing members correspond to the magnetic strips on one side of the fixed frame and the initial end and the terminal end of the movement track of the rotating shaft, and correspond to the magnetic strips on the other side of the fixed frame and the middle section of the movement track of the rotating shaft.

[0013] In one preferred embodiment of the present application, a bottom cover for protecting the bottom of the nozzle is slidably arranged on the fixed frame, one end of the bottom cover is designed as an opening, the other end of the bottom cover is fixedly provided with a sliding plate, the sliding plate is located on the movement track of the magnetic base, a plurality of elastic rods are fixedly arranged between the lower end of the sliding plate and the inner wall of the bottom of the fixed frame, and the lower end of the magnetic base is wedge-shaped.

[0014] In a preferred embodiment of the present application, the rotating shaft is fixedly installed with a gear at one end, and the fixed frame is fixedly installed with a rack matched with the gear; the outer surface of the cleaning roller is made of a flexible water-absorbable material and is free of residue and hair.

[0015] A printing method of a RIP image dot layout digital printing device, specifically comprising the following steps: S1, checking each component in the printer body and ensuring that each component can work normally, selecting a suitable printing substrate and placing it on the loading shaft, and then fixing it to the winding shaft after passing through each component in the printer body; S2, preprocessing the printing file to standardize the source file and performing pre-press inspection through pre-checking software; S3, performing RIP core processing to match the input precision and generate halftone dots, and controlling the ink amount through a color conversion engine; S4, performing coordinated control of the printing equipment, driving the belt to reciprocate through the driving device, driving the nozzle to reciprocate through the slide, and controlling the loading shaft and the winding shaft to rotate synchronously to convey the printing substrate for continuous and accurate printing; S5, during the movement of the slide, the baffle on the slide pushes the slide rod to move into the fixed frame, the slide rod drives the wedge-shaped block to disengage from the limiting of the magnetic block, the magnetic block moves upward and aligns with the magnetic seat, the magnetic seat is attracted by the magnetic force of the magnetic block, driving the rotating shaft and the cleaning roller to move towards the magnetic block, the baffle pushes the slide rod once to make the cleaning roller move in one direction to clean the bottom of the nozzle, and the baffle pushes the slide rod twice to make the cleaning roller reciprocate once, after the movement of the magnetic seat is completed, the bottom cover is reset upward by the elastic force of the elastic rod to protect the nozzle, when the rotating shaft and the cleaning roller are not moving, the magnetic strip on the corresponding side of the fixed frame aligns with the magnetic rod, and the magnetic rod moves synchronously in the opposite direction of the pressure sensing piece, the magnetic rod no longer inserts into the positioning hole, the weight of the ink drives the cleaning roller to move downward, the cleaning roller pulls the pull rope, the pull rope drives the push plate to move towards the magnetic seat 21, and the pressure sensing piece senses no pressure, indicating that there is too much ink accumulated at the bottom of the nozzle due to the blockage of the nozzle, during the cleaning process of the cleaning roller, the magnetic rod is repelled by the magnetic force of the magnetic strip on the other side of the fixed frame, and the magnetic rod moves towards the other end of the rotating shaft and penetrates through the corresponding positioning hole, so that the cleaning roller can rotate synchronously with the rotating shaft during the cleaning process; S6, online detection of the printed product, feedback of the dot analysis to the RIP automatic parameter compensation system for parameter adjustment, forming a quality closed-loop control.

[0016] In a preferred embodiment of the present application, adjacent nozzles of the plurality of nozzles are arranged in a left-right staggered manner, and the vertical direction of the adjacent nozzles of the plurality of nozzles is arranged in a sequentially close manner, and the arrangement of the nozzles of the plurality of nozzles adopts the layout mode of 2Bit_uv_E3 dots.

[0017] Compared with the prior art, the present application has the following beneficial effects: The present application discloses a RIP graph dot layout digital printing device, which drives the belt to move forward and reversely by a driving device, drives the slide to reciprocate on the slide rail by the slide, and rotates the winding shaft and the material loading shaft synchronously to convey the printing substrate, so that the printing part of the substrate is matched with the position of the nozzle to realize efficient printing.

[0018] The printing device drives the nozzle to reciprocate by the slide to perform printing work, and pushes the slide rod into the fixed frame by the baffle on the slide, so that the slide rod drives the wedge-shaped block to be separated from the limiting of the magnetic block, the magnetic block is pushed upward by the telescopic rod and is aligned with the magnetic base, the magnetic base is attracted by the magnetic force of the magnetic block, drives the rotating shaft and the cleaning roller to move toward the magnetic block, and the cleaning roller rotates continuously in the sliding process, so that the cleaning effect of the cleaning roller is improved, the lower wedge surface of the magnetic base drives the slide to move downward in the movement process of the magnetic base, does not affect the movement of the cleaning roller and the rotating shaft, and the bottom cover is reset upward by the elastic rod after the movement of the magnetic base, so that the nozzle is continuously protected.

[0019] The present application limits the telescopic block by the clamping groove, the cleaning roller can move in one direction to clean the bottom of the nozzle by the single pushing of the slide rod by the baffle, the cleaning roller moves back and forth once by the twice pushing of the slide rod by the baffle, the cleaning efficiency is improved while the cleaning is maintained, the normal operation of the printing device is not affected, the printing speed is not reduced, and the cleaning roller can be cleaned only after the movement of the nozzle, so that the color pollution between the nozzles is prevented due to the contact of one cleaning roller with multiple nozzles in the movement process of the slide.

[0020] The arrangement of the nozzles of the plurality of nozzles adopts the layout mode of 2Bit_uv_E3 dots, when printing the RIP graph, the diameter of the ink droplet is increased and the irregular dot arrangement mode is adopted, when the gap between the two interpenetrating nozzles is caused due to the installation precision, the 2Bit_uv_E3 dot can effectively cover the gap, so that the problem of the printed pattern with a string is solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The disclosure of the present application is described with reference to the accompanying drawings; it should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application; in the drawings, the same reference signs are used to refer to the same parts. Among them: Figure 1 It is a structural schematic view of the printer body of the digital printing device of the present application.

[0022] Figure 2 The structure diagram of the digital printing device of the present application.

[0023] Figure 3 The structure diagram of the slide rail and slide base of the digital printing device of the present application.

[0024] Figure 4 The structure diagram of the fixed frame of the digital printing device of the present application.

[0025] Figure 5 The structure diagram of the magnetic plate and magnetic ring of the digital printing device of the present application.

[0026] Figure 6 The structure diagram of the clamping groove of the digital printing device of the present application.

[0027] Figure 7 The structure diagram of the slide plate and magnetic base of the digital printing device of the present application.

[0028] Figure 8 The structure diagram of the rotating shaft and magnetic base of the digital printing device of the present application.

[0029] Figure 9 The structure diagram of the A area of the present application. Figure 8

[0030] Figure 10 The structure diagram of the gear and rack of the digital printing device of the present application.

[0031] Figure 11 The structure diagram of the pull rope of the digital printing device of the present application.

[0032] Figure 12 The structure diagram of the magnetic strip of the digital printing device of the present application.

[0033] Figure 13 The structure diagram of the dot layout of the print head of the digital printing device of the present application.

[0034] Reference signs: 1, printer body; 2, loading shaft; 3, winding shaft; 4, fixed frame; 5, slide rail; 6, slide base; 7, driving device; 8, belt; 9, print head; 10, bearing table; 11, compression roller.

[0035] 12, baffle; 13, slide rod; 14, magnetic plate; 15, first spring; 16, wedge block; 17, magnetic ring; 18, second spring; 19, magnetic block; 20, telescopic rod; 21, magnetic base; 22, telescopic column.

[0036] ​23, telescopic block; 24, clamping groove; 25, limiting block; 26, guide block; 27, triangular block; 28, bottom cover; 29, sliding plate; 30, elastic rod.

[0037] 31, rotating shaft; 32, cleaning roller; 33, third spring; 34, gear; 35, rack; 36, pull rope; 37, fourth spring; 38, push plate; 39, pressure sensing part; 40, magnetic rod; 41, positioning hole; 42, magnetic strip. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] Please refer to Figures 1-12 The present application provides a RIP map dot layout digital printing device, which comprises a printer body 1, a material loading shaft 2 and a winding shaft 3 rotatably installed on the printer body 1, a fixed frame 4 fixedly installed in the printer body 1, a sliding rail 5 fixedly installed on the fixed frame 4, a sliding seat 6 slidably installed on the sliding rail 5, a plurality of nozzles 9 for printing fixedly installed on the sliding seat 6, a belt 8 movably installed on the fixed frame 4 and fixedly installed with a driving device 7 for driving the belt 8 to move, the sliding seat 6 being fixedly installed on the belt 8, a bearing table 10 for bearing a printing substrate fixedly installed on the fixed frame 4, and a pressure roller 11 for preventing the substrate from curling arranged on both sides of the upper end of the bearing table 10.

[0040] When printing, the driving device 7 drives the belt 8 to move forward and reversely, so that the sliding seat 6 drives the nozzles 9 to reciprocate on the sliding rail 5, and the winding shaft 3 and the material loading shaft 2 synchronously rotate to convey the printing substrate, the printing position of the substrate is controlled to match the position of the nozzles 9, and high-efficiency printing is realized.

[0041] Further, the sliding seat 6 is fixedly installed with a baffle 12 on one side, the fixed frame 4 is slidably installed with a sliding rod 13, the sliding rod 13 is located on the movement track of the baffle 12, the sliding rod 13 is provided with a wedge-shaped block 16, the wedge-shaped block 16 is fixedly connected with the second spring 18 between one side and the inner wall of the fixed frame 4, the wedge-shaped block 16 is provided with a magnetic block 19 matched therewith at the lower end, the magnetic block 19 is fixedly connected with the telescopic rod 20 between the lower end and the inner wall of the fixed frame 4, the fixed frame 4 is slidably installed with a magnetic seat 21 magnetically attracted to the magnetic block 19, the magnetic seat 21 is fixedly installed with the telescopic column 22 between one side and the inner wall of the fixed frame 4, the magnetic seat 21 is rotatably installed with the rotating shaft 31, the rotating shaft 31 is provided with a plurality of cleaning rollers 32 for cleaning the ink at the bottom of the nozzle 9, and the cleaning roller 32 corresponds to the nozzle 9 one by one.

[0042] Further, the outer surface of the cleaning roller 32 is made of a flexible water-absorbing material and does not fall off residue or hair; the ink at the bottom of the nozzle 9 can be wiped off without leaving impurities to affect the printing quality.

[0043] Further, the fixed frame 4 is slidably installed with a bottom cover 28 for protecting the bottom of the nozzle 9, one end of the bottom cover 28 is designed as an opening, the other end is fixedly installed with a sliding plate 29, the sliding plate 29 is located on the movement track of the magnetic seat 21, and a plurality of elastic rods 30 are fixedly installed between the lower end of the sliding plate 29 and the inner wall of the bottom of the fixed frame 4, and the lower end of the magnetic seat 21 is provided with a wedge shape on both sides.

[0044] Further, the rotating shaft 31 is fixedly installed with a gear 34 at one end, and the fixed frame 4 is fixedly installed with a rack 35 matched with the gear 34.

[0045] Specifically, the nozzle 9 reciprocating sliding once can print the corresponding part of the substrate below, after each printing is completed, the nozzle 9 will continue to move to one side by a distance and stay for a period of time, waiting for the unprinted substrate to be conveyed below, in the process of continuing to move, the baffle 12 on the sliding seat 6 will contact the sliding rod 13, and the sliding rod 13 will be pushed into the fixed frame 4, the sliding rod 13 will drive the wedge-shaped block 16 to move synchronously, and after the movement of the sliding seat 6 and the nozzle 9 is completed, the wedge-shaped block 16 will be separated from the limiting of the magnetic block 19, the magnetic block 19 will be pushed upward by the telescopic rod 20, in the initial state, as shown in the figure Figure 7As shown, the magnetic block 19 is not aligned with the magnetic base 21, and the magnetic block 19 and the magnetic base 21 are not attracted to each other, and the telescopic column 22 remains in the retracted state. When the magnetic block 19 moves upward, it will be aligned with the magnetic base 21, and the magnetic base 21 will be attracted by the magnetic force of the magnetic block 19, which will drive the rotating shaft 31 and the cleaning roller 32 to move towards the magnetic block 19. At the same time, through the cooperation of the gear 34 and the rack 35, the cleaning roller 32 and the rotating shaft 31 rotate during sliding, which improves the cleaning effect of the cleaning roller 32. When the nozzle 9 moves to the end, the bottom cover 28 will be located below the nozzle 9 to protect the nozzle 9. During the movement of the magnetic base 21, through the cooperation of the wedge surface at the lower end of the magnetic base 21 and the sliding plate 29, the sliding plate 29 will drive the bottom cover 28 to move downward against the elastic force of the elastic rod 30, without affecting the movement of the cleaning roller 32 and the rotating shaft 31. After the movement of the magnetic base 21 is completed, the bottom cover 28 will be reset upward by the elastic force of the elastic rod 30, continuing to protect the nozzle 9. This prevents impurities or dust from adhering to the bottom of the nozzle 9 during the operation of the internal equipment of the printer body 1, which affects the printing effect. It can continuously protect the nozzle 9 when it is stopped, reducing the pollution of the bottom of the nozzle 9 and reducing the blockage caused by ink evaporation.

[0046] In combination Figures 2 to 6 In the preferred embodiment, the slide rod 13 penetrates the wedge block 16 and is in sliding connection with it. One end of the slide rod 13 is fixedly installed with a magnetic plate 14. One side of the magnetic plate 14 is fixedly connected with a first spring 15 between the inner wall of the fixed frame 4. One side of the wedge block 16 is fixedly installed with a magnetic ring 17 that is magnetically attracted to the magnetic plate 14. The upper end of the wedge block 16 is transversely slidably installed with a telescopic block 23. The top inner wall of the fixed frame 4 is provided with a clamping groove 24 for limiting the telescopic block 23.

[0047] Further, the clamping groove 24 is triangularly arranged, and a limiting block 25 and a triangular block 27 are fixedly installed inside it. The limiting block 25 is also triangularly arranged, and its upper end is recessed and its lower end is inclined. The triangular block 27 corresponds to the recess of the upper end of the limiting block 25. Two guide blocks 26 for allowing the telescopic block 23 to move in one direction are fixedly installed inside the clamping groove 24.

[0048] Further, the magnetic attraction between the magnetic plate 14 and the magnetic ring 17 is greater than the initial state elastic force of the second spring 18 and less than the compressed state elastic force of the second spring 18.

[0049] Specifically, during the movement of the slide rod 13 and the wedge block 16, because the magnetic attraction between the magnetic plate 14 and the magnetic ring 17 is greater than the initial state elastic force of the second spring 18, the slide rod 13 can drive the wedge block 16 to move together in the initial state. At the same time, the telescopic block 23 will slide along the clamping groove 24 and slide transversely on the upper end of the wedge block 16, as shown in the attached Figure 6As shown, since the lower end of the limiting block 25 is inclined, the telescopic block 23 will always move to the right after contacting the limiting block 25, and will retract when passing the guide block 26, and will pop out and reset after passing. The guide block 26 will limit the telescopic block 23, preventing it from moving in the opposite direction, so that the telescopic block 23 can only move in one direction along the clamping groove 24. When the slide rod 13 and the wedge block 16 have moved, the magnetic attraction between the magnetic plate 14 and the magnetic ring 17 is smaller than the elastic force of the second spring 18 in the compressed state. At this time, the elastic force of the second spring 18 will push the wedge block 16 to slide in the opposite direction on the slide rod 13, and the telescopic block 23 will move to the upper end of the limiting block 25 and be unable to reset, so that the magnetic block 19 is continuously aligned with the magnetic seat 21, and the cleaning roller 32 cannot slide back to reset. When the nozzle 9 performs the next printing, the slide rod 13 is released from the limiting, the magnetic plate 14 will again be in close contact with the magnetic ring 17 on the wedge block 16, and the slide rod 13 cannot be completely reset. When the nozzle 9 finishes printing again, the slide rod 13 will be pushed again. At this time, the slide rod 13 will move the wedge block 16 again, and the telescopic block 23 will move to the left under the limiting of the lower end of the triangular block 27. When the slide rod 13 has moved, the second spring 18 will push the wedge block 16 to slide on the slide rod 13. At this time, the telescopic block 23 will enter the left side of the clamping groove 24 under the limiting of the guide block 26, the wedge block 16 can drive the telescopic block 23 to reset to the initial state, and the lower inclined surface of the wedge block 16 will cooperate with the upper end of the magnetic block 19 to make the magnetic block 19 move downward to reset. The magnetic block 19 is no longer aligned with the magnetic seat 21, and the magnetic seat 21 is pulled to reset by the elastic force of the telescopic column 22.

[0050] The telescopic block is limited by the clamping groove, and the bottom cover 28 is moved downward again without affecting the cleaning of the cleaning roller 32. The single push of the baffle 12 on the slide rod 13 can make the cleaning roller 32 move in one direction to clean the bottom of the nozzle 9. The baffle 12 pushes the slide rod 13 twice to make the cleaning roller 32 move back and forth once, which maintains cleaning while improving cleaning efficiency, does not affect the normal operation of the printing equipment, and does not reduce the printing speed. Moreover, the cleaning roller 32 can only be cleaned after the nozzle 9 has moved, preventing a cleaning roller 32 from contacting multiple nozzles 9 during the movement of the slide seat 6, which causes color pollution between the nozzles 9.

[0051] In combination Figures 7 to 12In this preferred embodiment, the rotating shaft 31 is arranged in multiple segments, and the inner diameter of the cleaning roller 32 is larger than the outer diameter of the rotating shaft 31. Each cleaning roller 32 is fixedly connected to a number of third springs 33 at the corresponding end of the rotating shaft 31. The third springs 33 are arranged in a ring. A pull rope 36 is provided inside the rotating shaft 31. The pull rope 36 passes through each segment of the rotating shaft 31 and each cleaning roller 32 in sequence. One end of the pull rope 36 is rotatably connected to the rotating shaft 31, and the other end passes out of the rotating shaft 31 and is fixedly installed with a push plate 38. A fourth spring 37 is fixedly connected to one side of the push plate 38 and the magnetic base 21. Two pressure sensors 39 that cooperate with the push plate 38 and are used to detect the weight of ink on the cleaning roller 32 are fixedly installed inside the fixing frame 4.

[0052] In this preferred embodiment, a magnetic rod 40 is slidably installed in each section of the rotating shaft 31, and the magnetic repulsion between two adjacent magnetic rods 40 is achieved. Each cleaning roller 32 is provided with a positioning hole 41 that cooperates with the magnetic rod 40. Several magnetic strips 42 that are magnetically repulsive to the magnetic rod 40 are fixedly installed on the fixing brackets 4 at both ends of the rotating shaft 31. The magnetic strips 42 on one side of the fixing bracket 4 of the pressure sensing element 39 correspond to the initial end and the end end of the movement trajectory of the rotating shaft 31, while the magnetic strips 42 on the other side of the fixing bracket 4 correspond to the middle section of the movement trajectory of the rotating shaft 31.

[0053] Specifically, when the rotating shaft 31 and the cleaning roller 32 are not moving, the magnetic strip 42 on the fixing bracket 4 on the corresponding side of the pressure sensing element 39 will align with the magnetic rod 40. Because adjacent magnetic rods 40 repel each other, they will move synchronously in the opposite direction to the pressure sensing element 39, and the magnetic rod 40 will no longer be inserted into the positioning hole 41. Since the inner diameter of the cleaning roller 32 is larger than the outer diameter of the rotating shaft 31, when the cleaning roller 32 absorbs a large amount of ink, such as... Figure 11 As shown, the weight of the ink will cause the cleaning roller 32 to move downwards. The cleaning roller 32 will pull the pull rope 36, causing the middle section of the pull rope 36 to bend. The pull rope 36 will then pull the push plate 38 towards the magnetic base 21, compressing the fourth spring 37. The push plate 38 will no longer contact the pressure sensor 39. After the cleaning roller 32 has finished moving, the corresponding pressure sensor 39 will no longer sense pressure, indicating that there is excessive blockage in the printhead 9, preventing normal ink ejection and causing excessive ink accumulation at the bottom of the printhead 9. During the cleaning process of the cleaning roller 32, the magnetic rod 40 will be subjected to the magnetic repulsion force of the magnetic strip 42 on the other side of the fixing frame 4, as shown in the attached diagram. Figure 12 As shown, the magnetic rods 40 will all move toward the other end of the rotating shaft 31 and pass through the corresponding positioning holes 41, so that the cleaning roller 32 can rotate synchronously with the rotating shaft 31 during the cleaning process to maintain the cleaning effect. After each cleaning, the weight of ink on the cleaning roller 32 can be detected, and the nozzle 9 can be detected and repaired in time to prevent the printing effect from being consistently poor.

[0054] When printing, the forward and reverse movement of the belt 8 driven by the driving device 7 drives the slide 6 to drive the nozzle 9 to reciprocate on the slide rail 5, and the winding shaft 3 and the material carrying shaft 2 rotate synchronously to convey the printing substrate, control the printing position of the substrate to match the position of the nozzle 9, realize efficient printing, and the nozzle 9 can print the corresponding part of the substrate below once the slide reciprocates once. After each printing is completed, the nozzle 9 will continue to move to one side by a distance and stay for a period of time, waiting for the unprinted substrate to be conveyed to the lower side.

[0055] During the continuous movement of the nozzle 9, the baffle 12 on the slide 6 will contact the slide rod 13 and push the slide rod 13 into the fixed frame 4. The slide rod 13 drives the wedge block 16 to move synchronously, and after the movement of the slide 6 and the nozzle 9 is completed, the wedge block 16 is separated from the limiting of the magnetic block 19. The magnetic block 19 is pushed upward by the telescopic rod 20 and aligned with the magnetic base 21. The magnetic base 21 is attracted by the magnetic force of the magnetic block 19, which drives the rotating shaft 31 and the cleaning roller 32 to move towards the magnetic block 19. During the movement of the magnetic base 21, the slide plate 29 drives the bottom cover 28 to move downward, without affecting the movement of the cleaning roller 32 and the rotating shaft 31. After the movement of the magnetic base 21 is completed, the bottom cover 28 is reset upward by the elastic force of the elastic rod 30, and the protection of the nozzle 9 is continued.

[0056] During the movement of the slide rod 13 and the wedge block 16, the telescopic block 23 will always move to the right after contacting the limiting block 25. When the slide rod 13 and the wedge block 16 move, the elastic force of the second spring 18 will push the wedge block 16 to slide reversely on the slide rod 13. The telescopic block 23 will move to the recess at the upper end of the limiting block 25 and be stuck and cannot be reset, so that the magnetic block 19 is continuously aligned with the magnetic base 21. The cleaning roller 32 cannot slide reversely to reset. When the nozzle 9 prints again, the slide rod 13 will be pushed again. At this time, the slide rod 13 will drive the wedge block 16 to move together. The telescopic block 23 is limited by the lower end of the triangular block 27 and moves to the left. When the slide rod 13 moves, the second spring 18 will push the wedge block 16 to slide on the slide rod 13 again. At this time, the telescopic block 23 receives the limiting of the guide block 26 and enters the left side of the clamping groove 24. The wedge block 16 can drive the telescopic block 23 to reset to the initial state. At the same time, the magnetic block 19 moves downward to reset and is no longer aligned with the magnetic base 21. The magnetic base 21 is pulled to reset by the elastic force of the telescopic column 22, and the bottom cover 28 moves downward again without affecting the cleaning of the cleaning roller 32. The baffle 12 can make the cleaning roller 32 move unidirectionally to clean the bottom of the nozzle 9 by pushing the slide rod 13 twice. When the rotating shaft 31 and the cleaning roller 32 do not move, the magnetic strip 42 on the corresponding side of the fixed frame 4 will be aligned with the magnetic rod 40.

[0057] After the cleaning roller movement is completed, the magnetic rod 40 moves synchronously in the opposite direction of the pressure sensing part 39, and the magnetic rod 40 is no longer inserted into the positioning hole 41. When the cleaning roller 32 absorbs more ink, the weight of the ink will drive the cleaning roller 32 to move downward, the cleaning roller 32 will pull the pull rope 36, and the middle section of the pull rope 36 will be bent, the pull rope 36 will pull the push plate 38 to move towards the magnetic base 21; and the push plate 38 no longer contacts the pressure sensing part 39, after the cleaning roller 32 movement is completed, the corresponding pressure sensing part 39 will not sense pressure, indicating that there is a situation that the inkjet head 9 is blocked too much and cannot normally jet ink, resulting in too much ink accumulated at the bottom of the inkjet head 9. During the cleaning process of the cleaning roller 32, the magnetic rod 40 will be repelled by the magnetic strip 42 on the other side of the fixed frame 4, and the magnetic rod 40 will move to the other end of the rotating shaft 31 and penetrate the corresponding positioning hole 41, so that the cleaning roller 32 can rotate synchronously with the rotating shaft 31 during the cleaning process, and the cleaning effect is maintained.

[0058] In the preferred embodiment, a printing method of a RIP graph dot layout digital printing device is provided, which specifically includes the following steps: S1, check each component in the printer body 1 and ensure that each component can work normally, select a suitable printing substrate and place it on the loading shaft 2, pass the printing substrate through each component in the printer body 1, and finally fix it to the winding shaft 3; S2, pre-process the printing file to standardize the source file and perform pre-press inspection through pre-check software; S3, perform RIP core processing to match input precision and generate halftone dots, and control ink volume through a color conversion engine; S4, perform printing equipment cooperative control, drive the belt 8 to reciprocate through the driving device 7, drive the inkjet head 9 to reciprocate and print through the sliding seat 6, and control the loading shaft 2 and the winding shaft 3 to rotate synchronously to convey the printing substrate, thereby accurately and continuously printing; S5, during the movement of the sliding seat 6, the upper baffle 12 pushes the sliding rod 13 to move into the fixed frame 4, the sliding rod 13 drives the wedge-shaped block 16 to disengage from the limiting of the magnetic block 19, the magnetic block 19 moves upward and aligns with the magnetic base 21, the magnetic base 21 is attracted by the magnetic force of the magnetic block 19, drives the rotating shaft 31 and the cleaning roller 32 to move towards the magnetic block 19, the baffle 12 pushes the sliding rod 13 once to enable the cleaning roller 32 to move in one direction to clean the bottom of the nozzle 9, and the baffle 12 pushes the sliding rod 13 twice to enable the cleaning roller 32 to move back and forth once; after the movement of the magnetic base 21 is completed, the bottom cover 28 is reset upward by the elastic force of the elastic rod 30 to protect the nozzle 9; when the rotating shaft 31 and the cleaning roller 32 do not move, the magnetic strip 42 on the corresponding side of the fixed frame 4 is aligned with the magnetic rod 40, and the magnetic rod 40 moves in the opposite direction of the pressure sensing piece 39 synchronously, and the magnetic rod 40 is no longer inserted into the positioning hole 41; the weight of the ink drives the cleaning roller 32 to move downward, the cleaning roller 32 pulls the pull rope 36, the pull rope 36 pulls the push plate 38 to move towards the magnetic base 21, and the pressure sensing piece 39 cannot sense the pressure, which indicates that there is a condition that the nozzle 9 is blocked too much to normally spray ink, resulting in that the ink is accumulated too much at the bottom of the nozzle 9; during the cleaning process of the cleaning roller 32, the magnetic rod 40 is repelled by the magnetic force of the magnetic strip 42 on the other side of the fixed frame 4, and the magnetic rod 40 moves to the other end of the rotating shaft 31 and penetrates through the corresponding positioning hole 41, so that the cleaning roller 32 can rotate synchronously with the rotating shaft 31 during the cleaning process; S6, the printed products are detected on line, the dot analysis is fed back to the RIP automatic parameter compensation system to adjust the parameters, and quality closed loop control is formed.

[0059] Further, in combination with Figure 13 In the preferred embodiment, the adjacent nozzles of the plurality of nozzles 9 are arranged in a left-right staggered manner, the vertical direction of the adjacent nozzles of the plurality of nozzles 9 is arranged in a sequentially close manner, and the nozzle arrangement of the plurality of nozzles 9 adopts a 2Bit_uv_E3 dot layout mode.

[0060] Specifically, in the 2Bit_uv_E3 dot layout mode, the adjacent nozzles of the plurality of nozzles are arranged in a left-right staggered manner with unequal intervals; the vertical direction positions of the nozzles of the plurality of nozzles are sequentially and closely arranged, that is, the horizontal line between the bottom end point of the previous nozzle and the top end point of the next nozzle is closely arranged or coincides.

[0061] When the printing RIP picture is printed, the size and arrangement of the dots are changed to compensate for the gap between the nozzles, so that the problem of silk drawing of the Seiko nozzle is solved; the Seiko nozzle has a long service life and high printing precision, and the application of the Seiko nozzle in the label industry can further improve the performance of the equipment.

[0062] The arrangement of the nozzle holes of the several nozzles above adopts the layout mode of 2Bit_uv_E3 dots. When printing a RIP picture, the diameter of the ink drops is increased and the irregular dot arrangement mode is adopted. When the two interpenetrating nozzle holes have a gap due to installation precision, the 2Bit_uv_E3 dots can effectively cover the gap, thereby solving the problem of the drawn pattern having a stringing problem. The singlepass printing pattern is formed at one time, the productivity is high, and the stringing problem does not need to be compensated by the multi-PASS printing coverage of the scanning machine.

[0063] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principles of the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A digital printing device for RIP dot layout, comprising a printer body (1), a material carrier shaft (2) and a take-up shaft (3) rotatably mounted on the printer body (1), characterized in that: A fixed frame (4) is fixedly installed inside the printer body (1). A slide rail (5) is fixedly installed on the fixed frame (4). A slide block (6) is slidably installed on the slide rail (5). Several printheads (9) for printing are fixedly installed on the slide block (6). A belt (8) is driven on the fixed frame (4), and a drive device (7) for driving the belt (8) is fixedly installed. The slide block (6) is fixedly installed on the belt (8). A support platform (10) for supporting the printing substrate is fixedly installed on the fixed frame (4). Pressure rollers (11) for preventing the substrate from curling are provided on both sides of the upper end of the support platform (10). A baffle (12) is fixedly installed on one side of the slide block (6), and a slide rod (13) is slidably installed on the fixing frame (4). The slide rod (13) is located on the movement trajectory of the baffle (12). A wedge block (16) is provided on the slide rod (13). A second spring (18) is fixedly connected between one side of the wedge block (16) and the inner wall of the fixing frame (4). A magnetic block (19) is provided at the lower end of the wedge block (16) to cooperate with it. The lower end of the magnetic block (19) is connected to the fixing frame (4). A telescopic rod (20) is fixedly connected between the inner walls of the fixed frame (4). A magnetic seat (21) that is magnetically attracted to the magnetic block (19) is slidably installed inside the fixed frame (4). A telescopic column (22) is fixedly installed between one side of the magnetic seat (21) and the inner wall of the fixed frame (4). A rotating shaft (31) is rotatably installed on the magnetic seat (21). Several cleaning rollers (32) for cleaning the ink at the bottom of the nozzle (9) are provided on the rotating shaft (31). The cleaning rollers (32) correspond one-to-one with the nozzle (9).

2. The RIP dot layout digital printing device according to claim 1, characterized in that: The slide rod (13) passes through the wedge block (16) and is slidably connected to it. A magnetic plate (14) is fixedly installed at one end of the slide rod (13). A first spring (15) is fixedly connected between one side of the magnetic plate (14) and the inner wall of the fixing frame (4). A magnetic ring (17) that is attracted to the magnetic plate (14) is fixedly installed on one side of the wedge block (16). A telescopic block (23) is slidably installed on the upper end of the wedge block (16). A snap-fit ​​groove (24) for limiting the telescopic block (23) is provided on the inner wall of the top of the fixing frame (4).

3. The RIP dot layout digital printing device according to claim 2, characterized in that: The snap-fit ​​groove (24) is triangular in shape, and a limiting block (25) and a triangular block (27) are fixedly installed inside it. The limiting block (25) is also triangular in shape, with its upper end recessed and its lower end inclined. The upper end of the triangular block (27) is recessed in relation to the limiting block (25). Two guide blocks (26) for making the telescopic block (23) move in one direction are fixedly installed inside the snap-fit ​​groove (24).

4. The RIP dot layout digital printing device according to claim 3, characterized in that: The magnetic attraction between the magnetic plate (14) and the magnetic ring (17) is greater than the initial elastic force of the second spring (18) and less than the elastic force of the second spring (18) after compression.

5. A digital printing device for RIP dot layout according to claim 4, characterized in that: The rotating shaft (31) is arranged in multiple segments, and the inner diameter of the cleaning roller (32) is larger than the outer diameter of the rotating shaft (31). Each cleaning roller (32) is fixedly connected to a number of third springs (33) at the corresponding end of the rotating shaft (31). The third springs (33) are arranged in a ring. A pull rope (36) is provided inside the rotating shaft (31). The pull rope (36) passes through each segment of the rotating shaft (31) and each cleaning roller (32) in sequence. One end of the pull rope (36) is rotatably connected to the rotating shaft (31), and the other end passes through the rotating shaft (31) and is fixedly installed with a push plate (38). A fourth spring (37) is fixedly connected to one side of the push plate (38) and the magnetic base (21). Two pressure sensors (39) that cooperate with the push plate (38) and are used to detect the weight of ink on the cleaning roller (32) are fixedly installed inside the fixing frame (4).

6. The RIP dot layout digital printing device according to claim 5, characterized in that: Each section of the rotating shaft (31) is equipped with a magnetic rod (40) that is slidably installed inside. Adjacent magnetic rods (40) are magnetically repelled. Each cleaning roller (32) is provided with a positioning hole (41) that cooperates with the magnetic rod (40). Several magnetic strips (42) that are magnetically repelled by the magnetic rod (40) are fixedly installed on the fixing frames (4) at both ends of the rotating shaft (31). The magnetic strips (42) on one side of the fixing frame (4) of the pressure sensing element (39) correspond to the initial end and the end of the movement trajectory of the rotating shaft (31), and the magnetic strips (42) on the other side of the fixing frame (4) correspond to the middle section of the movement trajectory of the rotating shaft (31).

7. A digital printing device for RIP dot layout according to claim 6, characterized in that: A bottom cover (28) for protecting the bottom of the nozzle (9) is slidably installed on the fixed frame (4). One end of the bottom cover (28) is open, and a sliding plate (29) is fixedly installed on the other end. The sliding plate (29) is located on the movement trajectory of the magnetic base (21), and several elastic rods (30) are fixedly installed between the lower end of the sliding plate (29) and the inner wall of the bottom of the fixed frame (4). Both sides of the lower end of the magnetic base (21) are set in a wedge shape.

8. The RIP dot layout digital printing device according to claim 7, characterized in that: A gear (34) is fixedly installed at one end of the rotating shaft (31), and a rack (35) that cooperates with the gear (34) is fixedly installed inside the fixing frame (4); the outer surface of the cleaning roller (32) is made of a flexible water-absorbing material, and it does not shed lint or slag.

9. A printing method for a RIP dot layout digital printing device, characterized in that: The printing method using the RIP dot layout digital printing device as described in claim 8 specifically includes the following steps: S1. Inspect each component inside the printer body (1) and ensure that each component can work normally. Select a suitable printing substrate and place it on the carrier shaft (2). Pass the printing substrate flat through each component inside the printer body (1) and finally fix it to the take-up shaft (3). S2. Preprocess the print file to standardize the source file and perform pre-press inspection using pre-inspection software; S3. Perform RIP core processing to match input precision, generate halftone dots, and control ink volume through the color conversion engine. S4. Perform coordinated control of printing equipment. Drive the belt (8) through the drive device (7) to reciprocate, so that the slide (6) drives the nozzle (9) to reciprocate and print. Control the material carrier shaft (2) and the take-up shaft (3) to rotate synchronously to transport the printing substrate, thereby accurately performing continuous printing. S5. During the movement of the slide (6), its upper baffle (12) pushes the slide rod (13) into the fixed frame (4). The slide rod (13) drives the wedge block (16) to disengage from the limit on the magnetic block (19). The magnetic block (19) moves upward and aligns with the magnetic seat (21). The magnetic seat (21) is attracted by the magnetic force of the magnetic block (19), which drives the rotating shaft (31) and the cleaning roller (32) to move towards the magnetic block (19). The baffle (12) pushes once. The movable slide bar (13) enables the cleaning roller (32) to move in one direction to clean the bottom of the nozzle (9). The baffle (12) pushes the slide bar (13) twice to make the cleaning roller (32) reciprocate once. After the magnetic seat (21) finishes moving, the bottom cover (28) will be reset upward by the elastic force of the elastic rod (30) to protect the nozzle (9). When the rotating shaft (31) and the cleaning roller (32) are not moving, the pressure sensor (39) detects the bottom of the nozzle. The magnetic strip (42) on one side of the fixed frame (4) will be aligned with the magnetic rod (40), and the magnetic rod (40) will move synchronously in the opposite direction to the pressure sensor (39). The magnetic rod (40) will no longer be inserted into the positioning hole (41). The weight of the ink will drive the cleaning roller (32) to move downward. The cleaning roller (32) will pull the pull rope (36), and the pull rope (36) will pull the push plate (38) to move towards the magnetic seat 21. The pressure sensor (39) cannot sense the pressure, indicating that there is too much blockage in the print head (9) and it cannot spray ink normally, resulting in too much ink accumulating at the bottom of the print head (9). During the cleaning process of the cleaning roller (32), the magnetic rod (40) will be subjected to the magnetic repulsion force of the magnetic strip (42) on the other side of the fixed frame (4). The magnetic rod (40) will move towards the other end of the rotating shaft (31) and pass through the corresponding positioning hole (41), so that the cleaning roller (32) can rotate synchronously with the rotating shaft (31) during the cleaning process. S6. Conduct online inspection of the printed products, analyze the dots, and feed the results back to the RIP automatic parameter compensation system for parameter adjustment, forming a closed-loop quality control.

10. The printing method of the RIP dot layout digital printing device according to claim 9, characterized in that: The adjacent nozzles of the several nozzles (9) are arranged in a staggered manner, the adjacent nozzles of the several nozzles (9) are arranged in a vertical manner in sequence, and the nozzles of the several nozzles (9) are arranged in a 2-bit uv-E3 dot pattern.

Images