A digital printing device with nozzle protection and cleaning device

Abstract

The present invention proposes a digital inkjet printing device with a nozzle protection and cleaning device, comprising a printing table, a slide rail is provided above the printing table, the slide rail is used to install the printing nozzle, a nozzle cleaning assembly is provided on the surface of the printing table, the nozzle cleaning assembly is connected to the nozzle protection assembly, the nozzle protection assembly is provided with an ultrasonic generator, a laser emitter and a laser receiver, and the nozzle protection assembly is provided with a liquid inlet component, a circulation component and a liquid outlet component respectively arranged and connected thereto; the present invention uses a sliding box to reciprocate in the cleaning box, so that the cleaning sponge inside the sliding box cooperates with the cleaning pipeline component and the recovery pipeline component to clean the ink on the surface of the printing nozzle to avoid clogging of the nozzle hole, and the nozzle protection assembly cooperates with the liquid inlet component, the circulation component and the liquid outlet component through the ultrasonic generator, laser emitter, laser receiver and heating plate inside it, so as to find the clogged nozzle hole and automatically clean it.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, in particular to a digital printing equipment with a nozzle protection and cleaning device. Background Art

[0002] Digital inkjet printing technology uses digital principles and jet technology to input various digital patterns into an electronic computer. After computer editing and processing, the control system controls the printhead to print various special dyes or inks directly onto the printing material to form the required pattern. The printhead is a key core component of digital inkjet printing equipment. Its performance directly affects the accuracy, speed and effect of printing. During the long-term use of the printhead, ink will adhere to the area around the nozzle of the printhead. When the ink adheres too much, the printhead may be blocked. Therefore, after the printhead has been used for a period of time, it needs to be cleaned to keep the area around the nozzle clean.

[0003] Based on the above situation, in the prior art, announcement number CN107639948A discloses a print head cleaning device and a digital printing machine, the print head cleaning device includes a moisturizing box arranged at the starting position of the print head, a driving device for driving the moisturizing box to move, the top of the moisturizing box is open, so that when the print head returns to the starting position, it docks with the top opening of the moisturizing box to form a closed space that seals the printing surface at the bottom of the print head, and also includes a scraper arranged in the moisturizing box and a water spray pipe arranged opposite to the scraper. The water spray pipe is provided with a water spray port arranged opposite to the scraper, and the water spray pipe is connected to a water supply system. The above-mentioned equipment is reasonably arranged in position and space by the moisturizing box, the scraper and the water spray pipe. While meeting the structural layout design of small space occupation and compact structure, it also realizes better cleaning of the print head, thereby avoiding clogging of the print head and better improving printing quality and printing efficiency.

[0004] However, in light of actual conditions, there are still some areas for improvement in the above-mentioned equipment. The cleaning device of the above-mentioned equipment mainly cleans the surface of the nozzle by spraying water mist or water flow through a water pipe, and uses a scraper to remove residues on the surface. However, for clogged nozzles, relying solely on this surface cleaning method may not be able to effectively unclog them. At the same time, although the water nozzles on the water pipe can cover the surface of the nozzle, the water spraying force and angle may not be sufficient to penetrate or flush away the blockage inside the nozzle. In addition, although the scraper can scrape off some surface dirt, its cleaning effect on the inside of the nozzle is limited. Summary of the Invention

[0005] In response to the technical defects in the background technology, the present invention proposes a digital printing device with a nozzle protection and cleaning device. In order to further solve the above technical problems and meet actual needs, the specific technical solution is as follows:

[0006] A digital printing device with a nozzle protection and cleaning device comprises a printing table, wherein the surface of the printing table is symmetrically provided with support boxes along the width direction, a fixedly connected slide rail is provided between the support boxes, the slide rail is provided with a slidingly matched printing nozzle, the surface of the printing nozzle is provided with a plurality of nozzle holes distributed in a rectangular array, the surface of the printing table is provided with a nozzle cleaning assembly at a position adjacent to the support box, the nozzle cleaning assembly is connected to the nozzle protection assembly, the nozzle cleaning assembly is provided with a cleaning box, the cleaning box is provided with a movably connected sliding box, a cleaning sponge is provided at the top position of the sliding box, a cleaning pipeline assembly and a recovery pipeline assembly connected to the cleaning sponge are provided inside the sliding box, the nozzle protection assembly is provided with a mounting box, the mounting box is provided with a movably connected mounting plate, the surface of the mounting plate is provided with a plurality of moisturizing rings corresponding to the positions of the nozzle holes, an ultrasonic generator, a laser transmitter and a laser receiver are correspondingly provided inside the moisturizing rings, and the moisturizing rings are respectively provided with a liquid inlet component, a circulation component and a liquid outlet component connected thereto.

[0007] Furthermore, sliding plates are provided on the left and right sides of the sliding box, and sliding grooves that can slide with the sliding plates are provided in the left and right side walls of the cleaning box. The sliding box is equipped with leak-proof side plates on the top, and a first electric cylinder is provided corresponding to the sliding plate. The telescopic end of the first electric cylinder is connected to the sliding plate, and the cylinder body of the first electric cylinder is connected to the mounting box.

[0008] Furthermore, a partition is provided inside the sliding box, the cleaning sponge is installed on the upper surface of the partition, the cleaning pipeline assembly and the recovery pipeline assembly are arranged below the partition, the cross-section of the cleaning sponge is wavy, and the cleaning sponge is provided with a protrusion and a recess.

[0009] Furthermore, the cleaning pipeline assembly includes a storage box, a delivery pump, and a delivery pipeline. The storage box and the delivery pump are arranged inside the sliding box. Delivery pipelines are set at both ends of the delivery pump. The liquid inlet end of the delivery pump is connected to the storage box through the delivery pipeline. The liquid outlet end of the delivery pump is connected to the cleaning sponge through the delivery pipeline. The delivery pipeline at the liquid outlet end of the delivery pump is provided with several liquid outlets, and the liquid outlets are arranged in the raised part of the cleaning sponge.

[0010] Furthermore, the recovery pipeline assembly includes a recovery box, a pumping pump and a recovery pipeline. The recovery box and the pumping pump are arranged inside the sliding box. Recovery pipelines are set at both ends of the pumping pump. The liquid outlet end of the pumping pump is connected to the recovery box through the recovery pipeline. The liquid inlet end of the pumping pump is connected to the cleaning sponge through the recovery pipeline. The recovery pipeline at the liquid inlet end of the pumping pump is provided with a plurality of liquid inlets, and the liquid inlets are arranged in the lower recess of the cleaning sponge.

[0011] Furthermore, an L-shaped plate is provided inside the mounting box, the mounting plate is arranged above the L-shaped plate, a second electric cylinder fixedly connected between the mounting plate and the L-shaped plate, a third electric cylinder is provided on one side of the L-shaped plate, the third electric cylinder is provided outside the mounting box, the telescopic rod end of the third electric cylinder passes through the side wall of the mounting box and is connected to the L-shaped plate, and the cylinder body of the third electric cylinder is connected to the mounting box.

[0012] Furthermore, the mounting plates are distributed in a rectangular array on the upper surface of the moisturizing ring, and the moisturizing rings are respectively enclosed by the mounting plates to form a number of moisturizing grooves. The moisturizing ring is provided with a vent near the top, and the ultrasonic generator is arranged at the top position of the inner ring of the moisturizing ring. The laser transmitter and the laser receiver are arranged relative to each other and staggered with the bottom center of the moisturizing groove, and a heating plate is installed at the bottom center of the moisturizing groove.

[0013] Furthermore, the liquid inlet component, circulation component and liquid outlet component are arranged between the L-shaped plate and the mounting plate, the liquid inlet component includes a liquid inlet pipe and a liquid inlet pump, the liquid inlet pump is connected to the moisturizing tank through the liquid inlet pipe, the circulation component includes a circulation pipe and a circulation pump, the liquid inlet end of the circulation pump is connected to the bottom of the moisturizing tank through the circulation pipe, the liquid outlet end of the circulation pump is connected to the moisturizing tank through the circulation pipe, the liquid outlet of the circulation pipe at the liquid outlet end of the circulation pump is arranged directly below the spray hole, the liquid outlet component includes a liquid outlet pipe and a liquid outlet pump, the liquid outlet pump is connected to the moisturizing tank through the liquid outlet pipe.

[0014] The beneficial effects of the present invention are:

[0015] The present invention can perform daily cleaning of the printing nozzle through the nozzle cleaning assembly. The first electric cylinder drives the sliding box to reciprocate in the cleaning box, so that the cleaning sponge inside the sliding box cooperates with the cleaning pipeline component and the recovery pipeline component, thereby cleaning the ink on the surface of the printing nozzle, keeping the area around the nozzle hole of the printing nozzle clean and avoiding clogging of the nozzle hole. The nozzle protection assembly cooperates with the liquid inlet component, circulation component and liquid outlet component through its internal ultrasonic generator, laser transmitter, laser receiver and heating plate to find the clogged nozzle hole and automatically clean it. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 Schematic diagram of the structures of the nozzle cleaning assembly and the nozzle protection assembly of the present invention.

[0018] Figure 3 Schematic diagram of the sliding box and cleaning sponge structure of the present invention.

[0019] Figure 4 A schematic diagram of the internal structure of the nozzle cleaning assembly of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the nozzle protection assembly of the present invention.

[0021] Figure 6 Schematic diagram of the internal structure of the nozzle protection assembly of the present invention.

[0022] Reference numerals: printing table 1, support box 11, slide rail 12, printing nozzle 13, slider 131, nozzle hole 132, nozzle cleaning assembly 2, cleaning box 21, sliding groove 211, sliding box 22, sliding plate 221, leak-proof side plate 222, partition 23, cleaning sponge 24, protrusion 241, recessed portion 242, cleaning pipeline assembly 25, storage box 251, delivery pump 252, delivery pipeline 253, recovery pipeline assembly 26, recovery box 261, pumping pump 26 2, recovery pipeline 263, first electric cylinder 27, nozzle protection assembly 3, mounting box 31, moisturizing ring 32, vent 321, moisturizing groove 33, L-shaped plate 34, third electric cylinder 341, mounting plate 35, second electric cylinder 36, ultrasonic generator 37, laser emitter 38, laser receiver 39, heating plate 30, liquid inlet component 4, liquid inlet pipe 41, liquid inlet pump 42, circulation component 5, circulation pipe 51, circulation pump 52, liquid outlet component 6, liquid outlet pipe 61, liquid outlet pump 62. DETAILED DESCRIPTION

[0023] like Figures 1 to 6 The present invention provides a technical solution: a digital printing device with a nozzle protection and cleaning device, comprising a printing table 1, wherein support boxes 11 are symmetrically arranged on the surface of the printing table 1 along the width direction, and slide rails 12 are fixedly connected between the support boxes 11. The slide rails 12 are provided with a slidingly matched printing nozzle 13, and the surface of the printing nozzle 13 is provided with a plurality of nozzle holes 132 distributed in a rectangular array. A nozzle cleaning component 2 is provided on the surface of the printing table 1 near the support box 11, and the nozzle cleaning component 2 is connected to the nozzle protection component 3. The nozzle cleaning component 2 is provided with a cleaning box 21, and the cleaning box 21 is provided with an movable A sliding box 22 is movably connected, a cleaning sponge 24 is provided at the top of the sliding box 22, a cleaning pipeline assembly 25 and a recovery pipeline assembly 26 connected to the cleaning sponge 24 are provided inside the sliding box 22, the nozzle protection assembly 3 is provided with a mounting box 31, the mounting box 31 is provided with a movably connected mounting plate 35, and the surface of the mounting plate 35 is provided with a plurality of moisturizing rings 32 corresponding to the positions of the spray holes 132, the moisturizing rings 32 are correspondingly provided with ultrasonic generators 37, laser transmitters 38 and laser receivers 39, and the moisturizing rings 32 are respectively provided with a liquid inlet component 4, a circulation component 5 and a liquid outlet component 6 connected thereto.

[0024] The present invention can perform daily cleaning on the printing nozzle 13. The slide rail 12 is driven by a servo motor. The printing nozzle 13 is provided with a slider 131 that can slide with the slide rail 12. The printing nozzle 13 moves back and forth under the drive of the slide rail 12, thereby printing a pattern on the substrate. When it is necessary to perform daily cleaning on the surface where the nozzle hole 132 of the printing nozzle 13 is located, the slide rail 12 drives the printing nozzle 13 to reset, so that the printing nozzle 13 moves to the top of the cleaning box 21, and then the nozzle cleaning component 2 cleans the area around the nozzle hole 132. The first electric cylinder 27 drives the sliding box 22 to reciprocate in the cleaning box 21, so that the raised portion 241 of the cleaning sponge 24 inside the sliding box 22 can clean and wipe the area around the nozzle hole 132 of the printing nozzle 13, and the cleaned oil The ink is absorbed by the cleaning sponge 24. During the wiping process, the cleaning pipe assembly 25 transports the cleaning liquid in the storage box 251 to the raised portion 241 of the cleaning sponge 24 through the delivery pump 252 and the delivery pipe 253, and moistens the raised portion 241 of the cleaning sponge 24, thereby increasing the cleaning effect of the raised portion 241 of the cleaning sponge 24. The cleaned ink flows into and gathers in the recessed portion 242 of the cleaning sponge 24. The recovery pipe assembly 26 pumps the waste liquid composed of the mixture of ink and cleaning liquid in the recessed portion 242 into the recovery box 261 for temporary storage through the pumping pump 262 and the recovery pipe 263, thereby cleaning the ink on the surface of the printing nozzle 13, keeping the area around the nozzle hole 132 of the printing nozzle 13 clean, and avoiding clogging of the nozzle hole 132.

[0025] In the present invention, the operation of the slide rail 12, the printing nozzle 13, the first electric cylinder 27, the third electric cylinder 341, the second electric cylinder 36, the ultrasonic generator 37, the laser emitter 38, the laser receiver 39, the heating plate 30, the delivery pump 252, the suction pump 262, the liquid inlet pump 42, the circulation pump 52, and the liquid outlet pump 62 are all controlled by the control system in an interconnected manner, so that the above components can operate in a coordinated manner.

[0026] The present invention can detect the nozzle hole 132 and dredge the blocked nozzle hole 132. During use, if the operator finds that the printed pattern has strips missing or the printing is unclear, it means that the nozzle hole 132 may be blocked. The operator can operate the control system to dredge the nozzle hole 132. First, the control system drives the printing nozzle 13 to reset through the slide rail 12, so that the printing nozzle 13 moves to the top of the cleaning box 21, and then the control system controls the nozzle cleaning component 2 to clean the area around the nozzle hole 132 to reduce the risk of the nozzle protection component 3 being blocked. The difficulty of unblocking the nozzle hole 132 is reduced; after the nozzle cleaning assembly 2 completes the preliminary cleaning work, under the control of the control system, the third electric cylinder 341 pushes the L-shaped plate 34 to bring the mounting plate 35 out of the mounting box 31, and pushes it to the bottom of the printing nozzle 13, so that the moisturizing ring 32 on the surface of the mounting plate 35 corresponds to the nozzle hole 132 of the printing nozzle 13, and then, the third electric cylinder 341 pushes the mounting plate 35 to rise, so that the moisturizing ring 32 is close to the nozzle hole 132, and is tightly attached to the surrounding of the nozzle hole 132, so that the nozzle 132 is surrounded by the moisturizing ring 32.

[0027] The liquid inlet component 4 is connected to an external cleaning liquid tank (not shown), and the liquid inlet pump 42 delivers a quantitative amount of cleaning liquid in the cleaning liquid tank to the moisturizing tank 33 through the liquid inlet pipe 41. The liquid level in the moisturizing tank 33 is lower than the vent 321 and submerges the laser emitter 38 and the laser receiver 39. Then the printing nozzle 13 sprays ink, and the unblocked nozzle holes 132 can spray a normal amount of ink, and the ink sprayed by the blocked nozzle holes 132 is reduced. Then the ultrasonic generator 37 is started to mix the ink and the cleaning liquid evenly, the laser emitter 38 emits laser, the laser receiver 39 receives the laser, and measures the intensity of the laser to obtain respective mixed laser intensity values, and sends the respective mixed laser intensity values ​​to the control system.

[0028] Before performing the above operation, the equipment should also be given a detection laser intensity value for judging the blockage of the nozzle 132. The detection laser intensity value is detected by the operator using an external detection instrument under the same conditions. Specifically, the same volume and model of cleaning liquid and the same model and volume of ink are placed in a container with the same shape and size as the moisturizing groove 33 for uniform mixing, and the mixing ratio is controlled to be the same as the above-mentioned mixing ratio of the normal amount of ink sprayed and the cleaning liquid. The laser intensity value is detected using the same model of laser emitter 38 and laser receiver 39. In this process, it should be ensured that the path length of the laser is the same as the laser path length in the mixed laser intensity value detection process. The laser emitter 38 emits laser, and the laser receiver 39 receives the laser and performs intensity detection to obtain the detection laser intensity value.

[0029] The above-mentioned detection principle is that after the laser emitter 38 emits the laser, when the laser passes through the mixed liquid composed of ink and cleaning fluid with the same path length, the cleaning fluid and ink will block the transmission of the laser, and the laser will have more scattering or absorption. Therefore, the laser intensity value received and measured by the laser receiver 39 is reduced. At the same time, the control system marks the laser intensity received by the laser receiver 39 as a mixed laser intensity value, and corresponds the mixed laser intensity value to the nozzle 132. The mixed laser intensity value corresponding to the nozzle 132 that can spray a normal amount of ink is the same as the detection laser intensity value, and the mixed laser intensity value corresponding to the nozzle 132 that cannot spray a normal amount of ink is greater than the detection laser intensity value.

[0030] During the above-mentioned process of detecting the laser intensity value and measuring the mixed laser intensity value, the volume of the normal ink ejected can be controlled to be 1-5% of the volume of the cleaning liquid, so that the ink has little or no effect on the total volume change after mixing.

[0031] Because the above operation is performed in each moisturizing groove 33, the mixed laser intensity value of the unblocked nozzle hole 132 should be smaller than the mixed laser intensity value of the blocked nozzle hole 132, and the mixed laser intensity value of the unblocked nozzle hole 132 is the same as the detection laser intensity value. The laser receiver 39 transmits the data to the control system. After the control system receives all the mixed laser intensity values, the nozzle hole 132 corresponding to the mixed laser intensity value smaller than the detection laser intensity value is determined to be blocked, so that the control system can determine the position of the blocked nozzle hole 132, and mark the mixed laser intensity value of the unblocked nozzle hole 132 as laser intensity value one, mark the mixed laser intensity value of the blocked nozzle hole 132 as laser intensity value two, and determine the nozzle hole 132 with laser intensity value two as a blocked nozzle hole 132. Then the control system cleans the nozzle hole 132 determined to be blocked.

[0032] After determining the position of the clogged nozzle hole 132, the control system controls the heating plate 30 to heat the cleaning liquid to a certain extent. After the heating is completed, the circulation pump 52 is started. The circulation pump 52 circulates the cleaning liquid through the circulation pipe 51. Because the liquid outlet of the circulation pipe 51 is facing the clogged nozzle hole 132, the liquid outlet of the circulation pipe 51 is under the pressure applied by the circulation pump 52. The cleaning liquid is sprayed toward the clogged nozzle hole 132 through the liquid outlet of the circulation pipe 51, so that the cleaning liquid enters the clogged nozzle hole 132 and contacts the ink particles in the nozzle hole 132. Then the ultrasonic generator 37 is started. The ultrasonic generator 37 is tightly attached to the surrounding of the clogged nozzle hole 132 and emits ultrasonic waves. The ink particles are broken by ultrasonic waves, which makes it easier for the warm cleaning liquid to dissolve the ink particles, thereby unblocking the nozzle hole 132.

[0033] Then the liquid outlet pump 62 draws the mixture of ink and cleaning liquid out of the moisturizing tank 33 through the liquid outlet pipe 61, and at the same time the liquid inlet component 4 sends the clean cleaning liquid into the moisturizing tank 33 for a period of time to clean the moisturizing tank 33. Then the control system controls the printing nozzle 13 to spray ink again, and then uses the ultrasonic generator 37 to mix the ink and cleaning liquid evenly. The laser transmitter 38 emits laser, the laser receiver 39 emits laser, and measures the intensity of the laser to obtain laser intensity value three. The system compares the laser intensity value three with the detected laser intensity value, and through repeated cleaning and detection, until the mixed laser intensity value N measured after cleaning is the same as the detected laser intensity value, it can be determined that the nozzle 132 is completely unblocked.

[0034] When the printing nozzle 13 needs to be moisturized, the control system controls the third electric cylinder 341 to push the L-shaped plate 34 to bring the mounting plate 35 out of the mounting box 31 and push it to the bottom of the printing nozzle 13, so that the moisturizing ring 32 on the surface of the mounting plate 35 corresponds to the nozzle 132 of the printing nozzle 13. Then, the third electric cylinder 341 pushes the mounting plate 35 upward, so that the moisturizing ring 32 is close to the nozzle 132 and is tightly attached to the nozzle 132, so that the nozzle 132 is surrounded by the moisturizing ring 32, so that a relatively well-sealed space is formed between the moisturizing groove 33 and the nozzle 132, so that the nozzle 132 can always remain moist.

[0035] like Figure 2 and Figure 3 As shown, as a preferred embodiment of the present invention, sliding plates 221 are provided on the left and right sides of the sliding box 22, and sliding grooves 211 that can slide with the sliding plates 221 are provided in the side walls on the left and right sides of the cleaning box 21. The sliding box 22 is provided with leak-proof side plates 222 on the top, and the sliding plate 221 is correspondingly provided with a first electric cylinder 27, the telescopic end of the first electric cylinder 27 is connected to the sliding plate 221, and the cylinder body of the first electric cylinder 27 is connected to the mounting box 31; a partition 23 is provided inside the sliding box 22, and the cleaning sponge 24 is installed on the upper surface of the partition 23, and the cleaning pipeline assembly 25 and the recovery pipeline assembly 26 are arranged below the partition 23. The cross-section of the cleaning sponge 24 is wavy, and the cleaning sponge 24 is provided with a protrusion 241 and a recessed portion 242.

[0036] The first electric cylinder 27 drives the sliding box 22 to reciprocate in the cleaning box 21, so that the raised portion 241 of the cleaning sponge 24 inside the sliding box 22 can clean and wipe the area around the nozzle hole 132 of the printing nozzle 13, and the cleaned ink is absorbed by the cleaning sponge 24. During the cleaning process, the cleaning pipeline assembly 25 transports the cleaning liquid in the storage box 251 to the raised portion 241 of the cleaning sponge 24 through the delivery pump 252 and the delivery pipeline 253, and lubricates the raised portion 241 of the cleaning sponge 24. The ink is wetted, thereby increasing the cleaning effect of the raised portion 241 of the cleaning sponge 24. The cleaned ink flows into and gathers in the recessed portion 242 of the cleaning sponge 24. The recovery pipe assembly 26 pumps the waste liquid composed of the mixture of ink and cleaning liquid in the recessed portion 242 into the recovery tank 261 for temporary storage through the pumping pump 262 and the recovery pipe 263, thereby cleaning the ink on the surface of the printing nozzle 13, keeping the area around the nozzle hole 132 of the printing nozzle 13 clean, and avoiding clogging of the nozzle hole 132.

[0037] like Figure 3 and Figure 4 As shown, as a preferred embodiment of the present invention, the cleaning pipeline assembly 25 includes a storage box 251, a delivery pump 252, and a delivery pipeline 253. The storage box 251 and the delivery pump 252 are arranged inside the sliding box 22. Delivery pipelines 253 are set at both ends of the delivery pump 252. The liquid inlet end of the delivery pump 252 is connected to the storage box 251 through the delivery pipeline 253, and the liquid outlet end of the delivery pump 252 is connected to the cleaning sponge 24 through the delivery pipeline 253. The delivery pipeline 253 at the liquid outlet end of the delivery pump 252 is provided with a plurality of liquid outlets, and the liquid outlets are arranged in the raised portion 241 of the cleaning sponge 24.

[0038] The cleaning pipeline assembly 25 uses the delivery pump 252 to pump the cleaning liquid in the storage box 251 through the delivery pipeline 253 to the raised portion 241 of the cleaning sponge 24, so as to achieve uniform distribution and wetting of the cleaning liquid, so as to enhance the cleaning effect of the cleaning sponge 24 on the ink around the nozzle hole 132 of the printing nozzle 13. The liquid outlet of the delivery pipeline 253 is specially arranged in the raised portion 241 of the cleaning sponge 24, so that the cleaning liquid can directly act on the key area in contact with the nozzle hole 132, that is, the raised portion 241, so as to more effectively dissolve and remove the ink, while maintaining the recessed portion 242 as a waste liquid collection area for subsequent recycling and treatment.

[0039] like Figure 3 and Figure 4As shown, as a preferred embodiment of the present invention, the recovery pipeline assembly 26 includes a recovery box 261, a pumping pump 262 and a recovery pipeline 263. The recovery box 261 and the pumping pump 262 are arranged inside the sliding box 22. Recovery pipelines 263 are set at both ends of the pumping pump 262. The liquid outlet end of the pumping pump 262 is connected to the recovery box 261 through the recovery pipeline 263, and the liquid inlet end of the pumping pump 262 is connected to the cleaning sponge 24 through the recovery pipeline 263. The recovery pipeline 263 at the liquid inlet end of the pumping pump 262 is provided with a plurality of liquid inlets, and the liquid inlets are arranged in the lower recess 242 of the cleaning sponge 24.

[0040] The working principle of the recovery pipeline assembly 26 is to work inside the sliding box 22 through the pumping pump 262, and use the several liquid inlets on the recovery pipeline 263 connected to its liquid inlet end to extract the accumulated ink and cleaning liquid mixed waste liquid from the lower recess 242 of the cleaning sponge 24, and then transport the waste liquid to the recovery box 261 for temporary storage through the liquid outlet end of the pumping pump 262 and the recovery pipeline 263, thereby realizing the effective recovery and management of the waste liquid generated during the cleaning process.

[0041] The wavy structural design of the cleaning sponge 24 provides a raised portion 241 and a recessed portion 242 on its surface. This structure can more effectively contact the area around the nozzle hole 132 of the printing nozzle 13 during the cleaning process. The raised portion 241 provides enhanced cleaning force to wipe and clean the ink around the nozzle hole 132, while the recessed portion 242 serves as a waste liquid collection area to collect the cleaned ink and cleaning liquid mixture, which is helpful for subsequent recycling and processing, while avoiding the waste liquid from overflowing, thereby improving the cleaning efficiency and effect.

[0042] like Figure 2 and Figure 5 As shown in FIG. 1 , as a preferred embodiment of the present invention, an L-shaped plate 34 is provided inside the mounting box 31, the mounting plate 35 is provided above the L-shaped plate 34, a second electric cylinder 36 is fixedly connected between the mounting plate 35 and the L-shaped plate 34, a third electric cylinder 341 is provided on one side of the L-shaped plate 34, the third electric cylinder 341 is provided outside the mounting box 31, the telescopic rod end of the third electric cylinder 341 passes through the side wall of the mounting box 31 and is connected to the L-shaped plate 34, and the cylinder body of the third electric cylinder 341 is connected to the mounting box 31. The mounting box 31 is connected; the mounting plates 35 are distributed in a rectangular array on the upper surface of the moisturizing ring 32, and the moisturizing rings 32 are respectively enclosed by the mounting plates 35 to form a number of moisturizing grooves 33. The moisturizing ring 32 is provided with a vent 321 near the top thereof, and the ultrasonic generator 37 is arranged at the top position of the inner ring of the moisturizing ring 32. The laser emitter 38 and the laser receiver 39 are arranged opposite to each other and staggered with the bottom center of the moisturizing groove 33. A heating plate 30 is installed at the bottom center of the moisturizing groove 33.

[0043] The nozzle protection assembly 3 precisely aligns the moisturizing ring 32 with the nozzle 132 of the printing nozzle 13 through the movable mounting plate 35 in the mounting box 31, and uses the liquid inlet component 4 to inject cleaning liquid into the moisturizing tank 33, and then starts the ultrasonic generator 37 to promote the mixing of ink and cleaning liquid, and detects the laser intensity through the laser emitter 38 and the laser receiver 39 to determine the blockage of the nozzle 132. For the blocked nozzle 132, the cleaning liquid is heated and the warm cleaning liquid is directly sprayed to the blocked nozzle 132 through the circulation pump 52 of the circulation component 5. At the same time, the ultrasonic generator 37 emits ultrasonic waves to break up the ink particles and promote dissolution and dredging. After the cleaning is completed, the liquid outlet component 6 draws out the waste liquid and re-injects the cleaning liquid to clean the moisturizing tank 33 until the nozzle 132 is completely unblocked as confirmed by laser detection.

[0044] like Figure 6 As shown, as a preferred embodiment of the present invention, the liquid inlet component 4, the circulation component 5 and the liquid outlet component 6 are arranged between the L-shaped plate 34 and the mounting plate 35, the liquid inlet component 4 includes a liquid inlet pipe 41 and a liquid inlet pump 42, the liquid inlet pump 42 is connected to the moisturizing groove 33 through the liquid inlet pipe 41, the circulation component 5 includes a circulation pipe 51 and a circulation pump 52, the liquid inlet end of the circulation pump 52 is connected to the bottom of the moisturizing groove 33 through the circulation pipe 51, the liquid outlet end of the circulation pump 52 is connected to the moisturizing groove 33 through the circulation pipe 51, the liquid outlet of the circulation pipe 51 at the liquid outlet end of the circulation pump 52 is arranged directly below the spray hole 132, the liquid outlet component 6 includes a liquid outlet pipe 61 and a liquid outlet pump 62, the liquid outlet pump 62 is connected to the moisturizing groove 33 through the liquid outlet pipe 61.

[0045] The liquid inlet component 4 consists of a liquid inlet pipe 41 and a liquid inlet pump 42, which is responsible for transporting the cleaning liquid from the external cleaning liquid tank to the moisturizing tank 33. When the control system starts the cleaning process, the liquid inlet pump 42 starts working, sucking the cleaning liquid from the cleaning liquid tank through the liquid inlet pipe 41 and pumping it to the moisturizing tank 33. The cleaning liquid gradually fills the moisturizing tank 33 until the liquid level reaches the set height but is lower than the vent 321, ensuring that the laser emitter 38 and the laser receiver 39 are submerged, providing conditions for subsequent laser detection.

[0046] The circulation component 5 consists of a circulation pipe 51 and a circulation pump 52. Its main function is to circulate the cleaning liquid during the cleaning process to enhance the cleaning effect of the blocked nozzle hole 132. When the control system determines the position of the blocked nozzle hole 132, the heating plate 30 first heats the cleaning liquid. Then, the circulation pump 52 is started, and the heated cleaning liquid is extracted from the bottom of the moisturizing tank 33 through the circulation pipe 51. After pressurizing, it is directly sprayed to the blocked nozzle hole 132 through the liquid outlet. The cleaning liquid is in full contact with the ink particles in the nozzle hole 132. At the same time, the ultrasonic generator 37 emits ultrasonic waves to break up the ink particles, thereby promoting the dissolution of the ink particles by the cleaning liquid and the unblocking of the nozzle hole 132.

[0047] The liquid outlet component 6 is composed of a liquid outlet pipe 61 and a liquid outlet pump 62, which is responsible for extracting the cleaned waste liquid from the moisturizing tank 33 and replenishing new cleaning liquid through the liquid inlet component 4 to realize the cleaning of the moisturizing tank 33 and the replacement of the cleaning liquid. After the cyclic cleaning process is completed, the liquid outlet pump 62 is started to extract the cleaning liquid mixture in the moisturizing tank 33 through the liquid outlet pipe 61. At the same time, the liquid inlet component 4 continues to work and transports the clean cleaning liquid to the moisturizing tank 33 through the liquid inlet pipe 41 and the liquid inlet pump 42 to clean the moisturizing tank 33 and update the cleaning liquid. This process continues for a period of time until the moisturizing tank 33 is thoroughly cleaned to prepare for subsequent inkjet and laser detection.

[0048] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A digital printing device with a nozzle protection and cleaning device, comprising a printing table (1), characterized in that: The surface of the printing table (1) is symmetrically provided with support boxes (11) along the width direction, and fixedly connected slide rails (12) are provided between the support boxes (11), and the slide rails (12) are provided with a slidingly matched printing nozzle (13), and the surface of the printing nozzle (13) is provided with a plurality of nozzle holes (132) distributed in a rectangular array, and the surface of the printing table (1) is provided with a nozzle cleaning assembly (2) at a position adjacent to the support box (11), and the nozzle cleaning assembly (2) is connected to a nozzle protection assembly (3), and the nozzle cleaning assembly (2) is provided with a cleaning box (21), and the cleaning box (21) is provided with a movably connected sliding box (22), and a cleaning sponge (24) is provided at the top of the sliding box (22), and the sliding box (22) is provided with a cleaning sponge (24). A cleaning pipe assembly (25) and a recovery pipe assembly (26) connected to the cleaning sponge (24) are provided inside the moving box (22); the nozzle protection assembly (3) is provided with a mounting box (31); the mounting box (31) is provided with a movable mounting plate (35); a surface of the mounting plate (35) is provided with a plurality of moisturizing rings (32) corresponding to the positions of the spray holes (132); an ultrasonic generator (37), a laser transmitter (38) and a laser receiver (39) are provided inside the moisturizing rings (32); the moisturizing rings (32) are respectively provided with a liquid inlet component (4), a circulation component (5) and a liquid outlet component (6) connected thereto; an L-shaped plate (34) is provided inside the mounting box (31); the mounting plate (35) is provided with a plurality of moisturizing rings (32) corresponding to the positions of the spray holes (132); an ultrasonic generator (37), a laser transmitter (38) and a laser receiver (39) are provided inside the moisturizing rings (32); and the liquid inlet component (4), the circulation component (5) and the liquid outlet component (6) connected thereto are respectively provided thereto; The plates (35) are distributed in a rectangular array on the upper surface of the moisturizing ring (32), and the moisturizing ring (32) is respectively enclosed with the mounting plate (35) to form a plurality of moisturizing grooves (33). The moisturizing ring (32) is provided with a vent hole (321) near the top thereof. The ultrasonic generator (37) is arranged at the top position of the inner ring of the moisturizing ring (32). The laser transmitter (38) and the laser receiver (39) are arranged relative to each other and staggered with the bottom center of the moisturizing groove (33). A heating plate (30) is installed at the bottom center of the moisturizing groove (33); the liquid inlet component (4), the circulation component (5) and the liquid outlet component (6) are arranged between the L-shaped plate (34) and the mounting plate (35). The liquid inlet component ( 4) includes a liquid inlet pipe (41) and a liquid inlet pump (42), the liquid inlet pump (42) is connected to the moisturizing tank (33) through the liquid inlet pipe (41), the circulation component (5) includes a circulation pipe (51) and a circulation pump (52), the liquid inlet end of the circulation pump (52) is connected to the bottom of the moisturizing tank (33) through the circulation pipe (51), the liquid outlet end of the circulation pump (52) is connected to the moisturizing tank (33) through the circulation pipe (51), the liquid outlet of the circulation pipe (51) at the liquid outlet end of the circulation pump (52) is arranged directly below the spray hole (132), the liquid outlet component (6) includes a liquid outlet pipe (61) and a liquid outlet pump (62), the liquid outlet pump (62) is connected to the moisturizing tank (33) through the liquid outlet pipe (61).

2. The digital printing device with a nozzle protection and cleaning device according to claim 1, characterized in that: The sliding box (22) is provided with sliding plates (221) on the left and right sides, and the side walls on the left and right sides of the cleaning box (21) are provided with sliding grooves (211) that can slide with the sliding plates (221). The sliding box (22) is provided with leak-proof side plates (222) on the top, and the sliding plates (221) are provided with first electric cylinders (27) correspondingly. The telescopic ends of the first electric cylinders (27) are connected to the sliding plates (221), and the cylinder body of the first electric cylinders (27) is connected to the mounting box (31).

3. The digital printing device with a nozzle protection and cleaning device according to claim 1, characterized in that: A partition (23) is provided inside the sliding box (22), the cleaning sponge (24) is installed on the upper surface of the partition (23), the cleaning pipeline assembly (25) and the recovery pipeline assembly (26) are arranged below the partition (23), the cross section of the cleaning sponge (24) is wavy, and the cleaning sponge (24) is provided with a raised portion (241) and a recessed portion (242).

4. The digital printing device with a nozzle protection and cleaning device according to claim 3, characterized in that: The cleaning pipeline assembly (25) comprises a storage box (251), a delivery pump (252), and a delivery pipeline (253). The storage box (251) and the delivery pump (252) are arranged inside the sliding box (22). Delivery pipelines (253) are arranged at both ends of the delivery pump (252). The liquid inlet end of the delivery pump (252) is connected to the storage box (251) through the delivery pipeline (253). The liquid outlet end of the delivery pump (252) is connected to the cleaning sponge (24) through the delivery pipeline (253). The delivery pipeline (253) at the liquid outlet end of the delivery pump (252) is provided with a plurality of liquid outlets, and the liquid outlets are arranged in the protrusion (241) of the cleaning sponge (24).

5. The digital printing device with a nozzle protection and cleaning device according to claim 3, characterized in that: The recovery pipeline assembly (26) includes a recovery box (261), a pumping pump (262) and a recovery pipeline (263). The recovery box (261) and the pumping pump (262) are arranged inside the sliding box (22). Recovery pipelines (263) are arranged at both ends of the pumping pump (262). The liquid outlet end of the pumping pump (262) is connected to the recovery box (261) through the recovery pipeline (263). The liquid inlet end of the pumping pump (262) is connected to the cleaning sponge (24) through the recovery pipeline (263). The recovery pipeline (263) at the liquid inlet end of the pumping pump (262) is provided with a plurality of liquid inlets, and the liquid inlets are arranged in the lower recess (242) of the cleaning sponge (24).

6. The digital printing device with a nozzle protection and cleaning device according to claim 1, characterized in that: The mounting plate (35) is arranged above the L-shaped plate (34); a second electric cylinder (36) is fixedly connected between the mounting plate (35) and the L-shaped plate (34); a third electric cylinder (341) is provided on one side of the L-shaped plate (34); the third electric cylinder (341) is arranged outside the mounting box (31); an end of a telescopic rod of the third electric cylinder (341) passes through a side wall of the mounting box (31) and is connected to the L-shaped plate (34); and a cylinder body of the third electric cylinder (341) is connected to the mounting box (31).

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