Cleaning and maintaining mechanism for high-speed ink-jet rotary press and using method of cleaning and maintaining mechanism

Abstract

The invention discloses a cleaning and maintaining mechanism for a high-speed ink-jet rotary press and a using method thereof, and belongs to the technical field of ink-jet printing equipment. The cleaning and maintaining mechanism comprises a U-shaped frame body, a cross beam is arranged at the top of the U-shaped frame body, a movable printing frame is slidably connected to the cross beam, and a plurality of nozzles are arranged on the movable printing frame. A first side support and a second side support are arranged on the two sides of the frame body respectively, a vertical moving assembly is installed on the first side support, and a cleaning assembly is arranged on the vertical moving assembly. The cleaning assembly comprises a cleaning pool, a plurality of oscillating cylinders are arranged on the outer side of the cleaning pool, output shafts of the cylinders are connected with scraper rotating shafts, and a plurality of scrapers with inclined sharp corner structures are installed on the rotating shafts at intervals. A cleaning pipe parallel to the scraper rotating shaft is arranged in the cleaning pool, and a plurality of cleaning holes facing the scraper are formed in the cleaning pipe. Cross contamination is avoided through the independent scraper design, the scraper is automatically cleaned through the cleaning pipe, finally, sealing and moisturizing of the spray head are achieved through lifting of the cleaning pool, and the advantages of being high in automation degree, thorough in cleaning, safe and reliable in operation and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing equipment, and in particular to a cleaning and maintenance mechanism for a high-speed inkjet rotary printing machine and a use method thereof. Background Art

[0002] As a non-contact, highly efficient imaging method, inkjet printing technology has been widely used in a variety of fields, including packaging, publishing, and label printing. High-speed inkjet rotary presses, due to their high continuous printing capacity and high production efficiency, have gradually become mainstream equipment in the high-volume printing market. However, during the inkjet printing process, nozzles are prone to clogging due to ink residue, drying, or external dust adhesion, seriously affecting print quality and equipment stability. Therefore, regular cleaning and maintenance of the printheads are critical to ensuring the long-term stable operation of the printing press.

[0003] Currently, common nozzle cleaning methods on the market are mainly divided into two categories: automatic cleaning and manual cleaning. Automatic cleaning systems often use a scraper to scrape the surface of the nozzle to remove excess ink and impurities. However, existing scrapers often have the following defects: First, a design typically uses one scraper for multiple nozzles. During the scraping process, the scraper can easily carry residual ink or dirt from the previous nozzle to the subsequent nozzle, causing cross-contamination. Second, the scraping action is long and slow, resulting in prolonged cleaning time. After cleaning, the nozzle remains exposed to the air for a long time, making it very easy for the ink to evaporate and dry out, and even secondary contamination from environmental particles, exacerbating the risk of clogging.

[0004] On the other hand, the cleaning of the scraper itself still requires manual cleaning after disassembly of the cleaning part. The operator needs to hold a non-woven cloth or wiping material to clean the scraper. This is not only inefficient, but also involves high operational risks, such as contact with chemicals, mechanical pinching, or accidental contact with high-voltage components. At the same time, it requires high skills and sense of responsibility of the operator, and it is difficult to maintain uniform cleaning quality.

[0005] Furthermore, existing cleaning devices lack fine-tuning capabilities in terms of squeegee pressure control and wiping path planning. This can lead to incomplete cleaning or scratches on the printhead surface due to poor contact between the scraper and the printhead, shortening the lifespan of the printhead. Therefore, there is an urgent need for a highly efficient, automated, cross-contamination-free, and safe printhead cleaning and moisturizing device to improve the reliability and service life of high-speed inkjet equipment. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present invention provides a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press and a method for using the same. The technical solutions of the present invention are as follows: In a first aspect of the present invention, a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press is provided, comprising a U-shaped frame, a crossbeam provided at the top of the frame, a movable printing frame slidably connected to the crossbeam, the movable printing frame being provided with a plurality of printheads, a first side bracket and a second side bracket respectively provided on either side of the mounting frame, the first side bracket being provided with a vertical movable assembly, and a cleaning assembly being installed on the vertical movable mechanism; The cleaning assembly includes a cleaning pool, a plurality of swing cylinders are provided at set intervals on the outside of the cleaning pool, the output shafts of the plurality of swing cylinders extend into the cleaning pool and are respectively connected to scraper shafts, one end of the scraper shaft away from the swing cylinder is rotatably connected to the cleaning pool, a plurality of scrapers are provided on the scraper shaft at set intervals, and the ends of the plurality of scrapers away from the scraper shaft are provided with oblique pointed angle structures; A plurality of cleaning pipes are provided in the cleaning pool in parallel with the scraper shafts. The cleaning pipes are respectively arranged on one side of the plurality of scraper shafts. The cleaning pipes are provided with a plurality of cleaning holes facing the scrapers. In some embodiments of the present invention, a control module is further included, wherein the control module is used to control the vertical moving component to drive the cleaning component to move vertically and to control the mobile printing frame to move horizontally along the beam. In some embodiments of the present invention, a first drive motor is provided on the crossbeam, an output shaft of the first drive motor is connected to a first lead screw, a first connecting block is provided on the top of the mobile printing frame, and the connecting block is connected to the first lead screw; A first guide rail is provided on the crossbeam, and a first sliding block is provided on the top of the movable printing frame. The first sliding block is slidably mounted on the first guide rail. In some embodiments of the present invention, the first side bracket is provided with a zero point limit proximity switch and a horizontal washing position limit proximity switch, and the second side bracket is provided with a working position limit proximity switch; The end of the mobile printing frame close to the first side bracket is provided with a first contact and a second contact, and the end of the mobile printing frame close to the second side bracket is provided with a third contact; The first contact is arranged corresponding to the zero point limit proximity switch, the second contact is arranged corresponding to the horizontal cleaning position limit proximity switch, and the third contact is arranged corresponding to the working position limit proximity switch. In some embodiments of the present invention, the vertical moving component includes a bracket, a mounting plate and a second drive motor, the mounting plate is arranged on the side of the first side bracket close to the mobile printing frame, the second drive motor is arranged on the mounting plate, the output end of the second drive motor is connected to the second lead screw, the second lead screw is connected to a second connecting block, the second connecting block is connected to the bracket, one end of the bracket is provided with a second slider, the mounting plate is provided with a second guide rail, the second slider is slidably installed on the second guide rail; a cleaning pool is installed on the top of the bracket. In some embodiments of the present invention, a first limit block is provided on the upper portion of the mounting plate, and a second limit block is provided on the lower portion of the mounting plate; a photoelectric displacement sensor is provided on the mounting plate, and the photoelectric displacement sensor is used to detect position information of the bracket. In some embodiments of the present invention, the axial direction of the scraper shaft is perpendicular to the direction in which the movable printing frame moves along the beam, and the multiple scraper shafts are parallel to each other. In some embodiments of the present invention, the mobile printing frame includes a first side plate and a second side plate, a nozzle base plate is provided between the bottoms of the first side plate and the second side plate, a reinforcing beam is provided between the first side plate and the second side plate, and the reinforcing beam is provided on the upper portion of the nozzle base plate; The nozzle bottom plate is provided with a plurality of strip-shaped through holes, and the nozzles are correspondingly arranged on the plurality of strip-shaped through holes. The strip-shaped through holes are arranged correspondingly to the upper and lower positions of the scraper. In some embodiments of the present invention, the scraper is made of a flexible material; and a drain valve is provided at the bottom of the cleaning tank. In a second aspect of the present invention, a method for using a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press is provided, comprising: The movable printing frame is located at the working position of the second side bracket for printing, and after printing is completed, it moves along the crossbeam to the first side bracket to the zero position, and the vertical moving component is located at the bottom initial position; The vertical moving assembly drives the cleaning assembly to move upward to the scraping and cleaning position at the bottom of the mobile printing frame, and multiple swing cylinders drive the scraper shaft to rotate a certain angle, so that the multiple scrapers rotate from a horizontal state to an upright state, and the mobile printing frame moves along the crossbeam toward the second side bracket for a set distance, so that the oblique angle structure at the top of the scraper contacts the printhead respectively, scraping off the residual ink on the printhead; After the ink at the nozzle is scraped off, multiple swing cylinders drive the scraper shaft to rotate a certain angle, causing several scrapers to rotate from an upright state to a horizontal state, and water in several cleaning pipes is discharged from the cleaning holes to clean the scrapers; After the scraper is cleaned, the vertical moving assembly drives the cleaning assembly to move up a certain distance to the moisturizing position below the movable printing frame, so that the cleaning pool abuts against the bottom of the movable printing frame to form a sealed state, and the cleaning pool forms a moisturizing environment for the print head; After the nozzle is moisturized, the vertical moving component drives the cleaning component to move down to the bottom initial position, and the mobile printing frame moves along the beam to the first side bracket to the zero position. When printing, it moves along the beam to the second side bracket to the working position for printing.

[0007] One or more technical solutions of the present invention have the following beneficial effects: The present invention provides a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press and a method for using the same, which solves the problems of existing nozzle cleaning devices such as secondary contamination, low ink scraping efficiency, high manual cleaning risks, and incomplete cleaning processes. Specifically: The coordinated layout of the U-shaped frame, crossbeams and mobile print frame provides a stable and reliable mechanical platform for nozzle cleaning and moisturizing. The arrangement of each nozzle corresponding to an independent scraper fundamentally eliminates the cross-contamination caused by the traditional sharing of a scraper. The scraper is driven by a swing cylinder to precisely flip the scraper shaft at an angle and can switch between horizontal and upright states. Combined with the lateral movement of the mobile print frame, efficient and thorough ink scraping operations are achieved, which greatly shortens the time the nozzle is exposed to the air and effectively prevents ink drying and dust contamination.

[0008] The cleaning pipes and cleaning holes installed in the cleaning pool can automatically spray cleaning liquid to clean the scraper, completely replacing the traditional manual handheld non-woven cloth wiping method. It not only improves the cleaning efficiency, but also significantly reduces the labor intensity and safety hazards of the operator.

[0009] In addition, by driving the precise lifting and lowering of the cleaning pool through the vertical moving component, and coordinating with the position detection contacts on the mobile print frame and the proximity switch on the side bracket, the system can accurately position the scraper to the scraping and cleaning position, and lift the cleaning pool to a moisturizing position that is sealed with the bottom of the mobile print frame, thereby providing a closed moisturizing environment for the print head immediately after scraping the ink to prevent nozzle clogging.

[0010] Under the coordination of the control module, the overall mechanism realizes a fully automatic and integrated cleaning and moisturizing process, with outstanding advantages such as safe operation, thorough cleaning, high efficiency, and no need for human intervention, which significantly improves the reliability and service life of high-speed inkjet rotary printing presses. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A three-dimensional structural diagram of a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press provided in Example 1 of the present invention; Figure 2This is a front view of a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press provided in Example 1 of the present invention; Figure 3 This is a structural diagram of the external frame of the mobile printing stand provided in Example 1 of the present invention; Figure 4 This is a schematic structural diagram of a cleaning assembly provided in Example 1 of the present invention; Figure 5 Schematic diagram of the structure of the vertical moving assembly provided in Example 1 of the present invention Figure 1 ; Figure 6 Schematic diagram of the structure of the vertical moving assembly provided in Example 1 of the present invention Figure 2 ; Figure 7 A schematic diagram of the internal structure of a cleaning pool provided in Example 1 of the present invention; Figure 8 This is a diagram of the reinforcement beam installation structure provided in Example 1 of the present invention.

[0012] In the figure: 1. crossbeam; 2. first side bracket; 3. second side bracket; 4. mobile printing frame; 5. nozzle base plate; 6. strip through hole; 7. bracket; 8. swing cylinder; 9. cleaning tank; 10. water inlet; 11. scraper; 12. first drive motor; 13. first contact; 14. second contact; 15. third contact; 16. horizontal cleaning position limit proximity switch; 17. zero point limit proximity switch; 18. working position limit proximity switch; 19. first lead screw; 20. mounting plate; 21. first limit block; 22. second slider; 23. second connecting block; 24. second lead screw; 25. coupling; 26. second limit block; 27. second drive motor; 28. second guide rail; 29. ​​photoelectric displacement sensor; 30. scraper shaft; 31. cleaning pipe; 32. drain valve; 33. cleaning hole; 34. adjustment component. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Example 1 In a typical embodiment of the present invention, a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press is provided, comprising a U-shaped frame, a crossbeam 1 being provided at the top of the frame, a movable printing frame 4 being slidably connected to the crossbeam 1, and a plurality of printheads being provided on the movable printing frame 4, a first side bracket 2 and a second side bracket 3 being provided on either side of the mounting frame, a vertical movable assembly being provided on the first side bracket 2, and a cleaning assembly being installed on the vertical movable mechanism; The cleaning assembly includes a cleaning pool 9, a plurality of swing cylinders 8 are provided at set intervals on the outside of the cleaning pool 9, the output shafts of the plurality of swing cylinders 8 extend into the cleaning pool 9 and are respectively connected to scraper shafts 30, the ends of the scraper shafts 30 away from the swing cylinders 8 are rotatably connected to the cleaning pool 9, a plurality of scrapers 11 are provided on the scraper shaft 30 at set intervals, and the ends of the plurality of scrapers 11 away from the scraper shaft 30 are provided with oblique pointed angle structures; A plurality of cleaning pipes 31 are provided in the cleaning pool 9 in parallel with the scraper shafts 30 . The cleaning pipes 31 are respectively provided on one side of the plurality of scraper shafts 30 . The cleaning pipes 31 are provided with a plurality of cleaning holes 33 facing the scrapers 11 . In this embodiment, a plurality of water inlets 10 are provided at the end of the cleaning pool 9 , and the water inlet 10 is connected to one end of the cleaning pipe 31 to supply water to the cleaning pipe 31 .

[0015] Through the overall structural layout, integrated cleaning and moisturizing of multiple nozzles are achieved, which significantly improves the cleaning efficiency. The U-shaped frame provides stable support, and the sliding connection between the crossbeam 1 and the mobile printing frame 4 realizes precise horizontal positioning during nozzle cleaning. The coordinated design of the cleaning tank 9, the scraper shaft 30 and the swing cylinder 8 in the cleaning component realizes the automatic control of the ink scraping action and the angle adjustment of the scraper 11, effectively avoiding the cross-contamination problem caused by the traditional multiple nozzles sharing one scraper. The oblique sharp angle structure set at the end of the scraper 11 is conducive to thoroughly scraping off ink residues and reducing nozzle clogging. The cleaning pipe 31 is embedded in the cleaning tank 9 and is provided with a cleaning hole 33, which can realize automatic cleaning of the scraper 11, greatly reducing the need for manual intervention and operation risks, and improving the automation level and reliability of the equipment.

[0016] In some embodiments of the present invention, a control module is further included, wherein the control module is used to control the vertical moving component to drive the cleaning component to move vertically and to control the mobile printing frame 4 to move horizontally along the beam 1. By adding a control module to control the vertical movement assembly and the lateral movement of the mobile printing carriage 4, the entire cleaning and moisturizing process is automated, improving operational precision and consistency. The control module coordinates the vertical and lateral movement sequences to ensure that the scraping, cleaning, and moisturizing processes are executed according to the preset process, reducing human error and improving the intelligence of the equipment and production efficiency.

[0017] In some embodiments of the present invention, a first drive motor 12 is provided on the crossbeam 1, the output shaft of the first drive motor 12 is connected to a first lead screw 19, and a first connecting block is provided on the top of the mobile printing frame 4, and the connecting block is connected to the first lead screw 19; A first guide rail is provided on the crossbeam 1 , and a first slider is provided on the top of the movable printing frame 4 . The first slider is slidably mounted on the first guide rail. The motor drive and the lead screw transmission realize high-precision and smooth lateral movement of the mobile printing frame 4. The guide rail and the slider structure enhance the movement stability, avoid jitter and deviation, ensure the accurate alignment of the scraper 11 and the nozzle during the scraping process, and improve the consistency of the scraping effect and the service life of the equipment.

[0018] In some embodiments of the present invention, the first side bracket 2 is provided with a zero point limit proximity switch 17 and a horizontal washing position limit proximity switch 16, and the second side bracket 3 is provided with a working position limit proximity switch 18; The end of the mobile printing frame 4 close to the first side bracket 2 is provided with a first contact 13 and a second contact 14, and the end of the mobile printing frame 4 close to the second side bracket 3 is provided with a third contact 15; The first contact 13 is corresponding to the zero point limit proximity switch 17 , the second contact 14 is corresponding to the horizontal washing position limit proximity switch 16 , and the third contact 15 is corresponding to the working position limit proximity switch 18 .

[0019] This setting enables high-precision detection and closed-loop control of the position of the mobile printing frame 4, ensuring the position accuracy of the printing, ink scraping and moisturizing stages. The cooperation of each proximity switch and contactor can realize automatic addressing and process switching, improve the system response speed and reliability, and avoid incomplete cleaning or equipment interference due to position error.

[0020] In another embodiment of the present invention, a working position over-limit protection switch may be provided at the working position, a zero point proximity switch and a zero point over-limit protection switch may be provided at the zero point position, and contacts a, b and c may be provided on the mobile printing rack, wherein contact a is provided in conjunction with the working position over-limit protection switch, contact b is provided in conjunction with the zero point proximity switch, and contact c is provided in conjunction with the zero point over-limit protection switch. The mobile printing rack 4 is moved by the printing control system. The above-mentioned settings realize the movement of the mobile printing rack 4 and the over-limit protection at the zero point position and the working position. Specifically: When the mobile printing rack 4 moves to the zero point proximity switch, the contact b senses and identifies the zero point proximity switch, and it is determined to be at the zero point position; when the mobile printing rack 4 moves to the working position, in order to prevent the mobile printing rack 4 from moving beyond the working position and colliding with the installation frame, a working position over-limit protection switch is set. When the contact a on the mobile printing rack 4 senses and identifies the working position over-limit protection switch, the mobile printing rack 4 stops moving, achieving precise positioning while forming over-limit protection; when the mobile printing rack 4 moves to the zero point, in order to prevent the mobile printing rack from moving beyond the zero point position and colliding with the installation frame, the contact c senses and identifies the zero point over-limit protection switch, and the mobile printing rack 4 stops moving, achieving precise positioning and over-limit protection of the zero point position.

[0021] In some embodiments of the present invention, the vertical movement assembly includes a carriage 7, a mounting plate 20, and a second drive motor 27. The mounting plate 20 is disposed on a side of the first side bracket 2 near the movable print carriage 4. The second drive motor 27 is mounted on the mounting plate 20. The output end of the second drive motor 27 is connected to a second lead screw 24, which is connected to a second connecting block 23. The second connecting block 23 is connected to the carriage 7. One end of the carriage 7 is provided with a second slider 22. The mounting plate 20 is provided with a second guide rail 28, and the second slider 22 is slidably mounted on the second guide rail 28. The cleaning tank 9 is mounted on the top of the carriage 7. In this embodiment, the output end of the second drive motor 27 is connected to the second lead screw 24 via a coupling 25.

[0022] The motor and lead screw drive achieve precise vertical positioning of the cleaning assembly, ensuring optimal contact between the scraper 11 and the printhead during both scraping and moisturizing. The slider and guide rail structure ensure smooth lifting and lowering, avoiding shock and vibration, helping to protect the printhead and scraper 11 and extending component life.

[0023] In some embodiments of the present invention, a first limit block 21 is provided on the upper portion of the mounting plate 20, and a second limit block 26 is provided on the lower portion of the mounting plate 20; a photoelectric displacement sensor 29 is provided on the mounting plate 20, and the photoelectric displacement sensor 29 is used to detect the position information of the bracket 7, and the position information includes but is not limited to initial position information and vertical cleaning position information.

[0024] The combination of the hard limits of the first and second limit blocks 21 and 26 and detection by the photoelectric displacement sensor 29 provides multiple protections and precise feedback on the position of the carriage 7. The first and second limit blocks 21 and 26 prevent overtravel damage, while the photoelectric displacement sensor 29 monitors the position of the carriage 7 in real time, ensuring that the cleaning assembly accurately switches between the initial position, the ink scraping position, and the moisturizing position, enhancing system safety and control accuracy.

[0025] In some embodiments of the present invention, the axial direction of the scraper shaft 30 is perpendicular to the direction in which the movable printing frame 4 moves along the beam 1 , and the multiple scraper shafts 30 are parallel to each other. This arrangement ensures that each scraper 11 maintains a uniform and orthogonal contact relationship with the nozzle during the scraping process, avoiding uneven wear or missed scraping. The parallel arrangement of the scraper shaft 30 ensures that multiple nozzles are scraped synchronously, improving the cleaning consistency and efficiency, and is particularly suitable for the cleaning needs of multi-nozzle high-speed printing equipment.

[0026] In some embodiments of the present invention, the mobile printing frame 4 includes a first side plate and a second side plate, a nozzle base plate 5 is provided between the bottoms of the first side plate and the second side plate, and a reinforcing beam is provided between the first side plate and the second side plate, and the reinforcing beam is provided on the upper portion of the nozzle base plate 5; The nozzle bottom plate 5 is provided with a plurality of strip-shaped through holes 6 , on which nozzles are correspondingly arranged, and the strip-shaped through holes 6 are arranged at upper and lower positions corresponding to the scraper 11 .

[0027] The reinforced beams enhance the overall rigidity of the printhead, preventing deformation due to movement or external forces and ensuring stable printhead positioning. The strip-shaped through-holes 6 align with the scraper 11, providing a channel for scraping ink while ensuring ease of installation and maintenance, balancing structural strength with functional requirements.

[0028] In some embodiments of the present invention, the scraper 11 is made of a flexible material; and a drain valve 32 is provided at the bottom of the cleaning tank 9 . The flexible scraper 11 can reduce wear and scratches on the nozzle surface, protect the precision nozzle structure, and extend its service life. The drain valve 32 facilitates the regular discharge of cleaning waste liquid, keeps the interior of the cleaning tank 9 clean, avoids secondary contamination or bacterial growth caused by sewage accumulation, and improves maintenance convenience and hygiene.

[0029] In this embodiment, the swing angle of the swing cylinder 8 is set to 0-90 degrees, the horizontal state is the initial position, and it reaches the scraping position in the upright state after rotating 90 degrees, and an adjustment component 34 is respectively provided at the end of each of the multiple swing cylinders 8. By controlling the adjustment component 34, the initial adjustment and positioning of the multiple swing cylinders 8 with respect to the scraper shaft 30 can be achieved, so that the multiple scrapers 11 are effectively in contact with the nozzle in the upright state.

[0030] In a second aspect of the present invention, a method for using a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press is provided, comprising: The mobile printing frame 4 is located at the working position of the second side bracket 3 for printing. After printing is completed, it moves along the crossbeam 1 to the first side bracket 2 to the zero point position. The first contact 13 cooperates with the zero point limit proximity switch 17 to realize the zero point positioning of the mobile printing frame 4. The vertical moving component is located at the bottom initial position; The vertical moving assembly drives the cleaning assembly to move upward to the scraping and cleaning position below the mobile printing frame 4. The multiple swing cylinders 8 drive the scraper shaft 30 to rotate a certain angle, so that the multiple scrapers 11 rotate from a horizontal state to an upright state. The mobile printing frame 4 moves a set distance along the crossbeam 1 toward the second side bracket 3. The second contact 14 cooperates with the horizontal cleaning position limit proximity switch 16 to realize the positioning of the mobile printing frame 4 at the scraping and cleaning position. During the movement, the oblique pointed structure at the top of the scraper 11 contacts the printhead respectively to scrape off the residual ink on the printhead. After the ink at the nozzle is scraped off, the multiple swing cylinders 8 drive the scraper shaft 30 to rotate a certain angle, so that the multiple scrapers 11 rotate from the upright state to the horizontal state, and the water in the multiple cleaning pipes 31 is discharged from the cleaning holes 33 to clean the scrapers 11; After the scraper 11 finishes cleaning, the vertical moving assembly drives the cleaning assembly to move up a certain distance to the moisturizing maintenance position below the movable printing frame 4, so that the cleaning pool 9 abuts against the bottom of the movable printing frame 4 to form a sealed state. The cleaning pool 9 forms a moisturizing maintenance environment for the print head. After the nozzle moisturizing maintenance is completed, the vertical moving component drives the cleaning component to move down and back to the bottom initial position, and the mobile printing frame 4 moves along the beam 1 to the first side bracket 2 to the zero position. When printing, it moves along the beam 1 to the second side bracket 3 to the working position for printing. The third contact 15 cooperates with the working position limit proximity switch 18 to realize the working position positioning of the mobile printing frame 4.

[0031] The present invention provides a complete, automated and highly efficient nozzle cleaning and moisturizing maintenance process, which significantly reduces manual operation links, reduces labor intensity and operation risks, and sequentially performs ink scraping, cleaning and moisturizing maintenance actions to thoroughly remove ink residues and prevent the nozzles from being exposed to the air after cleaning, thereby achieving a cleaning effect with almost zero clogging, which is particularly suitable for the continuous production needs of high-speed rotary printing presses.

[0032] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press, characterized in that: The invention comprises a frame body with a U-shaped structure, a crossbeam is provided on the top of the frame body, a movable printing frame is slidably connected to the crossbeam, and the movable printing frame is provided with a plurality of nozzles, a first side bracket and a second side bracket are respectively provided on both sides of the mounting frame body, a vertical movable assembly is provided on the first side bracket, and a cleaning assembly is installed on the vertical movable mechanism; The cleaning assembly includes a cleaning pool, a plurality of swing cylinders are provided at set intervals on the outside of the cleaning pool, the output shafts of the plurality of swing cylinders extend into the cleaning pool and are respectively connected to scraper shafts, one end of the scraper shaft away from the swing cylinder is rotatably connected to the cleaning pool, a plurality of scrapers are provided on the scraper shaft at set intervals, and the ends of the plurality of scrapers away from the scraper shaft are provided with oblique pointed angle structures; A plurality of cleaning pipes are provided in the cleaning pool in parallel with the scraper shafts. The cleaning pipes are respectively arranged on one side of the plurality of scraper shafts. The cleaning pipes are provided with a plurality of cleaning holes facing the scrapers.

2. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, characterized in that: It also includes a control module, which is used to control the vertical moving component to drive the cleaning component to move vertically and to control the mobile printing frame to move horizontally along the crossbeam.

3. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, characterized in that: A first drive motor is provided on the crossbeam, an output shaft of the first drive motor is connected to a first lead screw, a first connecting block is provided on the top of the mobile printing frame, and the connecting block is connected to the first lead screw; A first guide rail is provided on the crossbeam, and a first sliding block is provided on the top of the movable printing frame. The first sliding block is slidably mounted on the first guide rail.

4. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, characterized in that: The first side bracket is provided with a zero point limit proximity switch and a horizontal cleaning position limit proximity switch, and the second side bracket is provided with a working position limit proximity switch; The end of the mobile printing frame close to the first side bracket is provided with a first contact and a second contact, and the end of the mobile printing frame close to the second side bracket is provided with a third contact; The first contact is arranged corresponding to the zero point limit proximity switch, the second contact is arranged corresponding to the horizontal cleaning position limit proximity switch, and the third contact is arranged corresponding to the working position limit proximity switch.

5. The cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, wherein: The vertical moving assembly includes a bracket, a mounting plate and a second drive motor. The mounting plate is arranged on a side of the first side bracket close to the mobile printing frame. The second drive motor is arranged on the mounting plate. The output end of the second drive motor is connected to the second lead screw. The second lead screw is connected to a second connecting block. The second connecting block is connected to the bracket. A second slider is provided at one end of the bracket. A second guide rail is provided on the mounting plate. The second slider is slidably installed on the second guide rail. A cleaning pool is installed on the top of the bracket.

6. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 5, characterized in that: A first limit block is provided on the upper portion of the mounting plate, and a second limit block is provided on the lower portion of the mounting plate; a photoelectric displacement sensor is provided on the mounting plate, and the photoelectric displacement sensor is used to detect position information of the bracket.

7. A cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, characterized in that: The axial direction of the scraper shaft is perpendicular to the direction in which the movable printing frame moves along the crossbeam, and the multiple scraper shafts are parallel to each other.

8. The cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, wherein: The mobile printing frame includes a first side plate and a second side plate, a nozzle base plate is provided between the bottoms of the first side plate and the second side plate, a reinforcing beam is provided between the first side plate and the second side plate, and the reinforcing beam is provided on the upper part of the nozzle base plate; The nozzle bottom plate is provided with a plurality of strip-shaped through holes, and the nozzles are correspondingly arranged on the plurality of strip-shaped through holes. The strip-shaped through holes are arranged correspondingly to the upper and lower positions of the scraper.

9. The cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to claim 1, wherein: The scraper is made of flexible material; and a drain valve is provided at the bottom of the cleaning pool.

10. A method for using a cleaning and maintenance mechanism for a high-speed inkjet rotary printing press according to any one of claims 1 to 9, characterized in that: include: The movable printing frame is located at the working position of the second side bracket for printing, and after printing is completed, it moves along the crossbeam to the first side bracket to the zero position, and the vertical moving component is located at the bottom initial position; The vertical moving assembly drives the cleaning assembly to move upward to the scraping and cleaning position at the bottom of the mobile printing frame, and multiple swing cylinders drive the scraper shaft to rotate a certain angle, so that the multiple scrapers rotate from a horizontal state to an upright state, and the mobile printing frame moves along the crossbeam toward the second side bracket for a set distance, so that the oblique angle structure at the top of the scraper contacts the printhead respectively, scraping off the residual ink on the printhead; After the ink at the nozzle is scraped off, multiple swing cylinders drive the scraper shaft to rotate a certain angle, causing several scrapers to rotate from an upright state to a horizontal state, and water in several cleaning pipes is discharged from the cleaning holes to clean the scrapers; After the scraper is cleaned, the vertical moving assembly drives the cleaning assembly to move up a certain distance to the moisturizing position below the movable printing frame, so that the cleaning pool abuts against the bottom of the movable printing frame to form a sealed state, and the cleaning pool forms a moisturizing environment for the print head; After the nozzle is moisturized, the vertical moving component drives the cleaning component to move down to the bottom initial position, and the mobile printing frame moves along the beam to the first side bracket to the zero position. When printing, it moves along the beam to the second side bracket to the working position for printing.

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