Ink scraping device for printing roller of printing machine

Abstract

The utility model belongs to the technical field of printing machines, and particularly relates to a printing machine printing roller ink scraper which comprises an installation frame, rotating shafts are installed on the two sides of the installation frame in a penetrating mode, ink scraping plates are installed on the outer sides of the rotating shafts, a clamping groove is formed in a circular block, a positioning rod is fixedly connected to one side of the installation frame, and a movable block is installed on the outer side of the positioning rod in a sliding mode. A compression spring is fixedly connected between the movable block and the limiting block, a circular ring is installed on one side of the movable block, and a clamping block is installed on the inner wall of the circular ring. When the ink scraping plate is adjusted to a proper angle, the movable block is loosened, and the movable block and the circular ring move in the direction away from the limiting block under the counter-acting force of the compression spring, so that the clamping block is separated from the clamping groove, the handle drives the rotating shaft to rotate, and then the angle of the ink scraping plate is changed. And the clamping blocks are clamped in the clamping grooves again, so that the angle of the ink scraping plate is adjusted, the ink scraping plate can be better attached to the printing roller, and the ink scraping effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, specifically a doctor blade for printing press rollers. Background Technology

[0002] A printing press is a machine for printing text and images. In the process of printing decorative materials, a printing press uses printing rollers to print on the substrate. During the printing process, ink will remain on the printing rollers, which will affect subsequent printing work. Therefore, a doctor blade is needed to remove the ink.

[0003] A Chinese patent with authorization announcement number CN217574503U discloses a printing roller doctor for label printing, including a mounting base with a collection groove on the top and a flow guiding slope inside the collection groove. The flow guiding slope and the mounting base are respectively provided with a first flow guide and a second flow guide. A filter mechanism is installed inside the mounting cavity to filter impurities in the ink. A discharge pipe is inserted into one side of the mounting base. This invention solves the problem that existing printing roller doctors often fail to properly collect the scraped ink and remove impurities, leading to ink flowing freely into the ground and creating wastewater, and making ink recycling difficult. It achieves the effect of centralized collection of scraped ink and effective separation of impurities.

[0004] However, the above-mentioned doctor blade still has some problems. In practical applications, the angle of the doctor blade cannot be adjusted. When the ink distribution on the surface of the printing roller is uneven or the printing roller itself has certain wear and deformation, the doctor blade cannot fit well against the surface of the printing roller, resulting in incomplete ink scraping. Therefore, a doctor blade for printing rollers of printing presses is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background technology, this utility model proposes a doctor blade for printing rollers of printing machines.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A printing press printing roller scraper of this utility model includes a worktable, a mounting frame installed above the worktable, rotating shafts installed through both sides of the mounting frame, a scraper plate installed on the outer side of the rotating shafts, a handle installed at one end of the rotating shafts, and a circular block installed on the outer side of one end of the rotating shafts. The circular block has several equally spaced slots inside. A positioning rod is fixedly connected to one side of the mounting frame, a limit block is fixedly connected to one end of the positioning rod, and a movable block is slidably installed on the outer side of the positioning rod. A compression spring is fixed between the movable block and the limit block, and the compression spring is sleeved on the outer side of the positioning rod. A ring is installed on one side of the movable block, and the ring is sleeved on the outer side of the circular block. Several locking blocks that match the slots are equally spaced on the inner wall of the ring. By rotating the handle, the rotating shaft is rotated, thereby adjusting the angle of the scraper plate, so that the scraper plate can better fit the printing roller and improve the scraping effect.

[0007] Preferably, one end of the worktable has an upward-opening slide groove, and a sliding block is slidably installed inside the slide groove. The sliding block has a screw hole inside, and a threaded rod is rotatably installed inside the slide groove through the screw hole. One end of the threaded rod is equipped with a rotating handle. By rotating the rotating handle, the threaded rod is driven to rotate. Due to the action of the thread, the sliding block will move horizontally in the slide groove, thereby adjusting the position of the doctor blade in the horizontal direction, so that the doctor blade can adapt to printing plates of different thicknesses.

[0008] Preferably, a mounting plate is installed on the top side of the sliding block, and a rectangular groove is opened inside the mounting plate. A slider is slidably installed inside the rectangular groove. The mounting bracket is installed on one side of the slider. A locking screw is rotatably installed inside the slider. Seven threaded holes are equidistantly opened inside the mounting plate on one side of the rectangular groove. One end of the locking screw passes through the threaded holes. By moving the position of the slider in the rectangular groove, the position of the doctor blade in the vertical direction can be adjusted so that the doctor blade can make better contact with the printing roller.

[0009] Preferably, two support plates are symmetrically installed on the other end of the top side of the worktable, and a rotating shaft is installed between the two sides of the support plates. A printing roller body is installed on the outside of the rotating shaft to ensure that it can rotate smoothly for printing.

[0010] Preferably, a groove is provided inside the other end of the worktable, and two upward-opening slide rails are symmetrically provided on the bottom side of the groove. A slide plate is slidably installed inside the slide rails, and a collection frame is installed on the top side of the slide plate. The collection frame is located directly below the printing roller body, and a handle is installed on one side of the collection frame to collect the scraped ink and prevent the ink from flowing freely and causing pollution to the working environment.

[0011] Preferably, a filter plate is installed inside the top of the collection frame, and an ink discharge pipe is connected to the bottom edge of the collection frame. A valve is installed inside the ink discharge pipe. The filter plate can perform preliminary filtration of the ink to remove impurities. The setting of the ink discharge pipe and the valve allows the ink to be easily discharged from the collection frame for reuse or treatment, thereby improving resource utilization and environmental performance.

[0012] The advantages of this utility model are:

[0013] 1. This utility model causes the movable block to move towards the limiting block. The movable block compresses the spring, causing the locking block on the inner wall of the ring to disengage from the slot inside the circular block. At this time, turning the handle causes the rotating shaft to rotate, and the angle of the squeegee changes with the rotation of the rotating shaft. When the squeegee is adjusted to a suitable angle, the movable block is released. Under the reaction force of the compression spring, the movable block and the ring move away from the limiting block, and the locking block engages again inside the slot, thereby adjusting the angle of the squeegee so that the squeegee can better fit the printing roller and improve the squeegee effect.

[0014] 2. In this utility model, the rotating handle drives the threaded rod to rotate, causing the sliding block to move horizontally within the groove. This causes the mounting plate and the doctor blade to adjust their positions horizontally along with the horizontal movement of the sliding block, thus accommodating printing plates of different thicknesses. Secondly, the vertical position of the doctor blade is adjusted by regulating the position of the slider within the rectangular groove. First, loosen the locking screw to allow the slider to slide freely within the rectangular groove. Pushing the slider up and down within the rectangular groove causes the doctor blade to move up and down accordingly. Once the doctor blade is adjusted to a suitable vertical position, it will contact the printing roller. Then, rotate the locking screw so that one end of the locking screw passes through the threaded hole, thereby fixing the slider within the rectangular groove and ensuring good contact between the doctor blade and the printing roller body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the intermediate axis side view of the present invention;

[0017] Figure 2 A schematic diagram of the main structure of the doctor blade of a printing press;

[0018] Figure 3 This is a schematic diagram of the doctor blade position adjustment structure;

[0019] Figure 4 This is a schematic diagram of the doctor blade angle adjustment structure;

[0020] Figure 5 This is a schematic diagram of the ink collection structure.

[0021] In the diagram: 1. Workbench; 2. Mounting bracket; 3. Rotating shaft; 4. Doctor blade; 5. Handle; 6. Circular block; 7. Slot; 8. Positioning rod; 9. Limiting block; 10. Movable block; 11. Compression spring; 12. Ring; 13. Locking block; 14. Slide groove; 15. Threaded rod; 16. Rotating handle; 17. Sliding block; 18. Mounting plate; 19. Rectangular groove; 20. Slider; 21. Locking screw; 22. Support plate; 23. Rotating shaft; 24. Printing roller body; 25. Groove; 26. Slide rail; 27. Slide plate; 28. Collection frame; 29. ​​Filter plate; 30. Handle; 31. Ink discharge pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 As shown, a printing roller doctor for a printing press includes a worktable 1. A mounting frame 2 is installed above the worktable 1. Rotating shafts 3 are installed through both sides of the mounting frame 2. A doctor blade 4 is installed on the outer side of the rotating shaft 3. A handle 5 is installed at one end of the rotating shaft 3. A circular block 6 is installed on the outer side of one end of the rotating shaft 3. Several slots 7 are evenly spaced inside the circular block 6. A positioning rod 8 is fixedly connected to one side of the mounting frame 2. A limit block 9 is fixedly connected to one end of the positioning rod 8. A movable block 10 is slidably installed on the outer side of the positioning rod 8. A compression spring 11 is fixed between the movable block 10 and the limit block 9. The compression spring 11 is sleeved on the outer side of the positioning rod 8. A ring 12 is installed on one side of the movable block 10. The ring 12 is sleeved on the outer side of the circular block 6. Several locking blocks 13 that match the slots 7 are evenly spaced on the inner wall of the ring 12.

[0024] Two support plates 22 are symmetrically installed on the other end of the top side of the workbench 1. A rotating shaft 23 is installed between the two sides of the support plate 22. A printing roller body 24 is installed on the outside of the rotating shaft 23.

[0025] The other end of the worktable 1 has a groove 25 inside. Two upward-opening slide rails 26 are symmetrically opened on the bottom side of the groove 25. A slide plate 27 is slidably installed inside the slide rail 26. A collection frame 28 is installed on the top side of the slide plate 27. The collection frame 28 is located directly below the printing roller body 24. A handle 30 is installed on one side of the collection frame 28.

[0026] A filter plate 29 is installed inside the top of the collection frame 28, and an ink discharge pipe 31 is connected to the bottom edge of the collection frame 28. A valve is installed inside the ink discharge pipe 31. In actual application, the angle of the doctor blade 4 cannot be adjusted. When the ink distribution on the surface of the printing roller is uneven or the printing roller itself has certain wear or deformation, the doctor blade 4 cannot fit well against the surface of the printing roller, resulting in incomplete ink scraping. When it is necessary to adjust the angle of the doctor blade 4, first grasp the movable block 10 and move it towards the limiting block 9. During this process, the movable block 10 compresses the compression spring 11, and the ring 12 also moves accordingly. This causes the locking block 13 on the inner wall of the ring 12 to disengage from the slot 7 inside the circular block 6. At this time, the handle 5 is turned, and the handle 5 drives the rotating shaft 3 to rotate. The angle of the squeegee 4 will change with the rotation of the rotating shaft 3. When the squeegee 4 is adjusted to a suitable angle, the movable block 10 is released. Under the reaction force of the compression spring 11, the movable block 10 moves away from the limit block 9, and the ring 12 also moves. The locking block 13 is locked into the slot 7 again, thereby fixing the rotating shaft 3 and preventing it from rotating accidentally. This keeps the squeegee 4 at that angle, and then the angle of the squeegee 4 is adjusted so that the squeegee 4 can better fit the printing roller and improve the squeegee effect.

[0027] When the doctor blade 4 performs the doctoring operation on the printing roller body 24, the scraped ink will fall directly into the collection frame 28. The filter plate 29 will perform preliminary filtration of the ink to remove impurities. If the ink in the collection frame 28 needs to be reused or processed, the valve installed inside the ink discharge pipe 31 can be opened, and the ink will be discharged from the collection frame 28 through the ink discharge pipe 31. The handle 30 installed on one side of the collection frame 28 makes it convenient for the staff to pull the collection frame 28. By sliding the slide plate 27 in the slide rail 26, the collection frame 28 can be removed from the groove 25 for subsequent cleaning.

[0028] Please see Figure 1-3 As shown, one end of the workbench 1 is provided with an upward-opening slide groove 14. A sliding block 17 is slidably installed inside the slide groove 14. A screw hole is provided inside the sliding block 17. A threaded rod 15 is rotatably installed inside the slide groove 14 through the screw hole. A rotating handle 16 is installed at one end of the threaded rod 15.

[0029] A mounting plate 18 is installed on the top side of the sliding block 17. A rectangular groove 19 is formed inside the mounting plate 18, and a slider 20 is slidably installed inside the rectangular groove 19. The mounting bracket 2 is installed on one side of the slider 20. A locking screw 21 is rotatably installed inside the slider 20. Seven threaded holes are equidistantly formed inside the mounting plate 18 on one side of the rectangular groove 19. One end of the locking screw 21 passes through the threaded holes. During operation, the printing press is a machine for printing text and images. During the printing process on decorative materials... Printing rollers are used to print on the substrate. During printing, ink residue remains on the printing rollers, affecting subsequent printing. Therefore, a doctor blade is needed to remove the ink. To ensure the treatment effect on the printing rollers, the rotating handle 16 is rotated, which drives the threaded rod 15 to rotate. This causes the sliding block 17 to move horizontally within the groove 14. Consequently, the mounting plate 18 and the doctor blade 4 are adjusted horizontally as the sliding block 17 moves horizontally, thus accommodating printing plates of different thicknesses.

[0030] After the doctor blade 4 is adjusted to the correct angle, if its position is too far from the printing roller body 24, which is not conducive to ink scraping, the vertical position of the doctor blade 4 can be adjusted by adjusting the position of the slider 20 in the rectangular groove 19. First, loosen the locking screw 21 so that the slider 20 can slide freely in the rectangular groove 19. Then, manually push the slider 20 up and down in the rectangular groove 19 so that the doctor blade 4 will also move up and down. When the doctor blade 4 is adjusted to a suitable vertical position, it will contact the printing roller. Then, rotate the locking screw 21 so that one end of the locking screw 21 passes through the threaded hole, thereby fixing the slider 20 in the rectangular groove 19 and ensuring that the doctor blade 4 can contact the printing roller body 24 well.

[0031] Working principle: When it is necessary to adjust the angle of the doctor blade 4, first grasp the movable block 10 and move it towards the limiting block 9. During this process, the movable block 10 compresses the compression spring 11, and the ring 12 also moves accordingly, causing the locking block 13 on the inner wall of the ring 12 to disengage from the locking groove 7 inside the circular block 6. At this time, turn the handle 5, and the handle 5 drives the rotating shaft 3 to rotate. The angle of the doctor blade 4 will change with the rotation of the rotating shaft 3. When the doctor blade 4 is adjusted to the appropriate angle, release the movable block 10. Under the reaction force of the compression spring 11, the movable block 10 moves away from the limiting block 9, and the ring 12 also moves accordingly. The locking block 13 is locked into the locking groove 7 again, thereby fixing the rotating shaft 3 and preventing it from rotating accidentally, so that the doctor blade 4 is kept at this angle, and then the angle of the doctor blade 4 is adjusted so that the doctor blade 4 can better fit the printing roller and improve the doctor blade effect.

[0032] Rotate the rotating handle 16, which drives the threaded rod 15 to rotate, causing the sliding block 17 to move horizontally within the slide groove 14. This will cause the mounting plate 18 and the doctor blade 4 to adjust their positions in the horizontal direction as the sliding block 17 moves horizontally, thus adapting to printing plates of different thicknesses.

[0033] After the doctor blade 4 is adjusted to the right angle, if its position is too far from the printing roller body 24, it will be difficult to scrape ink. The vertical position of the doctor blade 4 can be adjusted by adjusting the position of the slider 20 in the rectangular groove 19. First, loosen the locking screw 21 so that the slider 20 can slide freely in the rectangular groove 19. Then, manually push the slider 20 up and down in the rectangular groove 19 so that the doctor blade 4 will also move up and down. When the doctor blade 4 is adjusted to a suitable vertical position, it will contact the printing roller. Then, rotate the locking screw 21 so that one end of the locking screw 21 passes through the threaded hole, thereby fixing the slider 20 in the rectangular groove 19 and ensuring that the doctor blade 4 can contact the printing roller body 24 well.

[0034] When the doctor blade 4 performs the doctoring operation on the printing roller body 24, the scraped ink will fall directly into the collection frame 28. The filter plate 29 will perform preliminary filtration of the ink to remove impurities. If the ink in the collection frame 28 needs to be reused or processed, the valve installed inside the ink discharge pipe 31 can be opened, and the ink will be discharged from the collection frame 28 through the ink discharge pipe 31. The handle 30 installed on one side of the collection frame 28 makes it convenient for the staff to pull the collection frame 28. By sliding the slide plate 27 in the slide rail 26, the collection frame 28 can be removed from the groove 25 for subsequent cleaning.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A doctor blade for a printing press roller, characterized in that: Includes a workbench (1), a mounting frame (2) is mounted on top of the workbench (1), a rotating shaft (3) is mounted through both sides of the mounting frame (2), a scraper (4) is mounted on the outer side of the rotating shaft (3), a handle (5) is mounted on one end of the rotating shaft (3), a circular block (6) is mounted on the outer side of one end of the rotating shaft (3), and several slots (7) are equidistantly opened inside the circular block (6). A positioning rod (8) is fixedly connected to one side of the mounting frame (2). One end of the positioning rod (8) is fixedly connected to a limiting block (9). A movable block (10) is slidably installed on the outside of the positioning rod (8). A compression spring (11) is fixed between the movable block (10) and the limiting block (9). The compression spring (11) is sleeved on the outside of the positioning rod (8). A ring (12) is installed on one side of the movable block (10). The ring (12) is sleeved on the outside of the circular block (6). Several locking blocks (13) that match the locking groove (7) are installed at equal intervals on the inner wall of the ring (12).

2. The doctor blade for a printing press roller according to claim 1, characterized in that: The workbench (1) has an upward-opening groove (14) at one end. A sliding block (17) is slidably installed inside the groove (14). A screw hole is opened inside the sliding block (17). A threaded rod (15) is rotatably installed inside the groove (14). A rotating handle (16) is installed at one end of the threaded rod (15).

3. The doctor blade for a printing press roller according to claim 2, characterized in that: A mounting plate (18) is installed on the top side of the sliding block (17). A rectangular groove (19) is provided inside the mounting plate (18). A slider (20) is slidably installed inside the rectangular groove (19). The mounting bracket (2) is installed on one side of the slider (20). A locking screw (21) is rotatably installed inside the slider (20). Seven threaded holes are equidistantly provided inside the mounting plate (18) on one side of the rectangular groove (19). One end of the locking screw (21) passes through the threaded hole.

4. The doctor blade for a printing press roller according to claim 3, characterized in that: Two support plates (22) are symmetrically installed on the other end of the top side of the workbench (1). A rotating shaft (23) is installed between the two sides of the support plate (22), and a printing roller body (24) is installed on the outside of the rotating shaft (23).

5. The doctor blade for a printing press roller according to claim 2, characterized in that: The other end of the worktable (1) has a groove (25) inside. Two upward-opening slide rails (26) are symmetrically opened on the bottom side of the groove (25). A slide plate (27) is slidably installed inside the slide rail (26). A collection frame (28) is installed on the top side of the slide plate (27). The collection frame (28) is located directly below the printing roller body (24). A handle (30) is installed on one side of the collection frame (28).

6. The doctor blade for a printing press roller according to claim 5, characterized in that: A filter plate (29) is installed inside the top of the collection frame (28), and an ink discharge pipe (31) is connected to the bottom edge of the collection frame (28). A valve is installed inside the ink discharge pipe (31).

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