Ink scraping mechanism for offset press

Abstract

The ink scraping mechanism comprises a base, a supporting frame and a vertical frame are arranged at the top of the base, a roller is rotationally connected to the inner side of the supporting frame, a mounting base is arranged at the top of the vertical frame, the top of the mounting base is connected with a cover plate through two clamping mechanisms, and a flexible supporting mechanism is arranged between the mounting base and the cover plate. The flexible supporting mechanism can provide certain elastic buffering and supporting for the blade, so that the blade can be better attached to the roller, the pressing mechanism is arranged, replacement and maintenance of the blade are facilitated, the clamping mechanism is arranged, the clamping mechanism is used for clamping the blade, and the blade can be better attached to the roller. According to the ink scraping mechanism, the cover plate can be conveniently opened and closed and closed when the blade is installed and maintained, the cover plate and the installation base are beneficial to keeping the stability and safety of the ink scraping mechanism, and therefore through the structure, the problem of non-uniform ink scraping is effectively solved, meanwhile, the blade can be conveniently disassembled, assembled, replaced and maintained, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically to a doctor blade mechanism for offset printing machines. Background Technology

[0002] Offset printing presses are a type of planographic printing press. During the operation of an offset printing press, the doctor blade plays a crucial role. It is responsible for scraping off excess ink from the surface of the printing plate rollers to ensure that the amount of ink transferred to the substrate is uniform and meets the printing requirements.

[0003] However, existing offset printing press doctoring mechanisms have many problems: traditional doctor blades usually have a rigid structure, which makes it difficult to fully conform to the slight undulations on the printing plate surface when in contact with the printing plate roller, resulting in uneven ink scraping, ink accumulation, or incomplete ink scraping, affecting the quality of printed products. Due to the high friction between the rigid doctor blade and the printing plate roller, the doctor blade wears out quickly during long-term high-speed operation, and replacing the doctor blade is time-consuming and laborious, reducing production efficiency. Therefore, it is necessary to design a doctoring mechanism for offset printing presses to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a doctor blade mechanism for offset printing machines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a doctor blade mechanism for an offset printing machine, comprising a base, a support frame and a vertical frame on the top of the base, a roller rotatably connected to the inner side of the support frame, a drive motor for facilitating the rotation of the roller mounted on one side of the support frame, a mounting seat on the top of the vertical frame, a cover plate hinged to one side of the top of the mounting seat, the other side of the cover plate being connected to the mounting seat via two sets of easily disassembled snap-fit ​​mechanisms, a flexible support mechanism between the mounting seat and the cover plate, and a blade mounted on the top of the flexible support mechanism via an easily disassembled pressing mechanism, one end of the blade extending to the outside of the mounting seat and fitting against the roller.

[0006] Preferably, the flexible support mechanism includes a blade holder. The inner side of the mounting base is provided with limiting rods near both ends and the blade holder is slidably connected to them. One side of the blade holder is connected to the inner wall of one side of the mounting base through two sets of second springs sleeved on the outer rings of the two sets of limiting rods. The top of the blade holder is provided with a mounting groove, and the blade is installed inside the mounting groove. The top of the blade is provided with a pressing mechanism to facilitate its disassembly and assembly.

[0007] Preferably, the pressing mechanism includes a pressure plate, and multiple sets of through holes are opened at the top of the blade near one end. A threaded groove is opened at the center of the top of the mounting groove. The pressure plate is provided at the top of the blade. The pressure plate is threadedly connected to a locking bolt. The locking bolt passes through the inner side of one set of through holes and is threadedly connected to the threaded groove. Multiple sets of limiting posts are provided at the bottom of the pressure plate, and the multiple sets of limiting posts are respectively adapted to the multiple sets of through holes.

[0008] Preferably, the locking mechanism includes an abutment groove and an abutment rod. Two sets of insertion grooves are provided near one end of the top of the mounting base. Two sets of through grooves are provided at the top of the insertion grooves. Two sets of abutment grooves are provided on the inner top of the insertion grooves. Two sets of movable grooves are correspondingly provided near one end of the top of the cover plate. A sleeve is slidably connected to the inner side of the movable groove and connected to the bottom of the movable groove via a first spring. A sliding rod is slidably connected to the inner side of the sleeve. One end of the sliding rod has a knob, and the other end extends to the outside of the cover plate. Two sets of abutment rods are symmetrically provided on its outer ring. The two sets of abutment rods are respectively adapted to the two sets of through grooves and the two sets of abutment grooves.

[0009] Preferably, a groove is provided on one side of the cover plate.

[0010] Preferably, the blade is made of a special wear-resistant alloy material.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. When the blade contacts the roller, if the roller surface is uneven or subjected to external impact during operation, the blade holder will be squeezed and slide backward. The second spring is compressed and stores elastic potential energy. When the protrusion on the roller surface passes, the second spring releases the elastic potential energy and pushes the blade holder forward, so that the blade is tightly attached to the roller surface again, ensuring the stability of the ink scraping effect. Thus, by setting it up, the blade and the roller can be tightly attached, effectively solving the problem of uneven ink scraping.

[0013] 2. This utility model uses a pressing mechanism to conveniently install the blade on top of the flexible support mechanism. The pressing mechanism is easy to disassemble and assemble, facilitating the replacement and maintenance of the blade. The cover plate is connected to the mounting base through a snap-fit ​​mechanism, which can be easily opened and closed during blade installation and maintenance. When closed, it cooperates with the mounting base to protect the internal flexible support mechanism and blade components, while also helping to maintain the stability and safety of the ink scraping mechanism. Thus, this design greatly improves the efficiency of blade maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a side view and a top view of the present invention;

[0016] Figure 3 This is a schematic diagram of the internal structure of the mounting base.

[0017] Figure 4 This is a split view of the internal structure of the mounting base;

[0018] Figure 5 This is a sectional view of the side of the mounting bracket.

[0019] Figure 6 for Figure 4 Enlarged view of part A in the image;

[0020] Figure 7 for Figure 5 Enlarged view of part B in the image.

[0021] In the diagram: 1. Base, 2. Support frame, 3. Roller, 4. Drive motor, 5. Stand, 6. Mounting seat, 7. Cover plate, 8. Insertion groove, 9. Through groove, 10. Abutment groove, 11. Movable groove, 12. Sleeve, 13. First spring, 14. Slide rod, 15. Knob, 16. Abutment rod, 17. Gutter, 18. Limiting rod, 19. Tool holder, 20. Second spring, 21. Mounting groove, 22. Threaded groove, 23. Blade, 24. Through hole, 25. Pressure plate, 26. Locking bolt, 27. Limiting post. 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 protection scope of the present utility model.

[0023] Example 1

[0024] Please refer to Figure 1-7 As shown, this utility model provides a doctor blade mechanism for an offset printing machine, including a base 1. The top of the base 1 is provided with a support frame 2 and a stand 5. A roller 3 is rotatably connected to the inner side of the support frame 2. A drive motor 4 for facilitating the rotation of the roller 3 is installed on one side of the support frame 2. A mounting seat 6 is provided on the top of the stand 5. A cover plate 7 is hinged to one side of the top of the mounting seat 6. The other side of the cover plate 7 is connected to the mounting seat 6 through two sets of easy-to-disassemble snap-fit ​​mechanisms. A flexible support mechanism is provided between the mounting seat 6 and the cover plate 7. A blade 23 is installed on the top of the flexible support mechanism through an easy-to-disassemble pressing mechanism. One end of the blade 23 extends to the outside of the mounting seat 6 and is in contact with the roller 3.

[0025] Specifically, the drive motor 4 can drive the connected roller 3 to rotate inside the support frame 2, providing a motion basis for subsequent ink scraping operations. The flexible support mechanism set between the mounting base 6 and the cover plate 7 can provide a certain elastic buffer and support for the blade 23, allowing it to better fit the surface of the roller 3. The blade 23 is conveniently installed on the top of the flexible support mechanism through the pressing mechanism, and the pressing mechanism is easy to disassemble and assemble, facilitating the replacement and maintenance of the blade 23. The cover plate 7 is connected to the mounting base 6 through a snap-fit ​​mechanism, which can be easily opened and closed during the installation and maintenance of the blade 23. When closed, it cooperates with the mounting base 6 to protect the internal flexible support mechanism and the blade 23 and other components, while also helping to maintain the stability and safety of the ink scraping mechanism. Thus, through the above structure, the blade 23 can fit tightly with the roller 3, effectively solving the problem of uneven ink scraping, and facilitating the disassembly, replacement and maintenance of the blade 23, greatly improving work efficiency.

[0026] The flexible support mechanism includes a tool holder 19. Limiting rods 18 are provided on the inner side of the mounting base 6 near both ends, and the tool holder 19 is slidably connected to them. One side of the tool holder 19 is connected to the inner wall of one side of the mounting base 6 via two sets of second springs 20 sleeved on the outer ring of the two sets of limiting rods 18. A mounting groove 21 is provided on the top of the tool holder 19, and the blade 23 is installed inside the mounting groove 21. The top of the blade 23 is provided with a pressing mechanism for easy assembly and disassembly. The limiting rods 18 serve as guides, restricting the movement direction of the tool holder 19 so that it can only slide along the axial direction of the limiting rods 18, ensuring the smooth operation of the tool holder 19. To ensure the stability and accuracy of the movement and avoid shaking or deviation during operation, when the blade 23 contacts the roller 3, if there is some unevenness on the surface of the roller 3 or if it is subjected to external impact during operation, the blade holder 19 will be squeezed and slide backward. The second spring 20 will be compressed and store elastic potential energy. When the protrusion on the surface of the roller 3 has passed, the second spring 20 will release the elastic potential energy and push the blade holder 19 forward, so that the blade 23 will be tightly attached to the surface of the roller 3 again, ensuring the stability of the ink scraping effect. In this way, the blade 23 can be tightly attached to the roller 3, effectively solving the problem of uneven ink scraping.

[0027] The clamping mechanism includes a pressure plate 25. Multiple through holes 24 are formed near one end of the top of the blade 23. A threaded groove 22 is formed at the center of the top of the mounting groove 21. The pressure plate 25 is located on the top of the blade 23, and a locking bolt 26 is threadedly connected to the pressure plate 25. The locking bolt 26 passes through the inner side of one of the through holes 24 and is threadedly connected to the threaded groove 22. Multiple limiting posts 27 are provided at the bottom of the pressure plate 25, and each of the limiting posts 27 is adapted to one of the through holes 24. When installing the blade 23, it is placed in the mounting groove 21 of the blade holder 19. At this time, the through holes 24 on the blade 23 are aligned with the threaded groove 22 at the top of the mounting groove 21. Then, when the pressure plate 25 is placed on top of the blade 23, the limiting post 27 is inserted into the through hole 24, which plays a preliminary positioning role, so that the position of the blade 23 in the mounting groove 21 is relatively fixed, preventing it from shifting in the horizontal direction. Then, by rotating the locking bolt 26, it is gradually screwed into the threaded groove 22. As the locking bolt 26 is screwed in, the pressure plate 25 will gradually press down on the blade 23, so that the blade 23 is fixed in the mounting groove 21, ensuring that the blade 23 will not loosen during the ink scraping operation, ensuring the stability and reliability of the ink scraping effect. Furthermore, by setting it up, the blade 23 can be easily disassembled, replaced and maintained, which greatly improves work efficiency.

[0028] The locking mechanism includes a contact groove 10 and a contact rod 16. Two sets of insertion grooves 8 are provided near one end of the top of the mounting base 6. Two sets of through grooves 9 are provided at the top of the insertion grooves 8. Two sets of contact grooves 10 are provided on the inner top of the insertion grooves 8. Two sets of movable grooves 11 are correspondingly provided near one end of the top of the cover plate 7. A sleeve 12 is slidably connected to the inner side of the movable groove 11 and connected to the bottom of the movable groove 11 via a first spring 13. A sliding rod 14 is slidably connected to the inner side of the sleeve 12. One end of the sliding rod 14 has a knob 15, and the other end of the sliding rod 14 extends to the outside of the cover plate 7. Two sets of contact rods 16 are symmetrically provided on its outer ring. The two sets of contact rods 16 are respectively adapted to the two sets of through grooves 9 and the two sets of contact grooves 10. By flipping the cover plate 7 and making it fit against the mounting base 6, and then pressing the knob 15, the knob 15 can squeeze the sleeve 12, which can then squeeze the first spring 13. 3. Compression is performed. At the same time, knob 15 can drive slide rod 14 and two sets of abutment rods 16 to move downward. The two sets of abutment rods 16 can move along the two sets of through grooves 9 to the inside of insertion groove 8. Then, by rotating knob 15, knob 15 can drive slide rod 14 and two sets of abutment rods 16 to rotate. When the two sets of abutment rods 16 rotate to align with the two sets of abutment grooves 10, by releasing knob 15, under the action of the reaction force of the first spring 13, sleeve 12 can be driven to move in the opposite direction. Sleeve 12 can drive knob 15 to move in the opposite direction. Knob 15 can drive slide rod 14 and two sets of abutment rods 16 to move in the opposite direction and engage with the two sets of abutment grooves 10, thereby completing the installation and fixing of cover plate 7 and mounting base 6. The cover plate 7 and mounting base 6 can be disassembled by reversing the operation. Thus, by setting, the mounting base 6 and cover plate 7 can be easily disassembled and assembled, so as to facilitate the replacement and maintenance of blade 23.

[0029] The cover plate 7 has a groove 17 on one side, which facilitates the opening and closing of the cover plate 7. The blade 23 is made of a special wear-resistant alloy material, which gives it good ink scraping performance and a long service life.

[0030] Working principle: First, when installing the blade 23, it is placed in the mounting groove 21 of the blade holder 19. At this time, the through hole 24 on the blade 23 corresponds to the threaded groove 22 at the top of the mounting groove 21. Then, when the pressure plate 25 is placed on top of the blade 23, the limiting post 27 is inserted into the through hole 24, which plays a preliminary positioning role. Then, by rotating the locking bolt 26, the locking bolt 26 will drive the pressure plate 25 to gradually press down on the blade 23, so that the blade 23 is fixed in the mounting groove 21. Then, by flipping the cover plate 7 and making the cover plate 7 fit with the mounting base 6, by pressing the knob 15, the knob 15 can squeeze the sleeve 12, and the sleeve 12 can press the first spring 13. During compression, the knob 15 can drive the slide rod 14 and the two sets of abutment rods 16 to move downwards. The two sets of abutment rods 16 can move along the two sets of through grooves 9 to the inside of the insertion groove 8. Then, by rotating the knob 15, the knob 15 can drive the slide rod 14 and the two sets of abutment rods 16 to rotate. When the two sets of abutment rods 16 rotate to align with the two sets of abutment grooves 10, by releasing the knob 15, under the action of the reaction force of the first spring 13, the sleeve 12 and the knob 15 can be driven to move in the opposite direction. The knob 15 can drive the slide rod 14 and the two sets of abutment rods 16 to move in the opposite direction and engage with the two sets of abutment grooves 10, thereby completing the installation and fixing of the cover plate 7 and the mounting base 6.

[0031] When the blade 23 contacts the roller 3, if the surface of the roller 3 is uneven or subjected to external impact during operation, the blade holder 19 will be squeezed and slide backward. The second spring 20 will be compressed and store elastic potential energy. When the protrusion on the surface of the roller 3 passes, the second spring 20 will release the elastic potential energy and push the blade holder 19 forward, so that the blade 23 will fit tightly against the surface of the roller 3 again, ensuring the stability of the ink scraping effect and thus completing the entire operation process.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dampening mechanism for an offset printing machine comprising a base (1), characterised in that: The top of the base (1) is provided with a support frame (2) and a stand (5), the inner side of the support frame (2) is rotatably connected with a roller (3), one side of the support frame (2) is provided with a driving motor (4) facilitating the rotation of the roller (3), the top of the stand (5) is provided with a mounting seat (6), one side of the top of the mounting seat (6) is hingedly connected with a cover plate (7), the other side of the cover plate (7) is connected with the mounting seat (6) through two sets of convenient-to-disassemble clamping mechanisms, a flexible supporting mechanism is arranged between the mounting seat (6) and the cover plate (7), the top of the flexible supporting mechanism is provided with a blade (23) through a convenient-to-disassemble pressing mechanism, one end of the blade (23) extends to the outside of the mounting seat (6) and is attached to the roller (3).

2. A dampening mechanism for an offset printing machine according to claim 1, characterized in that: The flexible supporting mechanism comprises a blade seat (19), the inner side of the mounting seat (6) is provided with a limiting rod (18) near both ends and is slidably connected with the blade seat (19), one side of the blade seat (19) is connected with the inner wall of one side of the mounting seat (6) through two sets of second springs (20) sleeved on the outer rings of the two sets of limiting rods (18), the top of the blade seat (19) is provided with a mounting groove (21), the blade (23) is mounted on the inner side of the mounting groove (21), and the top of the blade (23) is provided with a pressing mechanism facilitating the disassembly thereof.

3. A dampening mechanism for an offset printing machine according to claim 2, wherein: The pressing mechanism comprises a pressing plate (25), a plurality of through holes (24) are formed in the top of the blade (23) near one end, a threaded groove (22) is formed in the top center position of the mounting groove (21), the top of the blade (23) is provided with the pressing plate (25), the pressing plate (25) is threadedly connected with a locking bolt (26), the locking bolt (26) penetrates through the inner side of a set of the through holes (24) and is threadedly connected with the threaded groove (22), and the bottom of the pressing plate (25) is provided with a plurality of limiting columns (27), and the plurality of limiting columns (27) are respectively matched with the plurality of through holes (24).

4. The dampening mechanism for an offset printing machine according to claim 1, wherein: The clamping mechanism comprises abutting grooves (10) and abutting rods (16), two sets of insertion grooves (8) are formed in the top of the mounting seat (6) near one end, two sets of through grooves (9) are formed in the top of the insertion grooves (8), and two sets of the abutting grooves (10) are formed in the inner side top of the insertion grooves (8), two sets of movable grooves (11) are formed in the top of the cover plate (7) near one end, a sleeve (12) is slidably connected to the inner side of the movable groove (11) and connected to the bottom of the movable groove (11) through a first spring (13), a sliding rod (14) is slidably connected to the inner side of the sleeve (12), one end of the sliding rod (14) is provided with a knob (15), the other end of the sliding rod (14) extends to the outside of the cover plate (7), and the outer circle of the sliding rod (14) is symmetrically provided with two sets of the abutting rods (16), and the two sets of the abutting rods (16) are respectively matched with the two sets of the through grooves (9) and the two sets of the abutting grooves (10).

5. A dampening mechanism for an offset printing machine according to claim 4, wherein: One side of the cover plate (7) is provided with a notch (17).

6. The dampening mechanism for an offset printing machine according to claim 1, wherein: The blade (23) is made of a special wear-resistant alloy material.

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