Self-adaptive pressure adjusting device of photogravure press

Abstract

The invention relates to the technical field of gravure printing equipment, and discloses a gravure printing machine pressure self-adaptive adjusting device which comprises a fixing column, the side wall of the fixing column is fixedly connected with fixing frames, moving assemblies are arranged in the fixing frames, a connecting frame is fixedly connected between the fixing frames, and a retarding assembly is arranged at the bottom of the connecting frame. The bottom of the retarding assembly is connected with an adjusting assembly; the adjusting assembly comprises a connecting frame and a cam, the connecting frame is arranged between the fixing frames, and the side walls of the cam are rotationally connected to the two sides of the connecting frame. The device realizes pressure regulation through a multi-stage pressure regulation mechanism, the cam is matched with the spring to compensate fluctuation, and the damper weakens vibration; the distance is conveniently adjusted through gear and rack transmission, and the device is suitable for multiple materials; the stable frame and the protective structure improve reliability, solve the problems that an existing device is low in pressure regulating precision, tedious in operation and short in service life, and improve printing quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of gravure printing equipment technology, specifically to a pressure adaptive adjustment device for a gravure printing machine. Background Technology

[0002] Gravure printing is widely used in packaging printing, label printing and other fields due to its advantages such as high printing precision and thick ink layer. The pressure stability between the impression roller and the printing plate cylinder during the printing process directly determines the quality of the printed products.

[0003] Existing gravure printing presses often employ manual mechanical adjustment or a single elastic component for pressure compensation. Manual adjustment requires operators to rely on experience to adjust the pressure roller spacing using lead screws, bolts, and other components. This is not only cumbersome and inefficient, but also makes it difficult to accurately match the pressure requirements of printing materials of varying thicknesses. Repeated calibration is necessary when switching operating conditions, significantly impacting production efficiency. Even when some devices use springs or other elastic components for pressure compensation, the lack of effective buffering and guiding structures means that vibrations can cause excessive pressure fluctuations during high-speed printing or when material thickness varies, leading to printing defects such as uneven ink distribution and blurred patterns.

[0004] Meanwhile, existing spacing adjustment mechanisms are mostly single-sided driven or lack synchronous guidance, making the pressure roller prone to tilting during adjustment. This exacerbates component wear and reduces printing accuracy. Furthermore, the power components lack effective protective structures, making them susceptible to dust and other impurities during long-term use, shortening equipment lifespan and increasing maintenance costs. Based on these shortcomings of existing technologies, a pressure adaptive adjustment device for gravure printing machines is needed that offers precise pressure regulation, convenient spacing adjustment, and a stable structure to address the deficiencies of existing equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pressure adaptive adjustment device for gravure printing machines. This device solves the problems of low pressure adjustment accuracy and susceptibility to vibration leading to printing defects in existing devices. It also solves the defects of cumbersome manual adjustment of pressure roller spacing, low efficiency in switching operating conditions, and poor adaptability. Furthermore, it overcomes the problems of insufficient structural stability, easy wear of components, and short service life due to lack of protection for power components in existing devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure adaptive adjustment device for a gravure printing machine, comprising a fixed column: The fixed column sidewall is fixedly connected to a fixed frame, the fixed frame is provided with a movable component inside, the fixed frames are fixedly connected to each other with a connecting frame, the bottom of the connecting frame is provided with a damping component, and the bottom of the damping component is connected to an adjusting component; The adjusting assembly includes a connecting frame and a cam. The connecting frame is disposed between the fixed frames. The sidewalls of the cam are rotatably connected to both sides of the connecting frame. An upper pressure roller is rotatably connected inside the connecting frame. A connecting rod is fixedly connected to the upper surface of the connecting frame. A connecting plate is disposed at the bottom of the connecting frame. A sleeve is fixedly connected to the bottom of the connecting plate. The sidewall of the connecting rod is slidably connected inside the sleeve. A first spring is disposed inside the sleeve. One end of the first spring is fixedly connected inside the sleeve, and the other end of the first spring is fixedly connected to the sidewall of the connecting rod.

[0007] Preferably, multiple sleeves and connecting rods are provided, and the number of both is equal and arranged in a linear array.

[0008] Preferably, the damping component includes a damper, which is fixedly installed between the connecting frame and the connecting plate. The connecting frame has a fixing groove inside, and a slide rod is provided inside the connecting frame. The slide rod is fixedly connected inside the fixing groove, and a second spring is sleeved on the side wall of the slide rod. A connecting component is provided on the side wall of the slide rod.

[0009] Preferably, the connecting assembly includes a slider, which is slidably connected to both sides of the slider rod. The second spring is fixedly connected between the sliders. A connecting block is fixedly connected to the bottom of the slider. A pair of fixing blocks are fixedly connected to the upper surface of the connecting plate. A rotating rod is rotatably connected to the side wall of the fixing block. The other end of the rotating rod is rotatably connected to the side wall of the connecting block.

[0010] Preferably, the moving component includes a transverse groove and a first sliding block. The transverse groove is formed inside the fixed frame, and a lower pressure roller is arranged between the fixed frames. The sidewall of the first sliding block is fixedly connected to both sides of the lower pressure roller, and a first slide rail is arranged inside one side of the fixed frame.

[0011] Preferably, the moving component further includes a second slide rail and a rack, the second slide rail being disposed inside the fixing frame on the other side, the rack being disposed on the side wall of the second slide rail, and the first slide block being slidably connected to the side wall of the first slide rail and the side wall of the second slide rail inside the slide block.

[0012] Preferably, the first slide rail and the sidewall of the second slide rail are fixedly connected inside the transverse groove, the sidewall of the first slide block is slidably connected inside the transverse groove, and a rotating component is provided inside one side of the fixed frame.

[0013] Preferably, the rotating assembly includes a rotating column and a gear. The side wall of the rotating column is rotatably connected to the inside of the fixed frame, and the gear is fixedly connected to the side wall of the rotating column. A dustproof frame is fixedly connected to the bottom of one side of the fixed frame, and a motor is installed inside the dustproof frame. The output end of the motor is connected to the rotating column.

[0014] Preferably, the rack meshes with the gear, and a second sliding block is fixedly connected to the side wall of the rack. The side wall of the second sliding block is slidably connected to the side wall of the second slide rail and the inside of the transverse groove.

[0015] Preferably, the cam sidewall is rotatably connected to the upper surface of the first slide block, and the rack sidewall is slidably connected inside the transverse groove.

[0016] In summary, the present invention has at least one of the following beneficial technical effects: 1. This invention establishes a multi-stage pressure regulation mechanism—from initial compensation to buffered stability to adaptive fine-tuning—by adjusting the cooperation between the cam and the first spring in the assembly and mitigating the buffering design of the damper and the second spring in the assembly. The cam can adjust its contact position with the connecting frame in real time according to changes in material thickness. The first and second springs compensate for pressure fluctuations through elastic deformation, and the damper weakens vibrations, effectively avoiding problems such as uneven ink distribution and blurred patterns caused by uneven pressure, thus improving the consistency of printed materials.

[0017] 2. The device utilizes a gear and rack transmission structure driven by a motor, along with the guiding action of the first and second slide rails, to achieve smooth movement of the lower pressure roller. The motor power is transmitted to the gears via a rotating column, and the meshing rack drives the first slide block to slide together. This allows for quick adjustment of the gap between the upper and lower pressure rollers without repeated manual calibration, adapting to printing materials such as paper and film of different thicknesses, reducing operational difficulty and improving the efficiency of switching between working conditions.

[0018] 3. The fixed column and fixed frame form a stable frame. Each component is precisely assembled through guiding structures such as connecting rods, sleeves, sliders, and slide bars to prevent component displacement during operation. The dustproof frame protects the motor and reduces dust interference. The buffering effect of springs and dampers reduces rigid impact between components, reduces wear, extends the overall service life of the device, and reduces maintenance costs. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the fixing frame of the present invention; Figure 3 This is a schematic diagram of the pressure roller structure of the present invention; Figure 4 This is a schematic diagram of the connecting frame structure of the present invention; Figure 5 This is a schematic diagram of the buffer frame structure of the present invention; Figure 6 This is a schematic diagram of the back structure of the buffer frame of the present invention; Figure 7 This is a schematic diagram of the internal structure of the fixing frame of the present invention; Figure 8This is a schematic diagram of the movable structure of the present invention.

[0020] The components are as follows: 1. Fixed column; 2. Fixed frame; 3. Lower pressure roller; 4. Upper pressure roller; 5. Connecting frame; 6. Connecting plate; 7. Connecting frame; 8. Cam; 9. Sleeve; 10. Connecting rod; 11. First spring; 12. Fixed groove; 13. Damper; 14. Slide rod; 15. Slider; 16. Connecting block; 17. Fixed block; 18. Rotating rod; 19. Second spring; 20. First slide block; 21. First slide rail; 22. Horizontal groove; 23. Rotating column; 24. Gear; 25. Motor; 26. Dustproof frame; 27. Second slide rail; 28. Rack; 29. ​​Second slide block. Detailed Implementation

[0021] Please see the appendix Figure 1 - Appendix Figure 8 This invention provides a pressure adaptive adjustment device for a gravure printing machine, including a fixed column 1: The fixed column 1 is fixedly connected to the side wall of the fixed frame 2. The fixed frame 2 is equipped with a movable component. The fixed frames 2 are fixedly connected to each other by a connecting frame 5. The bottom of the connecting frame 5 is equipped with a speed-reducing component. The bottom of the speed-reducing component is connected to an adjusting component. The adjustment assembly includes a connecting frame 7 and a cam 8. The connecting frame 7 is disposed between the fixed frames 2. The side walls of the cam 8 are rotatably connected to both sides of the connecting frame 7. An upper pressure roller 4 is rotatably connected inside the connecting frame 7. A connecting rod 10 is fixedly connected to the upper surface of the connecting frame 7. A connecting plate 6 is provided at the bottom of the connecting frame 5. A sleeve 9 is fixedly connected to the bottom of the connecting plate 6. The side wall of the connecting rod 10 is slidably connected to the inside of the sleeve 9. A first spring 11 is provided inside the sleeve 9. One end of the first spring 11 is fixedly connected to the inside of the sleeve 9, and the other end of the first spring 11 is fixedly connected to the side wall of the connecting rod 10.

[0022] The fixed column 1 supports the fixed frame 2, providing a stable installation foundation for the entire device, preventing shaking during operation, and ensuring the stability of the printing process. The fixed frame 2, together with the connecting frame 5, forms the main frame of the device, used to install the moving components, the damping components, and the adjusting components, achieving the effect of orderly assembly and coordinated operation of all parts. The connecting frame 5 supports the damping components, providing an installation carrier for the connecting plate 6 and the adjusting components below, while also buffering pressure fluctuations by mitigating the components, thus enhancing the device's pressure regulation capability. In the adjustment assembly, the connecting frame 7 rotates in conjunction with the upper pressure roller 4, thereby driving the upper pressure roller 4 and the lower pressure roller 3 to apply pressure to the printing material, achieving the printing effect of ink transfer; the cam 8 rotates in conjunction with the connecting frame 7, adjusting the pressure of the upper pressure roller 4 by changing its contact position with the connecting frame 7, achieving a pressure adjustment effect to adapt to different material thicknesses; the connecting rod 10 slides in conjunction with the sleeve 9, providing guidance for the movement of the connecting frame 7 and limiting its direction of movement, achieving the effect of preventing the connecting frame 7 from deviating and ensuring uniform force on the upper pressure roller 4; the first spring 11 elastically deforms in conjunction with the connecting rod 10, buffering the pressure fluctuations of the connecting frame 7, achieving a preliminary pressure adaptive compensation effect.

[0023] Please see the appendix Figure 1 - Appendix Figure 8 Multiple sleeves 9 and connecting rods 10 are provided, and the number of both is consistent and arranged in a linear array.

[0024] Multiple sleeves 9 and connecting rods 10 slide synchronously, making the connecting frame 7 more evenly stressed and preventing the upper pressure roller 4 from tilting, thus ensuring consistent printing pressure.

[0025] Please see the appendix Figure 1 - Appendix Figure 8 The damping component includes a damper 13, which is fixedly installed between the connecting frame 5 and the connecting plate 6. The connecting frame 5 has a fixing groove 12 inside, and a slide rod 14 is provided inside the connecting frame 5. The slide rod 14 is fixedly connected inside the fixing groove 12. A second spring 19 is sleeved on the side wall of the slide rod 14, and a connecting component is provided on the side wall of the slide rod 14.

[0026] In the damping component, the damper 13 works with the connecting plate 6 to buffer and reduce the vibration during device operation, thus avoiding excessive pressure fluctuations; the slide bar 14 works with the slider 15 to slide, providing a track for the slider 15 and limiting its sliding direction, thus ensuring the stable transmission of buffering force; the second spring 19 works with the slider 15 to elastically deform, further buffering the impact force on the connecting plate 6, thus enhancing the stability of pressure regulation.

[0027] Please see the appendix Figure 1 - Appendix Figure 8The connecting assembly includes a slider 15, which is slidably connected to both sides of a slide rod 14. A second spring 19 is fixedly connected between the sliders 15. A connecting block 16 is fixedly connected to the bottom of the slider 15. A pair of fixing blocks 17 are fixedly connected to the upper surface of the connecting plate 6. A rotating rod 18 is rotatably connected to the side wall of the fixing block 17. The other end of the rotating rod 18 is rotatably connected to the side wall of the connecting block 16.

[0028] In the connecting assembly, the slider 15 slides in conjunction with the slide rod 14, causing the second spring 19 to deform and transmit the buffering force, thus converting the force on the connecting plate 6 into the spring deformation force; the rotating rod 18 rotates in conjunction with the connecting block 16 and the fixed block 17, converting the vertical movement of the connecting plate 6 into the horizontal sliding of the slider 15, thus achieving the effect of transmitting the buffering force.

[0029] Please see the appendix Figure 1 - Appendix Figure 8 The moving component includes a transverse groove 22 and a first sliding block 20. The transverse groove 22 is opened inside the fixed frame 2. A lower pressure roller 3 is arranged between the fixed frames 2. The side wall of the first sliding block 20 is fixedly connected to both sides of the lower pressure roller 3. A first slide rail 21 is arranged inside one side of the fixed frame 2.

[0030] Please see the appendix Figure 1 - Appendix Figure 8 The moving component also includes a second slide rail 27 and a rack 28. The second slide rail 27 is disposed inside the other side of the fixed frame 2, and the rack 28 is disposed on the side wall of the second slide rail 27. The first slide block 20 is slidably connected to the side wall of the first slide rail 21 and the second slide rail 27.

[0031] Please see the appendix Figure 1 - Appendix Figure 8 The first slide rail 21 and the second slide rail 27 are fixedly connected to the side walls inside the transverse groove 22, the first slide block 20 is slidably connected to the side walls inside the transverse groove 22, and a rotating component is provided inside the side fixing frame 2.

[0032] In the moving assembly, the transverse groove 22 moves in conjunction with the first sliding block 20 and the second sliding block 29, providing space for movement and ensuring smooth movement of the component; the lower pressure roller 3 rotates in conjunction with the upper pressure roller 4, serving as a printing plate cylinder to carry the printing pattern, thus achieving the effect of printing in conjunction with the upper pressure roller 4; the first sliding block 20 slides in conjunction with the first slide rail 21 and the second slide rail 27, supporting and driving the lower pressure roller 3 to move, thus adjusting the distance between the upper and lower pressure rollers; the second slide rail 27 slides in conjunction with the second sliding block 29, providing guidance for the rack 28 and the first sliding block 20 on the other side, thus ensuring the smooth movement of the lower pressure roller 3.

[0033] Please see the appendix Figure 1 - Appendix Figure 8The rotating assembly includes a rotating column 23 and a gear 24. The side wall of the rotating column 23 is rotatably connected to the inside of the fixed frame 2. The gear 24 is fixedly connected to the side wall of the rotating column 23. A dustproof frame 26 is fixedly connected to the bottom of one side of the fixed frame 2. A motor 25 is installed inside the dustproof frame 26. The output end of the motor 25 is connected to the rotating column 23.

[0034] In the rotating assembly, the rotating column 23 rotates in conjunction with the motor 25, transmitting power to the motor 25 and driving the gear 24 to rotate, thus achieving the effect of driving the rack 28 to move; the gear 24 meshes with the rack 28 to convert rotational motion into linear motion, thus achieving the effect of adjusting the position of the lower pressure roller 3; the dustproof frame 26 works with the motor 25 to protect it from dust, thus ensuring the stable operation of the motor 25; the motor 25 works with the rotating column 23 to output power, providing power for the movement of the lower pressure roller 3, thus achieving the effect of automated position adjustment of the lower pressure roller 3.

[0035] Please see the appendix Figure 1 - Appendix Figure 8 The rack 28 meshes with the gear 24. A second slide block 29 is fixedly connected to the side wall of the rack 28. The side wall of the second slide block 29 is slidably connected to the side wall of the second slide rail 27 and the inside of the transverse groove 22.

[0036] Please see the appendix Figure 1 - Appendix Figure 8 The sidewall of the cam 8 is rotatably connected to the upper surface of the first slide block 20, and the sidewall of the rack 28 is slidably connected inside the transverse groove 22.

[0037] The second slide block 29 slides in conjunction with the second slide rail 27, connecting the rack 28 and the second slide rail 27, thus ensuring the stability of the rack 28's movement; the cam 8 rotates in conjunction with the first slide block 20, adjusting its contact state with the connecting frame 7 as the lower pressure roller 3 moves, thus achieving the effect of auxiliary pressure adjustment.

[0038] Working principle: After the motor 25 is started, the dustproof frame 26 forms a dustproof protection for the motor 25. The motor 25 outputs power to drive the rotating column 23 to rotate. The rotating column 23 synchronously drives the gear 24 to rotate. The gear 24 meshes with the rack 28, converting the rotational motion into linear motion. The rack 28 slides smoothly along the second slide rail 27 and the transverse groove 22 through the second slide block 29, thereby driving the first slide block 20 that cooperates with it to move, so that the lower pressure roller 3 slides along the first slide rail 21 and the second slide rail 27, completing the adjustment of the distance with the upper pressure roller 4 to match the thickness of the material to be printed. Upon entering the printing operation stage, the printing material first enters between the upper pressure roller 4 and the lower pressure roller 3. If the material thickness changes during the printing process, the cam 8 rotates. When the cam 8 rotates, it changes the contact position of the connecting frame 7, pushing the connecting frame 7 to drive the upper pressure roller 4 to make fine adjustments. In conjunction with the deformation of the first spring 11, the pressure between the upper pressure roller 4 and the lower pressure roller 3 is adjusted in real time to ensure the uniformity of the printing pressure. The upper pressure roller 4 is squeezed by the material along with the connecting frame 7, causing the connecting rod 10 to slide inside the sleeve 9. The first spring 11 undergoes elastic deformation and applies a reverse force to the connecting frame 7 through the rebound force, initially compensating for the pressure fluctuation caused by the material thickness. Subsequently, the force on the connecting frame 7 is transmitted to the connecting plate 6, which drives the fixed block 17 to move. The rotating rod 18 rotates around the fixed block 17 and the connecting block 16, converting the vertical movement of the connecting plate 6 into the horizontal sliding of the slider 15 along the sliding rod 14. The slider 15 compresses the second spring 19, and the second spring 19 further buffers the pressure impact through deformation. At the same time, the damper 13 weakens the vibration during the operation of the device and avoids excessive pressure fluctuation.

Claims

1. A pressure adaptive adjustment device for a gravure printing machine, characterized in that, Including fixed column (1): The fixed column (1) is fixedly connected to the side wall of the fixed frame (2), the fixed frame (2) is provided with a moving component inside, the fixed frames (2) are fixedly connected to each other with a connecting frame (5), the bottom of the connecting frame (5) is provided with a slowing component, and the bottom of the slowing component is connected to an adjusting component; The adjustment assembly includes a connecting frame (7) and a cam (8). The connecting frame (7) is disposed between the fixed frame (2). The sidewall of the cam (8) is rotatably connected to both sides of the connecting frame (7). An upper pressure roller (4) is rotatably connected inside the connecting frame (7). A connecting rod (10) is fixedly connected to the upper surface of the connecting frame (7). A connecting plate (6) is provided at the bottom of the connecting frame (5). A sleeve (9) is fixedly connected to the bottom of the connecting plate (6). The sidewall of the connecting rod (10) is slidably connected inside the sleeve (9). A first spring (11) is provided inside the sleeve (9). One end of the first spring (11) is fixedly connected inside the sleeve (9), and the other end of the first spring (11) is fixedly connected to the sidewall of the connecting rod (10).

2. The pressure adaptive adjustment device for a gravure printing machine according to claim 1, characterized in that, Multiple sleeves (9) and multiple connecting rods (10) are provided, and the number of both is equal and arranged in a linear array.

3. The pressure adaptive adjustment device for a gravure printing machine according to claim 1, characterized in that, The damping component includes a damper (13), which is fixedly installed between the connecting frame (5) and the connecting plate (6). The connecting frame (5) has a fixing groove (12) inside, and a slide rod (14) is provided inside the connecting frame (5). The slide rod (14) is fixedly connected inside the fixing groove (12). A second spring (19) is sleeved on the side wall of the slide rod (14), and a connecting component is provided on the side wall of the slide rod (14).

4. The pressure adaptive adjustment device for a gravure printing machine according to claim 3, characterized in that, The connecting assembly includes a slider (15), which is internally slidably connected to both sides of the slide rod (14). The second spring (19) is fixedly connected between the sliders (15). A connecting block (16) is fixedly connected to the bottom of the slider (15). A pair of fixing blocks (17) are fixedly connected to the upper surface of the connecting plate (6). A rotating rod (18) is rotatably connected to the side wall of the fixing block (17). The other end of the rotating rod (18) is rotatably connected to the side wall of the connecting block (16).

5. The pressure adaptive adjustment device for a gravure printing machine according to claim 1, characterized in that, The moving component includes a transverse groove (22) and a first sliding block (20). The transverse groove (22) is opened inside the fixed frame (2). A lower pressure roller (3) is arranged between the fixed frames (2). The side wall of the first sliding block (20) is fixedly connected to both sides of the lower pressure roller (3). A first slide rail (21) is arranged inside one side of the fixed frame (2).

6. The pressure adaptive adjustment device for a gravure printing machine according to claim 5, characterized in that, The moving component also includes a second slide rail (27) and a rack (28). The second slide rail (27) is disposed inside the fixing frame (2) on the other side, and the rack (28) is disposed on the side wall of the second slide rail (27). The first slide block (20) is slidably connected to the side wall of the first slide rail (21) and the second slide rail (27).

7. The pressure adaptive adjustment device for a gravure printing machine according to claim 6, characterized in that, The first slide rail (21) and the second slide rail (27) are fixedly connected to the side wall inside the transverse groove (22), the side wall of the first slide block (20) is slidably connected to the side wall inside the transverse groove (22), and a rotating component is provided inside the fixed frame (2) on one side.

8. The pressure adaptive adjustment device for a gravure printing machine according to claim 7, characterized in that, The rotating assembly includes a rotating column (23) and a gear (24). The side wall of the rotating column (23) is rotatably connected to the inside of the fixed frame (2). The gear (24) is fixedly connected to the side wall of the rotating column (23). A dustproof frame (26) is fixedly connected to the bottom of one side of the fixed frame (2). A motor (25) is installed inside the dustproof frame (26). The output end of the motor (25) is connected to the rotating column (23).

9. The pressure adaptive adjustment device for a gravure printing machine according to claim 8, characterized in that, The rack (28) meshes with the gear (24), and a second slide block (29) is fixedly connected to the side wall of the rack (28). The side wall of the second slide block (29) is slidably connected to the side wall of the second slide rail (27) and the inside of the transverse groove (22).

10. The pressure adaptive adjustment device for a gravure printing machine according to claim 6, characterized in that, The sidewall of the cam (8) is rotatably connected to the upper surface of the first slide block (20), and the sidewall of the rack (28) is slidably connected inside the transverse groove (22).

Images