Printing ink metering roller of lithographic printing machine

Abstract

The utility model discloses an ink metering roller of a lithographic printing machine, which relates to the technical field of ink metering rollers and comprises a metering roller component, the metering roller component comprises a roller body, a protective cover is arranged on one side of the roller body, an adjusting component is arranged in the middle of the protective cover, and a scraper component is fixedly mounted in the protective cover. The scraper assembly comprises a fixing strip, an adjusting scraper is fixedly mounted on the side, facing the roller body, of the fixing strip, a mounting groove is formed in the middle of the protective cover, the adjusting assembly comprises an adjusting cavity, the adjusting cavity is fixedly mounted in the mounting groove, a dial indicator is fixedly mounted on one side of the adjusting cavity, and a measuring head is arranged on one side of the dial indicator. The measuring head is arranged in the protective cover and abuts against the side face of the fixing strip. According to the utility model, the width of the gap between the scraper and the roller body can be more accurately and intuitively displayed and adjusted, so that the efficiency of adjusting the printing ink amount is improved, the waste of printing ink and paper is reduced, and the practical value is higher.

Description

Technical Field

[0001] This utility model relates to the field of ink metering roller technology, specifically to an ink metering roller for a offset printing press. Background Technology

[0002] A flatbed printing press, usually referring to a lithographic printing press, is a printing device based on the principle of lithography. Lithography is an indirect printing method. Its basic principle is to utilize the immiscibility of water and ink to transfer image information on a printing plate that is almost on the same plane. The ink metering roller of a lithographic printing press is a key component used to adjust and provide an ink layer of appropriate thickness. This component allows for precise control of the amount of ink reaching the printing plate, which is crucial for maintaining color consistency and image clarity.

[0003] Based on the above, the inventors have discovered the following problems: the ink metering rollers of current offset printing presses usually only have adjustment functions. After adjusting the ink volume, a trial print is performed, and then fine adjustments are made based on the results of the trial print. This adjustment method requires multiple trial prints, which easily leads to waste of ink and paper and is inconvenient to use.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an ink metering roller for a offset printing press, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide an ink metering roller for a offset printing press to solve the problems mentioned in the background art.

[0006] An ink metering roller for a offset printing press includes a metering roller assembly. The metering roller assembly includes a roller body, a protective cover on one side of the roller body, an adjustment component in the middle of the protective cover, and a doctor blade assembly fixedly installed inside the protective cover. The doctor blade assembly includes a fixing strip, and an adjusting doctor blade is fixedly installed on the fixing strip facing the roller body. An installation groove is formed in the middle of the protective cover, and the adjustment component includes an adjustment cavity. The adjustment cavity is fixedly installed inside the installation groove, and a dial indicator is fixedly installed on one side of the adjustment cavity. A probe is provided on one side of the dial indicator, and the probe is located inside the protective cover, with the probe abutting against the side of the fixing strip.

[0007] By adopting the above technical solution, the roller body facilitates the quantitative extraction of ink from the ink fountain, and the rotation transfers the ink to subsequent ink rollers. The protective cover prevents ink splattering during ink extraction. The adjustment component allows for adjustment of the ink thickness on the roller surface. The doctor blade assembly allows for adjustment of the relative position between the doctor blade assembly and the roller, facilitating the removal of excess ink from the roller surface. This achieves the function of adjusting the ink on the roller surface. The doctor blade adjustment allows for adjusting the gap between the doctor blade and the roller, thereby controlling the ink flow and removing excess ink. The mounting groove allows for the fixed installation of the adjustment component in the center of the protective cover. The probe abuts against the side of the fixing strip, allowing for the measurement of the fixing strip's displacement by a dial indicator. The measurement results can be magnified for a more accurate and intuitive display of the width of the gap between the doctor blade and the roller, thereby improving the efficiency of ink quantity adjustment and reducing ink and paper waste.

[0008] Furthermore, the fixing strip is provided with sliding sleeves at both ends, and the sliding sleeves are fixedly installed on the inner ends of the protective cover.

[0009] By adopting the above technical solution, the scraper assembly is fixedly installed on both ends of the inner side of the protective cover by the sliding sleeve, which makes it easy to fix the scraper assembly inside the protective cover.

[0010] Furthermore, a guide groove is provided on one side of the sliding sleeve, and the guide groove is slidably connected to the end of the fixing strip. A threaded rod is fixedly installed in the middle of one side of the fixing strip.

[0011] By adopting the above technical solution, the guide groove facilitates the limiting and guiding of the sliding of the fixing strip, so that the fixing strip can only slide along the guide groove.

[0012] Furthermore, connecting shafts are fixedly installed at both ends of the roller body, and a hexagonal groove is provided on one side of the connecting shaft.

[0013] By adopting the above technical solution, the connection between the rotating shaft and the hexagonal groove facilitates the provision of a reliable transmission interface, ensuring stable power transmission and thus stable control of the roller rotation.

[0014] Furthermore, a connecting seat is rotatably connected to the outside of the connecting shaft, one side of the connecting seat is fixedly connected to the protective cover, and a return groove is provided at the bottom of the protective cover.

[0015] By adopting the above technical solution, the device can be easily fixedly installed on the top of the ink fountain through the setting of the connecting seat and the return groove. The return groove facilitates the guidance of the excess ink scraped off by the doctor blade back into the ink fountain.

[0016] Furthermore, a rotating seat is fixedly installed in the middle of the inner side of the adjustment cavity, and a worm gear is rotatably connected inside the rotating seat.

[0017] By adopting the above technical solution, the rotating seat facilitates the rotational connection of the worm gear inside the adjustment cavity.

[0018] Furthermore, a threaded sleeve is fixedly installed in the middle of the worm gear, and the threaded sleeve is threadedly connected to the threaded rod.

[0019] By adopting the above technical solution, the threaded sleeve and threaded rod are connected by a threaded connection, which facilitates the rotation of the worm gear to adjust the position of the adjusting scraper.

[0020] Furthermore, the worm gear is meshed with a worm, and the worm is rotatably connected to the adjusting cavity.

[0021] By adopting the above technical solution, the worm gear is designed to facilitate the rotation of the worm gear and drive the worm wheel to rotate.

[0022] Furthermore, an adjustment knob is fixedly installed on the top of the worm gear, and the adjustment knob is located on the top of the adjustment cavity.

[0023] By adopting the above technical solution, and by adjusting the knob, it is easy to control the rotation of the worm gear by turning the knob, thereby fine-tuning the position of the adjusting scraper.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: The roller design facilitates the quantitative extraction of ink from the ink fountain, and the rotation transfers the ink to subsequent ink rollers. The protective cover prevents ink splashing during ink extraction. The adjustment component allows for easy adjustment of the ink thickness on the roller surface. The doctor blade assembly allows for easy adjustment of the relative position between the doctor blade assembly and the roller, facilitating the removal of excess ink from the roller surface. The adjustable doctor blade allows for easy adjustment of the gap between the doctor blade and the roller, controlling the ink flow and removing excess ink. The mounting groove allows for easy fixing of the adjustment component in the center of the protective cover. The probe abuts against the side of the fixing strip, allowing for easy measurement of the strip's displacement using a dial indicator. The measurement results can be magnified for a more accurate and intuitive display of the width of the gap between the doctor blade and the roller, thereby improving the efficiency of ink quantity adjustment and reducing ink and paper waste. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of an ink metering roller for a offset printing machine according to the present invention.

[0026] Figure 2 This is a three-dimensional structural diagram of the metering roller assembly of this utility model;

[0027] Figure 3 This is a three-dimensional structural diagram of the adjustment component of this utility model;

[0028] Figure 4 This is an exploded view of the adjusting component of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the scraper assembly of this utility model.

[0030] In the diagram: 1. Metering roller assembly; 11. Roller body; 12. Protective cover; 13. Connecting seat; 14. Connecting shaft; 15. Hexagonal groove; 16. Mounting groove; 17. Return groove; 2. Adjusting assembly; 21. Adjusting cavity; 22. Rotating seat; 23. Worm gear; 24. Threaded sleeve; 25. Worm; 26. Adjusting knob; 27. Dial indicator; 28. Probe; 3. Scraper assembly; 31. Fixing strip; 32. Adjusting scraper; 33. Threaded rod; 34. Sliding sleeve; 35. Guide groove. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1-5This utility model provides a technical solution: an ink metering roller for a offset printing press, including a metering roller assembly 1. The metering roller assembly 1 includes a roller body 11. The roller body 11 is designed to facilitate the quantitative extraction of ink from the ink fountain and the rotation of the roller body 11 to transfer the ink to subsequent ink rollers. A protective cover 12 is provided on one side of the roller body 11 to prevent ink splattering during ink extraction. An adjustment component 2 is provided in the middle of the protective cover 12 to adjust the ink thickness on the surface of the roller body 11. A doctor blade assembly 3 is fixedly installed inside the protective cover 12. The doctor blade assembly 3 allows the adjustment component 2 to adjust the relative position of the doctor blade assembly 3 and the roller body 11, facilitating the removal of excess ink from the surface of the roller body 11 by the doctor blade assembly 3, thereby achieving the function of adjusting the ink on the surface of the roller body 11. The doctor blade assembly 3 includes a fixing strip 31, and a fixing strip 31 is fixedly installed on the side facing the roller body 11. The adjustable doctor blade 32 allows for adjustment of the gap between the doctor blade 32 and the roller 11, thereby controlling the ink flow and removing excess ink. A mounting groove 16 is provided in the center of the protective cover 12, facilitating the fixed installation of the adjustment component 2. The adjustment component 2 includes an adjustment cavity 21, which is fixedly installed inside the mounting groove 16. A dial indicator 27 is fixedly installed on one side of the adjustment cavity 21, and a measuring head 28 is provided on one side of the dial indicator 27. The measuring head 28 is located inside the protective cover 12 and abuts against the side of the fixing strip 31. This abutment allows the dial indicator 27 to measure the displacement of the fixing strip 31 and amplify the measurement results, providing a more accurate and intuitive display of the width of the gap between the doctor blade 32 and the roller 11. This improves the efficiency of ink quantity adjustment and reduces ink and paper waste.

[0033] The fixing strip 31 has sliding sleeves 34 at both ends. The sliding sleeves 34 are fixedly installed on both ends of the inner side of the protective cover 12. The sliding sleeves 34 are fixedly installed on both ends of the inner side of the protective cover 12, which makes it easy to fix the scraper assembly 3 inside the protective cover 12.

[0034] The sliding sleeve 34 has a guide groove 35 on one side, which is slidably connected to the end of the fixing strip 31. A threaded rod 33 is fixedly installed in the middle of one side of the fixing strip 31. The guide groove 35 is designed to limit and guide the sliding of the fixing strip 31, so that the fixing strip 31 can only slide along the guide groove 35.

[0035] The roller body 11 has a connecting shaft 14 fixedly installed at both ends. A hexagonal groove 15 is provided on one side of the connecting shaft 14. The setting of the connecting shaft 14 and the hexagonal groove 15 facilitates the provision of a reliable transmission interface, ensures stable power transmission, and thus stably controls the rotation of the roller body 11.

[0036] The connecting shaft 14 is rotatably connected to a connecting seat 13 on the outside. One side of the connecting seat 13 is fixedly connected to the protective cover 12. The bottom of the protective cover 12 is provided with a return groove 17. The connection seat 13 and the return groove 17 make it easy to fix the device on the top of the ink fountain. The return groove 17 facilitates the guidance of excess ink scraped off by the adjusting doctor blade 32 back into the ink fountain.

[0037] The adjusting cavity 21 has a rotating seat 22 fixedly installed in the middle of its inner side. The rotating seat 22 is rotatably connected to a worm gear 23. The rotating seat 22 facilitates the rotatable connection of the worm gear 23 inside the adjusting cavity 21.

[0038] Among them, a threaded sleeve 24 is fixedly installed in the middle of the worm gear 23. The threaded sleeve 24 is threadedly connected to the threaded rod 33. The threaded connection between the threaded sleeve 24 and the threaded rod 33 facilitates the rotation of the worm gear 23 to adjust the position of the adjusting scraper 32.

[0039] The worm gear 23 is meshed with a worm 25, which is rotatably connected to the adjusting cavity 21. The worm 25 facilitates the rotation of the worm gear 23.

[0040] The worm gear 25 is fixedly mounted with an adjustment knob 26. The adjustment knob 26 is located on the top of the adjustment cavity 21. The adjustment knob 26 makes it easy to rotate to control the rotation of the worm gear 25, thereby fine-tuning the position of the adjustment scraper 32.

[0041] Specifically, the working principle of this type of ink metering roller for offset printing press is as follows: During use, the connecting seat 13 and the return groove 17 facilitate the fixed installation of the device on top of the ink fountain. The return groove 17 guides excess ink scraped off by the adjusting doctor blade 32 back into the ink fountain. The connecting shaft 14 and the hexagonal groove 15 provide a reliable transmission interface, ensuring stable power transmission and thus stable control of the roller body 11's rotation. The adjusting knob 26 allows for easy rotation of the worm gear 25, thereby fine-tuning the position of the adjusting doctor blade 32. The worm gear 25 drives the worm wheel 23 to rotate. The threaded sleeve 24 is threadedly connected to the threaded rod 33, allowing the worm wheel 23 to adjust the position of the adjusting doctor blade 32. The guide groove 35 limits and guides the sliding of the fixing strip 31, ensuring that the fixing strip 31 can only slide along the guide groove 35. The protective cover 12... The system is designed to prevent ink splattering during ink collection by the roller 11. The adjustment component 2 allows for easy adjustment of the ink thickness on the roller 11 surface. The doctor blade component 3 allows for adjustment of the relative position between the adjustment component 2 and the roller 11, facilitating the removal of excess ink from the roller 11 surface. The doctor blade 32 allows for adjustment of the gap between itself and the roller 11, controlling the ink flow and removing excess ink. The mounting groove 16 allows for the fixed installation of the adjustment component 2 in the center of the protective cover 12. The probe 28 abuts against the side of the fixing strip 31, allowing the dial indicator 27 to measure the displacement of the fixing strip 31 and amplify the measurement results for a more accurate and intuitive display of the width of the gap between the doctor blade 32 and the roller 11. This improves the efficiency of ink volume adjustment and reduces ink and paper waste.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ink metering roller for a offset printing press, characterized in that, The device includes a metering roller assembly (1), which includes a roller body (11). A protective cover (12) is provided on one side of the roller body (11). An adjustment component (2) is provided in the middle of the protective cover (12). A scraper assembly (3) is fixedly installed inside the protective cover (12). The scraper assembly (3) includes a fixing strip (31). An adjustment scraper (32) is fixedly installed on the side of the fixing strip (31) facing the roller body (11). An installation groove (16) is provided in the middle of the protective cover (12). The adjustment component (2) includes an adjustment cavity (21). The adjustment cavity (21) is fixedly installed inside the installation groove (16). A dial indicator (27) is fixedly installed on one side of the adjustment cavity (21). A probe (28) is provided on one side of the dial indicator (27). The probe (28) is located inside the protective cover (12) and abuts against the side of the fixing strip (31).

2. The ink metering roller for a offset printing press according to claim 1, characterized in that, The fixing strip (31) has sliding sleeves (34) at both ends, and the sliding sleeves (34) are fixedly installed on both ends of the inner side of the protective cover (12).

3. The ink metering roller for a offset printing press according to claim 2, characterized in that, The sliding sleeve (34) has a guide groove (35) on one side, and the guide groove (35) is slidably connected to the end of the fixing strip (31). A threaded rod (33) is fixedly installed in the middle of one side of the fixing strip (31).

4. The ink metering roller for a offset printing press according to claim 1, characterized in that, The roller body (11) has a connecting shaft (14) fixedly installed at both ends, and a hexagonal groove (15) is provided on one side of the connecting shaft (14).

5. The ink metering roller for a offset printing press according to claim 4, characterized in that, The connecting shaft (14) is rotatably connected to a connecting seat (13) on the outside. One side of the connecting seat (13) is fixedly connected to the protective cover (12). The bottom of the protective cover (12) is provided with a return groove (17).

6. The ink metering roller for a offset printing press according to claim 1, characterized in that, A rotating seat (22) is fixedly installed in the middle of the inner side of the adjustment cavity (21), and a worm gear (23) is rotatably connected inside the rotating seat (22).

7. The ink metering roller for a offset printing press according to claim 6, characterized in that, A threaded sleeve (24) is fixedly installed in the middle of the worm gear (23), and the threaded sleeve (24) is threadedly connected to the threaded rod (33).

8. The ink metering roller for a offset printing press according to claim 7, characterized in that, The worm gear (23) is meshed with a worm (25), and the worm (25) is rotatably connected to the adjusting cavity (21).

9. An ink metering roller for a offset printing press according to claim 8, characterized in that, An adjustment knob (26) is fixedly installed on the top of the worm gear (25), and the adjustment knob (26) is located on the top of the adjustment cavity (21).

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