Structure capable of switching gravure printing and flexographic printing

Abstract

The utility model provides a structure capable of switching gravure and flexography, which comprises a plate roller assembly, the plate roller assembly comprises a first support, a plate roller shaft, a first limit seat, a second limit seat, a plate roller and a limit device, and the plate roller shaft is rotatably connected with the first support; the first limiting seat is arranged on the printing roller shaft in a sleeving manner; the second limiting seat is arranged on the printing roller shaft in a sleeving manner; the plate roller cylinder is arranged on the plate roller shaft in a sleeving manner and is positioned between the first limiting seat and the second limiting seat; the limiting device is arranged on the second limiting seat and is detachably connected with the first bracket; and the limiting device and the second limiting seat are sequentially taken down or simultaneously taken down so as to replace the plate roller. According to the structure, the first limiting seat and the second limiting seat are arranged for limiting the plate roller, meanwhile, the limiting device is used for limiting, when the plate roller needs to be replaced, the second limiting seat is taken down from the limiting device, and replacement of the gravure plate roller and the flexographic plate roller is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of printing equipment, and in particular to a structure that can switch between gravure and flexographic printing. Background Technology

[0002] Gravure printing and flexographic printing are two different printing methods, each with its own advantages and disadvantages, and each suitable for its own printing fields. Currently, printing presses, whether gravure or flexographic, are only for a single printing method, either flexographic or gravure printing. Therefore, depending on the needs, different printing presses must be used, requiring the purchase of both gravure and flexographic printing presses, which greatly increases costs and floor space requirements.

[0003] In view of this, the inventors specifically designed a structure that can switch between gravure and flexographic printing, which led to this invention. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to propose a structure that allows switching between gravure and flexographic printing on the same printing press base. This is achieved by setting a first limiting seat and a second limiting seat to restrict the printing plate roller, while simultaneously using a limiting device for positioning. When it is necessary to change the printing plate roller, the second limiting seat can be removed from the limiting device, thus realizing the replacement of the gravure printing roller and the flexographic printing roller, overcoming the shortcomings of current printing presses that only support a single printing method.

[0005] According to the present invention, a switchable gravure and flexographic printing structure includes a printing roller assembly, the printing roller assembly comprising:

[0006] First support;

[0007] A printing roller shaft, which is rotatably connected to the first bracket;

[0008] A first limiting seat is sleeved on the printing roller shaft;

[0009] The second limiting seat is sleeved on the printing roller shaft;

[0010] A printing roller, which is sleeved on the printing roller shaft and located between the first limiting seat and the second limiting seat;

[0011] A limiting device is provided on a second limiting seat and is detachably connected to the first bracket;

[0012] The limiting device and the second limiting seat can be removed sequentially or simultaneously to replace the printing roller.

[0013] The structure of this utility model uses a first limiting seat and a second limiting seat to restrict the printing plate roller, and a limiting device to limit the position. When the printing plate roller needs to be replaced, the second limiting seat can be removed from the limiting device, thus realizing the replacement of gravure printing plate roller and flexographic printing plate roller. This avoids the need to purchase printing machines with different plate types, reduces costs, and also reduces the floor space required.

[0014] In some embodiments of this utility model, the printing roller is a gravure printing roller or a flexographic printing roller.

[0015] In some embodiments of this utility model, the first support includes a first base plate and two first upright plates disposed on the first base plate and arranged side by side.

[0016] In some embodiments of this utility model, a first driving device is provided on the first bracket and on the side away from the limiting device.

[0017] In some embodiments of this utility model, the two first upright plates and the first base plate are U-shaped as a whole. The first driving device is disposed on the outside of one of the first upright plates and is used to drive the plate roller shaft to rotate and drive the plate roller to rotate. The limiting device is disposed on the other first upright plate and is detachably connected to the first upright plate.

[0018] In some embodiments of this utility model, a printing roller gear is also provided on one end face of the printing roller, and an avoidance hole is provided on the inner side of the printing roller gear. The inner diameter of the avoidance hole is greater than the maximum outer diameter of the first limiting seat.

[0019] In some embodiments of this utility model, the limiting device includes:

[0020] The first flange is embedded in the first bracket;

[0021] The second flange is disposed on the first flange;

[0022] The first bearing is sleeved on the second limiting seat and located inside the second flange.

[0023] In some embodiments of this utility model, a pressure roller closing mechanism located above the printing roller assembly is also included, the pressure roller closing mechanism comprising:

[0024] Support plate;

[0025] The second bracket is located below the support plate and can move along the vertical direction;

[0026] The second driving device is disposed on the support plate and is used to drive the second bracket to move in the vertical direction;

[0027] A rubber roller shaft is mounted on the second bracket and its two ends are detachably connected to the second bracket.

[0028] The matching roller is mounted on the rubber roller shaft and is used in conjunction with the printing plate roller.

[0029] In some embodiments of this utility model, the second bracket is provided with a groove for placing the rubber roller shaft, and the opening of the groove is provided with a fixing seat for confining the rubber roller shaft within the groove.

[0030] In some embodiments of this utility model, the groove is U-shaped and the opening faces the side wall of the second bracket.

[0031] In some embodiments of this utility model, one end of the fixed base is rotatably connected to the second bracket, and the other end is detachably connected to the second bracket.

[0032] In some embodiments of this utility model, the printing roller is a gravure printing roller or a flexographic printing roller, and the corresponding matching roller is a gravure printing embossing roller or a metal printing roller.

[0033] In some embodiments of this utility model, it further includes:

[0034] Lower wall panel assembly;

[0035] A doctor blade assembly, which is disposed on the lower wall plate assembly and arranged side by side with the pressure roller mechanism; or a flexographic printing unit assembly, which is disposed on the lower wall plate assembly and arranged side by side with the printing roller assembly.

[0036] The printing roller assembly and the pressure roller closing mechanism are both mounted on the lower wall panel assembly. Attached Figure Description

[0037] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0038] in:

[0039] Figure 1 This is a schematic diagram of the structure of the printing roller assembly of this utility model;

[0040] Figure 2 This is an exploded view of the printing roller assembly of this utility model. Figure 1 ;

[0041] Figure 3 This is an exploded view of the printing roller assembly of this utility model. Figure 2 ;

[0042] Figure 4 This is a side view of the printing roller assembly of this utility model;

[0043] Figure 5 This utility model Figure 4 Sectional view AA;

[0044] Figure 6 This utility model Figure 5 A magnified view of a portion of the image;

[0045] Figure 7 This is a schematic diagram of the structure of the pressure roller mechanism of this utility model;

[0046] Figure 8 This is a side view of the pressure roller mechanism of this utility model;

[0047] Figure 9 This utility model Figure 8 BB (sectional view);

[0048] Figure 10 This is a schematic diagram of the structure of this utility model that allows switching between gravure and flexographic printing. Figure 1 ;

[0049] Figure 11 This is a schematic diagram of the structure of this utility model that allows switching between gravure and flexographic printing. Figure 2 .

[0050] Description of labels:

[0051] 10. Lower wall panel assembly; 20. Printing roller assembly; 21. First support; 211. First base plate; 212. First upright plate; 2121. Support column; 2122. First fixing component; 22. Printing roller shaft; 23. First limiting seat; 24. Second limiting seat; 25. Printing roller cylinder; 251. Printing roller gear; 26. Limiting device; 261. First flange; 2611. First handle; 262. Second flange; 263. First bearing; 264. Guide cover; 27. First drive device; 28. Transition cone sleeve; 30. Press roller closing mechanism; 31. Support plate; 32. Second support; 321. Groove; 33. Second drive device; 34. Glue roller shaft; 35. Matching roller; 36. Fixing seat; 37. Second bearing; 38. Limiting ring; 40. Squeegee assembly; 50. Flexographic printing unit assembly. Detailed Implementation

[0052] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0053] Please see Figures 1 to 11This is a switchable gravure and flexographic printing structure as an embodiment 1 of the present invention. The structure includes a printing roller assembly 20, which includes a first support 21, a printing roller shaft 22, a first limiting seat 23, a second limiting seat 24, a printing roller cylinder 25, and a limiting device 26. The printing roller shaft 22 is rotatably connected to the first support 21. The first limiting seat 23 is sleeved on the printing roller shaft 22. The second limiting seat 24 is sleeved on the printing roller shaft 22. The printing roller cylinder 25 is sleeved on the printing roller shaft 22 and is located between the first limiting seat 23 and the second limiting seat 24. The limiting device 26 is disposed on the second limiting seat 24 and is detachably connected to the first support 21. The limiting device 26 and the second limiting seat 24 can be removed sequentially or simultaneously to replace the printing roller cylinder 25. The printing roller cylinder 25 is a gravure printing roller or a flexographic printing roller. The structure of this utility model uses a first limiting seat 23 and a second limiting seat 24 to limit the printing plate roller 25, and a limiting device 26 for limiting. When the printing plate roller 25 needs to be replaced, the second limiting seat 24 can be removed from the limiting device 26, thus realizing the replacement of gravure printing plate roller and flexographic printing plate roller.

[0054] Please refer to the following for details: Figure 10-11 The structure of this utility model also includes a pressure roller mechanism located above the printing roller assembly 20. The pressure roller mechanism includes a support plate 31, a second bracket 32, a second driving device 33, a rubber roller shaft 34, and a mating roller 35. The second bracket 32 ​​is disposed below the support plate 31 and can move in the vertical direction. The second driving device 33 is disposed on the support plate 31 and is used to drive the second bracket 32 ​​to move in the vertical direction. The rubber roller shaft 34 is disposed on the second bracket 32 ​​and its two ends are detachably connected to the second bracket 32. The mating roller 35 is disposed on the rubber roller shaft 34 and is used to cooperate with the printing roller 25. The printing roller 25 is a gravure printing roller or a flexographic printing roller, and the corresponding mating roller 35 is a gravure printing pressure roller or a metal printing roller. The structure also includes a lower wall panel assembly 10, a doctor blade assembly 40, or a flexographic printing unit assembly 50 (wherein, the flexographic printing unit assembly 50 includes a flexographic printing unit doctor blade group and anilox roller group). The doctor blade assembly 40 is disposed on the lower wall panel assembly and arranged side by side with the pressure roller mechanism 30. The flexographic printing unit assembly 50 is disposed on the lower wall panel assembly and arranged side by side with the plate roller assembly 20. The plate roller assembly 20 and the pressure roller mechanism are both disposed on the lower wall panel assembly 10. When gravure printing is required, the plate roller 25 is replaced with a gravure plate roller, the mating roller 35 is replaced with a gravure impression roller, and the doctor blade assembly 40 is installed in the designated position. When flexographic printing is required, the plate roller 25 is replaced with a flexographic plate roller, the mating roller 35 is replaced with a metal printing roller, and the flexographic printing unit assembly 50 is installed in the designated position.

[0055] Please refer to the following for details: Figure 1The first support 21 includes a first base plate 211 and two first upright plates 212 arranged side by side on the first base plate 211. A first driving device 27 is arranged on the side of the first support 21 away from the limiting device 26. The two first upright plates 212 and the first base plate 211 are U-shaped as a whole. The first driving device 27 is arranged on the outside of one of the first upright plates 212 and is used to drive the printing roller shaft 22 to rotate, thereby driving the printing roller 25 to rotate. The limiting device 26 is arranged on the other first upright plate 212 and is detachably connected to the first upright plate 212.

[0056] Please refer to the following for details: Figure 1-3 In this invention, the first limiting seat 23 is directly mounted on the printing roller shaft 22, and the two are relatively fixed (i.e., when the printing roller shaft 22 rotates, the first limiting seat 23 rotates together). Specifically, the first limiting seat 23 can be connected to the printing roller shaft 22 by keyway and key teeth. The first limiting seat 23 is shaped like a frustum and can restrict the movement of the printing roller 25 along the central axis of the printing roller shaft 22. The printing roller 25 and the first limiting seat 23 are also relatively fixed and connected by keyway and key teeth. Specifically, the inner side of the end of the printing roller 25 connected to the first limiting seat 23 is provided with a shape that mates with the first limiting seat 23, and key teeth can be embedded on the outer wall of the first limiting seat 23. The inner side of the printing roller 25 is provided with keyways that mate with the key teeth. The printing roller shaft 22 is also fitted with a transition cone sleeve. The transition cone sleeve 28 is arranged side by side with the first limiting seat 23 and is fixed relative to the printing roller shaft 22. Specifically, it can be connected to the transition cone sleeve 28 by bolts. After the bolts are tightened, they directly abut against the outer wall of the printing roller shaft 22 to fix or limit the transition cone sleeve 28.

[0057] Please refer to the following for details: Figure 2 The printing roller 25 is also provided with a printing roller gear 251 on one end face. The printing roller gear 251 is provided with a clearance hole on the inner side. The inner diameter of the clearance hole is greater than the maximum outer diameter of the first limit seat 23.

[0058] The limiting device 26 includes a first flange 261, a second flange 262, and a first bearing 263. The first flange 261 is embedded in the first bracket 21; the second flange 262 is disposed on the first flange 261; the first bearing 263 is sleeved on the second limiting seat 24 and located inside the second flange 262; the first bearing 263 is sleeved on the second limiting seat 24 and is restricted on the second limiting seat 24 by a C-shaped first retaining ring; guide covers 264 are also sleeved on both ends of the first bearing 263 and are all located inside the second flange 262, that is, one guide cover 264, the first bearing 263, and the other guide cover 264 are located side by side inside the second flange 262 and then restricted inside the second flange 262 by a second retaining ring; the second flange 262 is fixed to the first flange 261 by several bolts. Therefore, removing the first flange 261 will cause the second flange 262 and the second limiting seat 24 to disengage from the printing roller shaft 22. A clearance hole needs to be provided on the first upright plate 212 near the second limiting seat 24 to facilitate operations such as adding ink to the ink cartridge or changing the ink cartridge. Therefore, a clearance groove also needs to be provided on the first flange 261. The first upright plate 212 also has a mounting position for fitting the first flange 261. To improve the stability of the support, two support columns 2121 are provided on the first upright plate 212 with clearance holes to support the first flange 261. Then, it is quickly locked and disassembled by N first fasteners 2122. Specifically, the first fasteners 2122 are L-shaped when viewed from the side. The bolts are tightened onto the first bracket 21. When the limiting device 26 needs to be installed, the bolts are loosened, and the first fixing member 2122 is rotated to avoid dryness during the installation of the limiting device 26. After the limiting device 26 is installed in place, the first fixing member 2122 is rotated so that it partially abuts against the end face of the first flange 261, and then the bolts are tightened. This achieves quick locking and disassembly. The number N can be set as needed; in this embodiment, two are sufficient. Through the support column 2121 and the first fixing member 2122, the limiting device 26 can be quickly and stably restricted onto the first bracket 21. To further improve the stability after installation, the second limiting seat 24 is sleeved on one end of the printing roller shaft 22, and then further fixed from the end of the second limiting seat 24 with bolts. The bolts pass directly through the first flange 261, the second flange 262, and the second limiting seat 24, and are threadedly connected to the end of the printing roller shaft 22. Two first handles 2611 are also provided on the outer end face of the first flange 261 to facilitate the removal of the limiting device 26.

[0059] Please refer to the following for details: Figures 7-9This utility model also includes a pressure roller mechanism 30 located above the printing roller assembly 20. The pressure roller mechanism 30 includes a support plate 31, a second bracket 32, a second drive device 33, a rubber roller shaft 34, and a mating roller 35. The second bracket 32 ​​is disposed below the support plate 31 and can move vertically. The second drive device 33 is disposed on the support plate 31 and is used to drive the second bracket 32 ​​to move vertically. The motor used by the second drive device 33 can be a high-precision motor. It drives the mating roller 35 up and down vertically. The rubber roller shaft 34 is disposed on the second bracket 32 ​​and its two ends are detachably connected to the second bracket 32. The mating roller 35 is disposed on the rubber roller shaft 34 and is used to cooperate with the printing roller 25. Specifically, the printing roller 25 is a gravure printing roller or a flexographic printing roller, and the corresponding mating roller 35 is a gravure printing rubber roller or a metal printing roller. The second drive device 33 drives the second bracket 32 ​​to move vertically closer to or away from the printing roller assembly 20. The second drive device 33 can be in two sets, including a drive motor with its output end facing the second bracket 32, a lead screw disposed at the output end of the drive motor, and a lead screw sleeve disposed on the second bracket 32 ​​and cooperating with the lead screw. The drive motor drives the lead screw to rotate, thereby causing the lead screw sleeve to move along the direction of the lead screw's central axis. Since the lead screw sleeve is fixed on the second bracket 32, it also drives the second bracket 32 ​​to move. To ensure smooth and stable up-and-down movement, slide rails can be provided on both sides of the second bracket 32, and sliders that cooperate with the slide rails can be provided on the lower wall plate assembly 10. The sliders can be slidably connected to the slide rails.

[0060] The second bracket 32 ​​is provided with a groove 321 for placing the rubber roller shaft 34. A fixing seat 36 is provided at the opening of the groove 321 to confine the rubber roller shaft 34 within the groove 321. The groove 321 is U-shaped, with its opening facing the side of the second bracket 32. One end of the fixing seat 36 is rotatably connected to the second bracket 32, and the other end is detachably connected to the second bracket 32. Specifically, the detachable end of the fixing seat 36 is bolted to the second bracket 32. Loosening the bolt allows the fixing seat 36 to rotate, enabling the rubber roller shaft 34 with the mating roller 35 to be removed from the second bracket 32. In this invention, to prevent the rubber roller shaft 34 from rotating, the fixing seat 36 is also provided with threaded holes. After being threadedly connected to the fixing seat 36 by bolts, it abuts against the outer wall of the rubber roller shaft 34 to prevent the rubber roller shaft 34 from rotating with the second bracket 32. Two second bearings 37 are provided on the rubber roller shaft 34 and are located at both ends of the mating roller 35. The mating roller 35 is sleeved on the two second bearings 37 to facilitate the smooth rotation of the mating roller 35. Specifically, the two second bearings 37 are first embedded at both ends of the mating roller 35, and then sleeved on the rubber roller shaft 34. The two ends of the mating roller 35 with the second bearings 37 are limited by the limiting rings 38. The limiting rings 38 are directly sleeved on the rubber roller shaft 34 and locked by bolts.

[0061] In existing gravure and flexographic printing, most printing rollers 25 (gravure or flexographic printing rollers) are installed inside the lower plate wall assembly, making them inconvenient to replace. The focus of this invention is to improve the structure of the printing roller 25, which is difficult to replace, so that the printing roller 25 can be disassembled, replaced, and installed from the side of the whole. The mating roller 35 (gravure impression roller or metal printing roller) used with the printing roller 25 is also inconvenient to replace because it is in a higher position. Therefore, a groove 321 is set to cooperate with the fixing seat 36 to achieve quick replacement of the mating roller 35. The ink cartridge can be moved aside on the first bracket 21 to facilitate replacement from the side. Since the metal doctor blade of gravure printing and the anilox roller assembly of flexographic printing are in a lower position and there is enough space for replacement, they can be modularized and replaced conveniently by a few bolts and positioning posts.

[0062] In summary, the structure of this utility model uses a first limiting seat and a second limiting seat to restrict the printing plate roller, and a limiting device for positioning. When the printing plate roller needs to be replaced, the second limiting seat can be removed from the limiting device, thus realizing the replacement of gravure printing plate roller and flexographic printing plate roller. This avoids the need to purchase printing presses with different plate types, reduces costs, and also reduces the floor space required.

[0063] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A structure that can switch between gravure and flexographic printing, characterized in that, Includes a printing roller assembly, the printing roller assembly comprising: First support; A printing roller shaft, which is rotatably connected to the first bracket; A first limiting seat is sleeved on the printing roller shaft; The second limiting seat is sleeved on the printing roller shaft; A printing roller, which is sleeved on the printing roller shaft and located between the first limiting seat and the second limiting seat; A limiting device is provided on a second limiting seat and is detachably connected to the first bracket; The limiting device and the second limiting seat can be removed sequentially or simultaneously to replace the printing roller.

2. The structure for switchable gravure and flexographic printing according to claim 1, characterized in that, The first support includes a first base plate and two first upright plates disposed on the first base plate and arranged side by side.

3. The structure for switching between gravure and flexographic printing according to claim 1, characterized in that, A first driving device is provided on the first bracket on the side away from the limiting device.

4. The structure for switchable gravure and flexographic printing according to claim 1, characterized in that, The printing roller is also provided with a printing roller gear on one end face, and an avoidance hole is provided on the inner side of the printing roller gear. The inner diameter of the avoidance hole is greater than the maximum outer diameter of the first limiting seat.

5. The structure for switchable gravure and flexographic printing according to claim 1, characterized in that, The limiting device includes: The first flange is embedded in the first bracket; The second flange is disposed on the first flange; The first bearing is sleeved on the second limiting seat and located inside the second flange.

6. The structure for switchable gravure and flexographic printing according to claim 1, characterized in that, It also includes a pressure roller closing mechanism located above the printing roller assembly, the pressure roller closing mechanism comprising: Support plate; The second bracket is located below the support plate and can move along the vertical direction; The second driving device is disposed on the support plate and is used to drive the second bracket to move in the vertical direction; A rubber roller shaft is mounted on the second bracket and its two ends are detachably connected to the second bracket. The matching roller is mounted on the rubber roller shaft and is used in conjunction with the printing plate roller.

7. The structure for switchable gravure and flexographic printing according to claim 6, characterized in that, The second bracket is provided with a groove for placing the rubber roller shaft, and the opening of the groove is provided with a fixing seat for confining the rubber roller shaft within the groove.

8. The structure for switchable gravure and flexographic printing according to claim 7, characterized in that, One end of the fixed base is rotatably connected to the second bracket, and the other end is detachably connected to the second bracket.

9. The structure for switchable gravure and flexographic printing according to claim 7, characterized in that, The printing roller is a gravure printing roller or a flexographic printing roller, and the corresponding matching roller is a gravure printing embossing roller or a metal printing roller.

10. The structure for switchable gravure and flexographic printing according to claim 6, characterized in that, Also includes: Lower wall panel assembly; A doctor blade assembly, which is disposed on the lower wall plate assembly and arranged side by side with the pressure roller mechanism; or a flexographic printing unit assembly, which is disposed on the lower wall plate assembly and arranged side by side with the printing roller assembly. The printing roller assembly and the pressure roller closing mechanism are both mounted on the lower wall panel assembly.

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