Scraper pressure adjusting mechanism of photogravure press

Abstract

The utility model provides a scraper pressure adjusting mechanism of a photogravure press. Relates to the technical field of printer scraper assemblies. The scraper pressure adjusting mechanism of the photogravure press comprises a supporting main frame, the same linkage pressing plate is installed on the two sides of the supporting main frame in a sliding mode, a rectangular frame is fixedly installed at the bottom of the linkage pressing plate, a mounting plate is arranged in the rectangular frame, a scraper blade is arranged below the mounting plate, and the scraper blade is arranged below the mounting plate. The scraper blade penetrates through the bottom of the rectangular frame and is movably connected with the bottom of the rectangular frame, a fixing frame is fixedly installed on the top of the installation plate, two pressure springs are fixedly installed on the top of the fixing frame, and the top ends of the two pressure springs are fixedly connected with the inner wall of the top of the rectangular frame. The pressure between the scraper and the printing plate can be flexibly adjusted according to actual requirements, and the adjusting mode is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing machine doctor blade subassembly technical field especially relates to a doctor blade pressure adjusting mechanism of gravure printing machine. BACKGROUND

[0002] The gravure printing machine is a kind of equipment using gravure printing technology, and its core feature is that the text part of the printing plate is recessed, and the blank part is in the same plane with the outer circle of the printing plate cylinder, the common gravure printing machine on the market usually includes doctor blade, and the doctor blade is the key component for accurately controlling ink transfer in the printing process, and its core function is to remove ink in the blank area of the printing plate cylinder to ensure that only the recessed text part retains ink to realize accurate printing, and in the use process of doctor blade, its height, pressure and the like need to be adjusted according to actual requirements, so that printing can be smoothly carried out.

[0003] For example, the patent document with the authorized announcement number CN219856377U proposes a doctor blade adjusting mechanism for gravure printing machine, which solves the problem that the existing doctor blade of gravure printing machine is complex to adjust when ink removal blade is adjusted after changing printing plate, and it is laborious and time-consuming, which affects production efficiency.

[0004] However, it is found that the common doctor blade not only adjusts the height of doctor blade as proposed in the above technology, but also adjusts the pressure between doctor blade and printing plate, because the doctor blade is usually fixed at a specified position, and the pressure between the doctor blade and the printing plate is mostly a fixed value, which is difficult to adjust adaptively, when the pressure between the doctor blade and the printing plate is too large, it will cause the ink transfer rate to decrease and the printing plate to wear out, and when the pressure is too small, it is easy to cause dirty plate, doctor blade line or ink residue.

[0005] Therefore, it is necessary to provide a new doctor blade pressure adjusting mechanism for gravure printing machine to solve the above technical problems. CONTENT OF UTILITY MODEL

[0006] The utility model aims at providing a doctor blade pressure adjusting mechanism for gravure printing machine, which can flexibly adjust the pressure between doctor blade and printing plate according to actual requirements, and the adjusting method is convenient.

[0007] To solve the above-mentioned technical problems, the squeegee pressure adjustment mechanism of the gravure printing machine provided by this utility model includes: a supporting main frame, on both sides of the supporting main frame a common linkage pressure plate is slidably installed, a rectangular frame is fixedly installed at the bottom of the linkage pressure plate, an installation plate is provided inside the rectangular frame, a squeegee blade is provided below the installation plate, the squeegee blade passes through the bottom of the rectangular frame and is movably connected to the bottom of the rectangular frame, a fixing frame is fixedly installed at the top of the installation plate, two pressure springs are fixedly installed at the top of the fixing frame, the top ends of the two pressure springs are fixedly connected to the top inner wall of the rectangular frame, a supporting secondary frame is fixedly installed at the top of the supporting main frame, a connecting column is slidably installed at the top of the supporting main frame, the bottom end of the connecting column is fixedly connected to the linkage pressure plate, and its top end extends into the supporting secondary frame and is fixedly installed with a cone head, a double-ended lead screw is rotatably installed inside the supporting secondary frame, two connecting strips are threaded on the double-ended lead screw, and a pusher strip is fixedly installed on the side of the two connecting strips that are close to each other, and the two pusher strips are adapted to the cone head.

[0008] Preferably, two guide slides are fixedly installed inside the rectangular frame, and both guide slides penetrate the mounting plate and are slidably connected to the mounting plate.

[0009] Preferably, a boss is fixedly installed on one side of the outer wall of the support sub-frame, and a set screw is threaded onto the boss, with the bottom end of the set screw abutting against the double-ended lead screw.

[0010] Preferably, each of the two push bars has a beveled edge on the side that is close to each other, and both beveled edges are fitted and adapted to the outer wall of the cone.

[0011] Preferably, both sides of the main support frame are provided with long slide rails, the linkage pressure plate passes through the two long slide rails, and uprights are fixedly installed in the two long slide rails. The two uprights pass through the linkage pressure plate and are slidably connected to the linkage pressure plate.

[0012] Preferably, two engaging slots are provided on one side of the mounting plate, and a fastening block is inserted into each of the two engaging slots. The bottom of each of the two fastening blocks is fixedly connected to the scraper blade.

[0013] Preferably, each of the two fastening blocks has a vertical recessed hole at its top, a threaded rod is rotatably mounted on the top of the fixing frame, the bottom end of the threaded rod is rotatably connected to the mounting plate, a linkage plate is threadedly mounted on the threaded rod, and two vertical inserts are fixedly mounted on the bottom of the linkage plate. The bottom ends of the two vertical inserts extend into the two vertical recessed holes respectively, and both vertical inserts are slidably connected to the mounting plate.

[0014] Compared with related technologies, the doctor blade pressure adjustment mechanism of the gravure printing machine provided by this utility model has the following beneficial effects:

[0015] This utility model provides a doctor blade pressure adjustment mechanism for a gravure printing machine. Through the abutting and adapting relationship between the set push bar and the cone head, the rectangular frame can be driven to rise or fall by rotating the double-ended screw, thereby forming a downward squeezing force on the pressure spring. This allows for adaptive and flexible adjustment of the pressure between the doctor blade and the printing plate, providing good protection for both the doctor blade and the printing plate. Furthermore, the severely worn doctor blade can be quickly replaced by rotating the threaded rod, facilitating daily printing use. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the doctor blade pressure adjustment mechanism for a gravure printing machine provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the linkage pressure plate and the connecting column in this utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the mounting plate and scraper blade in this utility model;

[0019] Figure 4 This is a schematic diagram of the card slot in this utility model;

[0020] Figure 5 This is a schematic diagram of the vertical insertion hole in this utility model.

[0021] The following are the labels in the diagram: 1. Main support frame; 2. Linkage pressure plate; 3. Rectangular frame; 4. Guide slide column; 5. Mounting plate; 6. Scraper blade; 7. Fixing frame; 8. Pressure spring; 9. Connecting column; 10. Conical head; 11. Sub-support frame; 12. Double-ended lead screw; 13. Connecting strip; 14. Pushing strip; 15. Engaging groove; 16. Fastening block; 17. Vertical insert hole; 18. Threaded rod; 19. Linkage plate; 20. Vertical insert head. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1-5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the doctor blade pressure adjustment mechanism for a gravure printing machine provided by this utility model; Figure 2 This is a schematic diagram of the connection structure between the linkage pressure plate and the connecting column in this utility model; Figure 3 This is a schematic diagram of the assembly structure of the mounting plate and scraper blade in this utility model; Figure 4This is a schematic diagram of the card slot in this utility model; Figure 5 This is a schematic diagram of the vertical embedding hole in this utility model. The doctor blade pressure adjustment mechanism of the gravure printing machine includes: a supporting main frame 1, with the same linkage pressure plate 2 slidably installed on both sides of the supporting main frame 1; a rectangular frame 3 fixedly installed at the bottom of the linkage pressure plate 2; a mounting plate 5 provided inside the rectangular frame 3; a doctor blade 6 provided below the mounting plate 5; the doctor blade 6 passing through the bottom of the rectangular frame 3 and movably connected to the bottom of the rectangular frame 3; a fixing frame 7 fixedly installed at the top of the mounting plate 5; and two pressure springs 8 fixedly installed at the top of the fixing frame 7. The top ends of the two pressure springs 8 are fixedly connected to the inner wall of the top of the rectangular frame 3. The pressure springs 8 can provide a downward pressure to the doctor blade 6, thereby adjusting the pressure between it and the printing plate. A secondary support frame 11 is fixedly installed on the top of the main support frame 1. A connecting column 9 is slidably installed on the top of the main support frame 1, with its bottom end fixedly connected to the linkage pressure plate 2. Its top end extends into the secondary support frame 11 and is fixedly installed with a cone head 10. A double-ended screw 12 is rotatably installed inside the secondary support frame 11, with two connecting bars 13 threaded on it. Push bars 14 are fixedly installed on the side of the two connecting bars 13 that are close to each other, and both push bars 14 have beveled edges on the side that are close to each other. Both beveled edges fit and adapt to the outer wall of the cone head 10. Guide rods are fixedly installed on the inner walls of both sides of the secondary support frame 11. The two guide rods pass through the two connecting bars 13 respectively and are slidably connected to the corresponding connecting bars 13.

[0024] In the above method, in order to enable the mounting plate 5 to move linearly, two guide slides 4 are fixedly installed inside the rectangular frame 3. Both guide slides 4 pass through the mounting plate 5 and are slidably connected to the mounting plate 5.

[0025] In this method, in order to prevent the double-ended lead screw 12 from rotating in its natural state, a boss is fixedly installed on one side of the outer wall of the support sub-frame 11, and a set screw is threaded on it. The bottom end of the set screw abuts against the double-ended lead screw 12, thereby forming an external force that restricts the double-ended lead screw 12.

[0026] In this method, in order to ensure that the linkage pressure plate 2 can only slide in a linear vertical direction, long slide rails are provided on both sides of the main support frame 1. The linkage pressure plate 2 passes through the two long slide rails, and uprights are fixedly installed in the two long slide rails. The two uprights pass through the linkage pressure plate 2 and are slidably connected to the linkage pressure plate 2.

[0027] In this method, when the scraper blade 6 becomes severely worn and needs to be replaced, two engaging grooves 15 are provided on one side of the mounting plate 5 for easy replacement. Each engaging groove 15 contains a snap-fit ​​block 16, the bottom of which is fixedly connected to the scraper blade 6. Furthermore, each snap-fit ​​block 16 has a vertical recess 17 at its top. A threaded rod 18 is rotatably mounted on the top of the mounting bracket 7, its bottom end rotatably connected to the mounting plate 5. A linkage plate 19 is threaded onto the threaded rod 18, and two vertical inserts 20 are fixedly mounted at the bottom of the linkage plate 19. The bottom ends of the two vertical inserts 20 extend into the two vertical recesses 17, and both vertical inserts 20 are slidably connected to the mounting plate 5. Additionally, two limiting rods are fixed on the top of the mounting plate 5, their top ends fixed to the inner top wall of the mounting bracket 7, and both limiting rods penetrate the linkage plate 19 and are slidably connected to it.

[0028] The working principle of the doctor blade pressure adjustment mechanism of the gravure printing machine provided by this utility model is as follows:

[0029] When using this device, the main support frame 1 is directly fixed at the designated position on the printing press, and the bottom of the doctor blade 6 is in contact with the top of the printing plate.

[0030] When the printing press is in normal use, the doctor blade 6 can scrape off the ink from the non-image areas on the surface of the printing cylinder;

[0031] When it is necessary to adjust the pressure of the doctor blade 6 to increase the contact force between it and the printing plate, first screw the set screw to separate it from the double-ended screw 12, and then directly rotate the double-ended screw 12 clockwise. The two connecting bars 13 will move closer to each other. At this time, the inclined edge of the push bar 14 will contact the outer wall of the cone head 10, and the two will generate a squeezing force. The cone head 10 will descend with the connecting column 9, and then it can also descend with the linkage pressure plate 2 and the rectangular frame 3. During the descent, the doctor blade 6 will always be in contact with the printing plate. At this time, the two pressure springs 8 will be compressed, which can generate a downward pushing force on the mounting plate 5 and the doctor blade 6, thereby increasing the pressure between the doctor blade 6 and the printing plate. Once the pressure is adjusted to a suitable range, stop rotating the double-ended screw 12.

[0032] In subsequent use, when the scraper blade 6 needs to be replaced due to wear of the blade edge after long-term use, simply rotate the threaded rod 18 counterclockwise. The linkage plate 19 will lift the two vertical inserts 20, eventually bringing the two vertical inserts 20 out of the corresponding vertical insert holes 17. Then, directly pull out the scraper blade 6 along with the fastening block 16, take out the new scraper blade 6, insert the fastening block 16 on it into the engagement groove 15, and then rotate the threaded rod 18 clockwise to bring the two vertical inserts 20 into the corresponding vertical insert holes 17.

[0033] Compared with related technologies, the doctor blade pressure adjustment mechanism of the gravure printing machine provided by this utility model has the following beneficial effects:

[0034] This utility model provides a doctor blade pressure adjustment mechanism for a gravure printing machine. Through the abutting and adapting relationship between the push bar 14 and the cone head 10, the rectangular frame 3 can be driven to rise or fall by rotating the double-ended screw 12, thereby forming a downward squeezing force on the pressure spring 8. This allows for adaptive and flexible adjustment of the pressure between the doctor blade 6 and the printing plate, providing good protection for both the doctor blade 6 and the printing plate. Furthermore, the severely worn doctor blade 6 can be quickly replaced by rotating the threaded rod 18, facilitating daily printing use.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A doctor blade pressure adjusting mechanism for a gravure printing machine, comprising a supporting main frame, characterized in that, The main support frame has a single linkage pressure plate slidably mounted on both sides. A rectangular frame is fixedly mounted on the bottom of the linkage pressure plate. An installation plate is provided inside the rectangular frame. A scraper blade is provided below the installation plate. The scraper blade passes through the bottom of the rectangular frame and is movably connected to the bottom of the rectangular frame. A fixing frame is fixedly mounted on the top of the installation plate. Two pressure springs are fixedly mounted on the top of the fixing frame. The top ends of the two pressure springs are fixedly connected to the top inner wall of the rectangular frame. A secondary support frame is fixedly mounted on the top of the main support frame. A connecting column is slidably mounted on the top of the main support frame. The bottom end of the connecting column is fixedly connected to the linkage pressure plate. Its top end extends into the secondary support frame and is fixedly mounted with a cone. A double-ended lead screw is rotatably mounted inside the secondary support frame. Two connecting bars are threaded onto the double-ended lead screw. Push bars are fixedly mounted on the side of the two connecting bars that are close to each other. Both push bars are adapted to the cone.

2. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 1, characterized in that, Two guide slides are fixedly installed inside the rectangular frame. Both guide slides penetrate the mounting plate and are slidably connected to the mounting plate.

3. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 1, characterized in that, A boss is fixedly installed on one side of the outer wall of the support sub-frame, and a set screw is threaded onto the boss. The bottom end of the set screw abuts against the double-ended lead screw.

4. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 1, characterized in that, Both of the two push bars have beveled edges on their sides that are close to each other, and both beveled edges are fitted and adapted to the outer wall of the cone head.

5. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 1, characterized in that, Both sides of the main support frame are provided with long slide rails. The linkage pressure plate passes through the two long slide rails, and uprights are fixedly installed in the two long slide rails. The two uprights pass through the linkage pressure plate and are slidably connected to the linkage pressure plate.

6. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 1, characterized in that, Two engaging slots are provided on one side of the mounting plate, and a fastening block is inserted into each of the two engaging slots. The bottom of each of the two fastening blocks is fixedly connected to the scraper blade.

7. The doctor blade pressure adjusting mechanism of the gravure printing machine according to claim 6, characterized in that, Both of the fastening blocks have vertical recessed holes at their tops. A threaded rod is rotatably mounted on the top of the fixing frame. The bottom end of the threaded rod is rotatably connected to the mounting plate. A linkage plate is threaded onto the threaded rod. Two vertical inserts are fixedly mounted on the bottom of the linkage plate. The bottom ends of the two vertical inserts extend into the two vertical recessed holes, and both vertical inserts are slidably connected to the mounting plate.

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