A micro-feeding mechanism for a flexographic printing machine squeegee

Abstract

The utility model discloses a kind of soft plate printing machine ink scraping knife micro-feeding mechanism, including installation base, moving plate, transmission block, scraper clamp, ink scraping knife and network pattern ink transfer roller, and moving plate and transmission block are slidably connected in installation base top end;Precise differential head is equipped on moving plate, the end of micrometer screw is on the side of transmission block, and elastic reset element is equipped on the side wall of moving plate at the position of the both sides of precise differential head;Scraper clamp is fixedly connected with transmission block by connecting rod, and scraper clamp is fixedly connected with ink scraping knife by bolt, and network pattern ink transfer roller is rotatably connected on the wallboard of printing machine by rack. In conclusion, the utility model overcomes the deficiency of prior art, and the design is reasonable, through the ingenious "moving plate-transmission block" two-stage sliding structure, and the driving mode of combining "coarse adjustment-fine adjustment", compared with prior art, significant technical progress is achieved, and has higher social use value and application prospect.

Description

Technical Field

[0001] This utility model relates to the field of flexographic printing technology, and in particular to a micro-feed mechanism for the doctor blade of a flexographic printing press. Background Technology

[0002] In flexographic printing, the doctor blade's function is to scrape away excess ink from the surface of the anilox roller. The pressure and contact angle between the doctor blade and the anilox roller (i.e., the blade position) are key factors affecting print quality. The wear and replacement of the doctor blade, or its adaptation to different ink viscosities, all require precise fine-tuning of the doctor blade's position.

[0003] Currently, most common doctor blade adjustment mechanisms use a bolt-driven, set-screw method. This method has the following drawbacks:

[0004] 1) Low adjustment accuracy: The pitch of ordinary threads is relatively large, and one rotation often moves 0.5mm to 1mm, making it difficult to achieve fine adjustment at the 0.01mm level.

[0005] 2) Backlash exists: Threaded drives have inherent backlash error, which will cause lag during forward and reverse adjustment and affect positioning accuracy.

[0006] 3) Narrow adjustment range: After replacing the doctor blade, replacing the anilox roller of different specifications, or performing large-scale maintenance, the position of the doctor blade may need to be moved by several millimeters or even more. The existing feeding mechanism can only make fine adjustments to the doctor blade, which is very inconvenient.

[0007] Therefore, there is an urgent need for a doctor blade micro-feed mechanism that can achieve high precision, zero backlash, and a wide adjustment range. Utility Model Content

[0008] In order to solve the problems mentioned in the background art, the present invention provides a micro-feeding mechanism for the doctor blade of a flexographic printing press.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A micro-feeding mechanism for a flexographic printing press includes a mounting base, a moving plate, a transmission block, a doctor blade clamp, an ink doctor blade, and an anilox roller. The moving plate and the transmission block are slidably connected to the top of the mounting base.

[0011] The moving plate is equipped with a precision micrometer head, the end of which rests against the side of the transmission block. The side wall of the moving plate is equipped with elastic reset elements on both sides of the precision micrometer head.

[0012] The doctor blade clamp is fixedly connected to the transmission block via a connecting rod, and the doctor blade clamp is fixedly connected to the ink doctor blade via bolts. The anilox ink transfer roller is rotatably connected to the printing press wall panel via the frame.

[0013] Preferably, a slide rail is installed on the mounting base, the bottom of the moving plate is machined with a first slide groove that precisely matches the slide rail, and the bottom of the transmission block is provided with a second slide groove that precisely matches the slide rail.

[0014] Preferably, the micrometer screw end of the precision micrometer head is provided with a wear-resistant pad at the contact position with the transmission block.

[0015] Preferably, the mounting base has a coarse adjustment threaded rod on its side wall, which engages with a threaded hole on the mounting base, and its end is rotatably connected to the moving plate through a bearing or a spherical structure.

[0016] Preferably, the outer end of the coarse adjustment threaded rod is provided with a rotating handle.

[0017] Preferably, the axis of the coarse adjustment threaded rod is parallel to the axis of the precision micrometer head micrometer screw.

[0018] Preferably, the elastic reset element is a compression spring.

[0019] Preferably, the precision micrometer head is fixed to the mounting base by a locking nut.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. Dual adjustment for high precision: The moving plate is responsible for coarse adjustment over a wide range, while the transmission block is responsible for micron-level fine adjustment. The division of labor is clear, and the final precision is guaranteed by the precision micrometer head.

[0022] 2. High-precision adjustment: Using a precision micrometer head as the driving element, its minimum scale can reach 0.01mm or even 0.001mm, realizing ultra-fine adjustment of the doctor blade position and significantly improving printing quality.

[0023] 3. Complete elimination of backlash: The elastic reset element 23 keeps the transmission block 3 and the micrometer screw of the micrometer head in a pressed state at all times, realizing true backlash-free transmission, and the forward and reverse adjustment is accurate.

[0024] In summary, this utility model overcomes the shortcomings of the prior art, has a reasonable design, and achieves significant technological progress compared with the prior art through a clever "moving plate-transmission block" two-stage sliding structure and a "coarse adjustment-fine adjustment" driving method. It has high social use value and application prospects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the mounting base structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the transmission block structure of this utility model.

[0029] In the diagram: 1. Mounting base; 2. Moving plate; 3. Transmission block; 4. Squeegee clamp; 5. Ink scraper; 6. Anilox ink transfer roller; 11. Slide rail; 21. First slide groove; 22. Precision micrometer head; 23. Elastic reset element; 24. Coarse adjustment threaded rod; 241. Rotating handle; 31. Connecting rod; 61. Frame. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Example 1

[0032] Reference Figure 1-3 A micro-feeding mechanism for a flexographic printing press doctor blade includes a mounting base 1, a moving plate 2, a transmission block 3, a doctor blade clamp 4, an ink doctor blade 5, and an anilox roller 6. The mounting base 1 is fixed to the printing press wall panel by bolts, and a slide rail 11 is installed on it.

[0033] The bottom of the movable plate 2 is machined with a first groove 21 that precisely matches the slide rail 11, so that the movable plate 2 can slide smoothly and linearly along the slide rail 11.

[0034] The bottom of the transmission block 3 is provided with a second slide groove 301 that precisely matches the slide rail 11, so that the transmission block 3 can slide along the slide rail 11.

[0035] The movable plate 2 is equipped with a precision micrometer head 22 (in this embodiment, a mechanical micrometer head with a minimum scale of 0.01mm is used). The end of its micrometer screw rests against the side of the transmission block 3. Elastic reset elements 23, which are compression springs, are located on the sidewalls of the movable plate 2 on both sides of the precision micrometer head 22. The movable end of the elastic reset element 23 is fixedly connected to the right side wall of the transmission block 3. The preload of the elastic reset element 23 causes the transmission block 3 to always tend to move towards the movable plate and press against the end of the micrometer screw. The end of the micrometer screw directly rests against the side of the transmission block 3. A wear-resistant pad 221 made of hard alloy material can be added at the contact point to reduce wear after long-term use.

[0036] The doctor blade clamp 4 is fixedly connected to the transmission block 3 via the connecting rod 31. The doctor blade clamp 4 is fixedly connected to the ink doctor blade 5 via bolts. The anilox ink transfer roller 6 is rotatably connected to the printing press wall panel via the frame 61. The ink doctor blade 5 scrapes off the excess ink on the anilox ink transfer roller 6.

[0037] The mounting base 1 has a coarse adjustment threaded rod 24 on its side wall. The coarse adjustment threaded rod 24 mates with the threaded hole on the mounting base 1, and its end is rotatably connected to the movable plate 2 through a bearing or spherical structure. The outer end of the coarse adjustment threaded rod 24 is provided with a rotating handle 241. By rotating the rotating handle 241 fixed to the outer end of the coarse adjustment threaded rod 24, the entire movable plate 2 can be driven to make coarse adjustments.

[0038] Working principle: Rotating the handle 241 pushes the moving plate 2 and the transmission block 3, the doctor blade clamp 4 and the ink doctor blade 5, which are slidably connected to it, to move together through the coarse adjustment threaded rod 24 for rapid macroscopic positioning;

[0039] Rotate the knob of the precision micrometer head 22. When rotated clockwise, the micrometer screw pushes the transmission block 3 to move slightly in the direction of the anilox roller 6, overcoming the force of the elastic reset element 23. Since the transmission block 3 and the moving plate 2 are slidably connected, this slight movement is precisely transmitted to the doctor blade holder 4 and the ink doctor blade 5 through the connecting rod 31, achieving feed. When rotated counterclockwise, the micrometer screw retracts, and the elastic reset element 23 pushes the transmission block 3 to move slightly in the other direction, achieving retraction. During this process, there is no gap between the transmission block 3 and the micrometer screw, and the position of the moving plate 2 remains unchanged. After fine-tuning, lock the precision micrometer head 22.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A micro-feed mechanism for the doctor blade of a flexographic printing press, characterized in that, include Mounting base (1), moving plate (2), transmission block (3), doctor blade clamp (4), ink doctor blade (5) and anilox ink transfer roller (6), with the moving plate (2) and transmission block (3) slidably connected to the top of the mounting base (1); The movable plate (2) is provided with a precision micrometer head (22), the end of which is pressed against the side of the transmission block (3), and the side wall of the movable plate (2) is provided with elastic reset elements (23) on both sides of the precision micrometer head (22). The doctor blade clamp (4) is fixedly connected to the transmission block (3) via the connecting rod (31), and the doctor blade clamp (4) is fixedly connected to the ink doctor blade (5) via bolts. The anilox ink transfer roller (6) is rotatably connected to the printing press wall panel via the frame (61).

2. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 1, characterized in that: A slide rail (11) is installed on the mounting base (1). The bottom of the moving plate (2) is machined with a first slide groove (21) that precisely matches the slide rail (11). The bottom of the transmission block (3) is provided with a second slide groove (301) that precisely matches the slide rail (11).

3. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 1, characterized in that: The micrometer screw side of the precision micrometer head (22) is provided with a wear-resistant pad (221) at the contact position with the transmission block (3).

4. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 1, characterized in that: The mounting base (1) has a coarse adjustment threaded rod (24) on its side wall. The coarse adjustment threaded rod (24) is engaged with the threaded hole on the mounting base (1), and its end is rotatably connected to the moving plate (2) through a bearing or spherical structure.

5. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 4, characterized in that: The coarse adjustment thread rod (24) is provided with a rotating handle (241) at its outer end.

6. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 5, characterized in that: The axis of the coarse adjustment threaded rod (24) is parallel to the axis of the micrometer screw of the precision micrometer head (22).

7. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 1, characterized in that: The elastic reset element (23) is a compression spring.

8. The micro-feed mechanism for the doctor blade of a flexographic printing press according to claim 1, characterized in that: The precision micrometer head (22) is fixed to the mounting base (1) by a locking nut.

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