A low viscosity ink doctoring device

Abstract

The utility model relates to printing technical field especially, and it is a kind of low tack ink scraping device, including ink tank, printing roller is rotatably connected in the ink tank by sealing bearing, fixedly connected with the limiting frame on the ink tank inner wall, the scraping knife is abutted in the limiting frame inner wall, the scraping knife and printing roller are abutted, the scraping knife upper end fixedly connected with threaded cylinder, the threaded cylinder is connected with the pivot through connecting mechanism, the pivot is rotatably connected with the connecting frame through bearing, the connecting frame is fixedly connected on the limiting frame, the pivot is prevented from rotating by anti-rotation mechanism.This utility model avoids the condition that scraping knife changes because of vibration, and the position of scraping knife does not need to be frequently calibrated.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and in particular to a low-viscosity ink scraping device. Background Technology

[0002] During printing, to prevent excessive ink, a doctor blade is used to scrape away excess ink from the printing roller, leaving only the amount needed for printing. Because the doctor blade is in contact with the printing roller, it can wear down. To ensure proper contact between the doctor blade and the printing roller, the doctor blade usually needs to be adjusted. This adjustment is typically done using a threaded connection, which moves the doctor blade to maintain contact with the printing roller. However, due to the continuous vibration of the equipment during printing, the threaded connection can easily loosen, causing the doctor blade to shift. This necessitates frequent recalibration of the doctor blade's position, affecting the printing process. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies that require frequent calibration of the doctor blade position, which affects the printing process, and to propose a low-viscosity ink doctor blade device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A low-viscosity ink scraping device is designed, comprising an ink tank, a printing roller rotatably connected inside the ink tank via a sealed bearing, a limit frame fixedly connected to the inner wall of the ink tank, a scraper blade abutting against the inner wall of the limit frame, the scraper blade abutting against the printing roller, a threaded cylinder fixedly connected to the upper end of the scraper blade, the threaded cylinder being connected to a rotating shaft via a connecting mechanism, the rotating shaft being rotatably connected to a connecting frame via a bearing, the connecting frame being fixedly connected to the limit frame, and the rotating shaft being prevented from rotating by an anti-rotation mechanism.

[0006] Preferably, the bearing is a thrust ball bearing.

[0007] Preferably, the connecting mechanism includes a threaded post, which is fixedly connected to the rotating shaft, and a limiting ring is fixedly connected to the inner wall of the upper end of the threaded cylinder, the inner diameter of which is smaller than the diameter of the threaded post.

[0008] Preferably, a rotating block is fixedly connected to the upper end of the rotating shaft.

[0009] Preferably, the anti-rotation mechanism includes a connecting seat, which is fixedly connected to the connecting frame. An abutment is rotatably connected to the connecting seat. One end of the abutment abuts against the rotating shaft, and the other end of the abutment is fixedly connected to a spring between it and the threaded cylinder. The distance from the lower end of the abutment to the point of rotation is greater than the distance from the upper end of the abutment to the point of rotation.

[0010] Preferably, the spring is a rectangular spring.

[0011] The present invention proposes a low-viscosity ink scraping device, which has the following advantages: by adopting an anti-rotation mechanism to prevent the rotating shaft from rotating, it ensures that the threaded column will not rotate, so that the position of the threaded column in the threaded cylinder will not change, and the position of the scraper blade will not change, thereby avoiding the situation where the scraper blade changes due to vibration, and eliminating the need for frequent calibration of the scraper blade position. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a low-viscosity ink scraping device proposed in this utility model;

[0013] Figure 2 This is a three-dimensional cross-sectional view of a low-viscosity ink scraping device proposed in this utility model.

[0014] Figure 3 This is a perspective view of the doctor blade portion of a low-viscosity ink doctor blade device proposed in this utility model.

[0015] Figure 4 This is a three-dimensional cross-sectional view of the doctor blade portion of a low-viscosity ink doctor blade device proposed in this utility model.

[0016] Figure 5 This utility model proposes a low-viscosity ink scraping device. Figure 4 Enlarged view of section A in the middle.

[0017] In the diagram: 1. Printing roller; 2. Connecting frame; 3. Limiting frame; 4. Doctor blade; 5. Threaded cylinder; 6. Spring; 7. Abutment part; 8. Rotating block; 9. Threaded column; 10. Limiting ring; 11. Connecting seat; 12. Rotating shaft; 13. Ink tank. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1: Refer to Figure 1-5A low-viscosity ink scraping device includes an ink tank 13, a printing roller 1 rotatably connected to the ink tank 13 via a sealed bearing, a limit frame 3 fixedly connected to the inner wall of the ink tank 13, a scraper blade 4 abutting against the inner wall of the limit frame 3, the scraper blade 4 abutting against the printing roller 1, a threaded cylinder 5 fixedly connected to the upper end of the scraper blade 4, a rotating shaft 12 connected to the threaded cylinder 5 via a connecting mechanism, the surface of the rotating shaft 12 being provided with anti-slip texture to increase friction, a connecting frame 2 rotatably connected to the rotating shaft 12 via a bearing, the connecting frame 2 being fixedly connected to the limit frame 3, and the rotating shaft 12 being prevented from rotating by an anti-rotation mechanism. By using an anti-rotation mechanism to prevent the rotating shaft 12 from rotating, it is ensured that the threaded column 9 will not rotate, so that the position of the threaded column 9 in the threaded cylinder 5 will not change, and the position of the scraper blade 4 will not change, thus avoiding the situation where the position of the scraper blade 4 changes due to vibration, and eliminating the need for frequent calibration of the position of the scraper blade 4.

[0020] The bearing is a thrust ball bearing. Since the bearing needs to support the weight of the doctor blade 4, a thrust ball bearing capable of bearing axial force load is used.

[0021] Example 2: Refer to Figure 1-5 As another preferred embodiment of this utility model, based on embodiment 1, the connecting mechanism includes a threaded column 9, which is fixedly connected to the rotating shaft 12. A limiting ring 10 is fixedly connected to the inner wall of the upper end of the threaded cylinder 5. The inner diameter of the limiting ring 10 is smaller than the diameter of the threaded column 9. The limiting ring 10 is used to limit the threaded column 9, preventing the threaded column 9 from detaching from the threaded cylinder 5.

[0022] A rotating block 8 is fixedly connected to the upper end of the rotating shaft 12. The rotating block 8 is used to control and drive the rotating shaft 12 to rotate.

[0023] Example 3: Reference Figure 5 As another preferred embodiment of this utility model, based on embodiment 2, the anti-rotation mechanism includes a connecting seat 11, which is fixedly connected to the connecting frame 2. A contact part 7 is rotatably connected to the connecting seat 11. One end of the contact part 7 abuts against the rotating shaft 12, and the other end of the contact part 7 is fixedly connected to the threaded cylinder 5 with a spring 6. The distance from the lower end of the contact part 7 to the rotation point is greater than the distance from the upper end of the contact part 7 to the rotation point. The spring 6 is a rectangular spring. The spring 6 is in a compressed state. The contact part 7 acts as a lever, which amplifies the restoring force of the spring 6 so that one end of the contact part 7 firmly abuts against the rotating shaft 12, preventing the rotating shaft 12 from rotating due to vibration.

[0024] When the position of the doctor blade 4 needs to be adjusted, the abutment part 7 is pressed, causing the spring 6 to continue to be compressed. The upper end of the abutment part 7 is released from fixing the rotating shaft 12. Then, the rotating block 8 is rotated to drive the rotating shaft 12 to rotate, causing the threaded column 9 to rotate, thereby adjusting the position of the threaded column 9 in the threaded cylinder 5, driving the doctor blade 4 to move within the limit frame 3. The doctor blade 4 abuts against the printing roller 1. Then, the abutment part 7 is released, and under the action of the restoring force of the spring 6, the upper end of the abutment part 7 abuts against the rotating shaft 12 again, fixing the rotating shaft 12.

[0025] 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 low-viscosity ink scraping device, comprising an ink tank (13), characterized in that, The ink tank (13) is rotatably connected to the printing roller (1) via a sealed bearing. A limiting frame (3) is fixedly connected to the inner wall of the ink tank (13). A doctor blade (4) abuts against the inner wall of the limiting frame (3). The doctor blade (4) abuts against the printing roller (1). A threaded cylinder (5) is fixedly connected to the upper end of the doctor blade (4). The threaded cylinder (5) is connected to a rotating shaft (12) via a connecting mechanism. The rotating shaft (12) is rotatably connected to a connecting frame (2) via a bearing. The connecting frame (2) is fixedly connected to the limiting frame (3). The rotating shaft (12) is prevented from rotating by an anti-rotation mechanism.

2. The low-viscosity ink doctor blade device according to claim 1, characterized in that, The bearing is a thrust ball bearing.

3. The low-viscosity ink doctor blade device according to claim 1, characterized in that, The connecting mechanism includes a threaded column (9), which is fixedly connected to the rotating shaft (12). A limiting ring (10) is fixedly connected to the inner wall of the upper end of the threaded cylinder (5), and the inner diameter of the limiting ring (10) is smaller than the diameter of the threaded column (9).

4. The low-viscosity ink doctor blade device according to claim 3, characterized in that, A rotating block (8) is fixedly connected to the upper end of the rotating shaft (12).

5. The low-viscosity ink scraping device according to claim 1, characterized in that, The anti-rotation mechanism includes a connecting seat (11), which is fixedly connected to the connecting frame (2). An abutment part (7) is rotatably connected to the connecting seat (11). One end of the abutment part (7) abuts against the rotating shaft (12), and the other end of the abutment part (7) is fixedly connected to the threaded cylinder (5) with a spring (6). The distance from the lower end of the abutment part (7) to the rotation point is greater than the distance from the upper end of the abutment part (7) to the rotation point.

6. The low-viscosity ink scraping device according to claim 5, characterized in that, The spring (6) is a rectangular spring.

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