A squeegee pressure and angle fine-tuning mechanism for precision printing

Abstract

This application relates to a doctor blade pressure and angle fine-tuning mechanism for precision printing, belonging to the field of precision printing equipment technology. It includes a mounting base comprising a vertically fixed vertical mounting plate and a horizontally arranged horizontal support plate. A base is slidably mounted on the outside of the vertical mounting plate. An angle fine-tuning assembly is mounted on the outer wall of the horizontal support plate. The angle fine-tuning assembly includes an angle adjustment seat mounted on both sides of the horizontal support plate, a fine-tuning screw, a guide slider, a gear, an arc-shaped rack, and an adjustment knob. A doctor blade clamping assembly is provided on the angle adjustment seat. A slide rail is fixedly connected to the top of the base, and a drive cylinder is mounted on the outer wall of the slide rail. This application, by setting up the angle fine-tuning assembly and the drive cylinder, utilizes the meshing of the gear and the arc-shaped rack to drive the angle adjustment seat to rotate, and in conjunction with the drive cylinder, achieves fine-tuning of the doctor blade angle and pressure.

Description

Technical Field

[0001] This application relates to the field of precision printing equipment technology, and in particular to a squeegee pressure and angle fine-tuning mechanism for precision printing. Background Technology

[0002] Currently, in precision printing, the contact pressure and angle between the squeegee and the printing substrate or screen directly affect the uniformity of the ink layer thickness, the clarity of the pattern edges, and the consistency of printing; these are core parameters determining print quality. Squeegee pressure adjustment is often achieved using a cylinder drive or spring-loaded screw-in adjustment, while angle adjustment is achieved through a hinge structure and locking bolts. Existing pressure adjustment technologies are mostly coarse adjustments, lacking precise pressure feedback and control. They are prone to uneven ink layer thickness due to pressure fluctuations. Angle adjustment is fixed by bolt locking, which requires repeated loosening and tightening of bolts during the adjustment process, making the operation cumbersome and the adjustment accuracy low, making it difficult to achieve fine angle adjustments. In addition, the bolts are prone to loosening after long-term use, resulting in angle deviation. Therefore, in response to the above-mentioned technologies, it is necessary to design a doctor blade pressure and angle fine adjustment mechanism for precision printing. Utility Model Content

[0003] The purpose of this application is to provide a squeegee pressure and angle fine-tuning mechanism for precision printing, which has the advantages of high pressure and angle adjustment accuracy and stable squeegee clamping and installation, and solves the problems of coarse pressure adjustment, cumbersome and easy loosening of angle adjustment, and unstable squeegee clamping in the prior art.

[0004] This application provides a squeegee pressure and angle fine-tuning mechanism for precision printing, which adopts the following technical solution: A squeegee pressure and angle fine-tuning mechanism for precision printing includes a mounting base. The mounting base includes a vertically fixed vertical mounting plate and a horizontally arranged horizontal support plate. A base is slidably mounted on the outside of the vertical mounting plate. An angle fine-tuning component is mounted on the outer wall of the horizontal support plate. The angle fine-tuning component includes an angle adjusting seat, a fine-tuning screw, a guide slider, a gear, an arc rack, and an adjusting knob mounted on both sides of the horizontal support plate. A squeegee clamping component is provided on the angle adjusting seat. A slide rail is fixedly connected to the top of the base. A drive cylinder is mounted on the outer wall of the slide rail. The base is provided with threaded holes for connecting to the frame of the printing equipment.

[0005] By adopting the above technical solution, the angle fine-tuning component and the scraper clamping component are installed and fixed on the horizontal support plate. The angle fine-tuning component is used to achieve precise adjustment of the scraper structure angle. The drive cylinder drives the horizontal support plate and the scraper structure to move through the sliding cooperation of the slide rail and the vertical mounting plate.

[0006] Preferably, a rotating shaft is installed on the outer wall of the transverse support plate, and the angle adjustment seat is hinged to the transverse support plate through the rotating shaft. A guide groove is provided on the outer wall of the angle adjustment seat, and a guide slider is slidably arranged in the guide groove of the angle adjustment seat. A gear is fixedly connected to the outer wall of the guide slider, and a fine-tuning screw is fixedly connected to one end of the central shaft of the gear. An adjustment knob is fixedly connected to one end of the fine-tuning screw, and an arc-shaped rack is fixedly connected to one side of the angle adjustment seat.

[0007] By adopting the above technical solution, rotating the adjustment knob drives the fine-tuning screw to rotate, the fine-tuning screw drives the guide slider to slide along the guide groove of the transverse bearing plate, the guide slider drives the gear to rotate, the gear meshes with the arc rack, thereby driving the angle adjustment seat to rotate around the rotating shaft, so as to realize the fine adjustment of the scraper angle.

[0008] Preferably, the gear meshes with the arc-shaped rack, the guide groove has an arc-shaped structure, the center of the arc coincides with the central axis of the rotating shaft, the angle adjustment seat is symmetrically arranged on both sides of the transverse bearing plate, the outer walls of both ends of the transverse bearing plate are provided with threaded mating holes, and the fine adjustment screw is threadedly connected to the threaded mating holes of the transverse bearing plate.

[0009] By adopting the above technical solution, the symmetrically arranged angle adjustment seats on both sides ensure that the scraper clamping assembly is subjected to uniform force, further improving the stability of scraper angle adjustment.

[0010] Preferably, the scraper clamping assembly includes a clamping seat fixed inside the angle adjustment seat, a locking bolt threaded to one side of the clamping seat, a movable clamping plate rotatably connected to one end of the locking bolt, and a scraper structure engaging inside the clamping seat.

[0011] By adopting the above technical solution, rotating the locking bolt can push the movable clamping plate to move inward to the clamping seat, thereby clamping and fixing the scraper structure in the clamping seat, which facilitates the installation and replacement of the scraper structure.

[0012] Preferably, the bottom of the clamping seat is provided with a scraper mounting groove, the movable clamping plate is connected to the clamping seat by a locking bolt, the movable clamping plate and the scraper mounting groove form a clamping cavity, and the scraper mounting groove is provided with an anti-slip rubber pad.

[0013] By adopting the above technical solution, the squeegee mounting groove plays a positioning role for the squeegee structure, ensuring that the squeegee structure is installed in an accurate position. The clamping cavity formed by the movable clamping plate and the squeegee mounting groove can be adapted to squeegee structures of different thicknesses. The anti-slip rubber pad can increase the friction between the squeegee structure and the clamping seat, preventing the squeegee structure from sliding during the printing process.

[0014] Preferably, an elastic push rod is provided on one side of the clamping seat, an elastic spring is provided on the outside of the elastic push rod, the other end of the elastic push rod is fixedly connected to the movable clamping plate, and the elastic spring is fixed between the clamping seat and the movable clamping plate.

[0015] By adopting the above technical solution, when the locking bolt pushes the movable clamping plate to clamp the scraper structure, the elastic top rod presses against the movable clamping plate under the action of the elastic spring, forming an elastic buffer and avoiding damage to the scraper structure due to excessive locking force.

[0016] Preferably, the vertical mounting plate and the horizontal bearing plate are perpendicular to each other, and the output end of the drive cylinder is fixed to the vertical mounting plate.

[0017] By adopting the above technical solution, the guide groove on the transverse bearing plate provides precise guidance for the sliding of the guide slider, ensuring the meshing transmission between the gear and the arc rack, thereby ensuring the accuracy of angle adjustment.

[0018] Preferably, the outer wall of the angle adjustment seat is provided with angle scale lines, and a pointer is provided at the corresponding position of the transverse bearing plate.

[0019] By adopting the above technical solution, the combination of the angle scale line and the pointer makes it easy for operators to intuitively read the adjustment angle of the scraper, realizing the visual adjustment of the angle.

[0020] In summary, this application includes at least one of the following beneficial technical effects: This invention relates to a squeegee pressure and angle fine-tuning mechanism for precision printing. By incorporating an angle fine-tuning component, a gear and an arc-shaped rack mesh with each other. Rotating the adjustment knob drives the fine-tuning screw, which in turn moves the guide slider. The gear and rack mesh together to rotate the angle adjustment seat. Combined with the angle scale and pointer, precise fine-tuning of the squeegee angle is achieved. The drive cylinder, along with the slide and groove, moves the transverse support plate and squeegee structure, ensuring stable adjustment of the contact pressure. The squeegee clamping assembly, with its locking bolts, movable clamping plate, elastic top rod, and anti-slip rubber pad, ensures stable installation and precise clamping of the squeegee. This squeegee device, characterized by high adjustment accuracy, convenient operation, and strong stability, effectively improves the quality of precision printing. Attached Figure Description

[0021] Figure 1 This is an overall diagram of this application; Figure 2 This is a schematic diagram of the connection structure between the mounting base and the slide rail base in this application; Figure 3 This is a schematic diagram of the connection structure of the angle fine-tuning component in this application; Figure 4 This is a side view of the scraper clamping assembly of this application; Figure 5This is a schematic diagram of the scraper clamping assembly of this application.

[0022] In the picture: 1. Mounting base; 101. Vertical mounting plate; 102. Horizontal bearing plate; 2. Base; 3. Angle fine-tuning assembly; 301. Angle adjustment seat; 302. Fine-tuning screw; 303. Guide slider; 304. Gear; 305. Arc rack; 306. Adjustment knob; 4. Scraper clamping assembly; 401. Clamping seat; 402. Locking bolt; 403. Movable clamping plate; 404. Scraper structure; 405. Elastic top rod; 406. Elastic spring; 5. Slide rail seat; 6. Drive cylinder; 7. Threaded hole; 8. Rotating shaft; 9. Guide groove. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0024] Example 1: A squeegee pressure and angle fine-tuning mechanism for precision printing, referring to... Figure 1 , Figure 2 and Figure 3 The system includes a mounting base 1, which comprises a vertically fixed vertical mounting plate 101 and a horizontally arranged horizontal support plate 102. A base 2 is slidably mounted on the outside of the vertical mounting plate 101. An angle fine-tuning assembly 3 is mounted on the outer wall of the horizontal support plate 102. The angle fine-tuning assembly 3 includes an angle adjustment seat 301, a fine-tuning screw 302, a guide slider 303, a gear 304, an arc rack 305, and an adjustment knob 306 mounted on both sides of the horizontal support plate 102. A scraper clamping assembly 4 is provided on the angle adjustment seat 301. A slide rail seat 5 is fixedly connected to the top of the base 2. A drive cylinder 6 is mounted on the outer wall of the slide rail seat 5. The base 2 is provided with a threaded hole 7 for connecting with the printing equipment frame. The mounting bolts of the external printing equipment frame are connected to the threaded hole 7, which is a pre-set installation hole.

[0025] By adopting the above technical solution, the transverse support plate 102 installs and fixes the angle fine adjustment component 3 and the scraper clamping component 4. The angle fine adjustment component 3 is used to achieve precise adjustment of the angle of the scraper structure 404. The drive cylinder 6 drives the transverse support plate 102 and the scraper structure 404 to move through the sliding cooperation of the slide rail with the vertical mounting plate 101.

[0026] Example 2: A squeegee pressure and angle fine-tuning mechanism for precision printing, referring to... Figure 4 and Figure 5A rotating shaft 8 is installed on the outer wall of the transverse support plate 102. The angle adjustment seat 301 is hinged to the transverse support plate 102 via the rotating shaft 8. A guide groove 9 is provided on the outer wall of the angle adjustment seat 301. A guide slider 303 is slidably disposed in the guide groove 9 of the angle adjustment seat 301. A gear 304 is fixedly connected to the outer wall of the guide slider 303. A fine-tuning screw 302 is fixedly connected to one end of the central shaft of the gear 304. An adjustment knob 306 is fixedly connected to one end of the fine-tuning screw 302. An arc-shaped rack 305 is fixedly connected to one side of the angle adjustment seat 301. Rotating the adjustment knob 306 drives the fine-tuning screw 302 to rotate. The fine-tuning screw 302 drives the guide slider 303 to slide along the guide groove 9 of the angle adjustment seat 301. The guide slider 303 drives the gear Rotation of gear 304 causes gear 304 to mesh with the arc-shaped rack 305, thereby driving the angle adjustment seat 301 to rotate around the rotating shaft 8, achieving fine adjustment of the scraper angle. Gear 304 and arc-shaped rack 305 mesh with each other. The guide groove 9 has an arc-shaped structure, and its arc center coincides with the central axis of the rotating shaft 8. The angle adjustment seats 301 are symmetrically arranged on both sides of the transverse support plate 102. Threaded mating holes are opened on the outer walls of both ends of the transverse support plate 102, and the fine-tuning screw 302 is threadedly connected to the threaded mating holes of the transverse support plate 102. The symmetrically arranged angle adjustment seats 301 on both sides ensure that the scraper clamping assembly 4 is subjected to uniform force, further improving the stability of scraper angle adjustment. The scraper clamping assembly 4 includes a clamping seat fixed inside the angle adjustment seat 301. 401. A locking bolt 402 is threadedly connected to one side of the clamping seat 401. A movable clamping plate 403 is rotatably connected to one end of the locking bolt 402. A scraper structure 404 is engaged inside the clamping seat 401. Rotating the locking bolt 402 can push the movable clamping plate 403 to move inward into the clamping seat 401, thereby clamping and fixing the scraper structure 404 inside the clamping seat 401, facilitating the installation and replacement of the scraper structure 404. A scraper mounting groove is provided at the bottom of the clamping seat 401. The movable clamping plate 403 is connected to the clamping seat 401 through the locking bolt 402. The movable clamping plate 403 and the scraper mounting groove form a clamping cavity, and an anti-slip rubber pad is provided inside the scraper mounting groove. The scraper mounting groove plays a positioning role for the scraper structure 404, ensuring the scraper structure 404 is securely fixed. 4. The installation position is accurate. The clamping cavity formed by the movable clamping plate 403 and the scraper mounting groove can accommodate scraper structures 404 of different thicknesses. The anti-slip rubber pad increases the friction between the scraper structure 404 and the clamping seat 401, preventing the scraper structure 404 from sliding during printing. An elastic push rod 405 is provided on one side of the clamping seat 401, and an elastic spring 406 is provided on the outside of the elastic push rod 405. The other end of the elastic push rod 405 is fixedly connected to the movable clamping plate 403. The elastic spring 406 is fixed between the clamping seat 401 and the movable clamping plate 403. When the locking bolt 402 pushes the movable clamping plate 403 to clamp the scraper structure 404, the elastic push rod 405 presses against the movable clamping plate 403 under the action of the elastic spring 406, forming an elastic buffer.To prevent damage to the scraper structure 404 due to excessive locking force, four elastic push rods 405 and four elastic springs 406 are provided, with each pair corresponding to a specific one. During pre-tightening, this prevents the movable clamping plate 403 from being too long, thus avoiding uneven pressure on both sides of the locking bolt 402 during the forward clamping process, which could lead to excessive clamping pressure in the middle and prevent the scraper structure 404 from breaking in the middle. Furthermore, the vertical mounting plate 101 and the horizontal support plate 102 are perpendicular to each other, and the output end of the drive cylinder 6 is fixed to the vertical mounting plate 101, ensuring the meshing transmission of the gear 304 and the arc-shaped rack 305, thereby guaranteeing the accuracy of angle adjustment. The outer wall of the angle adjustment seat 301 is provided with angle scale lines, and a pointer is provided at the corresponding position on the horizontal support plate 102. The combination of the angle scale lines and the pointer allows the operator to intuitively read the scraper's adjustment angle, achieving visual angle adjustment.

[0027] The implementation principle of this application embodiment is as follows: First, the scraper structure 404 is placed into the scraper mounting groove of the clamping seat 401. Rotating the locking bolt 402 can push the movable clamping plate 403 to move inward to the clamping seat 401, thereby clamping and fixing the scraper structure 404 in the clamping seat 401, which facilitates the installation and replacement of the scraper structure 404. The elastic top rod 405 presses against the movable clamping plate 403 under the action of the elastic spring 406 to achieve elastic clamping. The clamping cavity formed by the movable clamping plate 403 and the scraper mounting groove can be adapted to scraper structures 404 of different thicknesses. The anti-slip rubber pad can increase the friction between the scraper structure 404 and the clamping seat 401 and prevent the scraper structure 404 from sliding during the printing process. Secondly, rotating the adjustment knob 306 drives the fine-tuning screw 302 to rotate. The fine-tuning screw 302 drives the guide slider 303 to slide along the guide groove 9 of the transverse support plate 102. The guide slider 303 drives the gear 304 to rotate. The gear 304 meshes with the arc-shaped rack 305, thereby driving the angle adjustment seat 301 to rotate around the rotating shaft 8, realizing the fine adjustment of the scraper angle. The adjustment angle can be read through the angle scale line and pointer until the desired angle is reached. Combined with the intuitive reading of the scraper adjustment angle by the operator, the angle can be visually adjusted. Finally, when adjusting the squeegee pressure, the drive cylinder 6 is activated. The cylinder body of the drive cylinder 6 is fixed on the slide rail seat 5, and the end of its piston rod is fixed to the vertical mounting plate 101 or the mounting base 1. When the cylinder piston rod extends, it pushes the entire mounting base 1 to slide downwards along the slide rail seat 5, causing the squeegee structure 404 to press against the printing substrate. By adjusting the intake pressure of the drive cylinder 6 through an external precision air pressure regulating valve (not shown in the figure), the output thrust of the cylinder can be continuously and stably changed, thereby achieving stepless control of the overall contact pressure of the squeegee. This cylinder drive method has a simple structure and fast response. Combined with a high-precision air pressure valve, it can meet the pressure stability requirements of precision printing. The anti-slip rubber pad and the elastic top rod 405 ensure that the squeegee is firmly clamped and avoids displacement, thereby ensuring the stability of printing quality.

Claims

1. A squeegee pressure and angle fine-tuning mechanism for precision printing, comprising a mounting base (1), characterized in that: The mounting base (1) includes a vertically fixed vertical mounting plate (101) and a horizontally arranged horizontal support plate (102). A base (2) is slidably mounted on the outside of the vertical mounting plate (101). An angle fine-tuning component (3) is mounted on the outer wall of the horizontal support plate (102). The angle fine-tuning component (3) includes an angle adjustment seat (301), a fine-tuning screw (302), a guide slider (303), a gear (304), an arc rack (305), and an adjustment knob (306) mounted on both sides of the horizontal support plate (102). A scraper clamping component (4) is provided on the angle adjustment seat (301). A slide rail seat (5) is fixedly connected to the top of the base (2). A drive cylinder (6) is mounted on the outer wall of the slide rail seat (5). A threaded hole (7) for connecting with the printing equipment frame is provided on the base (2).

2. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 1, characterized in that: A rotating shaft (8) is installed on the outer wall of the transverse support plate (102). The angle adjustment seat (301) is hinged to the transverse support plate (102) through the rotating shaft (8). A guide groove (9) is provided on the outer wall of the angle adjustment seat (301). A guide slider (303) is slidably arranged in the guide groove (9) of the angle adjustment seat (301). A gear (304) is fixedly connected to the outer wall of the guide slider (303). A fine adjustment screw (302) is fixedly connected to one end of the central shaft of the gear (304). An adjustment knob (306) is fixedly connected to one end of the fine adjustment screw (302). An arc-shaped rack (305) is fixedly connected to one side of the angle adjustment seat (301).

3. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 2, characterized in that: The gear (304) meshes with the arc-shaped rack (305), the guide groove (9) is an arc-shaped structure, and its arc center coincides with the central axis of the rotating shaft (8). The angle adjustment seat (301) is symmetrically arranged on both sides of the transverse bearing plate (102). The outer walls of both ends of the transverse bearing plate (102) are provided with threaded docking holes, and the fine adjustment screw (302) is threadedly connected to the threaded docking holes of the transverse bearing plate (102).

4. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 1, characterized in that: The scraper clamping assembly (4) includes a clamping seat (401) fixed inside the angle adjustment seat (301). A locking bolt (402) is threadedly connected to one side of the clamping seat (401). A movable clamping plate (403) is rotatably connected to one end of the locking bolt (402). A scraper structure (404) is engaged inside the clamping seat (401).

5. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 4, characterized in that: The bottom of the clamping seat (401) is provided with a scraper mounting groove. The movable clamping plate (403) is connected to the clamping seat (401) by a locking bolt (402). The movable clamping plate (403) and the scraper mounting groove form a clamping cavity, and the scraper mounting groove is provided with an anti-slip rubber pad.

6. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 4, characterized in that: An elastic push rod (405) is provided on one side of the clamping seat (401), and an elastic spring (406) is provided on the outside of the elastic push rod (405). The other end of the elastic push rod (405) is fixedly connected to the movable clamping plate (403), and the elastic spring (406) is fixed between the clamping seat (401) and the movable clamping plate (403).

7. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 1, characterized in that: The vertical mounting plate (101) and the horizontal bearing plate (102) are perpendicular to each other, and the output end of the driving cylinder (6) is fixed to the vertical mounting plate (101).

8. The squeegee pressure and angle fine-tuning mechanism for precision printing according to claim 1, characterized in that: The outer wall of the angle adjustment seat (301) is provided with angle scale lines, and the corresponding position of the transverse bearing plate (102) is provided with a pointer.

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