Scraper structure for silk-screen printing

Abstract

The scraper structure comprises a connecting frame, an installation frame is arranged at the bottom of the connecting frame, an opening which is open outwards is formed in the bottom of the installation frame, the installation frame comprises two oppositely-arranged side walls, a connecting shaft is arranged between the side walls, and a scraper rotationally connected with the installation frame is arranged on the connecting shaft. The bottom of the scraper extends to the outer side of the opening; a driven gear rotationally connected with the side wall is arranged on the inner side of the side wall, a rotating block is arranged at the position, close to the edge, of the driven gear, the rotating block is rotationally connected with the driven gear, a sliding groove is formed in the rotating block, and the end of the scraper is inserted into the sliding groove and slidably connected with the rotating block; a motor is arranged on one side of the side wall, a driving gear is arranged at the output end of the motor, and the driving gear is meshed with the driven gear. The angle of the scraper is rapidly adjusted through driving of the motor, the function of printing or liquid returning can be achieved when the scraper swings in different directions, the number of the scrapers is reduced, and work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scrapers, in particular to a scraper structure for screen printing. Background Art

[0002] The scraper in screen printing is a key component in the screen printing process. It is responsible for squeezing the ink through the mesh holes on the screen printing plate onto the substrate. The scraper angle affects the ink delivery volume. When the angle is larger, the contact area between the scraper and the screen increases, which may cause more ink to pass through the mesh holes, thus increasing the ink delivery volume. While a smaller angle may result in a reduced ink delivery volume. Generally, the scraper angle is set between 45° and 70°. A steeper angle (close to 90°) is suitable for large-area printing that requires a thicker ink layer, while a flatter angle (close to 45°) is suitable for printing fine patterns and details. The correct scraper angle helps the ink to be evenly distributed on the screen, ensuring the consistency and uniformity of the printed pattern. If the angle is improper, it may lead to uneven ink distribution, affecting the overall appearance of the printed product. The angle adjustment of the scraper is crucial for the quality of screen printing and needs to be adjusted according to specific printing requirements and conditions. Summary of the Utility Model

[0003] Aiming at the above existing technical problems, the purpose of the utility model is to provide a scraper structure for screen printing, which is convenient for adjusting the angle of the scraper.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A scraper structure for screen printing, including a connecting frame. There is an installation frame at the bottom of the connecting frame. There is an outward-opening at the bottom of the installation frame. The installation frame includes two opposite side walls. There is a connecting shaft between the side walls. A scraper rotatably connected to the installation frame is arranged on the connecting shaft. The bottom of the scraper extends outside the opening. There is a driven gear rotatably connected to the inner side of the side wall. There is a rotating block at a position near the edge of the driven gear. The rotating block is rotatably connected to the driven gear. There is a chute facing the scraper on the rotating block. The end of the scraper is inserted into the chute and slidably connected to the rotating block. There is a motor on one side of the side wall. A driving gear is arranged at the output end of the motor. The driving gear and the driven gear are meshed and connected. When the motor operates, the scraper swings around the connecting shaft.

[0006] Preferably, a turntable is fixedly connected to the driven gear. The central axis of the turntable is far from the central axis of the driven gear. There is a connecting hole on the turntable. The connecting hole is far from the central axis of the turntable. The rotating block is rotatably connected to the turntable through the connecting hole.

[0007] Preferably, the central axes of the connecting shaft and the driven gear are on the same vertical plane.

[0008] Preferably, the bottom of the squeegee is provided with an oblique angle.

[0009] Preferably, the maximum swing angle of the squeegee is 70°.

[0010] Preferably, the connecting frame is connected to a moving arm, and when the moving direction of the moving arm changes, the swing direction of the squeegee changes synchronously.

[0011] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0012] The squeegee structure for screen printing of the present utility model includes a connecting frame. The bottom of the connecting frame is provided with a mounting frame. The bottom of the mounting frame is provided with an outward-opening opening. The mounting frame includes two oppositely arranged side walls. A connecting shaft is arranged between the side walls. A squeegee rotatably connected to the mounting frame is arranged on the connecting shaft. The bottom of the squeegee extends to the outside of the opening. An inner side of the side wall is provided with a driven gear rotatably connected to the side wall. A rotating block is arranged at a position near the edge of the driven gear. The rotating block is rotatably connected to the driven gear. A chute facing the squeegee is arranged on the rotating block. An end of the squeegee is inserted into the chute and slidably connected to the rotating block. A motor is arranged on one side of the side wall. The output end of the motor is provided with a driving gear. The driving gear and the driven gear are meshed and connected. When the motor operates, the squeegee swings around the connecting shaft, and the angle adjustment of the squeegee is realized under the drive of the motor, which is fast and convenient. When the squeegee swings in different directions, the functions of printing or liquid return can be realized, the number of squeegees required is reduced, the cost is reduced, the structure is simple, and the use is reliable. Description of the Drawings

[0013] The technical solutions of the present utility model will be further described below with reference to the drawings:

[0014] Att Figure 1 is a perspective view of the squeegee structure for screen printing of the present utility model;

[0015] Att Figure 2 is a perspective view of the squeegee structure for screen printing of the present utility model with some structures hidden;

[0016] Att Figure 3 is a connection schematic diagram of the driven gear and the rotating block of the squeegee structure for screen printing of the present utility model;

[0017] Att Figure 4 is a schematic diagram of the squeegee of the squeegee structure for screen printing of the present utility model swinging to one side;

[0018] Att Figure 5 is a schematic diagram of the squeegee of the squeegee structure for screen printing of the present utility model swinging to the other side.

[0019] Wherein: 1. connecting frame; 2. mounting frame; 21. opening; 22. side wall; 23. connecting shaft; 3. scraper; 31. bevel angle; 4. driven gear; 5. rotating block; 51. sliding groove; 6. motor; 7. driving gear; 8. turntable. Detailed implementation manner

[0020] The following will elaborate on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.

[0021] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0022] As shown in the attached Figure 1 figure, the structure of the scraper for screen printing of the present utility model is shown, which includes a connecting frame 1. The bottom of the connecting frame 1 is connected with a mounting frame 2. An outwardly open opening 21 is formed at the bottom of the mounting frame 2. The mounting frame 2 includes two relatively arranged side walls 22. A connecting shaft 23 is installed between the side walls 22. A scraper 3 rotatably connected to the mounting frame 2 is installed on the connecting shaft 23. The bottom of the scraper 3 extends to the outside of the opening 21. As shown in the attached Figure 2 figure, a driven gear 4 rotatably connected to the side wall 22 is installed on the inner side of the side wall 22. A rotating block 5 is connected to a position near the edge of the driven gear 4. The rotating block 5 is rotatably connected to the driven gear 4. A sliding groove 51 facing the scraper 3 is machined on the rotating block 5. The end of the scraper 3 is inserted into the sliding groove 51 and is slidably connected to the rotating block 5. A motor 6 is installed on one side of the side wall 22. A driving gear 7 is installed at the output end of the motor 6. The driving gear 7 and the driven gear 4 are meshed and connected. When the motor 6 operates, the scraper 3 is driven to swing around the connecting shaft 23.

[0023] As shown in the attached Figure 3 figure, a turntable 8 is fixedly connected to the driven gear 4. The central axis of the turntable 8 is far from the central axis of the driven gear 4. The turntable 8 has a connecting hole. The connecting hole is far from the central axis of the turntable 8. The rotating block 5 is rotatably connected to the turntable 8 through the connecting hole. Adding the turntable 8 as an intermediate member reduces the opening on the driven gear 4 and avoids insufficient strength of the driven gear 4, making the overall structure more stable.

[0024] In this embodiment, the central axes of the connecting shaft 23 and the driven gear 4 are in the same vertical plane, so that the swinging amplitudes of the squeegee 3 on both sides are the same, adapting to different working states.

[0025] The bottom of the squeegee 3 is machined with an inclined angle 31 to help the ink be more evenly distributed, improving the clarity of the printed pattern and the sharpness of the edge. The maximum swinging angle of the squeegee 3 is 70°. Adjust the angle of the squeegee 3 according to the actual printing conditions and experience to achieve the best printing effect.

[0026] The connecting frame 1 is connected to a moving arm and moves above the screen plate along with the movement of the moving arm. When the moving direction of the moving arm changes, the swinging direction of the squeegee 3 changes synchronously. It can not only extrude the ink during printing to make the ink pass through the screen printing plate, but also scrape back the excess ink after changing the moving direction, enabling the same squeegee 3 to achieve two different functions.

[0027] The squeegee structure for screen printing of the present utility model is simple in structure and convenient to use. The angle of the squeegee can be quickly adjusted by motor drive. When the squeegee swings in different directions, it can realize the functions of printing or liquid return, reducing the need for the number of squeegees, lowering the cost, having a simple structure, being reliable in use, and improving the working efficiency.

[0028] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A scraper structure for screen printing, characterized in that: It includes a connecting frame, a mounting frame is provided at the bottom of the connecting frame, an opening is provided at the bottom of the mounting frame, the mounting frame includes two oppositely arranged side walls, a connecting shaft is provided between the side walls, a scraper is provided on the connecting shaft and is rotatably connected to the mounting frame, and the bottom of the scraper extends to the outside of the opening; a driven gear rotatably connected to the side wall is provided on the inner side of the side wall, a rotating block is provided at the portion of the driven gear close to the edge, the rotating block is rotatably connected to the driven gear, a sliding groove facing the scraper is provided on the rotating block, an end of the scraper is inserted into the sliding groove and is slidably connected to the rotating block; a motor is provided on one side of the side wall, a driving gear is provided at the output end of the motor, the driving gear and the driven gear are meshed and connected, and the scraper swings around the connecting shaft when the motor is running.

2. The screen printing scraper structure according to claim 1, characterized in that: The driven gear is fixedly connected with a turntable, the central axis of the turntable is far away from the central axis of the driven gear, a connecting hole is provided on the turntable, the connecting hole is far away from the central axis of the turntable, and the rotating block is rotatably connected with the turntable through the connecting hole.

3. The screen printing scraper structure according to claim 1, characterized in that: The central axes of the connecting shaft and the driven gear are on the same vertical plane.

4. The screen printing scraper structure according to claim 1, characterized in that: The bottom of the scraper is provided with an oblique angle.

5. The screen printing scraper structure according to claim 1, characterized in that: The maximum swing angle of the scraper is 70°.

6. The screen printing scraper structure according to claim 1, characterized in that: The connecting frame is connected to a moving arm, and when the moving direction of the moving arm changes, the swinging direction of the scraper changes synchronously.

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