Screen printing mechanism capable of realizing self-replacement of screen

Abstract

The utility model discloses a screen printing mechanism capable of realizing self-replacement of a screen, which comprises a pneumatic rod fixedly mounted at the output end of a cylinder, a rack fixedly mounted at one end, far away from the cylinder, of the pneumatic rod, a gear arranged on the side wall of the rack, a triangular block fixedly mounted in the gear, and a wedge-shaped block slidably mounted on the side wall of the triangular block. Springs are fixedly mounted on the side walls of the wedge-shaped blocks, discs are fixedly mounted at the ends, away from the wedge-shaped blocks, of the springs, connecting columns are fixedly mounted in the discs, cross-shaped connecting plates are fixedly mounted on the side walls of the connecting columns, and printing screens are fixedly mounted on the side walls of the cross-shaped connecting plates. And automatic replacement of the printing screen is realized. When the rack moves from back to front, the rack can drive the printing screen plate to do anticlockwise circular motion to be replaced, the replacement time is greatly saved, the printing efficiency is improved, meanwhile, the flexibility of equipment for coping with diversified printing tasks is enhanced, and the printing screen plates with different patterns or specifications can be rapidly switched.

Description

Technical Field

[0001] This utility model belongs to the field of screen printing technology, and in particular relates to a screen printing mechanism that can realize screen replacement. Background Technology

[0002] In today's printing industry, with increasingly diversified and personalized market demands, higher requirements are being placed on the efficiency and flexibility of screen printing. Screen printing, as a widely used printing technology, plays a vital role in printing patterns and text on various products. However, traditional screen printing facilities suffer from numerous drawbacks in screen replacement.

[0003] Traditionally, screen replacement relies on manual operation. This process is not only tedious, requiring operators to possess certain professional skills and experience, but also time-consuming. Each time a screen is replaced, the operator must first stop the machine, then carefully remove the old screen, precisely install the new screen, and perform tedious adjustments and calibrations to ensure the screen is in the correct position. This series of operations often consumes a significant amount of time, causing the printing equipment to be idle for extended periods, severely impacting production efficiency.

[0004] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content

[0005] To achieve the above objectives, this utility model proposes a screen printing mechanism capable of self-changing screens, comprising a base, a replacement mechanism fixedly installed on the side wall of the base, the replacement mechanism comprising a cylinder, the cylinder fixedly installed on the side wall of the base, a pneumatic rod fixedly installed at the output end of the cylinder, a rack fixedly installed at the end of the pneumatic rod away from the cylinder, a gear provided on the side wall of the rack, a triangular block fixedly installed inside the gear, a wedge block slidably installed on the side wall of the triangular block, a spring fixedly installed on the side wall of the wedge block, a disc fixedly installed at the end of the spring away from the wedge block, a connecting column fixedly installed inside the disc, a cross connecting plate fixedly installed on the side wall of the connecting column, and a printing screen fixedly installed on the side wall of the cross connecting plate.

[0006] In one example, the rack and gear mesh with each other.

[0007] In one example, the wedge is slidably mounted inside the disk.

[0008] In one example, a scraper is fixedly mounted on the sidewall of the rack, and the scraper is located above the printing screen.

[0009] In one example, a track is fixedly mounted on the side wall of the base.

[0010] In one example, the rack is slidably mounted inside the track, and a damping rod is fixedly mounted on top of the base.

[0011] In one example, a support plate is fixedly mounted on the top of the damping rod.

[0012] The screen printing mechanism that enables self-changing of the screen plate proposed in this utility model can bring the following beneficial effects:

[0013] 1. This screen printing mechanism employs a clever mechanical transmission design, utilizing a cylinder to drive a pneumatic rod and rack. Through the coordinated action of gears, triangular blocks, springs, and other components, it achieves automatic screen changing. As the rack moves from back to front, it drives the screen in a counter-clockwise circular motion for replacement, meeting diverse printing needs. This eliminates the need for manual screen changing, significantly saving changeover time, improving printing efficiency, and enhancing the equipment's flexibility in handling diverse printing tasks. It allows for rapid switching between different patterns or screen sizes.

[0014] 2. On the one hand, the base and connecting column are connected by a damping bearing. During the replacement of the printing screen and specific action cycles, this ensures that the connecting column can rotate as required while providing appropriate damping to make the rotation smooth, ensuring accurate positioning of the printing screen and avoiding printing deviations caused by shaking. On the other hand, the track on the side wall of the base provides a stable sliding path for the rack. The position of the squeegee fixed on the rack is relatively stable relative to the printing screen, which helps to evenly scrape ink during printing, ensuring the stability and reliability of printing quality. The entire mechanism operates more smoothly and accurately. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Fig. 1 This is a three-dimensional structural diagram of the present invention.

[0017] Fig. 2 This is a schematic diagram of the rack structure of this utility model.

[0018] Fig. 3 This is a schematic diagram of the scraper structure of this utility model.

[0019] Fig. 4 This is a schematic diagram of the gear structure of this utility model.

[0020] Legend: 11. Base; 12. Cylinder; 13. Pneumatic rod; 14. Rack; 15. Gear; 16. Triangular block; 17. Wedge block; 18. Spring; 19. Disc; 21. Connecting column; 22. Cross connecting plate; 23. Printing screen; 24. Scraper; 25. Track; 26. Damping rod; 27. Support plate. Detailed Implementation

[0021] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "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.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication connection; they can refer to 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.

[0025] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0026] like Figs. 1-4 As shown, an embodiment of this utility model proposes a screen printing mechanism that enables self-replacement of the screen. It includes a base 11. In use, pressing down on the receiving plate 27 from top to bottom compresses the damping rod 26. A cylinder 12 is fixedly installed on the side wall of the base 11. The object to be printed is laid flat on top of the receiving plate 27. Releasing the receiving plate 27 causes the damping rod 26 to extend, pushing the material to be printed to the bottom of the printing screen 23. At this point, the cylinder 12 is activated, and the cylinder 12... A pneumatic rod 13 is fixedly installed at the output end. The cylinder 12 drives the pneumatic rod 13 to extend and retract continuously. A rack 14 is fixedly installed at the end of the pneumatic rod 13 away from the cylinder 12. The pneumatic rod 13 drives the rack 14 to extend and retract continuously. When the rack 14 moves from back to front, a gear 15 is provided on the side wall of the rack 14. The rack 14 drives the gear 15 to rotate counterclockwise. The rack 14 and the gear 15 mesh with each other. A triangular block 16 is fixedly installed inside the gear 15. The gear 15 drives the triangular block 16 to rotate counterclockwise.

[0027] A wedge block 17 is slidably installed on the side wall of the triangular block 16. The triangular block 16 is locked on the side wall of the spring 18. The triangular block 16 drives the spring 18 to rotate counterclockwise. The spring 18 is fixedly installed on the side wall of the wedge block 17. The end of the spring 18 away from the wedge block 17 is fixedly installed with the disc 19. The spring 18 drives the disc 19 to rotate counterclockwise. The wedge block 17 is slidably installed inside the disc 19. The disc 19 drives the connecting column 21 to rotate counterclockwise.

[0028] A connecting column 21 is fixedly installed inside the disc 19. The connecting column 21 is connected to the base 11 through a damping bearing. A cross connecting plate 22 is fixedly installed on the side wall of the connecting column 21. The connecting column 21 drives the cross connecting plate 22 to rotate counterclockwise. A printing screen plate 23 is fixedly installed on the side wall of the cross connecting plate 22. The cross connecting plate 22 drives the printing screen plate 23 to rotate counterclockwise in a circular motion to replace the printing screen plate 23 above the receiving plate 27. When the rack 14 moves from front to back, the rack 14 drives the gear 15 to rotate clockwise. The rack 14 is provided with a gear 15 on its side wall. The rack 14 and the gear 15 mesh with each other. The gear 15 drives the triangular block 16 to rotate clockwise in a circular motion. The triangular block 16 is fixedly installed inside the gear 15.

[0029] The inclined surface of the triangular block 16 will cause the wedge block 17 to extend into the disk 19. The wedge block 17 is slidably installed on the side wall of the triangular block 16. The spring 18 will then push the wedge block 17 out. The spring 18 is fixedly installed on the side wall of the wedge block 17. This action is repeated continuously. There is a damping bearing between the base 11 and the connecting column 21, so the connecting column 21 will not rotate. The scraper 24 is fixedly installed on the side wall of the rack 14. The scraper 24 is located above the printing screen 23. The track 25 is fixedly installed on the side wall of the base 11. The rack 14 is slidably installed inside the track 25. The damping rod 26 is fixedly installed on the top of the base 11. The receiving plate 27 is fixedly installed on the top of the damping rod 26.

[0030] Working principle: In use, first press down on the receiving plate 27, which is supported by the damping rod 26 at the top of the base 11, and the damping rod 26 will be compressed. At this time, place the object to be printed flat on the receiving plate 27. Then release the receiving plate 27, and the damping rod 26 will extend, pushing the object upward to the bottom of the printing screen 23, completing the pre-printing preparation and positioning the object in the appropriate printing position.

[0031] The cylinder 12, fixed to the side wall of the base 11, is activated. The cylinder 12 drives the pneumatic rod 13 at its output end to extend and retract continuously, which in turn drives the rack 14 connected to the pneumatic rod 13 to extend and retract continuously. When the rack 14 moves from back to front, the gear 15 meshing with the side wall of the rack 14 rotates counterclockwise. Since a triangular block 16 is fixedly installed inside the gear 15, the rotation of the gear 15 drives the triangular block 16 to rotate counterclockwise as well. During rotation, the triangular block 16 jams the side wall of the spring 18 connected to the wedge block 17, thereby driving the spring 18 to perform a counterclockwise circular motion. The other end of the spring 18 is fixed to the disc 19, so the movement of the spring 18 drives the disc 19 to rotate counterclockwise. The wedge block 17 is slidably installed inside the disc 19, and the disc 19 drives the connecting column 21 to rotate. The connecting column 21 is connected to the base 11 via a damping bearing. This ensures that the connecting column 21 can rotate relative to the base 11 and provides a certain amount of damping, making the rotation process smoother. A cross connecting plate 22 is fixed to the side wall of the connecting column 21. The rotation of the connecting column 21 drives the cross connecting plate 22 to rotate counterclockwise, which in turn drives the printing screen 23 fixed to the side wall of the cross connecting plate 22 to perform counterclockwise circular motion, thereby realizing the replacement of the printing screen 23 above the receiving plate 27 to meet different printing needs.

[0032] When the rack 14 moves from front to back, it also drives the gear 15 meshing with it to rotate clockwise, which in turn causes the triangular block 16 inside the gear 15 to also rotate clockwise. During the rotation, the inclined surface of the triangular block 16 causes the wedge block 17 to extend into the disk 19. Then, the spring 18 connected to the wedge block 17 will push the wedge block 17 out, and this action is repeated continuously. Since there is a damping bearing between the base 11 and the connecting column 21, the connecting column 21 will not rotate during this action, ensuring the stability and repeatability of the specific action of the mechanism at this stage.

[0033] Throughout the process, the scraper 24 fixed to the side wall of the rack 14 is positioned above the printing screen 23 and may play a role in scraping ink during the printing process, assisting in completing the printing operation. At the same time, the track 25 fixed to the side wall of the base 11 provides a sliding track for the rack 14, ensuring the smoothness and accuracy of the rack 14's movement and making the entire mechanism more reliable.

[0034] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0035] The descriptions provided are merely embodiments of the present invention and are not intended to limit the scope of the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A screen printing mechanism capable of self-changing screen printing plates, comprising a base (11), characterized in that, A replacement mechanism is fixedly installed on the side wall of the base (11), and the replacement mechanism includes a cylinder (12); The cylinder (12) is fixedly installed on the side wall of the base (11). A pneumatic rod (13) is fixedly installed at the output end of the cylinder (12). A rack (14) is fixedly installed at the end of the pneumatic rod (13) away from the cylinder (12). A gear (15) is provided on the side wall of the rack (14). A triangular block (16) is fixedly installed inside the gear (15). A wedge block (17) is slidably installed on the side wall of the triangular block (16). A spring (18) is fixedly installed on the side wall of the wedge block (17). A disc (19) is fixedly installed at the end of the spring (18) away from the wedge block (17). A connecting column (21) is fixedly installed inside the disc (19). A cross connecting plate (22) is fixedly installed on the side wall of the connecting column (21). A printing screen plate (23) is fixedly installed on the side wall of the cross connecting plate (22).

2. The screen printing mechanism capable of self-changing screen printing according to claim 1, characterized in that, The rack (14) and gear (15) mesh with each other.

3. A screen printing mechanism capable of self-changing screen printing plates according to claim 2, characterized in that, The wedge block (17) is slidably mounted inside the disk (19).

4. A screen printing mechanism capable of self-changing screen printing plates according to claim 2, characterized in that, A scraper (24) is fixedly installed on the side wall of the rack (14), and the scraper (24) is located above the printing screen (23).

5. A screen printing mechanism capable of self-changing screen printing plates according to claim 1, characterized in that, The base (11) has a track (25) fixedly installed on its side wall.

6. A screen printing mechanism capable of self-changing screen printing plates according to claim 5, characterized in that, The rack (14) is slidably installed inside the track (25), and a damping rod (26) is fixedly installed on the top of the base (11).

7. A screen printing mechanism capable of self-changing screen printing plates according to claim 6, characterized in that, A support plate (27) is fixedly installed on the top of the damping rod (26).

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