A printing platform positioning device

Abstract

The utility model discloses a printing platform positioning device, including printing platform, the bearing plate of fixed connection in the printing platform upper end, the two first guide rails of fixed connection in bearing plate upper end, the guide block of sliding in the first guide rail side wall, the moving plate of fixed connection in two guide block upper end, the first positioning mechanism of fixed connection in moving plate upper end, place in the two flat positioning mechanism of moving plate upper end, set up in the rolling flat component of moving plate upper end, set up in the fixed frame of printing platform one side and set up in the hot -press mechanism for hot -pressing of fixed frame, moving plate inner wall fixed connection has the first magnet plate, be equipped with the camera mechanism on the fixed frame, be equipped with the locking mechanism for to the first positioning mechanism locking on the hot -press mechanism, be equipped with the second positioning mechanism on moving plate. The utility model has the advantages of accurate positioning, can avoid damaging flexible material, adapt to multiple materials and can improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically to a printing platform positioning device. Background Technology

[0002] In the heat transfer process, the accurate and rapid positioning of the printing platform is crucial to ensuring the quality of the transfer when transferring patterns to the substrate. During the heat transfer process, the flexible substrate must be flat and fixed in the preset position on the platform. The pattern on the transfer film is accurately transferred to the surface of the substrate by heating and pressurizing. Once the positioning is deviated, it is easy to cause the pattern to shift, overlap or blur the edges, which directly affects the product qualification rate.

[0003] Currently, positioning devices for heat transfer printing of flexible objects still have significant limitations. When mechanical positioning structures come into contact with the substrate, the positioning reference is easily shifted due to the stretching and deformation of the flexible material. Furthermore, frequent insertion and removal may cause damage to the substrate fibers. At the same time, different substrates have different thicknesses and elasticities, and the fixed gap of mechanical positioning is difficult to adapt to diverse materials. This results in cumbersome rapid positioning operations and repeated adjustments when changing the substrate, which seriously affects production efficiency and needs further improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a printing platform positioning device, which has the advantages of accurate positioning, avoiding damage to the printing substrate, adapting to various materials, and improving production efficiency, thus solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A printing platform positioning device includes a printing table, a support plate fixed to the upper end of the printing table, two first guide rails fixed to the upper end of the support plate, guide blocks slidably disposed on the side walls of the first guide rails, a movable plate fixed to the upper ends of the two guide blocks, a first positioning mechanism fixed to the upper end of the movable plate, two flattening positioning mechanisms placed on the upper end of the movable plate, a rolling flattening assembly disposed on the upper end of the movable plate, a fixed frame disposed on one side of the printing table, and a hot pressing mechanism disposed on the fixed frame for hot pressing. A first magnet plate is fixedly connected to the inner wall of the movable plate.

[0007] The camera mechanism is mounted on the fixed frame;

[0008] The hot pressing mechanism is equipped with a locking mechanism for locking the first positioning mechanism;

[0009] A second positioning mechanism is provided on the moving plate.

[0010] Preferably, the hot pressing mechanism includes a hydraulic cylinder and a second guide rail fixed to one end of the fixed frame near the printing table, a slider slidably disposed on the side wall of the second guide rail, a connecting block fixed to one end of the slider near the printing table, a weight fixed to the connecting block, and a hot pressing plate fixed to the lower end of the weight. The lower end of the output shaft of the hydraulic cylinder is fixed to the upper end of the connecting block.

[0011] It is worth noting that the hot pressing mechanism provides a stable driving force through the hydraulic cylinder. Combined with the sliding guidance of the second guide rail and the slider, it can ensure that the hot pressing plate moves accurately and smoothly during the up and down movement, avoiding deviation. The weight can increase the pressure during hot pressing, making the pressure of the hot pressing plate on the substrate more uniform. Combined with the heating function of the hot pressing plate, it can effectively ensure the clarity and firmness of the transferred pattern and improve the transfer quality.

[0012] Preferably, the first positioning mechanism includes a long block fixed to the upper edge of the movable plate, two fixed posts fixed to the upper end of the long block, and an L-shaped block fixed to the center of the upper end of the long block, with two first insertion holes through one side of the L-shaped block.

[0013] It is worth noting that the long block provides a stable mounting base for the fixed column and the L-shaped block. The two fixed columns can be precisely matched with the U-shaped seat of the locking mechanism to achieve the initial positioning and guidance of the moving plate. The first insertion hole on the L-shaped block is adapted to the output shaft of the dual-axis cylinder of the locking mechanism, providing a precise positioning reference for subsequent locking operations.

[0014] Preferably, the locking mechanism includes a U-shaped seat, a dual-axis cylinder, and a limiting body. Two U-shaped seats, a dual-axis cylinder, and a limiting body are fixedly connected to the end of the weight away from the fixed frame. When the moving plate moves toward the fixed frame, the fixed column moves to the inner wall of the U-shaped seat. Two second insertion holes are opened through one side of the limiting body. The two output shafts of the dual-axis cylinder can pass through the first insertion hole and move to the inner wall of the second insertion hole.

[0015] It is worth noting that the U-shaped seat can limit the accommodation of the fixed column and play a preliminary guiding and limiting role during the movement of the moving plate, preventing the moving plate from shifting laterally. The output shaft of the dual-axis cylinder passes through the first insertion hole and enters the second insertion hole, which can firmly lock the first positioning mechanism and the locking mechanism, preventing the moving plate from shifting during the hot pressing process, thereby ensuring the positioning stability during hot pressing, and ensuring that the transferred pattern will not have problems such as shifting or overlapping.

[0016] Preferably, the flattening and positioning mechanism includes a second pressure plate placed on the upper end of the movable plate, a fixed frame fixed to the upper end of the second pressure plate, and a magnet fixed to the inner wall of the fixed frame.

[0017] It is worth noting that the magnetic block and the first magnetic plate on the inner wall of the moving plate attract each other, which can firmly fix the second pressure plate on the moving plate, thereby flattening and positioning the substrate. This magnetic fixing method does not require mechanical contact and squeezing, which can avoid stretching deformation or fiber damage to flexible substrates. At the same time, for substrates of different thicknesses and elasticities, it is only necessary to adjust the attraction position between the magnetic block and the first magnetic plate to adapt them. The operation is simple and quick, and the adaptability to a variety of materials is improved.

[0018] Preferably, the rolling flattening assembly includes a U-shaped frame disposed above the moving plate, rollers rotatably mounted on the inner walls of both sides of the U-shaped frame, and a handle fixed to the upper end of the U-shaped frame.

[0019] It is worth noting that by pushing the roller with the handle over the surface of the substrate, wrinkles on the substrate can be quickly flattened, ensuring that the substrate is laid flat on the moving plate. This avoids blurring or deformation of the transferred pattern due to wrinkles. The rolling flattening method of the roller applies uniform force and will not cause local damage to the substrate. It is also flexible and convenient to operate and can adapt to the flattening needs of substrates of different sizes.

[0020] Preferably, the camera mechanism includes brackets fixed to both sides of the fixed frame, a controller fixed to the upper end of one of the brackets, and a camera fixed to the lower end of the bracket.

[0021] It is worth noting that the camera can capture the positioning of the printed material on the moving board in real time and transmit the image information to the controller. The controller can judge whether the positioning is accurate. This mechanism can monitor the positioning process, detect positioning deviations in a timely manner and provide feedback, eliminating the need for manual visual inspection. This improves the efficiency and accuracy of positioning detection and reduces the product defect rate caused by human judgment errors.

[0022] Preferably, the second positioning mechanism includes a hinge that is bolted to one end of the movable plate near the fixed frame and a first pressure plate that is bolted to the hinge, with the lower end of the first pressure plate and the upper end of the movable plate in contact.

[0023] It is worth noting that the hinge structure allows the first pressure plate to be flipped flexibly, making it easy to place or remove the substrate. When the first pressure plate is lowered, its lower end fits against the upper end of the moving plate, which can effectively fix the end of the substrate near the fixed frame, preventing that end from tilting or shifting during the movement of the moving plate or hot pressing, thus ensuring the overall stability of the substrate's positioning. In addition, the bolt fixing method facilitates the installation, disassembly and maintenance of the first pressure plate.

[0024] Preferably, the second positioning mechanism includes two positioning holes opened at the upper edge of the movable plate, a pressure block placed on the upper edge of the movable plate, and two limiting posts fixed to the lower end of the pressure block. The limiting posts and positioning holes are adapted to each other, and the end of the pressure block away from the fixed frame and the end of the flattening positioning mechanism close to the fixed frame can fit together.

[0025] It is worth noting that the matching of the limiting post and the positioning hole enables the precise positioning and installation of the pressure block on the moving plate. The fit between the pressure block and the flattening positioning mechanism can coordinately fix the edge of the substrate, enhancing the positioning effect of the substrate. At the same time, the placement and removal of the pressure block is simple, facilitating the quick replacement of different substrates and improving the convenience and efficiency of operation in the production process.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] 1. In terms of avoiding damage to flexible materials, the magnetic block in the flattening and positioning mechanism attracts the first magnetic plate on the inner wall of the moving plate, fixing the second pressure plate on the moving plate to achieve flattening and positioning of the substrate. This magnetic fixing method does not require mechanical contact and squeezing, and does not apply a hard force to the flexible substrate during the fixing process, thereby avoiding the stretching deformation and fiber damage of the substrate caused by mechanical positioning structure contact. The flattening and positioning mechanism can adapt to substrates of different thicknesses and elasticities by adjusting the attraction position of the magnetic block and the first magnetic plate, without having to repeatedly adjust the fixing gap as in traditional mechanical positioning. The operation is simple and quick, greatly improving the adaptability to diverse materials.

[0028] 2. In the second positioning mechanism, the hinge structure allows the first pressure plate to be flexibly flipped, making it convenient to place or remove the printing substrate. The pressure block achieves precise positioning and installation through the matching of the limiting post and the positioning hole. The pressure block and the flattening positioning mechanism fit together to fix the edge of the printing substrate. These designs make it convenient to change the printing substrate without repeated adjustments. At the same time, the U-shaped seat of the locking mechanism provides initial guidance and limitation for the fixing post. The output shaft of the dual-axis cylinder quickly passes through the first insertion hole and enters the second insertion hole, which can realize the firm locking of the first positioning mechanism and the locking mechanism, reduce the positioning adjustment time, and thus significantly improve production efficiency.

[0029] 3. In terms of positioning accuracy, the camera of the camera mechanism can capture the positioning of the substrate in real time, allowing users to easily view the edge of the substrate near the fixed frame. This ensures the positioning stability during hot pressing and prevents problems such as offset, overlap, or blurred edges in the transferred pattern, significantly improving the product qualification rate. Attached Figure Description

[0030] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0031] Figure 2 The diagram shown is a three-dimensional structural schematic of the first positioning mechanism, locking mechanism, and hot pressing mechanism of this utility model.

[0032] Figure 3The image shown is a side view of the hot press plate of this utility model;

[0033] Figure 4 The diagram shown is a three-dimensional structural schematic of the first embodiment of the second positioning mechanism of this utility model;

[0034] Figure 5 The diagram shown is a three-dimensional structural schematic of a second embodiment of the second positioning mechanism of this utility model;

[0035] Figure 6 The diagram shown is a three-dimensional structural schematic of the camera mechanism of this utility model;

[0036] Figure 7 The diagram shown is a three-dimensional structural schematic of the flattening and positioning mechanism of this utility model.

[0037] Figure 8 The diagram shown is a three-dimensional structural schematic of the rolling flattening component of this utility model.

[0038] Reference numerals: 1. Printing table; 2. Support plate; 3. First guide rail; 4. Moving plate; 41. Hinge; 42. First pressure plate; 43. Positioning hole; 44. Pressure block; 45. Limiting post; 5. First positioning mechanism; 51. Long block; 52. Fixed post; 53. L-shaped block; 6. Flattening positioning mechanism; 61. Second pressure plate; 62. Fixed frame; 63. Magnet block; 7. Rolling flattening assembly; 71. U-shaped frame; 72. Roller; 73. Handle; 8. Fixed frame; 81. Support; 82. Controller; 83. Camera; 9. Hot pressing mechanism; 91. Hydraulic cylinder; 92. Second guide rail; 93. Slider; 94. Connecting block; 95. Weight block; 96. Hot pressing plate; 10. First magnet plate; 11. Guide block; 12. U-shaped seat; 13. Dual-axis cylinder; 14. Limiting body. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] To address the problems in existing heat transfer processes where mechanical positioning structures can easily lead to positioning datum misalignment, material damage, poor adaptability, and cumbersome operation, thus impacting production efficiency, the following technical solution is proposed. Please refer to [link / reference]. Figure 1-5 ;

[0041] A printing platform positioning device includes a printing table 1, a support plate 2 fixed to the upper end of the printing table 1, two first guide rails 3 fixed to the upper end of the support plate 2, guide blocks 11 slidably disposed on the side wall of the first guide rails 3, a movable plate 4 fixed to the upper end of the two guide blocks 11, a first positioning mechanism 5 fixed to the upper end of the movable plate 4, two flattening positioning mechanisms 6 placed on the upper end of the movable plate 4, a rolling flattening assembly 7 disposed on the upper end of the movable plate 4, a fixed frame 8 disposed on one side of the printing table 1, and a hot pressing mechanism 9 disposed on the fixed frame 8 for hot pressing. A first magnet plate 10 is fixedly connected to the inner wall of the movable plate 4.

[0042] The camera mechanism is mounted on the mounting bracket 8;

[0043] The hot pressing mechanism 9 is equipped with a locking mechanism for locking the first positioning mechanism 5;

[0044] The movable plate 4 is equipped with a second positioning mechanism.

[0045] In use, place the substrate on the upper end of the moving plate 4, use the rolling flattening component 7 to roll the substrate flat, or use the hand-held flattening positioning mechanism 6 to scrape the substrate flat. Then remove the rolling flattening component 7, press the two flattening positioning mechanisms 6 on the two sides of the substrate respectively, and then use the second positioning mechanism to press and position one end of the substrate. Then place the heat transfer paper on the substrate. The end of the first positioning mechanism 5 near the fixed frame 8 can also position the substrate. Manually push the moving plate 4 to position it under the hot pressing mechanism 9. Turn on the hot pressing mechanism 9 to print the pattern on the heat transfer paper onto the substrate.

[0046] In this embodiment, specifically: the hot pressing mechanism 9 includes a hydraulic cylinder 91 and a second guide rail 92 fixed to one end of the fixed frame 8 near the printing table 1, a slider 93 slidably disposed on the side wall of the second guide rail 92, a connecting block 94 fixed to one end of the slider 93 near the printing table 1, a weight 95 fixed to the connecting block 94, and a hot pressing plate 96 fixed to the lower end of the weight 95. The lower end of the output shaft of the hydraulic cylinder 91 is fixed to the upper end of the connecting block 94.

[0047] In this embodiment, specifically: the first positioning mechanism 5 includes a long block 51 fixed to the upper edge of the movable plate 4, two fixed posts 52 fixed to the upper end of the long block 51, and an L-shaped block 53 fixed to the center of the upper end of the long block 51. Two first insertion holes are opened through one side of the L-shaped block 53.

[0048] In this embodiment, specifically: the locking mechanism includes a U-shaped seat 12, a dual-axis cylinder 13 and a limiting body 14. Two U-shaped seats 12, dual-axis cylinders 13 and limiting bodies 14 are fixedly connected to one end of the weight 95 away from the fixed frame 8. When the moving plate 4 moves toward the fixed frame 8, the fixed column 52 moves to the inner wall of the U-shaped seat 12. Two second insertion holes are opened through one side of the limiting body 14. The two output shafts of the dual-axis cylinder 13 can pass through the first insertion hole and move to the inner wall of the second insertion hole.

[0049] In this embodiment, specifically: the flattening and positioning mechanism 6 includes a second pressure plate 61 placed on the upper end of the movable plate 4, a fixed frame 62 fixed to the upper end of the second pressure plate 61, and a magnetic block 63 fixed to the inner wall of the fixed frame 62.

[0050] In this embodiment, specifically: the rolling flattening assembly 7 includes a U-shaped frame 71 disposed above the moving plate 4, rollers 72 rotatably mounted on the inner walls of both sides of the U-shaped frame 71, and a handle 73 fixed to the upper end of the U-shaped frame 71.

[0051] In this embodiment, the camera mechanism specifically includes brackets 81 fixed to both sides of the fixed frame 8, a controller 82 fixed to the upper end of one of the brackets 81, and a camera 83 fixed to the lower end of the bracket 81.

[0052] Example 1: In this example, specifically: the second positioning mechanism includes a hinge 41 fixedly mounted to one end of the movable plate 4 near the fixed frame 8 by bolts, and a first pressure plate 42 fixed to the hinge 41 by bolts. The lower end of the first pressure plate 42 is attached to the upper end of the movable plate 4. The hinge 41 allows the first pressure plate 42 to be flexibly flipped, making it convenient to place or remove the substrate. The attachment of the first pressure plate 42 to the movable plate 4 can effectively fix one edge of the substrate. When changing the substrate, the operation is convenient and there is no need for repeated adjustments.

[0053] Example 2: In this example, specifically: the second positioning mechanism includes two positioning holes 43 opened at the upper edge of the moving plate 4, a pressure block 44 placed on the upper end of the moving plate 4, and two limiting posts 45 fixed to the lower end of the pressure block 44. The limiting posts 45 and the positioning holes 43 are adapted to each other. The end of the pressure block 44 away from the fixed frame 8 and the end of the flattening positioning mechanism 6 near the fixed frame 8 can be fitted together. The adaptation of the positioning holes 43 and the limiting posts 45 enables the pressure block 44 to achieve precise positioning and installation. The fitting of the pressure block 44 and the flattening positioning mechanism 6 can work together to fix the edge of the substrate. When changing the substrate, the operation is convenient and there is no need for repeated adjustments, which is conducive to improving production efficiency. Compared with the first pressure plate 42 in Example 1, the advantage of this insertion placement is that one edge of the substrate can extend through the pressure block 44 to the outside of the moving plate 4, which is suitable for the stable placement of substrates with greater length.

[0054] Working principle: First, place the substrate to be printed on the upper surface of the moving plate 4. By holding the handle 73 of the rolling flattening component 7, the U-shaped frame 71 drives the roller 72 to roll on the surface of the substrate to achieve initial flattening. Alternatively, you can hold the fixed frame 62 of the flattening positioning mechanism 6 to drive the second pressure plate 61 to scrape the surface of the substrate.

[0055] After flattening is completed, remove the rolling flattening component 7, place the two flattening positioning mechanisms 6 on the two sides of the substrate respectively, and use the adsorption force between the magnet block 63 on the inner wall of the fixed frame 62 and the first magnet plate 10 on the inner wall of the moving plate 4 to make the second pressure plate 61 press tightly against the two sides of the substrate to achieve fixation; then operate according to the different structures of the second positioning mechanism.

[0056] If it is the structure of Embodiment 1, the first pressure plate 42 is flipped by hinge 41 so that its lower end is attached to the upper end surface of the moving plate 4, thereby pressing the edge of the substrate near the fixed frame 8.

[0057] If it is the structure of Embodiment 2, the limiting post 45 at the lower end of the pressure block 44 is aligned with the positioning hole 43 on the moving plate 4 and inserted, so that the pressure block 44 is in contact with the end of the flattening positioning mechanism 6 near the fixed frame 8, and the edge of the substrate is fixed together. For substrates with a large length, one end can be made to pass through the pressure block 44 and extend to the outside of the moving plate 4.

[0058] Next, the heat transfer paper is placed on the printing area of ​​the substrate, and the long block 51 and L-shaped block 53 of the first positioning mechanism 5 are used to assist in positioning the end of the substrate near the fixing frame 8.

[0059] Then, manually push the moving plate 4 so that the guide block 11 slides along the first guide rail 3 to directly below the hot pressing mechanism 9. At this time, the fixing column 52 of the first positioning mechanism 5 enters the inner wall of the U-shaped seat 12 of the locking mechanism on the hot pressing mechanism 9 to achieve preliminary guiding and limiting.

[0060] The controller 82 opens the dual-axis cylinder 13 of the locking mechanism, so that its output shaft passes through the first insertion hole on the L-shaped block 53 and is inserted into the second insertion hole on the limit body 14, thus completing the secure locking of the first positioning mechanism 5 and the locking mechanism. At the same time, the controller 82 opens the camera 83 at the lower end of the brackets 81 on both sides of the fixed frame 8. The camera 83 is connected to a mobile phone or computer via Bluetooth to capture the positioning of the substrate in real time for the staff to watch, so as to facilitate the monitoring of positioning accuracy.

[0061] After confirming that the substrate is accurately positioned, the hydraulic cylinder 91 of the hot pressing mechanism 9 is activated by the controller 82, so that its output shaft pushes the connecting block 94 to drive the slider 93 to slide down along the second guide rail 92, thereby causing the hot pressing plate 96 at the lower end of the weight block 95 to descend and contact the heat transfer paper. The pattern on the heat transfer paper is transferred to the surface of the substrate by the heat and pressure of the hot pressing plate 96.

[0062] After the transfer is completed, the controller 82 controls the hydraulic cylinder 91 to drive the hot plate 96 to reset, controls the output shaft of the dual-axis cylinder 13 to retract and unlock, manually pulls the moving plate 4 to reset it along the first guide rail 3, and finally removes the second positioning mechanism and the flattening positioning mechanism 6 respectively, and takes out the printed substrate.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A printing platform positioning device, characterized in that: It includes a printing table (1), a support plate (2) fixed to the upper end of the printing table (1), two first guide rails (3) fixed to the upper end of the support plate (2), guide blocks (11) slidably disposed on the side wall of the first guide rails (3), a movable plate (4) fixed to the upper end of the two guide blocks (11), a first positioning mechanism (5) fixed to the upper end of the movable plate (4), two flattening positioning mechanisms (6) placed on the upper end of the movable plate (4), a rolling flattening assembly (7) disposed on the upper end of the movable plate (4), a fixed frame (8) disposed on one side of the printing table (1), and a hot pressing mechanism (9) disposed on the fixed frame (8) for hot pressing. A first magnet plate (10) is fixed to the inner wall of the movable plate (4). The camera mechanism is mounted on the mounting bracket (8); The hot pressing mechanism (9) is provided with a locking mechanism for locking the first positioning mechanism (5); The movable plate (4) is equipped with a second positioning mechanism.

2. The printing platform positioning device according to claim 1, characterized in that: The hot pressing mechanism (9) includes a hydraulic cylinder (91) fixed to one end of the fixed frame (8) near the printing table (1), a second guide rail (92), a slider (93) slidably disposed on the side wall of the second guide rail (92), a connecting block (94) fixed to one end of the slider (93) near the printing table (1), a weight (95) fixed to the connecting block (94), and a hot pressing plate (96) fixed to the lower end of the weight (95). The lower end of the output shaft of the hydraulic cylinder (91) is fixed to the upper end of the connecting block (94).

3. The printing platform positioning device according to claim 2, characterized in that: The first positioning mechanism (5) includes a long block (51) fixed to the upper edge of the movable plate (4), two fixed posts (52) fixed to the upper end of the long block (51), and an L-shaped block (53) fixed to the center of the upper end of the long block (51). Two first insertion holes are opened through one side of the L-shaped block (53).

4. A printing platform positioning device according to claim 3, characterized in that: The locking mechanism includes a U-shaped seat (12), a dual-axis cylinder (13), and a limiting body (14). Two U-shaped seats (12), dual-axis cylinders (13), and limiting bodies (14) are fixedly connected to one end of the weight (95) away from the fixed frame (8). When the moving plate (4) moves toward the fixed frame (8), the fixed column (52) moves to the inner wall of the U-shaped seat (12). Two second insertion holes are opened through one side of the limiting body (14). The two output shafts of the dual-axis cylinder (13) can pass through the first insertion hole and move to the inner wall of the second insertion hole.

5. A printing platform positioning device according to claim 1, characterized in that: The flattening and positioning mechanism (6) includes a second pressure plate (61) placed on the upper end of the movable plate (4), a fixed frame (62) fixed to the upper end of the second pressure plate (61), and a magnet block (63) fixed to the inner wall of the fixed frame (62).

6. A printing platform positioning device according to claim 1, characterized in that: The rolling flattening assembly (7) includes a U-shaped frame (71) disposed above the movable plate (4), rollers (72) rotatably mounted on the inner walls of both sides of the U-shaped frame (71), and a handle (73) fixed to the upper end of the U-shaped frame (71).

7. A printing platform positioning device according to claim 1, characterized in that: The camera assembly includes brackets (81) fixed to both sides of the mounting frame (8), a controller (82) fixed to the upper end of one of the brackets (81), and a camera (83) fixed to the lower end of the bracket (81).

8. A printing platform positioning device according to claim 1, characterized in that: The second positioning mechanism includes a hinge (41) that is fixedly installed on the movable plate (4) near the fixed frame (8) by bolts and a first pressure plate (42) that is fixed on the hinge (41) by bolts. The lower end of the first pressure plate (42) is attached to the upper end of the movable plate (4).

9. A printing platform positioning device according to claim 1, characterized in that: The second positioning mechanism includes two positioning holes (43) opened at the upper edge of the moving plate (4), a pressure block (44) placed on the upper end of the moving plate (4), and two limiting posts (45) fixed to the lower end of the pressure block (44). The limiting posts (45) and the positioning holes (43) are adapted to each other. The end of the pressure block (44) away from the fixed frame (8) and the end of the flattening positioning mechanism (6) close to the fixed frame (8) can fit together.

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