Large-size sheet full-automatic feeding and discharging high-precision printing machine

Abstract

The utility model provides a full-automatic feeding and discharging high-precision printing machine for large-size sheets, which is characterized in that a printing platform is connected with an output end at the top of a linear driving module, the printing platform comprises a positioning position and a printing position on a moving track, and a feeding platform and a discharging platform are respectively positioned on two sides of the printing platform at the positioning position; the feeding platform and the discharging platform are located in the direction perpendicular to the moving track of the printing platform, the photographing and positioning system is located above the printing platform at the positioning position and comprises at least three positioning cameras, the positioning cameras are used for photographing the corners of a sheet, and the printing module is located above the printing platform at the printing position and used for printing the sheet. And the conveying manipulator mechanism is movably arranged above the feeding platform, the printing platform at the positioning position and the discharging platform. The positioning cameras are arranged to photograph and position a plurality of corners of the sheet, positioning and feeding of the large-size sheet can be achieved, safety and high efficiency are achieved, and positioning and placing precision is high.

Description

Technical Field

[0001] This utility model relates to the field of printing presses, and in particular to a high-precision printing press for fully automatic loading and unloading of large-size sheets. Background Technology

[0002] A printing press is an industrial device used for high-precision printing of patterns on flat sheets. Its applications are very wide, including advertising signage, appliance panels, architectural decoration, and automotive interiors. Currently, for printing large-size sheets with a diagonal greater than 100 inches, manual loading and unloading is still the most common method. This is labor-intensive, poses a high risk of mechanical injury to operators, easily scratches the sheets, and results in low efficiency and poor accuracy in loading and unloading.

[0003] Therefore, there is a need to provide a high-precision printing machine with fully automatic loading and unloading of large-size sheets to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a high-precision printing machine for large-size sheet materials with fully automatic loading and unloading, which solves the problems of manual loading and unloading in existing printing machines, such as high workload, high safety risks, low efficiency, and poor precision.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a high-precision printing machine for fully automatic loading and unloading of large-size sheets, used for loading, unloading and printing of sheets, comprising: a loading platform, a conveying robot mechanism, a printing platform, a linear drive module, a photo positioning system, a printing module, and an unloading platform;

[0006] The printing platform is connected to the output end at the top of the linear drive module. The printing platform has a positioning position and a printing position on its movement trajectory. The loading platform and the unloading platform are respectively located on both sides of the printing platform at the positioning position. The loading platform and the unloading platform are located in a direction perpendicular to the movement trajectory of the printing platform. The photo positioning system is located above the printing platform at the positioning position. The photo positioning system includes at least three positioning cameras. The positioning cameras are used to photograph the corners of the sheet. The printing module is located above the printing platform at the printing position. The conveying robot mechanism is movably arranged above the loading platform, the printing platform at the positioning position, and the unloading platform.

[0007] In this utility model, the high-precision printing machine for fully automatic loading and unloading of large-size sheets also includes a mounting frame. The mounting frame is set above the printing platform at the positioning position. The mounting frame includes four columns and a frame component set on the top of the four columns. Multiple vertical rods are arranged inside the frame component.

[0008] The photo positioning system also includes an XY motion module, a connecting frame, and a ring light source. The XY motion module is fixedly connected to the vertical rod. One end of the connecting frame is connected to the output end of the XY motion module, and the other end of the connecting frame is connected to the positioning camera and the ring light source. The ring light source is located between the positioning camera and the printing platform. The trajectory of the XY motion module driving the connecting frame to move is parallel to the printing platform.

[0009] The photo positioning system includes four positioning cameras, which are used to photograph the four corners of the sheet.

[0010] The photo positioning system also includes a fine-tuning mechanism, which includes a fixed plate, a sliding plate, a mounting plate, and a threaded adjustment rod.

[0011] The fixed plate is fixedly connected to the connecting frame, and the sliding plate is elastically slidably connected to the fixed plate through an elastic element. A protrusion is provided on one side of the fixed plate, and the threaded adjusting rod passes through the protrusion and forms a threaded connection. A pressure block is provided on one side of the sliding plate, and one end of the threaded adjusting rod contacts the pressure block. The pressing direction of the threaded adjusting rod on the pressure block is opposite to the elastic driving direction of the elastic element and is perpendicular to the printing platform.

[0012] The sliding plate has a groove on one side, and the extension direction of the groove is perpendicular to the printing platform. The mounting plate includes a first plate and a second plate. A slider for sliding connection with the groove is provided on one side of the second plate. The opposite side of the second plate cooperates with the first plate to clamp the positioning camera. A screw passes through the first plate and is threadedly connected to the second plate, and the screw passes through the second plate and forms a compression with the sliding plate.

[0013] In addition, the frame is provided with a crossbar perpendicular to the longitudinal bar. The mounting frame also includes an extension frame for mounting the conveying robot mechanism. The extension frame is connected to the lower part of the crossbar by a connecting rod. The two ends of the extension frame extend above the loading platform and the unloading platform, respectively. All four positioning cameras are located on the same side of the extension frame.

[0014] Furthermore, both sides of the frame are fixedly connected to the extension frame via reinforcing rods.

[0015] In this utility model, the conveying robot mechanism includes a loading gripper assembly and a unloading gripper assembly. Both the loading gripper assembly and the unloading gripper assembly are slidably mounted on the extension frame. A belt is fixedly mounted on the extension frame. One end of each loading gripper assembly and the unloading gripper assembly is provided with a motor, a tensioning wheel, and a pulley connected to the output end of the motor. Tensioning wheels are provided on both sides of the pulley. The belt passes over the tensioning wheels of both the loading gripper assembly and the unloading gripper assembly and is connected to the pulley for transmission.

[0016] The feeding gripper assembly includes a feeding lifting frame, a feeding main mounting rod, a feeding support rod, a cylinder, and a feeding suction cup claw;

[0017] The main loading rod is connected to the bottom of the loading lifting frame. Multiple loading support rods are arranged parallel to the bottom of the main loading rod. The loading support rods are perpendicular to the main loading rod. The two outermost loading support rods are equipped with cylinders at both ends. The output end of the cylinders is connected to the loading suction cup claws. Multiple loading suction cup claws are also provided on the loading support rods.

[0018] In addition, the unloading gripper assembly includes an unloading lifting frame, an unloading main mounting rod, an unloading support rod, and an unloading suction cup claw;

[0019] The main unloading mounting rod is connected to the bottom of the unloading lifting frame. Multiple unloading support rods are arranged parallel to the bottom of the main unloading mounting rod. The unloading support rods are perpendicular to the main unloading mounting rod, and multiple unloading suction cup claws are provided on the unloading support rods.

[0020] In this invention, the printing platform includes an XYR alignment adjustment module and a platform plate connected to the output end of the XYR alignment adjustment module.

[0021] In this utility model, an X-axis positioning rod and a Y-axis positioning rod are provided through the upper part of the feeding platform. The X-axis positioning rod and the Y-axis positioning rod are slidably arranged along a plane parallel to the feeding platform. The sliding directions of the X-axis positioning rod and the Y-axis positioning rod are perpendicular. Multiple stacked sheets are positioned between multiple X-axis positioning rods and multiple Y-axis positioning rods. The unloading platform is a curing device.

[0022] Compared with the prior art, the advantages of this utility model are as follows: The high-precision printing machine for fully automatic loading and unloading of large-size sheets of this utility model can achieve positioning and loading of large-size sheets by setting multiple positioning cameras to take pictures and position multiple corners of the sheet, which is safe, efficient and has high positioning accuracy.

[0023] Multiple positioning cameras can be moved by the XY motion module and their positions can be adjusted by a fine-tuning mechanism, which improves the applicability and compatibility of positioning and taking pictures.

[0024] In addition, the feeding gripper assembly sets some of the feeding suction cups on the output end of the cylinder and some on the feeding support rod. This allows the cylinder to extend and press down on the sheet before gripping it, making the sheet flatter. Then, all the feeding suction cups suck up the sheet and transport it, resulting in more stable gripping and high accuracy in transport and placement. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0026] Figure 1 This is a schematic diagram of a preferred embodiment of the high-precision printing machine for fully automatic loading and unloading of large-size sheets according to the present invention.

[0027] Figure 2 This is a schematic diagram of the mounting frame and conveying robot mechanism of the high-precision printing machine for fully automatic loading and unloading of large-size sheets according to this utility model.

[0028] Figure 3 for Figure 2 Enlarged view of the structure of the material feeding gripper component.

[0029] Figure 4 This is a schematic diagram of the photographic positioning system for a high-precision printing machine with fully automatic loading and unloading of large-size sheets, according to this utility model.

[0030] Figure 5 This is a schematic diagram of the fine-tuning mechanism of the high-precision printing machine for fully automatic loading and unloading of large-size sheets according to this utility model.

[0031] Figure 6 This is a schematic diagram of the tension wheel and pulley of the high-precision printing machine for fully automatic loading and unloading of large-size sheets according to this utility model. Detailed Implementation

[0032] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0034] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In existing technologies, large-size sheet printing production generally still adopts manual loading and unloading operations, which is labor-intensive, poses a high risk of mechanical injury to operators, and has low work efficiency and poor accuracy in loading and unloading.

[0037] The following is a preferred embodiment of a high-precision printing machine for fully automatic loading and unloading of large-size sheets, which can solve the above-mentioned technical problems provided by this utility model.

[0038] Please refer to Figure 1 In the diagram, units with similar structures are represented by the same labels.

[0039] This embodiment provides a high-precision printing machine for fully automated loading and unloading of large-size sheets, used for loading, unloading, and printing on sheets. It includes: a loading platform 11, a conveying robot mechanism 12, a printing platform 13, a linear drive module 14, a photographic positioning system 15, a printing module 16, and an unloading platform. It should be noted that the unloading platform can be a curing device for subsequent processing, such as a UV curing machine or a drying tunnel oven, used for surface drying of the printed sheets.

[0040] The printing platform 13 is connected to the output end of the top of the linear drive module 14. The linear drive module 14 drives the printing platform 13 to move. The printing platform 13 has a positioning position and a printing position on the moving trajectory.

[0041] The loading platform 11 and unloading platform are located on either side of the printing platform 13 at the positioning position, and are positioned perpendicular to the moving trajectory of the printing platform 13. The photo-positioning system 15 is located above the printing platform 13 at the positioning position. The photo-positioning system 15 includes at least three positioning cameras 151, which are used to photograph the corners of the sheet material to achieve high-precision positioning and loading of large-sized sheets. The printing module 16 is located above the printing platform 13 at the printing position. The printing module 16 includes a screen printing plate and a squeegee movably disposed above the screen printing plate. The screen printing plate descends and presses against the printing platform 13 at the printing position, and the squeegee moves across the screen printing plate to spread the printing ink through the mesh of the screen printing plate onto the sheet material on the printing platform 13.

[0042] The conveying robot mechanism 12 is movably mounted above the loading platform 11, the printing platform 13 at the positioning position, and the unloading platform. The conveying robot mechanism 12 is used to pick up the sheet material on the loading platform 11 and put it onto the printing platform 13, and to pick up the printed sheet material on the printing platform 13 and put it onto the unloading platform.

[0043] Please refer to Figure 2 In this embodiment, the high-precision printing machine for fully automatic loading and unloading of large-size sheets also includes a mounting frame 17. The mounting frame 17 is set above the printing platform 13 at the positioning position. The mounting frame 17 includes four columns 171 and a frame component 172 set on the top of the four columns 171. Multiple longitudinal bars 173 are provided inside the frame component 172, and the structure is stable.

[0044] Please refer to Figure 4 The photo positioning system 15 in this embodiment also includes an XY moving module 152, a connecting frame 153, and a ring light source 154. It should be noted that the XY moving module 152 may be composed of, but is not limited to, two sets of motor lead screw modules or two sets of linear motors. The XY moving module 152 is used to drive the positioning camera 151 to move along a plane parallel to the printing platform 13 to adjust the shooting position of the positioning camera 151 so as to be suitable for shooting sheets of different sizes, thereby improving the applicability and compatibility of the positioning camera for taking pictures.

[0045] The XY motion module 152 is fixedly connected to the longitudinal rod 173. One end of the connecting frame 153 is connected to the output end of the XY motion module 152, and the other end of the connecting frame 153 is connected to the positioning camera 151 and the ring light source 154. The ring light source 154 is located between the positioning camera 151 and the printing platform 13, and the ring light source 154 makes the images taken by the positioning camera 151 clearer. The trajectory of the XY motion module 152 driving the connecting frame 153 to move is parallel to the printing platform 13.

[0046] Specifically, the photo positioning system 15 in this embodiment includes four positioning cameras 151, which are used to photograph the four corners of the sheet.

[0047] Please refer to Figure 5 The photo positioning system 15 also includes a fine-tuning mechanism 155, which includes a fixed plate 1551, a sliding plate 1552, a mounting plate, and a threaded adjustment rod 1555.

[0048] The fixed plate 1551 is fixedly connected to the connecting frame 153. The sliding plate 1552 is elastically slidably connected to the fixed plate 1551 through an elastic element. A protrusion 1556 is provided on one side of the fixed plate 1551. A threaded adjusting rod 1555 passes through the protrusion 1556 and forms a threaded connection. A pressure block 1557 is provided on one side of the sliding plate 1552. One end of the threaded adjusting rod 1555 contacts the pressure block 1557. The pressing direction of the threaded adjusting rod 1555 on the pressure block 1557 is opposite to the elastic driving direction of the elastic element and is perpendicular to the printing platform 13. In this way, by turning the threaded adjusting rod 1555, the threaded adjusting rod 1555 drives the sliding plate 1552 to move by pressing the pressure block 1557, thereby adjusting the position of the sliding plate 1552 relative to the fixed plate 1551 and changing the shooting distance and shooting range of the positioning camera 151.

[0049] A groove 15531 for connecting the mounting plate can be directly provided on one side of the sliding plate 1552. Since the sliding connection structure between the sliding plate 1552 and the fixed plate 1551 is not easily changed, while the connecting plate 1553 is easily replaceable, it is also possible to... Figure 5 As shown, a connecting plate 1553 is also provided on one side of the sliding plate 1552, and a groove 15531 is provided on one side of the connecting plate 1553.

[0050] The extension direction of the slide groove 15531 is perpendicular to the printing platform 13. The mounting plate includes a first plate 15541 and a second plate 15542. One side of the second plate 15542 is provided with a slider for sliding connection with the slide groove 15531. The opposite side of the second plate 15542 cooperates with the first plate 15541 to clamp the positioning camera 151. A screw 15543 passes through the first plate 15541 and is threadedly connected to the second plate 15542. The screw 15543 also penetrates the second plate 15542 and forms a compression with the slider 1552, so that the slider is tightly engaged with the slide groove 15531.

[0051] In this way, the screws 15543 can both clamp the first plate 15541 and the second plate 15542 to secure the positioning camera 151, and also fix the connection between the second plate 15542 and the connecting plate 1553, making the installation and connection more convenient. The sliding connection between the second plate 15542 and the slide groove 15531 allows for a larger adjustment of the shooting distance and shooting range of the positioning camera 151.

[0052] Please refer to Figure 2 In addition, the frame 172 is provided with a crossbar 174 perpendicular to the longitudinal bar 173. The mounting frame 17 also includes an extension frame 175 for setting the conveying robot mechanism 12. The extension frame 175 is connected to the lower part of the crossbar 174 by a connecting rod 176. The two ends of the extension frame 175 extend above the loading platform 11 and the unloading platform, respectively. The four positioning cameras 151 are all located on the same side of the extension frame 175.

[0053] Furthermore, both sides of the frame 172 are fixedly connected to the extension frame 175 by reinforcing rods 177, making the connection structure between the extension frame 175 and the frame 172 more stable and able to support the movement of the conveying robot mechanism 12 well.

[0054] Please refer to Figure 6 In this embodiment, the conveying robot arm mechanism 12 includes a loading gripper assembly 121 and a unloading gripper assembly 122. Both the loading gripper assembly 121 and the unloading gripper assembly 122 are slidably mounted on the extension frame 175, forming a symmetrical structure with balanced force and stable operation.

[0055] Specifically, a belt is fixedly mounted on the extension frame 175, with both ends of the belt fixedly connected to the extension frame 175 via fasteners 126. One end of both the loading gripper assembly 121 and the unloading gripper assembly 122 is equipped with a motor 123, a tensioning pulley 125, and a pulley 124 connected to the output end of the motor 123. Tensioning pulleys 125 are located on both sides of the pulley 124. The belt simultaneously passes over the tensioning pulleys 125 of both the loading gripper assembly 121 and the unloading gripper assembly 122 and is connected to the pulley 124 for transmission. The motor 123 drives the pulley 124, and through the transmission between the pulley 124 and the belt, the loading gripper assembly 121 and the unloading gripper assembly 122 can move relative to the extension frame 175.

[0056] Please refer to Figure 3 The feeding gripper assembly 121 includes a feeding lifting frame 1211, a feeding main mounting rod 1212, a feeding support rod 1213, a cylinder 1215, and a feeding suction cup claw 1214.

[0057] The main loading rod 1212 is connected to the bottom of the loading lifting frame 1211. Multiple loading support rods 1213 are arranged parallel to the bottom of the main loading rod 1212. The loading support rods 1213 are perpendicular to the main loading rod 1212. The two outermost loading support rods 1213 are equipped with cylinders 1215 at both ends. The output end of the cylinders 1215 is connected to the loading suction cup claws 1214. Multiple loading suction cup claws 1214 are also provided on the loading support rods 1213.

[0058] In this way, some of the feeding suction cup claws 1214 are set at the output end of the cylinder 1215, and some of the feeding suction cup claws 1214 are set on the feeding support rod 1213. Before gripping the sheet, the cylinder 1215 can extend to press down on the sheet, making the sheet flatter. Then, all the feeding suction cup claws 1214 suck up, grip, and convey the sheet, making the gripping more stable and the conveying and placement more accurate.

[0059] Please refer to Figure 2 In addition, the unloading gripper assembly 122 includes an unloading lifting frame 1221, an unloading main mounting rod 1222, an unloading support rod 1223, and an unloading suction cup claw 1224.

[0060] The main unloading mounting rod 1222 is connected to the bottom of the unloading lifting frame 1221. Multiple unloading support rods 1223 are arranged in parallel at the bottom of the main unloading mounting rod 1222. The unloading support rods 1223 are perpendicular to the main unloading mounting rod 1222. Multiple unloading suction cup claws 1224 are provided on the unloading support rods 1223.

[0061] In this embodiment, the printing platform 13 includes an XYR alignment adjustment module and a platform plate connected to the output end of the XYR alignment adjustment module. The XYR alignment adjustment module is a conventional module structure capable of X-axis movement, Y-axis movement, and rotation in the XY plane, which will not be described in detail here. After the image positioning system 15 takes an image and positions the material, the controller analyzes the image information and controls the XYR alignment adjustment module to move or rotate the platform plate, adjusting the sheet to the required orientation.

[0062] In this embodiment, an X-axis positioning rod 111 and a Y-axis positioning rod 112 are provided through the upper part of the feeding platform 11. The X-axis positioning rod 111 and the Y-axis positioning rod 112 are slidably arranged along a plane parallel to the feeding platform 11, and the sliding directions of the X-axis positioning rod 111 and the Y-axis positioning rod 112 are perpendicular. Multiple stacked sheets are positioned between the multiple X-axis positioning rods 111 and the multiple Y-axis positioning rods 112. The X-axis positioning rods 111 and the Y-axis positioning rods 112 can position sheets of different sizes by moving, so that the feeding gripper assembly 121 can stably grip and transport them.

[0063] This preferred embodiment of the high-precision printing machine for fully automatic loading and unloading of large-size sheets uses multiple positioning cameras to photograph and position multiple corners of the sheet, enabling the positioning and loading of large-size sheets safely, efficiently, and with high positioning accuracy.

[0064] Multiple positioning cameras can be moved by the XY motion module and their positions can be adjusted by a fine-tuning mechanism, which improves the applicability and compatibility of positioning and taking pictures.

[0065] In addition, the feeding gripper assembly sets some of the feeding suction cups on the output end of the cylinder and some on the feeding support rod. This allows the cylinder to extend and press down on the sheet before gripping it, making the sheet flatter. Then, all the feeding suction cups suck up the sheet and transport it, resulting in more stable gripping and high accuracy in transport and placement.

[0066] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A high-precision printing machine for fully automatic loading and unloading of large-size sheets, used for loading, unloading, and printing on sheets, characterized in that... include: The system includes a loading platform, a conveying robot mechanism, a printing platform, a linear drive module, a photo positioning system, a printing module, and an unloading platform. The printing platform is connected to the output end at the top of the linear drive module. The printing platform has a positioning position and a printing position on its movement trajectory. The loading platform and the unloading platform are respectively located on both sides of the printing platform at the positioning position. The loading platform and the unloading platform are located in a direction perpendicular to the movement trajectory of the printing platform. The photo positioning system is located above the printing platform at the positioning position. The photo positioning system includes at least three positioning cameras. The positioning cameras are used to photograph the corners of the sheet. The printing module is located above the printing platform at the printing position. The conveying robot mechanism is movably arranged above the loading platform, the printing platform at the positioning position, and the unloading platform.

2. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 1, characterized in that, The high-precision printing machine for large-size sheet fully automatic loading and unloading also includes a mounting frame, which is set above the printing platform at the positioning position. The mounting frame includes four columns and a frame component set on the top of the four columns. Multiple vertical rods are arranged inside the frame component. The photo positioning system also includes an XY motion module, a connecting frame, and a ring light source. The XY motion module is fixedly connected to the vertical rod. One end of the connecting frame is connected to the output end of the XY motion module, and the other end of the connecting frame is connected to the positioning camera and the ring light source. The ring light source is located between the positioning camera and the printing platform. The trajectory of the XY motion module driving the connecting frame to move is parallel to the printing platform. The photo positioning system includes four positioning cameras, which are used to photograph the four corners of the sheet.

3. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 2, characterized in that, The photo positioning system also includes a fine-tuning mechanism, which includes a fixed plate, a sliding plate, a mounting plate, and a threaded adjustment rod. The fixed plate is fixedly connected to the connecting frame, and the sliding plate is elastically slidably connected to the fixed plate through an elastic element. A protrusion is provided on one side of the fixed plate, and the threaded adjusting rod passes through the protrusion and forms a threaded connection. A pressure block is provided on one side of the sliding plate, and one end of the threaded adjusting rod contacts the pressure block. The pressing direction of the threaded adjusting rod on the pressure block is opposite to the elastic driving direction of the elastic element and is perpendicular to the printing platform. The sliding plate has a groove on one side, and the extension direction of the groove is perpendicular to the printing platform. The mounting plate includes a first plate and a second plate. A slider for sliding connection with the groove is provided on one side of the second plate. The opposite side of the second plate cooperates with the first plate to clamp the positioning camera. A screw passes through the first plate and is threadedly connected to the second plate, and the screw passes through the second plate and forms a compression with the sliding plate.

4. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 2, characterized in that, The frame component is also provided with a crossbar perpendicular to the longitudinal bar. The mounting frame also includes an extension frame for mounting the conveying robot mechanism. The extension frame is connected to the lower part of the crossbar by a connecting rod. The two ends of the extension frame extend above the loading platform and the unloading platform, respectively. All four positioning cameras are located on the same side of the extension frame.

5. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 4, characterized in that, Both sides of the frame are fixedly connected to the extension frame by reinforcing rods.

6. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 4, characterized in that, The conveying robot mechanism includes a loading gripper assembly and a unloading gripper assembly. Both the loading gripper assembly and the unloading gripper assembly are slidably mounted on the extension frame. A belt is fixedly mounted on the extension frame. One end of each loading gripper assembly and the unloading gripper assembly is provided with a motor, a tensioning wheel, and a pulley connected to the output end of the motor. Tensioning wheels are provided on both sides of each pulley. The belt passes over the tensioning wheels of both the loading gripper assembly and the unloading gripper assembly and is connected to the pulleys for transmission.

7. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 6, characterized in that, The loading gripper assembly includes a loading lifting frame, a loading main mounting rod, a loading support rod, a cylinder, and a loading suction cup claw; The main loading rod is connected to the bottom of the loading lifting frame. Multiple loading support rods are arranged parallel to the bottom of the main loading rod. The loading support rods are perpendicular to the main loading rod. The two outermost loading support rods are equipped with cylinders at both ends. The output end of the cylinders is connected to the loading suction cup claws. Multiple loading suction cup claws are also provided on the loading support rods.

8. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 6, characterized in that, The material unloading gripper assembly includes a material unloading lifting frame, a main material unloading mounting rod, a material unloading support rod, and a material unloading suction cup claw; The main unloading mounting rod is connected to the bottom of the unloading lifting frame. Multiple unloading support rods are arranged parallel to the bottom of the main unloading mounting rod. The unloading support rods are perpendicular to the main unloading mounting rod, and multiple unloading suction cup claws are provided on the unloading support rods.

9. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 1, characterized in that, The printing platform includes an XYR alignment adjustment module and a platform plate connected to the output end of the XYR alignment adjustment module.

10. The high-precision printing machine for fully automatic loading and unloading of large-size sheets according to claim 1, characterized in that, The loading platform is provided with an X-axis positioning rod and a Y-axis positioning rod, which are slidably arranged along a plane parallel to the loading platform. The sliding directions of the X-axis positioning rod and the Y-axis positioning rod are perpendicular. Multiple stacked sheets are positioned between the multiple X-axis positioning rods and the multiple Y-axis positioning rods. The unloading platform is a curing device.

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