Tin multi-color overprinting and accurate positioning and coating all-in-one machine

Abstract

The utility model relates to the technical field of iron can coating equipment, and discloses an iron can multi-color overprinting accurate positioning and coating all-in-one machine which comprises a rack, a positioning guide mechanism is fixedly connected to the outer portion of the rack, an inner supporting rotary spraying mechanism is fixedly connected to the outer portion of the rack, and the inner supporting rotary spraying mechanism comprises a lifting plate. The top of the lifting plate is fixedly connected with a rotary driving assembly, the bottom of the lifting plate is fixedly connected with a lifting assembly, and the bottom of the lifting plate is rotationally connected with an inner supporting and clamping assembly. According to the inner supporting rotary spraying mechanism, the iron can can be firmly clamped and accurately rotated, sliding and printing dislocation are avoided, and the coating precision and quality are improved in cooperation with the multi-axis mechanical arm and the printing roller; the positioning guide mechanism accurately guides and corrects the position of the iron can, equipment connection is guaranteed, an accurate positioning basis is provided for multi-color overprinting coating, and product quality improvement is promoted in an all-around mode.

Description

Technical Field

[0001] This utility model relates to the technical field of iron can coating equipment, and in particular to an integrated machine for multi-color overprinting and precise positioning coating of iron cans. Background Technology

[0002] With the continuous development of global manufacturing and the diversification of market demands, the advancement of coating technology for tin cans, as an important packaging material, is receiving increasing attention. Against the backdrop of increasingly stringent environmental regulations and consumers' ever-rising demands for product appearance and quality, traditional coating processes are no longer sufficient to meet the needs of the modern market. Multi-color overprinting integrated machines can achieve high-precision pattern and color rendering on the surface of tin cans, not only enhancing the product's visual appeal but also strengthening the brand's market competitiveness. At the same time, integrated coating machines make the production process more efficient and automated, reducing labor costs and production time, aligning with the development trend of intelligent manufacturing.

[0003] A multi-color overprinting and coating machine for tin cans typically consists of a conveying device, a printing device, and a drying device. The conveying device generally comprises two chains with corresponding support pieces for the tin cans, ensuring stable transport. The machine frame houses the drying device and at least one printing unit. Dewatering, cleaning, and dust removal devices are often installed before and after the drying device to ensure the tin can surface is clean and conducive to subsequent printing. The printing unit includes a screen printing machine and UV lamps. During operation, the tin cans are first conveyed by the conveying device, undergoing dewatering, cleaning, and dust removal processes, then enter the drying device for preliminary drying, and finally reach the printing device for screen printing. After screen printing, the ink is cured by a UV lamp, thus completing the multi-color overprinting and coating process for the tin cans.

[0004] In the current technological field of tin can coating, numerous problems hinder the improvement of product quality and production efficiency. On the one hand, conventional clamping methods are difficult to adapt to various types of tin cans. During the coating process, the tin cans are prone to shaking, displacement, or even sliding, resulting in severe misalignment of patterns during multi-color printing, greatly affecting the appearance quality and leading to a high defect rate. On the other hand, traditional rotating mechanisms cannot precisely control the rotation angle and speed, failing to meet the requirements of fine pattern printing. Furthermore, the lack of an efficient and coordinated spraying and rotating mechanism results in low coating efficiency. Therefore, a multi-color overprinting and precise positioning integrated coating machine for tin cans is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an integrated machine for multi-color overprinting and precise positioning coating of tin cans, which aims to improve the problem of tin cans easily shaking, displacing or even sliding during the coating process in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-color overprinting and precision positioning coating integrated machine for tin cans includes a frame, a positioning guide mechanism fixedly connected to the outside of the frame, and an internal support rotating spraying mechanism fixedly connected to the outside of the frame.

[0008] The internal support rotary spraying mechanism includes a lifting plate, a rotary drive assembly is fixedly connected to the top of the lifting plate, a lifting assembly is fixedly connected to the bottom of the lifting plate, and an internal support clamping assembly is rotatably connected to the bottom of the lifting plate.

[0009] The inner support clamping assembly includes an opening and closing connecting rod 1, one end of which is rotatably connected to a connecting lug 2, and two adjacent sides of the two connecting lugs 2 are rotatably connected to the opening and closing connecting rod 2. The inner side of the middle section of the opening and closing connecting rod 1 is rotatably connected to the outer side of the middle section of the opening and closing connecting rod 2. An inner support plate is fixedly connected to the outer side of the connecting lug 2, and an anti-slip rubber pad is fixedly connected to the outer side of the inner support plate.

[0010] As a further description of the above technical solution:

[0011] The positioning guide mechanism includes an extension seat, the outer side of which is fixedly connected to the outer side of the frame, and a positioning slide groove is fixedly connected to the top of the extension seat. A positioning stop bar is slidably connected to the top of the positioning slide groove.

[0012] As a further description of the above technical solution:

[0013] A positioning electric push rod is fixedly connected to the top of the extension seat. A positioning connecting rod is rotatably connected to the outer side of the output end of the positioning electric push rod. The end of the positioning connecting rod away from the positioning electric push rod is rotatably connected to the outer side of the rotating shaft of the positioning stop bar.

[0014] As a further description of the above technical solution:

[0015] A guide box is fixedly connected to the bottom of the frame, a guide motor is fixedly connected to the bottom of the guide box, a drive gear is fixedly connected to the outer side of the output end of the guide motor, the drive gear is rotatably connected inside the guide box, a U-shaped guide push rod is fixedly connected to the outer side of the drive gear, a limit groove is fixedly connected to the top of the frame, the outer side of the U-shaped guide push rod is slidably connected to the inner side of the limit groove, a guide strip is fixedly connected to the outer side of the U-shaped guide push rod, and a guide rack is slidably connected inside the guide box, the guide rack and the drive gear are meshed with each other;

[0016] As a further description of the above technical solution:

[0017] A multi-axis robotic arm is fixedly connected to the top of the frame, and printing rollers are rotatably connected inside the multi-axis robotic arm.

[0018] As a further description of the above technical solution:

[0019] A conveyor motor is fixedly connected to the outside of the frame, and a conveyor belt is coupled to the outside of the output end of the conveyor motor.

[0020] As a further description of the above technical solution:

[0021] The lifting assembly includes an extension block, the extension block is fixedly connected to the outside of the frame, a lifting cylinder is fixedly connected to the top of the extension block, a guide slide rod is fixedly connected to the top of the extension block, the bottom of the lifting plate is fixedly connected to the top of the output end of the lifting cylinder, and the inner side of the lifting plate is slidably connected to the outer side of the guide slide rod.

[0022] As a further description of the above technical solution:

[0023] The rotary drive assembly includes a clamping motor, the bottom of which is fixedly connected to the top of the lifting plate, and a rotating connecting block is fixedly connected to the outer side of the output end of the clamping motor.

[0024] As a further description of the above technical solution:

[0025] A clamping cylinder is fixedly connected inside the rotating connecting block. A clamping connecting seat is fixedly connected to the outer side of the output end of the clamping cylinder. A plurality of connecting ears are fixedly connected to the outer side of the clamping connecting seat. The outer side of the connecting ears is fixedly connected to the outer side of the rotating connecting block.

[0026] As a further description of the above technical solution:

[0027] The opening and closing linkage one is rotatably connected to the inner side of the connecting ear one away from the outer side of the connecting ear two, and the opening and closing linkage two is rotatably connected to the inner side of the connecting ear one away from the outer side of the connecting ear two.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the inner support rotary spraying mechanism drives the lifting plate to descend through the lifting component, while the clamping cylinder moves, driving the opening and closing linkage one and opening and closing linkage two through the clamping connecting seat and connecting ear one, so that the inner support plate opens to clamp the iron can; then the clamping motor drives the inner support clamping component and the iron can to rotate through the rotating connecting block, and the multi-axis robotic arm moves, and the printing roller inside it contacts the surface of the rotating iron can to roll and perform coating printing, thereby achieving firm clamping and precise rotation of the iron can, ensuring its stability during processing, avoiding slippage and printing misalignment, and completing the multi-color overprinting coating effect in conjunction with the multi-axis robotic arm and printing roller, improving the coating accuracy and quality.

[0030] 2. In this utility model, the positioning and guiding mechanism drives the active gear to rotate via the guide motor, which meshes with the guide rack, drives the U-shaped guide push rod and guide strip, and guides the iron can to the bottom of the inner support rotary spraying mechanism; relying on the positioning electric push rod to push the positioning connecting rod, the positioning stop strip slides in the positioning groove, accurately corrects the position of the iron can, provides a guarantee for equipment connection, and provides a precise positioning basis for the subsequent multi-color overprinting coating process, helping to improve product quality. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of the multi-color overprinting and precise positioning coating integrated machine for iron cans proposed in this utility model;

[0032] Figure 2 This is a schematic diagram of the clamping motor of the integrated machine for precise positioning and coating of multi-color overprinting on iron cans proposed in this utility model.

[0033] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 4 This is a schematic diagram of the limiting slide groove of the multi-color overprinting and precision positioning coating integrated machine for iron cans proposed in this utility model.

[0035] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0036] Legend:

[0037] 1. Frame; 2. Conveyor motor; 3. Conveyor belt; 4. Extension block; 5. Guide slide bar; 6. Lifting cylinder; 7. Lifting plate; 8. Clamping motor; 9. Rotating connecting block; 10. Clamping cylinder; 11. Clamping connecting seat; 12. Connecting ear one; 13. Opening and closing linkage one; 14. Opening and closing linkage two; 15. Connecting ear two; 16. Inner support plate; 17. Anti-slip rubber pad; 18. Positioning electric push rod; 19. Positioning linkage; 20. Positioning slide groove; 21. Positioning stop bar; 22. Guide box; 23. Guide motor; 24. Drive gear; 25. Guide rack; 26. U-shaped guide push rod; 27. Limiting slide groove; 28. Guide bar; 29. ​​Multi-axis robotic arm; 30. Printing roller; 31. Extension seat. Detailed Implementation

[0038] 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.

[0039] Reference Figures 1 to 3 An embodiment of this utility model is provided: a multi-color overprinting precision positioning coating integrated machine for iron cans, including a frame 1. The frame 1 is the basic support structure of the entire equipment to withstand various loads during the operation of the equipment. A positioning guide mechanism is fixedly connected to the outside of the frame 1, and an internal support rotating spraying mechanism is fixedly connected to the outside of the frame 1.

[0040] The internal support rotary spraying mechanism includes a lifting plate 7. The lifting plate 7 has sufficient strength and rigidity to withstand the weight of the internal support clamping assembly and the rotary drive assembly, as well as various forces during operation. The top of the lifting plate 7 is fixedly connected to the rotary drive assembly, the bottom of the lifting plate 7 is fixedly connected to the lifting assembly, and the bottom of the lifting plate 7 is rotatably connected to the internal support clamping assembly.

[0041] The inner support clamping assembly includes an opening and closing connecting rod 13. During operation, the opening and closing connecting rod 13 converts the linear motion of the clamping cylinder 10 into the opening and closing motion of the inner support plate 16. One end of the opening and closing connecting rod 13 is rotatably connected to a connecting lug 15. The connecting lug 15 serves as the rotation fulcrum for both the opening and closing connecting rod 13 and the opening and closing connecting rod 14, reducing frictional resistance during rod rotation and improving the flexibility of movement. The two connecting lugs 15 are rotatably connected to the adjacent sides of the two connecting lugs 15, and the opening and closing connecting rod 14 is rotatably connected to the opening and closing connecting rod 13. The inner support plate 16 is opened and closed synchronously. The inner side of the middle section of the opening and closing linkage 13 is rotatably connected to the outer side of the middle section of the opening and closing linkage 14. The inner support plate 16 is fixedly connected to the outer side of the connecting ear 2 15. The inner support plate 16 is a component that directly contacts the inner wall of the iron can. It can fit tightly against the inner wall of the iron can, providing stable support and positioning. The outer side of the inner support plate 16 is fixedly connected to the anti-slip rubber pad 17. The anti-slip rubber pad 17 can increase friction and has strong anti-slip performance to prevent the iron can from sliding during processing.

[0042] A multi-axis robotic arm 29 is fixedly connected to the top of the frame 1, which can realize complex movements in space, thereby achieving precise positioning and motion trajectory control of the printing roller 30 on the surface of the tin can. The printing roller 30 is rotatably connected inside the multi-axis robotic arm 29. The printing roller 30 is a key component for realizing multi-color overprinting. The surface of the roller is engraved with patterns or text. By contacting and rolling with the surface of the tin can, the paint is transferred to the surface of the tin can to realize the printing function.

[0043] A conveyor motor 2 is fixedly connected to the outside of the frame 1. The conveyor motor 2 is the component that provides power to the conveyor belt 3. The conveyor motor 2 is connected to the drive roller of the conveyor belt 3, which converts the rotational motion of the motor into the linear motion of the conveyor belt 3, thereby realizing the conveying function of the iron can. The output end of the conveyor motor 2 is coupled to the outside of the conveyor belt 3. The surface is specially treated to increase friction and prevent the iron can from sliding during the conveying process.

[0044] The lifting assembly includes an extension block 4, which provides a mounting base for the lifting cylinder 6 and the guide slide rod 5. Its mounting position and height on the frame 1 can be adjusted according to actual needs to adapt to the processing requirements of different specifications of iron cans. The extension block 4 is externally fixedly connected to the outside of the frame 1. The top of the extension block 4 is fixedly connected to the lifting cylinder 6, which is the power source for the up and down movement of the lifting plate 7. The top of the extension block 4 is fixedly connected to the guide slide rod 5. The guide slide rod 5 has a smooth and wear-resistant surface, which can reduce the frictional resistance between it and the lifting plate 7. The guide slide rod 5 can ensure that the lifting plate 7 can move smoothly along the slide rod during the lifting process, with high straightness and precision. The bottom of the lifting plate 7 is fixedly connected to the top of the output end of the lifting cylinder 6, and the inner side of the lifting plate 7 is slidably connected to the outer side of the guide slide rod 5.

[0045] The rotary drive assembly includes a clamping motor 8, which is the core component that provides rotational power. It can drive the inner support clamping assembly to clamp the iron can and rotate it smoothly, so that the outer surface of the iron can can be printed with the required patterns and designs by the printing roller 30. The bottom of the clamping motor 8 is fixedly connected to the top of the lifting plate 7. A rotating connecting block 9 is fixedly connected to the outer side of the output end of the clamping motor 8. The rotating connecting block 9 can realize the rotational transmission between the motor output shaft and the inner support clamping assembly.

[0046] A clamping cylinder 10 is fixedly connected inside the rotating connecting block 9. The clamping cylinder 10 is an actuator used to control the opening and closing of the inner support clamping assembly, realizing the rapid opening and closing action of the inner support clamping assembly. A clamping connecting seat 11 is fixedly connected to the outer side of the output end of the clamping cylinder 10. The connecting seat is provided with multiple mounting holes for mounting connecting ears 12 and other related components, which has high connection firmness and reliability. Multiple connecting ears 12 are fixedly connected to the outer side of the clamping connecting seat 11, serving as the rotation fulcrum of the opening and closing connecting rod 13 and the opening and closing connecting rod 24, so as to reduce the frictional resistance when the connecting rod rotates and improve the flexibility of movement. The outer side of the connecting ears 12 is fixedly connected to the outer side of the rotating connecting block 9.

[0047] The opening / closing linkage 13 is rotatably connected to the inner side of the connecting ear 12, away from the outer side of the connecting ear 15; the opening / closing linkage 14 is rotatably connected to the inner side of the connecting ear 12, away from the outer side of the connecting ear 15.

[0048] Reference Figure 1 , Figure 4 and Figure 5The positioning guide mechanism includes an extension seat 31, which provides an installation base for the positioning slide 20 and other related components. The extension seat 31 can be adjusted in terms of its installation position and angle on the frame 1 according to actual needs to adapt to the positioning and guiding requirements of different specifications of iron cans. The outer side of the extension seat 31 is fixedly connected to the outer side of the frame 1, and the top of the extension seat 31 is fixedly connected to the positioning slide 20. The positioning slide 20 can ensure that the positioning stop 21 can slide smoothly in it. Limit blocks are set at both ends to prevent the positioning stop 21 from falling off. The top of the positioning slide 20 is slidably connected to the positioning stop 21. The positioning stop 21 is a key component for realizing the positioning of iron cans. It can make good contact with the surface of the iron can and play the role of positioning and blocking. A rubber buffer layer is set on the surface in contact with the iron can to prevent damage to the surface of the iron can during the positioning process.

[0049] The top of the extension seat 31 is fixedly connected to a positioning electric push rod 18, which can drive the subsequent components to operate. By controlling the forward and reverse rotation of the motor, the push rod can be extended and retracted, thereby pushing the positioning connecting rod 19, which in turn drives the positioning stop 21 to slide in the positioning slide groove 20, so as to achieve precise adjustment of the position of the tin can. After the coating and printing are completed, the positioning electric push rod 18 can be reversed to move the positioning stop 21 away, and the finished tin can is then conveyed out by the conveyor belt. The outer side of the output end of the positioning electric push rod 18 is rotatably connected to the positioning connecting rod 19. During the movement, the pushing force of the electric push rod can be accurately transmitted, so that the positioning stop 21 moves along the predetermined trajectory. The end of the positioning connecting rod 19 away from the positioning electric push rod 18 is rotatably connected to the outer side of the rotating shaft of the positioning stop 21.

[0050] A guide box 22 is fixedly connected to the bottom of the frame 1. The internal space of the guide box 22 is used to install components such as the drive gear 24 and the guide rack 25, and also has a certain protective function to prevent dust and impurities from entering the internal transmission components and affecting the normal operation of the equipment. A guide motor 23 is fixedly connected to the bottom of the guide box 22. The guide motor 23 is the power supply component. By driving the drive gear 24 to rotate, it drives the guide rack 25 and the U-shaped guide push rod 26 to move, thereby achieving precise control of the position of the guide bar 28. The output end of the guide motor 23 is fixedly connected to the outside. A drive gear 24 is connected to the guide motor 23, which transmits the rotational driving force to drive the subsequent components to move. The drive gear 24 is rotatably connected inside the guide box 22. A U-shaped guide push rod 26 is fixedly connected to the outside of the drive gear 24. Under the drive of the guide rack 25, the U-shaped guide push rod 26 can move linearly along the limiting slide groove 27. The top of the frame 1 is fixedly connected to the limiting slide groove 27, which can ensure that the U-shaped guide push rod 26 can slide smoothly in it and prevent the U-shaped guide push rod 26 from falling off or tilting during the movement.

[0051] The outer side of the U-shaped guide push rod 26 is slidably connected to the inner side of the limiting groove 27. A guide strip 28 is fixedly connected to the outer side of the U-shaped guide push rod 26. The guide strip 28 is a key component for guiding the tin can. It can make good contact with the surface of the tin can and play a guiding role, accurately guiding the tin can to the bottom of the inner support rotary spraying mechanism, which facilitates the clamping and coating process. A guide rack 25 is slidably connected inside the guide box 22. The guide rack 25 can move linearly under the drive of the drive gear 24, thereby pushing the U-shaped guide push rod 26 and the guide strip 28 to move, realizing the guiding function of the tin can. The guide rack 25 and the drive gear 24 are meshed with each other.

[0052] Working principle: When the conveyor motor 2 starts, it drives the conveyor belt 3 to rotate and transport the iron can to the working area of ​​the equipment. During the iron can transportation process, the guide motor 23 works and the drive gear 24 at its output end rotates and meshes with the guide rack 25, driving the guide rack 25 to move linearly, which in turn pushes the U-shaped guide push rod 26 to move along the limit slide groove 27. The guide strip 28 fixed on the U-shaped guide push rod 26 moves accordingly, accurately guiding the iron can to the bottom of the inner support rotary spraying mechanism.

[0053] When the tin can reaches the designated position, the positioning electric push rod 18 extends and drives the positioning stop 21 to slide in the positioning groove 20 through the positioning connecting rod 19. The positioning stop 21 blocks the tin can and makes it accurately stop at the predetermined position.

[0054] At this time, the lifting cylinder 6 operates, pushing the lifting plate 7 to move downward along the guide slide rod 5, and the inner support rotating spraying mechanism descends accordingly. Simultaneously, the clamping cylinder 10 operates, driving the opening and closing connecting rod 13 and the opening and closing connecting rod 2 14 to move through the clamping connecting seat 11 and connecting ear 12, causing the inner support plate 16 to open. The anti-slip rubber pad 17 on the outer side of the inner support plate 16 fits tightly against the inner wall of the iron can, firmly clamping the iron can.

[0055] Next, the clamping motor 8 starts, and drives the inner support clamping assembly and the iron can to rotate through the rotating connecting block 9. The multi-axis robotic arm 29 moves according to the preset program. The printing roller 30 connected inside contacts and rolls with the rotating iron can surface, transferring the paint to the iron can surface to achieve multi-color overprinting.

[0056] After the coating is completed, the clamping cylinder 10 reverses its movement, causing the inner support plate 16 to retract and release the iron can. The lifting cylinder 6 drives the lifting plate 7 to rise, the inner support rotating spraying mechanism resets, the positioning electric push rod 18 reverses its drive, the positioning stop bar 21 moves away, and the conveyor belt 3 continues to run, sending the coated iron can out of the equipment and completing the entire workflow.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-color overprinting and precision positioning coating machine for tin cans, comprising a frame (1), characterized in that: The frame (1) is externally fixedly connected to a positioning guide mechanism, and the frame (1) is externally fixedly connected to an internal support rotating spraying mechanism. The inner support rotating spraying mechanism includes a lifting plate (7), a rotating drive assembly is fixedly connected to the top of the lifting plate (7), a lifting assembly is fixedly connected to the bottom of the lifting plate (7), and an inner support clamping assembly is rotatably connected to the bottom of the lifting plate (7). The inner support clamping assembly includes an opening and closing connecting rod one (13), one end of which is rotatably connected to a connecting lug two (15), and the two connecting lug two (15) are rotatably connected to an opening and closing connecting rod two (14) on their adjacent sides. The inner side of the middle section of the opening and closing connecting rod one (13) is rotatably connected to the outer side of the middle section of the opening and closing connecting rod two (14). An inner support plate (16) is fixedly connected to the outer side of the connecting lug two (15), and an anti-slip rubber pad (17) is fixedly connected to the outer side of the inner support plate (16).

2. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: The positioning guide mechanism includes an extension seat (31), the outer side of which is fixedly connected to the outer side of the frame (1), and a positioning slide groove (20) is fixedly connected to the top of the extension seat (31), and a positioning stop bar (21) is slidably connected to the top of the positioning slide groove (20).

3. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 2, characterized in that: The top of the extension seat (31) is fixedly connected to a positioning electric push rod (18), and the output end of the positioning electric push rod (18) is rotatably connected to a positioning link (19). The end of the positioning link (19) away from the positioning electric push rod (18) is rotatably connected to the outside of the rotating shaft of the positioning stop bar (21).

4. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: A guide box (22) is fixedly connected to the bottom of the frame (1), and a guide motor (23) is fixedly connected to the bottom of the guide box (22). A drive gear (24) is fixedly connected to the outer side of the output end of the guide motor (23). The drive gear (24) is rotatably connected inside the guide box (22). A U-shaped guide push rod (26) is fixedly connected to the outer side of the drive gear (24). A limit groove (27) is fixedly connected to the top of the frame (1). The outer side of the U-shaped guide push rod (26) is slidably connected to the inner side of the limit groove (27). A guide strip (28) is fixedly connected to the outer side of the U-shaped guide push rod (26). A guide rack (25) is slidably connected inside the guide box (22). The guide rack (25) and the drive gear (24) are meshed together.

5. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: A multi-axis robotic arm (29) is fixedly connected to the top of the frame (1), and a printing roller (30) is rotatably connected inside the multi-axis robotic arm (29).

6. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: A conveyor motor (2) is fixedly connected to the outside of the frame (1), and a conveyor belt (3) is coupled to the outside of the output end of the conveyor motor (2).

7. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: The lifting assembly includes an extension block (4), the extension block (4) is fixedly connected to the outside of the frame (1), a lifting cylinder (6) is fixedly connected to the top of the extension block (4), a guide slide rod (5) is fixedly connected to the top of the extension block (4), the bottom of the lifting plate (7) is fixedly connected to the top of the output end of the lifting cylinder (6), and the inner side of the lifting plate (7) is slidably connected to the outer side of the guide slide rod (5).

8. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 1, characterized in that: The rotary drive assembly includes a clamping motor (8), the bottom of which is fixedly connected to the top of the lifting plate (7), and a rotating connecting block (9) is fixedly connected to the outer side of the output end of the clamping motor (8).

9. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 8, characterized in that: A clamping cylinder (10) is fixedly connected inside the rotating connecting block (9). A clamping connecting seat (11) is fixedly connected to the outer side of the output end of the clamping cylinder (10). A plurality of connecting ears (12) are fixedly connected to the outer side of the clamping connecting seat (11). The outer side of the connecting ears (12) is fixedly connected to the outer side of the rotating connecting block (9).

10. The multi-color overprinting and precision positioning coating integrated machine for tin cans according to claim 9, characterized in that: The opening and closing linkage 1 (13) is rotatably connected to the inner side of the connecting ear 1 (12) away from the outer side of the connecting ear 2 (15), and the opening and closing linkage 2 (14) is rotatably connected to the inner side of the connecting ear 1 (12) away from the outer side of the connecting ear 2 (15).

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