A partial printing and shaping device for a packaging box

Abstract

The present application relates to packaging box printing processing technical field, specifically disclose a kind of packaging box local printing setting device, including base, rotationally arranged on base rotating platform and fixed on rotating platform upper guide cam;Rotating platform is circumferentially provided with a plurality of follow-up positioning clamping fixtures, and is sequentially provided with feeding, visual inspection, cleaning, printing, setting and discharging station along the direction of rotation;Jig includes radially sliding push rod, its inner end roller is in contact with the profile of guide cam, and outer end is connected with a pair of mirror image symmetrical clamping end plate through inner side strip, and the back surface of clamping end plate is provided with inclined block, and rotating platform is provided with guide that cooperates with inclined block;Roller is opened when clamping end plate is moved along the small diameter arc segment of guide cam, and it is automatically closed and clamped packaging box when clamping end plate is moved along the large diameter arc segment;The present application is automatically clamped and released by mechanical linkage, integrates visual inspection and cleaning function, with the advantages of compact structure, reliable positioning, high printing precision.

Description

Technical Field

[0001] This invention relates to the field of packaging box printing and processing technology, and specifically discloses a packaging box partial printing and shaping device. Background Technology

[0002] In the field of product packaging, the surface of packaging boxes often needs to be printed with trademarks, text, patterns, and other partial markings. Screen printing, due to its thick ink layer, strong adhesion, and adaptability to curved surfaces and irregularly shaped substrates, has been widely used for partial printing on pre-formed three-dimensional packaging boxes.

[0003] Patent application number 201610951715.4 discloses a rotary screen printing machine, which includes a column, a rotating mechanism that can rotate intermittently, four trays driven by the rotating mechanism, a printing mechanism located above the rotating mechanism, and a drying device facing downwards towards the second tray. This patent adopts a four-station rotary layout, initially integrating feeding, printing, drying, and unloading, thus improving the efficiency of screen printing to some extent. However, when applying this screen printing machine to partial printing on packaging boxes, certain shortcomings still exist.

[0004] Firstly, the tray in this rotary screen printing machine is only used to support the items and lacks any active clamping or positioning structure. The packaging boxes to be printed rest on the tray solely on their own weight, lacking radial and lateral restraints. When the screen presses down against the substrate and the print head applies printing pressure, the items are prone to slipping or tilting, causing the printed pattern to shift. Adding active clamps consisting of cylinders or other driven components around the tray could improve positioning reliability, but it would significantly increase the overall structural complexity and manufacturing cost of the machine. Moreover, different sizes of packaging boxes require different clamps or adjustments to the clamp stroke, making changeover operations cumbersome and limiting the applicable scope. Secondly, the screen printing machine lacks any online inspection process before the printing station. After the packaging box is placed on the pallet at the loading station, the equipment cannot automatically identify or judge whether it is accurately centered on the pallet, or whether there are foreign objects such as dust, lint, or oil on the box surface (the area to be printed). If the packaging box is misplaced or its surface is contaminated, the printing process will still proceed as normal, resulting in defective products in batches due to inaccurate pattern alignment or reduced ink adhesion. Based on this, this application proposes a packaging box partial printing and shaping device that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a packaging box partial printing and shaping device to solve the problems of existing rotary screen printing machines when applied to partial printing of packaging boxes, such as lack of active clamping and positioning, easy slippage or tilting of the packaging box during printing leading to pattern deviation; lack of online inspection process before printing, making it impossible to identify whether the packaging box is placed in place and whether there are foreign objects on the surface, which easily leads to batch printing defects.

[0006] This invention is achieved through the following technical solution: A packaging box partial printing and shaping device includes a base, a rotating platform that rotates intermittently at a fixed angle is arranged directly above the base, at least six follow-up positioning clamping fixtures are arranged on the upper surface of the rotating platform, and a guide cam fixed relative to the base is concentrically arranged above the rotating platform. The follow-up positioning clamping fixtures interact with the guide cams during the rotation of the rotating platform to achieve closed clamping of the packaging box. A feeding belt conveyor, a detection camera, a cleaning component, a screen printing mechanism and a curing and shaping mechanism are arranged sequentially along the rotation direction of the follow-up positioning clamping fixtures. The follow-up positioning clamping fixture includes a push rod that is radially slidably disposed on a rotating platform. The inner radial end of the push rod is provided with a roller that interacts with a guide cam. The outer radial end of the push rod is fixedly connected to an inner side strip, and a first spring is disposed between the inner side strip and the rotating platform. Clamping end plates that are mirror-symmetrically arranged about the push rod as an axis of symmetry are slidably disposed at both ends of the outer radial side of the inner side strip. A second spring is disposed between the clamping end plates and the inner side strip to keep the two clamping end plates in an opening tendency that keeps them away from each other. Inclined blocks are disposed on the opposite end faces of the two clamping end plates. A guide member that interacts with the corresponding inclined block is disposed on the rotating platform located radially outside the two inclined blocks.

[0007] As a further feature of the above scheme, the outline of the guide cam includes a small-diameter arc segment, a large-diameter arc segment, and a connecting segment for connecting the two ends of the small-diameter arc segment and the large-diameter arc segment; the rollers on the follow-up positioning clamping fixture remain open when acting on the small-diameter arc segment and remain closed when acting on the large-diameter arc segment.

[0008] As a further provision of the above scheme, a regular polygonal frame is fixedly provided on the upper surface of the rotating platform, the push rod passes through the corresponding side of the regular polygonal frame, and the first spring is provided between the inner strip and the corresponding side of the regular polygonal frame.

[0009] As a further provision of the above scheme, a second sliding groove is provided at both ends of the radial outer side of the inner side strip, and a sliding rod is provided in the second sliding groove. A sliding hole block is provided on the clamping end plate, which extends into the second sliding groove and slides with the sliding rod. The second spring is sleeved on the sliding rod and abuts against the sliding hole block and the end wall of the second sliding groove.

[0010] As a further feature of the above solution, the push rod is a length-adjustable structure, which includes a fixed section fixedly connected to the inner side strip and a telescopic section telescopically connected to the fixed section, and the roller is rotatably disposed at the radial inner end of the telescopic section.

[0011] As a further feature of the above scheme, the rotating platform has a slot perpendicular to the direction of the push rod. The lower end of the guide is connected to a threaded post that passes through the slot. The lower end of the threaded post that extends out of the slot is provided with a locking element for adjusting and locking the position of the guide on the slot.

[0012] As a further feature of the above solution, the lens of the inspection camera is positioned downwards and aligned with the clamping center of the follow-up positioning fixture at the visual inspection station. The inspection camera is also electrically connected to a control box with a built-in processor. The processor uses the photos taken by the inspection camera to determine whether the packaging box is centered and whether the upper surface of the packaging box is clean.

[0013] As a further provision of the above solution, the cleaning component includes a second bracket, a telescopic cylinder disposed on the upper end of the second bracket, a brush strip connected to the telescopic end of the telescopic cylinder, and bristles disposed on the lower surface of the brush strip; the telescopic cylinder drives the brush strip to move radially, thereby cleaning the upper surface of the packaging box by means of the bristles.

[0014] As a further feature of the above solution, the curing and shaping mechanism includes a third support, a lifting cylinder disposed on the upper end of the third support, and a box connected to the lower end of the lifting cylinder. The top wall of the box is provided with an ultraviolet lamp tube for ink curing and shaping.

[0015] The packaging box partial printing and shaping device disclosed in this invention realizes automatic clamping and release of packaging boxes during the conveying process of a rotating platform through the cooperation of a follow-up positioning clamping fixture and a guide cam. It is also seamlessly integrated with multi-station online detection, cleaning, printing and curing functions to form a high-efficiency and precise automated partial printing production line.

[0016] Specifically, at least six follower positioning and clamping fixtures are evenly arranged circumferentially on the upper surface of the rotating platform, corresponding to the loading station, visual inspection station, cleaning station, partial printing station, shaping station, and unloading station, respectively. A guide cam is concentrically fixed above the rotating platform, and its contour line is composed of a small-diameter arc segment, a large-diameter arc segment, and a transition connecting segment. Each follower positioning and clamping fixture includes a radially sliding push rod, whose inner end roller abuts against the guide cam, and an inner side strip is fixed at the outer end. A pair of mirror-symmetrical clamping end plates are slidably arranged at both ends of the inner side strip. The opposite end faces of the clamping end plates are provided with inclined blocks, and a guide component that cooperates with the inclined blocks is fixed on the rotating platform.

[0017] During operation, the rotating platform rotates intermittently at a fixed angle. When the roller moves along the small-diameter arc segment, the first spring pushes the inner strip and push rod outward. The relative position of the inclined block and the guide keeps the clamping end plates open under the action of the second spring, allowing the packaging box to be freely placed in and removed, corresponding to the loading and unloading stations. When the roller rotates into the large-diameter arc segment, the push rod is pushed inward, and the guide presses the inclined block, causing the two clamping end plates to overcome the elasticity of the second spring and move closer to each other, reliably clamping the packaging box. This state covers the inspection, cleaning, and printing stations. After the packaging box passes through the inspection camera to determine its position and surface cleanliness, the cleaning component to remove foreign objects, and the screen printing mechanism to complete the partial pattern printing, the fixture automatically opens, and the printed packaging box enters the curing and shaping station for UV curing. Finally, it is removed at the unloading station.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes the mechanical linkage between a guide cam and a follow-up positioning clamping fixture to automatically clamp and release the packaging box during the rotation of the rotating platform. This eliminates the need for additional active drive components such as cylinders and sensors, effectively reducing the structural complexity and manufacturing cost of adding fixtures. At the same time, the clamping action precisely corresponds to the position of each workstation, ensuring that the packaging box does not shift during the printing process. This significantly improves the alignment accuracy of the printed patterns on the packaging box and enhances the printing quality.

[0019] This invention adopts a multi-station integration, which integrates six stations—feeding, visual inspection, cleaning, partial printing, curing and shaping, and unloading—on the same rotating platform. Each process operates in parallel with a compact cycle, realizing continuous automated production of partial printing on packaging boxes and effectively improving the efficiency of partial printing on packaging boxes.

[0020] This invention sets up a detection camera and a cleaning component sequentially before the printing station, which can automatically determine whether the packaging box is placed in place and whether there is dust or oil in the area to be printed, and clean it in time, eliminating printing defects caused by position deviation or surface contamination from the source, and effectively ensuring the printing quality of the packaging box.

[0021] The push rod in the follow-up positioning clamping fixture of this invention further adopts an adjustable telescopic structure, and the guide can be adjusted along the strip opening to adjust the installation position. It can adapt to the clamping of packaging boxes of different sizes through simple manual adjustment, without the need to replace the entire fixture. The changeover time is short, making it particularly suitable for the flexible production needs of small batches and multiple varieties. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle; Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the base, guide cam, screen printing mechanism, etc. in this invention; Figure 4 This is a three-dimensional structural diagram of the rotating platform, follow-up positioning and clamping fixture, etc. in this invention; Figure 5 This is a three-dimensional structural diagram of the follower positioning clamping fixture in this invention; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 7 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 8 This is a three-dimensional structural diagram of the curing and shaping mechanism in this invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-8 This application will be described in detail with reference to the embodiments. Example 1

[0026] Example 1 discloses a device for partial printing and shaping of packaging boxes, such as... Figures 1-3As shown, the device includes a base 10, and a rotating platform 20 that rotates intermittently at a fixed angle is positioned directly above the base 10. At least six follow-up positioning clamping fixtures 30 are evenly arranged circumferentially on the upper surface of the rotating platform 20, corresponding sequentially to the loading station, visual inspection station, cleaning station, partial printing station, shaping station, and unloading station. An infeed belt conveyor 40 is provided at the loading station, an inspection camera 50 is provided at the visual inspection station, a cleaning assembly 60 is provided at the cleaning station, a screen printing mechanism 70 is provided at the partial printing station, and a curing and shaping mechanism 80 is provided at the shaping station.

[0027] like Figures 3-6 As shown, a hollow vertical shaft 21 extending into the base 10 is disposed at the center of the rotating platform 20. The hollow vertical shaft 21 is rotatably connected to the center of the upper surface of the base 10 via a bearing. The base 10 also contains a power source (not shown) for driving the hollow vertical shaft 21 to rotate a set angle each time. A column 22 is inserted through the hollow vertical shaft 21, with its lower end extending into and fixedly connected to the base 10. A guide cam 23 is disposed at the upper end of the column 22 extending out of the rotating platform 20. The outline of the guide cam 23 consists of a small-diameter arc segment 231, a large-diameter arc segment 232, and a connecting segment 233. The small-diameter arc segment 231 corresponds to the shaping station, unloading station, and loading station; the large-diameter arc segment 232 corresponds to the visual inspection station, cleaning station, and partial printing station; the two connecting segments 233 are used for transition connections between the two ends of the small-diameter arc segment 231 and the large-diameter arc segment 232, respectively. In addition, a regular polygonal frame 24 is fixedly provided on the upper surface of the rotating stage 20 between the periphery of the guide cam 23 and the multiple follower positioning clamping fixtures 30, and each side of the regular polygonal frame 24 corresponds to a follower positioning clamping fixture 30.

[0028] The specific structure of the follow-up positioning clamping fixture 30 is as follows: Figures 4-6 As shown, the follow-up positioning clamping fixture 30 includes a push rod 31 that radially penetrates the corresponding side of a regular polygonal frame 24. A roller 32 is rotatably mounted at the inner end of the push rod 31, abutting against the contour surface of the guide cam 23. An inner side strip 33 perpendicular to the push rod 31 is fixedly connected to the outer end of the push rod 31. A first spring 34 is provided between the inner side strip 33 and the corresponding side of the regular polygonal frame 24. This first spring 34 constantly pushes the inner side strip 33 to move radially inward, thereby causing the roller 32 to closely adhere to the contour surface of the guide cam 23. A slider 331 is provided at the lower end of the inner side strip 33. A first groove 201 parallel to the push rod 31 and cooperating with the slider 331 is formed on the upper surface of the rotating platform 20.

[0029] Both ends of the outer surface of the inner strip 33 are provided with second sliding grooves 332 perpendicular to the direction of the push rod 31, and a sliding rod 333 is disposed in the second sliding groove 332. A clamping end plate 35 is provided on the outer side of each second sliding groove 332, and the two clamping end plates 35 are mirror-symmetrical about the push rod 31. A sliding hole block 351 is provided on the inner end of the clamping end plate 35, which extends into the second sliding groove 332 and cooperates with the sliding rod 333. A second spring 36 is provided between the sliding hole block 351 and the end wall of the second sliding groove 332 and sleeved around the sliding rod 333. In the natural state, the two clamping end plates 35 maintain the maximum distance under the action of the second spring 36 so that the packaging box 100 can be fed into it.

[0030] A ramp block 352 is fixedly mounted on each of the opposite end faces of the two clamping end plates 35. The ramp surface of each ramp block 352 faces radially outward and is inclined outward. A guide member 37 is rotatably mounted on the radially outer end of each ramp block 352, which can be either a rotating pin or a pressing roller. When the push rod 31 drives the inner strip 33 and the clamping end plates 35 to move radially as a whole, the guide member 37 slides relative to the ramp block 352, forcing the two clamping end plates 35 to overcome the elastic force of the second spring 36 and move closer to each other, thereby clamping the packaging box 100. Conversely, when the push rod 31 moves in the opposite direction, the second spring 36 causes the two clamping end plates 35 to reset and open, releasing the packaging box 100.

[0031] like Figures 1-3 , Figure 7 As shown, the feed belt conveyor 40 includes a conveyor seat 41 aligned radially with the loading station. The conveyor seat 41 is stably supported on the ground by multiple support frames 42 connected to its lower surface. A feed conveyor belt 43 is disposed in the conveyor seat 41, and a central guide plate 44 located above the feed conveyor belt 43 is disposed in the conveyor seat 41 near the rotating platform 20 to guide the packaging box 100 into the follow-up positioning clamping fixture 30 of the loading station in the correct posture.

[0032] The inspection camera 50 is stably supported by a first bracket fixed to the upper surface of the base 10, and the lens of the inspection camera 50 is positioned downwards, aligned with the clamping center of the follow-up positioning clamping fixture 30. The inspection camera 50 is also electrically connected to a control box 90 with a built-in processor. Whenever a packaging box 100, which is centered and clamped by the follow-up positioning clamping fixture 30, is transported directly below the inspection camera 50, the inspection camera 50 takes a picture of it from above. The image is processed by the processor to determine whether the packaging box 100 has been centered and whether there are any impurities or foreign objects on the upper surface of the packaging box 100 (i.e., the area to be partially printed).

[0033] The cleaning assembly 60 includes a second bracket 61 fixedly mounted on the upper surface of the base 10. A radially arranged telescopic cylinder 62 is mounted on the upper end of the second bracket 61. A brush strip 63 is connected to the telescopic end of the cylinder 62, and numerous bristles are provided on the lower surface of the brush strip 63. When the inspection camera 50 detects impurities or foreign objects on the upper surface of the packaging box 100, the cleaning assembly 60 is activated to clean the upper surface of the packaging box 100. After cleaning, it is rotated and moved to the screen printing mechanism 70 for partial pattern printing.

[0034] The screen printing mechanism 70 can be a conventional screen printing device in the art, which includes a screen, a squeegee, an ink return blade, and a drive mechanism, which will not be described in detail here. When the packaging box 100 is rotated to the partial printing station by the rotating stage 20, the screen printing mechanism 70 descends, and the ink is squeezed through the pattern area on the screen to the upper surface of the packaging box 100 by the squeegee, so as to achieve partial pattern printing.

[0035] Curing and shaping mechanism 80 Figure 8 As shown, the system includes a third support 81 fixedly mounted on the upper surface of the base 10. A lifting cylinder 82 is mounted on the upper end of the third support 81, and a cover 83 with an opening at the bottom larger than the packaging box 100 is connected to the lower end of the lifting cylinder 82. An ultraviolet lamp 84 is mounted on the inner top wall of the cover 83. When the printed packaging box 100 is moved to the setting station, the lifting cylinder 82 pushes the cover 83 downwards to cover the packaging box 100. Then, the ultraviolet lamp 84 is lit to cure and set the printed UV ink.

[0036] Finally, at the unloading station, workers can be arranged to remove and stack the partially printed and finalized packaging boxes, or an unloading robot can be set up for automatic grabbing and unloading. Example 2

[0037] Example 2 discloses a packaging box partial printing and shaping device optimized based on the technical solution in Example 1. The similarities with Example 1 will not be repeated. This Example 2 focuses on improving the follow-up positioning clamping fixture 30, enabling it to adapt to packaging boxes 100 of more different sizes.

[0038] like Figure 5 and Figure 6As shown, the push rod 31 in this embodiment 2 adopts a two-section structure with adjustable length. It includes a fixed section 311 fixed to the inner strip 33, and a telescopic section 312 inserted or threadedly connected to the radial inner end of the fixed section 311. The roller 32 is rotatably set at the radial inner end of the telescopic section 312. After the connection length between the telescopic section 312 and the fixed section 311 is adjusted, the two can be fixed and locked by a locking component. When the roller 32 abuts against different sections of the guide cam 23, the positions of the innermost and outermost ends of the inner strip 33 will change, thereby adapting to different dimensions of the packaging box 100 along the radial direction (i.e., the width direction).

[0039] Furthermore, in this embodiment 2, a strip-shaped opening 202 perpendicular to the direction of the push rod 31 is provided on both sides of the rotating platform 20 at the radial outer end of each follower positioning clamping fixture 30. A threaded post 371 penetrating the strip-shaped opening 202 is connected to the lower end of the guide member 37, and a locking member 372 consisting of a nut block and a washer is provided on the threaded post 371 extending below the strip-shaped opening 202. When it is necessary to accommodate different lengths of the packaging box 100, the locking member 372 can be loosened, the relative position of the two guide members 37 can be adjusted along the strip-shaped opening 202, and then re-locked. During the radial movement of the follower positioning clamping fixture 30, the contact point between the guide member 37 and the inclined block 352 changes, thereby changing the clamping gap between the two clamping end plates 35, achieving reliable clamping of packaging boxes of different lengths.

[0040] With the above two improvements, the follow-up positioning clamping fixture 30 of this embodiment 2 can quickly adapt to packaging boxes of various specifications without the need to replace the entire fixture, which significantly improves the versatility and changeover efficiency of the production line.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for partial printing and shaping of packaging boxes, comprising a base, wherein a rotating platform that rotates intermittently at a fixed angle is disposed directly above the base, characterized in that, The upper surface of the rotating platform is provided with at least six follow-up positioning clamping fixtures. A guide cam is concentrically arranged above the rotating platform and fixed relative to the base. The follow-up positioning clamping fixtures interact with the guide cams during the rotation of the rotating platform to achieve closed clamping of the packaging box. Along the rotation direction of the follow-up positioning clamping fixtures, a feeding belt conveyor, a detection camera, a cleaning component, a screen printing mechanism, and a curing and shaping mechanism are arranged in sequence. The follow-up positioning clamping fixture includes a push rod that is radially slidably disposed on a rotating platform. The inner radial end of the push rod is provided with a roller that interacts with a guide cam. The outer radial end of the push rod is fixedly connected to an inner side strip, and a first spring is disposed between the inner side strip and the rotating platform. Clamping end plates that are mirror-symmetrically arranged about the push rod as an axis of symmetry are slidably disposed at both ends of the outer radial side of the inner side strip. A second spring is disposed between the clamping end plates and the inner side strip to keep the two clamping end plates in an opening tendency that keeps them away from each other. Inclined blocks are disposed on the opposite end faces of the two clamping end plates. A guide member that interacts with the corresponding inclined block is disposed on the rotating platform located radially outside the two inclined blocks.

2. The packaging box partial printing and shaping device according to claim 1, characterized in that, The outline of the guide cam includes a small-diameter arc segment, a large-diameter arc segment, and a connecting segment for connecting the two ends of the small-diameter arc segment and the large-diameter arc segment; the rollers on the follow-up positioning clamping fixture remain open when acting on the small-diameter arc segment and remain closed when acting on the large-diameter arc segment.

3. The packaging box partial printing and shaping device according to claim 1, characterized in that, The upper surface of the rotating platform is fixedly provided with a regular polygonal frame, the push rod passes through the corresponding side of the regular polygonal frame, and the first spring is disposed between the inner strip and the corresponding side of the regular polygonal frame.

4. The packaging box partial printing and shaping device according to claim 3, characterized in that, The inner side strip has a second sliding groove at both ends of its radial outer side, and a sliding rod is provided in the second sliding groove. The clamping end plate is provided with a sliding hole block that extends into the second sliding groove and slides with the sliding rod. The second spring is sleeved on the sliding rod and abuts against the sliding hole block and the end wall of the second sliding groove.

5. The packaging box partial printing and shaping device according to any one of claims 1 to 4, characterized in that, The push rod is an adjustable length structure, which includes a fixed section fixedly connected to the inner side strip and a telescopic section telescopically connected to the fixed section. The roller is rotatably disposed at the radial inner end of the telescopic section.

6. The packaging box partial printing and shaping device according to claim 5, characterized in that, The rotating platform has a slot perpendicular to the direction of the push rod. The lower end of the guide is connected to a threaded post that passes through the slot. The lower end of the threaded post that extends out of the slot is provided with a locking element for adjusting and locking the position of the guide on the slot.

7. The packaging box partial printing and shaping device according to claim 1, characterized in that, The lens of the inspection camera is positioned downwards and aligned with the clamping center of the follow-up positioning fixture at the visual inspection station. The inspection camera is also electrically connected to a control box with a built-in processor. The processor uses the photos taken by the inspection camera to determine whether the packaging box is centered and whether the upper surface of the packaging box is clean.

8. The packaging box partial printing and shaping device according to claim 1, characterized in that, The cleaning assembly includes a second bracket, a telescopic cylinder disposed on the upper end of the second bracket, a brush strip connected to the telescopic end of the telescopic cylinder, and bristles disposed on the lower surface of the brush strip; the telescopic cylinder drives the brush strip to move radially, thereby cleaning the upper surface of the packaging box by means of the bristles.

9. The packaging box partial printing and shaping device according to claim 1, characterized in that, The curing and shaping mechanism includes a third support, a lifting cylinder located at the upper end of the third support, and a box connected to the lower end of the lifting cylinder. The top wall of the box is equipped with an ultraviolet lamp tube for ink curing and shaping.

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