Classifying and stacking mechanism for processing watermark paperboard packaging boxes

By designing a sorting and stacking mechanism for watermarked cardboard packaging boxes, the problem of low efficiency in manual sorting was solved, and automated collection and stable conveying of packaging boxes were achieved. This mechanism is adaptable to packaging boxes of different sizes and reduces labor input.

CN121534931APending Publication Date: 2026-02-17YANTAI DAHE PRINTING CO LTD
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Patent Information

Application Number
CN202610053144.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-15
Publication Date
2026-02-17

AI Technical Summary

Technical Problem

In the current technology, the production of watermarked cardboard packaging boxes requires manual sorting and collection of packaging boxes of different sizes, which is inefficient and has a low degree of automation, resulting in a waste of labor.

Method used

A sorting and stacking mechanism for processing watermarked cardboard packaging boxes was designed, including a conveying structure, a transmission frame, side baffles and a size adjuster. The packaging boxes are conveyed to a designated position by inertia and extrusion force, and automatically sorted and collected by the size adjuster and collection through holes.

Benefits of technology

It enables automated sorting and collection of packaging boxes of different sizes, improving efficiency, reducing labor costs, adapting to various non-standard customized packaging boxes, and providing high transmission stability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a classifying and stacking mechanism for processing watermark paperboard packaging boxes, which belongs to the technical field of stainless steel plate processing, and comprises a conveying structure for collecting and conveying packaging boxes with different sizes, a transmission frame used for transmitting packaging boxes is arranged at the transmission tail end of the transmission structure, two side baffles used for limiting and supporting are fixedly connected to the two sides of the transmission frame, and a plurality of size adjusters used for screening the sizes of the packaging boxes are horizontally installed at the positions of the two side baffles. According to the packaging box sorting and stacking device, through the sorting and stacking mechanism, packaging boxes of different models on a production line can be collected in a centralized mode, the packaging boxes of different models are sequentially conveyed to the conveying frame through the conveying structure to be collected, the mechanical degree is high, the labor cost is effectively reduced, and the packaging box sorting and stacking efficiency is effectively improved.
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Description

Technical Field

[0001] This invention belongs to the field of paperboard production and stacking technology, specifically relating to a sorting and stacking mechanism for processing watermarked paperboard packaging boxes. Background Technology

[0002] Watermarked cardboard boxes are packaging containers with watermarked patterns or text printed on the surface of cardboard. Water-based inks contain little or no volatile organic compounds, are non-toxic and odorless, and are very suitable for packaging products with high safety requirements, such as food, medicine, toys, and electronic products. In the current technology, during the production of packaging boxes, watermark printing is first applied to the surface of the packaging box. After printing, the boxes can be cut and crimped to make the carton folded. In the current technology, after the boxes of different sizes are cut and crimped, they need to be collected manually and then bundled together. Manual sorting and collection is inefficient, has a low degree of automation, and high labor costs. Moreover, each production line requires one or more workers to collect the packaging boxes, resulting in excessive labor input and waste of labor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automatic sorting and stacking equipment for packaging boxes.

[0004] The technical solution adopted to solve the above technical problems is: a sorting and stacking mechanism for processing watermarked cardboard packaging boxes, including a conveying structure for collecting and conveying packaging boxes of different sizes, wherein a conveying frame for conveying packaging boxes is provided at the conveying end position of the conveying structure, and two side baffles for limiting support are fixedly connected to both sides of the conveying frame.

[0005] Through the above technical solution, the conveying structure can collect and convey packaging boxes of different sizes after they come off the production line. When the packaging boxes are conveyed to the surface of the conveyor frame, they move to the designated size position under the action of inertia and the squeezing force of the packaging boxes behind them. The side baffles can block the two sides of the conveyor frame and can also support the installation of the size adjuster.

[0006] Several size adjusters for screening packaging box sizes are horizontally installed at the positions of the two side baffles.

[0007] Through the above technical solution, the size adjuster can adapt to packaging boxes of different sizes and screen packaging boxes of different sizes.

[0008] A collection cabinet is fixedly connected to the bottom of the transmission frame. A corresponding collection through hole is opened on the surface of the transmission frame at the position of the size adjuster. A collection box is set inside the collection cabinet at the position directly below the collection through hole. A protective cabinet door is set on the side of the collection cabinet at the position of the collection through hole.

[0009] Through the above technical solution, the collection cabinet can support and fix the transmission frame, the collection through hole can classify the packaging boxes of the corresponding size, and the classified packaging boxes can be collected in the collection box. The protective cabinet door can seal the collection cabinet.

[0010] Furthermore, the side baffle has three evenly distributed through adjustment holes at the size adjuster position. The size adjuster includes a transverse adjustment plate that is slidably connected to the bottom of the side baffle. A side guide plate is slidably connected to the surface of the transverse adjustment plate. A fixing bolt is fixedly connected to the middle of the outer side of the side guide plate, and two symmetrically arranged guide rods are fixedly connected to the outer side of the side guide plate on both sides of the fixing bolt.

[0011] Through the above technical solution, the through adjustment hole can be used to adjust and correct the side guide plate, so that the packaging box can fall accurately into the collection box of the corresponding collection through hole when it moves along the middle of the conveyor frame. The upper surface of the transverse adjustment plate is flush with the upper surface of the conveyor frame, which allows the packaging box to be conveyed normally. The side guide plate supports the packaging box, and the fixing bolt can adjust the distance between the two symmetrical side guide plates to adapt to packaging boxes of different sizes. The guide rod allows the side guide plate to slide normally at the side baffle position.

[0012] Furthermore, the guide rod and the fixing bolt are slidably connected to the corresponding through adjustment hole. The fixing bolt is threaded with a positioning nut at the outer position of the side directional plate. A support spring is fixedly connected between the side directional plate and the side baffle, and the support spring is concentrically arranged with the corresponding guide rod or fixing bolt.

[0013] With the above technical solution, the positioning nut can be adjusted after the side guide plate position is adjusted to avoid abnormal reset. Under the action of the support spring, the two corresponding side guide plates are kept in a symmetrical state. Under the action of the support spring, the side guide plates can be pushed inward, so that the packaging box is kept in the middle position of the guide frame.

[0014] Furthermore, two symmetrically arranged arc-shaped guide plates are fixedly connected to the two sides of the side directional plate. Elastic cloth is fixedly connected to both ends of the inner side of the side baffle. An adjustment scale is etched on the surface of the transmission frame at the edge of the collection through hole. The transmission frame is inclined on the side near the conveying structure, and guide rollers are rotatably connected between the side baffles at the inclined position of the transmission frame. A fixed support frame is fixedly connected between the lower surfaces of the two transmission frames and the conveying structure.

[0015] Through the above technical solutions, the guide arc plate can adapt to the packaging box, making the elastic cloth more rounded at the corner position, avoiding the packaging box getting stuck at the corner and affecting normal transmission. The elastic cloth ensures that there are no gaps between the side guide plates, facilitating transmission. The adjustment scale can precisely adjust the position of the side guide plates and the transverse adjustment plate to adapt to packaging boxes of different sizes. The conveyor frame is set at an inclination on the side close to the conveying structure, allowing the packaging box to slide automatically and gain a certain inertia. The guide roller can convey folded packaging boxes, preventing the packaging boxes in front from falling when squeezed by the packaging boxes behind. The fixed support frame can connect the conveyor frame and the conveying support frame.

[0016] Furthermore, the conveying structure includes a conveying support frame placed on the ground, a conveyor belt assembly is provided at the position of the conveying support frame, a plurality of evenly distributed extrusion plates are fixedly connected to the surface of the conveyor belt of the conveyor belt assembly, a reduction motor is fixedly connected to the bottom of the conveying support frame, and the drive end of the reduction motor is connected to the power input end of the conveyor belt assembly through the conveyor belt assembly.

[0017] Through the above technical solution, the geared motor can provide power, which is transmitted through the conveyor belt assembly to enable the conveyor belt assembly to operate, collect the packaging boxes of various models and convey them to the surface of the conveyor frame for classification. The extrusion plate can squeeze the packaging boxes to prevent the packaging boxes at the conveyor frame position from being unable to move due to lack of power.

[0018] Furthermore, the collection box includes a collection box body placed inside the collection cabinet. One side of the collection box body is open, and an "L"-shaped transfer tray is slidably connected to the opening. Two symmetrically arranged elastic grooves are opened on one side of the collection box body near the upper corner. Locking blocks are slidably connected to the elastic grooves, and a lifting spring is fixedly connected between the lower surface of the locking block and the bottom wall of the elastic groove.

[0019] With the above technical solution, the main body of the collection box serves as the main body for collecting different types of packaging boxes. The opening position can be used to place a transfer tray. The sorted packaging boxes can slide down and be collected in the transfer tray. After collection, the transfer tray can be pulled out to remove the collected packaging boxes. The elastic groove is directly opposite the locking groove below the horizontal adjustment plate, so that the edge of the horizontal adjustment plate is directly opposite the inside of the main body of the collection box, which makes it easy for the packaging boxes to fall accurately into the main body of the collection box. The locking block is inserted into the locking groove to fix the main body of the collection box on the horizontal adjustment plate, and the sliding locking block can be adjusted by compressing the lifting spring.

[0020] Furthermore, the lower surface of the side baffle is provided with an installation groove at the position of the size adjuster, the lower surface of the transverse adjustment plate is provided with a bottom groove on one side of the installation groove, and a side groove is provided through the transverse adjustment plate near the bottom groove.

[0021] Furthermore, an adjusting bolt is fixedly connected to the inner wall of the mounting groove. The adjusting bolt extends through the side groove to the bottom groove, and the portion of the adjusting bolt located in the bottom groove is threadedly connected to a fastening nut.

[0022] The above technical solution involves sliding the horizontal adjustment plate and measuring the adjustment position using an adjustment scale. The distance between two symmetrical horizontal adjustment plates at the corresponding positions is the appropriate size for the packaging box. After adjustment, the fastening nut can be rotated to secure the horizontal adjustment plate.

[0023] Furthermore, a locking groove is provided on the lower surface of the horizontal adjustment plate at a position directly above the locking block, and the locking block is slidably connected to the inner wall of the locking groove.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention can collect various types of packaging boxes on the production line through the classification and stacking mechanism, and then transfer them sequentially on the conveyor frame through the conveyor structure. The packaging boxes of different types are collected in a high degree of mechanization, effectively reducing labor costs and improving the efficiency of packaging box classification and stacking; (2) The present invention has a size adjustment on the conveyor frame, which can adjust the distance of the collection through hole position, effectively collect packaging boxes of different sizes, and the adjustment method is stepless and precise, which can adapt to a variety of non-standard customized packaging boxes. During the transfer, the packaging boxes are transferred in the center of the conveyor frame, making the classification and stacking more stable. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention; Figure 2 This is a second-view structural diagram of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention; Figure 3 This is a three-dimensional structural diagram of the transmission frame of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention; Figure 4 This is a fixed installation diagram of the transmission frame of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention; Figure 5 yes Figure 1 A bottom view at point A in the middle; Figure 6 This is a structural diagram of a size adjuster for a sorting and stacking mechanism used in the processing of watermarked cardboard packaging boxes according to the present invention; Figure 7 This is an exploded view of the collection box of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention; Figure 8 This is a bottom view of the size adjuster of a sorting and stacking mechanism for processing watermarked cardboard packaging boxes according to the present invention.

[0026] Reference numerals: 1. Conveyor support frame; 2. Conveyor belt assembly; 3. Gear motor; 4. Side baffle; 5. Fixed support frame; 6. Size adjuster; 60. Transverse adjustment plate; 61. Bottom groove; 62. Fastening nut; 63. Mounting groove; 64. Adjusting bolt; 65. Side groove; 66. Fixing bolt; 67. Positioning nut; 68. Support spring; 69. Side directional plate; 610. Guide arc plate; 611. Guide rod; 612. Locking groove; 7. Collection cabinet; 8. Protective cabinet door; 9. Adjustment scale; 10. Conveyor frame; 11. Conveyor belt assembly; 12. Extrusion plate; 13. Elastic cloth; 14. Collection through hole; 15. Through adjustment hole; 16. Collection box body; 160. Collection box body; 161. Lifting spring; 162. Locking block; 163. Elastic groove; 164. Transfer tray; 17. Guide roller. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] like Figure 1-8 As shown in the figure, a sorting and stacking mechanism for processing watermarked cardboard packaging boxes in this embodiment includes a conveying structure for collecting and conveying packaging boxes of different sizes. The conveying end of the conveying structure is provided with a conveyor frame 10 for conveying the packaging boxes, and two side baffles 4 for limiting support are fixedly connected to both sides of the conveyor frame 10. The conveying structure can collect and convey packaging boxes of different sizes after they come off the production line. When the packaging box is conveyed to the surface of the conveyor frame 10, it moves to a specified size position under the action of inertia and the squeezing force of the packaging box behind it. The side baffles 4 can block the two sides of the conveyor frame 10 and can support the installation of the size adjuster 6.

[0029] The conveying structure includes a conveying support frame 1 placed on the ground. A conveyor belt assembly 11 is installed on the conveying support frame 1. Several evenly distributed extrusion plates 12 are fixedly connected to the surface of the conveyor belt of the conveyor belt assembly 11. A geared motor 3 is fixedly connected to the bottom of the conveying support frame 1. The drive end of the geared motor 3 is connected to the power input end of the conveyor belt assembly 11 through the conveyor belt assembly 2. The geared motor 3 can provide power, which is transmitted through the conveyor belt assembly 2 to enable the conveyor belt assembly 11 to operate. The various types of packaging boxes are collected and then conveyed to the surface of the conveyor frame 10 for classification. The extrusion plates 12 can extrude power to the packaging boxes, preventing the packaging boxes at the position of the conveyor frame 10 from being unable to move due to lack of power.

[0030] Several size adjusters 6 for screening packaging boxes are horizontally installed at the positions of the two side baffles 4. The size adjusters 6 can adapt to packaging boxes of different sizes and screen them accordingly. Three evenly distributed through adjustment holes 15 are provided through the side baffles 4 at the positions of the size adjusters 6. The size adjuster 6 includes a transverse adjustment plate 60 that is slidably connected to the bottom of the side baffle 4. A side guide plate 69 is slidably connected to the surface of the transverse adjustment plate 60. A fixing bolt 66 is fixedly connected to the middle position of the outer side of the side guide plate 69, and the outer side of the side guide plate 69 is fixed on both sides of the fixing bolt 66. Two symmetrically arranged guide rods 611 are connected, and the through adjustment hole 15 allows for adjustment and correction of the side guide plate 69, so that the packaging box can move along the middle of the conveyor frame 10 and fall accurately into the collection box 16 with the corresponding collection through hole 14. The upper surface of the transverse adjustment plate 60 is flush with the upper surface of the conveyor frame 10, which allows the packaging box to be conveyed normally. The side guide plate 69 supports the packaging box, and the fixing bolt 66 can adjust the distance between the two symmetrical side guide plates 69 to accommodate packaging boxes of different sizes. The guide rods 611 allow the side guide plate 69 to slide normally at the side baffle 4 position.

[0031] Two symmetrically arranged arc-shaped guide plates 610 are fixedly connected to the two sides of the side guide plate 69. Elastic cloth 13 is fixedly connected to both ends of the inner side of the side baffle 4. An adjustment scale 9 is etched on the surface of the conveyor frame 10 at the edge of the collection through hole 14. The conveyor frame 10 is inclined near the conveying structure, and guide rollers 17 are rotatably connected between the side baffles 4 at the inclined position of the conveyor frame 10. A fixed support frame 5 is fixedly connected between the lower surfaces of the two conveyor frames 10 and the conveying structure. The guide arc plates 610 can adapt to the packaging box, making the elastic cloth 13 more rounded at the corner. The sliding mechanism prevents the corners of the packaging boxes from getting stuck and affecting normal conveying. The elastic cloth 13 ensures that there are no gaps between the side guide plates 69, facilitating conveying. The adjustable scale 9 allows for precise adjustment of the positions of the side guide plates 69 and the transverse adjustment plate 60, thus adapting to packaging boxes of different sizes. The conveyor frame 10 is inclined on the side closest to the conveying structure, allowing the packaging boxes to slide automatically and gain a certain inertia. The guide roller 17 can convey folded packaging boxes, preventing the packaging boxes in front from falling off when squeezed by the packaging boxes behind. The fixed support frame 5 can connect the conveyor frame 10 to the conveying support frame 1.

[0032] The guide rod 611 and the fixing bolt 66 are slidably connected to the corresponding through adjustment hole 15. The fixing bolt 66 is located on the outside of the side guide plate 69 and is threadedly connected to the positioning nut 67. The side guide plate 69 and the side baffle 4 are fixedly connected to the support spring 68, and the support spring 68 is concentrically set with the corresponding guide rod 611 or fixing bolt 66. The positioning nut 67 can be adjusted after the side guide plate 69 is adjusted to avoid abnormal reset. Under the action of the support spring 68, the two corresponding side guide plates 69 are kept symmetrical. Under the action of the support spring 68, the side guide plates 69 can be pushed inward, so that the packaging box is kept in the middle position of the guide frame 10.

[0033] The lower surface of the side baffle 4 is provided with a mounting groove 63 at the position of the size adjuster 6. The lower surface of the transverse adjustment plate 60 is provided with a bottom groove 61 on one side of the mounting groove 63. A side groove 65 is provided through the transverse adjustment plate 60 near the bottom groove 61 and the bottom groove 61.

[0034] A locking groove 612 is provided on the lower surface of the horizontal adjustment plate 60, located directly above the locking block 162, and the locking block 162 is slidably connected to the inner wall of the locking groove 612.

[0035] An adjusting bolt 64 is fixedly connected to the inner wall of the mounting groove 63. The adjusting bolt 64 extends through the side groove 65 to the bottom groove 61. The portion of the adjusting bolt 64 located in the bottom groove 61 is threadedly connected to a fastening nut 62. By sliding the transverse adjustment plate 60 and measuring the adjustment position by adjusting the scale 9, the distance between the two symmetrical transverse adjustment plates 60 at the corresponding positions is the size of the packaging box. After adjustment, the fastening nut 62 can be rotated to fasten and fix the transverse adjustment plate 60.

[0036] A collection cabinet 7 is fixedly connected to the bottom of the conveyor frame 10. A corresponding collection through hole 14 is opened on the surface of the conveyor frame 10 at the position of the size adjuster 6. A collection box 16 is set inside the collection cabinet 7 directly below the collection through hole 14. A protective cabinet door 8 is set on the side of the collection cabinet 7 at the position of the collection through hole 14. The collection cabinet 7 can support and fix the conveyor frame 10. The collection through hole 14 can classify the packaging boxes of the corresponding size, and the classified packaging boxes can be collected in the collection box 16. The protective cabinet door 8 can seal the collection cabinet 7.

[0037] The collection box 16 includes a collection box body 160 placed inside the collection cabinet 7. One side of the collection box body 160 is open, and an "L"-shaped transfer tray 164 is slidably connected to the opening. Two symmetrically arranged elastic grooves 163 are located near the upper corner of one side of the collection box body 160. Locking blocks 162 are slidably connected to the elastic grooves 163. A lifting spring 161 is fixedly connected between the lower surface of the locking block 162 and the inner bottom wall of the elastic groove 163. The collection box body 160 serves as the main body for collecting different types of packaging boxes, and the opening can accommodate the transfer tray 164. The transfer tray 164 allows the screened packaging boxes to slide down and be collected. After collection, the transfer tray 164 can be pulled out to remove the collected packaging boxes. The elastic groove 163 is aligned with the locking groove 612 below the horizontal adjustment plate 60, so that the edge of the horizontal adjustment plate 60 is aligned with the inside of the collection box body 160, making it easy for the packaging boxes to fall accurately into the collection box body 160. The locking block 162 is inserted into the locking groove 612 to fix the collection box body 160 on the horizontal adjustment plate 60, and the sliding locking block 162 can be adjusted by compressing the lifting spring 161.

[0038] The working principle of this embodiment is as follows: packaging boxes of different sizes and models on the production line are collected on the surface of the conveyor belt assembly 11 by the conveyor belt. By starting the reduction motor 3, the packaging boxes can be conveyed to the position of the conveyor frame 10. The packaging boxes are pressed under the guide roller 17 and squeezed by the packaging boxes conveyed from the rear, so that the packaging boxes in front slide normally. The packaging boxes will squeeze the side directional plates 69. Under the squeezing action of the two side directional plates 69, the packaging boxes are always conveyed on the surface of the conveyor frame 10. Smaller-sized packaging boxes slide into the corresponding collection box 16 near the collection through hole 14 of the conveyor support frame 1. Once the collection box 16 is full, the protective cabinet door can be opened, and the transfer tray 164 can be pulled out to remove the stacked packaging boxes. Before use, the horizontal adjustment plate 60 can be slid to make the distance between the horizontal adjustment plates 60 adapt to the size of the corresponding packaging box. After adjustment, the fastening nut 62 is tightened and fixed. The distance between the two horizontal adjustment plates 60 increases sequentially from the conveyor support frame 1 to the side of the conveyor frame 10 away from the conveyor support frame 1, so that the smaller packaging boxes are collected first.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A sorting and stacking mechanism for processing of watermarked cardboard packaging boxes, comprising a conveying structure for collecting and conveying packaging boxes of different sizes, characterized in that: The conveying end position of the conveying structure is provided with a conveying frame (10) for conveying the packaging box, and two side edge baffles (4) for limiting support are fixedly connected on both sides of the conveying frame (10); A plurality of size adjusters (6) for screening the size of the packaging box are horizontally installed at the positions of the two side edge baffles (4); The bottom of the conveying frame (10) is fixedly connected with a collection cabinet (7), a corresponding collection through hole (14) is formed through the surface of the conveying frame (10) at the position of the size adjuster (6), a collection box (16) is arranged below the collection through hole (14) in the collection cabinet (7), and a protection cabinet door (8) is arranged on the side of the collection cabinet (7) at the position of the collection through hole (14).

2. The sorting and stacking mechanism for processing of watermarked paperboard packaging boxes according to claim 1, characterized in that, Three uniformly distributed through adjustment holes (15) are formed through the side edge baffles (4) at the positions of the size adjusters (6), the size adjuster (6) comprises a horizontal movement adjusting plate (60) which is slidably connected with the bottom of the side edge baffle (4), a side directional plate (69) is slidably connected to the surface of the horizontal movement adjusting plate (60), a fixed bolt (66) is fixedly connected to the middle of the outer side of the side directional plate (69), and two symmetrically arranged guide rods (611) are fixedly connected to the outer side of the side directional plate (69) at the positions of the fixed bolt (66).

3. The sorting and stacking mechanism for processing of watermarked cardboard packaging boxes according to claim 2, characterized in that, The guide rods (611), the fixed bolt (66) and the corresponding through adjustment holes (15) are in through sliding connection, a positioning nut (67) is threadedly connected to the outer side of the side directional plate (69) at the position of the fixed bolt (66), a supporting spring (68) is fixedly connected between the side directional plate (69) and the side edge baffle (4), and the supporting spring (68) is concentrically arranged with the corresponding guide rod (611) or the fixed bolt (66).

4. The sorting and stacking mechanism for processing of watermarked cardboard packaging boxes according to claim 3, characterized in that, Two symmetrically arranged arc-shaped guide arc plates (610) are fixedly connected to the surfaces on both sides of the side directional plate (69), elastic cloth (13) is fixedly connected to the inner sides of the side edge baffles (4) at both ends, an adjusting scale (9) is etched on the surface of the conveying frame (10) at the edge of the collection through hole (14), the conveying frame (10) is arranged in an inclined manner on the side close to the conveying structure, guide rollers (17) are rotatably connected between the side edge baffles (4) at the inclined position of the conveying frame (10), and a fixed support frame (5) is fixedly connected between the lower surfaces of the two conveying frames (10) and the conveying structure.

5. The sorting and stacking mechanism for processing of watermarked paperboard packaging boxes according to claim 1, characterized in that, The conveying structure comprises a conveying support frame (1) placed on the ground, the conveying support frame (1) is provided with a conveying belt assembly (11), a plurality of evenly distributed extrusion plates (12) are fixedly connected to the surface of the conveying belt of the conveying belt assembly (11), a reduction motor (3) is fixedly connected to the bottom of the conveying support frame (1), and the driving end of the reduction motor (3) is connected with the power input end of the conveying belt assembly (11) through a conveying belt assembly (2).

6. The sorting and stacking mechanism for processing of watermarked cardboard packaging boxes according to claim 2, characterized in that, The collection box (16) includes a collection box body (160) placed in the collection cabinet (7), one side of the collection box body (160) is provided with an opening, and the opening is slidably connected with a transfer tray (164) provided in an "L" shape. Two symmetrically arranged elastic grooves (163) are arranged at the corner position near the upper side of the collection box body (160), and a locking block (162) is slidably connected at the position of the elastic groove (163). The bottom surface of the locking block (162) is fixedly connected with a jack-up spring (161) between the inner bottom wall of the elastic groove (163).

7. The sorting and stacking mechanism for processing of watermarked cardboard packaging boxes according to claim 2, characterized in that, The lower surface of the side baffle (4) is provided with a mounting groove (63) at the position of the size adjuster (6). The lower surface of the transverse adjustment plate (60) is provided with a bottom groove (61) at one side of the mounting groove (63). The transverse adjustment plate (60) is provided with a side groove (65) penetrating between the side close to the bottom groove (61) and the bottom groove (61).

8. The sorting and stacking mechanism for processing of watermarked paperboard packaging boxes according to claim 7, characterized in that: The inner wall of the mounting groove (63) is fixedly connected with an adjusting bolt (64). The adjusting bolt (64) extends into the bottom groove (61) through the side groove (65). The part of the adjusting bolt (64) in the bottom groove (61) is threadedly connected with a fastening nut (62).

9. The sorting and stacking mechanism for processing of watermarked paperboard packaging boxes according to claim 6, characterized in that: The lower surface of the transverse adjustment plate (60) is provided with a locking groove (612) at the position directly above the locking block (162), and the locking block (162) and the locking groove (612) are slidably connected.