A carton overwrap packaging system and method

Abstract

This invention discloses a carton outer packaging paper packaging system and method. The packaging system includes an outer packaging paper cutting and positioning mechanism, a second rotary conveying mechanism, a carton outer packaging paper folding channel, and a carton product output channel, all arranged along the packaging process. The outer packaging paper cutting and positioning mechanism includes a frame with a fixed plate. From bottom to top, a conveying roller and a cutting roller are arranged on the fixed plate. Above the cutting roller is a first positioning suction plate, which has a lower guide plate and an upper guide plate. The upper guide plate has a position sensor for detecting the outer packaging paper being conveyed upwards and sending a signal to the drive source of the cutting roller. The gap between the lower and upper guide plates is used to receive the carton being conveyed and to pre-wrap the cut outer packaging paper onto the carton. This invention allows for easy switching of the sealing position of the outer packaging paper on the large or small surface of the carton, meeting diverse user needs for the sealing position of the outer packaging paper.

Description

Technical Field

[0001] This invention belongs to the field of packaging machinery technology, specifically relating to a strip box outer packaging paper packaging system and packaging method. Background Technology

[0002] Packaging machinery and equipment are technical devices that complete the production process to protect goods entering the market, facilitate circulation, promote sales, and increase added value. Small packages of goods are bundled into strips to form carton boxes. The outer packaging paper needs to be placed on the outside of the carton box. Regarding the packaging of the carton box outer packaging paper, according to the printed pattern and tear requirements, users generally have two requirements for the sealing position of the carton box outer packaging paper: sealing the outer packaging paper on the large or small face along the length of the carton.

[0003] Currently available packaging machinery and equipment are typically designed for one type of sealing position. Due to limitations in the packaging process, the packaging and sealing processes for the outer packaging paper of carton are fixed, making it difficult to change according to different user needs and meet users' demands for diverse and flexible sealing positions for the outer packaging paper of carton. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the present invention provides a carton outer packaging paper packaging system and packaging method, which can easily switch the sealing position of the carton outer packaging paper on the large or small surface of the carton, and can meet the diverse needs of users for the sealing position of the carton outer packaging paper.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A carton outer packaging paper packaging system includes an outer packaging paper cutting and positioning mechanism, a second rotary conveying mechanism, a carton outer packaging paper folding channel, and a carton product output channel arranged along the packaging process. The outer packaging paper cutting and positioning mechanism includes a frame with an adjustable mounting plate. From bottom to top, the fixed plate has a conveying roller and a cutting roller for the outer packaging paper. Above the cutting roller is a first positioning suction plate fixedly connected to the fixed plate. The first positioning suction plate has a lower guide plate and an adjustable mounting height upper guide plate. The upper guide plate has an adjustable mounting height position sensor for detecting the outer packaging paper being conveyed upwards and sending a signal to the drive source of the cutting roller. The gap between the lower and upper guide plates is used to receive the carton being conveyed and to pre-wrap the cut outer packaging paper onto the carton. The first positioning suction plate has a through-passage channel for the carton to pass through at the gap between the lower and upper guide plates. The position sensor is used to determine the top height of the conveyed outer packaging paper, thereby determining the sealing position of the outer packaging paper on the large or small surface of the carton.

[0007] Furthermore, upstream of the outer packaging paper cutting and positioning mechanism along the packaging process, there are also a small package conveying and grouping mechanism, a carton label paper conveying mechanism, a carton label paper wrapping and folding channel, and a first rotary conveying mechanism. The first rotary conveying mechanism includes a first rotary roller arranged horizontally in the front-back direction. Multiple first slots are evenly distributed on the roller surface of the first rotary roller in the circumferential direction for locking the carton with the label paper wrapped. The first rotary roller rotates clockwise intermittently and is used to flip the carton in the first slot 180° and convey it to the gap between the lower guide plate and the upper guide plate.

[0008] Furthermore, both the conveying roller and the cutting roller are arranged horizontally in the front-to-back direction, with the cutting roller positioned directly above the conveying roller. A driven roller parallel to the conveying roller is located on the right side of the conveying roller. The conveying roller and the driven roller are driven by gears and rotate in opposite directions. Both the conveying roller and the driven roller are suction rollers, creating negative pressure on their surfaces through suction. Above the gap between the conveying roller and the driven roller, two second positioning suction plates are arranged vertically in the front-to-back direction and fixedly connected to a fixed plate. A cutting blade is provided on the surface of the cutting roller. The top of the second positioning suction plate on the left side is lower than the height of the cutting roller's axis. The right side of the second positioning suction plate is flush with the right side of the first positioning suction plate. The lower guide plate and the upper guide plate are both arranged horizontally in the front-back direction, and the left ends of the lower guide plate and the upper guide plate are separated from the right side of the first positioning suction plate. The conveying roller and the driven roller rotate in opposite directions and cooperate to allow the outer packaging paper to pass through the gap between the conveying roller and the driven roller and be conveyed upward along the gap between the two second positioning suction plates. The outer packaging paper is also conveyed upward along the right side of the first positioning suction plate to the left side of the lower guide plate and the upper guide plate. The cutting blade rotates with the cutting roller to the left side of the second positioning suction plate and is used to cut the upward conveyed outer packaging paper.

[0009] Furthermore, the first positioning suction plate is symmetrically provided with guide blocks at the front and rear of the gap between the lower guide plate and the upper guide plate. The guide blocks are provided with sliders that slide in cooperation with the horizontal groove on the left side of the first positioning suction plate. The guide blocks slide to the corresponding position of the gap between the lower guide plate and the upper guide plate and are fastened to the first positioning suction plate by fasteners. The two guide blocks cooperate with the lower guide plate and the upper guide plate to form a strip box transition channel. The strip box transition channel is used to fold the cut outer packaging paper to the right along the two horizontal long edges of one side of the strip box, and to fold the outer packaging paper at an angle along the two vertical short edges of the corresponding side of the strip box.

[0010] Furthermore, the second rotary conveying mechanism includes a second rotary roller parallel to the first rotary roller. Multiple second slots are evenly distributed along the circumferential direction on the surface of the second rotary roller for securing the pre-wrapped outer packaging paper in the carton. A fixed folding guide plate is provided on the outer side of each second slot on the second rotary roller. The outer packaging paper is sealed on the large surface of the carton. During intermittent clockwise rotation of the second rotary roller, the fixed folding guide plate folds the outer packaging paper along one horizontal long edge on the other side of the carton, sealing the outer packaging paper on the small surface of the carton. When the fixed folding guide plate is removed and the second rotary roller rotates intermittently clockwise, it flips the carton in the second slot to 90°. A movable folding device below the second rotary roller folds the outer packaging paper along two horizontal long edges on the other side of the carton. The second rotary roller rotates and flips the carton in the second slot 180°, conveying it into the outer packaging paper folding channel of the carton.

[0011] Furthermore, a notched cutting roller is provided between the conveying roller and the cutting roller, arranged horizontally in the front-to-back direction. The notched cutting roller is located directly below the cutting roller. The notched cutting roller and the cutting roller are driven by gears and rotate in the same direction. The roller surface of the notched cutting roller is provided with a U-shaped cutting blade for cutting the upwardly conveyed outer packaging paper and forming a U-shaped cutting line. The cutting blade is provided with a U-shaped groove at a position corresponding to the U-shaped cutting blade. The cutting blade and the U-shaped cutting blade cooperate to form a U-shaped notch at the upper end and a U-shaped protrusion at the lower end of the cut outer packaging paper.

[0012] Furthermore, the fixing plate is vertically arranged in the left-right direction. The fixing plate has multiple vertical first elongated holes. The fixing plate is fixedly connected to the frame by first fastening bolts passing through the first elongated holes. The installation height of the fixing plate on the frame can be adjusted by adjusting the position of the first fastening bolts in the first elongated holes. The first positioning suction plate has multiple vertical second elongated holes. The upper guide plate is fixedly connected to the first positioning suction plate by second fastening bolts passing through the second elongated holes. The installation height of the upper guide plate on the first positioning suction plate can be adjusted by adjusting the position of the second fastening bolts in the second elongated holes. There are two position sensors symmetrically arranged at the front and rear of the top surface of the upper guide plate. Multiple gaskets are provided between the position sensors and the top surface of the upper guide plate. The installation height of the position sensors on the upper guide plate can be adjusted by adjusting the number of gaskets. The two position sensors work together to detect the outer packaging paper being conveyed upwards into position.

[0013] Furthermore, the cutting roller is driven by a first servo motor, and the conveying roller is driven by a second servo motor. Both the first and second servo motors are mounted on a fixed plate.

[0014] A packaging method for sealing the edges of a carton's outer packaging paper on the large surface of the carton, using the aforementioned carton outer packaging paper packaging system, includes the following steps:

[0015] S1. The installation height of the fixed plate, the upper guide plate and the position sensor are pre-adjusted. The position sensor detects the outer packaging paper that is conveyed upward and sends a signal to the drive source of the cutting roller. The cutting roller rotates and cuts the outer packaging paper with the cutting knife. The strip box transition channel folds the cut outer packaging paper to the right along the two horizontal long edges of the strip box that is conveyed to the position, and folds the outer packaging paper at the corners along the two vertical short edges of the corresponding side of the strip box to complete the pre-wrapping of the outer packaging paper of the strip box. The strip box is pushed into the corresponding second slot of the second rotating roller.

[0016] S2. The second rotating roller rotates intermittently clockwise, and during the rotation, the fixed folding guide plate folds the outer packaging paper along one of the horizontal long edges of the other side of the carton. When the second rotating roller rotates to 180°, the carton in the second slot is flipped 180° and conveyed to the outer packaging paper folding channel of the carton. The fixed guide block in the outer packaging paper folding channel of the carton folds the outer packaging paper along the last horizontal long edge of the other side of the carton and folds the outer packaging paper along the two vertical short edges of the other side of the carton, so that the two long edges of the outer packaging paper overlap on the large surface of the carton. During the conveying process, the fixed folder in the outer packaging paper folds the outer packaging paper along the four horizontal short edges of the carton and heats and seals the large surface and the front and back sides of the carton. Finally, the carton product is output through the carton product output channel.

[0017] A packaging method for sealing the edges of a carton's outer packaging paper on a small surface of the carton, using the aforementioned carton outer packaging paper packaging system, includes the following steps:

[0018] (1) Pre-adjust the installation height of the fixed plate, the upper guide plate and the position sensor. The position sensor detects the outer packaging paper that is conveyed upward and sends a signal to the drive source of the cutting roller. The cutting roller rotates and cuts the outer packaging paper through the cutting knife. The strip box transition channel folds the cut outer packaging paper to the right along the two horizontal long edges of the strip box that is conveyed to the position, and folds the outer packaging paper at the corners along the two vertical short edges of the corresponding side of the strip box to complete the pre-wrapping of the outer packaging paper of the strip box. The strip box is pushed into the corresponding second slot of the second rotating roller, and the fixed folding guide plate is removed in advance.

[0019] (2) When the second rotating roller rotates clockwise intermittently to 90°, the carton in the second slot is flipped 90°. The movable folding device below the second rotating roller folds the outer packaging paper along the two long edges of the other side of the carton, so that the two long edges of the outer packaging paper overlap on the small surface of the carton, and heat seals the small surface of the carton. When the second rotating roller rotates to 180°, the carton in the second slot is flipped 180° and transported to the outer packaging paper folding channel of the carton. The fixed guide block in the outer packaging paper folding channel of the carton folds the outer packaging paper along the two vertical short edges of the other side of the carton. During the conveying process, the fixed folding device in the outer packaging paper folds the outer packaging paper along the four horizontal short edges of the carton and heat seals the front and rear sides of the carton. Finally, the carton product is output through the carton product output channel.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The carton outer packaging paper packaging system of the present invention includes an outer packaging paper cutting and positioning mechanism, a second rotary conveying mechanism, a carton outer packaging paper folding channel, and a carton product output channel arranged along the packaging process. The outer packaging paper cutting and positioning mechanism includes a frame, on which a fixed plate with adjustable installation height is provided. From bottom to top, a conveying roller and a cutting roller of outer packaging paper are arranged on the fixed plate. Above the cutting roller is a first positioning suction plate fixedly connected to the fixed plate. The first positioning suction plate is provided with a lower guide plate and an upper guide plate with adjustable installation height. The upper guide plate is provided with a position sensor with adjustable installation height for detecting the outer packaging paper conveyed upward and sending a signal to the drive source of the cutting roller. The gap between the lower guide plate and the upper guide plate is used to receive the carton conveyed to the position and cooperate to pre-wrap the cut outer packaging paper onto the carton. The first positioning suction plate is provided with a space for the carton at the gap between the lower guide plate and the upper guide plate. The through-channel allows position sensors to determine the top height of the conveyed outer packaging paper, thus determining the sealing position of the outer packaging paper on the large or small surface of the carton. By adjusting the mounting height of the fixing plate on the frame, the mounting height of the lower guide plate is adjusted. Similarly, by adjusting the mounting height of the upper guide plate on the first positioning suction plate, the vertical distance between the upper and lower guide plates is adjusted. This ensures that cartons of different heights can be conveyed to the gap between the lower and upper guide plates, facilitating the wrapping of cartons of varying heights with outer packaging paper. Furthermore, adjusting the mounting height of the position sensor on the upper guide plate adjusts the top height of the conveyed outer packaging paper, thereby adjusting the sealing position of the outer packaging paper on the large or small surface of the carton. This allows for easy switching of the sealing position of the outer packaging paper on the large or small surface of the carton, meeting diverse user needs for the sealing position of the outer packaging paper.

[0022] In this invention, guide blocks are symmetrically arranged at the front and rear of the gap between the lower guide plate and the upper guide plate on the first positioning suction plate. The guide blocks are equipped with sliders that slide in cooperation with the horizontal grooves on the left side of the first positioning suction plate. The guide blocks slide to the corresponding position of the gap between the lower guide plate and the upper guide plate and are fastened to the first positioning suction plate by fasteners. The two guide blocks cooperate with the lower guide plate and the upper guide plate to form a strip box transition channel. The strip box transition channel is used to fold the cut outer packaging paper to the right along the two horizontal long edges of one side of the strip box, and to fold the outer packaging paper at the corners along the two vertical short edges of the corresponding side of the strip box. In this way, by adjusting the horizontal distance between the front and rear guide blocks, the front and rear length of the strip box transition channel can be adjusted, which makes it easier to wrap the outer packaging paper for strip boxes of different lengths. Moreover, the front and rear guide blocks facilitate the folding of the outer packaging paper along the two vertical short edges of the corresponding side of the strip box.

[0023] In this invention, the second rotary conveying mechanism includes a second rotary roller parallel to the first rotary roller. Multiple second slots are evenly distributed circumferentially on the surface of the second rotary roller for holding the pre-wrapped outer packaging paper in a carton. A fixed folding guide plate is provided on the outer side of each second slot on the second rotary roller. The outer packaging paper is sealed on the larger surface of the carton. During intermittent clockwise rotation of the second rotary roller, the fixed folding guide plate folds the outer packaging paper along a horizontal long edge on the other side of the carton, sealing the smaller surface of the carton. When the fixed folding guide plate is removed and the second rotary roller rotates intermittently clockwise, it flips the carton in the second slot to 90°. A movable folding device below the second rotary roller is used to fold the outer packaging paper... Fold along the two horizontal long edges on the other side of the carton. The second rotating roller rotates and is used to flip the carton in the second slot 180° and transport it into the outer packaging paper folding channel of the carton. In this way, depending on the sealing condition of the outer packaging paper on the large or small side of the carton, it is flexibly decided whether to remove the fixed folding guide plate on the outside of the second slot. When the outer packaging paper is sealed on the small side of the carton, the fixed folding guide plate needs to be removed. When the second rotating roller rotates clockwise intermittently and flips the carton in the second slot to 90°, the outer packaging paper needs to be folded along the two horizontal long edges on the other side of the carton by the movable folding device. Therefore, this carton outer packaging paper packaging system can easily switch the sealing position of the outer packaging paper on the large or small side of the carton. Attached Figure Description

[0024] Figure 1 This is an unfolded view of the label paper of the carton in this invention;

[0025] Figure 2 A schematic diagram illustrating the process of sealing the outer packaging paper of a carton onto the large surface of the carton;

[0026] Figure 3 for Figure 2 A diagram showing another direction;

[0027] Figure 4 A flowchart illustrating the process of sealing the outer packaging paper of a carton onto the small side of the carton.

[0028] Figure 5 for Figure 4 A diagram showing another direction;

[0029] Figure 6 for Figure 5 A diagram showing another direction;

[0030] Figure 7 This is a schematic diagram of the outer packaging paper in this invention;

[0031] Figure 8 This is a three-dimensional structural diagram of the outer packaging paper cutting and positioning mechanism in this invention;

[0032] Figure 9 for Figure 8 A magnified schematic diagram of the position sensor.

[0033] Figure 10 for Figure 8 A schematic diagram of the three-dimensional structure from another direction;

[0034] Figure 11 for Figure 8 A cross-sectional view of the structure from another direction.

[0035] The following are the annotations in the attached diagram: 1. Fixed plate; 2. Conveying roller; 3. Cutting roller; 4. First positioning suction plate; 5. Lower guide plate; 6. Upper guide plate; 7. Position sensor; 8. Outer packaging paper; 801. U-shaped notch; 802. U-shaped protrusion; 9. Carton; 10. Label paper; 11. Driven roller; 12. Second positioning suction plate; 13. Cutting knife; 14. Guide block; 15. Slide groove; 16. Slider; 17. Carton transition channel; 18. Notch cutting roller; 19. First elongated hole; 20. First fastening bolt; 21. Second elongated hole; 22. Second fastening bolt; 23. Gasket; 24. First servo motor; 25. Second servo motor; 26. Small package; 27. Carton goods. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] like Figure 2-6 As shown, a carton outer packaging paper packaging system includes an outer packaging paper cutting and positioning mechanism, a second rotary conveying mechanism, a carton outer packaging paper folding channel, and a carton product output channel, arranged sequentially from right to left along the packaging process. Figure 8-11 As shown, the outer packaging paper cutting and positioning mechanism includes a frame, on which a fixed plate 1 with adjustable installation height is provided. From bottom to top, the fixed plate 1 is provided with a conveying roller 2 for the outer packaging paper 8 and a cutting roller 3. Above the cutting roller 3, there is a first positioning suction plate 4 fixedly connected to the fixed plate 1. The first positioning suction plate 4 is provided with a lower guide plate 5 and an upper guide plate 6 with adjustable installation height. The upper guide plate 6 is provided with a position sensor 7 with adjustable installation height, which is used to detect the outer packaging paper 8 conveyed upward and send the signal to the drive source of the cutting roller 3. The gap between the lower guide plate 5 and the upper guide plate 6 is used to receive the carton 9 conveyed to the position and cooperate to pre-wrap the cut outer packaging paper 8 onto the carton 9. The first positioning suction plate 4 is provided with a through-passing channel for the carton 9 to pass through at the gap between the lower guide plate 5 and the upper guide plate 6. The position sensor 7 is used to determine the top height of the outer packaging paper 8 conveyed to the position, and thus determine the sealing position of the outer packaging paper 8 on the large or small surface of the carton 9.

[0041] In this invention, the installation height of the lower guide plate 5 is adjusted by adjusting the installation height of the fixing plate 1 on the frame, and the vertical distance between the upper guide plate 6 and the lower guide plate 5 is adjusted by adjusting the installation height of the upper guide plate 6 on the first positioning suction plate 4. This facilitates the conveying of carton 9 of different heights to the gap between the lower guide plate 5 and the upper guide plate 6, thereby making it easier to wrap the outer packaging paper 8 of carton 9 of different heights. The top height of the conveyed outer packaging paper 8 is adjusted by adjusting the installation height of the position sensor 7 on the upper guide plate 6, thereby adjusting the sealing position of the outer packaging paper 8 on the large or small surface of the carton 9. Therefore, it is convenient to switch the sealing position of the outer packaging paper 8 on the large or small surface of the carton 9, which can meet the diverse needs of users for the sealing position of the outer packaging paper 8 of the carton 9.

[0042] In one embodiment, such as Figure 2-6 As shown, upstream of the outer packaging paper cutting and positioning mechanism along the packaging process, there are also a small package conveying and grouping mechanism, a carton label paper 10 conveying mechanism, a carton label paper 10 wrapping and folding channel, and a first rotary conveying mechanism. The small package conveying and grouping mechanism is used to arrange the small packages 26 in groups of ten during the conveying process and convey the grouped small packages into the carton label paper 10 wrapping and folding channel. The carton label paper 10 conveying mechanism is used to convey the label paper 10 from top to bottom and to the position of the carton label paper 10 wrapping and folding channel. The label paper 10 wrapping and folding channel is used to wrap the delivered label paper 10 onto the outside of the grouped small packages and apply glue to form a strip box 9 with the label paper 10 wrapped. The first rotary conveying mechanism includes a first rotary roller arranged horizontally in the front-back direction. Multiple first slots are evenly distributed circumferentially on the roller surface of the first rotary roller for holding the strip box 9 with the label paper 10 wrapped. The first rotary roller rotates intermittently 180° clockwise and is used to flip the strip box 9 in the first slots 180° and convey it to the gap between the lower guide plate 5 and the upper guide plate 6. The small package conveying grouping mechanism, the strip box label paper 10 conveying mechanism, and the strip box label paper 10 wrapping and folding channel are all conventional technologies in the prior art and will not be described in detail here. Figure 2-6 In the diagram, the small package conveying grouping mechanism is located at position C; the carton label paper 10 conveying mechanism is located at position D; the carton label paper 10 wrapping and folding channel is located at position E; the first rotary conveying mechanism is located at position F; the outer packaging paper cutting and positioning mechanism is located at position G; the second rotary conveying mechanism is located at position H; the carton outer packaging paper folding channel is located at position I; and the carton product output channel is located at position J. Figure 1 In the diagram, A represents the small side of the carton 9 corresponding to the label paper 10 wrapped around the outside of the group of small packages, and B represents the large side of the carton 9 corresponding to the label paper 10 wrapped around the outside of the group of small packages.

[0043] In one embodiment, such as Figure 11As shown, both the conveying roller 2 and the cutting roller 3 are horizontally arranged in the front-to-back direction, with the cutting roller 3 directly above the conveying roller 2. A driven roller 11 parallel to the conveying roller 2 is located on the right side of the conveying roller 2. The conveying roller 2 and the driven roller 11 are driven by gears and rotate in opposite directions. Both the conveying roller 2 and the driven roller 11 are suction rollers, creating negative pressure on their surfaces through suction. Above the gap between the conveying roller 2 and the driven roller 11, two second positioning suction plates 12 are vertically arranged in the front-to-back direction and fixedly connected to the fixing plate 1. A cutting blade 13 is provided on the surface of the cutting roller 3. The top of the second positioning suction plate 12 on the left is lower than the axis height of the cutting roller 3, and the right side of the second positioning suction plate 12 on the left is flush with the right side of the first positioning suction plate 4. The lower guide plate 5 and the upper guide plate 6 are both horizontally arranged in the front-to-back direction, with gaps between the left ends of the lower guide plate 5 and the upper guide plate 6 and the right side of the first positioning suction plate 4. 11 rotates in the opposite direction, and negative pressure is formed on the roller surfaces of both the conveying roller 2 and the driven roller 11. The conveying roller 2 and the driven roller 11 cooperate to allow the outer packaging paper 8 to pass through the gap between the conveying roller 2 and the driven roller 11 and be conveyed upward along the gap between the two second positioning suction plates 12. The outer packaging paper 8 is also conveyed upward along the right side of the first positioning suction plate 4 to the left side of the lower guide plate 5 and the upper guide plate 6. The cutting blade 13 rotates with the cutting roller 3 to the left side above the second positioning suction plate 12 and is used to cut the upwardly conveyed outer packaging paper 8. Negative pressure is formed at the gap between the two second positioning suction plates 12 by suction, and negative pressure is formed at the right side of the first positioning suction plate 4 by suction. In this way, the outer packaging paper 8 will not detach from the second positioning suction plate 12 when it is conveyed upward to the gap between the two second positioning suction plates 12, and the outer packaging paper 8 will not detach from the first positioning suction plate 4 when it is conveyed upward to the right side of the first positioning suction plate 4.

[0044] In one embodiment, such as Figure 8-11 As shown, guide blocks 14 are symmetrically arranged at the front and rear of the gap between the lower guide plate 5 and the upper guide plate 6 on the first positioning suction plate 4. Each guide block 14 has a slider 16 that slides into a horizontal groove 15 on the left side of the first positioning suction plate 4. The guide blocks 14 slide to the corresponding position in the gap between the lower guide plate 5 and the upper guide plate 6 and are fastened to the first positioning suction plate 4 with fasteners. The two guide blocks 14, together with the lower guide plate 5 and the upper guide plate 6, form a carton transition channel 17. The carton transition channel 17 is used to fold the cut outer packaging paper 8 to the right along the two horizontal long edges of one side of the carton 9, and to fold the outer packaging paper 8 at an angle along the two vertical short edges of the corresponding side of the carton 9. By adjusting the horizontal distance between the two guide blocks 14, the front and rear length of the carton transition channel 17 can be adjusted, thus facilitating the wrapping of outer packaging paper 8 with cartons of different lengths. Furthermore, the two guide blocks 14 facilitate the folding of the outer packaging paper 8 along the two vertical short edges of the corresponding side of the carton 9.

[0045] In one embodiment, the second rotary conveying mechanism includes a second rotary roller parallel to the first rotary roller. Multiple second slots are evenly distributed circumferentially on the surface of the second rotary roller for holding the carton 9 pre-wrapped with outer packaging paper 8. A fixed folding guide plate is provided on the outer side of each second slot on the second rotary roller. The outer packaging paper 8 is sealed on the large surface of the carton 9. During the intermittent clockwise rotation of the second rotary roller, the fixed folding guide plate is used to fold the outer packaging paper 8 along a horizontal long edge on the other side of the carton 9. Figure 2-3 The outer packaging paper 8 is sealed on the small side of the carton 9. The fixed folding guide plate is removed, and the second rotating roller rotates intermittently clockwise to flip the carton 9 in the second slot to 90°. The movable folding device below the second rotating roller is used to fold the outer packaging paper 8 along the two horizontal long edges of the other side of the carton 9. See Figure 4-6 The second rotating roller rotates and is used to flip the carton 9 in the second slot 180° and transport it into the outer packaging paper folding channel. This allows for flexible decision-making regarding whether to remove the fixed folding guide plate on the outside of the second slot, depending on the sealing condition of the outer packaging paper 8 on the large or small side of the carton 9. When the outer packaging paper 8 is sealing on the small side of the carton 9, the fixed folding guide plate needs to be removed. Furthermore, when the second rotating roller rotates intermittently clockwise and flips the carton 9 in the second slot to 90°, the movable folding device is needed to fold the outer packaging paper 8 along the two horizontal long edges of the other side of the carton 9. Therefore, this carton outer packaging paper packaging system can easily switch the sealing position of the outer packaging paper 8 on the large or small side of the carton 9.

[0046] In one embodiment, such as Figure 11As shown, a notched cutting roller 18 is arranged horizontally in the front-to-back direction between the conveying roller 2 and the cutting roller 3. The notched cutting roller 18 is located directly below the cutting roller 3. The notched cutting roller 18 and the cutting roller 3 are driven by gears and rotate in the same direction. The roller surface of the notched cutting roller 18 is provided with a U-shaped cutting blade, which is used to cut the outer packaging paper 8 conveyed upward and form a U-shaped cutting line. The cutting blade 13 is provided with a U-shaped groove at the corresponding position of the U-shaped cutting blade. The cutting blade 13 and the U-shaped cutting blade cooperate to form a U-shaped notch 801 at the upper end and a U-shaped protrusion 802 at the lower end of the cut outer packaging paper 8. When the drive source of the cutting roller 3 is activated, the cutting roller 3 rotates, driving the notch cutting roller 18 to rotate via gear transmission. The notch cutting roller 18 rotates in the same direction as the cutting roller 3. When the U-shaped cutting blade on the notch cutting roller 18 rotates with the notch cutting roller 18 and reaches a position close to the outer packaging paper 8, the U-shaped cutting blade cuts the upwardly conveyed outer packaging paper 8 and forms a U-shaped cutting line. At the same time, when the cutting blade 13 on the cutting roller 3 rotates with the cutting roller 3 and reaches a position close to the outer packaging paper 8, the outer packaging paper... The U-shaped cutting line on the paper 8 moves upward to a position close to the cutting roller 3. The cutting blade 13 cuts the upwardly conveyed outer packaging paper 8, and the U-shaped groove on the cutting blade 13 is used to avoid the outer packaging paper 8 at the U-shaped cutting line. After being cut by the cutting blade 13, a U-shaped protrusion 802 is formed at the lower end of the outer packaging paper 8, and a U-shaped notch 801 is formed at the upper end of the next outer packaging paper 8. Therefore, each cut outer packaging paper 8 has a U-shaped notch 801 at the upper end and a U-shaped protrusion 802 at the lower end. Figure 7 After the outer packaging paper 8 is wrapped around the outside of the carton 9, when the user needs to tear off the outer packaging paper 8 of the carton 9, they can easily tear off the outer packaging paper 8 by simply pulling the U-shaped protrusion 802.

[0047] In one embodiment, such as Figure 8 As shown, the fixing plate 1 is vertically arranged in the left-right direction. The fixing plate 1 has multiple vertical first elongated holes 19. The fixing plate 1 is fixedly connected to the frame by first fastening bolts 20 passing through the first elongated holes 19. The installation height of the fixing plate 1 on the frame is adjusted by adjusting the position of the first fastening bolts 20 within the first elongated holes 19. The first positioning suction plate 4 has multiple vertical second elongated holes 21. The upper guide plate 6 is fixedly connected to the first positioning suction plate 4 by second fastening bolts 22 passing through the second elongated holes 21. The installation height of the upper guide plate 6 on the first positioning suction plate 4 is adjusted by adjusting the position of the second fastening bolts 22 within the second elongated holes 21. Two position sensors 7 are symmetrically arranged at the front and rear of the top surface of the upper guide plate 6. Multiple shims 23 are provided between the position sensors 7 and the top surface of the upper guide plate 6. The installation height of the position sensors 7 on the upper guide plate 6 is adjusted by adjusting the number of shims 23. Figure 9Two position sensors 7 work together to detect the outer packaging paper 8 being conveyed upwards and send a signal to the drive source of the cutting roller 3. After receiving the signal, the drive source of the cutting roller 3 starts and drives the cutting roller 3 to rotate. When the cutting blade 13 on the cutting roller 3 rotates to a position close to the outer packaging paper 8, it cuts the outer packaging paper 8. Therefore, by adjusting the installation height of the position sensor 7 on the upper guide plate 6, the top height of the conveyed outer packaging paper 8 can be adjusted, thereby adjusting the sealing position of the outer packaging paper 8 on the large or small surface of the carton 9. When the outer packaging paper 8 is sealed on the large surface of the carton 9, the top height of the outer packaging paper 8 is lower. When the outer packaging paper 8 is sealed on the small surface of the carton 9, the top height of the outer packaging paper 8 is higher. At the same time, for cartons 9 of the same size, the length of the cut outer packaging paper 8 is the same.

[0048] In one embodiment, such as Figure 8 As shown, the cutting roller 3 is driven by a first servo motor 24, and the conveying roller 2 is driven by a second servo motor 25. Both the first servo motor 24 and the second servo motor 25 are mounted on the fixed plate 1. Since the cutting roller 3 and the conveying roller 2 are driven by independent drive sources, the length of the cut outer packaging paper 8 can be adjusted by adjusting the speed of the first servo motor 24 and the second servo motor 25 to accommodate different sizes of carton 9.

[0049] A packaging method for sealing the edges of a carton's outer packaging paper on the large surface of the carton, using the aforementioned carton outer packaging paper packaging system, includes the following steps:

[0050] S1, such as Figure 2-3 As shown, the label paper 10 conveying mechanism conveys the label paper 10 from top to bottom and to the label paper 10 wrapping and folding channel. At the same time, the small package conveying and grouping mechanism arranges the small packages 26 in groups of ten during the conveying process and conveys the group of small packages to the label paper 10 wrapping and folding channel. The label paper 10 wrapping and folding channel wraps the label paper 10 that has been conveyed to the position to the outside of the group of small packages and applies glue to form a label paper 9 wrapped with label paper 10. The label paper 9 wrapped with label paper 10 is pushed into the corresponding first slot of the first rotating roller. The first rotating roller rotates 180° clockwise intermittently and flips the label paper 9 in the first slot 180° and conveys it into the label paper transition channel 17. The intermittent rotation of the first rotating roller can extend the glue drying time of the label paper 10 in the label paper 9.

[0051] S2, such as Figure 8 and 10As shown, the mounting height of the fixing plate 1 on the frame is adjusted by pre-adjusting the position of the first fastening bolt 20 in the first elongated hole 19, thereby pre-adjusting the mounting height of the lower guide plate 5. The mounting height of the upper guide plate 6 on the first positioning suction plate 4 is adjusted by pre-adjusting the position of the second fastening bolt 22 in the second elongated hole 21, thereby pre-adjusting the vertical distance between the upper guide plate 6 and the lower guide plate 5. The mounting height of the position sensor 7 on the upper guide plate 6 is adjusted by pre-adjusting the number of shims 23, thereby pre-setting the top height of the outer packaging paper 8 that is conveyed to the position. The horizontal distance between the front and rear guide blocks 14 is also pre-adjusted to pre-adjust the height of the strip box transition channel 17. The front and rear length is measured, and the second servo motor 25 is started. The second servo motor 25 drives the conveyor roller 2 to rotate. The conveyor roller 2 drives the driven roller 11 to rotate through gear transmission. The conveyor roller 2 and the driven roller 11 rotate in opposite directions, and the roller surfaces of the conveyor roller 2 and the driven roller 11 are both negatively pressured by suction. The conveyor roller 2 and the driven roller 11 cooperate to make the outer packaging paper 8 pass through the gap between the conveyor roller 2 and the driven roller 11 and be conveyed upward along the gap between the two second positioning suction plates 12. The outer packaging paper 8 is also conveyed upward along the right side of the first positioning suction plate 4 to the left side of the lower guide plate 5 and the upper guide plate 6. The position sensor 7 detects the outer packaging paper 8 that has been conveyed upward and sends a signal to the first servo motor 24. The servo motor 24 starts and drives the cutting roller 3 to rotate. The cutting roller 3 drives the notch cutting roller 18 to rotate via gear transmission. The notch cutting roller 18 rotates in the same direction as the cutting roller 3. When the U-shaped cutting blade on the notch cutting roller 18 rotates with the notch cutting roller 18 to a position close to the outer packaging paper 8, the U-shaped cutting blade cuts the upwardly conveyed outer packaging paper 8 and forms a U-shaped cutting line. At the same time, when the cutting blade 13 on the cutting roller 3 rotates with the cutting roller 3 to a position close to the outer packaging paper 8, the U-shaped cutting line on the outer packaging paper 8 moves upward to a position close to the cutting roller 3. The cutting blade 13 cuts the upwardly conveyed outer packaging paper 8, and the U-shaped groove on the cutting blade 13 is used to avoid... At the U-shaped cutting line, the outer packaging paper 8, after being cut by the cutting blade 13, forms a U-shaped protrusion 802 at its lower end. Simultaneously, the upper end of the next sheet of outer packaging paper 8 forms a U-shaped notch 801. The carton transition channel 17 folds the cut outer packaging paper 8 to the right along the two horizontal long edges of the carton 9 that has been conveyed to the position, and folds the outer packaging paper 8 at the corners along the two vertical short edges of the corresponding side of the carton 9, completing the pre-wrapping of the outer packaging paper 8 of the carton 9. The carton 9 is then pushed into the corresponding second slot of the second rotating roller, with one long edge of the outer packaging paper 8 on the large surface of the carton 9. Specifically, at this time, one long edge of the outer packaging paper 8 is on the top surface of the carton 9. Figure 2-3 ;

[0052] S3. The second rotating roller rotates intermittently clockwise, and during the rotation, the fixed folding guide folds the outer packaging paper 8 along one of the horizontal long edges of the other side of the carton 9. When the second rotating roller rotates to 180°, it flips the carton 9 in the second slot 180° and transports it into the outer packaging paper folding channel. The fixed guide block in the outer packaging paper folding channel folds the outer packaging paper 8 along the last horizontal long edge of the other side of the carton 9, and folds the outer packaging paper 8 at the corners along the two vertical short edges of the other side of the carton 9, so that the two long edges of the outer packaging paper 8 overlap on the large surface of the carton 9. Specifically, at this time, the two long edges of the outer packaging paper 8 overlap on the bottom surface of the carton 9. See Figure 2-3 During the conveying process, the fixed folder in the outer packaging paper folding channel of the carton 9 folds the outer packaging paper 8 along the four horizontal short edges of the carton 9, and performs heat sealing and wrinkle removal on the main surface and the front and back sides of the carton 9. Finally, the carton product 27 is output upward through the carton product output channel.

[0053] A packaging method for sealing the edges of a carton's outer packaging paper on a small surface of the carton, using the aforementioned carton outer packaging paper packaging system, includes the following steps:

[0054] (1) such as Figure 4-6 As shown, the label paper 10 conveying mechanism conveys the label paper 10 from top to bottom and to the label paper 10 wrapping and folding channel position. At the same time, the small package conveying and grouping mechanism arranges the small packages 26 in groups of ten during the conveying process and conveys the grouped small packages to the label paper 10 wrapping and folding channel. The label paper 10 wrapping and folding channel wraps the label paper 10 that has been conveyed to the position to the outside of the grouped small packages and applies glue to form a label paper 9 wrapped with label paper 10. The label paper 9 wrapped with label paper 10 is pushed into the corresponding first slot of the first rotating roller. The first rotating roller rotates 180° clockwise intermittently and flips the label paper 9 in the first slot 180° and conveys it into the label paper transition channel 17.

[0055] (2) such as Figure 8 and 10As shown, the installation height of the fixing plate 1 on the frame is adjusted by pre-adjusting the position of the first fastening bolt 20 in the first elongated hole 19, thereby pre-adjusting the installation height of the lower guide plate 5. The installation height of the upper guide plate 6 on the first positioning suction plate 4 is adjusted by pre-adjusting the position of the second fastening bolt 22 in the second elongated hole 21, thereby pre-adjusting the vertical distance between the upper guide plate 6 and the lower guide plate 5. The installation height of the position sensor 7 on the upper guide plate 6 is adjusted by pre-adjusting the number of shims 23, thereby pre-setting the top height of the outer packaging paper 8 that has been conveyed to the position. The horizontal distance between the two guide blocks 14 is pre-adjusted, thereby pre-adjusting the front and rear length of the strip box transition channel 17. The position sensor 7 detects the outer packaging paper 8 that has been conveyed upward and sends a signal to the first servo motor 24. The first servo motor 24 starts and drives the cutting roller 3 to rotate. The cutting roller 3 drives the notched cutting roller 18 to rotate through gear transmission. The notched cutting roller 18 rotates in the same direction as the cutting roller 3. The U-shaped notched cutting roller 18... When the cutting blade rotates with the notch cutting roller 18 to a position close to the outer packaging paper 8, the U-shaped cutting blade cuts the upwardly conveyed outer packaging paper 8, forming a U-shaped cutting line. Simultaneously, when the cutting blade 13 on the cutting roller 3 rotates with the cutting roller 3 to a position close to the outer packaging paper 8, the U-shaped cutting line on the outer packaging paper 8 moves upward to a position close to the cutting roller 3. The cutting blade 13 cuts the upwardly conveyed outer packaging paper 8, and the U-shaped groove on the cutting blade 13 is used to avoid the outer packaging paper 8 at the U-shaped cutting line. After being cut by the cutter 13, the lower end of the outer packaging paper 8 forms a U-shaped protrusion 802, and at the same time, the upper end of the next outer packaging paper 8 forms a U-shaped notch 801. The carton transition channel 17 folds the cut outer packaging paper 8 to the right along the two horizontal long edges of the carton 9 that has been conveyed to the position, and folds the outer packaging paper 8 along the two vertical short edges of the corresponding side of the carton 9 to complete the pre-wrapping of the outer packaging paper 8 of the carton 9. The carton 9 is then pushed into the corresponding second slot of the second rotating roller, and the fixed folding guide plate is removed in advance.

[0056] (3) When the second rotating roller rotates intermittently clockwise to 90°, it flips the carton 9 in the second slot by 90°. The movable folding device below the second rotating roller folds the outer packaging paper 8 along the two long edges of the carton 9 on the other side, so that the two long edges of the outer packaging paper 8 overlap on the small surface of the carton 9. Specifically, at this time, the two long edges of the outer packaging paper 8 overlap on the bottom surface of the carton 9. See Figure 4-6Meanwhile, the heat sealing device below the second rotating roller rises to heat and seal the small side of the carton 9. When the second rotating roller rotates to 180°, the carton 9 in the second slot is flipped 180° and conveyed to the outer packaging paper folding channel of the carton. The fixed guide block in the outer packaging paper folding channel folds the outer packaging paper 8 along the two vertical short edges on the other side of the carton 9. During the conveying process, the fixed folder in the outer packaging paper folding channel folds the outer packaging paper 8 along the four horizontal short edges of the carton 9 and heats and seals the front and back sides of the carton 9 and removes wrinkles. Finally, the carton product 27 is output through the carton product output channel.

[0057] In summary, in this invention, after the small packages are arranged in groups, they are first packaged with trademark paper 10 to form a carton 9 wrapped with trademark paper 10. Then, an outer packaging paper 8 is wrapped around the outside of the carton 9 to achieve the functions of anti-counterfeiting, moisture-proof, and dust-proof. Furthermore, the sealing position of the outer packaging paper 8 can be selected on the large or small face of the carton 9 along its length. When the initial sealing position of the outer packaging paper of this carton is that the outer packaging paper 8 is sealed on the large face of the carton 9, and it is necessary to change it to sealing the outer packaging paper 8 on the small face of the carton 9, it is only necessary to increase the number of gaskets 23 to adjust the installation height of the position sensor 7 on the upper guide plate 6, remove the fixed folding guide plate on the outside of the second rotating roller, and add a movable folding device directly below the second rotating roller. This allows the sealing position of the carton 9 to be changed from the large face to the small face. The packaging form change operation is quick and easy, and can respond to different user needs in a timely manner. Therefore, it is convenient to switch the sealing position of the outer packaging paper 8 on the large or small face of the carton 9, which can meet the diverse needs of users for the sealing position of the outer packaging paper 8 of the carton 9.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A paper packaging system for outer packaging of carton, characterized in that: The packaging includes an outer packaging paper cutting and positioning mechanism, a second rotary conveying mechanism, a carton outer packaging paper folding channel, and a carton product output channel, all arranged along the packaging process. The outer packaging paper cutting and positioning mechanism includes a frame, on which a fixed plate (1) with adjustable installation height is provided. From bottom to top, the fixed plate (1) is provided with an outer packaging paper conveying roller (2) and a cutting roller (3). Above the cutting roller (3) is a first positioning suction plate (4) fixedly connected to the fixed plate (1). The first positioning suction plate (4) is provided with a lower guide plate (5) and an upper guide plate (6) with adjustable installation height. The upper guide plate (6) is provided with an installation height adjustment mechanism. An adjustable position sensor (7) is used to detect the outer packaging paper (8) being conveyed upwards and send a signal to the drive source of the cutting roller (3). The gap between the lower guide plate (5) and the upper guide plate (6) is used to receive the conveyed carton and cooperate to pre-wrap the cut outer packaging paper (8) onto the carton (9). The first positioning suction plate (4) has a through-channel at the gap between the lower guide plate (5) and the upper guide plate (6) for the carton (9) to pass through. The position sensor (7) is used to determine the top height of the conveyed outer packaging paper (8) and thus determine the sealing position of the outer packaging paper (8) on the large or small surface of the carton (9). The conveying roller (2) and the cutting roller (3) are both arranged horizontally in the front-back direction, with the cutting roller (3) located directly above the conveying roller (2). A driven roller (11) parallel to the conveying roller (2) is provided on the right side of the conveying roller (2). The conveying roller (2) and the driven roller (11) are driven by gears and rotate in opposite directions. Both the conveying roller (2) and the driven roller (11) are suction rollers, and negative pressure is formed on the roller surface by suction. Two second positioning suction plates (12) are arranged vertically in the front-back direction and fixedly connected to the fixing plate (1) above the gap between the conveying roller (2) and the driven roller (11). A cutting blade (13) is provided on the roller surface of the cutting roller (3). The top height of the second positioning suction plate (12) on the left is lower than the axis height of the cutting roller (3), and the second positioning suction plate on the left is... The right side of the plate (12) is flush with the right side of the first positioning suction plate (4). The lower guide plate (5) and the upper guide plate (6) are arranged horizontally in the front-back direction, and the left ends of the lower guide plate (5) and the upper guide plate (6) are separated from the right side of the first positioning suction plate (4). The conveying roller (2) and the driven roller (11) rotate in opposite directions and cooperate to make the outer packaging paper (8) pass through the gap between the conveying roller (2) and the driven roller (11) and be conveyed upward along the gap between the two second positioning suction plates (12). The outer packaging paper (8) is conveyed upward along the right side of the first positioning suction plate (4) to the left side of the lower guide plate (5) and the upper guide plate (6). The cutting blade (13) rotates with the cutting roller (3) to the left side above the second positioning suction plate (12) and is used to cut the upward conveyed outer packaging paper (8).

2. The paper packaging system for outer packaging of a carton according to claim 1, characterized in that: The upstream of the outer packaging paper cutting and positioning mechanism is also provided with a small package conveying grouping mechanism, a carton trademark paper conveying mechanism, a carton trademark paper wrapping and folding channel and a first rotating conveying mechanism. The first rotating conveying mechanism includes a first rotating roller arranged horizontally in the front-back direction. Multiple first slots are evenly distributed on the roller surface of the first rotating roller in the circumferential direction for locking the carton (9) wrapped with trademark paper (10). The first rotating roller rotates clockwise intermittently and is used to flip the carton (9) in the first slot by 180° and convey it to the gap between the lower guide plate (5) and the upper guide plate (6).

3. The paper packaging system for outer packaging of a carton according to claim 1, characterized in that: The first positioning suction plate (4) is symmetrically provided with guide blocks (14) at the front and rear of the gap between the lower guide plate (5) and the upper guide plate (6). The guide blocks (14) are provided with sliders (16) that slide in cooperation with the horizontal slide groove (15) on the left side of the first positioning suction plate (4). The guide blocks (14) slide to the corresponding position of the gap between the lower guide plate (5) and the upper guide plate (6) and are fastened to the first positioning suction plate (4) by fasteners. The two guide blocks (14) cooperate with the lower guide plate (5) and the upper guide plate (6) to form a strip box transition channel (17). The strip box transition channel (17) is used to fold the cut outer packaging paper (8) to the right along the two horizontal long edges of one side of the strip box (9) and to fold the outer packaging paper (8) at the corners along the two vertical short edges of the corresponding side of the strip box (9).

4. The paper packaging system for outer packaging of a carton according to claim 3, characterized in that: The second rotary conveying mechanism includes a second rotary roller parallel to the first rotary roller. Multiple second slots are evenly distributed along the circumferential direction on the roller surface of the second rotary roller for holding the strip box (9) pre-wrapped with outer packaging paper (8). A fixed folding guide plate is provided on the outside of each second slot on the second rotary roller. The outer packaging paper (8) is sealed on the large surface of the strip box (9). During the intermittent clockwise rotation of the second rotary roller, the fixed folding guide plate is used to fold the outer packaging paper (8) along one horizontal long edge on the other side of the strip box (9). The outer packaging paper (8) is sealed on the small surface of the strip box (9). The fixed folding guide plate is removed and the second rotary roller rotates intermittently clockwise to flip the strip box (9) in the second slot to 90°. The movable folder below the second rotary roller is used to fold the outer packaging paper (8) along two horizontal long edges on the other side of the strip box (9). The second rotary roller rotates to flip the strip box (9) in the second slot by 180° and convey it into the outer packaging paper folding channel of the strip box.

5. The paper packaging system for outer packaging of a carton according to claim 1, characterized in that: A notched cutting roller (18) is provided between the conveying roller (2) and the cutting roller (3) in a horizontally arranged front-back direction. The notched cutting roller (18) is located directly below the cutting roller (3). The notched cutting roller (18) and the cutting roller (3) are driven by gears and rotate in the same direction. The roller surface of the notched cutting roller (18) is provided with a U-shaped cutting blade for cutting the outer packaging paper (8) conveyed upward and forming a U-shaped cutting line. The cutting blade (13) is provided with a U-shaped groove at the position corresponding to the U-shaped cutting blade. The cutting blade (13) and the U-shaped cutting blade cooperate to form a U-shaped notch (801) at the upper end and a U-shaped protrusion (802) at the lower end of the cut outer packaging paper (8).

6. The paper packaging system for outer packaging of a carton according to claim 1, characterized in that: The fixing plate (1) is arranged vertically in the left-right direction. The fixing plate (1) is provided with a plurality of vertical first elongated holes (19). The fixing plate (1) and the frame are fixedly connected by first fastening bolts (20) passing through the first elongated holes (19). The installation height of the fixing plate (1) on the frame can be adjusted by adjusting the position of the first fastening bolts (20) in the first elongated holes (19). The first positioning suction plate (4) is provided with a plurality of vertical second elongated holes (21). The upper guide plate (6) and the first positioning suction plate (4) are connected by second fastening bolts passing through the second elongated holes (21). (22) Fixed connection, and the installation height of the upper guide plate (6) on the first positioning suction plate (4) is adjusted by adjusting the position of the second fastening bolt (22) in the second elongated hole (21); the position sensor (7) is two and symmetrically arranged at the front and rear of the top surface of the upper guide plate (6), and multiple gaskets (23) are provided between the position sensor (7) and the top surface of the upper guide plate (6), and the installation height of the position sensor (7) on the upper guide plate (6) is adjusted by adjusting the number of the gaskets (23), and the two position sensors (7) cooperate to detect the outer packaging paper (8) conveyed upward into place.

7. The paper packaging system for outer packaging of a carton according to claim 1, characterized in that: The cutting roller (3) is driven by a first servo motor (24), and the conveying roller (2) is driven by a second servo motor (25). Both the first servo motor (24) and the second servo motor (25) are mounted on a fixed plate (1).

8. A packaging method for sealing the edges of a carton's outer packaging paper on the large surface of the carton, wherein the outer packaging paper packaging system as described in any one of claims 4-7 is used for packaging, characterized in that... Includes the following steps: S1. Pre-adjust the installation height of the fixing plate (1), the upper guide plate (6) and the position sensor (7). The position sensor (7) detects the outer packaging paper (8) that is conveyed upward and sends a signal to the drive source of the cutting roller (3). The cutting roller (3) rotates and cuts the outer packaging paper (8) through the cutting knife (13). The strip box transition channel (17) folds the cut outer packaging paper (8) to the right along the two horizontal long edges of the strip box (9) that is conveyed to the position, and folds the outer packaging paper (8) along the two vertical short edges of the corresponding side of the strip box (9) to complete the pre-wrapping of the outer packaging paper (8) of the strip box (9). The strip box (9) is pushed into the corresponding second slot of the second rotating roller. S2. The second rotating roller rotates intermittently clockwise and during the rotation, the fixed folding guide plate folds the outer packaging paper (8) along one of the horizontal long edges of the other side of the carton (9). When the second rotating roller rotates to 180°, the carton (9) in the second slot is flipped 180° and transported to the outer packaging paper folding channel of the carton. The fixed guide block in the outer packaging paper folding channel of the carton folds the outer packaging paper (8) along the last horizontal long edge of the other side of the carton (9) and folds the outer packaging paper (8) along the two vertical short edges of the other side of the carton (9) so that the two long edges of the outer packaging paper (8) overlap on the large surface of the carton (9). During the conveying process, the fixed folder in the outer packaging paper (8) folding channel of the carton (9) folds the outer packaging paper (8) along the four horizontal short edges of the carton (9) and heats and seals the large surface and the front and rear sides of the carton (9). Finally, the carton product (27) is output through the carton product output channel.

9. A packaging method for sealing the edges of a carton's outer packaging paper on a small surface of the carton, comprising using the carton outer packaging paper packaging system as described in any one of claims 4-7, characterized in that... Includes the following steps: (1) Pre-adjust the installation height of the fixed plate (1), the upper guide plate (6) and the position sensor (7). The position sensor (7) detects the outer packaging paper (8) that is conveyed upward and sends a signal to the drive source of the cutting roller (3). The cutting roller (3) rotates and cuts the outer packaging paper (8) through the cutting knife (13). The strip box transition channel (17) folds the cut outer packaging paper (8) to the right along the two horizontal long edges of the strip box (9) that is conveyed to the position, and folds the outer packaging paper (8) along the two vertical short edges of the corresponding side of the strip box (9) to complete the pre-wrapping of the outer packaging paper (8) of the strip box (9). The strip box (9) is pushed into the corresponding second slot of the second rotating roller, and the fixed folding guide plate is removed in advance. (2) When the second rotating roller rotates clockwise intermittently to 90°, the carton (9) in the second slot is flipped 90°. The movable folding device below the second rotating roller folds the outer packaging paper (8) along the two long edges of the other side of the carton (9), so that the two long edges of the outer packaging paper (8) overlap on the small surface of the carton (9), and heat seals the small surface of the carton (9). When the second rotating roller rotates to 180°, the carton (9) in the second slot is flipped 180° and conveyed to the outside of the carton. Inside the packaging paper folding channel, the fixed guide block inside the outer packaging paper folding channel of the carton folds the outer packaging paper (8) along the two vertical short edges of the other side of the carton (9). During the conveying process of the carton (9), the fixed folder inside the outer packaging paper (8) folding channel of the carton (9) folds the outer packaging paper (8) along the four horizontal short edges of the carton (9) and heats and seals the front and rear sides of the carton (9). Finally, the carton product (27) is output through the carton product output channel.

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