A full-automatic carton sealing and forming device suitable for multi-specification cartons

Abstract

This invention discloses a fully automatic carton sealing and assembly equipment suitable for various carton sizes, comprising a feeding section, a long-side sealing section, a transition section, a translation section, and a short-side sealing section arranged sequentially in a process flow. The feeding section is equipped with a lateral width adjustment mechanism and a height-adjustable pre-pressing and shaping mechanism for secondary shaping of the top cover. The long-side sealing section is equipped with a dispensing mechanism and a pressing mechanism to complete the long-side sealing. The transition section is equipped with a photoelectric sensor to temporarily store or transport cartons according to the downstream status. The translation section uses a positioning mechanism for precise positioning, and then a lateral pushing mechanism pushes the cartons to the short-side sealing section. The short-side sealing section includes a double-chain conveyor mechanism, a short-side pressing mechanism, a short-side lower cover pressing mechanism, and a short-side upper cover pressing mechanism, integrating processes such as side ear folding, lower cover flipping, and upper cover pressing to complete the short-side sealing in one operation. This invention can achieve fully automatic continuous sealing of the long and short sides of various carton sizes, with strong adaptability, high sealing accuracy, and stable operation.

Description

Technical Field

[0001] This invention relates to the field of carton sealing technology, and in particular to a fully automatic carton sealing equipment suitable for multi-specification cartons. Background Technology

[0002] Existing carton sealing equipment is mostly semi-automatic or single-function. For example, long-side sealing and short-side sealing need to be completed on different machines, relying on manual transfer or auxiliary positioning. This results in low automation, mismatched production line cycles, and a high risk of material jams or downtime. For cartons of different sizes, traditional equipment often requires manual operation of multiple adjustment points for width and height adjustment, which is time-consuming and difficult to guarantee accuracy. In particular, the top cover of the carton is prone to wrinkles, springback, or misalignment after pre-folding, leading to misalignment and weak adhesion during subsequent gluing and pressing. Furthermore, the lack of precise positioning and smooth pushing mechanisms for changing the conveying direction (from long-side conveying to short-side conveying) further affects the alignment accuracy of short-side sealing. Therefore, there is an urgent need for an integrated machine that can achieve fully automatic continuous sealing of multi-size cartons and has precise shaping and positioning functions. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a fully automatic carton sealing and forming equipment suitable for multiple specifications of cartons, so as to solve the problems of low automation and poor specification adaptability of the existing carton sealing and forming equipment.

[0004] To achieve the above and other related objectives, the present invention provides the following technical solution:

[0005] An automated carton sealing and forming equipment suitable for multi-specification cartons includes: a feeding section, a long-side sealing section, a transition section, a translation section, and a short-side sealing section arranged sequentially according to the carton sealing and forming process; the feeding section, long-side sealing section, transition section, and translation section all employ roller conveyors to achieve smooth conveying of the cartons along their length; the short-side sealing section employs a chain-type roller conveyor to achieve conveying of the cartons along their width; the feeding section includes a lateral width adjustment mechanism and a pre-pressing and shaping mechanism positioned above the roller conveyor and with adjustable height; the long-side sealing section includes a long-side glue dispensing mechanism and a pressing mechanism arranged sequentially along the conveying direction, the long-side glue dispensing mechanism being used to... The long side bottom cover of the carton is coated with hot melt adhesive. The pressing mechanism is used to press the long side top cover and the long side bottom cover together to complete the long side sealing of the carton. The translation section includes a positioning mechanism for positioning the carton to a preset position in the conveying direction, and a lateral pushing mechanism for pushing the positioned carton to the short side sealing section along its width direction. The short side sealing section includes a double chain conveying mechanism, a short side pressing mechanism located above the double chain conveying mechanism, a short side bottom cover pressing mechanism, and a short side top cover pressing mechanism. The transition section is equipped with a photoelectric sensor, which is used to collect the working status of the translation section and the short side sealing section, and temporarily store or transport the carton to the translation section according to the working status.

[0006] Furthermore, the pre-pressing and shaping mechanism includes a lifting device, a pressure plate disposed at the lower end of the lifting device, a pressure roller located on one side of the pressure plate and arranged along the length of the carton, and a pre-pressing component disposed on one side relative to the pressure roller; the pre-pressing component includes a leveling rod extending along the carton conveying direction, with a first pressing electric cylinder and a second pressing electric cylinder respectively disposed at both ends of the leveling rod, the leveling rod being inclined relative to the carton conveying direction and gradually moving towards the roller along the conveying direction to cooperate with the pressure roller to complete the folding and flattening.

[0007] Furthermore, the lateral width adjustment mechanism includes a feed roller stop arranged along the carton conveying direction, a cylinder stop arranged on one side opposite to the feed roller stop, a slide rail arranged perpendicular to the cylinder stop, a slider sliding on the slide rail and fixed at the lower end of the cylinder stop, and a width adjustment cylinder arranged at the lower end of the cylinder stop; the width adjustment cylinder can drive the cylinder stop to move along the slide rail to adjust the distance between the cylinder stop and the feed roller stop.

[0008] Furthermore, the pressing mechanism includes a pre-pressing mechanism arranged sequentially along the conveying direction above the roller conveyor, side positioning mechanisms located on both sides of the roller conveyor, and a main pressing mechanism located above the roller conveyor. The pre-pressing mechanism is used to initially press the top of the carton and eliminate the springback gap of the carton cover. The long-side dispensing mechanism is used to spray hot melt adhesive onto the overlapping area of ​​the long-side lower cover. The main pressing mechanism is used to apply constant pressure downward to the top cover of the carton. The side positioning mechanisms simultaneously abut against the carton from both sides in the width direction of the carton to fold the long-side upper cover downward and press it firmly onto the bonding surface coated with hot melt adhesive, thereby achieving automatic sealing of the long side.

[0009] Furthermore, the pre-compression mechanism includes an electric pre-compression cylinder disposed above the roller conveyor and a pre-compression rod disposed at the output end of the electric pre-compression cylinder and perpendicular to the carton conveying direction; the side positioning mechanism includes a long side roller stop disposed along the carton conveying direction, a movable stop disposed on one side of the long side roller stop, and a wedge-shaped folding guide surface disposed on one side of the roller stop; a movable nut is fixed at the lower end of the movable stop, and a screw is threadedly connected to the movable nut, and a movable stop motor for driving the screw to rotate is provided at one end of the screw; the main pressing mechanism includes a lifting device mounted above the roller conveyor, a pressing unit disposed at the lower end of the lifting device, and an auxiliary support assembly; the auxiliary support assembly includes a support frame and an auxiliary conveying wheel rotatably disposed at the lower end of the support frame.

[0010] Furthermore, the dual-chain conveyor mechanism includes a fixed chain machine and a movable chain machine arranged opposite to each other, forming a channel for conveying cartons; the short-side pressing mechanism includes a lifting device and two pressing units arranged at the lower end of the device; the short-side lower cover pressing mechanism includes a lifting frame, an ear-punching mechanism, a lower cover glue dispensing mechanism, and a lower cover flipping guide plate arranged sequentially on the lifting frame and along the carton conveying direction; the short-side upper cover pressing mechanism includes two sets of glue guns and upper cover sealing devices arranged symmetrically along the carton conveying path on the outside of the fixed chain machine and the movable chain machine; the pressing unit includes a pressing motor, a driving synchronous pulley, a driven synchronous pulley, and a belt tensioned between the driving synchronous pulley and the driven synchronous pulley, the pressing motor driving the belt and moving the carton along the conveying direction.

[0011] Furthermore, the cover sealing device includes two oppositely arranged fixed sealing units and a movable sealing unit; each of the fixed sealing unit and the movable sealing unit includes a sealing bracket, a plurality of sealing push rods disposed on the sealing bracket, and a sealing plate disposed at the lower end of the sealing push rods; the movable sealing unit also includes a guide assembly disposed perpendicular to the sealing bracket and a movable sealing assembly; the movable sealing assembly includes a sealing rack, a sealing gear meshing with the sealing rack, and a sealing motor driving the sealing gear to rotate.

[0012] Furthermore, both the fixed chain machine and the movable chain machine include a chain machine body and a plurality of push plates symmetrically arranged on the chain machine body; the movable chain machine also includes guide components and movable chain assemblies vertically arranged at both ends of the chain machine body; the movable chain assembly includes a movable chain motor arranged on the chain machine body, a movable chain gear arranged at the output end of the movable chain motor, and a movable chain rack meshing with and fixedly arranged with the movable chain gear.

[0013] Furthermore, the lifting device includes a horizontally arranged transmission shaft and two lifting components symmetrically arranged at both ends of the transmission shaft; each lifting component includes a drive shaft coaxially connected to the transmission shaft and a lifting screw meshing with the drive shaft and arranged vertically; one of the drive shafts is connected to a lifting motor, which drives the drive shaft connected to it to rotate, and the drive shaft drives the other drive shaft to rotate synchronously through the transmission shaft, and the two drive shafts respectively drive the corresponding lifting screws to lift synchronously.

[0014] Furthermore, the positioning mechanism includes a positioning motor disposed at the end of the translation section along the conveying direction, a positioning gear disposed at the output end of the positioning motor, a positioning rack perpendicular to the roller and meshing with the positioning gear, a guide assembly disposed parallel to the positioning rack, and a positioning plate disposed on the positioning rack and the guide assembly; the transverse pushing mechanism includes a transverse pushing motor, a driving pulley connected to the output end of the transverse pushing motor, a driven pulley, a synchronous belt wound between the driving pulley and the driven pulley and whose projection is parallel to the roller, a pusher plate disposed on the synchronous belt, and a plurality of push rods disposed on the pusher plate and located in the gap between adjacent rollers.

[0015] As described above, the fully automatic carton sealing equipment of the present invention, applicable to multiple specifications of cartons, has the following beneficial effects: The present invention achieves fully automatic continuous sealing of the long and short sides of cartons by sequentially arranging a feeding section, long side sealing section, transition section, translation section, and short side sealing section according to the sealing and forming process, significantly improving production efficiency. The feeding section integrates a pre-pressing and shaping mechanism with adjustable lateral width and height, which can quickly adapt to various carton specifications. It also performs secondary shaping of the top cover through a progressive folding channel using pressure rollers and inclined leveling rods, effectively eliminating wrinkles and springback, providing a stable benchmark for subsequent sealing, and improving the sealing qualification rate. In the long side sealing section, the pre-pressing mechanism, side positioning mechanism, and main pressing mechanism work together, in conjunction with auxiliary support wheels, to ensure precise alignment and uniform pressing of the long side top and bottom covers. The transition section monitors the downstream status in real time through photoelectric sensors and has a temporary buffer function, avoiding material jamming and machine stoppage, ensuring smooth operation of the production line. The translation section employs precise gear and rack positioning and synchronous belt lateral pushing, enabling accurate reversible transport of cartons from the length direction to the width direction, providing a precise positional reference for short-side sealing. The short-side sealing section forms an adjustable-width conveyor channel through a fixed and movable chain machine, integrating multiple processes such as short-side pressing, lower cover pressing, and upper cover pressing, completing the entire short-side sealing process in one go. The sealing device uses a motor-driven gear and rack adaptive adjustment, and the pressing unit uses continuous belt conveying, avoiding the impact and skewing caused by intermittent pushing. The overall structure is compact and highly automated, flexibly adapting to high-quality sealing production of cartons of various sizes. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the structure of this invention.

[0017] Figure 2 The diagram shows the structure of the feeding section.

[0018] Figure 3 The diagram shows the structure of the cylinder stop.

[0019] Figure 4 The diagram shows the structure of the long side sealing section.

[0020] Figure 5 This is another structural diagram of the long side sealing section.

[0021] Figure 6 The diagram shows the structure of the pressing unit and auxiliary support components.

[0022] Figure 7 The diagram shows the structure of the short side sealing section.

[0023] Figure 8 This is another structural diagram of the short side sealing section.

[0024] Figure 9 The diagram shows the structure of the short side lower cover pressing mechanism.

[0025] Figure 10 The diagram shows the structure of the fixed sealing unit.

[0026] Figure 11 The diagram shown is a structural schematic of the active sealing unit.

[0027] Figure 12 Displayed as Figure 8 A magnified view of a portion of point A in the middle.

[0028] Figure 13 Displayed as Figure 8 A magnified view of a section at point B.

[0029] Figure 14 The diagram shown is a structural schematic of the lifting device.

[0030] Figure 15 The diagram shows the structure of the transition section.

[0031] Figure 16 This is another structural diagram of the transition section.

[0032] Figure 17 The diagram shown is a structural schematic of the positioning mechanism.

[0033] Component designation explanation

[0034] 1. Long-side dispensing mechanism; 2. Pressure plate; 3. Pressure roller; 4. Leveling rod; 5. First pressure cylinder; 6. Second pressure cylinder; 7. Feed roller stop; 8. Cylinder stop; 9. Slide rail; 10. Slider; 11. Wide-range adjustment cylinder; 12. Electric pre-pressure cylinder; 13. Pre-pressure rod; 14. Long-side roller stop; 15. Moving stop; 16. Wedge-shaped folding guide surface; 17. Moving nut; 18. Screw; 19. Support frame; 20. Auxiliary conveyor wheel; 21. Lifting frame; 22. Ear-punching mechanism; 23. Lower cover dispensing mechanism; 24. Lower cover flipping guide plate; 25. Glue gun; 26. Pressing motor; 27. Active synchronous wheel; 28. From 29. Moving synchronous pulley; 30. Belt; 31. Fixed sealing unit; 32. Movable sealing unit; 33. Sealing bracket; 34. Sealing push rod; 35. Sealing rack; 36. Sealing gear; 37. Sealing motor; 38. Movable chain rack; 39. Drive shaft; 41. Drive shaft; 42. Lifting screw; 43. Lifting motor; 44. Positioning motor; 45. Positioning gear; 46. Positioning rack; 47. Guide assembly; 48. Positioning plate; 49. Lateral push motor; 50. Driving pulley; 51. Driven pulley; 52. Synchronous belt; 53. Push plate; 54. Push rod; 55. Chain machine body; 56. Push plate. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0036] Please see Figure 1-17 This invention provides a fully automatic carton sealing and forming equipment suitable for multi-specification cartons, comprising: a feeding section, a long-side sealing section, a transition section, a translation section, and a short-side sealing section arranged sequentially according to the carton sealing and forming process; the feeding section, long-side sealing section, transition section, and translation section all employ roller conveyors to achieve smooth conveying of the cartons along their length; the short-side sealing section employs a chain-type roller conveyor to achieve conveying of the cartons along their width; the feeding section includes a lateral width adjustment mechanism and a pre-pressing and shaping mechanism disposed above the roller conveyor and with adjustable height; the long-side sealing section includes a long-side glue dispensing mechanism 1 and a pressing mechanism arranged sequentially along the conveying direction, wherein the long-side glue dispensing mechanism... 1. A device for applying hot melt adhesive to the lower cover of the long side of a carton; the pressing mechanism is used to press the upper cover and the lower cover of the long side together to seal the long side of the carton; the translation section includes a positioning mechanism for positioning the carton to a preset position in the conveying direction, and a lateral pushing mechanism for pushing the positioned carton along its width direction to the short side sealing section; the short side sealing section includes a double chain conveying mechanism, a short side pressing mechanism located above the double chain conveying mechanism, a short side lower cover pressing mechanism, and a short side upper cover pressing mechanism; the transition section is equipped with a photoelectric sensor, which is used to collect the working status of the translation section and the short sealing section, and temporarily store or convey the carton to the translation section according to the working status.

[0037] When the equipment is working, the carton passes through the feeding section, long side sealing section, transition section, translation section and short side sealing section in sequence according to the sealing and forming process. The feeding section first adjusts the channel width according to the carton specifications using a lateral width adjustment mechanism. Simultaneously, a pre-pressing and shaping mechanism descends to a set height to perform secondary pre-pressing and shaping on the carton's top cover, eliminating wrinkles and misalignment. The carton then enters the long-side sealing section along its length. A long-side gluing mechanism 1 applies hot melt adhesive to the bottom cover of the long side of the carton, and a pressing mechanism presses the top cover of the long side against the glued bottom cover, completing the long-side sealing. The sealed carton then enters the transition section. A photoelectric sensor in the transition section monitors the working status of the translation section and the short-side sealing section in real time. When downstream is busy, the carton is temporarily stored; when idle, it continues to be conveyed to the translation section. The translation section uses a positioning mechanism to precisely position the carton at a preset location, and then a lateral pushing mechanism pushes the carton along its width to the short-side sealing section. The short-side sealing section uses a double-chain conveyor mechanism to carry the carton, which sequentially passes through a short-side pressing mechanism, a short-side bottom cover pressing mechanism, and a short-side top cover pressing mechanism to complete the entire short-side sealing process, ultimately outputting the finished carton.

[0038] This equipment, through five functional sections arranged sequentially according to the sealing and forming process, achieves fully automated and continuous sealing of the long and short sides of cartons, significantly improving production efficiency. The feeding section integrates a pre-pressing and shaping mechanism with adjustable lateral width and height, enabling rapid adaptation to various carton sizes and secondary shaping of the top cover, providing a stable reference for subsequent sealing and effectively improving the sealing qualification rate. The photoelectric sensor and temporary storage function in the transition section coordinate the conveying rhythm of the preceding and following processes, avoiding material jams and downtime, and ensuring smooth operation of the production line. The positioning and lateral pushing mechanism in the translation section achieves precise conversion of the carton conveying direction from the length direction to the width direction, providing a precise positional reference for short side sealing. The short side sealing section adopts a double-chain conveyor mechanism and integrates multiple sealing stations, completing the pressing and sealing of the short side in one go. The overall structure is compact and highly automated, suitable for flexible production of various carton sizes.

[0039] The pre-pressing and shaping mechanism includes a lifting device, a pressure plate 2 disposed at the lower end of the lifting device, a pressure roller 3 located on one side of the pressure plate 2 and arranged along the length of the carton, and a pre-pressing component disposed on one side of the pressure roller 3; the pre-pressing component includes a leveling rod 4 extending along the carton conveying direction, with a first pressing electric cylinder 5 and a second pressing electric cylinder 6 respectively disposed at both ends of the leveling rod 4, the leveling rod 4 being inclined relative to the carton conveying direction and gradually moving towards the roller along the conveying direction to cooperate with the pressure roller 3 to complete the folding and flattening.

[0040] In the feeding section, when the pre-pressing and shaping mechanism is working, the lifting device first drives the pressure plate 2 to descend to a preset height according to the carton specifications. The pressure plate 2 performs preliminary pre-pressing and shaping on the top cover of the carton. The pressure roller 3 located on one side of the pressure plate 2 is arranged along the length of the carton, providing continuous rolling pressure on the top cover of the carton. At the same time, the pre-pressing components set on the opposite side of the pressure roller 3 begin to operate: the first and second pressure cylinders at both ends of the leveling rod 4 synchronously drive the leveling rod 4 to descend. Since the leveling rod 4 is inclined relative to the carton conveying direction and gradually moves towards the roller surface along the conveying direction, a gradually narrowing folding channel is formed between the leveling rod 4 and the pressure roller 3. When the carton moves forward under the drive of the roller conveyor, the top cover first contacts the pressure roller 3, and then is gradually guided by the inclined leveling rod 4 and pressed down flat. Finally, together with the pressure roller 3, it completes the continuous and progressive folding and flattening action from start to finish, eliminating wrinkles and warping of the top cover.

[0041] This pre-compression and shaping mechanism features a height-adjustable pressure plate 2 driven by a lifting device, allowing for rapid adaptation to different carton heights and enhancing the equipment's flexible production capabilities. The pressure roller 3, in conjunction with the inclined leveling rod 4, forms a progressively narrowing folding channel, ensuring the carton lid is gradually flattened during transport rather than subjected to sudden impact. This prevents wrinkles, cracks, or misalignment caused by sudden bending, significantly improving the smoothness and consistency of the pre-compression and shaping process. The leveling rod 4 is driven at both ends by independent first and second pressure cylinders 5 and 6, respectively, allowing precise control of its lifting stroke and tilt angle, further enhancing the mechanism's adaptability to cartons of varying widths. This structure completes high-quality lid pre-compression and shaping at the feeding stage, providing a flat and stable reference surface for subsequent long-side sealing, thus improving the sealing qualification rate from the outset.

[0042] The lateral width adjustment mechanism includes a feed roller stop 7 arranged along the carton conveying direction, a cylinder stop 8 arranged on one side opposite to the feed roller stop 7, a slide rail 9 arranged perpendicular to the cylinder stop 8, a slider 10 sliding on the slide rail 9 and fixed at the lower end of the cylinder stop 8, and a width adjustment cylinder 11 arranged at the lower end of the cylinder stop 8; the width adjustment cylinder 11 can drive the cylinder stop 8 to move along the slide rail 9 to adjust the distance between the cylinder stop 8 and the feed roller stop 7.

[0043] In the feeding section, when the lateral width adjustment mechanism is working, the width adjustment cylinder 11 serves as the power source. Its piston rod extends or retracts, pushing the cylinder stop 8 to move. A slider 10 is fixed to the lower end of the cylinder stop 8, which slides on a slide rail 9 perpendicular to the cylinder stop 8, providing precise guidance for its movement. The feed roller stop 7 is fixedly located on the other side of the conveying channel, opposite to the cylinder stop 8. When the width adjustment cylinder 11 drives the cylinder stop 8 to move horizontally along the slide rail 9, the distance between the cylinder stop 8 and the stationary feed roller stop 7 changes accordingly, thereby adjusting the width of the carton conveying channel to accommodate cartons of different widths. After adjustment, the cylinder stop 8 remains in position, and the cartons are smoothly conveyed along the length between the two stops.

[0044] This lateral width adjustment mechanism uses a width-adjusting cylinder 11 to drive the cylinder stop 8 on the moving side. Combined with the guidance of the slide rail 9 and slider 10, it achieves rapid and precise adjustment of the channel width, efficiently adapting to various carton sizes and significantly improving the equipment's flexible production capabilities. The single-sided adjustment method, with the feed roller stop 7 fixed and the cylinder stop 8 moving, is simple in structure and easy to control, reducing manufacturing costs and control complexity. The guiding design of the slide rail 9 and slider 10 ensures the straightness and stability of the cylinder stop 8 during movement, preventing carton jamming or deviation due to skew. The entire mechanism is integrated into the feeding section, completing width alignment before the carton enters the conveyor channel. This provides a precise lateral positioning reference for subsequent pre-pressing and shaping, as well as long-side sealing, effectively improving the consistency of sealing quality.

[0045] The pressing mechanism includes a pre-pressing mechanism arranged sequentially along the conveying direction above the roller conveyor, a side positioning mechanism located on both sides of the roller conveyor, and a main pressing mechanism located above the roller conveyor. The pre-pressing mechanism is used to initially press the top of the carton and eliminate the springback gap of the carton cover. The long-side dispensing mechanism 1 is used to spray hot melt adhesive onto the overlapping part of the long-side lower cover. The main pressing mechanism is used to apply constant pressure downward to the top cover of the carton. The side positioning mechanism simultaneously abuts against the carton from both sides in the width direction of the carton to fold the long-side upper cover downward and press it firmly onto the bonding surface coated with hot melt adhesive, thereby achieving automatic sealing of the long side.

[0046] In the long-side sealing section, after the carton is fed in along its length by the roller conveyor, it first passes through the pre-pressing mechanism: the pre-pressing mechanism initially presses the top of the carton to eliminate gaps caused by material rebound, ensuring the top cover and carton body are in a close fit. Then, the long-side gluing mechanism 1 sprays hot melt adhesive onto the overlapping area of ​​the bottom cover along the long side of the carton, completing the gluing process. The carton continues forward into the main pressing area, where the side positioning mechanism simultaneously abuts against the carton from both sides along its width, folding the top cover downwards and guiding it to the overlapping position with the glued bottom cover. Simultaneously, the main pressing mechanism applies constant downward pressure to the top cover, pressing the top and bottom covers firmly onto the hot melt adhesive bonding surface, ensuring a strong bond and completing the automated sealing of the long side. Pre-pressing, gluing, side positioning, and main pressing are arranged sequentially along the conveying direction, forming a continuous, automated assembly line operation without manual intervention, significantly improving the efficiency and consistency of long-side sealing. This structure is particularly suitable for multi-size cartons. Through the height adjustment of the pre-compression mechanism and the width self-adaptation of the side positioning mechanism, it can quickly adapt to cartons of different sizes, enhancing the versatility of the equipment.

[0047] The pre-compression mechanism includes an electric pre-compression cylinder 12 mounted above the roller conveyor and a pre-compression rod 13 mounted at the output end of the electric pre-compression cylinder 12 and perpendicular to the carton conveying direction; the side positioning mechanism includes a long side roller stop 14 mounted along the carton conveying direction, a movable stop 15 mounted on one side of the long side roller stop 14, and a wedge-shaped folding guide surface 16 mounted on one side of the roller stop; a movable nut 17 is fixed at the lower end of the movable stop 15, and a screw 18 is threadedly connected to the movable nut 17, and a motor for driving the screw 18 to rotate is provided at one end of the screw 18; the main pressing mechanism includes a lifting device mounted above the roller conveyor, a pressing unit mounted at the lower end of the lifting device, and an auxiliary support assembly; the auxiliary support assembly includes a support frame 19 and an auxiliary conveying wheel 20 rotatably mounted at the lower end of the support frame 19.

[0048] In the long-side sealing section, the moving stop 15 is driven by a motor to rotate the screw 18, which in turn moves the moving stop 15 towards the long-side roller stop 14 via the moving nut 17. Together with the fixed long-side roller stop 14, the moving stop 15 abuts against the carton from both sides. At the same time, the wedge-shaped folding guide surface 16 on one side of the roller stop guides the long-side top cover downwards and folds it over. The lifting device of the main pressing mechanism drives the pressing unit to descend, applying constant pressure to the top cover of the carton, pressing and bonding the long-side top cover with the glued long-side bottom cover. The support frame 19 of the auxiliary support assembly has an auxiliary conveying wheel 20 at its lower end, which rotates synchronously with the movement of the carton during the pressing process, providing stable support for the bottom of the carton and ensuring that the pressing force is evenly transmitted to complete the long-side sealing.

[0049] The pressing mechanism effectively eliminates gaps caused by material rebound in the upper cover through the active pressing of the electric pre-pressing cylinder 12 and pre-pressing rod 13, avoiding incomplete adhesion or misalignment during pressing after gluing, thus improving sealing reliability. The side positioning mechanism adopts a transmission method of motor-driven screw 18 nut for the moving stop 15, realizing precise position control of the moving stop 15. Combined with the wedge-shaped folding guide surface 16, it can smoothly and accurately fold the upper cover to the gluing position, adapting to carton specifications of different widths. The lifting device of the main pressing mechanism can adjust the downward stroke and pressure of the pressing unit according to the height of the carton. With the auxiliary conveying wheel 20 of the auxiliary support component, it provides rolling support for the bottom of the carton during the pressing process, which not only prevents the carton from deforming due to local pressure, but also ensures that the pressing force is evenly distributed along the long side, improving the flatness and adhesion strength of the seal. The overall structure realizes the coordinated work of pre-pressing, folding guidance, constant pressing and auxiliary support, significantly improving the automation level of long side sealing and the quality of finished products.

[0050] The dual-chain conveyor mechanism includes a fixed chain machine and a movable chain machine arranged opposite each other, forming a channel for conveying cartons; the short-side pressing mechanism includes a lifting device and two pressing units arranged at the lower end of the device; the short-side lower cover pressing mechanism includes a lifting frame 21, an ear-punching mechanism 22 arranged on the lifting frame 21 and sequentially arranged along the carton conveying direction, a lower cover glue dispensing mechanism 23, and a lower cover flipping guide plate 24; the short-side upper cover pressing mechanism includes two sets of glue guns 25 and upper cover sealing devices arranged symmetrically along the carton conveying path on the outside of the fixed chain machine and the movable chain machine; the pressing unit includes a pressing motor 26, a driving synchronous pulley 27, a driven synchronous pulley 28, and a belt 29 tensioned between the driving synchronous pulley 27 and the driven synchronous pulley 28, the pressing motor 26 drives the belt 29 and moves the carton along the conveying direction.

[0051] After the carton is pushed into the short-side sealing section along the width direction from the translation section, it is first received by the double-chain conveyor mechanism: a conveying channel is formed between the fixed chain machine and the movable chain machine, which are set opposite each other. The push plate 56 on the chain machine pushes the carton forward along the width direction. The carton first passes through the short-side pressing mechanism. The lifting device drives two pressing units to descend and press the carton down from above to prevent displacement during the subsequent sealing process. Then the carton enters the short-side lower cover pressing mechanism area: the lifting frame 21 adjusts its position according to the height of the carton through the lifting device, the ear-punching mechanism 22 first folds the side ears inward, the lower cover glue dispensing mechanism 23 applies hot melt glue to the short-side lower cover, and the lower cover flipping guide plate 24 flips the lower cover upward to the position to be glued. Then the carton enters the short-side upper cover pressing mechanism area: two sets of glue guns 25, which are symmetrically set on the outside of the fixed chain machine and the movable chain machine, apply glue to the outside of the short-side lower cover respectively, and the upper cover sealing device presses the upper cover down and presses it firmly and glued to the glued lower cover. Throughout the sealing process, the pressing unit located in the pressing mechanism or related workstation drives the active synchronous wheel 27, the driven synchronous wheel 28 and the belt 29 to rotate via the pressing motor 26. The belt 29 contacts the carton and drives the carton to move stably along the conveying direction, ensuring a smooth transition of the carton between each workstation.

[0052] The short-side sealing section, with its fixed and movable chain conveyors positioned opposite each other, forms an adjustable-width conveyor channel, enabling rapid adaptation to cartons of different widths and enhancing the equipment's flexible production capabilities. The short-side pressing mechanism presses down on the carton from above before sealing, effectively suppressing any jumping or shifting during side ear folding, gluing, and flap opening, creating stable conditions for subsequent precise sealing. The short-side lower flap pressing mechanism integrates three stations: ear punching, gluing, and upward guide plate. It sequentially completes side ear folding, lower flap gluing, and upper flap folding along the conveying direction, featuring a compact structure and continuous operation, achieving integrated automatic lower flap sealing. The short-side upper flap pressing mechanism is symmetrically positioned on both sides. Through the coordinated work of the outer glue gun 25 and the upper flap sealing device, it simultaneously completes gluing and pressing of the lower flaps on both sides, ensuring the symmetry and consistency of the sealing on both sides of the short side. The pressing unit adopts a belt 29 driven by a motor. The belt 29 contacts the surface of the carton and actively drives the carton to move. Compared with the intermittent pushing method of the traditional chain pusher 56, it realizes the continuous and stable conveying of the carton between each sealing station, avoids the displacement of the carton or the skew of the sealing caused by the impact of the pusher 56, and significantly improves the accuracy of short side sealing and the yield.

[0053] The upper cover sealing device includes two fixed sealing units 30 and a movable sealing unit 31 arranged opposite to each other; each of the fixed sealing unit 30 and the movable sealing unit 31 includes a sealing bracket 32, a plurality of sealing push rods 33 arranged on the sealing bracket 32, and a sealing plate 34 arranged at the lower end of the sealing push rods 33; the movable sealing unit 31 also includes a guide component 47 arranged perpendicular to the sealing bracket 32 ​​and a movable sealing component; the movable sealing component includes a sealing rack 35, a sealing gear 36 meshing with the sealing rack 35, and a sealing motor 37 driving the sealing gear 36 to rotate.

[0054] At the short-side top cover sealing station, after the carton is conveyed to the designated position by the chain conveyor mechanism, the top cover sealing device begins to operate. The fixed sealing unit 30 remains in a fixed position, while the movable sealing unit 31 adaptively adjusts according to the carton width: the sealing motor 37 drives the sealing gear 36 to rotate, and the sealing rack 35, meshing with the sealing gear 36, moves the movable sealing unit 31 horizontally along the guide assembly 47, matching the distance between the two opposing fixed sealing units 30 and the movable sealing unit 31 to the carton width. After adjustment, the sealing brackets 32 on the fixed sealing unit 30 and the movable sealing unit 31 drive the sealing push rod 33 to extend downwards, causing the sealing plate 34 to press against the short-side top cover, firmly bonding the top cover to the already glued bottom cover, thus completing the sealing of the short-side top cover.

[0055] The lid sealing device, with a fixed sealing unit 30 and a movable sealing unit 31 arranged opposite each other and combined with a sealing motor 37, a gear and rack assembly, and a guide assembly 47, achieves rapid and precise adjustment of the sealing width, adapting to different carton widths and significantly improving the equipment's versatility and flexible production capabilities. The movable sealing unit 31 uses a gear and rack transmission system, working with the guide assembly 47 to ensure smooth movement and positional accuracy, preventing loose sealing or carton damage due to misalignment. The fixed and movable units each have independently installed sealing push rods 33 and sealing plates 34, which can apply pressure evenly according to the width distribution of the carton lid, ensuring consistent force on the sealing surface and improving the strength and sealing of the hot melt adhesive.

[0056] Both the fixed chain machine and the movable chain machine include a chain machine body 55 and a plurality of push plates 56 symmetrically arranged on the chain machine body 55; the movable chain machine also includes guide components 47 vertically arranged at both ends of the chain machine body 55 and movable chain components; the movable chain component includes a movable chain motor arranged on the chain machine body 55, a movable chain gear arranged at the output end of the movable chain motor, and a movable chain rack 38 meshing with and fixedly arranged with the movable chain gear.

[0057] In the short-side sealing section, when the double-chain conveyor mechanism is working, the fixed chain conveyor remains in a fixed position, while the movable chain conveyor adjusts its position according to the width of the carton. The movable chain motor starts, and its output movable chain gear rotates. Since the movable chain gear meshes with the fixed movable chain rack 38, and the rack remains stationary, the reaction force generated by the gear rotation drives the movable chain conveyor body 55 to move horizontally along the guide components 47 vertically arranged at both ends of the chain conveyor body 55. This changes the channel width between the movable and fixed chain conveyors to accommodate cartons of different sizes. After adjustment, the chain conveyor bodies 55 on both the fixed and movable chain conveyors drive multiple symmetrically arranged push plates 56 in a cyclical motion. The push plates 56 push the carton sequentially through each station of the short-side sealing section along its width, completing the sealing process.

[0058] This dual-chain conveyor mechanism, through the meshing transmission of a motor, gears, and fixed rack on the movable chain conveyor, combined with the guidance of the guide assembly 47, achieves electric and precise adjustment of the channel width. It can quickly adapt to cartons of various widths, significantly improving the equipment's flexible production capacity and automation level. Multiple push plates 56 symmetrically arranged on the chain conveyor body 55 can evenly and stably push the cartons, ensuring a smooth transition between sealing stations. This simple and compact structure is easy to control and works in conjunction with other mechanisms in the short-side sealing section, providing a reliable conveying foundation for efficient and stable short-side sealing.

[0059] The lifting device includes a horizontally arranged transmission shaft 39 and two lifting components symmetrically arranged at both ends of the transmission shaft 39. Each lifting component includes a drive shaft 41 coaxially connected to the transmission shaft 39 and a lifting screw 42 meshing with the drive shaft 41 and arranged vertically. One of the drive shafts 41 is connected to a lifting motor 43, which drives the drive shaft 41 connected to it to rotate. The drive shaft 41 drives the other drive shaft 41 to rotate synchronously through the transmission shaft 39. The two drive shafts 41 respectively drive the corresponding lifting screws 42 to lift synchronously.

[0060] When the lifting device is in operation, the lifting motor 43 starts and drives the drive shaft 41 connected to it to rotate. The drive shaft 41 transmits rotational power synchronously to the drive shaft 41 at the other end through the transmission shaft 39 arranged horizontally, realizing the synchronous rotation of the two drive shafts 41. Each drive shaft 41 meshes with a lifting screw 42 arranged vertically (e.g., through a worm gear). The forward and reverse rotation of the drive shaft 41 drives the lifting screw 42 to rise or fall vertically. The lower ends of the two lifting screws 42 are connected to the driven component (such as the pressure plate 2, the pressing unit, or the lifting frame 21). Since the two drive shafts 41 are mechanically synchronized through the transmission shaft 39, the two lifting screws 42 always maintain synchronous lifting, thereby driving the driven component to move smoothly up and down and precisely controlling its lifting height.

[0061] This lifting device achieves mechanical synchronization of the two drive shafts 41 through a single lifting motor 43 and a transmission shaft 39. Compared with using two independent motors or an electrical synchronization scheme, this method is simpler in structure, lower in cost, and offers higher synchronization accuracy, avoiding skew problems caused by electrical control errors or differences in motor response. The rigid connection between the transmission shaft 39 and the drive shaft 41 ensures strict synchronization of the lifting actions of the two lifting screws 42, keeping the driven components (such as the pressure plate 2 or the pressing unit) in a horizontal position and with uniform force during the lifting process, thus improving the consistency and stability of carton pressing or shaping. The gear and screw meshing transmission method has a self-locking characteristic, maintaining its position after power failure, enhancing the safety of the equipment.

[0062] The positioning mechanism includes a positioning motor 44 disposed at the end of the translation section along the conveying direction, a positioning gear 45 disposed at the output end of the positioning motor 44, a positioning rack 46 perpendicular to the roller and meshing with the positioning gear 45, a guide assembly 47 disposed parallel to the positioning rack 46, and a positioning plate 48 disposed on the positioning rack 46 and the guide assembly 47; the transverse pushing mechanism includes a transverse pushing motor 49, a driving pulley 50 connected to the output end of the transverse pushing motor 49, a driven pulley 51, a synchronous belt 52 wound between the driving pulley 50 and the driven pulley 51 and whose projection is parallel to the roller, a pusher plate 53 disposed on the synchronous belt 52, and a plurality of push rods 54 disposed on the pusher plate 53 and located in the gap between adjacent rollers.

[0063] After the carton is fed into the translation section by the roller conveyor along its length, the positioning mechanism starts to operate: the positioning motor 44 drives the positioning gear 45 to rotate, and the positioning rack 46, which meshes with the positioning gear 45, moves in a direction perpendicular to the roller (i.e., the carton conveying direction). The guide component 47 ensures the linear movement of the positioning rack 46, and the positioning plate 48, which is set on the positioning rack 46 and the guide component 47, extends out to block the front end of the carton in the forward direction and accurately position it at the preset coordinate position. After positioning is completed, the positioning plate 48 retracts. Then the transverse pushing mechanism starts: the transverse pushing motor 49 drives the drive pulley 50 to rotate, which drives the driven pulley 51 through the synchronous belt 52. The synchronous belt 52 is parallel to the roller projection (i.e., along the width direction of the carton). The pusher plate 53 set on the synchronous belt 52 moves with the synchronous belt 52. Several pusher rods 54 on the pusher plate 53 are respectively located in the gap between adjacent rollers, pushing the carton along the width direction and smoothly pushing it to the short side sealing section.

[0064] This translation section uses a positioning mechanism to precisely lock the carton's position during length-direction transport, providing accurate reference coordinates for subsequent short-side sealing and preventing misalignment due to positioning deviations. The positioning mechanism employs a motor-driven rack and pinion transmission, coupled with the guide assembly 47, offering advantages such as fast response, high positioning accuracy, and good stability. The positioning plate 48 retracts promptly after positioning, without interfering with subsequent lateral pushing actions. The lateral pushing mechanism uses a synchronous belt 52 for drive, with the pusher plate 53 moving continuously with it. The pusher rod 54's design, embedded in the roller gap, ensures uniform contact between the pusher rod 54 and the carton's side during pushing, preventing scratching or damage to the carton's bottom. The positioning mechanism and the lateral pushing mechanism work in tandem, enabling rapid and precise conversion of the carton's transport direction from length to width, effectively improving the consistency of the entire production line's cycle time and sealing quality.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A fully automatic carton sealing and assembling equipment suitable for multi-specification cartons, characterized in that, include: The feeding section, long side sealing section, transition section, translation section, and short side sealing section are set up sequentially according to the carton sealing and forming process. The feeding section, long side sealing section, transition section, and translation section all employ roller conveyor devices to achieve smooth conveying of the carton along its length; the short side sealing section employs a chain-type roller conveyor device to achieve conveying of the carton along its width. The feeding section includes a lateral width adjustment mechanism and a pre-compression shaping mechanism that is located above the roller conveyor and has an adjustable height. The long side sealing section includes a long side dispensing mechanism and a pressing mechanism arranged sequentially along the conveying direction. The long side dispensing mechanism is used to apply hot melt adhesive to the lower cover of the long side of the carton, and the pressing mechanism is used to press the upper cover of the long side and the lower cover of the long side together to complete the long side sealing of the carton. The translation section includes a positioning mechanism for positioning the carton to a preset position in the conveying direction, and a lateral pushing mechanism for pushing the positioned carton to the short side sealing section along its width direction. The short side sealing section includes a double chain conveying mechanism, a short side pressing mechanism located above the double chain conveying mechanism, a short side lower cover pressing mechanism, and a short side upper cover pressing mechanism; The transition section is equipped with a photoelectric sensor, which is used to collect the working status of the translation section and the short sealing section, and to temporarily store or transport cartons to the translation section according to the working status.

2. The fully automatic carton sealing and assembly equipment suitable for multi-specification cartons according to claim 1, characterized in that, The pre-pressing and shaping mechanism includes a lifting device, a pressure plate disposed at the lower end of the lifting device, a pressure roller located on one side of the pressure plate and arranged along the length of the carton, and a pre-pressing component disposed on one side of the pressure roller. The pre-pressing assembly includes a leveling rod extending along the carton conveying direction. The two ends of the leveling rod are respectively provided with a first pressing electric cylinder and a second pressing electric cylinder. The leveling rod is inclined relative to the carton conveying direction and gradually moves towards the roller along the conveying direction to cooperate with the pressure roller to complete the folding and flattening.

3. The fully automatic carton sealing equipment for multi-specification cartons according to claim 2, characterized in that, The lateral width adjustment mechanism includes a feed roller stop arranged along the carton conveying direction, a cylinder stop arranged on the side opposite to the feed roller stop, a slide rail arranged perpendicular to the cylinder stop, a slider that slides on the slide rail and is fixed at the lower end of the cylinder stop, and a width adjustment cylinder arranged at the lower end of the cylinder stop. The wide-range adjustment cylinder can drive the cylinder stop to move along the slide rail, thereby adjusting the distance between the cylinder stop and the feed roller stop.

4. The fully automatic carton sealing equipment for multi-specification cartons according to claim 2, characterized in that, The pressing mechanism includes a pre-pressing mechanism arranged sequentially along the conveying direction above the roller conveyor, a side positioning mechanism located on both sides of the roller conveyor, and a main pressing mechanism located above the roller conveyor. The pre-pressing mechanism is used to initially press the top of the carton and eliminate the springback gap of the carton cover; the long-side dispensing mechanism is used to spray hot melt adhesive onto the overlapping part of the long-side lower cover; the main pressing mechanism is used to apply constant pressure downward to the top cover of the carton; the side positioning mechanism simultaneously abuts against the carton from both sides in the width direction of the carton to fold the long-side upper cover downward and press it firmly onto the bonding surface coated with hot melt adhesive, thereby realizing the automatic sealing of the long side.

5. The fully automatic carton sealing and assembly equipment for multi-specification cartons according to claim 4, characterized in that, The pre-compression mechanism includes an electric pre-compression cylinder disposed above the roller conveyor and a pre-compression rod disposed at the output end of the electric pre-compression cylinder and perpendicular to the carton conveying direction; The side positioning mechanism includes a long side roller stop arranged along the carton conveying direction, a movable stop arranged on one side opposite to the long side roller stop, and a wedge-shaped folding guide surface arranged on one side of the roller stop; a movable nut is fixed at the lower end of the movable stop, a screw is threadedly connected to the movable nut, and a movable stop motor for driving the screw to rotate is provided at one end of the screw. The main pressing mechanism includes a lifting device mounted above the roller conveyor, a pressing unit located at the lower end of the lifting device, and an auxiliary support assembly. The auxiliary support assembly includes a support frame and an auxiliary conveying wheel rotatably disposed at the lower end of the support frame.

6. The fully automatic carton sealing and assembly equipment for multi-specification cartons according to claim 5, characterized in that, The dual-chain conveyor mechanism includes a fixed chain machine and a movable chain machine arranged opposite each other, forming a channel for conveying cartons; The short-side pressing mechanism includes a lifting device and two pressing units disposed at the lower end of the device; The short side lower cover pressing mechanism includes a lifting frame, an ear-punching mechanism, a lower cover glue dispensing mechanism, and a lower cover flipping guide plate, all arranged on the lifting frame and sequentially along the carton conveying direction. The short-side top cover pressing mechanism includes two sets of glue guns and top cover sealing devices symmetrically arranged along the carton conveying path on the outside of the fixed chain machine and the movable chain machine; The pressing unit includes a pressing motor, a driving synchronous pulley, a driven synchronous pulley, and a belt tensioned between the driving and driven synchronous pulleys. The pressing motor drives the belt and moves the carton along the conveying direction.

7. The fully automatic carton sealing and assembly equipment suitable for multi-specification cartons according to claim 6, characterized in that, The cover sealing device includes two oppositely arranged fixed sealing units and a movable sealing unit; Both the fixed sealing unit and the movable sealing unit include a sealing bracket, a plurality of sealing push rods disposed on the sealing bracket, and a sealing plate disposed at the lower end of the sealing push rods; The movable sealing unit also includes a guide component and a movable sealing component that are perpendicular to the sealing bracket; The movable sealing assembly includes a sealing rack, a sealing gear meshing with the sealing rack, and a sealing motor that drives the sealing gear to rotate.

8. The fully automatic carton sealing and assembly equipment for multi-specification cartons according to claim 7, characterized in that, Both the fixed chain machine and the movable chain machine include a chain machine body and several push plates symmetrically arranged on the chain machine body; The movable chain machine also includes guide components and movable chain components vertically disposed at both ends of the chain machine body; The movable chain assembly includes a movable chain motor mounted on the chain machine body, a movable chain gear mounted at the output end of the movable chain motor, and a movable chain rack meshing with and fixedly mounted on the movable chain gear.

9. The fully automatic carton sealing and assembly equipment for multi-specification cartons according to claim 6, characterized in that, The lifting device includes a horizontally arranged drive shaft and two lifting components symmetrically arranged at both ends of the drive shaft; the lifting components include a drive shaft coaxially connected to the drive shaft and a lifting screw meshing with the drive shaft and arranged vertically. One of the drive shafts is connected to a lifting motor, which drives the drive shaft connected to it to rotate. This drive shaft drives another drive shaft to rotate synchronously through the transmission shaft. The two drive shafts drive their corresponding lifting screws to lift synchronously.

10. The fully automatic carton sealing and assembling equipment suitable for multi-specification cartons according to claim 1, characterized in that, The positioning mechanism includes a positioning motor disposed at the end of the translation section along the conveying direction, a positioning gear disposed at the output end of the positioning motor, a positioning rack perpendicular to the roller and meshing with the positioning gear, a guide assembly disposed parallel to the positioning rack, and a positioning plate disposed on the positioning rack and the guide assembly. The lateral pushing mechanism includes a lateral pushing motor, a driving pulley connected to the output end of the lateral pushing motor, a driven pulley, a synchronous belt wound between the driving pulley and the driven pulley and whose projection is parallel to the roller, a pusher plate disposed on the synchronous belt, and a plurality of push rods disposed on the pusher plate and located in the gap between adjacent rollers.

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