Paper box three-dimensional forming production line
By designing a 3D forming production line for paper boxes, the problems of deformation and process connection during the transformation of sheet paper boxes were solved, achieving efficient and precise 3D forming, improving forming accuracy and production efficiency, and reducing the defect rate.
Patent Information
- Application Number
- CN202610184617.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-09
- Publication Date
- 2026-04-03
AI Technical Summary
Existing paper box forming equipment suffers from low forming accuracy and poor efficiency in the process of converting sheet paper boxes into three-dimensional finished products. This is mainly because stacked sheet paper boxes are prone to rhomboid or irregular deformation after being unfolded, and the connection design of each forming process is not reasonable enough, resulting in problems such as positional movement and uneven bonding.
A three-dimensional forming production line for paper boxes was designed, including a box opening and feeding mechanism, a feeding and conveying mechanism, a paper box folding mechanism, and a circulation system. The folding mechanism offsets the rebound stress, and each mechanism is precisely positioned to achieve fully automated continuous processing of sheet paper boxes. It also performs processes such as glue scraping, folding, and tongue insertion in a coordinated manner, thereby improving forming accuracy and efficiency.
It enables the efficient and precise transformation of sheet-like cardboard boxes into three-dimensional finished products, improving molding accuracy and production efficiency, reducing defect rates, and ensuring the stability and quality of finished products.
Smart Images
Figure CN121777495A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of paper box forming technology, and more specifically, to a three-dimensional paper box forming production line. Background Technology
[0002] As a packaging medium that combines protection and economy, paper boxes are widely used in many industries such as food, daily chemicals, electronics, and pharmaceuticals. Their forming quality is directly related to the integrity and appearance of the product packaging, while production efficiency profoundly affects the scale production benefits of enterprises.
[0003] Currently, while existing automated forming equipment has achieved mechanization of some processes, it still has shortcomings in areas such as integrated process design and targeted solutions to key problems during the forming process, making it difficult to achieve efficient and precise transformation from sheet-like cardboard boxes to three-dimensional finished products. On the one hand, stacked sheet-like cardboard boxes have strong overlapping stress. After unfolding, due to the elastic rebound of the material, the cardboard boxes are prone to rhomboid or irregular deformation, causing the positioning reference of subsequent folding, tongue insertion, and other processes to shift, directly affecting the forming accuracy. On the other hand, the connection design of each forming process is not reasonable enough. The pre-folding, glue scraping, folding, tongue insertion, and compaction processes of some equipment are independent of each other, lacking an efficient and coordinated conveying and positioning mechanism. This not only results in a long production cycle and low efficiency, but also easily leads to positional movement during cardboard box transfer, causing problems such as uneven glue scraping, side cover folding wrinkles, and misaligned bottom cover tongue insertion. Summary of the Invention
[0004] The purpose of this invention is to provide a three-dimensional forming production line for paper boxes, which solves the problems of low forming accuracy and poor efficiency caused by the springback deformation of sheet paper boxes and poor process connection.
[0005] This invention is achieved through the following technical solution: a three-dimensional forming production line for paper boxes, comprising: a box opening and feeding mechanism, a feeding and conveying mechanism, a paper box folding mechanism, and a circulation system;
[0006] The box opening and feeding mechanism is used to separate and unfold the stacked sheet-like cardboard boxes one by one; The feeding and conveying mechanism receives the cardboard boxes from the box opening and feeding mechanism, and then limits and transfers the cardboard boxes to the cardboard box reversing mechanism; The paper box reversing mechanism is used to fold the paper box in the opposite direction to the original stacking direction; The circulation system includes a circulation conveyor line, on which are sequentially installed a tongue pre-folding mechanism, a lid glue scraping mechanism, a box mouth glue scraping mechanism, a side cover folding mechanism, a bottom cover tongue insertion mechanism, a bottom cover forming mechanism, and a rotary unloading mechanism. On the circulation conveyor line, the following processes are performed in sequence: pressing and shaping the bottom cover tongue of the paper box, scraping glue on the inside of the bottom cover, scraping glue on the box mouth, folding the side cover of the paper box, flipping the bottom cover of the paper box, inserting the bottom cover tongue into the slot of the paper box body, pressing the bottom cover of the paper box, and unloading and transferring the paper box.
[0007] Furthermore, the feeding and conveying mechanism includes a linear conveyor line for conveying the paper box, and the linear conveyor line is provided with limiting claws that contact the two sides of the paper box for horizontally clamping the paper box and a stop bar that abuts against the top side of the paper box for vertically limiting the paper box.
[0008] Furthermore, the cardboard box folding mechanism includes a support and a translation mechanism; The bracket is equipped with a folding assembly and a slide rail for horizontal linear conveying of the paper box. The folding assembly includes a fixed seat, a swing arm, and a pressure bar. The fixed seat is connected to the bracket and arranged on both sides of the slide rail. A first motor for driving the swing arm to swing is provided on one side of the fixed seat. One end of the swing arm is hinged to the fixed seat, and the other end of the swing arm is hinged to the pressure bar. The pressure bar contacts the top of the paper box to press the paper box. The translation mechanism is mounted above the support frame and is used to transfer cardboard boxes.
[0009] Furthermore, the tongue pre-folding mechanism, the lid glue scraping mechanism, the box mouth glue scraping mechanism, the side cover folding mechanism, the bottom cover tongue insertion mechanism, and the bottom cover forming mechanism all include a box pressing lifting platform for pressing the carton onto the circulating conveyor line.
[0010] Furthermore, the tongue pre-folding mechanism also includes a first cylinder and a second cylinder. The first cylinder is vertically telescopically connected to a pressing plate for pressing the bottom cover of the carton, and the second cylinder is telescopically connected to a roller that rolls and contacts the bottom cover tongue for rolling and folding the bottom cover tongue along the edge of the pressing plate.
[0011] Furthermore, the lid scraping mechanism also includes a first linear electric cylinder, the output shaft of which is horizontally and laterally connected to a first platform, on which a first glue gun is mounted. The glue scraping mechanism at the box opening also includes a second linear electric cylinder. The output shaft of the second linear electric cylinder is horizontally driven and connected to a second platform. A third cylinder is installed on the second platform. The third cylinder is horizontally driven and connected to a second glue gun. Both the lid scraping mechanism and the opening scraping mechanism are equipped with levers on their pressing and lifting platforms for prying open the side cover of the cardboard box to the outside.
[0012] Furthermore, the side cover folding mechanism includes a third linear electric cylinder, the output shaft of which is horizontally and laterally driven to a third platform, and a swing cylinder is provided on the third platform. The swing cylinder is oscillatingly connected to a lever for folding the side cover of the paper box inward.
[0013] Furthermore, the bottom cover tongue mechanism includes a second motor, the output shaft of which is rotatably connected to a swing plate for flipping the bottom cover of the cardboard box upwards. The pressing and lifting platform of the bottom cover tongue mechanism is provided with an arc guide plate and a fourth platform. The arc guide plate abuts against the bottom cover tongue to guide the bottom cover tongue into the cardboard box slot. A fourth linear electric cylinder is provided on the fourth platform. The output shaft of the fourth linear electric cylinder is horizontally driven and connected to a push rod. After passing through the arc guide plate, the push rod abuts against the position of the bottom cover tongue of the cardboard box to push the bottom cover tongue into the cardboard box slot.
[0014] Furthermore, the bottom cover forming mechanism includes a cover pressing cylinder and a cover pressing electric cylinder. The output shaft of the cover pressing cylinder is horizontally driven to connect a backing plate that abuts against the bottom cover of the carton. The output shaft of the cover pressing electric cylinder is vertically driven to lift and lower a roller that rolls against the bottom cover of the carton.
[0015] Furthermore, the rotary feeding mechanism includes a transverse movement mechanism, a vertical movement mechanism is horizontally driven and connected to the transverse movement mechanism, a frame is vertically driven and connected to the vertical movement mechanism, and a suction cup for adsorbing paper boxes is horizontally rotatably connected inside the frame.
[0016] This invention has at least the following advantages and beneficial effects: by setting up a box opening and feeding mechanism, a feeding conveyor, a paper box folding mechanism, and a circulation system containing multiple processes, fully automated continuous processing of sheet-shaped paper boxes is achieved. The folding mechanism counteracts springback stress, each mechanism is precisely positioned, and processes such as glue scraping, folding, and tongue insertion work together, with double compaction strengthening the adhesion, improving molding accuracy, production efficiency, and finished product stability, and reducing the defect rate. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a three-dimensional forming production line for paper boxes provided by the present invention.
[0018] Figure 2 This is a partial schematic diagram of the box opening and feeding mechanism and the feeding conveying mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0019] Figure 3 This is a schematic diagram of the opening and feeding mechanism and the feeding conveying mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0020] Figure 4 This is a partial schematic diagram of the feeding and conveying mechanism and the paper box folding mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0021] Figure 5 This is a schematic diagram of the translation mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0022] Figure 6 This is a schematic diagram of the structure of a folding component in a three-dimensional forming production line for paper boxes provided by the present invention.
[0023] Figure 7 This is a partial schematic diagram of the tongue pre-folding mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0024] Figure 8 This is a partial schematic diagram of the glue scraping mechanism for the lid in a three-dimensional forming production line for paper boxes provided by the present invention.
[0025] Figure 9 This is a partial schematic diagram of the first glue gun in a three-dimensional paper box forming production line provided by the present invention.
[0026] Figure 10 This is a partial schematic diagram of the glue scraping mechanism at the box opening in a three-dimensional forming production line for paper boxes provided by the present invention.
[0027] Figure 11 This is a partial schematic diagram of the second glue gun in a three-dimensional forming production line for paper boxes provided by the present invention.
[0028] Figure 12 This is a partial schematic diagram of a side cover folding mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0029] Figure 13 This is a partial schematic diagram of a swing cylinder in a three-dimensional forming production line for paper boxes provided by the present invention.
[0030] Figure 14 This is a partial schematic diagram of the bottom cover insert mechanism in a three-dimensional forming production line for paper boxes provided by the present invention.
[0031] Figure 15 This is a partial schematic diagram from another perspective of the bottom cover insertion tongue mechanism in a three-dimensional paper box forming production line provided by the present invention.
[0032] Figure 16 This is a partial schematic diagram of the bottom cover forming mechanism in a three-dimensional paper box forming production line provided by the present invention.
[0033] Figure 17 This is a partial schematic diagram of a rotary feeding mechanism in a three-dimensional paper box forming production line provided by the present invention.
[0034] Reference numerals: 1-Box opening and feeding mechanism, 2-Feeding conveyor mechanism, 21-Linear conveyor line, 22-Limit claw, 23-Stop bar, 3-Carton folding mechanism, 31-Bracket, 32-Translation mechanism, 33-Folding assembly, 331-Fixed seat, 332-Swing bar, 333-Pressure bar, 34-Slide rail, 4-Circulating conveyor line, 41-Box pressing lifting platform, 5-Tongue pre-folding mechanism, 51-First cylinder, 52-Second cylinder, 53-Edge pressing plate, 54-Roller, 6-Box lid glue scraping mechanism, 61-First linear electric cylinder, 62-First platform, 63-First glue gun, 64-Pulley, 7-Box mouth glue scraping machine Structure, 71-Second linear electric cylinder, 72-Second platform, 73-Third cylinder, 74-Second glue gun, 8-Side cover folding mechanism, 81-Third linear electric cylinder, 82-Third platform, 83-Swing cylinder, 84-Pulley, 9-Bottom cover tongue mechanism, 91-Swing plate, 92-Circular arc guide plate, 93-Fourth platform, 94-Fourth linear electric cylinder, 95-Top rod, 10-Bottom cover forming mechanism, 101-Capping cylinder, 102-Capping electric cylinder, 103-Backing plate, 104-Roller, 20-Rotating unloading mechanism, 201-Horizontal movement mechanism, 202-Vertical movement mechanism, 203-Frame, 204-Suction cup. Detailed Implementation
[0035] The specific implementation method is described below with reference to the accompanying drawings.
[0036] Example like Figures 1 to 17 As shown, this embodiment mainly discloses a three-dimensional forming production line for paper boxes, including: a box opening and feeding mechanism 1, a feeding and conveying mechanism 2, a paper box folding mechanism 3, and a circulation system; The box-opening and feeding mechanism 1 is used to separate and unfold stacked sheet-like cardboard boxes one by one. Specifically, the box-opening and feeding mechanism 1 includes a storage bin, a planetary gear drive unit, and a vacuum suction head assembly. The storage bin is used to store the stacked sheet-like cardboard boxes, and its inner side is equipped with an elastic pressure plate to prevent the stacked sheet-like cardboard boxes from tipping over. The bottom is equipped with auxiliary separation rollers. The planetary gear drive unit includes a sun gear, planet gears, and a fixed gear ring. The sun gear is fixedly connected to the output shaft of the drive motor. The planet gear shafts are connected to the vacuum nozzle of the vacuum suction head assembly through a crank connecting rod. The vacuum nozzle is connected to a vacuum generator through an air pipe. During execution, the drive motor drives the sun gear to rotate. Through the revolution and rotation of the planet gears, the vacuum suction head completes the cyclic action of approaching the cardboard box sheet, vacuum suction, rotation unfolding, and release to the conveying mechanism. Relying on the pre-made fold lines of the sheet-like cardboard box and the tensile tension generated by the vacuum suction head during the movement, combined with the pressing and stretching effect brought by the reciprocating suction action, the stacking stress of the sheet-like cardboard box is offset, causing it to unfold into a three-dimensional structure along the pre-made fold lines. Meanwhile, the cycloidal motion trajectory ensures that the suction head can accurately connect with the feeding conveyor 2 station after unfolding, preventing the cardboard box from falling or deforming.
[0037] The feeding conveyor 2 receives the paper box from the opening and feeding mechanism 1 and limits and transfers the paper box to the paper box folding mechanism 3; the paper box folding mechanism 3 is used to fold the paper box in the opposite direction of the original stacking direction to correct the elastic deformation. The circulation system includes a circulating conveyor line 4, on which are sequentially installed a tongue pre-folding mechanism 5, a lid glue scraping mechanism 6, a box mouth glue scraping mechanism 7, a side cover folding mechanism 8, a bottom cover tongue mechanism 9, a bottom cover forming mechanism 10, and a rotary unloading mechanism 20. On the circulating conveyor line 4, the following processes are performed sequentially: pressing and shaping the bottom cover tongue, scraping glue on the inside of the bottom cover, scraping glue on the box mouth, folding the side covers, flipping the bottom cover, inserting the bottom cover tongue into the box slot, pressing the bottom cover, and unloading and transferring the box. Specifically, the circulating conveyor line 4 can adopt existing technology and is an intermittent transmission design. The circulating conveyor line 4 is equipped with locking seats that engage with the sides of the box, providing shaping for the box. It should be noted that the circulating conveyor line 4 can process three boxes as a group, improving production efficiency.
[0038] Furthermore, in specific implementation, such as Figure 2 and Figure 3 As shown, the feeding and conveying mechanism 2 provided in this embodiment of the invention includes a linear conveyor line 21 for conveying cardboard boxes. The linear conveyor line 21 is equipped with limiting claws 22 that contact both sides of the cardboard box for horizontal clamping, and stop rods 23 that abut against the top side of the cardboard box for vertical positioning. Specifically, the linear conveyor line 21 adopts a belt drive structure and is driven by a stepper motor to match the cycle time of subsequent workstations. The limiting claws 22 are installed on the linear conveyor line 21 in the conveying direction. The limiting claws 22 are two correspondingly cooperating uprights, and the distance between the two uprights corresponds to the width of the cardboard box. The stop rods 23 are two longitudinal metal rods, set on a crossbeam above the rear section of the linear conveyor line 21, and their height can be adjusted as needed using adjusting bolts. During execution, the cardboard box is released from the opening and feeding mechanism 1 onto the belt surface of the linear conveyor line 21. The stepper motor drives the belt to move forward at a constant speed. At the same time, the limiting claw 22 engages with both sides of the cardboard box (after unfolding, the initial placement direction of the cardboard box is: one side of the cardboard box is placed horizontally on the linear conveyor line 21, and its two vertical sides are perpendicular to the conveying direction of the linear conveyor line 21). The stop rod 23 abuts against the top surface of the cardboard box from the vertical direction, forming a three-dimensional limit, restricting the movement of the cardboard box during the conveying process, realizing the shaping and transfer of the cardboard box, effectively avoiding deformation or positional deviation of the cardboard box during the transfer process, and ensuring that the subsequent cardboard box folding mechanism 3 can accurately receive it.
[0039] Furthermore, in specific implementation, such as Figures 4 to 6 As shown, the paper box folding mechanism 3 provided in the embodiment of the present invention includes a support 31 and a translation mechanism 32; The bracket 31 is equipped with a folding assembly 33 and a slide rail 34 for horizontal linear conveying of the paper box. The folding assembly 33 includes a fixed base 331, a swing rod 332, and a pressure rod 333. The fixed base 331 is connected to the bracket 31 and arranged on both sides of the slide rail 34. A first motor for driving the swing rod 332 to swing is provided on one side of the fixed base 331. One end of the swing rod 332 is hinged to the fixed base 331, and the other end of the swing rod 332 is hinged to the pressure rod 333. The pressure rod 333 contacts the top of the paper box to press the paper box. The translation mechanism 32 is mounted above the bracket 31 for transferring the paper box.
[0040] Specifically, the support 31 is a rectangular frame 203 structure. Three parallel elongated slots are formed on the platform of the support 31 along the paper box conveying direction. A linear mechanism is installed below the support 31 along the slots, and a vacuum suction cup 204 is mounted on the linear mechanism. The vacuum suction cup 204 is connected to a vacuum generator via an air pipe to adsorb the bottom of the paper box and is driven by the linear mechanism to achieve horizontal linear movement of the paper box on the support 31. Limiting plates are set on both sides of the elongated slots at the feeding end of the support 31 to engage the paper box. A first motor is mounted on a fixed base 331 on one side of the support 31. One end of a swing arm 332 is hinged to the fixed base 331 via a pin to form a rotating pair, and the other end of the swing arm 332 is hinged to a backing plate 103, which is a long strip. The translation mechanism 32 can be a ball screw linear module, mounted on the feed end and discharge end above the bracket 31. The slider of the translation mechanism 32 is fixed with three sets of claws, corresponding to three through slots, for transferring the paper box from the feeding conveyor 2 to the paper box folding mechanism 3, and transferring the paper box from the paper box folding mechanism 3 to the tongue pre-folding mechanism 5.
[0041] During execution, the claws of the feeding end translation mechanism 32 grab three cardboard boxes from the feeding conveying mechanism 2 and accurately place them on the three through slots of the bracket 31, and engage them between the limiting plates. The suction cup 204 below the bracket 31 is activated to adsorb the bottom of the cardboard boxes, thus positioning them. Then, the linear mechanism drives the cardboard boxes to move along the long through slot. When the boxes reach the middle of the long through slot, the first motor drives the swing rod 332 to swing around the hinge point of the fixed seat 331, causing the abutment plate 103 to press down in the opposite direction of the original overlapping direction of the cardboard sheet, thus over-folding the cardboard boxes. After the over-folding is completed, the vacuum suction cup 204 below releases the vacuum, and the limiting claws 22 of the discharging end translation mechanism 32 grab the cardboard boxes and transfer them to the tongue pre-folding mechanism 5 to complete the over-folding process. The over-folding causes the cardboard boxes to undergo plastic deformation, which counteracts the elastic rebound stress after the sheet cardboard boxes are unfolded, making the shape of the cardboard boxes more square and reducing the possibility of diamond-shaped boxes.
[0042] Furthermore, in specific implementation, such as Figure 7As shown, the tongue pre-folding mechanism 5, lid glue scraping mechanism 6, box mouth glue scraping mechanism 7, side cover folding mechanism 8, bottom cover tongue mechanism 9, and bottom cover forming mechanism 10 provided in the embodiments of the present invention all include a pressing lifting platform 41 for pressing the paper box onto the circulating conveyor line 4. Specifically, the pressing lifting platform 41 consists of a support, a linear guide rail, and a ball screw electric cylinder. The support is Z-shaped or L-shaped and is installed on the side of the circulating conveyor line 4. The linear guide rail is vertically installed on the vertical surface of the support and guides the movement of the lower pressing plate used to press the paper box. The ball screw electric cylinder is set on the upper plane of the support and is used to drive the lower pressing plate to move vertically and linearly.
[0043] During execution, once the cardboard box arrives at the corresponding mechanism station and stops along the circulating conveyor line 4, the ball screw electric cylinder is activated, driving the lower pressure plate to descend along the linear guide rail until the bottom surface of the lower pressure plate contacts the top surface of the cardboard box and applies a preset pressure. After the process at this station is completed, the ball screw electric cylinder drives the lower pressure plate to rise and reset. The lifting motion driven by the electric cylinder achieves the pressing and positioning of the cardboard box, and the preset pressure is used to fix the position of the cardboard box, preventing the cardboard box from shaking or shifting during subsequent processing.
[0044] Furthermore, in specific implementation, such as Figure 7 As shown, the tongue pre-folding mechanism 5 provided in this embodiment of the invention further includes a first cylinder 51 and a second cylinder 52. The first cylinder 51 is vertically and telescopically connected to a pressing plate 53 for pressing the bottom cover of the carton. The second cylinder 52 is telescopically connected to a roller 54 that rolls and contacts the bottom cover tongue for rolling and folding the bottom cover tongue along the edge of the pressing plate 53. Specifically, the first cylinder 51 is fixed below the pressing platform 41, the pressing plate 53 is a metal plate with an acute-angled folded edge, and the pressing position of the folded edge corresponds to the fold of the bottom cover of the carton and the bottom cover tongue; the roller 54 is connected to the output shaft of the second cylinder 52 through a bearing seat. During execution, after the pressing platform 41 presses the cardboard box, the first cylinder 51 starts to drive the pressing plate 53 to descend, pressing the bottom cover of the cardboard box. Then, the second cylinder 52 extends, driving the roller 54 to roll along the edge of the pressing plate 53, rolling and folding the bottom cover tongue. After the roller 54 maintains the pressed state for a preset time, the second cylinder 52 and the first cylinder 51 reset sequentially. Through the pressing and positioning of the pressing plate 53 and the rolling action of the roller 54, the bottom cover tongue undergoes plastic deformation, reducing the risk of springback in subsequent processes.
[0045] Furthermore, in specific implementation, such as Figures 8 to 11As shown, the box cover glue scraping mechanism 6 provided in the embodiment of the present invention further includes a first linear electric cylinder 61. The output shaft of the first linear electric cylinder 61 is horizontally driven and connected to a first platform 62. A first glue gun 63 is provided on the first platform 62. Specifically, the first linear electric cylinder 61 is horizontally fixed to the side of the circulating conveyor line 4, and the output shaft is fixedly connected to the first platform 62. Six first glue guns 63 are installed on the first platform 62 along the horizontal longitudinal direction. Two guns are arranged as a group, corresponding to three cardboard boxes. The nozzle of the first glue gun 63 is flat and the opening faces downward. The box opening glue scraping mechanism 7 also includes a second linear electric cylinder 71. The output shaft of the second linear electric cylinder 71 is horizontally driven and connected to a second platform 72. A third cylinder 73 is provided on the second platform 72. The third cylinder 73 is horizontally driven and connected to a second glue gun 74. Specifically, the nozzle of the second glue gun 74 is also flat and the opening faces upward. Both the lid scraping mechanism 6 and the opening scraping mechanism 7 have a lever 64 on their pressing platform 41 for prying open the side cover of the cardboard box to the outside. The lever 64 is a metal rod and is mounted on the bottom surface of the pressing platform 41 via a linear drive mechanism.
[0046] During execution, after the pressing and lifting platform 41 presses the cardboard box tightly, the linear drive mechanism drives the lever 64 to swing outwards to the corresponding cardboard box, opening the side cover and exposing the adhesive scraping surface. In the box cover adhesive scraping mechanism 6, the first linear electric cylinder 61 drives the first platform 62 to move, bringing the first glue gun 63 closer to the adhesive scraping surface and activating the first glue gun 63. Simultaneously, the first linear electric cylinder 61 retracts in the opposite direction, completing the longitudinal adhesive scraping. In the box opening adhesive scraping mechanism 7, the second linear electric cylinder 71 drives the second platform 72 to adjust its lateral position, and the third cylinder 73 drives the second glue gun 74 closer to the box opening surface, completing the lateral adhesive scraping. These mechanisms respectively adapt to the bonding requirements of the cardboard box side cover and the cardboard box bottom cover, improving the structural stability of the cardboard box after molding.
[0047] Furthermore, in specific implementation, such as Figure 12 and Figure 13As shown, the side cover folding mechanism 8 provided in this embodiment of the invention includes a third linear electric cylinder 81. The output shaft of the third linear electric cylinder 81 is horizontally driven and connected to a third platform 82. A swing cylinder 83 is provided on the third platform 82. The swing cylinder 83 is oscillatingly connected to a lever 84 for folding the side cover of the paper box inward. Specifically, the third linear electric cylinder 81 is horizontally fixed to the side of the circulating conveyor line 4. The output shaft of the third linear electric cylinder 81 is rigidly connected to the third platform 82. The swing cylinder 83 is fixed on the third platform 82, and the swing cylinder 83 drives the lever 84 to swing. During execution, the cardboard box rotates 180° via the circular turntable and arrives at the station of the side cover folding mechanism 8. The pressing lifting platform 41 presses and positions the box, and the third linear electric cylinder 81 drives the third platform 82 to move towards the cardboard box until the lever 84 approaches the side cover. The swing cylinder 83 then activates, causing the lever 84 to rotate from the outside of the cardboard box to the inside. The lever 84 abuts against the side cover and folds it inward. The output shaft of the third linear electric cylinder 81 extends further, allowing the lever 84 to enter the cardboard box. After maintaining this state for a preset time, the third linear electric cylinder 81 drives the platform to retract, and the swing cylinder 83 resets. The folding action is precise and controllable, improving the fit of the folded side cover and preventing wrinkles or incomplete fit.
[0048] Furthermore, in specific implementation, such as Figure 14 and Figure 15 As shown, the bottom cover tongue mechanism 9 provided in the embodiment of the present invention includes a second motor. The output shaft of the second motor is rotatably connected to a swing plate 91 for flipping up the bottom cover of the paper box. The pressing and lifting platform 41 of the bottom cover tongue mechanism 9 is provided with an arc guide plate 92 and a fourth platform 93. The arc guide plate 92 abuts against the bottom cover tongue to guide the bottom cover tongue into the paper box slot. A fourth linear electric cylinder 94 is provided on the fourth platform 93. The output shaft of the fourth linear electric cylinder 94 is horizontally driven to connect a push rod 95. The push rod 95 passes through the arc guide plate 92 and abuts against the position of the bottom cover tongue of the paper box bottom cover to push the bottom cover tongue into the paper box slot.
[0049] Specifically, the swing plate 91 can be an L-shaped plastic plate, which is initially placed flat on the platform of the circulating conveyor line 4. The edge of the vertical folding section is chamfered so that when the paper box is conveyed to this station, the bottom cover of the paper box is guided by the chamfered position to contact the top of the vertical folding section, so that the bottom cover of the paper box is slightly lifted. The arc guide plate 92 is fixed to the bottom surface of the pressing platform 41. The inner arc matches the curve swept by the bottom cover tongue and the fold of the paper box cover (as well as the edge of the bottom cover tongue). The arc guide plate 92 and the fourth platform 93 move synchronously with the lower pressure plate of the pressing platform 41. The fourth linear electric cylinder 94 is horizontally installed on the fourth platform 93. The output shaft of the fourth linear electric cylinder 94 is fixedly connected to the push rod 95.
[0050] During execution, when the cardboard box is conveyed to the station of the bottom cover tongue mechanism 9, the second motor drives the swing plate 91 to flip upward, causing the bottom cover of the cardboard box to fold upward. The arc guide plate 92 guides the bottom cover tongue, correcting its movement trajectory and preventing it from coming out. Subsequently, the fourth linear electric cylinder 94 drives the push rod 95 forward, pushing the bottom cover tongue into the box slot precisely. This improves the insertion accuracy of the bottom cover tongue and avoids faults such as tongue misalignment or failure to insert. The cooperative design of the arc guide plate 92 and the push rod 95 reduces the risk of tongue damage.
[0051] Furthermore, in specific implementation, such as Figure 16 As shown, the bottom cover forming mechanism 10 provided in the embodiment of the present invention includes a cover pressing cylinder 101 and a cover pressing electric cylinder 102. The output shaft of the cover pressing cylinder 101 is horizontally driven to connect a stop plate 103 that abuts against the bottom cover of the paper box. The output shaft of the cover pressing electric cylinder 102 is vertically driven to lift and lower a roller 104 that rolls and contacts the bottom cover of the paper box.
[0052] Specifically, the output shaft of the capping cylinder 101 is fixedly connected to the back plate 103, which is a rectangular plate; the capping electric cylinder 102 is vertically installed on the frame below the workstation, with its output shaft set upward and connected to the roller 104 seat, and the roller 104 is installed in the roller 104 seat through bearings.
[0053] During execution, after the pressing platform 41 positions the bottom box, the pressing cylinder 101 first extends the driving plate 103 to horizontally press the bottom cover of the carton, holds it for a preset time, and then retracts the driving plate 103. Subsequently, the pressing electric cylinder 102 starts, driving the roller 104 to move vertically upwards and roll along the surface of the bottom cover. The roller 104 then returns to its original position, completing the pressing action. By combining the static pressing of the driving plate 103 with the dynamic rolling pressing of the roller 104, the bonding effect is doubled, eliminating gaps between the adhesive layer and the contact surface. This ensures that the adhesive layer on the inner side of the bottom cover of the carton is tightly bonded to the side cover of the carton. The resulting carton structure has high strength and is less prone to falling apart or deforming, further improving the finished product qualification rate.
[0054] Furthermore, in specific implementation, such as Figure 17 As shown, the rotary feeding mechanism 20 provided in the embodiment of the present invention includes a horizontal moving mechanism 201, a vertical moving mechanism 202 is horizontally driven connected to the horizontal moving mechanism 201, a frame 203 is vertically driven connected to the vertical moving mechanism 202, and a suction cup 204 for adsorbing paper boxes is horizontally rotatably connected inside the frame 203.
[0055] Specifically, the horizontal movement mechanism 201 adopts a ball screw linear module, which is horizontally mounted above the unloading area; the vertical movement mechanism 202 is an electric push rod, which is slidably connected to the guide rail of the horizontal movement mechanism 201 through a slider, and the output shaft of the electric push rod is vertically downward and fixedly connected to the frame 203; the frame 203 is a rectangular metal frame, and a rotating shaft is horizontally rotatably connected inside through a bearing. Suction cups 204 are radially mounted on the rotating shaft, and each suction cup 204 corresponds to a cardboard box. The suction cups 204 are connected to a vacuum generator through an air pipe.
[0056] During execution, the horizontal movement mechanism 201 drives the vertical movement mechanism 202 to move above the finished product area of the circulating conveyor line 4. The vertical movement mechanism 202 drives the frame 203 to descend. After the suction cup 204 contacts the top surface of the carton, vacuum adsorption is initiated. The frame 203 moves above the feeding belt under the drive of the horizontal movement mechanism 201. The motor drives the rotating shaft to rotate the suction cup 204, making the bottom cover of the carton parallel to the surface of the belt. Then the vacuum is released, and the carton falls onto the feeding belt. Through the coordinated action of the horizontal movement mechanism 201, the vertical movement mechanism 202, and the rotating shaft inside the frame 203, vacuum adsorption is used to achieve damage-free gripping of the carton. The rotating shaft adjusts the carton's posture to adapt to subsequent conveying requirements.
Claims
1. A three-dimensional forming production line for paper boxes, characterized in that, include: The box opening and feeding mechanism (1), the feeding conveying mechanism (2), the carton folding mechanism (3), and the circulation system; The box opening and feeding mechanism (1) is used to separate and unfold the stacked sheet-like paper boxes one by one; The feeding conveyor (2) receives the paper box from the opening feeding mechanism (1) and limits and transfers the paper box to the paper box folding mechanism (3); The paper box folding mechanism (3) is used to fold the paper box in the opposite direction to the original stacking direction of the paper box; The circulation system includes a circulation conveyor line (4), on which a tongue pre-folding mechanism (5), a lid glue scraping mechanism (6), a box mouth glue scraping mechanism (7), a side cover folding mechanism (8), a bottom cover tongue mechanism (9), a bottom cover forming mechanism (10), and a rotating unloading mechanism (20) are sequentially arranged. On the circulation conveyor line (4), the following processes are performed in sequence: paper box bottom cover tongue pressing and shaping, paper box bottom cover inner glue scraping, paper box mouth glue scraping, paper box side cover folding, paper box bottom cover flipping and bottom cover tongue insertion into paper box slot, paper box bottom cover compaction, and paper box unloading and transfer.
2. The three-dimensional forming production line for paper boxes according to claim 1, characterized in that, The feeding and conveying mechanism (2) includes a linear conveyor line (21) for conveying paper boxes. The linear conveyor line (21) is provided with limiting claws (22) that contact the two sides of the paper box for horizontally clamping the paper box and a stop bar (23) that abuts against the top side of the paper box for vertically limiting the paper box.
3. The three-dimensional forming production line for paper boxes according to claim 1, characterized in that, The paper box folding mechanism (3) includes a support (31) and a translation mechanism (32); The bracket (31) is provided with a folding assembly (33) and a slide rail (34) for horizontal linear conveying of the paper box. The folding assembly (33) includes a fixed base (331), a swing rod (332) and a pressure rod (333). The fixed base (331) is connected to the bracket (31) and arranged on both sides of the slide rail (34). A first motor for driving the swing rod (332) to swing is provided on one side of the fixed base (331). One end of the swing rod (332) is hinged to the fixed base (331), and the other end of the swing rod (332) is hinged to the pressure rod (333). The pressure rod (333) contacts the top of the paper box for pressing the paper box. The translation mechanism (32) is mounted above the support (31) for transferring the cardboard box.
4. The three-dimensional forming production line for paper boxes according to claim 1, characterized in that, The tongue pre-folding mechanism (5), the lid glue scraping mechanism (6), the box mouth glue scraping mechanism (7), the side cover folding mechanism (8), the bottom cover tongue mechanism (9), and the bottom cover forming mechanism (10) all include a box pressing lifting platform (41) for pressing the paper box onto the circulating conveyor line (4).
5. A three-dimensional forming production line for paper boxes according to claim 4, characterized in that, The tongue pre-folding mechanism (5) further includes a first cylinder (51) and a second cylinder (52). The first cylinder (51) is vertically telescopically connected to a pressing plate (53) for pressing the bottom cover of the carton. The second cylinder (52) is telescopically connected to a roller (54) that rolls and contacts the bottom cover tongue and is used to roll and fold the bottom cover tongue along the edge of the pressing plate (53).
6. A three-dimensional forming production line for paper boxes according to claim 4, characterized in that, The box cover adhesive scraping mechanism (6) further includes a first linear electric cylinder (61), the output shaft of the first linear electric cylinder (61) is horizontally driven to connect a first platform (62), and a first glue gun (63) is provided on the first platform (62). The box opening glue scraping mechanism (7) also includes a second linear electric cylinder (71), the output shaft of the second linear electric cylinder (71) is horizontally driven to connect to a second platform (72), a third cylinder (73) is provided on the second platform (72), and the third cylinder (73) is horizontally driven to connect to a second glue gun (74). Both the lid scraping mechanism (6) and the opening scraping mechanism (7) are equipped with levers (64) on the pressing lifting platform (41) for opening the side cover of the paper box to the outside of the paper box.
7. A three-dimensional forming production line for paper boxes according to claim 4, characterized in that, The side cover folding mechanism (8) includes a third linear electric cylinder (81), the output shaft of which is horizontally driven to a third platform (82), and a swing cylinder (83) is provided on the third platform (82). The swing cylinder (83) is oscillatingly connected to a lever (84) for folding the side cover of the paper box to the inside of the paper box.
8. A three-dimensional forming production line for paper boxes according to claim 4, characterized in that, The bottom cover tongue mechanism (9) includes a second motor, the output shaft of which is rotatably connected to a swing plate (91) for flipping up the bottom cover of the paper box. The pressing lifting platform (41) of the bottom cover tongue mechanism (9) is provided with an arc guide plate (92) and a fourth platform (93). The arc guide plate (92) abuts against the bottom cover tongue to guide the bottom cover tongue into the paper box slot. The fourth platform (93) is provided with a fourth linear electric cylinder (94). The output shaft of the fourth linear electric cylinder (94) is horizontally driven to connect a push rod (95). The push rod (95) passes through the arc guide plate (92) and abuts against the position of the bottom cover tongue of the paper box to push the bottom cover tongue into the paper box slot.
9. A three-dimensional forming production line for paper boxes according to claim 4, characterized in that, The bottom cover forming mechanism (10) includes a cover pressing cylinder (101) and a cover pressing electric cylinder (102). The output shaft of the cover pressing cylinder (101) is horizontally driven to connect a stop plate (103) that abuts against the bottom cover of the carton. The output shaft of the cover pressing electric cylinder (102) is vertically driven to lift and lower a roller (104) that rolls against the bottom cover of the carton.
10. A three-dimensional forming production line for paper boxes according to claim 1, characterized in that, The rotating feeding mechanism (20) includes a horizontal moving mechanism (201), a vertical moving mechanism (202) is horizontally driven to the horizontal moving mechanism (201), a frame (203) is vertically driven to the vertical moving mechanism (202), and a suction cup (204) for adsorbing paper boxes is horizontally rotatably connected inside the frame (203).