Paperboard bending device, insertion interlocking mechanism and automatic production line

Abstract

The invention relates to the technical field of automatic packaging equipment, in particular to a paperboard bending device, an insertion interlocking mechanism and an automatic production line. The bending part is located at a downstream station of the pre-bending part, the bending part comprises a roll bending assembly, the roll bending assembly comprises a first roll wheel and a second roll wheel which are arranged at a preset interval, the roll bending assembly is connected with a driving mechanism, the driving mechanism drives the roll bending assembly to move relative to a paperboard, two bent edges of the paperboard are bent in sequence, and the first roll wheel and the second roll wheel are connected with the driving mechanism. And the flattening assembly is used for bending a single bent edge positioning part and is arranged at the pre-bending part and the bending part. According to the paperboard bending device, the inserting interlocking mechanism and the automatic production line, the problems that in the prior art, manual and semi-automatic production efficiency is low, product bending and interlocking forming quality is unstable, and the automation integration degree of the production line is not high are solved.

Description

Technical Field

[0001] This invention relates to the field of automated packaging equipment technology, and in particular to a cardboard bending device, an interlocking mechanism, and an automated production line. Background Technology

[0002] With the rapid development of the consumer electronics and gift packaging industries, the demand for paper products such as "sleeves" with SIM card ejector pins in mobile phone gift boxes and folding pads is increasing. These products typically require multi-directional bending of cardboard and interlocking molding through interlocking structures to replace traditional glue bonding, making them more environmentally friendly and aesthetically pleasing.

[0003] However, current technologies for forming and producing this type of cardboard largely rely on manual labor or semi-automated equipment. Manual production is not only inefficient and labor-intensive, but also struggles to ensure consistent bending angles and interlocking tightness, leading to inconsistent product quality. Existing automated equipment often struggles to adapt to the complex processes involved in cardboard folding, particularly when handling multi-directional bending and interlocking, easily resulting in inaccurate positioning, unsightly bending marks, failed interlocking, or damage to the cardboard. Furthermore, existing equipment lacks efficient integrated solutions for rejecting defective products and shaping finished products, limiting the improvement of overall production cycle time.

[0004] Therefore, there is an urgent need to design a production line that can achieve bending, interlocking forming and high degree of automation in order to solve the problems of low manual efficiency, poor forming quality and low equipment integration in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a cardboard bending device, an interlocking mechanism, and an automated production line to solve the problems of low efficiency in manual and semi-automated production, unstable product bending and interlocking forming quality, and low automation integration in the existing technology.

[0006] The technical solution of this invention is: a cardboard bending device, an interlocking mechanism, and an automatic production line, comprising: Pre-folded section; A bending section is located downstream of the pre-folding section. The bending section includes a roller bending assembly, which includes a first roller and a second roller with a preset distance. The roller bending assembly is connected to a drive mechanism, which drives the roller bending assembly to move relative to the cardboard, sequentially bending two bending edges of the cardboard, and / or a flattening assembly, which bends a single bending edge. The positioning part is provided at the pre-folded part and the bending part.

[0007] Preferably, the positioning part includes: Suction cup, which adheres to the surface of the cardboard; Mechanical grippers that clamp the edges of the cardboard; A fixed receiving cavity and a liftable pressure plate disposed above the receiving cavity. The pressure plate presses down on the cardboard so that the edge of the cardboard folds up along the side wall of the receiving cavity. The bending part folds the cardboard with the edge of the pressure plate as the bending reference line.

[0008] Preferably, the pre-folded portion includes: Pre-folding mechanism, wherein the pre-folding mechanism bends the edge of the cardboard in a first direction; The second pre-folding component bends the edge of the cardboard in a second direction, where the first direction intersects the second direction.

[0009] A cardboard interlocking mechanism is provided for connecting two opposite bent edges of a bent cardboard, wherein one bent edge has a protruding insertion part and the other bent edge has an insertion seam. The mechanism includes a molding assembly, which drives the bent edge with the insertion part to open relative to the insertion seam and generate deformation displacement, and drives the bent edge to reset and move so that the insertion part is inserted into the insertion seam.

[0010] An automated production line for cardboard includes: frame; A feeding and conveying mechanism is mounted on the frame; The detection mechanism is located downstream of the feeding and conveying mechanism; A pre-folding mechanism is located downstream of the detection mechanism; A transfer mechanism is disposed between the detection mechanism, the pre-folding mechanism, and the transmission forming part; A transmission forming section is located downstream of the pre-folding mechanism; A shaping and transmission mechanism is disposed downstream of the transmission forming section; The output conveyor line is located downstream of the shaping and conveying mechanism.

[0011] Preferably, the testing organization includes: Detection device; A defective product removal mechanism is provided on one side of the detection device; The first defective product box is located at the output end of the defective product removal mechanism.

[0012] Preferably, the pre-folding mechanism includes: A positioning mechanism is positioned at a predetermined edge around the cardboard. The positioning suction cup is set in the center of the preset position on the cardboard; A pre-folding push block is disposed on the side of the positioning suction cup.

[0013] Preferably, the transfer mechanism includes: First guide rail; The first transfer component is slidably connected to the first guide rail and is located upstream of the first guide rail; The second transfer component is slidably connected to the first guide rail and located downstream of the first guide rail.

[0014] Preferably, the transmission forming part includes: The indexing and transfer assembly is provided with a first station, a second station, a third station and a fourth station in sequence according to the production cycle. An inner mold assembly is movably mounted on the indexing and transfer assembly to move between workstations, and the inner mold assembly is equipped with a suction cup. The first station receives cardboard transferred by the transfer mechanism; the second station is equipped with a bending device; the third station is equipped with an interlocking mechanism; and the fourth station unloads the formed product to the shaping and conveying mechanism.

[0015] Preferably, the shaping and conveying mechanism includes a mounting frame with a shaping part, which shapes the non-interlocking bent edges of the product and conveys the shaped product to the output conveying line.

[0016] Compared with the prior art, the advantages of the present invention are: (1) By setting up a bending device that includes a pre-folding part and a bending part, and cooperating with the adsorption or clamping positioning of the positioning part, the automatic bending of the multi-directional edges of the cardboard is realized. In particular, by cooperating with the first roller and the second roller of the roller bending assembly, the two bending edges of the cardboard can be rolled and bent in sequence, which not only ensures the consistency of the bending angle, but also avoids damage to the surface of the cardboard by hard bending and improves the appearance quality of the finished product.

[0017] (2) By setting up a specific interlocking mechanism, the bending edge with the insertion part is driven by the combined molding component to open relative to the interlocking seam and generate deformation displacement, and then reset and insert, thus realizing the automated insertion interlocking connection of the cardboard bending edge. Compared with manual insertion, this mechanism not only greatly improves efficiency, but also ensures that the insertion part is accurately inserted into the interlocking seam through mechanical control, thus ensuring the firmness and uniformity of the molding.

[0018] (3) By setting up an integrated automatic production line, the processes of inspection, pre-folding, transmission forming, shaping and output are organically combined, realizing the fully automated processing and output of finished products, which greatly improves production efficiency and reduces labor costs. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the automated production line described in this invention; Figure 2 This is a schematic diagram of the feeding and conveying mechanism described in this invention; Figure 3 This is a schematic diagram of the testing mechanism described in this invention; Figure 4 This is a schematic diagram of the pre-folding mechanism described in this invention; Figure 5 This is a schematic diagram of the transfer mechanism described in this invention; Figure 6 This is a schematic diagram of the transmission forming part described in this invention; Figure 7 This is a schematic diagram of the bending mechanism at the second workstation of the present invention; Figure 8 This is a schematic diagram of the insertion interlock mechanism on the third workstation described in this invention; Figure 9 This is a schematic diagram of the material handling and conveying mechanism at the fourth workstation described in this invention; Figure 10 This is a schematic diagram of the shaping and transmission mechanism described in this invention; Figure 11 This is a schematic diagram of the conveyor line described in this invention; The components include: 1. Frame; 2. Feeding and conveying mechanism; 3. Detection mechanism; 31. Detection device; 32. Defective product removal mechanism; 33. First defective product box; 4. Pre-folding mechanism; 41. Positioning mechanism; 42. Positioning suction cup; 43. Pre-folding push block; 5. Transfer mechanism; 51. First guide rail; 52. First transfer assembly; 53. Second transfer assembly; 531. First driving component; 532. Second driving component; 533. Suction section; 5331. Suction nozzle row one; 5332. Suction nozzle row two; 6. Transmission forming section; 61. Indexing and transfer assembly; 62. First station; 63. Second station; 631. Second guide rail; 632. Second pre-folding assembly; 633. Flattening assembly; 634. Roller folding assembly; 6341. First roller; 6342. Second roller; 64. Third station; 641. Third guide rail; 642. Combined forming assembly; 65. Fourth station; 651. Fourth guide rail; 652. Upper and lower material handling assembly; 6521. Second defective product box; 66. Inner mold assembly; 7. Shaping and conveying mechanism; 71. Mounting frame; 72. Shaping section; 8. Conveyor line; 81. Tilting section. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] Example 1

[0022] like Figures 1 to 11As shown, an automated production line for cardboard is suitable for automated forming equipment that uses cardboard folding, interlocking, and forming processes, such as "sleeves" with SIM card pins in mobile phone gift boxes and folding pads. It includes a frame 1, on which, in the product production flow direction, are sequentially arranged a feeding conveyor 2, a detection mechanism 3, a pre-folding mechanism 4, a transfer mechanism 5, a transmission forming section 6, and a shaping and conveying mechanism 7, as well as an output conveyor line 8 at the end.

[0023] In this embodiment, the feeding and conveying mechanism 2 is a conveyor belt structure, and the conveyor belt has a pressure block or plate that limits and presses down on the cardboard. The pressure block or plate is elastically connected above the conveyor belt. The conveyor belt drives the cardboard to move, and the pressure block or plate presses against the surface of the cardboard under the action of elastic force. The pressure block or plate and the cardboard have rolling friction or sliding contact, and the pressing force can be adjusted according to the thickness of the cardboard. Specifically, it can be achieved by adjusting the spring compression or the counterweight. The pressing force is less than the driving force for cardboard transmission. In addition, a photoelectric sensor is provided at the feeding end of the conveyor belt to detect the positioning of the cardboard and is interlocked with the drive motor of the conveyor belt to ensure that the cardboard enters the detection area one sheet at a time, preventing jamming or misjudgment caused by stacking.

[0024] like Figure 3 and Figure 4 As shown, the detection mechanism 3 includes a detection device 31, a defective product removal mechanism 32, and a first defective product box 33. The detection device 31 detects whether the cardboard to be processed is qualified, and the defective product removal mechanism 32 removes unqualified cardboard. The first defective product box 33 is located at the output end of the defective product removal mechanism 32 and is used to receive and hold the removed unqualified cardboard. In a preferred embodiment, the detection device 31 is an industrial camera, and one or more sets can be set according to the target to be detected (such as the color, code, presence or absence of accessories, etc. of the cardboard). The industrial camera is mounted on an adjustable bracket, with adjustable focal length and shooting angle, and is equipped with a ring light source to provide uniform illumination and ensure clear images. The industrial camera is electrically connected to the control system and sends a signal to the defective product removal mechanism 32 when a defective product is detected. The defective product removal mechanism 32 includes a third driving component (a cylinder, telescopic rod, or other element or assembly capable of driving linear motion) and a guide plate driven by the third driving component. The guide plate has an inclined surface facing the first defective product box 33.

[0025] When the cardboard enters the inspection area, the inspection device 31 takes a picture and confirms whether the cardboard is qualified. If the cardboard is detected as defective, the third drive unit drives the guide plate to descend, blocking the cardboard from moving forward and guiding it to the first defective product box 33, after which the guide plate resets; if the cardboard is detected as good, the guide plate remains in place, and the cardboard continues to flow to the pre-folding station. To prevent the cardboard from shifting during the removal process, the descent action of the guide plate is quickly responded to through a rapid exhaust valve or servo control, and flexible baffles are provided on both sides of the guide plate to guide the cardboard to slide smoothly.

[0026] like Figure 4 As a preferred embodiment, the positioning mechanism 41 includes one or more fourth driving elements (elements or assemblies capable of driving linear motion, such as cylinders or telescopic rods) and positioning push blocks driven by the fourth driving elements. The positioning push blocks include long-side push blocks for positioning the long sides of the cardboard and short-side push blocks for positioning the short sides of the cardboard. Correspondingly, the fourth driving elements include long-side driving elements for moving the long-side push blocks and short-side driving elements for moving the short-side push blocks. The long-side driving elements and short-side driving elements cooperate to drive the long-side push blocks and short-side push blocks to move from adjacent or opposite sides of the cardboard towards the center, thereby simultaneously clamping and positioning the long and short sides of the cardboard. The pre-folding push block 43 includes a fifth driving element (elements or assemblies capable of driving linear motion, such as cylinders or telescopic rods) and a bending push block driven by the fifth driving element. The pre-folding mechanism 4 also includes a pressure plate that presses down on the surface of the cardboard during the pre-folding process.

[0027] The cardboard is transported into the pre-folding mechanism 4 by the transfer mechanism 5. The fourth driving component drives the positioning push block to move and position the edge of the cardboard. The positioning suction cup 42 adsorbs and fixes the surface of the cardboard. Then the pressure plate presses down on the cardboard. The fifth driving component drives the bending push block to move and pre-fold the subsequent bending edge of the cardboard. The pre-folding angle is preferably 90 degrees to 135 degrees. After the pre-folding is completed, the bending push block and the pressure plate are reset.

[0028] like Figure 5 As shown, the transfer mechanism 5 includes a first guide rail 51, a first transfer component 52, and a second transfer component 53. The first transfer component 52 is slidably connected to the first guide rail 51, has a lifting function, and is located upstream of the first guide rail 51, used to transfer the cardboard from the detection mechanism 3 to the pre-folding mechanism 4. The second transfer component 53 is slidably connected to the first guide rail 51, has a lifting function, and is located downstream of the first guide rail 51, used to transfer the cardboard from the pre-folding mechanism 4 to the transmission forming section 6.

[0029] like Figure 6As shown, the transmission forming part 6 includes an indexing and transfer assembly 61, which is provided with a first station 62, a second station 63, a third station 64 and a fourth station 65 in sequence according to the production cycle, and also includes an inner mold assembly 66.

[0030] The inner mold assembly 66 is movably mounted on the indexing and transfer assembly 61 to move between workstations. The inner mold assembly 66 is equipped with suction cups that can hold the cardboard and move it to each workstation for processing. The first workstation 62 receives the cardboard transferred by the transfer mechanism 5; the second workstation 63 is equipped with a bending device; the third workstation 64 is equipped with an interlocking mechanism; and the fourth workstation 65 unloads the formed product to the shaping and transfer mechanism 7.

[0031] The bending device includes a pre-bending section, a bending section, and a positioning section.

[0032] The pre-folding section includes the aforementioned pre-folding mechanism 4 and the second pre-folding assembly 632. The pre-folding mechanism 4 folds the edge of the cardboard in a first direction; the second pre-folding assembly 632 folds the edge of the cardboard in a second direction, where the first and second directions intersect.

[0033] like Figure 7 As shown, the bending section is located downstream of the pre-folding section. The bending section includes a roller folding assembly 634, which includes a first roller 6341 and a second roller 6342 with a preset spacing. The roller folding assembly 634 is connected to a drive mechanism, which drives the roller folding assembly 634 to move relative to the cardboard, sequentially bending the two folded edges of the cardboard, and / or a flattening assembly 633, which bends a single folded edge. The surfaces of the first roller 6341 and the second roller 6342 are covered with a polyurethane elastic layer to increase friction and prevent scratching the cardboard surface during rolling, while ensuring clear and aesthetically pleasing bending edges.

[0034] In a preferred embodiment, the pre-folding mechanism 4 is used to pre-fold the two interlocking first direction edges, which are then bent using a roller bending assembly 634. The roller bending assembly 634 includes a first roller 6341 and a second roller 6342. The second pre-folding assembly 632 is used to pre-fold the second direction edge, which is then bent using a flattening assembly 633. The second pre-folding assembly 632, the flattening assembly 633, and the roller bending assembly 634 are all located at the same workstation. The second pre-folding assembly 632 includes a sixth driving component (a cylinder, telescopic rod, or other element or assembly capable of driving linear motion) and a pre-folding block driven by the sixth driving component. During bending, supported by the inner mold assembly 66, the flattening assembly 633 first pushes and folds the second direction edge. Then, the first roller 6341 slides and offsets along the second guide rail 631 to roll and bend one side of the first direction edge, while the flattening assembly 633 resets. After reaching its position, the first roller 6341 moves in the opposite direction to reset, while the second roller 6342 rolls and bends the other side of the first direction edge.

[0035] The positioning section, located at the pre-folding section and the bending section, includes suction cups, mechanical grippers, a fixed receiving cavity, and a liftable pressure plate positioned above the receiving cavity. The suction cups include a positioning suction cup 42 and suction cups on the inner mold assembly 66. The positioning suction cup 42 adheres to the surface of the cardboard. The mechanical grippers clamp the edges of the cardboard; the fixed receiving cavity and the liftable pressure plate positioned above the receiving cavity press down on the cardboard, causing the edges of the cardboard to fold upwards along the side wall of the receiving cavity. The bending section folds the cardboard using the edge of the pressure plate as a bending reference line.

[0036] like Figure 8 As shown, the interlocking mechanism is used to connect two opposite bent edges of the folded cardboard, one bent edge having a protruding insertion portion and the other bent edge having an insertion seam. It includes a third guide rail 641 and a modular assembly 642 slidably connected to the third guide rail 641. The modular assembly 642 drives the bent edge with the insertion portion to open relative to the insertion seam and generate deformation displacement, and drives the bent edge to reset and move, so that the insertion portion is inserted into the insertion seam.

[0037] In a preferred embodiment, the combined molding assembly 642 includes a seventh driving component (a cylinder, telescopic rod, or other element or assembly capable of driving linear motion) and a mounting plate that is driven to rise and fall by the seventh driving component. The mounting plate is equipped with a suction cup and a gripper cylinder. The seventh driving component drives the mounting plate to descend, causing the suction cup to adhere to the surface of the bent edge. Subsequently, the gripper cylinder actuates to drive the bent edge with the insertion part to be misaligned relative to the bent edge with the insertion seam and open up. The opening distance is greater than the length of the insertion part. Then, the reverse drive resets the assembly, causing the insertion part to insert into the insertion seam, thus completing the interlocking molding.

[0038] like Figure 9 As shown, the fourth station 65 is equipped with a fourth guide rail 651 and a lifting and lowering assembly 652 slidably connected to the fourth guide rail 651. The lifting and lowering assembly 652 also integrates a product qualification detection function, which can be realized by a sensor (such as a photoelectric sensor or a vision camera) set on the lifting and lowering assembly. The lifting and lowering assembly 652 has a second defective product box 6521 on one side of the material output station. The lifting and lowering assembly 652 moves qualified products to the shaping and conveying mechanism 7 and transfers the detected defective products to the second defective product box 6521.

[0039] In this embodiment, the transmission forming unit 6 adopts an indexing turntable structure, specifically using a cam divider as the drive source. Specifically, the indexing and transfer assembly 61 adopts a turntable structure driven by a cam divider, on which four inner mold assemblies 66 are evenly distributed along the circumference. The indexing and transfer assembly 61 performs intermittent rotational motion under the drive of the cam divider, thereby driving the four inner mold assemblies 66 to rotate sequentially through the first station 62, the second station 63, the third station 64, and the fourth station 65, so as to gradually process the cardboard into products at each station.

[0040] In a preferred embodiment, the second transfer assembly 53 includes a first drive member 531 slidably connected to the first guide rail 51. The output end of the first drive member 531 is connected to a second drive member 532, and the output end of the second drive member 532 is connected to a suction part 533 for picking up cardboard. The suction part 533 includes two parallel rows of suction nozzles, namely suction nozzle row one 5331 and suction nozzle row two 5332. The distance between suction nozzle row one 5331 and suction nozzle row two 5332 is greater than the width of the inner mold assembly 66 perpendicular to the placement direction. During feeding, the first drive member 531 and the second drive member 532 cooperate to extend the suction part 533 into both sides of the inner mold assembly 66, conveying the cardboard to a preset receiving position on the first station 62. Both the first drive member 531 and the second drive member 532 are mechanisms capable of driving linear motion (such as slide rails, cylinders, etc.). During feeding, the first drive member 531 initially remains extended, and then the second drive member 532 extends to push the cardboard into place.

[0041] like Figure 10 As shown, the shaping and conveying mechanism 7 includes a mounting frame 71, on which a shaping section 72 is provided. The shaping section 72 over-folds and shapes the non-interlocking bent edges of the product and conveys the shaped product to the output conveyor line 8. In a preferred embodiment, the shaping section 72 includes an eighth driving member and a shaping block driven by the eighth driving member. The shaping block over-folds and shapes the non-interlocking bent edges of the product. The end face shape of the shaping block matches the final formed shape of the non-interlocking edge of the product. During conveying, the bottom of the shaping section 72 or the shaping station is provided with an openable and closable discharge port. A baffle is provided at the discharge port. During the shaping process, the baffle closes to support the product. After the shaping is completed, the baffle opens, and the shaped product falls into the output conveyor line 8 through the discharge port by its own gravity.

[0042] like Figure 11 As shown, in a preferred embodiment, the output conveyor line 8 is a conveyor belt structure, and a flipping part 81 is provided at the input end of the conveyor belt. The flipping part 81 includes a flipping cylinder and a rotating plate driven by the flipping cylinder. When the product falls from the shaping and conveying mechanism 7 onto the output conveyor line 8, the flipping cylinder drives the rotating plate to rotate, flipping the product from a flat position to a side-standing position by 90 degrees. Of course, the flipping angle can also be adjusted to other angles according to the product packaging requirements, and then the product is output through the conveyor belt.

[0043] As a preferred embodiment, to facilitate the coordination of the product's bending and interlocking parts with each workstation, such as during interlocking, it is necessary to ensure that the specific bending edge with the interlocking seam or insertion part faces a preset direction. Therefore, during the transfer of the cardboard, a rotary cylinder can be integrated into the transfer equipment to drive the cardboard to rotate to the required angle according to the workstation's needs. Furthermore, for bending of non-interlocking edges, a single-sided bending forming method is generally used to avoid the bending edge completely closing and jamming the inner mold assembly 66, thus preventing demolding.

[0044] If the product process requires that the non-interlocking edges must be bent on both sides, the non-interlocking edges can be bent only to a pre-bending angle that does not fit the inner mold assembly 66 in the transmission forming part 6, and the gap between the bent edge and the inner mold assembly 66 can be used to demold smoothly; then, when the product is transferred to the forming and transfer mechanism 7, the forming part 72 applies pressure to the non-interlocking edges to over-bend them, so that they are reset to the closed state that fits the product, thereby achieving double-sided forming while avoiding mold jamming.

[0045] Working principle: First, the cardboard is conveyed by the feeding conveyor 2, and then inspected by the inspection mechanism 3 to determine its quality. Defective products are rejected, while good products are transferred to the pre-folding mechanism 4. The pre-folding mechanism 4 positions and pre-folds the edges of the cardboard to eliminate stress. Then, the second transfer component 53 accurately places the cardboard on the first station 62 of the transmission forming section 6. Next, the indexing transfer component 61 drives the inner mold component 66 to rotate intermittently, and sequentially completes the multi-sided bending at the second station 63 through the bending device. At the third station 64, the interlocking mechanism realizes the interlocking forming of the bent edges. Finally, at the fourth station 65, the finished product is unloaded to the shaping and conveying mechanism 7.

[0046] Finally, the shaping and conveying mechanism 7 performs over-folding shaping on the non-interlocking bent edges of the product. After shaping, the product automatically falls to the output conveyor line 8 through the discharge port. After receiving the product, the output conveyor line 8 uses the flipping part 81 to flip the product from a flat position to a side-standing position by 90 degrees, and then conveys it out via the conveyor belt, thus completing the fully automated production process from cardboard to finished product.

[0047] Example 2

[0048] This embodiment provides another type of automatic cardboard production line, which differs from the first embodiment mainly in the structure of the transmission forming unit 6, in order to adapt to different factory layout requirements.

[0049] In this embodiment, the transmission forming section 6 adopts a linear indexing and transfer assembly 61.

[0050] Specifically, the indexing and transfer assembly 61 includes a linear guide rail slider system and a servo motor drive system. Four carriers are spaced apart on the linear guide rail, and each carrier is equipped with an inner mold assembly 66. The inner mold assembly 66 is also equipped with suction cups for adsorbing and fixing the cardboard.

[0051] When the production line is in operation, the servo motor drives the slider system to move four carriers intermittently along the linear guide rail, passing through the first station 62, the second station 63, the third station 64 and the fourth station 65 in sequence.

[0052] At the first station 62, the robot places the pre-folded cardboard onto a stationary carrier; then the system steps forward, moving the cardboard to the second station 63 for bending; then it steps forward to the third station 64 for interlocking; finally, it steps forward to the fourth station 65 for unloading.

[0053] After the material is unloaded, the empty vehicle returns to the first station 62 below the linear guide rail (through the bottom return line to achieve circulation), or a one-way linear layout is directly adopted, and the vehicle circulates back to the starting point.

[0054] In this embodiment, although the structure of the transmission forming part 6 is changed from a turntable type to a linear type, the core actuators set at each workstation are consistent with those in Embodiment 1, and can still complete high-precision bending and interlocking actions.

[0055] Specifically, at the second station 63, which has a linear layout, a bending device as described in Embodiment 1 is also provided. This bending device includes a pre-folding section, a bending section, and a positioning section. When the carrier transports the cardboard to the second station 63 and locks it in place, the pre-folding section activates, including a second pre-folding component 632 pre-folding the edge of the cardboard in a second direction. The bending section, located downstream of the pre-folding section, includes a roller folding component 634 and a flattening component 633. The roller folding component 634 consists of a first roller 6341 and a second roller 6342 with a preset spacing, and moves relative to the cardboard under the drive of the driving mechanism. At this time, supported by the inner mold component 66, the flattening component 633 first pushes and folds the edge in the second direction. Then, the first roller 6341 slides and deflects along the second guide rail 631, rolling and bending one side in the first direction, while the flattening component 633 resets. After reaching its position, the first roller 6341 moves in the opposite direction to reset, and the second roller 6342 rolls and bends the other side in the first direction. The positioning part adheres to the surface of the cardboard through the positioning suction cup 42 throughout the bending process, ensuring that the cardboard does not shift during linear motion and bending, thus guaranteeing bending accuracy.

[0056] Next, the carrier moves to the third station 64, where the same interlocking mechanism as in Embodiment 1 is installed. This mechanism is used to connect the two opposite bent edges of the bent cardboard. The assembly forming component 642 descends under the drive of the seventh drive unit. The suction cup on the mounting plate first adheres to the surface of the bent edge, and then the gripper cylinder actuates, driving the bent edge with the insertion part to be offset relative to the bent edge with the interlocking seam and open, ensuring the opening distance is greater than the length of the insertion part. Then, the reverse drive resets the assembly, allowing the insertion part to accurately insert into the interlocking seam, completing the interlocking forming. The advantage of this linear layout is that the interlocking mechanism can be mounted on a fixed frame 1 without rotating with the turntable, reducing wiring difficulty and the complexity of air path movement.

[0057] At the fourth station 65, a fourth guide rail 651 and a slidably connected upper and lower material handling assembly 652 are provided, which also integrates product qualification detection function. The upper and lower material handling assembly 652 determines whether the product is qualified through sensors (such as photoelectric sensors or vision cameras), moves qualified products to the shaping and transfer mechanism 7, and moves unqualified products to the second defective product box 6521. In addition, for the double-sided bending requirements of non-interlocking edges, this embodiment also applies the pre-bending demolding and over-bending reset process: in the transmission forming part 6, only the non-interlocking edge is bent to the pre-bending angle that does not fit the inner mold assembly 66, and the demolding is smoothly carried out by utilizing the gap between the bent edge and the inner mold assembly 66; subsequently, when the product is transferred to the shaping and transfer mechanism 7, the shaping part 72 applies pressure to the non-interlocking edge to over-bend it, so that it is reset to the closed state that fits the product.

[0058] Working principle: During operation, the pre-folded cardboard is placed into a carrier on a linear guide by a robotic arm, and the inner mold assembly 66 holds it in place. Driven by a servo motor, the carrier moves intermittently along the linear guide, sequentially moving to each station. The cardboard is bent and formed at the second station 63, interlocked at the third station 64, and finally unloaded at the fourth station 65 by the unloading mechanism to the shaping and conveying mechanism 7. The empty carrier, having completed unloading, automatically returns to its starting position via a return line or circulation path, ready to receive the next batch of cardboard.

[0059] While this linear layout may require a larger footprint, it avoids the centrifugal force caused by turntable rotation, making it suitable for scenarios with extremely high requirements for high-speed operational stability. Similarly, this embodiment also achieves efficient and high-quality envelope production through automated bending, interlocking, and shaping, solving the technical problems of low efficiency and inability to guarantee uniformity in manual operations.

[0060] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A cardboard bending device, characterized in that... ,include: Pre-folded section; A bending section is located downstream of the pre-folding section. The bending section includes a roller folding assembly (634), which includes a first roller (6341) and a second roller (6342) with a preset spacing. The roller folding assembly (634) is connected to a drive mechanism, which drives the roller folding assembly (634) to move relative to the cardboard, thereby bending the two bending edges of the cardboard in sequence, and / or a flattening assembly (633), which bends a single bending edge. The positioning part is provided at the pre-folded part and the bending part.

2. The cardboard bending device according to claim 1, characterized in that, The positioning unit includes: Suction cup, which adheres to the surface of the cardboard; Mechanical grippers that clamp the edges of the cardboard; A fixed receiving cavity and a liftable pressure plate disposed above the receiving cavity. The pressure plate presses down on the cardboard so that the edge of the cardboard folds up along the side wall of the receiving cavity. The bending part folds the cardboard with the edge of the pressure plate as the bending reference line.

3. The cardboard bending device according to claim 1, characterized in that, The pre-folded portion includes: Pre-folding mechanism (4), which bends the edge of the cardboard in the first direction; The second pre-folding component (632) bends the edge of the cardboard in a second direction, where the first direction intersects the second direction.

4. A cardboard interlocking mechanism for connecting two opposite bent edges of a folded cardboard, wherein one bent edge has a protruding insertion portion and the other bent edge has an insertion seam, characterized in that: The assembly includes a molding component (642), which drives a bent edge having the insertion portion to open relative to the joint and generate a deformation displacement, and drives the bent edge to move back to its original position so that the insertion portion is inserted into the joint.

5. An automated production line for cardboard, characterized in that, include: Rack (1); The feeding conveyor mechanism (2) is mounted on the frame (1); The detection mechanism (3) is located downstream of the feeding and conveying mechanism (2); A pre-folding mechanism (4) is located downstream of the detection mechanism (3); The transfer mechanism (5) is disposed between the detection mechanism (3), the pre-folding mechanism (4) and the transmission forming part (6); The transmission forming part (6) is disposed downstream of the pre-folding mechanism (4); The shaping and transmission mechanism (7) is located downstream of the transmission forming part (6); The output conveyor line (8) is located downstream of the shaping and conveying mechanism (7).

6. An automated production line for cardboard according to claim 5, characterized in that: The testing organization (3) includes: Detection device (31); A defective product removal mechanism (32) is provided on one side of the detection device (31); The first defective product box (33) is located at the output end of the defective product removal mechanism (32).

7. An automated production line for cardboard according to claim 5, characterized in that, The pre-folding mechanism (4) includes: The positioning mechanism (41) is located at a predetermined position edge surrounding the cardboard; A positioning suction cup (42) is set at the center of a preset position on the cardboard; A pre-folding push block (43) is disposed on the side of the positioning suction cup (42).

8. An automated production line for cardboard according to claim 5, characterized in that, The transfer mechanism (5) includes: First guide rail (51); The first transfer component (52) is slidably connected to the first guide rail (51) and is located upstream of the first guide rail (51); The second transfer component (53) is slidably connected to the first guide rail (51) and located downstream of the first guide rail (51).

9. An automated production line for cardboard according to claim 5, characterized in that, The transmission forming part (6) includes: Indexing and transfer assembly (61), wherein the indexing and transfer assembly (61) is provided with a first station (62), a second station (63), a third station (64) and a fourth station (65) in sequence according to the production cycle. The inner mold assembly (66) is movably mounted on the indexing and transfer assembly (61) to move between stations, and the inner mold assembly (66) is provided with a suction cup; The first station (62) receives the cardboard transferred by the transfer mechanism (5); the second station (63) is equipped with a bending device; the third station (64) is equipped with a plug-in interlocking mechanism; and the fourth station (65) unloads the formed product to the shaping and conveying mechanism (7).

10. An automated production line for cardboard according to claim 5, characterized in that: The shaping and conveying mechanism (7) includes a mounting frame (71) on which a shaping part (72) is provided. The shaping part (72) shapes the non-interlocking bent edge of the product and conveys the shaped product to the output conveying line (8).

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