A packaging box forming apparatus and a method thereof

Abstract

The present application relates to the field of packaging equipment, in particular to a kind of packaging box forming equipment and method thereof, equipment includes preforming mechanism, terminal forming mechanism and guiding mechanism;Preforming mechanism contains fixed seat, moving seat, extrusion setting mechanism, clamping mechanism, driving device and cutting mechanism;Fixed seat is equipped with fixed mechanism, moving seat can be moved relative to fixed seat, extrusion setting mechanism is hinged between fixed seat and moving seat, clamping mechanism is arranged on moving seat, driving device drives moving seat together with extrusion setting mechanism and clamping mechanism to lift, and the stroke of clamping mechanism is greater, cutting mechanism is arranged on clamping mechanism;Terminal forming mechanism has rack and conveying, folding, melting, compacting mechanism;Conveying mechanism contains rotating mechanism and limiting mechanism, folding, melting, compacting mechanism is sequentially arranged along the rotating path of limiting mechanism. By the uplink differential cooperation of extrusion setting mechanism and clamping mechanism, transition zone shaping is completed while middle setting, and shaping station need not be separately arranged.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and more specifically, to a packaging box forming device and method thereof. Background Technology

[0002] Currently, the production process of liquid food packaging typically employs a continuous process flow of tube blank forming, filling, sealing, preforming, cutting, and final forming. Strip packaging material is rolled and longitudinally sealed to form a cylindrical tube blank, which is then laterally sealed at certain intervals along the axial direction of the tube blank by a transverse sealing mechanism, forming multiple initial packaging units that are connected end to end and defined by the transverse sealing boundaries at the top and bottom ends. At this point, the middle part of each initial packaging unit is still roughly cylindrical, with flat horizontal sealing edges at the top and bottom. Due to the change in cross-sectional shape, a wedge-shaped transition area is formed between the tubular middle part and the flat horizontal sealing edges at both ends. The middle cylindrical part needs to be further processed into a brick shape or other polyhedral shape, and the wedge-shaped transition area at both ends is folded and shaped into a flat end face to form a semi-finished packaging box. The middle part of the semi-finished packaging box is a regular parallel polygonal structure. The horizontal sealing edges at both ends are perpendicular to the end faces of the middle main body and extend to both sides, forming four straight folded parts with triangles at the top and bottom. Subsequently, the flat folded parts are pre-folded, melted, and pressed and shaped by the terminal forming mechanism, and the folded parts are tightly attached to the end face or side wall of the middle main body to finally form a regular finished packaging box.

[0003] The transformation of the initial packaging unit from a cylindrical shape to a polyhedral shape typically involves radially extruding the central cylindrical section of the packaging unit from the periphery outwards using multiple sets of pressure plates or forming molds, changing its cross-section from a circle to a square or polygonal shape. The wedge-shaped transition area, due to its fixed transverse sealing edges at both ends, cannot adapt to the deformation of the center and requires folding and shaping to create a flat end face. In existing technologies, after the central cylindrical section is pre-formed by extrusion, the continuous packaging unit is first cut into independent semi-finished packaging boxes. Then, a separate shaping mechanism is added to extrude and shape the wedge-shaped transition areas at both ends. Afterwards, the boxes are conveyed to the final forming mechanism to complete the pre-folding, melting, and pressing of the folded sections. However, this process mode of adding a separate shaping mechanism will not only extend the overall length of the production line, increase equipment investment costs and subsequent maintenance workload, but also increase the flow and transfer path of independent semi-finished products, increasing the risk of positioning deviation. In addition, the existing cutting process and pre-forming process are independent of each other. The cutting operation requires additional secondary positioning of the packaging unit. Positioning errors are easy to accumulate, and quality defects such as cutting deviation and sealing edge damage are very likely to occur, affecting the forming accuracy of the packaging box and the pass rate of the finished product. Summary of the Invention

[0004] The present invention aims to overcome at least one of the defects (deficiencies) of the prior art and provide a packaging box forming equipment and its forming method. It solves the problem that the existing packaging box forming process requires the addition of a separate forming mechanism, which not only extends the overall length of the production line, increases equipment investment costs and subsequent maintenance workload, but also increases the flow path of independent semi-finished products and increases the risk of positioning deviation. At the same time, the existing cutting process and pre-forming process are independent of each other. The cutting operation requires secondary positioning of the packaging unit, and the positioning error is easy to accumulate, which can easily lead to quality defects such as cutting deviation and sealing edge damage.

[0005] The technical solution adopted by this invention is a packaging box forming equipment, including a pre-forming mechanism and a final forming mechanism, wherein a guiding mechanism is provided between the pre-forming mechanism and the final forming mechanism; the pre-forming mechanism includes a fixed base, a movable base, an extrusion and shaping mechanism, a clamping mechanism, a driving device, and a cutting mechanism; the fixed base is fixedly disposed, and a fixing mechanism is mounted on it; the movable base is disposed below the fixed base and can move up and down relative to the fixed base; the extrusion and shaping mechanism is hinged between the fixed base and the movable base; the clamping mechanism is disposed on the movable base and located below the extrusion and shaping mechanism; the driving device and the... The movable seat is connected to drive the movable seat, together with the extrusion and shaping mechanism and the clamping mechanism, to move up and down, and the upward stroke of the clamping mechanism is greater than the upward stroke of the extrusion and shaping mechanism; the cutting mechanism is located on the clamping mechanism; the terminal forming mechanism includes a frame and a conveying mechanism, a folding mechanism, a melting mechanism and a pressing mechanism located on the frame; the conveying mechanism includes a rotating mechanism and a limiting mechanism located on the rotating mechanism, and the rotating mechanism can drive the limiting mechanism to rotate; the folding mechanism, the melting mechanism and the pressing mechanism are all located on the rotation path of the limiting mechanism and are arranged sequentially along the rotation direction of the limiting mechanism.

[0006] This solution utilizes the upward movement of the extrusion and shaping mechanism and the differential stroke coordination between the clamping mechanism and the extrusion and shaping mechanism in the preforming mechanism. While extruding and shaping the central, tubular structure, it simultaneously completes the shaping of the wedge-shaped transition area, eliminating the need for an additional independent shaping mechanism. This shortens the overall length of the production line, reduces equipment investment and maintenance costs, and minimizes the number of semi-finished product transfer links, reducing the risk of positioning deviation. The cutting mechanism is integrated into the clamping mechanism, allowing for direct cutting while the clamping mechanism maintains the positioning constraint on the lower sealing edge of the packaging unit. This eliminates the need for secondary positioning of the packaging unit, avoiding the accumulation of positioning errors and reducing problems such as cutting offset and sealing edge damage. The pre-shaped semi-finished packaging box is conveyed to the final forming mechanism by a guiding mechanism. A rotating mechanism drives a limiting mechanism to transfer the semi-finished packaging box, which then sequentially passes through a folding mechanism, a melting mechanism, and a pressing mechanism to complete the shaping. The processes are seamlessly connected, enabling stable and continuous automated forming of the packaging box, improving product forming consistency and production efficiency.

[0007] The extrusion shaping mechanism includes a linkage component, a drive component, and at least one pair of opposing pressure plates that can move closer or further apart. The linkage component is hinged to a fixed base on its upper side and to a movable base on its lower side. The pressure plates are mounted on the linkage component, and the drive component is connected to the pressure plates for driving them to move closer or further apart. By utilizing the hinged swing of the linkage component, the vertical movement of the movable base can be converted into a horizontal swing displacement, thereby forming a differential stroke between the extrusion shaping mechanism and the movable base, achieving folding and shaping of the upper and lower transition structure.

[0008] The linkage assembly includes two oppositely arranged mounting seats and two oppositely arranged mounting blocks. The upper and lower sides of the two mounting seats are hinged to the fixed seat and the movable seat, respectively. The two mounting blocks are linked to the mounting seats so that the mounting seats and mounting blocks move up and down synchronously. There are two pairs of pressure plates, including a pair of first pressure plates and a pair of second pressure plates. The pair of first pressure plates are respectively located on the two mounting seats, and the pair of second pressure plates are respectively located on the two mounting blocks. The mounting seats and mounting blocks can drive the first and second pressure plates to move up and down synchronously, without restricting the horizontal opening and closing movement of the first and second pressure plates. The linkage assembly consists of mounting seats and mounting blocks, which move up and down synchronously and respectively support the first and second pressure plates. It can both follow the hinged structure to complete differential upward movement to achieve folding and shaping of the transition structure, and not restrict the horizontal opening and closing movement of the two pairs of pressure plates, allowing the pressure plates to independently complete horizontal extrusion. By having the two pairs of pressure plates work together to extrude and shape the packaging unit, the force in the middle of the packaging unit is more even, effectively improving the pre-forming quality of the packaging box.

[0009] The clamping mechanism includes a first clamping seat and a second clamping seat that are arranged opposite to each other and can move closer or further apart; the cutting mechanism includes a cutting opening on the first clamping seat and a cutting blade that can be telescopically mounted on the second clamping seat. The cutting opening and the cutting blade are respectively arranged on the first and second clamping seats, allowing the cutting operation to be completed while the first and second clamping seats are clamping the lower transverse sealing edge of the packaging unit, eliminating the need for an additional independent cutting station and secondary positioning mechanism. The telescopic movement of the cutting blade, in conjunction with the cutting opening, achieves precise cutting, ensuring the cutting position remains consistent with the clamping and positioning reference, effectively avoiding positioning errors, reducing defects such as off-center cutting and damage to the sealing edge, and improving cutting accuracy.

[0010] The frame includes two parallel and spaced-apart mounting plates. The rotating mechanism includes a rotating drive element, a rotating plate, and a rotating shaft. The rotating shaft is rotatably mounted on the two mounting plates. The rotating drive element is fixedly mounted on the frame, and its output end is connected to the rotating shaft. The rotating plate is fixedly mounted on the rotating shaft and located between the two mounting plates. The limiting mechanism is located on the rotating plate. The two parallel and spaced-apart mounting plates provide a reliable support foundation for the rotating shaft. The rotating drive element drives the rotating plate and the limiting mechanism to rotate synchronously via the rotating shaft. The rotating plate is located between the two mounting plates, resulting in a compact structure, stable operation, and ensuring the positional stability of the semi-finished product packaging box during its transfer process.

[0011] The rotating plate has a regular polygonal structure, and the rotation axis passes through the centroid of the regular polygon. Multiple limiting mechanisms are provided, each corresponding to one of the sides of the regular polygonal rotating plate. The regular polygonal rotating plate rotates around its centroid, ensuring good rotational balance and smooth operation. The multiple limiting mechanisms are evenly distributed on each side, allowing for the simultaneous operation of multiple semi-finished packaging boxes. The orderly arrangement of workstations facilitates precise alignment of each forming mechanism, improving production stability and efficiency.

[0012] The limiting mechanism includes a first limiting block and a second limiting block. The first limiting block is fixedly mounted on a rotating plate, and the second limiting block is hingedly mounted on the rotating plate. Each side of the rotating plate has an inclined portion corresponding to the position of the second limiting block, allowing the second limiting block to rotate around its hinged position with the rotating plate. The first limiting block is fixedly mounted, and the second limiting block is hinged. The inclined portions on the sides of the rotating plate provide clearance for the rotation of the second limiting block, enabling the second limiting block to rotate around the hinge point to achieve limiting opening and closing, allowing the limiting mechanism to switch between different opening and closing states at different workstations.

[0013] A packaging box forming method is used to form multiple end-to-end packaging units into an independent packaging box; each packaging unit includes a central main box body, a lower transverse sealing edge, and an upper transverse sealing edge, with an upper wedge-shaped transition structure formed between the main box body and the upper transverse sealing edge, and a lower wedge-shaped transition structure formed between the main box body and the lower transverse sealing edge; the forming method includes the following steps: S1. Upper end positioning and fixing: The upper horizontal sealing edge of the packaging unit is fixed by the fixing mechanism of the pre-forming mechanism; S2. Pre-forming and shaping: The clamping mechanism clamps the lower transverse sealing edge of the packaging unit, and the pressure plate of the extrusion shaping mechanism extrudes and shapes the main box body in the middle; the driving device drives the moving seat to move the extrusion shaping mechanism and the clamping mechanism upward differentially in sync. The upward stroke of the clamping mechanism is greater than the upward stroke of the extrusion shaping mechanism. The upper wedge transition structure and the lower wedge transition structure are folded and shaped by extrusion. S3. Cutting and Separation: The cutting mechanism on the clamping mechanism cuts the packaging unit and separates it into a semi-finished packaging box; S4. Terminal Forming: The semi-finished packaging box is fed into the limiting mechanism of the terminal forming mechanism by the guiding mechanism; the rotating mechanism drives the limiting mechanism and the semi-finished packaging box to rotate sequentially to the folding mechanism, the melting mechanism and the pressing mechanism. The folding mechanism, the melting mechanism and the pressing mechanism fold, melt and press the semi-finished packaging box to form the finished packaging box.

[0014] This molding method utilizes the aforementioned molding equipment for automated processing. First, the upper transverse sealing edge of the packaging unit is positioned and fixed. Then, through the differential upward movement of the clamping mechanism and the extrusion and shaping mechanism, the folding and shaping of the upper and lower wedge transition structures are completed simultaneously while the main box body in the middle is being extruded and shaped. This eliminates the need for a separate shaping station in the transition area, simplifies the process, shortens the production line length, reduces equipment costs, and minimizes positioning deviations caused by the flow of semi-finished packaging boxes. The cutting mechanism is set on the clamping mechanism, and the two have the same positioning reference, eliminating the need for secondary positioning of the packaging unit. This effectively avoids the accumulation of positioning errors and reduces defects such as cutting deviation and damage to the sealing edge. After the cut semi-finished packaging box is sent to the terminal molding mechanism, it passes through the folding mechanism, melting mechanism, and pressing mechanism in sequence via the conveying mechanism to complete pre-folding, melting and softening, and pressing and shaping. The processes are seamlessly connected, enabling stable and continuous production of neatly shaped finished packaging boxes.

[0015] The cutting and separation operation in step S3 is carried out while the clamping mechanism holds the lower transverse sealing edge. The clamping positioning reference and the cutting reference are consistent, eliminating the need for secondary positioning of the packaging unit, avoiding the accumulation of errors caused by multiple positioning, and effectively improving the cutting accuracy.

[0016] The rotating mechanism drives the limiting mechanism to rotate intermittently. During the process from when the semi-finished packaging box is loaded into the limiting mechanism until the pressing mechanism performs the pressing operation, the second limiting block retracts relative to the first limiting block. After the pressing operation and before the semi-finished packaging box is loaded, the second limiting block opens at a certain angle relative to the first limiting block. The rotating mechanism drives the limiting mechanism to rotate intermittently, matching the processing sequence of each station. During the semi-finished packaging box processing stage, the second limiting block retracts to constrain the box body, preventing the semi-finished packaging box from shifting and ensuring processing alignment accuracy. After pressing and shaping is completed and before the semi-finished packaging box is loaded, the second limiting block opens, facilitating automatic release of the finished packaging box and loading of the semi-finished packaging box, balancing processing stability and ease of loading and unloading.

[0017] Compared with existing technologies, the advantages of this invention are as follows: Through the upward-moving extrusion and shaping mechanism and the differential stroke between the clamping mechanism and the extrusion and shaping mechanism, the folding and shaping of the upper and lower wedge-shaped transition structures are simultaneously completed while the central main box body is being extruded and shaped. Specifically, the upward movement of the extrusion and shaping mechanism folds and shapes the upper wedge-shaped transition structure, while the differential stroke between the clamping mechanism and the extrusion and shaping mechanism achieves the folding and shaping of the lower wedge-shaped transition structure. This molding equipment and method eliminates the need for an additional independent transition area shaping station, simplifying the process flow, shortening the production line length, reducing equipment investment, maintenance costs, and positioning deviations caused by the flow of semi-finished packaging boxes. The extrusion and shaping mechanism uses a hinged linkage component to support two pairs of pressure plates, which can stably achieve differential upward movement to complete the transition structure shaping, while not restricting the independent horizontal opening and closing of the pressure plates; the coordinated extrusion of the two pairs of pressure plates ensures uniform force distribution in the middle of the packaging unit, improving pre-forming quality. The frame consists of two parallel, spaced mounting plates that provide stable support for the rotating shaft. The regular polygonal rotating plate rotates smoothly with its centroid as the center. Multiple limiting mechanisms are located on each side, allowing for the simultaneous loading of multiple semi-finished packaging boxes. This facilitates precise alignment with various processing mechanisms and enables simultaneous multi-station operation. The limiting mechanism consists of a fixed first limiting block and a hinged, rotatable second limiting block, which, in conjunction with the inclined portion on the rotating plate, achieves opening and closing actions. The opening and closing states can be switched according to the needs of different workstations, balancing processing stability and ease of loading and unloading. The cutting mechanism is mounted on the clamping mechanism. The cutting and separating action is performed while the clamping mechanism holds the lower transverse sealing edge tightly. The clamping reference and the cutting reference are unified, eliminating the need for secondary positioning of the packaging unit, avoiding the accumulation of positioning errors, and reducing defects such as cutting deviation and damage to the sealing edge. During the final forming process, the rotating mechanism drives the limiting mechanism to rotate intermittently, matching the processing sequence of each station. During the semi-finished packaging box processing stage, the second limiting block retracts, working in conjunction with the first limiting block to constrain the box body and prevent displacement, ensuring processing alignment accuracy. After pressing and shaping is completed and before the semi-finished product is loaded, the second limiting block opens, forming a larger opening with the first limiting block, facilitating the release of the finished packaging box and the loading of the semi-finished packaging box. The entire process is seamlessly connected, enabling automated and continuous production of neatly formed, consistently high-quality packaging boxes, effectively improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention.

[0019] Figure 2 This is a structural diagram of the preforming mechanism.

[0020] Figure 3 This is a structural diagram of the preforming mechanism from another angle.

[0021] Figure 4 This is a structural diagram of the fixed base.

[0022] Figure 5 This is a structural diagram of the movable base.

[0023] Figure 6 This is a structural diagram of the linkage components.

[0024] Figure 7 This is a structural diagram showing the linkage component hinged between the first slide rod and the second slide rod.

[0025] Figure 8 This is a structural diagram of the extrusion and shaping mechanism.

[0026] Figure 9 This is a structural diagram of the clamping mechanism.

[0027] Figure 10 This is a structural diagram showing the interaction between the clamping mechanism and the mounting block.

[0028] Figure 11 This is a structural diagram of the cutting mechanism.

[0029] Figure 12 This is a structural diagram of the drive unit.

[0030] Figure 13 This is a structural diagram of the terminal forming mechanism.

[0031] Figure 14 This is a structural diagram of the frame.

[0032] Figure 15 This is a structural diagram of the rotating mechanism.

[0033] Figure 16 This is a structural diagram of the limit mechanism.

[0034] Figure 17 This is a structural diagram of the transmission mechanism.

[0035] Figure 18 This is a side view of the rotating plate and the limiting structure.

[0036] Figure 19 This is a layout diagram of the folding mechanism, melting mechanism, and pressing mechanism.

[0037] Figure 20 This is a structural diagram of the folding mechanism.

[0038] Figure 21 This is a structural diagram of the inner wall of the mounting plate.

[0039] Figure 22 This is a structural diagram of the melting mechanism.

[0040] Figure 23 This is a structural diagram of the clamping mechanism.

[0041] 10. Preforming mechanism; 20. Terminal forming mechanism; 30. Guiding mechanism; 100. Fixed seat; 110. Fixed bracket; 101. First front side plate; 102. First left side plate; 103. First rear side plate; 104. First right side plate; 120. Second slide rod; 200. Movable seat; 210. Movable bracket; 201. Second front side plate; 202. Second left side plate; 203. Second rear side plate; 204. Second right side plate; 220. First slide rod; 130. Guide column; 140. Fixed mechanism; 141. Drive mechanism; 142. First pressing seat; 143. Second pressing seat; 150. Mounting beam; 300. Extrusion shaping mechanism; 310. Drive assembly; 311. First drive assembly. 312. Second drive assembly; 315. First mounting shaft; 316. Second mounting shaft; 317. Drive element; 318. Transmission assembly; 320. Pressure plate; 321. First pressure plate; 322. Second pressure plate; 330. Linkage assembly; 331. Mounting base; 332. Mounting block; 333. Linkage rod; 334. Linkage plate; 335. First hinge seat; 336. Second hinge seat; 337. First through hole; 338. Second through hole; 339. Elongated opening; 340. Guide hole; 400. Clamping mechanism; 410. First clamping seat; 420. Second clamping seat; 413. Clamping structure; 430. Third drive assembly; 440. Linkage assembly; 450. Guide shaft; 500. Drive. Device, 510, drive motor, 520, transmission mechanism, 521, transmission connecting rod, 522, moving beam, 523, first moving block, 524, first connecting block, 525, second moving block, 526, second connecting block, 460, cutting mechanism, 461, cutting opening, 462, cutting blade, 463, fourth drive assembly, 160, frame, 161, mounting plate, 162, cam structure, 163, fixing block, 1611, mounting hole, 164, limiting plate, 600, conveying mechanism, 610, rotating mechanism, 611, rotating drive element, 612, rotating plate, 613, rotating shaft, 6121, inclined part, 620, limiting mechanism, 621, first limiting block, 6211, first vertical Part, 6212, First horizontal part, 622, Second limiting block, 6221, Second vertical part, 6222, Second horizontal part, 6223, Protrusion, 631, Pin, 632, Bearing, 6122, Arc-shaped clearance hole, 700, Folding mechanism, 710, Folding drive element, 720, First folding assembly, 721, First folding block, 722, Upper support ear strip, 730, Second folding assembly, 731, Second folding block, 732, Fisheye bearing, 733, Lower support ear strip, 800, Melting mechanism, 810, Melting generator, 820, Melting head, 900, Pressing mechanism, 910, Pressing drive element, 920, Pressing block, 921, First pressing block, 922, Second pressing block. Detailed Implementation

[0042] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate the following embodiments, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0043] Example 1 like Figure 1 As shown, this embodiment provides a packaging box forming device, including a pre-forming mechanism 10 and a terminal forming mechanism 20. A guide mechanism 30 is provided between the pre-forming mechanism 10 and the terminal forming mechanism 20. The guide mechanism 30 is used to guide the semi-finished packaging box processed by the pre-forming mechanism 10 to the terminal forming mechanism 20.

[0044] like Figure 2 , Figure 3 As shown, the preforming mechanism 10 includes a fixed base 100, a movable base 200, an extrusion and shaping mechanism 300, a clamping mechanism 400, a driving device 500, and a cutting mechanism 600. The fixed base 100 is fixedly installed; the movable base 200 is located below the fixed base 100 and can move up and down relative to the fixed base 100; the extrusion and shaping mechanism 300 is hinged between the fixed base 100 and the movable base 200, and includes a driving assembly 310 and at least one pair of opposing pressure plates 320 that can move closer or further away from each other. The pressure plates 320 are drively connected to the driving assembly 310, and the driving assembly 310 drives the pressure plates 320 to open and close; the clamping mechanism 400 is located on the movable base 200 and below the extrusion and shaping mechanism 300, and includes a first clamping mechanism that is opposite to each other and can move closer or further away from each other. The first clamping seat 410 and the second clamping seat 420 are provided; the driving device 500 is provided on the fixed seat 100 and connected to the movable seat 200, and is used to drive the movable seat 200 together with the extrusion shaping mechanism 300 and the clamping mechanism 400 to move up and down, and the upward stroke of the clamping mechanism 400 is greater than the upward stroke of the extrusion shaping mechanism 300; the cutting mechanism 460 is provided on the clamping mechanism 400 and can move up and down synchronously with the clamping mechanism 400, and includes a cutting opening 461 and a cutting blade 462. The cutting opening 461 is provided on the first clamping seat 410 and the cutting blade 462 is provided on the second clamping seat 420.

[0045] Specifically, such as Figure 4As shown, the fixed base 100 includes a fixed bracket 110 and two second sliding rods 120 arranged parallel to and spaced apart on the fixed bracket 110. The fixed bracket 110 is a rectangular frame structure, enclosed by a first front side plate 101, a first left side plate 102, a first rear side plate 103, and a first right side plate 104. The two second sliding rods 120 are both round rods, symmetrically arranged on the fixed bracket 110, with their ends respectively mounted on the first front side plate 101 and the first rear side plate 103 via bearings, and parallel to the first left side plate 102 and the first right side plate 104. The second sliding rods 120 can rotate around their own axis. The fixed base 100 is provided with a fixing mechanism 140, which includes a drive mechanism 141, a first pressing seat 142, and a second pressing seat 143. Specifically, both the first pressing seat 142 and the second pressing seat 143 are slidably mounted on the two second sliding rods 120, and are connected in a transmission manner; the driving mechanism 141 is fixedly mounted on the first rear side plate 103, and its output end is connected to the first pressing seat 142. The driving mechanism 141 can drive the first pressing seat 142 and the second pressing seat 143 to move closer or further apart, thereby achieving clamping, fixing, and releasing.

[0046] like Figure 5 As shown, the movable seat 200 includes a movable support 210 and two first sliding rods 220 arranged parallel to and spaced apart on the movable support 210. The movable support 210 has the same shape as the fixed support 110, also being a rectangular frame structure, enclosed by a second front side plate 201, a second left side plate 202, a second rear side plate 203, and a second right side plate 204. The two first sliding rods 220 are also round rods, symmetrically arranged on the movable support 210, located directly below the second sliding rod 120, and parallel to the second sliding rod 120. The two ends of the first sliding rods 220 are respectively mounted on the second front side plate 201 and the second rear side plate 203 via bearings. The first sliding rods 220 are rotatable around their own axis.

[0047] like Figure 2 As shown, a guide post 130 is provided between the fixed base 100 and the movable base 200, and the guide post 130 provides guidance for the up and down movement of the movable base 200. The guide post 130 is vertically arranged, the fixed bracket 110 is fixedly connected to the upper end of the guide post 130, and the movable bracket 210 is slidably connected to the guide post 130.

[0048] like Figure 6As shown, the extrusion and shaping mechanism 300 includes a linkage assembly 330, which comprises two opposing mounting seats 331 and two opposing mounting blocks 332. The two mounting seats 331 are arranged in a left-right direction, and linkage rods 333 extending in a front-back direction are respectively provided on their front and rear sides. The mounting blocks 332 are arranged in a front-back direction, and their centers are at the same height as the centers of the mounting seats 331. Linkage plates 334 extending in a left-right direction are respectively provided on the left and right sides of the mounting blocks 332, and the ends of the linkage plates 334 have elongated openings 339. The ends of the linkage rods 333 are embedded in the elongated openings 339 and can move along the elongated openings 339. The two mounting seats 331, the two mounting blocks 332, and the linkage rods 333 and linkage plates 334 form a roughly rectangular frame structure. With the cooperation of the linkage rod 333 and the linkage plate 334, the mounting base 331 and the mounting block 332 can move up and down synchronously without restricting the horizontal movement of the mounting base 331 and the mounting block 332.

[0049] like Figure 7 As shown, the mounting base 331 is located vertically between the first slide rod 220 and the second slide rod 120, and horizontally between the two first slide rods 220. The upper side of the mounting base 331 is hinged to the second slide rod 120 via a first hinge seat 335, with the side of the first hinge seat 335 connected to the second slide rod 120 higher than the side of the first hinge seat 335 connected to the mounting base 331. The lower side of the mounting base 331 is hinged to the first slide rod 220 via a second hinge seat 336, with the side of the second hinge seat 336 connected to the first slide rod 220 lower than the side of the second hinge seat 336 connected to the mounting base 331. When the first slide rod 220 moves upward, the first hinge seat 335 and the second hinge seat 336 swing inward synchronously, causing the two mounting bases 331 to move inward and move closer together synchronously. Preferably, the first hinge seat 335 and the second hinge seat 336 are fixedly connected to the second slide rod 120 and the first slide rod 220, and are hinged to the mounting base 331. When the second slide rod 120 and the first slide rod 220 rotate, they can drive the first hinge seat 335 and the second hinge seat 336 to swing. The mounting base 331 is provided with a horizontal first through hole 337, and the mounting block 332 is provided with a horizontal second through hole 338. The pressure plate 320 is provided on the linkage assembly 330 and can move up and down with the linkage assembly 330.

[0050] like Figure 8As shown, in this embodiment, there are two pairs of pressure plates 320, namely a pair of first pressure plates 321 and a pair of second pressure plates 322; the driving assembly 310 includes a first driving assembly 311 and a second driving assembly 312. The first driving assembly 311 is connected to the first pressure plate 321 via a first mounting shaft 315, and the second driving assembly 312 is connected to the second pressure plate 322 via a second mounting shaft 316. There are two first driving assemblies 311, which are used to control the two first pressure plates 321 respectively. They are disposed on the mounting base 331 and are located on the inner and outer sides of the mounting base 331, respectively, with the first pressure plate 321 located on the inner side of the mounting base 331 (i.e., the right side of the left mounting base and the left side of the right mounting base), and the first driving assembly 311 located on the outer side of the mounting base 331. There are two first through holes 337 on the mounting base 331, and two first mounting shafts 315, which are slidably inserted into the two first through holes 337 respectively. The second drive assembly 312 includes a drive element 317 and a transmission assembly 318. The transmission assembly 318 is located at the output end of the drive element 317, and the second mounting shaft 316 is connected to the transmission assembly 318. In this embodiment, the drive element 317 is a cylinder, and only one is provided, which is mounted on the second front side plate 201 of the movable bracket 210. There are two transmission assemblies 318, which are respectively connected to the second pressure plate 322 through the second mounting shaft 316, and the two transmission assemblies 318 are connected to each other. When the drive element 317 works, it can synchronously drive the two transmission assemblies 318 to drive the two second pressure plates 322 to move. The second pressure plate 322 is located on the inner side of the two mounting blocks 332 (i.e., the rear side of the front mounting block and the front side of the rear mounting block). There are two second through holes 338 on the mounting block 332, and there are two second mounting shafts 316, which are slidably inserted into the two second through holes 338 respectively. When the linkage component 330 moves up and down, it can drive the first pressure plate 321 and the second pressure plate 322 to move up and down synchronously through the first mounting shaft 315 and the second mounting shaft 316, but it will not affect the horizontal movement of the first mounting shaft 315 and the second mounting shaft 316 in the first through hole 337 and the second through hole 338. Therefore, it will not restrict the horizontal opening and closing movement of the first pressure plate 321 and the second pressure plate 322.

[0051] The first pressure plate 321 and the second pressure plate 322 are detachably mounted on the first mounting shaft 315 and the second mounting shaft 316, and are respectively provided with a variety of different specifications and shapes. The first pressure plate 321 and the second pressure plate 322 of each specification and shape have a profile that matches the cross-sectional shape of the target packaging material.

[0052] like Figure 9 , Figure 10As shown, the first clamping seat 410 and the second clamping seat 420 of the clamping mechanism 400 are both slidably mounted on two first sliding rods 220 and located directly below the mounting block 332, with a pre-reserved gap between them. The first clamping seat 410 is mounted on the rear section of the first sliding rod 220, and the second clamping seat 420 is mounted on the front section of the first sliding rod 220. Each of the first clamping seat 410 and the second clamping seat 420 has a clamping structure 413 extending to the opposite side on its opposite side. The clamping structure 413 is a flat block structure. The clamping mechanism 400 also includes a third driving assembly 430 and a connecting rod assembly 440. The third driving assembly 430 is mounted on the second rear side plate 203 of the movable bracket 210, and its output end is connected to the first clamping seat 410, used to drive the first clamping seat 410 to slide along the first sliding rod 220. The connecting rod assembly 440 is disposed between the first clamping seat 410 and the second clamping seat 420. Specifically, there are two connecting rod assemblies 440, respectively located at both ends of the first clamping seat 410 and the second clamping seat 420. The middle portion is hinged to the second left side plate 202 and the second right side plate 204, and the two ends are respectively hinged to the ends of the first clamping seat 410 and the second clamping seat 420. When the third driving assembly 430 drives the first clamping seat 410 to move, the connecting rod assembly 440 synchronously drives the second clamping seat 420 to move towards or away from each other. Both the first clamping seat 410 and the second clamping seat 420 are provided with upwardly extending guide shafts 450; the mounting block 332 has vertical guide holes 340 at positions corresponding to the guide shafts 450, see... Figure 6 The guide hole 340 is a through hole, and the guide shaft 450 passes through the guide hole 340.

[0053] like Figure 11 As shown in the figure, the cutting blade has its second clamping seat concealed in the clamping structure. The cutting opening 461 is an elongated opening located on the clamping structure 413 of the first clamping seat 410. The cutting blade 462 is retractably mounted within the second clamping seat 420. The second clamping seat 420 is also provided with a fourth driving assembly 463, which is connected to the cutting blade 462 and is used to drive the cutting blade 462 to extend or retract into the second clamping seat 420. When extended, it can reach into the cutting opening 461 to cut the packaging material.

[0054] like Figure 12As shown, the driving device 500 includes a drive motor 510 and a transmission mechanism 520. The drive motor 510 is mounted on the fixed base 100, and the transmission mechanism 520 is located at the output end of the drive motor 510 and is connected to the first slide rod 220. When the drive motor 510 is working, it drives the first slide rod 220 and the movable bracket 210 to move up and down through the transmission mechanism 520. Specifically, a horizontal mounting beam 150 is fixedly installed on the fixed bracket 110, and the drive motor 510 is mounted on the mounting beam 150. The transmission mechanism 520 includes a transmission link 521, a movable beam 522, a first movable block 523, and a first connecting block 524, and there are two of each of the movable beam 522, the first movable block 523, and the first connecting block 524. The middle part of the transmission link 521 is connected to the output end of the drive motor 510, and both ends are hinged to two moving beams 522 respectively. The two moving beams 522 are vertically arranged on both sides of the mounting beam 150 and can move horizontally along the mounting beam 150. The drive motor 510 can drive the two moving beams 522 to move closer or further apart through the transmission link 521. Two first moving blocks 523 are fixed on the moving beams 522 respectively, and are located outside the two first sliding rods 220 in the horizontal direction and higher than the first sliding rods 220 in the vertical direction. Two first connecting blocks 524 are respectively connected between the two first moving blocks 523 and the two first sliding rods 220, and are hinged to the first moving blocks 523 and fixedly connected to the first sliding rods 220. When the two moving beams 522 move away from each other, the first connecting block 524 rotates around its hinge point with the first moving block 523, causing the connection point of the first slide rod 220 to move upward, thereby causing the moving seat 200, together with the extrusion and shaping mechanism 300 and the clamping mechanism 400, to move upward. During the upward movement of the first slide rod 220 driven by the swinging of the first connecting block 524, the first connecting block 524 is fixedly connected to the first slide rod 220 and can also synchronously drive the first slide rod 220 to rotate around its own axis, and assist the mounting seat 331 in swinging inward through the second hinge seat 336. As an alternative embodiment, the first connecting block 524 and the first slide rod 220, and the first slide rod 220 and the second hinge seat 336, can also be hinged. In this case, only lifting and lowering drive is achieved, and the first slide rod 220 is no longer driven to rotate.

[0055] A second moving block 525 is also provided on the movable beam 522, and the second moving block 525 is connected to the second slide rod 120 through a second connecting block 526. When the movable beams 522 move away from each other, they synchronously drive the second slide rod 120 to rotate around its own axis. Its structure and principle are similar to those described above, and will not be detailed here. The difference is that the second moving block 525 is slidably disposed on the movable beam 522, and it does not drive the second slide rod 120 to move downward. When pulled, the second moving block 525 slides up and down. This setting can precisely control the swing amplitude of the upper and lower sides of the mounting base 331 by using the synchronous rotation angle of the first slide rod 220 and the second slide rod 120. Compared with the simple adaptive swing mode of the mounting base 331, it can ensure that the swing amplitude of the upper and lower sides of the mounting base 331 is consistent, ensuring that the first through hole 337 and the second through hole 338 always remain in a horizontal state, effectively reducing the wear of the first mounting shaft 315 and the second mounting shaft 316 during the horizontal sliding process in the hole, avoiding the phenomenon of skew and jamming, and improving the smoothness and stability of the opening and closing movement of the pressure plate 320.

[0056] The guiding mechanism 30 is a guiding plate used to guide the pre-formed semi-finished packaging box into the limiting mechanism 620 of the terminal forming mechanism 20.

[0057] like Figure 13 As shown, the terminal forming mechanism 20 includes a frame 160, a conveying mechanism 600, a folding mechanism 700, a melting mechanism 800, and a pressing mechanism 900. The frame 160 provides an installation base; the conveying mechanism 600 includes a rotating mechanism 610 and a limiting mechanism 620. The rotating mechanism 610 is mounted on the frame 160, and the limiting mechanism 620 is mounted on the rotating mechanism 610. The rotating mechanism 610 can drive the limiting mechanism 620 to rotate around a rotating axis 613. The folding mechanism 700, the melting mechanism 800, and the pressing mechanism 900 are all mounted on the frame 160 and located on the rotation path of the limiting mechanism 620; wherein, the melting mechanism 800 is located downstream of the folding mechanism 700, and the pressing mechanism 900 is located downstream of the melting mechanism 800.

[0058] Specifically, such as Figure 14 As shown, the frame 160 includes two parallel and spaced-apart mounting plates 161. The two mounting plates 161 are identical in shape, arranged in a front-to-back direction, and connected and fixed by multiple fixing blocks 163. The mounting plates 161 are generally polygonal in shape, with multiple straight sides, providing a mounting base for the folding mechanism 700, the melting mechanism 800, and the pressing mechanism 900. A through mounting hole 1611 is provided on the lower side of the mounting plate 161 for mounting the rotating mechanism 610.

[0059] like Figure 15As shown, the rotating mechanism 610 includes a rotating drive element 611, a rotating plate 612, and a rotating shaft 613. The rotating drive element 611 is a motor, fixedly mounted on the outer side of the front mounting plate 161. The rotating shaft 613 passes through the mounting hole 1611, and one end is fixedly connected to the output shaft of the rotating drive element 611. The rotating plate 612 is fixedly mounted on the rotating shaft 613 and located between the two mounting plates 161. The limiting mechanism 620 is provided on the rotating plate 612. When the rotating drive element 611 is working, it can drive the rotating plate 612 and the limiting mechanism 620 to rotate through the rotating shaft 613. In this embodiment, there are two rotating plates 612, which are fixedly mounted parallel to each other on the rotating shaft 613, and the whole is located between the two mounting plates 161.

[0060] Preferably, such as Figure 15 As shown, the rotating plate 612 has a regular polygonal structure, and the rotating shaft 613 passes through the centroid of the rotating plate 612. Compared with a circular rotating plate, the regular polygonal rotating plate 612 has multiple straight sides, which makes it easier for the limiting mechanism 620 to be installed and positioned neatly. In this embodiment, the rotating plate 612 has a regular hexagonal structure with six sides; the limiting mechanism 620 is correspondingly set to six, respectively arranged at the center position of the six sides of the rotating plate 612. Figure 19 As shown, the folding mechanism 700, melting mechanism 800, and pressing mechanism 900 are evenly distributed circumferentially around the centroid of the rotating plate 612. The circumferential angle α between the folding mechanism 700 and the melting mechanism 800, and the circumferential angle α1 between the melting mechanism 800 and the pressing mechanism 900 are both 60°. This six-part regularized workstation layout enables the equipment to form a complete six-station cycle: loading station, folding station, melting station, pressing station, unloading station, and waiting station. This allows for synchronous intermittent operation of multiple stations, ensuring smooth process connections, uniform production rhythm, and high stability during continuous operation.

[0061] like Figure 16As shown, the limiting mechanism 620 includes a first limiting block 621 and a second limiting block 622. The first limiting block 621 is fixedly installed on the side of the two rotating plates 612, and the second limiting block 622 is hingedly installed on the side of the two rotating plates 612. Specifically, the first limiting block 621 includes a first vertical portion 6211 and a first horizontal portion 6212. The first vertical portion 6211 is perpendicular to the corresponding side of the rotating plate 612, and the first horizontal portion 6212 is located below the first vertical portion 6211 and perpendicular to the first vertical portion 6211. The bottom of the first horizontal portion 6212 is attached to the corresponding side of the rotating plate 612, and the first horizontal portion 6212 extends toward the second limiting block 622. A mounting hole is provided on the first horizontal portion 6212, and the first limiting block 621 is fixedly installed on the side of the rotating plate 612 by bolts.

[0062] like Figure 16 As shown, the second limiting block 622 includes a second vertical portion 6221 and a second horizontal portion 6222. The second vertical portion 6221 is perpendicular to the corresponding side of the rotating plate 612, and the second horizontal portion 6222 is located below the second vertical portion 6221 and is perpendicular to it. The second horizontal portion 6222 extends away from the first limiting block 621; the bottom of the second horizontal portion 6222 is flat and has a gap between it and the side of the rotating plate 612. Figure 15 , Figure 18 As shown, an inclined portion 6121 is provided on the side of the rotating plate 612, and the second horizontal portion 6222 is integrally positioned across the side of the rotating plate 612 and above the inclined portion 6121.

[0063] like Figure 16 , Figure 17 As shown, the bottom of the second horizontal portion 6222 is provided with a protrusion 6223, which is embedded in the gap between the two rotating plates 612 and hinged to the two rotating plates 612. The protrusion 6223 is also provided with a pin 631 extending to both sides. The rotating plate 612 is provided with an arc-shaped clearance hole 6122, and the pin 631 passes through the arc-shaped clearance hole 6122 and extends to both sides. Bearings 632 are respectively provided at both ends of the pin 631. Figure 14 , Figure 18 As shown, cam structures 162 are provided on the inner sidewalls of both mounting plates 161. The cam structures 162 have different diameters at different positions, and the bearing 632 is in close contact with the outer sidewall of the cam structure 162.

[0064] like Figure 18As shown, a clamping space for accommodating semi-finished packaging boxes is formed between the first vertical portion 6211 and the second vertical portion 6221. With different diameters of the bearing 632 and the cam structure 162, the second limiting block 622 can rotate around the hinge. When the second limiting block 622 rotates until the bottom of the second horizontal portion 6222 is in contact with the straight side of the rotating plate 612, the second vertical portion 6221 retracts relative to the first vertical portion 6211, maintaining parallelism and achieving reliable clamping of the semi-finished packaging boxes. When the second limiting block 622 rotates until the bottom of the second horizontal portion 6222 is in contact with the inclined portion 6121, the second vertical portion 6221 opens relative to the first vertical portion 6211, thus adapting to different workstation requirements and facilitating the loading of semi-finished products and the unloading of finished products.

[0065] like Figure 20 , Figure 21 As shown, the folding mechanism 700 is located on the upper side of the frame 160 and includes a folding drive element 710, a first folding assembly 720, and a second folding assembly 730. In this embodiment, the folding drive element 710 is a cylinder, fixedly installed on the upper side of the frame 160. The first folding assembly 720 includes a first folding block 721 and an upper support strip 722. The first folding block 721 is fixedly disposed at the output end of the folding drive element 710, and its movement direction is vertically downward and towards the rotation axis 613. There are two upper support strips 722, which are respectively fixedly installed on the inner sidewalls of the two mounting plates 161 by fasteners. The second folding assembly 730 includes two second folding blocks 731, which are respectively hinged to the outer sidewalls of the two mounting plates 161; one end of the second folding block 731 is connected to the first folding block 721 through a fisheye bearing 732, and the other end extends inward toward the mounting plate 161.

[0066] When the limiting mechanism 620 rotates the semi-finished packaging box to the corresponding station of the folding mechanism 700, the two folded parts at the top of the semi-finished packaging box are respectively positioned above the two upper support strips 722, and are supported and limited by the upper support strips 722. The folding drive element 710 drives the first folding block 721 to move vertically downward, pressing the top of the semi-finished packaging box; under the support and limiting action of the upper support strips 722, the folded parts at the top of the packaging box bend towards the top of the box body, and the upper transverse sealing edge is flatly attached to the upper end face of the box body. At the same time, the first folding block 721 drives the end of the second folding block 731 connected to the fisheye bearing 732 to swing downward through the fisheye bearing 732, so that the end of the second folding block 731 extending into the inner side of the mounting plate 161 swings upward synchronously, thereby bending the two folded parts at the bottom of the semi-finished packaging box upward, and simultaneously folding the lower transverse sealing edge to the lower end face of the box body, realizing the synchronous pre-folding operation of the upper and lower folded parts and sealing edges of the packaging box.

[0067] like Figure 21 as shown, lower lug support strips 733 are further fixedly mounted on the inner side walls of the two mounting plates 161, and the lower lug support strips 733 are closer to the rotating shaft 613 than the corresponding upper lug support strips 722. Both the upper lug support strips 722 and the lower lug support strips 733 are arc-shaped, and at least extend from the folding mechanism 700 to the pressing mechanism 900. The upper lug support strips 722 and the lower lug support strips 733 can support and limit the pre-folded folding portion, preventing the folding portion from springing back to return to a flat state. The cross-sections of the upper lug support strips 722 and the lower lug support strips 733 are preferably circular, which can prevent sharp corners from scratching the folding portion.

[0068] As Figure 21 shown, a limiting plate 164 is further fixedly mounted on the inner side walls of the two mounting plates 161. The limiting plate 164 is arc-shaped, at least extending from the folding mechanism 700 to the pressing mechanism 900, and is used for laterally limiting the semi-finished packaging box carried by the limiting mechanism 620 to prevent the semi-finished packaging box from lateral offset. It should be noted that the upper lug support strips 722, the lower lug support strips 733 and the limiting plate 164 are not arranged in close contact with the inner side walls of the mounting plates 161, and a gap is reserved between them and the inner side walls of the mounting plates 161, so as to ensure that each component realizes the corresponding supporting and limiting functions.

[0069] As Figure 22 shown, the fusing mechanism 800 includes a fusing generator 810 and a plurality of fusing heads 820. The fusing generator 810 is fixedly arranged on one side of the mounting plate 161, and the plurality of fusing heads 820 are all connected to the fusing generator 810. In this embodiment, the cross-section of the fusing heads 820 is triangular, and there are four in total. When the semi-finished packaging box is rotated to the station corresponding to the fusing mechanism 800, the four fusing heads 820 are respectively located between the four folding portions and the main box body, and perform fusing treatment on the abutting portions of the folding portions and the main box body.

[0070] In one embodiment, the fusing head 820 is a high-frequency head, and the fusing generator 810 is a high-frequency generator matched with the high-frequency head, which is suitable for fusing operations of aluminum composite packaging materials. In another embodiment, the fusing head 820 is an ultrasonic head, and the fusing generator 810 is an ultrasonic generator matched with the ultrasonic head, which is suitable for fusing operations of packaging materials not containing aluminum. After the fusing treatment, a bondable molten layer is formed in the abutting area between the folding portion and the main box body, which facilitates the subsequent pressing and shaping by the pressing mechanism 900.

[0071] As Figure 23As shown, the clamping mechanism 900 includes a clamping drive element 910 and clamping blocks 920. The clamping drive element 910 is fixed to the frame 160, and the clamping blocks 920 are fixedly installed at the output end of the clamping drive element 910. In this embodiment, three clamping blocks 920 are provided, including one first clamping block 921 and two second clamping blocks 922; the clamping drive element 910 is a cylinder, with three cylinders configured accordingly, each driving one of the three clamping blocks 920 to move independently. The first clamping block 921 moves towards the rotating shaft 613, and the two second clamping blocks 922 move towards the inner side of the two mounting plates 161. When the semi-finished packaging box after melting is rotated to the station corresponding to the pressing mechanism 900, the first pressing block 921 applies pressure from the top of the box body to tightly press the two folded parts at the top onto the top surface of the main box body, and the second pressing block 922 applies pressure from both sides inward to tightly press the two folded parts at the bottom onto the side wall of the main box body, finally obtaining the formed finished packaging box.

[0072] It should be noted that the upper and lower ends of the box body described in this embodiment are defined with reference to the equipment orientation, rather than based on the structure of the packaging box itself. Specifically, in the pre-forming mechanism 10, the end of the packaging unit closer to the clamping mechanism 400 is the lower end, and the end closer to the fixing mechanism 140 is the upper end. In the terminal forming mechanism 20, after the semi-finished packaging box is inserted into the limiting mechanism 620, the end of the box body facing the first horizontal part 6212 is the lower end, and the end of the box body facing the opening of the limiting mechanism 620 is the upper end. In actual operation, when the semi-finished packaging box is inserted into the limiting mechanism 620, the top of its built-in suction nozzle faces the first horizontal part 6212, and the bottom of the packaging box faces the opening side of the limiting mechanism 620. After the packaging box completes all forming processes of feeding, folding, melting, and pressing, it rotates 240° with the rotating plate 612, causing the bottom of the formed packaging box to face downwards, and finally falls smoothly into the external conveyor belt, completing the discharge conveying. In addition, the fixing mechanism 140 in this embodiment can be a special mechanism for clamping and fixing the upper sealing edge, or it can be used to fix the upper transverse sealing edge by pressing the sealing seat when the packaging material is transversely sealed to form the upper transverse sealing edge. At this time, the formation of the upper transverse sealing edge and the clamping and fixing are carried out simultaneously, which can further reduce secondary positioning.

[0073] Example 2 This embodiment provides a packaging box forming method, which is implemented using the forming equipment in Embodiment 1 above, and is used to form multiple end-to-end packaging units into an independent packaging box.

[0074] Each of the packaging units includes a central main box body, a lower transverse sealing edge, and an upper transverse sealing edge. An upper wedge-shaped transition structure is formed between the main box body and the upper sealing edge, and a lower wedge-shaped transition structure is formed between the main box body and the lower sealing edge.

[0075] The molding method includes the following steps: S1. Upper end positioning and fixing: The upper transverse sealing edge of the packaging unit is fixed by the fixing mechanism 140 of the pre-forming mechanism 10. S2. Pre-forming and shaping: The clamping mechanism 400 clamps the lower transverse sealing edge of the packaging unit, and the pressure plate 320 of the extrusion shaping mechanism 300 extrudes and shapes the middle main box body; the driving device 500 drives the moving seat 200 to move the extrusion shaping mechanism 300 and the clamping mechanism 400 upward differentially in sync. The upward stroke of the clamping mechanism 400 is greater than the upward stroke of the extrusion shaping mechanism 300. The upper wedge transition structure and the lower wedge transition structure are folded and shaped by extrusion.

[0076] In this step, the drive device 500 drives the movable seat 200 to move upward, causing the extrusion and shaping mechanism 300 and the clamping mechanism 400 connected to the movable seat 200 to move upward synchronously. The upper and lower sides of the extrusion and shaping mechanism 300 are hinged to the fixed seat 100 and the movable seat 200, respectively, allowing it to swing horizontally during upward movement. This results in the actual upward stroke of the extrusion and shaping mechanism 300 being less than the upward stroke of the movable seat 200. The clamping mechanism 400 is directly mounted on the first slide bar 220 of the movable seat 200, and its upward stroke is equal to that of the movable seat 200, thus making the upward stroke of the clamping mechanism 400 greater than that of the extrusion and shaping mechanism 300.

[0077] When the extrusion shaping mechanism 300 moves upward, the upper sealing edge of the packaging material is fixed by the fixing mechanism 140, which can extrude and fold the upper wedge transition structure between the upper transverse sealing edge and the middle main box body. At the same time, because the clamping mechanism 400 moves upward differentially relative to the extrusion shaping mechanism 300, the lower transverse sealing edge held by the clamping mechanism 400 moves upward relative to the middle main box body, and the extrusion and folding of the lower wedge transition structure is completed simultaneously. This achieves the folding and shaping of the upper and lower double-sided transition structures in one go while the middle main box body is shaped.

[0078] S3. Cutting and Separation: The cutting mechanism 460 on the clamping mechanism 400 cuts the packaging unit and separates it into a semi-finished packaging box. In this step, the cutting and separation operation is carried out while the clamping mechanism 400 is holding the lower transverse sealing edge, so that the clamping positioning reference and the cutting reference are consistent, and there is no need to perform secondary positioning of the packaging unit.

[0079] Specifically, after the clamping mechanism 400 clamps and fixes the lower transverse sealing edge, it moves upward with the movable seat 200 to compress and fold the wedge-shaped transition structure. During this process, the clamping mechanism 400 maintains the clamping state. After compression shaping and folding, the cutting mechanism 460 cuts and separates the lower sealing edge. It can be understood that the lower sealing edge can also be cut and separated first, followed by compression shaping and differential upward movement.

[0080] S4. Terminal Forming: The semi-finished packaging box is fed into the limiting mechanism 620 of the terminal forming mechanism 20 via the guiding mechanism 30; the rotating mechanism 610 drives the limiting mechanism 620 and the semi-finished packaging box to rotate sequentially to the folding mechanism 700, the melting mechanism 800 and the pressing mechanism 900, where the folding mechanism 700, the melting mechanism 800 and the pressing mechanism 900 fold, melt and press the semi-finished packaging box to form the finished packaging box.

[0081] In this step, the rotating mechanism 610 drives the limiting mechanism 620 to rotate intermittently. The second limiting block 622 of the limiting mechanism 620 rotates around the hinge point according to the workstation requirements, in cooperation with the bearing 632 and the cam structure 162, causing it to retract or open relative to the first limiting block 621. Specifically, after the limiting mechanism 620 is inserted into the semi-finished packaging box, during the pressing operation of the pressing mechanism 900, the second limiting block 622 retracts relative to the first limiting block 621 to constrain the box body, prevent the semi-finished packaging box from shifting, and ensure processing alignment accuracy; after pressing and shaping is completed and before the semi-finished packaging box is inserted, the second limiting block 622 opens relative to the first limiting block 621, giving the limiting mechanism 620 a larger opening, facilitating automatic release of the finished packaging box and insertion of the semi-finished packaging box, thus balancing processing stability and ease of loading and unloading.

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A packaging box forming device, comprising a pre-forming mechanism and a final forming mechanism, wherein a guiding mechanism is provided between the pre-forming mechanism and the final forming mechanism, characterized in that, The preforming mechanism includes a fixed base, a movable base, an extrusion and shaping mechanism, a clamping mechanism, a driving device, and a cutting mechanism. The fixed base is fixedly installed, and the fixing mechanism is mounted on it. The movable base is located below the fixed base and can move up and down relative to the fixed base. The extrusion and shaping mechanism is hinged between the fixed base and the movable base. The clamping mechanism is located on the movable base and below the extrusion and shaping mechanism. The driving device is connected to the movable base and is used to drive the movable base, together with the extrusion and shaping mechanism and the clamping mechanism, to move up and down, and the upward stroke of the clamping mechanism is greater than the upward stroke of the extrusion and shaping mechanism. The cutting mechanism is located on the clamping mechanism. The terminal forming mechanism includes a frame and a conveying mechanism, a folding mechanism, a melting mechanism and a pressing mechanism disposed on the frame; the conveying mechanism includes a rotating mechanism and a limiting mechanism disposed on the rotating mechanism, the rotating mechanism can drive the limiting mechanism to rotate; the folding mechanism, the melting mechanism and the pressing mechanism are all disposed on the rotation path of the limiting mechanism and are arranged sequentially along the rotation direction of the limiting mechanism.

2. The packaging box forming equipment according to claim 1, characterized in that, The extrusion and shaping mechanism includes a linkage component, a drive component, and at least one pair of pressure plates that are arranged opposite each other and can move closer or further apart; the upper side of the linkage component is hinged to a fixed seat and the lower side is hinged to a movable seat; the pressure plates are mounted on the linkage component, and the drive component is connected to the pressure plates for driving the pressure plates to move closer or further apart.

3. The packaging box forming equipment according to claim 2, characterized in that, The linkage assembly includes two oppositely arranged mounting seats and two oppositely arranged mounting blocks; the upper and lower sides of the two mounting seats are respectively hinged to the fixed seat and the movable seat, and the two mounting blocks are linked to the mounting seats so that the mounting seats and mounting blocks move up and down synchronously; there are two pairs of pressure plates, including a pair of first pressure plates and a pair of second pressure plates, the pair of first pressure plates are respectively disposed on the two mounting seats, and the pair of second pressure plates are respectively disposed on the two mounting blocks; the mounting seats and mounting blocks can drive the first pressure plates and second pressure plates to move up and down synchronously, and do not restrict the horizontal opening and closing movement of the first pressure plates and second pressure plates.

4. The packaging box forming equipment according to claim 1, characterized in that, The clamping mechanism includes a first clamping seat and a second clamping seat that are arranged opposite to each other and can move closer or further apart; the cutting mechanism includes a cutting opening on the first clamping seat and a cutting knife that can be telescopically mounted on the second clamping seat.

5. The packaging box forming equipment according to any one of claims 1-4, characterized in that, The frame includes two parallel and spaced-apart mounting plates; the rotating mechanism includes a rotating drive element, a rotating plate and a rotating shaft, the rotating shaft is rotatably mounted on the two mounting plates, the rotating drive element is fixedly mounted on the frame and its output end is connected to the rotating shaft for transmission, the rotating plate is fixedly mounted on the rotating shaft and located between the two mounting plates, and the limiting mechanism is mounted on the rotating plate.

6. The packaging box forming equipment according to claim 5, characterized in that, The rotating plate is a regular polygonal structure, and the rotating axis passes through the centroid of the regular polygon; multiple limiting mechanisms are provided, and the multiple limiting mechanisms are respectively provided on each side of the regular polygonal rotating plate.

7. The packaging box forming equipment according to claim 6, characterized in that, The limiting mechanism includes a first limiting block and a second limiting block. The first limiting block is fixedly installed on the rotating plate, and the second limiting block is hingedly installed on the rotating plate. Each side of the rotating plate is provided with an inclined portion corresponding to the position of the second limiting block, for the second limiting block to rotate around its hinge position with the rotating plate.

8. A method for forming a packaging box, characterized in that, The packaging box forming equipment as described in any one of claims 1-7 is used to form multiple end-to-end packaging units into an independent packaging box; each packaging unit includes a central main box body, a lower transverse sealing edge, and an upper transverse sealing edge, with an upper wedge-shaped transition structure formed between the main box body and the upper transverse sealing edge, and a lower wedge-shaped transition structure formed between the main box body and the lower transverse sealing edge; the forming method includes the following steps: S1. Upper end positioning and fixing: The upper horizontal sealing edge of the packaging unit is fixed by the fixing mechanism of the pre-forming mechanism; S2. Pre-forming and shaping: The clamping mechanism clamps the lower transverse sealing edge of the packaging unit, and the pressure plate of the extrusion shaping mechanism extrudes and shapes the main box body in the middle; the driving device drives the moving seat to move the extrusion shaping mechanism and the clamping mechanism upward differentially in sync. The upward stroke of the clamping mechanism is greater than the upward stroke of the extrusion shaping mechanism. The upper wedge transition structure and the lower wedge transition structure are folded and shaped by extrusion. S3. Cutting and Separation: The cutting mechanism on the clamping mechanism cuts the packaging unit and separates it into a semi-finished packaging box; S4. Terminal Forming: The semi-finished packaging box is fed into the limiting mechanism of the terminal forming mechanism by the guiding mechanism; the rotating mechanism drives the limiting mechanism and the semi-finished packaging box to rotate sequentially to the folding mechanism, the melting mechanism and the pressing mechanism. The folding mechanism, the melting mechanism and the pressing mechanism fold, melt and press the semi-finished packaging box to form the finished packaging box.

9. The packaging box forming method according to claim 8, characterized in that, The cutting and separating operation in step S3 is carried out while the clamping mechanism holds the lower transverse sealing edge.

10. The packaging box forming method according to claim 8, characterized in that, The rotating mechanism drives the limiting mechanism to rotate intermittently; after the limiting mechanism is inserted into the semi-finished product packaging box, during the pressing operation of the pressing mechanism, the second limiting block retracts relative to the first limiting block; after the pressing operation and before the semi-finished product packaging box is inserted, the second limiting block opens relative to the first limiting block.

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