Automatic bagging machine

Abstract

An automatic bagging machine includes a conveyor belt, a filling mechanism, and a sealing mechanism. The sealing mechanism includes a lower insert plate, an upper insert plate, a suction nozzle, and a pressure plate. During sealing, the upper insert plate pushes the bag's tongue upward and tightens it. The suction nozzle, using the lower insert plate as a backing, sucks the tongue from the outside. The lower insert plate pushes down on the material's drawstring at the bag opening for physical separation, completely separating the tongue from the drawstring. Then, the suction nozzle pushes the tongue to the double-sided adhesive for adhesion, and the pressure plate compacts the bag. This invention, through the coordinated operation of "pushing up - sucking up - separating - adhering," completely solves the problem of drawstring clamping when sealing bags with drawstrings, ensuring sealing tightness and performance, while also achieving tight packaging and avoiding loosening during long-term storage.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to an automatic bagging machine. Background Technology

[0002] Bagging packaging equipment is mainly used for packaging materials such as cards, envelopes, and red envelopes. Traditional bagging machines typically complete the sealing process as follows: after the material is placed into the packaging bag, at the sealing station, a brush or scraper is used to attach the flap of the packaging bag to the double-sided adhesive at the bag opening, thus achieving a seal. However, when the material is a foldable tote bag with a drawstring, the existing sealing method faces a series of technical challenges that urgently need to be addressed.

[0003] Currently, there are two main feeding directions for mechanical packaging of shopping bags. If a lateral packaging method is used, where the drawstring is on the side of the bag rather than the opening, the localized protrusions formed by the drawstring ends severely interfere with filling positioning. The filling mechanism often fails to accurately identify the bag opening position due to the presence of the drawstring, leading to filling failure or incomplete filling. To solve this problem, companies usually have to use larger outer packaging bags or invest more in improving the positioning accuracy of the filling mechanism, which undoubtedly significantly increases the overall packaging cost.

[0004] If a vertical packaging method is used, where the drawstring is located on one side of the bag opening or bottom, while avoiding the side positioning problem, a new sealing defect is introduced. In actual production, to ensure flatness and avoid fluffing, tote bags are usually stacked in an alternating manner. This results in some tote bags having their drawstrings located precisely on the bag opening side. Using traditional methods, when the bag's flap is pushed upwards and tightened before sealing, the drawstring on the bag opening side is simultaneously pulled upwards. When the brush or scraper performs the sealing action subsequently, the bag flap uncontrollably rolls the exposed drawstring into the double-sided tape seal and presses it in place. This not only causes the drawstring to be caught in the seal, compromising the seal's tightness and aesthetics, but also leads to packaging seal failure, making the product susceptible to moisture or contamination during storage and transportation.

[0005] Furthermore, the finished tote bag packaging exhibits poor durability during long-term storage. When stacked tote bags are subjected to continuous pressure, their fluffiness gradually decreases, and their overall thickness reduces. This creates excess space inside the originally compact packaging, causing it to loosen from its initial compact state. This not only affects the product's appearance but also compromises its stability during long-term storage and transportation.

[0006] In summary, existing technologies cannot simultaneously solve problems such as positioning interference, sealing rope clamping, and post-packaging loosening of tote bags in mechanical packaging while controlling packaging costs. There is an urgent need for a packaging method and device that can adapt to the structural characteristics of tote bags. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic bagging machine that effectively prevents the rope from extending out and being caught in the seal during the sealing process, solves the problem of rope clamping in the sealing of bags with ropes, and ensures the tightness of the seal.

[0008] The technical solution adopted by this invention to solve its technical problem is: an automatic bagging machine, comprising: Conveyor belts are used for transporting packaging bags. A loading mechanism, located on one side of the conveyor belt, is used to add materials into packaging bags; A sealing mechanism is located on one side of the conveyor belt and downstream of the loading mechanism, and is used to seal the packaging bag. The sealing mechanism includes: The lower insert plate is designed to move up and down, and is used to push the material with the drawstring at the opening of the packaging bag downwards and to act as a backing for the suction nozzle to hold the tongue of the packaging bag in place. The upper insert plate is located outside the lower insert plate. The lower insert plate is designed to move up and down to push and pull the folded-up packaging bag tongue upwards before it is sucked up by the suction nozzle. The suction nozzle, located above the upper insert plate, is designed to move back and forth. It is used to suck up the folded-up tongue of the packaging bag from the outside and push it to the double-sided adhesive at the bag opening for adhesion. The bag-pressing plate is designed to move up and down to press and compact the packaging bag during sealing.

[0009] Preferably, the system also includes a bag feeding mechanism, a bag supporting mechanism, and a material distributing platform. The bag feeding mechanism is located at the input end of the conveyor belt, the bag supporting mechanism is located between the conveyor belt and the loading mechanism, and the material distributing platform is located at the output end of the conveyor belt.

[0010] Preferably, the conveyor belt is provided with adsorption holes, and an adsorption seat is provided on the inner side of the conveyor belt. The adsorption seat has an adsorption port that communicates with its inner cavity. A negative pressure machine is connected to the inner cavity of the adsorption seat. The adsorption holes can be aligned with the adsorption port when the conveyor belt moves.

[0011] Preferably, the sealing mechanism further includes a sealing frame, an upper movable seat, a lower movable seat, a first guide member, a first driving member, and a second driving member. The first guide member is disposed on both sides of the sealing frame. The upper movable seat and the lower movable seat are vertically and flexibly disposed on the sealing frame via the first guide member. The first driving member and the second driving member are both disposed on the sealing frame and drive the upper movable seat and the lower movable seat to move up and down on the first guide member, respectively. The upper insert plate is disposed on the lower movable seat.

[0012] Preferably, the sealing mechanism further includes a sealing plate, a second guide member, and a third driving member. The sealing plate is mounted on the upper movable seat via the second guide member, the third driving member is mounted on the upper movable seat and drives the sealing plate to move, and the suction nozzle is mounted on the sealing plate.

[0013] Preferably, the number of the suction nozzles is at least two, and the axes of the at least two suction nozzles form an angle of 20° to 30° with the upper surface of the packaging bag.

[0014] Preferably, the suction nozzle includes: A sleeve is provided on the suction nozzle; A straw is slidably disposed inside the sleeve, with a limiting block at the rear end of the straw and a suction cup at the front end of the straw; A front locking block is disposed at the front end of the straw; an elastic element is sleeved on the straw and located between the front locking block and the sleeve.

[0015] Preferably, the sealing plate has a mounting plate on its front side, and the mounting plate has an adjustment hole extending in the vertical direction, and the sleeve is disposed in the adjustment hole.

[0016] Preferably, the sealing mechanism further includes a third guide, an upper moving seat, and a fourth driving member. The third guide is disposed on the sealing frame, the upper moving seat is horizontally movable on the third guide, the fourth driving member is disposed on the upper moving seat, the lower insert plate is connected to the fourth driving member, and the fourth driving member drives the lower insert plate to move up and down.

[0017] The beneficial effects of this invention are: 1. During the sealing process, the lower insert plate first moves down to push the material rope at the bag opening downwards, physically isolating and restraining the rope. Then, the upper insert plate rises to pull the bag tongue upwards. After that, the suction nozzle uses the lower insert plate as a backing to adhere to the surface of the tongue, completely separating the tongue from the rope that is pressed down below. This "isolate first, then suction" sequence ensures that when the double-sided tape is applied to the tongue, the exposed rope is completely isolated. This fundamentally solves the defect of rope clamping in traditional sealing methods, ensuring the tightness, aesthetics, and sealing performance of the seal, and protecting the product from moisture and contamination during storage and transportation. 2. By adopting a longitudinal feeding method, the rope is located on one side of the bag opening or bottom, which completely eliminates the interference of the rope end protrusion on the filling positioning in transverse packaging. There is no need to select a larger outer packaging bag or add a high-precision positioning device to accommodate the rope, which significantly reduces the cost of packaging materials and equipment. At the same time, through innovative sealing steps, the inherent defect of the rope being stuck at the sealing point in longitudinal feeding is successfully overcome, realizing stable and reliable longitudinal packaging operations. 3. When sealing, first push the upper insert plate upward to tighten the tongue. After the suction nozzle adsorbs, push the tongue to the double-sided adhesive in a taut state. Combined with the pressure plate pressing down on the packaging bag at the beginning of the sealing process, the finished product is tightly packaged from the start. This active tightening and pasting method effectively counteracts the tendency of the shopping bag to loosen due to the weakening of its fluffiness and the reduction of its thickness under long-term stacking and pressure. It avoids the generation of excess empty space inside the packaging and ensures that the product maintains a tight appearance and stable structural shape throughout the entire warehousing and transportation cycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the sealing station of the present invention; Figure 3 This is a side view of the sealing station of the present invention; Figure 4 This is the present invention. Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the sealing mechanism of the present invention.

[0019] In the diagram: 1. Bag feeding mechanism; 2. Conveyor belt; 21. Adsorption hole; 22. Adsorption seat; 23. Adsorption port; 3. Loading mechanism; 4. Sealing mechanism; 401. Sealing frame; 402. Upper insert plate; 403. Suction nozzle; 404. Lower insert plate; 405. Upper moving seat; 406. Lower moving seat; 407. First guide component; 408. First driving component; 409. Second driving component; 410. Sealing plate; 411. Second guide component; 41 2. Third driving component; 413. Sleeve; 414. Suction tube; 415. Limiting block; 416. Suction cup; 417. Front locking block; 418. Elastic component; 419. Mounting plate; 420. Adjustment hole; 421. Third guide component; 422. Upper moving seat; 423. Fourth driving component; 5. Bag folding plate; 51. Bag folding part; 52. Connecting part; 6. Bag supporting mechanism; 7. Material distribution table; 8. Bag pressing plate; 9. Packaging bag; 91. Tongue part. Detailed Implementation

[0020] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0021] like Figures 1 to 5 The automatic bagging machine shown is particularly suitable for the automatic packaging of materials such as tote bags with drawstrings. The overall structure of the equipment includes: a bag feeding mechanism 1, a conveyor belt 2, a filling mechanism 3, a sealing mechanism 4, a bag folding plate 5, a bag supporting mechanism 6, and a material dispensing table 7.

[0022] The bag feeding mechanism 1 is located at the input end of the conveyor belt 2. It automatically sorts and places the stacked packaging bags 9 one by one onto the conveyor belt 2, realizing the automation of the bag feeding process. The bag supporting mechanism 6 is located between the conveyor belt 2 and the filling mechanism 3. Its function is to extend from both sides of the bag opening before filling and open the bag opening to a predetermined width, providing a smooth channel for the material to be filled smoothly and avoiding filling failure due to the bag opening being closed or insufficient. The sorting platform 7 is located at the output end of the conveyor belt 2. It is used to receive the sealed finished packaging bags, facilitating subsequent collection, quality inspection, or boxing operations, and realizing the orderly separation of finished products from the production line.

[0023] The conveyor belt 2 serves as the carrier and transport medium for the packaging bag 9, and its upper surface is provided with multiple evenly distributed adsorption holes 21. Adsorption seats 22 are located on the inner side of the conveyor belt 2, corresponding to the filling and sealing areas. Adsorption seats 22 have adsorption ports 23 that connect to their inner cavity, and a negative pressure machine is connected to the inner cavity of the adsorption seat 22. When the conveyor belt 2 rotates, the adsorption holes 21 move with the belt surface and sequentially align with the adsorption ports 23. The negative pressure generated by the negative pressure machine is transmitted through the inner cavity of the adsorption seat 22 and the adsorption ports 23 to the adsorption holes 21, thereby firmly adsorbing the packaging bag 9 onto the surface of the conveyor belt 2. This adsorption and transport method ensures that the packaging bag 9 remains stable and does not shift during transport, providing a positioning reference for precise operations at subsequent workstations.

[0024] The folding plate 5 is located on one side of the conveyor belt 2, between the filling mechanism 3 and the sealing mechanism 4. Its main functions are twofold: first, to guide and constrain the tongue 91 of the packaged bag 9 after filling, preventing it from sagging or dragging during transport due to excessive length, and from getting caught in the running mechanism of the conveyor belt 2 or other equipment on the side of the conveyor belt, causing jamming, damage, or safety hazards; second, by bending the tongue 91 upwards to a uniform and standardized posture, it provides a standardized and predictable initial state for the pushing and tightening of the upper insert plate 402 and the suction operation of the nozzle 403 in the subsequent sealing process, reducing the difficulty of controlling subsequent actions and improving the sealing success rate. The folding plate 5 includes a folding part 51 extending from the upper side of the conveyor belt 2, and a connecting part 52 located on the side of the folding part 51 near the filling mechanism 3, connecting the conveyor belt 2 and the top of the folding part 51. The connecting part 52 adopts a smooth transition guide surface design. When the packaging bag 9 moves forward with the conveyor belt 2, its tongue 91 first contacts the connecting part 52, and is smoothly and gradually lifted along its curved surface, finally naturally transitioning to the top of the folding part 51 to complete the upward bend. This smooth guiding method effectively avoids damage such as jamming, breakage or wrinkling of the tongue 91 during the bending process, ensuring the integrity and flatness of the tongue 91.

[0025] The sealing mechanism 4 is the core improvement of this invention. Located downstream of the folding bag plate 5, it is responsible for performing the entire sealing operation. The sealing mechanism 4 mainly includes a sealing frame 401, an upper insert plate 402, a suction nozzle 403, a lower insert plate 404, a bag pressing plate 8, and upper moving seats 405, lower moving seats 406, a first guide member 407, a first driving member 408, a second driving member 409, a sealing plate 410, a second guide member 411, a third driving member 412, a third guide member 421, an upper moving seat 422, and a fourth driving member 423 for driving each component to achieve the prescribed actions. The sealing frame 401 serves as the supporting skeleton of the entire sealing mechanism 4, providing a stable mounting base for the other moving components.

[0026] The first guide member 407 is disposed on both sides of the sealing frame 401, serving as a guide and bearing element to ensure the movement accuracy and stability of the upper moving seat 405 and the lower moving seat 406 during lifting. The upper moving seat 405 and the lower moving seat 406 are flexibly mounted on the sealing frame 401 via the first guide member 407. The first driving member 408 and the second driving member 409 are respectively fixed on the sealing frame 401, driving the upper moving seat 405 and the lower moving seat 406 to lift independently. The upper insert plate 402 is mounted on the lower moving seat 406 and moves up and down synchronously with the lower moving seat 406. Its function is to push and tighten the tongue 91 from the inside of the packaging bag 9 during sealing. The sealing plate 410 is mounted on the upper movable seat 405 via the second guide member 411, which provides horizontal guidance for the forward and backward movement of the sealing plate 410. The third drive member 412 is fixed to the upper movable seat 405 and drives the sealing plate 410 to move along the second guide member 411. The suction nozzle 403 is mounted on the front side of the sealing plate 410 and moves back and forth with the sealing plate 410. The suction nozzle 403 is used to absorb the tongue 91 of the packaging bag 9 from the outside, pull it taut, and push it to the double-sided adhesive to complete the pasting. The lower insert plate 404 is horizontally movable on the sealing frame 401 via the upper movable seat 422 and the third guide member 421. The fourth drive member 423 is mounted on the upper movable seat 422 and drives the lower insert plate 404 to rise and fall. The lower insert plate 404 has a dual function: firstly, it pushes down on the material rope at the opening of the packaging bag 9, physically isolating and restraining it; secondly, when the suction nozzle 403 adsorbs the tongue 91, it acts as a backing for the suction nozzle 403, providing solid reaction force support to ensure the reliability and stability of the adsorption action. The bag pressing plate 8 is independently set and moves up and down, used to press and compact the packaging bag 9 as a whole in the initial stage of sealing.

[0027] The number of suction nozzles 403 is at least two, and the axes of at least two suction nozzles 403 form an angle of 20° to 30° with the upper surface of the packaging bag 9. By setting multiple suction nozzles 403, multi-point adsorption can be formed in the width direction of the tongue 91, increasing the adsorption area and making the force on the tongue 91 more uniform during adsorption and pushing. This avoids local warping or detachment caused by single-point adsorption, and improves the stability and reliability of adsorption. The 20° to 30° angle between the axis of the suction nozzle 403 and the upper surface of the packaging bag 9 is adapted to the natural tilting posture of the tongue 91 after it is tightened by the upper insert plate 402, allowing the suction nozzles 403 to contact the surface of the tongue 91 at a more fitting angle, further improving the adsorption success rate, while reducing damage to the tongue 91 caused by improper adsorption angle.

[0028] Each suction nozzle 403 includes a sleeve 413, a straw 414, a limiting block 415, a suction cup 416, a front locking block 417, and an elastic element 418. The sleeve 413 is disposed on the suction nozzle 403, serving as the mounting and guiding base for the straw 414. The straw 414 is slidably disposed within the sleeve 413, and can extend and retract along the axial direction of the sleeve 413. A limiting block 415 is provided at the rear end of the straw 414, which limits the maximum forward extension stroke of the straw 414 to prevent the straw 414 from dislodging from the sleeve 413. A suction cup 416 is provided at the front end of the straw 414. The suction cup 416 is a trumpet-shaped or bowl-shaped elastic body, used to form a sealed chamber when in contact with the surface of the tongue 91, achieving reliable adsorption through negative pressure. A front locking block 417 is positioned at the front end of the straw 414, and an elastic element 418 is sleeved on the straw 414, located between the front locking block 417 and the sleeve 413. The elastic element 418 is preferably a compression spring, which, in its free state, pushes the straw 414 forward, keeping the suction cup 416 in the extended position. When the nozzle 403 moves forward, the suction cup 416 contacts the tongue 91, and the lower insert plate 404 acts as a backing for adsorption, the elastic element 418 absorbs the impact force during contact, providing a buffer and preventing damage to the tongue 91 or the lower insert plate 404 due to rigid contact. Simultaneously, the elastic pre-pressure provided by the elastic element 418 ensures that the suction cup 416 fits tightly against the surface of the tongue 91, guaranteeing the sealing and reliability of the adsorption. After adsorption, the straw 414 can retract appropriately within the sleeve 413 to compensate for displacement changes during the pushing and pasting process, ensuring that the tongue 91 can be smoothly and flexibly pushed to the double-sided adhesive.

[0029] A mounting plate 419 is provided on the front side of the sealing plate 410. An adjustment hole 420 extending vertically is provided on the mounting plate 419, and a sleeve 413 is disposed within the adjustment hole 420. The adjustment hole 420 is elongated. By loosening and locking the sleeve 413 in its fixed position within the adjustment hole 420, the installation height of the suction nozzle 403 can be adjusted vertically. This height adjustment function allows the suction nozzle 403 to adapt to the height position of the tongue 91 of packaging bags of different sizes, or to fine-tune the adsorption point to optimize the adsorption effect, thus improving the versatility and ease of adjustment of the sealing mechanism 4.

[0030] The specific working process and sealing steps of this embodiment are as follows: Before packaging begins, the bag supply mechanism 1 automatically sorts and places the stacked packaging bags 9 one by one into the input end of the conveyor belt 2. When the conveyor belt 2 is running, the negative pressure generated by the negative pressure machine inside it is transmitted to the adsorption hole 21 through the adsorption seat 22 and the adsorption port 23, firmly adsorbing the packaging bags 9 onto the surface of the conveyor belt 2 and conveying them forward smoothly. This adsorption conveying method effectively prevents the packaging bags 9 from shifting and deviating during the conveying process, providing a reliable guarantee for subsequent filling and positioning.

[0031] When the packaging bag 9 arrives at the filling station, the bag-opening mechanism 6 extends from both sides of the bag opening and expands outwards, widening the bag opening to a predetermined width and height, providing an unobstructed passage for material loading. The filling mechanism 3 accurately loads the material from the drawstring tote bag into the packaging bag 9 longitudinally, with the drawstring of the tote bag located at the bag opening or bottom. This longitudinal feeding method eliminates the interference of the drawstring end protrusion on the filling positioning problem during transverse packaging. The filling mechanism does not need to perform complex avoidance or identification due to the presence of the drawstring, nor does it need to use a larger outer packaging bag to accommodate the protrusion, significantly reducing packaging material costs and equipment positioning accuracy requirements.

[0032] After the material is loaded, the conveyor belt 2 continues to transport the packaging bag 9 containing the material forward. When passing the folding plate 5, the drooping or dragging tongue 91 of the packaging bag 9 first contacts the starting end of the connecting part 52. As the conveyor belt 2 continues to advance, the tongue 91 is gradually guided and lifted along the smooth curved surface of the connecting part 52, so that it is separated from the surface of the conveyor belt and the gap of the side equipment, so as to avoid being caught in the running mechanism due to excessive length. The tongue 91 finally naturally transitions to the top of the folding part 51, completes the upward bend, and forms a uniform and standardized sealing preparation posture, providing standardized initial conditions for the subsequent sealing process.

[0033] After the tongue 91 of the packaging bag 9 is bent, it continues to be conveyed forward by the conveyor belt 2 to the sealing station, where the sealing mechanism 4 begins to perform the sealing action. The following is a detailed description of each step: 1. After the packaging bag 9 reaches the sealing station, the pressing plate 8 first moves downward to apply uniform pressure to the packaging bag 9 and the material inside. The function of this action is to compact the material, expel excess air from the bag, and make the bag's outline regular and its interior tight. The compacted packaging bag 9 not only has a crisp appearance, but more importantly, it provides a stable support base for the subsequent tightening and pasting of the tongue 91, avoiding problems such as inadequate tightening of the tongue or rebound after pasting due to loose material.

[0034] 2. The fourth driving component 423 drives the lower insert plate 404 to move downwards. The end of the lower insert plate 404 precisely pushes down on the material rope located at the opening of the packaging bag 9. The core function of this step is to establish a reliable physical barrier between the tongue 91 and the double-sided adhesive at the bag opening. Since the rope of the tote bag is easily loosened and exposed in the bag opening area during stacking and filling, if it is not restrained, it is very easy to pull the rope up when tightening the tongue later. The lower insert plate 404 forcibly presses down and restrains the loose exposed rope below the sealing area, realizing the pre-separation of the rope from the tongue 91 in terms of physical space, creating an interference-free working environment for the subsequent adsorption and pasting processes.

[0035] 3. The second driving component 409 drives the lower moving seat 406 to rise smoothly along the first guide component 407, thereby driving the upper insert plate 402 to move upward. The upper insert plate 402 pushes the tongue 91, which has been bent upward by the folding plate 5, further upward from the inside of the packaging bag 9, so that it is in a fully tightened and flat state. The full tightening of the tongue 91 is crucial to the final sealing quality: on the one hand, the surface of the tightened tongue 91 is flat and wrinkle-free, which makes it easy for the suction nozzle 403 to adhere firmly; on the other hand, the tongue stuck in the tightened state can make the seal tighter, effectively dealing with the risk of loosening caused by the reduction of material bulkiness during long-term storage. Even if the strap on the bag opening side is slightly lifted in this step, the subsequent suction of the suction nozzle 403 and the isolation effect of the lower insert plate 404 will achieve complete separation of the strap from the tongue 91.

[0036] 4. The third driving component 412 drives the sealing plate 410 to extend horizontally forward along the second guide component 411, causing the suction nozzle 403 to extend to the outer surface of the tongue 91. The suction nozzle 403 uses the lower insert plate 404 as a solid backing to firmly adhere to the surface of the already tightened packaging bag 9 tongue 91 from the outside. In this step, the lower insert plate 404 acts as a backing, providing a counterforce support for the suction force of the suction nozzle 403, enabling the suction nozzle 403 to establish a reliable suction connection without pushing the tongue 91 to deform backward. At this time, the tongue 91 is reliably gripped from the outside by the suction nozzle 403, while the strap is pressed under the bag opening by the lower insert plate 404, achieving complete separation in space and fundamentally eliminating the possibility of the strap being caught in the seal.

[0037] 5. Under the drive of the fourth driving component 423, the lower insert plate 404 moves upward and resets, exiting the bag opening area to make room for the tongue 91 to be pushed and pasted. During this process, since the tongue 91 is always firmly attracted by the suction nozzle 403, its stretched shape and spatial position remain stable and will not spring back or shift due to the removal of the lower insert plate 404.

[0038] 6. The third driving component 412 drives the sealing plate 410 to continue moving forward. The suction nozzle 403 precisely pushes the suctioned packaging bag 9's tongue 91 to the pre-placed double-sided adhesive at the bag opening, ensuring it is taut and flat, and applies appropriate pressure to firmly adhere the tongue 91 to the double-sided adhesive. Compared to the traditional brush or scraper-based sealing method, this method offers advantages such as precise placement and controllable pressure. Furthermore, the cord is completely isolated from the sealing area during the entire sealing process, eliminating the risk of cord getting caught and ensuring the seal's tightness, strength, and aesthetic appearance.

[0039] 7. After the sealing is completed, the suction nozzle 403 releases the tongue 91 of the packaging bag 9, and the third drive component 412 drives the sealing plate 410 and the suction nozzle 403 to move backward and reset; the second drive component 409 drives the lower moving seat 406 and the upper insert plate 402 to move downward and reset; the bag pressing plate 8 moves upward and reset. At this point, the sealing action is completed.

[0040] Finally, the sealed finished packaging bags are conveyed by conveyor belt 2 to the sorting station 7 at the end for automatic output, which is then used by subsequent processes.

[0041] Through the aforementioned structural design and process coordination, this invention organically integrates multiple functions, including bag pre-bending, bag pressing and compaction, rope separation, pushing and tightening, adsorption and separation, and precise pasting, forming a continuous and non-interfering automated operation chain. The various functional links cooperate with each other and are closely linked in sequence, effectively solving three major technical pain points in the packaging of bags with ropes: difficulty in positioning, easy rope clamping during sealing, and easy loosening later. While ensuring packaging quality, it significantly improves the operational stability and overall economic efficiency of the equipment.

Claims

1. An automatic bagging machine, comprising: Conveyor belt (2) for conveying packaging bags (9); The loading mechanism (3) is located on one side of the conveyor belt (2) and is used to add materials into the packaging bag (9). A sealing mechanism (4) is provided on one side of the conveyor belt (2) and located downstream of the loading mechanism (3) for sealing the packaging bag (9); Its features are: The sealing mechanism (4) includes: The lower insert plate (404) is set to move up and down, and is used to push the material with the rope at the opening of the packaging bag (9) downward and to act as a backing for the suction nozzle (403) to suck up the tongue (91) of the packaging bag (9). The upper insert plate (402) is located outside the lower insert plate (404). The upper insert plate (402) is movable up and down and is used to push and pull the tongue (91) of the folded packaging bag (9) upward before it is sucked by the suction nozzle (403). The suction nozzle (403) is located above the upper insert plate (402). The suction nozzle (403) is set to move back and forth. It is used to suck up the tongue (91) of the folded-up packaging bag (9) from the outside and push it to the double-sided tape at the opening of the packaging bag (9) for double-sided tape to stick. The bag pressing plate (8) is set to move up and down and is used to press and compact the packaging bag (9) when sealing.

2. The automatic bagging machine according to claim 1, characterized in that: It also includes a bag supply mechanism (1), a bag support mechanism (6) and a material distribution platform (7). The bag supply mechanism (1) is located at the input end of the conveyor belt (2), the bag support mechanism (6) is located between the conveyor belt (2) and the loading mechanism (3), and the material distribution platform (7) is located at the output end of the conveyor belt (2).

3. The automatic bagging machine according to claim 1, characterized in that: The conveyor belt (2) is provided with an adsorption hole (21), and an adsorption seat (22) is provided on the inner side of the conveyor belt (2). An adsorption port (23) communicating with its inner cavity is provided on the adsorption seat (22). A negative pressure machine is connected to the inner cavity of the adsorption seat (22). The adsorption hole (21) can be aligned with the adsorption port (23) when it moves with the conveyor belt (2).

4. The automatic bagging machine according to claim 1, characterized in that: The sealing mechanism (4) further includes a sealing frame (401), an upper moving seat (405), a lower moving seat (406), a first guide (407), a first drive (408), and a second drive (409). The first guide (407) is disposed on both sides of the sealing frame (401). The upper moving seat (405) and the lower moving seat (406) are vertically and vertically disposed on the sealing frame (401) via the first guide (407). The first drive (408) and the second drive (409) are both disposed on the sealing frame (401) and drive the upper moving seat (405) and the lower moving seat (406) to rise and fall on the first guide (407), respectively. The upper insert plate (402) is disposed on the lower moving seat (406).

5. The automatic bagging machine according to claim 4, characterized in that: The sealing mechanism (4) further includes a sealing plate (410), a second guide (411) and a third drive (412). The sealing plate (410) is mounted on the upper moving seat (405) via the second guide (411). The third drive (412) is mounted on the upper moving seat (405) and drives the sealing plate (410) to move. The suction nozzle (403) is mounted on the sealing plate (410).

6. The automatic bagging machine according to claim 1, characterized in that: The number of the suction nozzles (403) is at least two, and the axes of the at least two suction nozzles (403) form an angle of 20° to 30° with the upper surface of the packaging bag (9).

7. The automatic bagging machine according to claim 1, characterized in that: The suction nozzle (403) includes: A sleeve (413) is disposed on the suction nozzle (403); The straw (414) is slidably disposed inside the sleeve (413), and the rear end of the straw (414) is provided with a limiting block (415), and the front end of the straw (414) is provided with a suction cup (416). A front locking block (417) is disposed at the front end of the straw (414); The elastic element (418) is sleeved on the straw (414) and located between the front locking block (417) and the sleeve (413).

8. The automatic bagging machine according to claim 5 or 7, characterized in that: The sealing plate (410) has a mounting plate (419) on its front side. The mounting plate (419) has an adjustment hole (420) extending in the vertical direction. The sleeve (413) is disposed in the adjustment hole (420).

9. The automatic bagging machine according to claim 4, characterized in that: The sealing mechanism (4) further includes a third guide (421), an upper moving seat (422), and a fourth driving member (423). The third guide (421) is disposed on the sealing frame (401). The upper moving seat (422) is horizontally movable on the third guide (421). The fourth driving member (423) is disposed on the upper moving seat (422). The lower insert plate (404) is connected to the fourth driving member (423). The fourth driving member (423) drives the lower insert plate (404) to rise and fall.

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