Paper bag sealing device

Abstract

The utility model provides a paper bag sealing device, which relates to a paper bag packaging technology and comprises a conveying structure with a moving direction, a sealing structure and a sealing structure, and is characterized in that the conveying structure is used for driving paper bags to move along the moving direction; the closing-in structure, the labeling structure, the first pressing structure and the second pressing structure are arranged in the first direction of the conveying structure and are sequentially arranged in the moving direction, the closing-in structure is used for pushing a set of opposite side faces at the upper end of a paper bag to move oppositely in the second direction and form a convex tip, and the labeling structure is used for pasting a label part to the convex tip; the first pressing structure is used for bending the upper part of the spur into a right angle, and the second pressing structure is used for pressing the upper part of the spur on the lower part of the spur and adhering the upper part of the spur to the lower part of the spur through a label; the moving direction, the first direction and the second direction are perpendicular to one another, the conveying structure is used for driving paper bags to sequentially pass through the closing-in structure, the labeling structure, the first pressing structure and the second pressing structure to complete sealing, manual intervention is not needed, automatic sealing is achieved, and the sealing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a paper bag packaging technology, in particular to a paper bag sealing device. Background Art

[0002] Paper bags are a common packaging container, typically rectangular in shape with an open top for food. Sealing paper bags is typically done manually, which is inefficient and difficult to automate, while also hindering hygiene and safety.

[0003] To this end, this application provides a paper bag sealing device that solves the problem of automatic sealing of paper bag openings Utility Model Content

[0004] The utility model provides a paper bag sealing device, which aims to solve the problem that paper bags are often sealed manually.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a paper bag sealing device, comprising:

[0006] A conveying structure having a moving direction, wherein the conveying structure is used to drive the paper bag with the opening upward to move along the moving direction;

[0007] A closing structure, a labeling structure, a first pressing structure, and a second pressing structure are arranged in a first direction of the conveying structure and sequentially along the direction of movement, the closing structure is used to push a group of opposite side surfaces of the upper end of the paper bag to move toward each other along the second direction and form a convex tip, the labeling structure is used to attach the label portion to the convex tip, the first pressing structure is used to bend the upper portion of the convex tip into a right angle, and the second pressing structure is used to press the upper portion of the convex tip against the lower portion of the convex tip and adhere to the lower portion of the convex tip through the label;

[0008] The movement direction, the first direction and the second direction are perpendicular to each other.

[0009] Preferably, the closing structure includes a lifting mechanism arranged along the first direction, and the lifting mechanism is provided with two clamping arms moving along the second direction, and the clamping arms are used to push a group of opposite side surfaces at the upper end of the paper bag to move toward each other along the second direction.

[0010] Preferably, the lifting mechanism includes a slide and a first linear module driving the slide to move along a first direction;

[0011] The slide is provided with a guide groove opened along the second direction, and the two clamping arms are slidably arranged in the guide groove;

[0012] A connecting arm is rotatably arranged on each clamping arm. A second linear module is arranged on the sliding table. The two connecting arms are rotatably connected to the second linear module, and the second linear module pulls the connecting arms to move in the first direction to drive the two clamping arms to move in the second direction.

[0013] Preferably, the labeling structure includes an unwinding roller, a winding roller and a labeling platform. The unwinding roller is used for winding a label tape with labels, the winding roller is used for winding the label tape without labels, and the label tape passes through the unwinding roller, the labeling platform and the winding roller in sequence.

[0014] Preferably, a plurality of auxiliary rollers are further arranged between the unwinding roller and the labeling platform, and between the winding roller and the labeling platform;

[0015] The winding roller is a driving roller; or

[0016] Both the winding roller and the unwinding roller are driving rollers, and the linear speeds of the winding roller and the unwinding roller are the same.

[0017] Preferably, the labeling structure further includes a labeling fixing plate. The unwinding roller, the winding roller and the labeling platform are arranged on the labeling fixing plate, and the labeling fixing plate can move in the first direction.

[0018] Preferably, the first pressing structure includes a supporting plate and a first pressing plate. The two supporting plates are arranged on both sides of the conveying structure along the second direction, and the two supporting plates can rotate around the first direction as an axis;

[0019] The first pressing plate and the two supporting plates move along the first direction respectively to press the upper part of the convex tip on the supporting plate.

[0020] Preferably, the first pressing structure includes a first lifting module and a first steering module for driving the supporting plate. The first steering module is arranged on the first lifting module, and the supporting plate is arranged on the first steering module;

[0021] The first pressing structure further includes a second lifting module for driving the first pressing plate to move. The second lifting module is arranged above the first lifting module.

[0022] Preferably, the second pressing structure includes a curved second pressing plate. The second pressing plate moves up and down along the first direction to bond the label on the lower part of the convex tip.

[0023] Preferably, the paper bag sealing device further includes a control system. The control system includes a first positioning sensor, a second positioning sensor and a third positioning sensor;

[0024] The closing structure positions the paper bag through the first positioning sensor and then closes the mouth of the paper bag to form a convex tip;

[0025] The first pressing structure positions the paper bag through the second positioning sensor and then bends the upper part of the convex tip;

[0026] The second pressing structure positions the paper bag through the third positioning sensor and then bonds the label to the paper bag.

[0027] The above solution of the present utility model has the following beneficial effects:

[0028] In this application, the conveying structure drives the paper bag to pass through the closing structure, the labeling structure, the first pressing structure and the second pressing structure in sequence. Through a series of processes, the upper end of the paper bag can be sealed without manual intervention, which not only ensures the hygiene and safety, but also realizes automatic sealing and improves the sealing efficiency.

[0029] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 are schematic diagrams of the structure of the paper bag in different states;

[0031] Figure 2 is a schematic diagram of the crease line after the paper bag is unfolded;

[0032] Figure 3 is a schematic diagram of the structure of this application;

[0033] Figure 4 is a schematic diagram of the closing structure;

[0034] Figure 5 is a perspective view of one side of the labeling structure;

[0035] Figure 6 is a perspective view of the other side of the labeling structure;

[0036] Figure 7 is a schematic diagram of the first and second pressing structures (the frame is omitted).

[0037]

DESCRIPTION OF THE REFERENCE NUMERALS

[0038] 100 - conveying structure,

[0039] 200 - closing structure, 210 - lifting mechanism, 211 - sliding table, 212 - first linear module, 213 - guiding groove, 214 - connecting arm, 215 - second linear module, 216 - connecting piece,

[0040] 220 - clamping arm,

[0041] 300 - Labeling structure, 310 - Unwinding roller, 320 - Rewinding roller, 330 - Labeling platform, 340 - Auxiliary roller, 350 - Labeling fixing plate, 360 - Third linear module, 370 - Second motor,

[0042] 400 - First pressing structure, 410 - Support plate, 420 - First pressing plate, 430 - First lifting module, 440 - First steering module, 450 - Second lifting module,

[0043] 500 - Second pressing structure, 510 - Second pressing plate, 520 - Third lifting module,

[0044] 600 - First positioning sensor,

[0045] 700 - Second positioning sensor,

[0046] 800 - Third positioning sensor,

[0047] 900 - Frame.

[0048] A - Convex tip, A1 - Upper part of the convex tip, A2 - Lower part of the convex tip, B - Label tape, B1 - Label, C - Crease line, C1 - Center point. Detailed implementation manner

[0049] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0050] As Figure 1-7 shown, an embodiment of the present utility model provides a paper bag sealing device, including a conveying structure 100, a closing structure 200, a labeling structure 300, a first pressing structure 400 and a second pressing structure 500. Among them, the conveying structure 100 has a moving direction, and the conveying structure 100 is used to drive a paper bag with an upward opening to move along the moving direction. In this application, the moving direction is the x - axis direction.

[0051] The aforementioned closing structure 200, labeling structure 300, first pressing structure 400 and second pressing structure 500 are arranged relative to the conveying structure 100 in a first direction, and the closing structure 200, labeling structure 300, first pressing structure 400 and second pressing structure 500 are arranged in sequence along the moving direction. The closing structure 200 is located upstream of the moving direction, and the second pressing structure 500 is located downstream of the moving direction. In this application, the first direction is the z - axis direction.

[0052] The closing structure 200 is used to push a set of opposite sides at the upper end of the paper bag to move towards each other in the second direction (in this application, it is the y-axis direction). When this set of opposite sides move towards each other, the upper ends of the other set of opposite sides approach each other, causing the upper end of the paper bag to form a convex tip A as shown in Figure 1 b in the figure. As the paper bag moves under the transportation of the conveying structure 100, it reaches below the labeling structure 300. The labeling structure 300 bonds a part of the label B1 to the upper part A1 of the convex tip, and the other part of the label B1 is the free part. The paper bag continues to move to below the first pressing structure 400. Under the action of the first pressing structure 400, the first pressing structure 400 bends the upper part A1 of the convex tip into a right angle; the paper bag continues to move to below the second pressing structure 500. Under the action of the second pressing structure 500, the second pressing structure 500 further presses down the upper part A1 of the convex tip along the trajectory line where the convex tip A is bent into a right angle until the free part of the label B1 is bonded to the lower part A2 of the convex tip. Under the bonding action of the label B1, the upper part A1 of the convex tip is bonded to the lower part A2 of the convex tip, completing the sealing of the opening of the paper bag.

[0053] In this application, the moving direction, the first direction, and the second direction are perpendicular to each other.

[0054] In this application, the opening of the paper bag can be automatically sealed, and no manual intervention is required during the sealing process, which can effectively improve the sealing efficiency. At the same time, due to no manual intervention, the food safety is indirectly ensured.

[0055] As shown in Figure 2 , there are respectively preset crease lines C on the two surfaces of the upper end of the paper bag pushed by the closing structure 200, and the three crease lines C intersect at the center point C1. The setting method and position of the crease lines C are the same as those in the prior art.

[0056] The closing structure 200 includes a lifting mechanism 210. There are two clamping arms 220 arranged on the lifting mechanism 210 and moving in the second direction. The two clamping arms 220 are used to push a set of opposite sides at the upper end of the paper bag to move in the second direction.

[0057] For the convenience of description, the two surfaces provided with the crease lines C are set as the first surface and the third surface, and the other two surfaces respectively connected to the first surface and the third surface are set as the second surface and the fourth surface.

[0058] When the paper bag moves below the closing structure 200, the two clamping arms 220 move downward. When the lower ends of the clamping arms 220 reach the center point C1, the two clamping arms 220 push towards each other in the second direction, pushing the first surface and the third surface to move towards each other. At this time, because there are crease lines C provided on the first surface and the third surface, the first surface and the third surface are bent along the crease lines C. While the first surface and the third surface are being bent, the second surface and the fourth surface approach each other due to the deformation of the upper ends of the first surface and the third surface, forming a triangular convex tip A.

[0059] Specifically, the lifting mechanism 210 includes a sliding table 211 and a first linear module 212. The movable end of the first linear module 212 is connected to the sliding table 211. Under the push of the first linear module 212, the sliding table 211 moves along the first direction. A guiding groove 213 is formed on the sliding table 211. The guiding groove 213 is arranged along the second direction. The two clamping arms 220 are slidably arranged in the guiding groove 213, and the two clamping arms 220 can move along the second direction in the guiding groove 213.

[0060] Furthermore, a connecting arm 214 is provided in the middle of each clamping arm 220. A second linear module 215 is arranged on the sliding table 211, and a connecting member 216 is arranged on the second linear module 215. The connecting member 216 moves along the first direction under the action of the second linear module 215. One end of the aforementioned connecting arm 214 is hinged to the connecting member 216, and the other end is hinged to the middle of the clamping arm 220. When the second linear module 215 drives the connecting member 216 to move along the first direction, the two clamping arms 220 move relatively or away from each other in the second direction.

[0061] Preferably, the paper bag sealing device further includes a frame 900. A guiding slide rail is arranged on the frame 900, and the sliding table 211 is slidably arranged on the guiding slide rail.

[0062] In this embodiment, the first linear module 212 includes a lead screw and a first motor drivingly connected to the lead screw. The first motor drives the lead screw to perform a rotary motion, thereby driving the sliding table 211 screwed to the lead screw to perform a linear reciprocating motion in the first direction.

[0063] In this embodiment, the second linear module 215 is a linear cylinder, and the connecting member 216 is arranged at the telescopic end of the linear cylinder. When the linear cylinder moves, it drives the connecting member 216 to move along the first direction, so that the clamping arms 220 approach or separate.

[0064] In another embodiment of the present application, the labeling structure 300 includes an unwinding roller 310, a winding roller 320, and a labeling platform 330. The unwinding roller 310 and the winding roller 320 are arranged upstream in the moving direction, and the labeling platform 330 is arranged downstream in the moving direction and the end of the labeling platform 330 close to the downstream is lower than the end close to the upstream. A label tape B is wound around the unwinding roller 310. A plurality of labels B1 are arranged along the length direction of the label tape B. One end of the label tape B is wound around the unwinding roller 310, and the other end is fixed to the winding roller 320 after passing around the labeling platform 330.

[0065] When the paper bag moves to the lower part of the labeling structure 300, the winding roller 320 works to pull the label tape B. Since the labels B1 on the label tape B are pre-bonded to the label tape B, the label tape B and the labels B1 are separated when passing through the labeling platform 330. The label tape B without the labels B1 is wound by the winding roller 320. When the paper bag passes through the labeling platform 330, the separated labels B1 are partially bonded to the convex tip part A1.

[0066] Preferably, in order to ensure that the labels B1 are separated from the label tape B when the label tape B passes through the labeling platform 330, a plurality of auxiliary rollers 340 are arranged between the unwinding roller 310 and the labeling platform 330 and between the winding roller 320 and the labeling platform 330. The auxiliary rollers 340 are used to tension the label tape B, and the labels B1 are peeled off from the label tape B by using the different tensions of the label tape B and the labels B1 and cooperating with the labeling platform 330.

[0067] In some embodiments, the aforementioned winding roller 320 is a driving roller.

[0068] In other embodiments, both the aforementioned winding roller 320 and the unwinding roller 310 are driving rollers, and the linear speeds of the winding roller 320 and the unwinding roller 310 are the same.

[0069] Furthermore, the labeling structure 300 further includes a labeling fixing plate 350. The unwinding roller 310 and the winding roller 320 are rotatably arranged on the labeling fixing plate 350, and the labeling platform 330 is fixedly arranged on the labeling fixing plate 350. The labeling fixing plate 350 can move in the first direction. By adjusting the height of the labeling fixing plate 350, the distance between the labeling platform 330 and the convex tip A can be adjusted to ensure that the labeling structure 300 can stick the labels B1 on paper bags at different heights.

[0070] Specifically, the labeling fixing plate 350 is slidably arranged on the frame 900. A third linear module 360 is further arranged on the frame 900. The telescopic end of the third linear module 360 is fixedly connected to the labeling fixing plate 350. The labeling fixing plate 350 moves in the first direction under the drive of the third linear module 360.

[0071] Preferably, a second motor 370 is further provided on the labeling fixing plate 350. When only the winding roller 320 is the driving roller, the second motor 370 is in chain drive with the winding roller 320. As Figure 6 , when both the winding roller 320 and the unwinding roller 310 are driving rollers, the second motor 370 is in chain drive with the winding roller 320 and the unwinding roller 310 respectively.

[0072] In some embodiments of the present application, the first pressing structure 400 includes a support plate 410 and a first pressing plate 420. The two support plates 410 are arranged on both sides of the conveying structure 100 along the second direction, and the two support plates 410 can rotate about the first direction as an axis. The first pressing plate 420 and the two support plates 410 move along the first direction respectively to press the upper part A1 of the convex tip against the support plate 410.

[0073] When the paper bag moves to below the first pressing structure 400, the two support plates 410 rotate towards each other about the first direction as an axis. At this time, the direction of the support plate 410 rotates from parallel to the moving direction to perpendicular to the moving direction. The first pressing plate 420 presses downwards, causing the upper part A1 of the convex tip to be slightly bent. At this time, the support plate 410 moves upwards, and the first pressing plate 420 presses the upper part A1 of the convex tip against the support plate 410, causing a right-angle bend between the upper part A1 of the convex tip and the lower part A2 of the convex tip.

[0074] Preferably, a chamfer is provided on the lower surface of the first pressing plate 420 near the upstream end. The chamfer buffers when the upper part A1 of the convex tip contacts the first pressing plate 420, preventing the paper bag from tipping over or collapsing.

[0075] Specifically, the first pressing structure 400 includes a first lifting module 430 and a first steering module 440. The two first lifting modules 430 are respectively arranged on both sides of the conveying structure 100 along the second direction and fixed on the frame 900. A first steering module 440 is respectively arranged on each first lifting module 430, and the support plate 410 is arranged on the first steering module 440.

[0076] Preferably, the support plate 410 is an L-shaped plate, and the first steering module 440 is arranged on the side edge of the support plate 410.

[0077] The first pressing structure 400 further includes a second lifting module 450 fixed on the frame 900. The second lifting module 450 is arranged above the first lifting module 430, and the second lifting module 450 is used to push the first pressing plate 420 to move in the first direction.

[0078] Preferably, both the first lifting module 430 and the second lifting module 450 are cylinders. The first steering module 440 is a servo motor.

[0079] The aforementioned second pressing structure 500 includes a bent second pressing plate 510, and the second pressing plate 510 will bond the label B1 to the lower part A2 of the convex tip along the second direction.

[0080] As described above, after the first pressing structure 400 bends the upper part A1 of the convex tip, at this time, a part of the label B1 is bonded to the upper part A1 of the convex tip, and the other part is a free part. After being pressed by the second pressing plate 510, the free part is bonded to the lower part A2 of the convex tip, realizing the sealing of the paper bag.

[0081] The second pressing structure 500 further includes a third lifting module 520. The third lifting module 520 is fixed on the frame 900, and the telescopic end of the third lifting module 520 is fixedly connected to the second pressing plate 510.

[0082] Preferably, the bending angle of the second pressing plate 510 is the same as the apex angle when the upper part A1 of the convex tip is bonded to the lower part A2 of the convex tip.

[0083] The paper bag sealing device further includes a control system. The control system further includes a first positioning sensor 600, a second positioning sensor 700, and a third positioning sensor 800. The closing structure 200 positions the paper bag through the first positioning sensor 600 and then closes the paper bag to form a convex tip A. The first pressing structure 400 positions the paper bag through the second positioning sensor 700 and then bends the upper part A1 of the convex tip. The second pressing structure 500 positions the paper bag through the third positioning sensor 800 and then bonds the label B1 on the upper part A1 of the convex tip to the lower part A2 of the convex tip.

[0084] In this application, the paper bag goes through the first state, the second state, the third state, the fourth state, and the fifth state. The first state is the initial state. At this time, the paper bag is in a cuboid shape, the opening of the paper bag is upward, and the paper bag is on the conveying structure 100. When the conveying structure 100 moves, the paper bag moves to the lower part of the closing structure 200. At this time, after the first positioning sensor 600 determines that the paper bag is directly below the closing structure 200, it is signal-connected to the central control unit. The central control unit issues a stop command to the conveying structure 100 and a working command to the closing structure 200. The two clamping arms 220 move downward. After reaching the preset position, they move towards each other to form a convex tip A at the upper end of the paper bag. After moving towards each other along the second direction to the designated position, the two clamping arms 220 move in the opposite direction and move upward along the first direction back to the initial position. At this time, the paper bag is in the second state.

[0085] Subsequently, the central control unit issues a working command to the conveying structure 10 , and the conveying structure 100 continues to rotate. At this time, the paper bag in the second state moves towards the labeling structure 300. After passing through the labeling structure 300, the label B1 is pasted on the upper part A1 of the convex tip. At this time, the paper bag is in the third state.

[0086] The paper bag in the third state continues to move towards the first pressing structure 400. When it moves to the first pressing structure 400 and the second positioning sensor 700 determines that the paper bag is below the first pressing structure 400, the central control unit issues a stop command to the conveying structure 100. At the same time, the central control unit issues a rotation command to the first steering module 440, a rising command to the first lifting module 430, and a descending command to the second lifting module 450. Under the action of the first pressing structure 400, the upper part A1 of the convex tip undergoes a right-angle bend, and at this time the paper bag is in the fourth state. After completing the bending action, the central control unit issues a reset command to the first steering module 440, the first lifting module 430, and the second lifting module 450, and issues a movement command to the conveying structure 100. At this time, the paper bag is in the fourth state.

[0087] When the paper bag in the fourth state moves towards the second pressing structure 500 and is pressed by the second pressing plate 510, the label B1 is adhered to the lower part A2 of the convex tip, and at this time the paper bag is in the fifth state, that is, the final sealed state.

[0088] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A paper bag sealing device, characterized in that, Comprising: A conveying structure (100) having a moving direction, the conveying structure (100) being used to drive a paper bag with an upward opening to move along the moving direction; A bag-closing structure (200), a labeling structure (300), a first pressing structure (400) and a second pressing structure (500) which are arranged in the first direction of the conveying structure (100) and arranged in sequence along the moving direction. The bag-closing structure (200) is used to push a set of opposite sides at the upper end of the paper bag to move towards each other along the second direction and form a convex tip (A). The labeling structure (300) is used to partially attach a label (B1) to the convex tip (A). The first pressing structure (400) is used to bend an upper part (A1) of the convex tip into a right angle. The second pressing structure (500) is used to press the upper part (A1) of the convex tip against the lower part (A2) of the convex tip and adhere it to the lower part (A2) of the convex tip through the label (B1); The moving direction, the first direction and the second direction are perpendicular to each other.

2. The paper bag sealing device according to claim 1, characterized in that: The bag-closing structure (200) includes a lifting mechanism (210) arranged along the first direction. Two clamping arms (220) moving along the second direction are arranged on the lifting mechanism (210), and the clamping arms (220) are used to push a set of opposite sides at the upper end of the paper bag to move towards each other along the second direction.

3. The paper bag sealing device according to claim 2, wherein: The lifting mechanism (210) includes a sliding table (211) and a first linear module (212) for driving the sliding table (211) to move along the first direction; A guiding groove (213) is opened on the sliding table (211) along the second direction, and two clamping arms (220) are slidably arranged in the guiding groove (213); A connecting arm (214) is rotatably arranged on each clamping arm (220). A second linear module (215) is arranged on the sliding table (211). The two connecting arms (214) are rotatably connected to the second linear module (215), and the second linear module (215) pulls the connecting arm (214) to move along the first direction to drive the two clamping arms (220) to move in the second direction.

4. The paper bag sealing device according to claim 1, characterized in that: The labeling structure (300) includes an unwinding roller (310), a winding roller (320) and a labeling platform (330). The unwinding roller (310) is used to wind a label tape (B) with a label (B1). The winding roller (320) is used to wind the label tape (B) without a label (B1). The label tape (B) passes through the unwinding roller (310), the labeling platform (330) and the winding roller (320) in sequence.

5. The paper bag sealing device according to claim 4, characterized in that: A number of auxiliary rollers (340) are also arranged between the unwinding roller (310) and the labeling platform (330), and between the winding roller (320) and the labeling platform (330); The winding roller (320) is a driving roller; or Both the winding roller (320) and the unwinding roller (310) are driving rollers, and the linear speeds of the winding roller (320) and the unwinding roller (310) are the same.

6. The paper bag sealing device according to claim 4, wherein: The labeling structure (300) further includes a labeling fixing plate (350), and the unwinding roller (310), the winding roller (320), and the labeling platform (330) are arranged on the labeling fixing plate (350), and the labeling fixing plate (350) can move in the first direction.

7. The paper bag sealing device according to claim 1, wherein: The first pressing structure (400) includes a support plate (410) and a first pressing plate (420). The two support plates (410) are arranged on both sides of the conveying structure (100) along the second direction, and the two support plates (410) can rotate about the first direction as an axis; The first pressing plate (420) and the two support plates (410) move along the first direction respectively to press the upper part (A1) of the convex tip on the support plate (410).

8. The paper bag sealing device according to claim 7, characterized in that: The first pressing structure (400) includes a first lifting module (430) and a first steering module (440) for driving the support plate (410). The first steering module (440) is arranged on the first lifting module (430), and the support plate (410) is arranged on the first steering module (440); The first pressing structure (400) further includes a second lifting module (450) for driving the first pressing plate (420) to move, and the second lifting module (450) is arranged above the first lifting module (430).

9. The paper bag sealing device according to claim 1, wherein: The second pressing structure (500) includes a curved second pressing plate (510), and the second pressing plate (510) moves up and down along the first direction to bond the label (B1) to the lower part (A2) of the convex tip.

10. The paper bag sealing device according to claim 1, characterized in that: The paper bag sealing device further includes a control system, and the control system includes a first positioning sensor (600), a second positioning sensor (700), and a third positioning sensor (800); The closing structure (200) positions the paper bag through the first positioning sensor (600) and then closes the paper bag to form a convex tip (A); The first pressing structure (400) positions the paper bag through the second positioning sensor (700) and then bends the upper part (A1) of the convex tip; The second pressing structure (500) positions the paper bag through the third positioning sensor (800) and then bonds the label (B1) to the paper bag.

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