Packaging bag film sealing device

Abstract

The utility model discloses a packaging bag film sealing device, relates to the technical field of packaging bag film sealing, aims to solve the technical problem that the current packaging bag film sealing device is inconvenient to position the bag mouth of a packaging bag, and comprises a conveying belt structure. A positioning structure is formed by the second electric push rod, the bag body positioning guide plate, the adjusting structure and the bag opening positioning guide plates, the positions of the two bag opening positioning guide plates are adjusted through the adjusting structure, the two bag opening positioning guide plates are made to move to the two sides of a packaging opening of the sealing structure, and then in the moving process of a packaging bag, the packaging bag is sealed. A packaging bag opening can move between the two sets of bag opening positioning guide plates, the bag opening can smoothly enter a packaging opening of the sealing structure to be sealed, the situation that in the packaging bag conveying process of the conveying belt structure, the bag opening shakes, and the packaging opening of the sealing structure deviates is avoided, and the packaging effect is improved. And the situation that the bag opening cannot smoothly enter the packaging opening of the sealing structure to be sealed is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bag sealing films, and more specifically, to a packaging bag sealing film device. Background Technique

[0002] The packaging bag sealing film device is also called a sealing machine. A sealing machine is a machine used to seal packaging bags. Especially after products are loaded into packaging bags, in order to maintain the product quality and avoid product loss, it is necessary to seal the container, and this operation is usually completed by a sealing machine. The types of packaging bag sealing film devices are divided into monomeric and continuous types. The continuous packaging bag sealing film device is mainly composed of a conveying structure, a positioning structure, and a sealing structure. The packaging bag is placed vertically on the conveying structure, and the conveying structure cooperates with the positioning structure thereon to position and convey the packaging bag. Then the bag mouth of the packaging bag passes through the sealing port of the sealing structure, thereby completing the continuous sealing of the packaging bag.

[0003] The positioning structure in the existing packaging bag sealing film device usually only positions and guides the bag body of the packaging bag. However, during the conveying process of the packaging bag, the bag mouth is prone to shaking and deviation, which easily causes the bag mouth to deviate from the sealing port of the sealing structure, resulting in the bag mouth of the packaging bag being unable to smoothly enter the inside of the sealing port of the sealing structure for sealing operation, and requires personnel to perform secondary operations, thus affecting the use performance of the device. In view of this, we propose a packaging bag sealing film device. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, adapt to the actual needs, and provide a packaging bag sealing film device to solve the technical problem that the current packaging bag sealing film device is not convenient for positioning the bag mouth of the packaging bag.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A packaging bag sealing film device, including a conveyor belt structure, a bracket is arranged on the top of the conveyor belt structure, a sealing structure is arranged at the inner bottom of the bracket through a first electric push rod, and positioning structures are arranged on both sides of the bracket;

[0006] The positioning structure includes two groups of bag body positioning and guiding plates and two groups of bag mouth positioning and guiding plates. The two ends between the two groups of bag body positioning and guiding plates and the two groups of bag mouth positioning and guiding plates are in a flare shape. Two groups of symmetric second electric push rods are arranged on both sides of the bracket. The bag body positioning and guiding plates are arranged at the piston ends of the second electric push rods, and the two groups of bag body positioning and guiding plates are symmetrically arranged. An adjusting structure is arranged on the side of the bag body positioning and guiding plate facing the second electric push rod. The bag mouth positioning and guiding plates are arranged on the adjusting structure, and the two groups of bag mouth positioning and guiding plates are symmetrically arranged;

[0007] Notches are opened on the opposite sides of the two groups of bag mouth positioning and guiding plates, and a stabilizing structure is arranged in the notches.

[0008] The utility model forms a positioning structure through the second electric push rod, the bag body positioning guide plate, the adjustment structure and the bag opening positioning guide plate. Therefore, in the process of conveying and sealing the packaging bag by the conveyor belt structure, the spacing between the two groups of bag body positioning guide plates can be adjusted by the second electric push rod to realize the positioning and guiding of the packaging bag belt body, so that the packaging bag can be displaced along the center of the conveyor belt structure, and then the position of the two groups of bag opening positioning guide plates can be adjusted by the adjustment structure, so that the two groups of bag opening positioning guide plates are displaced to the two sides of the sealing opening of the sealing structure, and then in the process of moving the packaging bag, the bag opening of the packaging bag will move along the two groups of bag opening positioning guide plates, so that the bag opening can smoothly enter the sealing opening of the sealing structure for sealing, and avoid the situation that the bag opening cannot smoothly enter the sealing opening of the sealing structure for sealing due to the shaking of the bag opening and the deviation of the sealing opening of the sealing structure during the conveying of the packaging bag by the conveyor belt structure; the utility model also arranges a stabilizing structure on the opposite sides of the two groups of bag opening positioning guide plates, so that when the positions of the two groups of bag opening positioning guide plates are adjusted, the clamping belts of the two groups of stabilizing structures can be attached together, Then, when the packaging bag is conveyed, the two sets of clamping belts will clamp the bag opening, and the two sets of clamping belts rotate and move synchronously with the packaging bag, which can further improve the positioning and guiding effect of the two sets of bag opening positioning guide plates on the bag opening, and the matching roller will be driven to rotate during the movement of the clamping belts. The top of the matching roller at the front end of the stable structure can press the bag opening of the packaging bag to make the bag opening close together, so that the bag opening can smoothly enter the sealing port of the sealing structure. The top of the matching roller at the rear end of the stable structure can press the bag opening of the sealed packaging bag to ensure the packaging bag Sealing effect of the seal; the top of the matching roller shaft of the utility model is provided with a sleeve, a bolt, a docking screw hole, a first connecting rod, an expansion and contraction plate, a second connecting rod and a rubber sleeve and other structures. By tightening the bolt, the sleeve can be driven to move up and down on the matching roller shaft. At this time, under the limiting cooperation of the first connecting rod and the second connecting rod, the expansion and contraction plate will stretch or contract to form an expansion and contraction structure. Therefore, when the two symmetrical sets of matching roller shafts clamp the bag opening, the diameter of the top end of the matching roller shaft can be adjusted to expand and contract as needed, so as to further control the pressing force on the bag opening according to the size of the bag body.

[0009] Preferably, the stabilizing structure includes a first roller shaft, which is symmetrically arranged at both ends inside the slot and rotatably arranged, and a clamping belt is arranged between the two groups of first roller shafts, one side of the clamping belt is located outside the slot, and a driving structure is arranged on the side of the bag opening positioning guide plate facing away from the slot, and the driving structure and a group of first roller shafts are symmetrically arranged.

[0010] Preferably, the driving structure includes a motor, which is arranged on the bag opening positioning guide plate, and a first pulley is arranged at the output end of the motor through a rotating shaft, a second pulley is arranged at the top end of a group of the first rollers passing through the slot, and a transmission belt is arranged between the second pulley and the first pulley.

[0011] Preferably, several groups of mating rollers are equidistantly arranged at both ends of the slot, and the mating rollers are rotatably arranged. The mating rollers at both ends of the slot correspond to the front and back of the sealing structure respectively. A sleeve is mounted on the top of the mating roller that passes through the slot, and a bolt is rotatably arranged at the center of the top of the sleeve. A docking screw hole symmetrical to the bolt is opened on the top of the mating roller, and the bolt is screwed and docked with the docking screw hole. An expansion and contraction plate is movably arranged around the sleeve through a first connecting rod, and a second connecting rod is hingedly arranged at the bottom of the expansion and contraction plate, and the bottom end of the second connecting rod is hingedly connected to the mating roller, and a rubber sleeve is sleeved on the outer side of the first connecting rod around the sleeve.

[0012] Preferably, the mating roller is located inside the entrainment belt, the mating roller and the first roller are both flower shafts, the inner wall of the entrainment belt is arranged with transmission teeth, and the transmission teeth are meshed with the mating roller and the first roller.

[0013] Preferably, the adjustment structure includes two groups of third electric push rods, which are symmetrically arranged on the bag body positioning guide plate. A mounting plate is arranged at the piston end of the third electric push rod, and a fourth electric push rod is symmetrically arranged on one side of the mounting plate. The piston end of the fourth electric push rod is connected to the bag mouth positioning guide plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model forms a positioning structure through the second electric push rod, the bag body positioning guide plate, the adjustment structure and the bag mouth positioning guide plate. Therefore, in the process of conveying and sealing the packaging bag by the conveyor belt structure, the spacing between the two groups of bag body positioning guide plates can be adjusted by the second electric push rod to realize the positioning and guiding of the packaging bag belt body, so that the packaging bag can be displaced along the center of the conveyor belt structure, and then the position of the two groups of bag mouth positioning guide plates can be adjusted by the adjustment structure, so that the two groups of bag mouth positioning guide plates are displaced to the two sides of the sealing opening of the sealing structure, and then in the process of moving the packaging bag, the bag mouth of the packaging bag will move along the two groups of bag mouth positioning guide plates, so that the bag mouth can smoothly enter the sealing opening of the sealing structure for sealing, thereby avoiding the situation that the bag mouth shakes and deviates from the sealing opening of the sealing structure during the conveying of the packaging bag by the conveyor belt structure, causing the bag mouth to be unable to smoothly enter the sealing opening of the sealing structure for sealing, thereby solving the technical problem that the current packaging bag film sealing device is not convenient for positioning the bag mouth of the packaging bag. Therefore, the utility model has the advantage of more stable packaging bag sealing effect.

[0016] 2. The utility model also sets a stabilizing structure on the opposite sides of the two groups of bag mouth positioning and guiding plates. When adjusting the positions of the two groups of bag mouth positioning and guiding plates, the clamps of the two groups of stabilizing structures can be made to fit together. Then, when the packaging bag is conveyed, the two groups of clamps will clamp the bag mouth, and the two groups of clamps will rotate and displace synchronously with the packaging bag, which can further improve the positioning and guiding effect of the two groups of bag mouth positioning and guiding plates on the bag mouth. And during the movement of the clamps, the cooperating roller shafts will be driven to rotate. The top of the cooperating roller shaft at the front end of the stabilizing structure can press the bag mouth of the packaging bag, making the bag mouth close together, so that the bag mouth can smoothly enter the sealing opening of the sealing structure. The top of the cooperating roller shaft at the rear end of the stabilizing structure can press and fix the bag mouth of the packaged bag after sealing, ensuring the sealing effect of the packaging bag sealing.

[0017] 3. Structures such as sleeves, bolts, butt screw holes, first connecting rods, expansion and contraction plates, second connecting rods, and rubber sleeves are set at the top of the cooperating roller shafts of the utility model. By turning the bolts, the sleeves can be driven to move up and down on the cooperating roller shafts. At this time, under the limiting cooperation of the first connecting rod and the second connecting rod, the expansion and contraction plates will expand or contract, thus forming an expansion and contraction structure. Therefore, when the two groups of symmetric cooperating roller shafts clamp the bag mouth, the diameter of the top of the cooperating roller shafts can be adjusted for expansion and contraction as needed, so as to further control the pressing force on the bag mouth according to the bag body size. Brief Description of the Drawings

[0018] Figure 1 is the overall structure schematic diagram of the utility model;

[0019] Figure 2 is the schematic diagram of the bracket and positioning structure of the utility model;

[0020] Figure 3 is the schematic diagram of the adjustment structure of the utility model;

[0021] Figure 4 is the schematic diagram of the bag mouth positioning and guiding plate structure of the utility model;

[0022] Figure 5 is the cross-sectional structure schematic diagram of the bag mouth positioning and guiding plate of the utility model;

[0023] Figure 6 is of the utility model Figure 5 magnified schematic diagram at position A;

[0024] Figure 7 is the schematic diagram of the cooperating roller shaft structure of the utility model;

[0025] Figure 8 is the cross-sectional structure schematic diagram of the cooperating roller shaft of the utility model.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Conveyor belt structure; 2. Bracket; 3. First electric push rod; 4. Sealing structure; 5. Second electric push rod; 6. Bag body positioning and guiding plate; 7. Adjusting structure; 701. Third electric push rod; 702. Fourth electric push rod; 703. Mounting plate; 8. Bag mouth positioning and guiding plate; 801. Notch; 9. First roller shaft; 10. Matching roller shaft; 1001. Sleeve; 1002. Bolt; 1003. Docking screw hole; 1004. First connecting rod; 1005. Expansion and contraction plate; 1006. Second connecting rod; 1007. Rubber sleeve; 1008. Flower shaft; 11. Driving structure; 1101. Motor; 1102. First pulley; 1103. Second pulley; 1104. Transmission belt; 12. Entrainment; 1201. Transmission tooth opening; 13. Positioning structure; 14. Stabilizing structure. Detailed implementation manner

[0028] As Figures 1 to 8 shown, a packaging bag sealing film device related to the present utility model includes a conveyor belt structure 1. A bracket 2 is arranged on the top of the conveyor belt structure 1. A sealing structure 4 is arranged at the inner bottom of the bracket 2 through a first electric push rod 3. Positioning structures 13 are arranged on both sides of the bracket 2. When sealing a packaging bag, the height of the sealing structure 4 can be adjusted through the first electric push rod 3 according to the height requirement of the packaging bag. Then, the packaging bag is placed vertically on the conveyor belt structure 1, and the packaging bag is kept placed sideways. Then, the conveyor belt structure 1 conveys the packaging bag. During the conveying process, the positioning structures 13 position and guide the packaging bag to make it located in the center of the conveyor belt structure 1. When the packaging bag passes through the sealing structure 4, the bag mouth of the packaging bag completes the sealing operation through the sealing opening of the sealing structure 4.

[0029] In an embodiment of the present utility model, the positioning structure 13 includes two groups of bag body positioning guide plates 6 and two groups of bag mouth positioning guide plates 8. The two ends between the two groups of bag body positioning guide plates 6 and the two groups of bag mouth positioning guide plates 8 are in a flare shape. Two groups of symmetric second electric push rods 5 are arranged on both sides of the bracket 2. The bag body positioning guide plates 6 are arranged at the piston ends of the second electric push rods 5, and the two groups of bag body positioning guide plates 6 are symmetrically arranged. An adjusting structure 7 is arranged on the side of the bag body positioning guide plate 6 facing the second electric push rod 5. The bag mouth positioning guide plates 8 are arranged on the adjusting structure 7, and the two groups of bag mouth positioning guide plates 8 are symmetrically arranged. During the process of the conveyor belt structure 1 transporting and sealing the packaging bag, the distance between the two groups of bag body positioning guide plates 6 can be adjusted by the second electric push rod 5 to realize the positioning and guiding of the bag body of the packaging bag, enabling the packaging bag to displace along the center of the conveyor belt structure 1. Then, the positions of the two groups of bag mouth positioning guide plates 8 are adjusted by the adjusting structure 7, so that the two groups of bag mouth positioning guide plates 8 are displaced to both sides of the sealing opening of the sealing structure 4. Then, during the movement of the packaging bag, the bag mouth of the packaging bag will move along between the two groups of bag mouth positioning guide plates 8, thereby positioning and guiding the bag mouth of the packaging bag, enabling the bag mouth to smoothly enter the sealing opening of the sealing structure 4 for sealing, and avoiding the situation that the bag mouth shakes and deviates from the sealing opening of the sealing structure 4 during the transportation of the packaging bag by the conveyor belt structure 1, resulting in the bag mouth being unable to smoothly enter the sealing opening of the sealing structure 4 for sealing.

[0030] Specifically, the adjusting structure 7 includes two groups of third electric push rods 701. The two groups of third electric push rods 701 are symmetrically arranged on the bag body positioning guide plates 6. The piston end of the third electric push rod 701 is provided with a mounting plate 703. On one side of the mounting plate 703, two groups of fourth electric push rods 702 are symmetrically arranged. The piston end of the fourth electric push rod 702 is connected to the bag mouth positioning guide plate 8. The third electric push rod 701 can drive the mounting plate 703 to lift, thereby driving the bag mouth positioning guide plate 8 to lift, and the height of the bag mouth positioning guide plate 8 can be adjusted. The fourth electric push rod 702 can drive the bag mouth positioning guide plate 8 to displace left and right, realizing the adjustment of the horizontal position of the bag mouth positioning guide plate 8.

[0031] In an embodiment of the present utility model, notch openings 801 are provided on the opposite sides of two groups of bag mouth positioning and guiding plates 8, and a stabilizing structure 14 is arranged in the notch openings 801. When adjusting the positions of the two groups of bag mouth positioning and guiding plates 8, the clamps 12 of the two groups of stabilizing structures 14 can be made to fit together. Then, when the packaging bag is conveyed, the two groups of clamps 12 will clamp the bag mouth, and the two groups of clamps 12 rotate and displace synchronously with the packaging bag, which can further improve the effect of the two groups of bag mouth positioning and guiding plates 8 on positioning and guiding the bag mouth. Moreover, during the movement of the clamps 12, the cooperating roller shafts 10 will be driven to rotate. The top of the cooperating roller shaft 10 at the front end of the stabilizing structure 14 can press the bag mouth of the packaging bag so that the bag mouths are closely attached together, and thus the bag mouths can smoothly enter the sealing opening of the sealing structure 4. The top of the cooperating roller shaft 10 at the rear end of the stabilizing structure 14 can press and fix the bag mouth of the packaged bag after sealing to ensure the sealing effect of the packaging bag sealing.

[0032] Specifically, the stabilizing structure 14 includes first roller shafts 9. The first roller shafts 9 are symmetrically arranged at both ends inside the notch openings 801, and the first roller shafts 9 are rotatably arranged. A clamp 12 is arranged between the two groups of first roller shafts 9. One side of the clamp 12 is located outside the notch openings 801. A driving structure 11 is arranged on the side of the bag mouth positioning and guiding plate 8 facing away from the notch openings 801, and the driving structure 11 and one group of first roller shafts 9 are symmetrically arranged. The driving structure 11 includes a motor 1101. The motor 1101 is arranged on the bag mouth positioning and guiding plate 8. A first pulley 1102 is arranged at the output end of the motor 1101 through a rotating shaft. One group of first roller shafts 9 penetrates through the top of the notch openings 801 and a second pulley 1103 is arranged, and a transmission belt 1104 is arranged between the second pulley 1103 and the first pulley 1102. The motor 1101 drives the first pulley 1102 to rotate, and then the first pulley 1102 drives the second pulley 1103 to rotate through the transmission belt 1104. The second pulley 1103 drives the corresponding first roller shaft 9 to rotate, and then the two groups of first roller shafts 9 cooperate to drive the clamp 12 to rotate, so that when the two groups of clamps 12 clamp the bag mouth of the packaging bag, they can displace synchronously with the packaging bag.

[0033] Furthermore, the cooperating roller shafts 10 are located inside the clamps 12. The cooperating roller shafts 10 and the first roller shafts 9 are both splined shafts 1008. Transmission tooth openings 1201 are arranged on the inner wall of the clamps 12, and the transmission tooth openings 1201 mesh with the cooperating roller shafts 10 and the first roller shafts 9. When the two groups of clamps 12 fit together, the symmetrically arranged cooperating roller shafts 10 also fit together. When the clamps 12 rotate, they drive the cooperating roller shafts 10 to rotate.

[0034] In an embodiment of the present utility model, a number of groups of mating roller shafts 10 are arranged at equal distances at both ends inside the notch 801, and the mating roller shafts 10 are rotatably arranged. The mating roller shafts 10 at both ends inside the notch 801 correspond to the front and back of the sealing structure 4 respectively. A sleeve 1001 is sleeved through the top end of the notch 801 on the mating roller shaft 10. A bolt 1002 is rotatably arranged at the center of the top of the sleeve 1001. A docking screw hole 1003 symmetrical to the bolt 1002 is opened at the top end of the mating roller shaft 10, and the bolt 1002 is screwed and docked with the docking screw hole 1003. A telescopic plate 1005 is movably arranged around the sleeve 1001 through a first connecting rod 1004. The bottom of the telescopic plate 1005 is hinged with a second connecting rod 1006, and the bottom end of the second connecting rod 1006 is hinged and connected to the mating roller shaft 10. A rubber sleeve 1007 is sleeved outside the first connecting rod 1004 around the sleeve 1001. The first connecting rod 1004 is connected to the mating roller shaft 10 and the telescopic plate 1005 by means of hinge connections. By screwing the bolt 1002, the sleeve 1001 can be driven to displace up and down on the mating roller shaft 10. At this time, under the limiting cooperation of the first connecting rod 1004 and the second connecting rod 1006, the telescopic plate 1005 will extend outwards or contract inwards, thus forming a telescopic structure. Therefore, when clamping the bag mouth at the top ends of the two symmetrical groups of mating roller shafts 10, the diameter of the top ends of the mating roller shafts 10 can be adjusted in a telescopic manner according to needs, so as to further control the pressing force on the bag mouth according to the bag body size.

[0035] Working principle: This embodiment provides a packaging bag film sealing device. First, when sealing the packaging bag, according to the height requirement of the packaging bag, the height of the sealing structure 4 can be adjusted by the first electric push rod 3. Then, the packaging bag is vertically placed on the conveyor belt structure 1, and the packaging bag is placed sideways. Then, the conveyor belt structure 1 conveys the packaging bag. During the conveying process, the positioning structure 13 positions and guides the packaging bag to make it located in the center of the conveyor belt structure 1. When the packaging bag passes through the sealing structure 4, the bag mouth of the packaging bag completes the sealing operation through the sealing port of the sealing structure 4;

[0036] Secondly, during the process of the conveyor belt structure 1 conveying and sealing the packaging bag, the distance between the two bag body positioning and guiding plates 6 can be adjusted by the second electric push rod 5 to realize the positioning and guiding of the bag body of the packaging bag, so that the packaging bag can be displaced along the center of the conveyor belt structure 1. Then, the positions of the two bag mouth positioning and guiding plates 8 are adjusted by the adjusting structure 7, so that the two bag mouth positioning and guiding plates 8 are displaced to both sides of the sealing port of the sealing structure 4. Then, during the movement of the packaging bag, the bag mouth of the packaging bag will move along between the two bag mouth positioning and guiding plates 8, thereby positioning and guiding the bag mouth of the packaging bag, so that the bag mouth can smoothly enter the sealing port of the sealing structure 4 for sealing, and avoiding the situation that during the conveying process of the conveyor belt structure 1 for the packaging bag, the bag mouth shakes and deviates from the sealing port of the sealing structure 4, resulting in the bag mouth being unable to smoothly enter the sealing port of the sealing structure 4 for sealing.

[0037] Secondly, when adjusting the positions of the two groups of bag mouth positioning guide plates 8, the clamps 12 of the two groups of stabilizing structures 14 can be made to fit together. Then, when the packaging bag is conveyed, the two groups of clamps 12 will clamp the bag mouth, and the two groups of clamps 12 rotate and displace synchronously with the packaging bag, which can further improve the effect of the two groups of bag mouth positioning guide plates 8 on positioning and guiding the bag mouth. Moreover, during the movement of the clamps 12, the cooperating roller shafts 10 will be driven to rotate. The top of the cooperating roller shaft 10 at the front end of the stabilizing structure 14 can press the bag mouth of the packaging bag, making the bag mouth close together, so that the bag mouth can smoothly enter the sealing opening of the sealing structure 4. The top of the cooperating roller shaft 10 at the rear end of the stabilizing structure 14 can press and fix the bag mouth of the packaged bag after sealing, ensuring the sealing effect of the packaging bag sealing;

[0038] Finally, by turning the bolt 1002, the sleeve 1001 can be driven to move up and down on the cooperating roller shaft 10. At this time, under the limiting cooperation of the first connecting rod 1004 and the second connecting rod 1006, the expansion and contraction plate 1005 will extend outwards or contract inwards, thus forming an expansion and contraction structure. Therefore, when the tops of the two symmetrically arranged cooperating roller shafts 10 clamp the bag mouth, the diameter of the tops of the cooperating roller shafts 10 can be adjusted for expansion and contraction as needed, so as to further control the pressing force on the bag mouth according to the size of the bag body.

[0039] The embodiments disclosed in the present invention are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A packaging bag sealing device, characterized in that: It comprises a conveyor belt structure (1), a bracket (2) is arranged on the top of the conveyor belt structure (1), a sealing structure (4) is arranged on the bottom of the bracket (2) via a first electric push rod (3), and positioning structures (13) are arranged on both sides of the bracket (2); The positioning structure (13) comprises two groups of bag body positioning guide plates (6) and two groups of bag opening positioning guide plates (8), the two ends of the two groups of bag body positioning guide plates (6) and the two groups of bag opening positioning guide plates (8) are in an "eight" shape, two groups of symmetrical second electric push rods (5) are arranged on both sides of the bracket (2), the bag body positioning guide plates (6) are arranged at the piston end of the second electric push rod (5), and the two groups of bag body positioning guide plates (6) are arranged symmetrically, the bag body positioning guide plates (6) are arranged on one side facing the second electric push rod (5) with an adjustment structure (7), the bag opening positioning guide plates (8) are arranged on the adjustment structure (7), and the two groups of bag opening positioning guide plates (8) are arranged symmetrically; The two groups of bag opening positioning guide plates (8) are provided with slots (801) on opposite sides, and a stabilizing structure (14) is arranged in the slots (801).

2. A packaging bag sealing device according to claim 1, characterized in that: The stabilizing structure (14) comprises a first roller (9), wherein the first roller (9) is symmetrically arranged at two ends inside the slot (801), and the first roller (9) is rotatably arranged, and a clamping belt (12) is arranged between the two groups of first rollers (9), and one side of the clamping belt (12) is located outside the slot (801), and a driving structure (11) is arranged on the side of the bag opening positioning guide plate (8) facing away from the slot (801), and the driving structure (11) and a group of first rollers (9) are symmetrically arranged.

3. A packaging bag sealing device according to claim 2, characterized in that: The driving structure (11) comprises a motor (1101), wherein the motor (1101) is arranged on a bag opening positioning guide plate (8), and a first pulley (1102) is arranged at the output end of the motor (1101) via a rotating shaft, and a second pulley (1103) is arranged at the top end of a group of the first rollers (9) passing through the slot (801), and a transmission belt (1104) is arranged between the second pulley (1103) and the first pulley (1102).

4. A packaging bag sealing device according to claim 2, characterized in that: A plurality of groups of matching rollers (10) are equidistantly arranged at both ends of the slot (801), and the matching rollers (10) are rotatably arranged. The matching rollers (10) at both ends of the slot (801) correspond to the front and rear of the sealing structure (4) respectively. A sleeve (1001) is sleeved on the top end of the matching roller (10) that passes through the slot (801). A bolt (1002) is rotatably arranged at the center of the top of the sleeve (1001). A bolt (1002) is symmetrically arranged on the top end of the matching roller (10). The bolt (1002) is screwed into the docking screw hole (1003) and docked with the docking screw hole (1003); an expansion plate (1005) is movably arranged around the sleeve (1001) through the first connecting rod (1004); a second connecting rod (1006) is hingedly arranged at the bottom of the expansion plate (1005); and the bottom end of the second connecting rod (1006) is hingedly connected to the matching roller shaft (10); and a rubber sleeve (1007) is sleeved on the outer side of the first connecting rod (1004) around the sleeve (1001).

5. A packaging bag sealing device according to claim 4, characterized in that: The mating roller shaft (10) is located inside the entrainment belt (12); the mating roller shaft (10) and the first roller shaft (9) are both flower shafts (1008); the inner wall of the entrainment belt (12) is provided with a transmission tooth opening (1201), and the transmission tooth opening (1201) is meshed with the mating roller shaft (10) and the first roller shaft (9).

6. The packaging bag sealing device according to claim 1, characterized in that: The adjustment structure (7) comprises two groups of third electric push rods (701), which are symmetrically arranged on the bag body positioning guide plate (6), and a mounting plate (703) is arranged at the piston end of the third electric push rod (701), and a fourth electric push rod (702) is symmetrically arranged on one side of the mounting plate (703), and the piston end of the fourth electric push rod (702) is connected to the bag opening positioning guide plate (8).

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