A gusset mechanism in a bag production

Abstract

This utility model relates to a corner insertion mechanism in packaging bag production. Two adjacent conveying channels in the front-to-back direction are referred to as the front conveying channel and the rear conveying channel. A front corner insert is hinged to the rear end of the front conveying channel, and a front corner insert is hinged to the front end of the rear conveying channel. Both the front and rear corner inserts include a corner insert shaft. An upper mounting arm is fixed to the upper end of the corner insert shaft, and a lower mounting arm is fixed to the lower end of the corner insert shaft. A triangular corner insert plate is fixed to the upper mounting arm, and a corner insert drive shaft is fixed to the lower mounting arm. The corner insertion mechanism also includes a corner insert control rail. A circumferentially closed corner insert control surface is provided on the upper surface of the control rail body. The corner insert control surface includes a straight segment extending in the front-to-back direction and an arc segment located at the end of the control rail body. This utility model provides a corner insertion mechanism applicable to continuous packaging bag production.

Description

Technical Field

[0001] This utility model relates to supporting equipment in the continuous production and packaging of packaging bags, and more particularly to a corner insertion mechanism in the production of packaging bags. Background Technology

[0002] In the existing technology, the packaging of products in other fields such as wet wipes and paper towels is carried out during the conveying process. For example, the product is first longitudinally sealed using a packaging bag. After longitudinal sealing, the product is conveyed forward using a conveying mechanism. When it reaches the end-sealing station, the end-sealing mechanism is used to perform the end-sealing operation on the packaging bag.

[0003] To improve the stability of bag sealing and reduce scrap rates, end-sealing of bags requires folding the two corners of the bag to form corner inserts after sealing. Traditional corner inserting methods typically use a power mechanism to drive a triangular corner insert plate, which reciprocates to press the bag. This traditional method is not well-suited for use in continuous production and packaging.

[0004] The packaging bag conveying mechanism in the prior art usually includes a left conveying mechanism and a right conveying mechanism. The left conveying mechanism is provided with multiple left conveying grooves, and the right conveying mechanism is provided with multiple right conveying grooves corresponding to the left conveying grooves. Utility Model Content

[0005] The purpose of this invention is to provide a corner insertion mechanism that can be applied to the continuous production of packaging bags.

[0006] The technical solution of the corner insertion mechanism in the production of packaging bags according to this utility model is as follows:

[0007] A corner insertion mechanism for packaging bag production includes a left conveying mechanism and a right conveying mechanism. Both the left and right conveying mechanisms include multiple conveying channels spaced apart circumferentially. Two adjacent conveying channels in the front-to-back direction are referred to as the front conveying channel and the rear conveying channel. A front corner insert is hinged to the rear end of the front conveying channel and a front corner insert is hinged to the front end of the rear conveying channel. Both the front and rear corner inserts include a corner insert shaft. An upper mounting arm is fixed to the upper end of the corner insert shaft, and a lower mounting arm is fixed to the lower end of the corner insert shaft. A triangular corner insert plate is fixed to the end of the upper mounting arm away from the corner insert shaft, and a vertically arranged corner insert drive shaft is fixed to the end of the lower mounting arm away from the corner insert shaft. The corner insertion mechanism also includes a corner insert control rail located below the corner insert drive shaft. A circumferentially closed corner insert control surface is provided on the upper surface of the control rail body. The corner insert control surface includes a straight segment of the control surface extending in the front-to-back direction and an arc segment of the control surface located at the end of the control rail body. The straight segment and the arc segment of the control surface are connected by a transition surface.

[0008] Furthermore, the arc segment of the control surface is located at the end of the control track body.

[0009] Furthermore, the front and rear corner plug-ins are arranged symmetrically.

[0010] Furthermore, the upper mounting arm is perpendicular to the corner plug pivot, and the lower mounting arm is also perpendicular to the corner plug pivot, with the upper and lower mounting arms having different orientations.

[0011] Furthermore, the control track itself has a waist-shaped structure.

[0012] The beneficial effects of this technical solution are as follows: During use, the product wrapped in a packaging bag is conveyed in the front-to-back direction between the left and right conveying troughs. Simultaneously, the corner insert drive shaft and the straight section of the control surface guide movement, causing the triangular corner plates of the front and rear corner inserts to press against the end of the packaging bag, thus forming the corner insertion position at the end of the packaging bag. After end sealing, the corner insert drive shaft moves along the transition surface to the arc section of the control surface. Driven by the corner insert drive shaft, the front and rear corner inserts rotate, and the triangular plates move away from their corresponding corner positions, preventing the triangular plates from affecting the conveying of the packaging bag. In this invention, the rear corner insert moves with the conveying mechanism, and its posture changes during movement through the cooperation of the corner insert drive shaft and the corner insert control track, thus providing a corner insertion mechanism adapted to continuous packaging bag production. Attached Figure Description

[0013] Figure 1 This is a usage diagram of an embodiment of the corner insertion mechanism in the production of packaging bags according to this utility model;

[0014] Figure 2 This is a schematic diagram of the differential wheel system ultrasonic end-sealing mechanism in Example 1;

[0015] Figure 3 for Figure 2 A stereoscopic view from one perspective;

[0016] Figure 4 for Figure 2 A three-dimensional image from another perspective;

[0017] Figure 5 yes Figure 2 BB-direction sectional view;

[0018] Figure 6 yes Figure 2 Sectional view along axis AA;

[0019] Figure 7 yes Figure 2 A schematic diagram showing the connection between the ultrasonic transducer and the welding head beam.

[0020] Figure 8 yes Figure 2 Schematic diagram of the midsole mold;

[0021] Figure 9 yes Figure 2 Side view;

[0022] Figure 10 yes Figure 1 Another structural diagram from a different perspective;

[0023] Figure 11 yes Figure 1 A schematic diagram showing the interaction between the welding head turntable on the left side and its upper planetary gear and upper center gear;

[0024] Figure 12 This is a schematic diagram illustrating the packaging principle of the packaging machine in this utility model for packaging materials;

[0025] Figure 13 This is a schematic diagram of the packaging bag conveying mechanism in this utility model;

[0026] Figure 14 yes Figure 13 A structural diagram from another perspective;

[0027] Figure 15 yes Figure 13 A schematic diagram showing the connection between two adjacent conveying channels;

[0028] Figure 16 yes Figure 15 A structural diagram from another perspective;

[0029] Figure 17 yes Figure 13 Schematic diagram of the structure of the center-gap adjustment track;

[0030] Figure 18 yes Figure 17 A three-dimensional image;

[0031] Figure 19 yes Figure 17 A schematic diagram of the structure on the other side;

[0032] Figure 20 yes Figure 17 A three-dimensional image;

[0033] Figure 21 yes Figure 13 Schematic diagram of the structure of the center-angle insertion control track;

[0034] Figure 22 yes Figure 21 A three-dimensional image;

[0035] Figure 23This is a schematic diagram showing the cooperation between the conveyor frame, conveyor wheel, and conveyor trough in the packaging bag conveying mechanism of this utility model;

[0036] Figure 24 This is a schematic diagram showing the connection between the two conveyor channels and the packaging bag;

[0037] Figure 25 yes Figure 24 CC-direction sectional view;

[0038] Figure 26 yes Figure 24 A three-dimensional image;

[0039] Figure 27 This is a schematic diagram of the cooperation between two adjacent racks in the packaging bag conveying mechanism of this utility model;

[0040] Figure 28 This is a schematic diagram of the front corner plug-in in this utility model;

[0041] Figure 29 This is a schematic diagram of the structure of the rear corner plug in this utility model;

[0042] Figure 30 This is a schematic diagram of the fit between the ultrasonic transducer and the welding head in this utility model;

[0043] Figure 31 yes Figure 8 A three-dimensional image;

[0044] Figure 32 yes Figure 30 Schematic diagram of the structure of the serrated cutter;

[0045] Figure 33 yes Figure 31 A schematic diagram showing the fit between the serrated cutter and the cutter channel;

[0046] Figure 34 This is a schematic diagram of the fit between the height adjustment pin and the height adjustment groove in this utility model;

[0047] In the diagram: 1. Conveyor frame; 2. Left conveyor mechanism; 3. Right conveyor mechanism; 4. Mechanism frame; 5. Left welding head turntable; 6. Upper transmission disc; 7. Conveyor trough; 8. Main drive motor; 9. Attitude adjustment motor; 10. First planetary transmission belt; 11. Right welding head turntable; 12. Right second transmission belt; 13. Right first transmission belt; 14. Lower transmission wheel; 15. Second planetary transmission belt; 16. Left first transmission belt; 17. Left second transmission belt 18. Left bottom mold turntable; 19. Right bottom mold turntable; 20. Ultrasonic welding head; 21. Welding head mounting beam; 22. Upper center wheel; 23. Lower center wheel; 24. Upper planetary gear; 25. Lower planetary gear; 26. Turntable bracket; 27. Wedge block; 28. Ultrasonic transducer; 29. ​​Welding head; 30. Amplifier; 31. Upper buffer spring; 32. Beam connecting arm; 33. Lower buffer spring; 34. Bottom mold beam; 35. Drive cylinder; 36. Serrated cutter; 37. Bottom mold; 38. Bottom mold mating surface; 39. Drive gear; 40. Transmission gear; 41. Front swing arm; 42. Rear swing arm; 43. Front rack; 44. Rear rack; 45. Height adjustment pin; 46. Height adjustment vertical rod; 47. Rack bracket; 48. Rack and pinion; 49. Front hinge rod; 50. Rear hinge rod; 51. Hinge rod hinge shaft; 52. Angle insert; 53. Angle insert drive shaft; 54. Triangular angle insert plate 55. Spacing adjustment track; 56. Height adjustment groove; 57. Corner plug control track; 58. Corner plug control surface; 59. Packaging bag; 60. Front corner plug; 61. Rear corner plug; 62. Hinge hole; 63. Corner plug pivot; 64. Cutter clearance groove; 65. Welding part; 66. Cutter channel; 67. Straight section of control surface; 68. Curved section of control surface; 69. Transition surface; 70. Common shaft; 71. Low section; 72. High section; 73. Plug corner position. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0052] An embodiment of the corner-insertion mechanism in the production of packaging bags in this utility model is as follows: Figures 1-34 As shown,

[0053] In this embodiment Figure 1 It involves an ultrasonic end-sealing mechanism and an insertion mechanism for differential gear trains, and the two mechanisms are used in conjunction.

[0054] The corner-insertion mechanism is a packaging bag conveying mechanism that can adjust the spacing of the conveyed bags. The packaging bag conveying mechanism includes a conveyor frame 1, on which a left conveying mechanism 2 and a right conveying mechanism 3 are arranged symmetrically. Both the left conveying mechanism 2 and the right conveying mechanism 3 include drive gears 39 whose axes extend in the vertical direction. The drive gear 39 located at the front is called the front drive gear, and the drive gear located at the rear is called the rear drive gear. The two front drive gears or the two rear drive gears are active gears driven by a power motor. The two front drive gears have the same rotation speed and rotate in opposite directions.

[0055] The left and right conveying mechanisms are arranged symmetrically, therefore, this utility model only describes the structure of one side of the conveying mechanism in detail.

[0056] Taking the left-side conveying mechanism as an example, the left-side conveying mechanism includes multiple output slots 7 spaced circumferentially. The conveying slots 7 are generally U-shaped. Transmission teeth 40 are provided at the bottom of the bottom plate of the conveying slot 7. Two adjacent conveying slots are defined as the front conveying slot and the rear conveying slot. The transmission teeth on the front conveying slot are called front transmission teeth, and the transmission teeth on the rear conveying slot are called rear transmission teeth. The transmission teeth 40 are used to mesh with the corresponding drive gears. In this invention, whether it is the front transmission teeth or the rear transmission teeth, the drive gear simultaneously meshes with at least two adjacent transmission teeth.

[0057] The connection between the front conveyor trough and the rear conveyor trough is as follows: Figures 15-16 As shown:

[0058] On the bottom plates of the front and rear conveying troughs, rocker arms are hinged to the front and rear sides of the corresponding transmission racks. The hinge axis of the rocker arms extends in the vertical direction. The adjacent rocker arms on the front and rear conveying troughs are called the front rocker arm 41 and the rear rocker arm 42, respectively. The upper end of the front rocker arm 41 is hinged to the front rack 43 with its axis extending in the vertical direction. The upper end of the rear rocker arm 42 is hinged to the rear rack 44 with its axis extending in the vertical direction. The adjacent ends of the front rack 43 and the rear rack 44 are mounted on the rack bracket 47. The rack bracket is a sleeve-shaped structure. Inside the rack bracket, rack gears 48 are arranged on the opposite sides of the front rack and the rear rack. The opposite sides of the rack gears 48 mesh with the front rack 43 and the rear rack 44, respectively, for transmission. By cooperating with the rack and pinion, the initial distance between two adjacent conveying grooves can be adjusted, while ensuring the consistency of the movement of the front swing arm 43 and the rear swing arm 44.

[0059] A height adjustment rod 46 is slidably mounted on the center of the rack and pinion gear along the vertical direction. The upper and lower ends of the height adjustment rod 46 protrude from the upper and lower ends of the rack bracket. A horizontally arranged height adjustment pin 45 is fixed to the upper end of the height adjustment rod 46. A hinge rod hinge shaft 51 is fixed to the bottom of the height adjustment rod 46.

[0060] A front hinge rod 49 with its axis arranged horizontally is also hinged to the front conveying trough, and a rear hinge rod 50 with its axis arranged horizontally is also hinged to the rear conveying trough. The adjacent ends of the front hinge rod 49 and the rear hinge rod 50 are provided with hinge holes arranged on the same axis. The hinge shaft 51 of the hinge rod is inserted into the hinge hole. The length of the hinge hole is shorter than the length of the hinge shaft of the hinge rod. Therefore, the front hinge rod 49 and the rear hinge rod 50 can move upward relative to the hinge shaft of the hinge rod in the axial direction of the hinge shaft.

[0061] A spacing adjustment track 55 is fixed on the conveyor frame. The spacing adjustment track includes a waist-shaped adjustment track body. A height adjustment groove 56, enclosed circumferentially, is provided on the outer surface of the adjustment track body. The bottom of the height adjustment groove faces upwards, and the bottom of the height adjustment pin 45 at the upper end of the height adjustment vertical rod 46 slides in contact with the bottom of the height adjustment groove 56. The height adjustment groove has a low section 71 and a high section 72 along its entire circumference. When the height adjustment pin 45 slides to the high section 72, the height adjustment vertical rod pulls the adjacent ends of the front and rear hinge rods upwards via the hinge shaft, bringing them closer to the horizontal position of the front and rear hinge rods. This increases the spacing between adjacent front output grooves and rear conveying grooves. When the height adjustment pin 45 slides to the low section, under its own weight (or spring), the adjacent ends of the front and rear hinge rods move downwards, such as... Figure 24 As shown, the distance between two adjacent front output slots and rear output slots will become smaller, which means that the distance between two adjacent packaging bags is shortened, making it easier to perform ultrasonic end-sealing operations.

[0062] During ultrasonic end sealing, a corner insertion position 73 needs to be formed at the end of the packaging bag. To achieve this function, the corner insertion mechanism also includes a corner insert 52 set at the corresponding position of the conveying trough. In this embodiment, the corner insert includes a front corner insert 60 hinged to the rear end of the front conveying trough and a rear corner insert 61 hinged to the front end of the rear conveying trough. The front corner insert 60 and the rear corner insert 61 are as follows: Figure 28 , Figure 29 As shown, both the front corner plug 60 and the rear corner plug 61 include a corner plug shaft 63, an upper mounting arm fixed to the upper end of the corner plug shaft, and a lower mounting arm fixed to the lower end of the corner plug shaft. The upper mounting arm is perpendicular to the corner plug shaft 63, and the lower mounting arm is also perpendicular to the corner plug shaft. The upper and lower mounting arms have different orientations. A triangular corner plate 54 is fixed to the end of the upper mounting arm away from the corner plug shaft; a vertically arranged corner plug drive shaft 53 is fixed to the end of the lower mounting arm away from the corner plug shaft.

[0063] An angle insertion control rail 57 is fixed on the conveyor frame and located below the spacing adjustment rail. The angle insertion control rail 57 includes a waist-shaped control rail body. A circumferentially closed angle insertion control surface 58 is provided on the upper end surface of the control rail body. The angle insertion control surface 58 includes a straight control surface segment 67 extending in the front-back direction and an arc control surface segment 68 provided at the end of the control rail body. The straight control surface segment 67 and the arc control surface segment 68 are connected by a transition surface 69.

[0064] When the packaging bag enters the ultrasonic end-sealing position, the lower ends of the corner drive shafts 53 of the front corner insert 60 and the rear corner insert 61 slide and engage with the straight section 67 of the control surface. At this time, as... Figure 25As shown, the triangular corner inserts 54 of the front and rear corner inserts are pressed into the end of the packaging bag, thus forming the corner insert structure of the packaging bag. After ultrasonic end-face sealing, as the packaging bag continues to be conveyed, the corner insert drive shaft 53 of the corresponding corner insert will move through the transition surface 69 to the arc segment 68 of the control surface. During this process, under the pushing action of the corner insert control track 57, the front corner insert 60 and the rear corner insert 61 will swing around their own rotation axis, so that the triangular corner insert 54 of the front corner insert rotates out from the corresponding corner insert structure of the packaging bag, and the triangular corner insert of the rear corner insert rotates out from the corresponding corner insert structure of the packaging bag, avoiding the triangular corner inserts from hooking the corner position at the arc position at the exit position, i.e., at both ends of the corner insert control track. As they move along the waist-shaped track, they disengage from the corner position 73 of the packaging bag. Specifically, Figure 25 From the perspective, the front corner insert 60 rotates clockwise, causing the triangular insert plate to move away from the corner position 73 of the packaging bag.

[0065] The differential wheel system ultrasonic end sealing mechanism includes a frame, on which ultrasonic welding head mechanism and bottom mold mechanism are arranged vertically.

[0066] For the ultrasonic welding head mechanism, it includes a left welding head turntable 5 and a right welding head turntable 11 arranged at intervals. The left welding head turntable 5 and the right welding head turntable 11 are driven by a turntable drive mechanism to rotate synchronously. For the bottom mold mechanism, it includes a left bottom mold turntable 18 and a right bottom mold turntable 19 arranged at intervals. The left bottom mold turntable 18 and the right bottom mold turntable 19 are also driven by a turntable drive mechanism, thereby realizing that the left welding head turntable 5, the right welding head turntable 11, the left bottom mold turntable 18, and the right bottom mold turntable 19 rotate at the same speed, the left welding head turntable rotates in the opposite direction to the left bottom mold turntable, and the right welding head turntable rotates in the opposite direction to the right bottom mold turntable.

[0067] In this embodiment, the turntable drive mechanism includes a main drive motor 8. The left welding head turntable 5 and the left bottom mold turntable 18 are connected by a left first transmission belt 16; the right welding head turntable 11 and the right bottom mold turntable 19 are connected by a right first transmission belt 13. The main drive motor 8 is connected to the left first transmission belt 16 and the right first transmission belt 13 via a drive shaft.

[0068] The ultrasonic welding head mechanism also includes three circumferentially spaced ultrasonic welding heads 20, each mounted on a corresponding welding head mounting beam 21. Each ultrasonic welding head 20 includes a welding head 29 and an ultrasonic transducer 28 and an amplitude transformer 30 connected to it. The welding head 29 has a cutting groove 64, with welding portions 65 formed on both sides of the cutting groove 64. An upper buffer spring 31 is provided between the welding head mounting beam 21 and the ultrasonic welding head 20.

[0069] Rotating shafts for connecting to the ends of the corresponding welding head mounting beams are rotatably mounted on the left welding head turntable 5 and the right welding head turntable 11. Upper planetary gears 24 are fixed on the rotating shafts. The upper planetary gears 24 on the same welding head turntable are connected by a first planetary gear transmission belt 10. The mechanism frame is also equipped with an attitude adjustment mechanism that is connected to the corresponding upper planetary gears 24. During the rotation of the welding head mounting beam 21 with the left welding head turntable 5 and the right welding head turntable 11, the axis of the ultrasonic transducer 28 is vertically downward. The welding head of the ultrasonic welding head mechanism, which is rotated to the lowest position, cooperates with the corresponding bottom mold mechanism to complete the end sealing of the packaging bag.

[0070] In this embodiment, an upper center wheel 22 is rotatably mounted at the center position of the left and right welding head turntables. The upper center wheel 22 is connected to the corresponding first planetary gear transmission belt 10. An upper transmission disc 6 is fixed coaxially on the upper center wheel 22. The attitude adjustment mechanism is connected to the corresponding upper planetary gear 24 through the upper transmission disc 6, the upper center wheel 22 and the first planetary gear transmission belt 10.

[0071] The bottom mold mechanism includes a bottom 37 corresponding to the number of ultrasonic welding heads. Lower planetary gears 25 corresponding to the number of bottom molds are rotatably mounted on the left bottom mold turntable 18 and the right bottom mold turntable 19. The bottom mold is mounted on the bottom mold crossbeam 34. The two ends of the bottom mold crossbeam 34 are connected to the corresponding lower planetary gears 25. The lower planetary gears 25 of the same bottom mold turntable are connected to each other through the second planetary gear transmission belt 15. The bottom mold has a bottom mold mating surface 38 that mates with the corresponding welding head. During the rotation of the bottom mold with the left bottom mold turntable and the right bottom mold turntable, the bottom mold mating surface 38 faces upward.

[0072] The bottom mold has a cutting channel 66 at its center, and a serrated cutter 36 that can move up and down is provided in the cutting channel 66. The serrated cutter 36 is driven by a drive cylinder 35 to move up and down.

[0073] The left bottom mold turntable 18 and the right bottom mold turntable 19 are equipped with a lower center wheel 23 that rotates around the center. The lower center wheel 23 is connected to the corresponding second planetary gear by a transmission belt 15. A lower transmission wheel 14 is fixed on the lower center wheel 23 along the same axis. The attitude adjustment mechanism is connected to the upper and lower center wheels on the left side by a second transmission belt 17 on the left side. The attitude adjustment mechanism is connected to the upper and lower center wheels on the right side by a second transmission belt 12 on the right side.

[0074] In this embodiment, the attitude adjustment mechanism includes an attitude adjustment motor 9, which is connected to the left second transmission belt 17 and the right second transmission belt 12 via a transmission shaft. In this embodiment, a common shaft 70 extending along its axis in the left-right direction is provided on the mechanism frame. Reversing gears are rotatably mounted at both ends of the common shaft 70. The left first transmission belt 16 is reversed via one of the reversing gears, and the left second transmission belt 17 is reversed via the other reversing gear. There are two common shafts between the left first transmission belt and the left second transmission belt, arranged with a front-to-back gap. Similarly, there are two common shafts between the right first transmission belt and the right second transmission belt, also arranged with a front-to-back gap.

[0075] During normal operation, the output shaft of the attitude adjustment motor is locked, the planetary gears are driven by the center gear with equal number of teeth, and the ultrasonic welding head always maintains a vertical posture. When the ultrasonic welding head rotates to the lowest position, it cooperates with the bottom mold to complete the end sealing of the packaging bag. As the packaging bag continues to be conveyed, each ultrasonic welding head rotates in sequence to complete the ultrasonic sealing of the corresponding packaging bag. The rotation direction of the left welding head turntable and the right welding head turntable is consistent and continuous, which can improve the sealing efficiency.

[0076] The usage process of this packaging machine is as follows: Figure 12 As shown: After the material is unwound from the film, it is longitudinally sealed. The longitudinally sealed material is then conveyed between the left and right conveying mechanisms. Each piece of material is held in place by the conveying grooves between the left and right conveying mechanisms. During this process, under the action of the corner insert control track, the triangular corner plates of the front and rear corner inserts press against the packaging bag, forming corner insert structures at both ends of the packaging bag. Figure 12 As the packaging bag continues to be conveyed, when it reaches the station of the differential wheel system ultrasonic end-sealing mechanism, the height adjusting pin engages with the lower section of the height adjusting groove. Under its own weight, the adjacent ends of the front and rear hinge rods descend, as shown in the image. Figure 24 As shown, the distance between two adjacent front output slots and rear output slots will decrease, thereby pulling two adjacent packaging bags closer together. Figure 12 The reduced pitch in the middle prepares for ultrasonic encapsulation. Then, the ultrasonic welding head cooperates with the bottom mold to complete the end sealing of the packaging bag. Figure 12 The ultrasonic horizontal sealing process involves a serrated cutter that then moves upwards to cut two adjacent bags, corresponding to... Figure 12 During the cutting process, as the conveying continues, when the height adjusting pin engages with the higher section of the height adjusting groove, the adjacent ends of the front and rear hinge rods move upwards, widening the distance between adjacent front and rear output grooves. This results in the widening of the distance between adjacent packaging bags. Figure 12 The extended distance in the middle.

[0077] When the conveying trough moves to the arc-shaped section of the drive gears at both ends of the conveying mechanism, the adjacent ends of the front hinge rod and the rear hinge rod move downward under the action of the height adjustment groove, and the distance between the two adjacent conveying troughs gets closer, which facilitates the passage through the arc-shaped section at both ends of the conveying mechanism. During this process, the front swing rod and the rear swing rod swing to make adaptive adjustments. At the same time, the front hinge rod 49 and the rear hinge rod 50 can move upward relative to the hinge shaft axis to prevent the parts from getting stuck.

[0078] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A corner insertion mechanism in packaging bag production, comprising a left conveying mechanism and a right conveying mechanism, wherein both the left and right conveying mechanisms include multiple conveying grooves spaced apart circumferentially, and two adjacent conveying grooves in the front-to-back direction are referred to as the front conveying groove and the rear conveying groove, characterized in that: The rear end of the front conveying trough is hinged with a front corner insert, and the front end of the rear conveying trough is hinged with a front corner insert. Both the front and rear corner inserts include a corner insert shaft. An upper mounting arm is fixed to the upper end of the corner insert shaft, and a lower mounting arm is fixed to the lower end of the corner insert shaft. A triangular corner plate is fixed to the end of the upper mounting arm away from the corner insert shaft, and a vertically arranged corner insert drive shaft is fixed to the end of the lower mounting arm away from the corner insert shaft. The corner insert mechanism also includes a corner insert control rail located below the corner insert drive shaft. A circumferentially closed corner insert control surface is provided on the upper surface of the control rail body of the corner insert control rail. The corner insert control surface includes a straight segment of the control surface extending in the front-rear direction and an arc segment of the control surface located at the end of the control rail body. The straight segment and the arc segment of the control surface are connected by a transition surface.

2. The insertion mechanism according to claim 1, characterized in that: The arc segment of the control surface is located at the end of the control track body.

3. The corner insertion mechanism according to claim 1, characterized in that: The front and rear corner plug-ins are arranged symmetrically.

4. The corner insertion mechanism according to claim 1, characterized in that: The upper mounting arm is perpendicular to the corner plug hinge, and the lower mounting arm is also perpendicular to the corner plug hinge. The upper and lower mounting arms have different orientations.

5. The corner insertion mechanism according to any one of claims 1 to 4, characterized in that: The control track body has a waist-shaped structure.

Images