Packaging bag sealing device

Abstract

The present invention provides a packaging bag sealing device, comprising a packaging frame, a bag-supporting mechanism, a pin mechanism and a sealing device, wherein the packaging frame comprises a support arm corresponding to the opening of the packaging bag, and the opening of the packaging bag is supported to a square opening by the support arm; the pin mechanism comprises a left pin member and a right pin member symmetrically arranged, and respectively corresponding to the two sides of the packaging bag; the sealing device comprises an upper sealing member and a lower sealing member arranged in a positive correspondence in the Z-axis direction, and seals the opening of the packaging bag at the upper and lower parts of the packaging bag; the support arm and the pin member are both located between the upper sealing member and the lower sealing member. The present invention has a simple structure and is easy to operate. During the sealing process, the side portion of the packaging bag is gradually retracted to the middle of the packaging bag as the left pin member and the right pin member move toward each other, and no manual sealing is required, thereby improving work efficiency and ensuring sealing quality.

Description

Technical Field

[0001] The invention relates to the technical field of packaging mechanisms, and in particular to a packaging bag sealing device. Background Art

[0002] Packaging bags refer to bags used to package various items, making it easy to transport and store goods during production and circulation. The main types of bags are: three-side sealed bags (palm-sealed bags), back-sealed bags, folded bags (accordion bags), upright bags, etc. Since most packaging bags are made of plastic materials, they need to be sealed or sealed during production or packaging of products. However, when sealing an accordion bag, the bag needs to be stretched out in a direction, then pushed from both sides of the bag to the middle, and then pressed and sealed.

[0003] However, the more conventional packaging method currently is to use the traditional manual sealing method, which involves manually opening the packaging bag and then folding the two sides of the bag toward the middle of the bag, and then sealing the opening of the packaging bag by heat sealing with a sealing machine, which has low work efficiency and high labor costs. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a packaging bag sealing device which has a simple structure and can quickly and conveniently seal the opening of the packaging bag, thereby improving work efficiency, reducing manual operations and improving the degree of automation.

[0005] In order to solve the above technical problems, the present invention provides a packaging bag sealing device, comprising a packaging frame;

[0006] A bag-opening mechanism, used for opening the packaging bag, the bag-opening mechanism is installed on one side of the packaging frame along the Y-axis direction, the packaging frame includes an opening arm corresponding to the opening of the packaging bag, and the opening of the packaging bag is opened to a square opening by the opening arm;

[0007] A pin mechanism is installed on the packaging frame along the X-axis direction, and the pin mechanism includes a left pin member and a right pin member that are symmetrically arranged, and the left pin member and the right pin member correspond to two sides of the packaging bag respectively;

[0008] A sealing device is installed on the packaging frame, the sealing device includes an upper sealing member and a lower sealing member which are arranged in a corresponding manner in the Z-axis direction, and synchronously moves back and forth in the Z-axis direction to seal the opening of the packaging bag at the upper and lower parts of the packaging bag; the opening arm and the pin member are both located between the upper sealing member and the lower sealing member;

[0009] The bag-supporting mechanism, the pin-inserting mechanism and the sealing device work independently, and the side edge of the packaging bag is gradually stored in the middle of the packaging bag as the left pin member and the right pin member move toward each other.

[0010] Furthermore, the bag-opening mechanism further includes a left moving part and a right moving part distributed along the X-axis direction, and four opening arms are provided, two of which are provided on the left moving part and the right moving part, respectively, and the two opening arms on the left moving part are symmetrical with the two opening arms on the right moving part; the left moving part and the right moving part move synchronously in opposite directions or towards each other;

[0011] The two spreading arms on the left movable part and the two spreading arms on the right movable part are symmetrically distributed up and down; the two spreading arms on the left movable part move synchronously in opposite directions or towards each other in the vertical direction, and the two spreading arms on the right movable part move synchronously in opposite directions or towards each other in the vertical direction.

[0012] Furthermore, the left moving part and the right moving part each include a bottom plate, a vertical rotating rod and a first driving motor for driving the vertical rotating rod to rotate, the vertical rotating rod is mounted on the bottom plate, and two moving blocks for mounting the spreading arm are threadedly connected to the vertical rotating rod;

[0013] The two moving blocks move synchronously in opposite directions or towards each other in the vertical direction;

[0014] The bottom plate is provided with a vertical slide rail corresponding to the vertical rotating rod, and the two moving blocks are both slidably connected to the vertical slide rail.

[0015] Furthermore, the bag-opening mechanism also includes a pushing unit that drives the opening arm to move back and forth toward the opening of the packaging bag; the pushing unit includes a moving part that moves along the Y-axis direction and a shell fixed on the packaging frame, and the moving part is provided with a mounting plate that moves synchronously with it, and the left moving part and the right moving part are both slidably mounted on the mounting plate.

[0016] Furthermore, the mounting plate is provided with a first transverse guide rail and a first transverse rotation rod extending along the X-axis, and the mounting plate is also provided with a second driving motor that drives the first transverse rotation rod to rotate;

[0017] The left moving part and the right moving part are both threadedly connected to the first transverse rotating rod and are slidably connected to the first transverse guide rail. The left moving part and the right moving part move synchronously in opposite directions or towards each other on the first transverse rotating rod along the first transverse guide rail.

[0018] Furthermore, the pin mechanism includes a crossbeam fixed on the packaging frame along the X-axis direction, a second transverse rotation rod and a second transverse guide rail fixed on the crossbeam are provided below the crossbeam, two pin sliders are threadedly connected to the second transverse rotation rod, and the pin sliders are also slidably connected to the second transverse guide rail, and the two pin sliders are respectively used to install the left pin piece and the right pin piece.

[0019] Furthermore, the left pin member and the right pin member both include a pressing portion extending along the X-axis direction, and the pressing portion of the left pin member and the pressing portion of the right pin member are arranged facing each other.

[0020] Further, a pulley group moving along the Z-axis direction is respectively provided on the left and right sides of the packaging frame, and the two pulley groups each include a belt that reciprocates in the Z-axis direction, and both ends of the upper sealing member and the lower sealing member are respectively fixed on the belts of the two pulley groups;

[0021] The upper sealing member and the lower sealing member are provided with mutually matching corrugated pressing parts on their corresponding surfaces, and the pressing parts extend along the Y-axis direction;

[0022] The packaging frame is also provided with a synchronous connecting shaft for connecting the two pulley groups for synchronous rotation, and one end of the synchronous connecting shaft is transmission-connected to the main driving motor.

[0023] Furthermore, the end of the spreading arm includes a horizontally arranged U-shaped spreading portion.

[0024] Furthermore, a guide rail extending along the Z-axis direction is respectively provided on the left and right sides of the packaging frame; and guide sliders for sliding connection to the guide rails are fixed to both ends of the upper sealing member and the lower sealing member.

[0025] Compared with the related art, the present invention has the following beneficial effects:

[0026] The present invention provides a packaging bag sealing device with a simple structure. The left moving part and the right moving part of the bag supporting mechanism are inserted into the opening of the packaging bag and move to both sides of the packaging bag opening. At the same time, the upper and lower spreading arms on the left moving part and the right moving part move back to each other in the vertical direction. The four spreading arms move in two directions at the same time, so that the opening of the packaging bag is spread into a square opening. Then, the left pin piece and the right pin piece of the pin mechanism move toward the middle of the packaging bag at the same time, and the four spreading arms are reset synchronously to fold the packaging bag that is spread into a square opening into an accordion-type opening. Finally, the upper sealing piece and the lower sealing piece of the sealing device are pressed on the upper and lower sides of the packaging bag opening to complete the sealing. The sealing effect is good, no manual operation is required, the degree of automation is improved, the work efficiency is high, the flatness of the seal is guaranteed, and the packaging quality is guaranteed.

[0027] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a preferred embodiment provided by the present invention;

[0030] Figure 2 A schematic diagram from another perspective of a preferred embodiment provided by the present invention;

[0031] Figure 3 for Figure 2 Enlarged view of part A;

[0032] Figure 4 A schematic diagram of the bag-supporting mechanism provided by the present invention;

[0033] Figure 5 A schematic diagram of the installation of the left moving part / right moving part provided by the present invention;

[0034] Figure 6 A schematic diagram of the pin mechanism provided by the present invention;

[0035] Figure 7 This is a schematic diagram of the installation of the sealing device provided by the present invention.

[0036] Numbers in the figure:

[0037] 1. Packaging frame; 2. Bag support mechanism; 201. Bottom plate; 202. Vertical rotating rod; 203. First driving motor; 204. Moving block; 205. Vertical slide rail; 21. Spreading arm; 22. Left moving part; 23. Right moving part; 210. U-shaped spreading part; 3. Pin mechanism; 31. Left pin member; 32. Right pin member; 301. Crossbeam; 302. Second horizontal rotating rod; 303. Second horizontal guide rail; 304. Pin mechanism Foot slider; 305, third drive motor; 306, pressing part; 4, sealing device; 41, upper sealing member; 42, lower sealing member; 5, pushing unit; 51, moving part; 52, shell; 53, mounting plate; 54, first transverse guide rail; 55, first transverse rotating rod; 56, second drive motor; 6, pulley set; 61, belt; 62, synchronous connecting shaft; 63, main drive motor; 64, guide rail; 65, guide slider. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Please refer to Figure 1-Figure 7 As shown, a packaging bag sealing device comprises a packaging frame 1, a bag-holding mechanism 2, a pin mechanism 3 and a sealing device 4, wherein the bag-holding mechanism 2 is used to hold open the opening of a packaging bag (not shown in the figure), the bag-holding mechanism 2 is mounted on one side of the packaging frame 1 along the Y-axis direction, the packaging frame 1 comprises a holding arm 21 corresponding to the opening of the packaging bag, and the opening of the packaging bag is held open to a square opening by the holding arm 21;

[0040] The pin mechanism 3 is installed on the packaging frame 1 along the X-axis direction, and the pin mechanism 3 includes a left pin member 31 and a right pin member 32 that are symmetrically arranged, and the left pin member 31 and the right pin member 32 correspond to the two sides of the packaging bag respectively;

[0041] The sealing device 4 is installed on the packaging frame 1, and includes an upper sealing member 41 and a lower sealing member 42 which are arranged correspondingly in the Z-axis direction, and synchronously make reverse reciprocating movements in the Z-axis direction to seal the opening of the packaging bag at the upper and lower parts of the packaging bag; the opening arm 21, the left pin member 31 and the right pin member 32 are all located between the upper sealing member 41 and the lower sealing member 42;

[0042] The bag-supporting mechanism 2, the pin mechanism 3 and the sealing device 4 work independently, and the side portions of the packaging bag are gradually stored in the middle of the packaging bag as the left pin member 31 and the right pin member 32 move toward each other.

[0043] When sealing the packaging bag, the opening arms 21 of the bag-opening mechanism 2 are simultaneously opened and moved in two directions, so that the opening of the packaging bag is opened into a square opening, and then the left pin member 31 and the right pin member 32 of the pin mechanism 3 are simultaneously moved toward the middle of the packaging bag, and the four opening arms 21 are synchronously reset and moved, so that the packaging bag opened into a square opening is folded into an accordion-like opening, and finally the upper sealing member 41 and the lower sealing member 42 of the sealing device 4 are pressed on the upper and lower sides of the packaging bag opening to complete the sealing, with good sealing effect and no manual operation required.

[0044] Among them, in order to realize that the opening arm 21 provided on the bag-holding mechanism 2 can open the opening of the packaging bag into a square opening, the bag-holding mechanism 2 also includes a left movable part 22 and a right movable part 23 distributed along the X-axis direction, and four opening arms 21 are provided. Two opening arms 21 are respectively provided on the left movable part 22 and the right movable part 23, and the two opening arms 21 located on the left movable part 22 are symmetrical with the two opening arms 21 located on the right movable part; the left movable part 22 and the right movable part 23 move synchronously in opposite directions or towards each other, that is, the left movable part 22 and the right movable part 23 can approach each other or deviate from each other;

[0045] The two opening arms 21 on the left moving part 22 and the two opening arms 21 on the right moving part 23 are symmetrically distributed up and down; the two opening arms 21 on the left moving part 22 move synchronously in opposite directions or toward each other in the vertical direction, and the two opening arms 21 on the right moving part 23 move synchronously in opposite directions or toward each other in the vertical direction. The opening arms 21 of the bag-opening mechanism 2 are inside the opening of the packaging bag, and the ends of the opening arms 21 include a horizontally arranged U-shaped opening portion 210. By moving the left moving part 22 and the right moving part 23 away from each other, and at the same time moving the upper and lower opening arms 21 on the left moving part 22 and the right moving part 23 away from each other, the opening of the packaging bag is opened into a square opening.

[0046] Specifically, the left moving part 22 and the right moving part 23 each include a bottom plate 201, a vertical rotating rod 202 and a first driving motor 203 for driving the vertical rotating rod 202 to rotate, the vertical rotating rod 202 is mounted on the bottom plate 201, and two moving blocks 204 for mounting the spreading arm 21 are threadedly connected to the vertical rotating rod 202;

[0047] The two moving blocks 204 move synchronously in opposite directions or towards each other in the vertical direction; the upper and lower parts of the vertical rotating rod 202 have two oppositely arranged thread segments, and the two moving blocks 204 are respectively located on different thread segments; the left moving part 22 and the right moving part 23 both drive the vertical rotating rod 202 to rotate through their respective first driving motors 203, and the moving block 204 moves on the vertical rotating rod 202 through the rotation of the vertical rotating rod 202, so that the two spreading arms 21 on the left moving part 22 move close to or away from each other in the vertical direction, and the two spreading arms 21 on the right moving part 23 move synchronously in the vertical direction.

[0048] In addition, a vertical slide rail 205 corresponding to the vertical rotating rod 202 is provided on the bottom plate 201, and the two moving blocks 204 are slidably connected to the vertical slide rail 205, ensuring the vertical movement stability of the spreading arms 21 on the left moving part 22 and the right moving part 23, and ensuring the movement accuracy.

[0049] For example Figure 4 and Figure 5 As shown, in this embodiment, in order to realize that the opening arm 21 of the bag-holding mechanism 2 can be inserted into the packaging bag from the opening of the packaging bag, and withdrawn from the opening of the packaging bag. The bag-holding mechanism 2 also includes a pushing unit 5 that drives the opening arm 21 to move back and forth toward the opening of the packaging bag; the pushing unit 5 includes a moving part 51 that moves along the Y-axis and a shell 52 fixed on the packaging frame 1, and the moving part 51 is provided with a mounting plate 53 that moves synchronously therewith, and the left moving part 22 and the right moving part 23 are both slidably mounted on the mounting plate 53. The pushing unit 5 is mounted on the upper end of the packaging frame 1, the shell 52 is fixed to the upper end of the packaging frame 1, and is extended along the Y-axis direction on one side of the packaging frame 1, the mounting plate 53 is fixed to the moving part 51, and is extended along the X-axis direction, and the left moving part 22 and the right moving part 23 are both hoisted on the mounting plate 53.

[0050] The mounting plate 53 is provided with a first transverse guide rail 54 and a first transverse rotation rod 55 extending along the X-axis, and the mounting plate 53 is also provided with a second driving motor 56 for driving the first transverse rotation rod 55 to rotate;

[0051] The left movable part 22 and the right movable part 23 are both threadedly connected to the first transverse rotation rod 55 and are slidingly connected to the first transverse guide rail 54. The left movable part 22 and the right movable part 23 move synchronously in opposite directions or towards each other on the first transverse rotation rod 55 along the first transverse guide rail 54.

[0052] Specifically, the left section and the right section of the first transverse rotation rod 55 have two threaded sections arranged in opposite directions, and the tops of the bottom plates 201 of the left moving part 22 and the right moving part 23 are both threadedly connected to the first transverse rotation rod 55, and the tops of the bottom plates 201 of the left moving part 22 and the tops of the bottom plates 201 of the right moving part 23 are respectively located on different threaded sections, and at the same time, are both slidably connected to the first transverse guide rail 54. The first transverse rotation rod 55 is driven to rotate by the operation of the second driving motor 56, and the tops of the bottom plates 201 of the left moving part 22 and the tops of the bottom plates 201 of the right moving part 23 move toward or away from each other on the first transverse rotation rod 55 along the first transverse guide rail 54, so that the left moving part 22 and the right moving part 23 move in the X-axis direction, so that the opening arms 21 on the left moving part 22 and the right moving part 23 can be opened to both sides of the packaging bag at the opening of the packaging bag.

[0053] For example Figure 6As shown, in this embodiment, the pin mechanism 3 includes a beam 301 fixed on the packaging frame 1 along the X-axis direction, and a second transverse rotation rod 302 and a second transverse guide rail 303 fixed on the beam 301 are provided below the beam 301. Two pin sliders 304 are threadedly connected to the second transverse rotation rod 302, and the pin sliders 304 are also slidably connected to the second transverse guide rail 303. The two pin sliders 304 are respectively used to install the left pin member 31 and the right pin member 32.

[0054] The left section and the right section of the second transverse rotation rod 302 have two oppositely arranged threaded sections, and the left pin member 31 and the right pin member 32 are respectively located on different threaded sections through the pin sliders 304; the second transverse rotation rod 302 is driven to rotate by the third driving motor 305 on one side of the second transverse rotation rod 302, so that the two pin sliders 304 on the second transverse rotation rod 302 move toward or away from each other along the second transverse guide rail 303, thereby causing the left pin member 31 and the right pin member 32 installed on the two pin sliders 304 to move toward or away from each other.

[0055] In addition, the left pin member 31 and the right pin member 32 both include a pressing portion 306 extending along the X-axis direction, and the pressing portion 306 of the left pin member 31 and the pressing portion 306 of the right pin member 32 are arranged opposite to each other. The bag-opening mechanism 2 opens the opening of the packaging bag into a square opening, and then the left pin member 31 and the right pin member 32 of the pin mechanism 3 move toward each other on both sides of the packaging bag and press the side edges of the packaging bag, so that the side edges of the packaging bag are folded toward the middle of the packaging bag to form an accordion-like opening.

[0056] For example Figure 7 As shown, in this embodiment, in order to realize that the bag opening is folded into an accordion opening through the bag support mechanism 2 and the pin mechanism 3 so that it can be pressed and sealed smoothly, and in the process of sealing the opening of each bag, the upper sealing member 41 and the lower sealing member 42 need to correspond to the upper and lower sides of the bag opening at the same time, perform synchronous sealing, and synchronously deviate from the bag after sealing, so the upper sealing member 41 and the lower sealing member 42 need to move simultaneously. The left and right sides of the packaging frame 1 are respectively provided with a pulley group 6 moving along the Z-axis direction, and the two pulley groups 6 include a belt 61 that reciprocates in the Z-axis direction. The two ends of the upper sealing member 41 and the lower sealing member 42 are respectively fixed on the belts 61 of the two pulley groups 6, and move synchronously with the belts 61;

[0057] Through the forward or reverse rotation of the pulley group 6, the belt 61 moves forward or reverse synchronously, and the upper sealing member 41 and the lower sealing member 42 can approach each other or deviate from each other. When sealing, the upper sealing member 41 and the lower sealing member 42 approach each other until they fit the packaging bag. After sealing is completed, the upper sealing member 41 and the lower sealing member 42 move in the opposite direction through the belt 61 and deviate from the opening of the packaging bag.

[0058] In this embodiment, the packaging frame 1 is further provided with a synchronous connecting shaft 62 for connecting the two pulley sets 6 for synchronous rotation, and one end of the synchronous connecting shaft 62 is drivingly connected to a main driving motor 63 .

[0059] A guide rail 64 extending along the Z-axis direction is also provided on the left and right sides of the packaging frame 1 ; guide sliders 65 slidably connected to the guide rail 64 are fixed to both ends of the upper sealing member 41 and the lower sealing member 42 .

[0060] The corresponding surfaces of the upper sealing member 41 and the lower sealing member 42 are both provided with mutually matching corrugated pressing parts, and the pressing parts are both extended along the Y-axis direction, that is, the same as the extension direction of the packaging bag opening. The corrugated pressing parts on the upper sealing member 41 and the lower sealing member 42 are offset and pressed on the upper and lower sides of the packaging bag opening, so as to facilitate the complete fit of the packaging bag opening. The sealing of the packaging bag by the upper sealing member 41 and the lower sealing member 42 is a conventional technical means in the field, which is not the invention of this application and will not be described here.

[0061] In addition, in order to improve the accuracy of the upper sealing member 41 and the lower sealing member 42 moving along the Z-axis direction on the packaging frame 1, a guide slide rail 64 extending along the Z-axis direction is respectively provided on the left and right sides of the packaging frame 1; both ends of the upper sealing member 41 and the lower sealing member 42 are fixed with a guide slider 65 for sliding connection to the guide slide rail 64. When the upper sealing member 41 and the lower sealing member 42 move, they can move along the guide slide rail 64 through the guide slider 65, thereby improving the sealing accuracy of the packaging bag.

[0062] When in use, the opening of the packaging bag corresponds to the bag-stretching mechanism 2, the moving part 51 of the pushing unit 5 moves, and the left moving part 22 and the right moving part 23 move toward the opening of the packaging bag synchronously, so that the stretching arms 21 on the left moving part 22 and the right moving part 23 are both extended into the opening of the packaging bag, and then the first transverse rotating rod 55 is driven to rotate by the second driving motor 56, and the left moving part 22 and the right moving part 23 move toward both sides of the packaging bag in the opening of the packaging bag. At the same time, the vertical rotating rods 202 on the left moving part 22 and the right moving part 23 are rotated by their respective first driving motors 203, so that the two stretching arms 21 on the left moving part 22 and the two stretching arms 21 on the right moving part 23 are both moved up and down in the vertical direction to stretch the opening of the packaging bag, and the opening of the packaging bag is stretched into a square opening by the horizontally arranged U-shaped stretching part 210. Then, the left pin member 31 and the right pin member 32 of the pin mechanism 3 move toward the middle of the packaging bag at the same time, and the four opening arms 21 are reset and moved synchronously. During the simultaneous movement of the left pin member 31, the right pin member 32 and the opening arms 21, the packaging bag opened into a square opening is folded into an accordion-like opening. Finally, the upper sealing member 41 and the lower sealing member 42 of the sealing device 4 are pressed on the upper and lower sides of the packaging bag opening to complete the sealing. The sealing effect is good, no manual operation is required, the degree of automation is improved, the work efficiency is high, the flatness of the seal is guaranteed, and the sealing quality of the packaging bag is guaranteed.

[0063] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A packaging bag sealing device, characterized in that: include Packaging frame; A bag-opening mechanism, used for opening the packaging bag, the bag-opening mechanism is installed on one side of the packaging frame along the Y-axis direction, the packaging frame includes an opening arm corresponding to the opening of the packaging bag, and the opening of the packaging bag is opened to a square opening by the opening arm; A pin mechanism is installed on the packaging frame along the X-axis direction, and the pin mechanism includes a left pin member and a right pin member that are symmetrically arranged, and the left pin member and the right pin member correspond to two sides of the packaging bag respectively; A sealing device is installed on the packaging frame, the sealing device includes an upper sealing member and a lower sealing member which are arranged in a corresponding manner in the Z-axis direction, and synchronously moves back and forth in the Z-axis direction to seal the opening of the packaging bag at the upper and lower parts of the packaging bag; the opening arm and the pin member are both located between the upper sealing member and the lower sealing member; The bag-supporting mechanism, the pin-inserting mechanism and the sealing device work independently, and the side edge of the packaging bag is gradually stored in the middle of the packaging bag as the left pin-inserting member and the right pin-inserting member move toward each other; The bag-opening mechanism further includes a left moving part and a right moving part distributed along the X-axis direction, and four opening arms are provided, two of which are provided on the left moving part and the right moving part, respectively, and the two opening arms on the left moving part are symmetrical with the two opening arms on the right moving part; the left moving part and the right moving part move synchronously in opposite directions or towards each other; The two spreading arms on the left moving part and the two spreading arms on the right moving part are symmetrically distributed up and down; the two spreading arms on the left moving part move synchronously in opposite directions or towards each other in the vertical direction, and the two spreading arms on the right moving part move synchronously in opposite directions or towards each other in the vertical direction; The left moving part and the right moving part each include a bottom plate, a vertical rotating rod and a first driving motor for driving the vertical rotating rod to rotate, the vertical rotating rod is mounted on the bottom plate, and two moving blocks for mounting the spreading arms are threadedly connected to the vertical rotating rod; The two moving blocks move synchronously in opposite directions or towards each other in the vertical direction; A vertical slide rail corresponding to the vertical rotating rod is provided on the bottom plate, and the two moving blocks are both slidably connected to the vertical slide rail; The bag-opening mechanism further comprises a pushing unit for driving the opening arm to reciprocate toward the opening of the packaging bag; the pushing unit comprises a moving part moving along the Y-axis direction and a shell fixed on the packaging frame, the moving part is provided with a mounting plate moving synchronously therewith, and the left moving part and the right moving part are both slidably mounted on the mounting plate; The pin mechanism comprises a crossbeam fixed to the packaging frame along the X-axis direction, a second transverse rotation rod and a second transverse guide rail fixed to the crossbeam are provided below the crossbeam, two pin sliders are threadedly connected to the second transverse rotation rod, and the pin sliders are slidably connected to the second transverse guide rail at the same time, and the two pin sliders are used to install the left pin piece and the right pin piece respectively; The left pin member and the right pin member both include a pressing portion extending along the X-axis direction, and the pressing portion of the left pin member and the pressing portion of the right pin member are arranged facing each other; The end of the spreading arm comprises a horizontally arranged U-shaped spreading portion.

2. The packaging bag sealing device according to claim 1, characterized in that: The mounting plate is provided with a first transverse guide rail and a first transverse rotation rod extending along the X-axis, and the mounting plate is also provided with a second driving motor that drives the first transverse rotation rod to rotate; The left moving part and the right moving part are both threadedly connected to the first transverse rotating rod and are slidably connected to the first transverse guide rail. The left moving part and the right moving part move synchronously in opposite directions or towards each other on the first transverse rotating rod along the first transverse guide rail.

3. The packaging bag sealing device according to claim 1, characterized in that: A pulley group moving along the Z-axis direction is respectively provided on the left and right sides of the packaging frame, and the two pulley groups each include a belt that reciprocates in the Z-axis direction, and both ends of the upper sealing member and the lower sealing member are respectively fixed on the belts of the two pulley groups; The upper sealing member and the lower sealing member are provided with mutually matching corrugated pressing parts on their corresponding surfaces, and the pressing parts extend along the Y-axis direction; The packaging frame is also provided with a synchronous connecting shaft for connecting the two pulley groups for synchronous rotation, and one end of the synchronous connecting shaft is transmission-connected to the main driving motor.

4. The packaging bag sealing device according to claim 3, characterized in that: A guide rail extending along the Z-axis direction is also provided on the left and right sides of the packaging frame respectively; guide sliders for sliding connection to the guide rails are fixed on both ends of the upper sealing member and the lower sealing member.

Images