Bale press

Abstract

The utility model belongs to packing mechanical technical field discloses packing machine, when second heat seal structure is close to first heat seal structure in packing machine, first heat seal structure and second heat seal structure can heat seal packing bag, the position of adjusting plate is adjustable along first direction relative to the position of rack, adjusting plate is used for limiting the farthest position of second heat seal structure movement along the direction of away from first heat seal structure, thereby can limit the maximum distance between first heat seal structure and second heat seal structure, when packing machine is used for heat sealing the packing bag of larger size, can make the maximum distance between first heat seal structure and second heat seal structure be longer through changing the position of adjusting plate, when packing machine is used for heat sealing the packing bag of smaller size, can make the maximum distance between first heat seal structure and second heat seal structure be shorter through changing the position of adjusting plate, in the heat seal process, the total stroke of second heat seal structure movement is shorter to adapt to the packing bag of smaller size, can promote the efficiency of sealing package.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and in particular to a packing machine. Background Technology

[0002] Packaging machines can be used for automatic labeling and rapid sealing of packaging bags such as courier bags. The structure of packaging machines in related technologies is as follows: Figures 1-6 As shown, the packaging machine includes a frame 1' with a guide shaft 11'. The packaging machine also includes a heating wire 2' and a heat-sealing plate 3'. The heating wire 2' is fixedly mounted on the frame 1', and the heat-sealing plate 3' is slidably mounted on the guide shaft 11', allowing the heat-sealing plate 3' to slide relative to the heating wire 2', moving closer to or further away from it. When heat-sealing a packaging bag 100 is required, the packaging bag 100 can be placed between the heating wire 2' and the heat-sealing plate 3'. Then, the movement of the heat-sealing plate 3' is controlled to bring the heating wire 2' and the heat-sealing plate 3' closer together, squeezing the packaging bag 100. Heat sealing is achieved through their mutual cooperation. During the heat-sealing process, the stroke of the heat-sealing plate 3' from its initial position to its final position is the heat-sealing stroke. When the packaging machine is used to heat-seal larger packaging bags 100 (e.g., ...), the heat-sealing stroke is applied. Figures 3-4 As shown), the heat-sealing platen 3' can compress the packaging bag 100 throughout its entire heat-sealing stroke. However, when the packaging machine is used to heat-seal smaller packaging bags 100 (such as...), Figures 5-6 As shown, the first half of the heat-sealing stroke of the heat-sealing platen 3' fails to contact the packaging bag 100, constituting an ineffective heat-sealing stroke. Only when the heat-sealing platen 3' moves to the latter half of its stroke can it begin to squeeze the packaging bag 100; that is, only the latter half of the heat-sealing stroke is effective. Therefore, when this packaging machine heat-seales small packaging bags 100, there is a waste of heat-sealing stroke, resulting in low sealing efficiency. Utility Model Content

[0003] According to one aspect of the present invention, a packing machine is provided to solve the problem that in the prior art, when packing machines heat-seal small-sized packaging bags, there is a waste of heat-sealing stroke, resulting in low sealing efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Packaging machine, including:

[0006] frame;

[0007] The first heat-sealing structure is fixedly mounted on the frame;

[0008] The second heat-sealing structure can move closer to or further away from the first heat-sealing structure along the first direction. The first heat-sealing structure and the second heat-sealing structure are spaced apart along the first direction and form a gap for the packaging bag to pass through. When the second heat-sealing structure moves closer to the first heat-sealing structure, the first heat-sealing structure and the second heat-sealing structure can heat-seal the packaging bag.

[0009] An adjustment plate, whose position relative to the frame is adjustable along a first direction, is used to limit the farthest position of the second heat-sealing structure in a direction away from the first heat-sealing structure.

[0010] As a preferred embodiment of the packaging machine, the frame is provided with a connecting structure, the connecting structure including a plurality of first connecting parts spaced apart along a first direction, the adjusting plate is provided with a second connecting part, and the second connecting part can be detachably connected to one of the plurality of first connecting parts.

[0011] As a preferred embodiment of the packaging machine, the first connecting part is a slot, and the second connecting part includes a post. The slot includes a first groove wall and a second groove wall that are parallel and spaced apart along a first direction. The post is inserted into the slot and is located between the first groove wall and the second groove wall.

[0012] As a preferred embodiment of the packaging machine, the outer peripheral surface of the insert is provided with external threads, the adjusting plate is provided with threaded holes, and the insert is screwed into the threaded holes;

[0013] The second connecting part also includes a bolt head, which is fixedly connected to the insert post, and the outer diameter of the bolt head is larger than the groove width of the slot. The bolt head can be pressed against or separated from the frame.

[0014] As a preferred embodiment of the packaging machine, the first connecting part further includes a communicating groove, which extends along a first direction and communicates with each of the slots, and the insert can slide along the communicating groove and enter any of the slots.

[0015] As a preferred embodiment of the packaging machine, the frame is provided with multiple connecting structures, and the adjusting plate is provided with multiple second connecting parts, with each of the multiple connecting structures corresponding to one of the multiple second connecting parts.

[0016] As a preferred embodiment of the packaging machine, the adjusting plate is disposed on the side of the second heat-sealing structure away from the first heat-sealing structure, and a limiting post is disposed on the side of the adjusting plate close to the second heat-sealing structure, the limiting post being able to abut against the second heat-sealing structure along the first direction.

[0017] As a preferred embodiment of the packaging machine, the frame is provided with two guide shafts extending along a first direction. The two ends of the second heat-sealing structure are respectively slidably engaged with the two guide shafts. The two guide shafts are respectively inserted through the two ends of the adjusting plate, and there is a gap between the outer wall of the guide shaft and the inner wall of the adjusting plate. The two guide shafts are fixedly connected by guide shaft fixing members.

[0018] As a preferred embodiment of the packaging machine, the frame includes a frame body and two fixed supports fixedly disposed on the frame body. The fixed supports have receiving grooves, and the two guide shafts are disposed in the receiving grooves of the two fixed supports in a one-to-one correspondence.

[0019] As a preferred embodiment of the packaging machine, it also includes a drive unit for driving the second heat-sealing structure to slide relative to the frame in a first direction.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a packaging machine, including a frame, a first heat-sealing structure, a second heat-sealing structure, and an adjusting plate. The first heat-sealing structure is fixedly mounted on the frame. The second heat-sealing structure can move closer to or further away from the first heat-sealing structure along a first direction. The first and second heat-sealing structures are spaced apart along the first direction, forming a gap for the packaging bag to pass through. When the second heat-sealing structure approaches the first heat-sealing structure, the first and second heat-sealing structures can heat-seal the packaging bag. When it is necessary to heat-seal the packaging bag, the packaging bag to be heat-sealed can be placed in the gap between the first and second heat-sealing structures. Then, the second heat-sealing structure is controlled to move along the first direction to continuously approach the first heat-sealing structure. During the movement of the second heat-sealing structure, the second heat-sealing structure continuously squeezes the packaging bag and eventually cooperates with the first heat-sealing structure to achieve heat sealing of the packaging bag. The position of the adjusting plate relative to the frame is adjustable along the first direction. The adjusting plate is used to limit the farthest position of the second heat-sealing structure in the direction away from the first heat-sealing structure, thereby limiting the maximum distance between the first and second heat-sealing structures. When the baling machine is used to heat-seal larger packaging bags, the position of the adjusting plate can be changed to make the maximum distance between the first and second heat-sealing structures longer, allowing larger packaging bags to pass through. When the baling machine is used to heat-seal smaller packaging bags, the position of the adjusting plate can be changed to make the maximum distance between the first and second heat-sealing structures shorter. During the heat-sealing process, the total stroke of the second heat-sealing structure is shorter to accommodate smaller packaging bags and improve sealing efficiency. Attached Figure Description

[0022] Figure 1 This is an exploded view of a packing machine in the prior art;

[0023] Figure 2This is a schematic diagram of the first partial structure of a packing machine in the prior art;

[0024] Figure 3 This is a schematic diagram of the second partial structure of a packing machine in the prior art (when the packing machine is used to heat seal large-sized packaging bags).

[0025] Figure 4 This is a schematic diagram of the third part of the structure of a packing machine in the prior art (when the packing machine is used to heat seal packaging bags of larger sizes);

[0026] Figure 5 This is a schematic diagram of the fourth partial structure of a packaging machine in the prior art (when the packaging machine is used to heat-seal small-sized packaging bags);

[0027] Figure 6 This is a schematic diagram of the fifth partial structure of a packaging machine in the prior art (when the packaging machine is used to heat-seal small-sized packaging bags);

[0028] Figure 7 This is a schematic diagram of the packaging machine in an embodiment of this utility model;

[0029] Figure 8 This is an exploded view of the packing machine in an embodiment of this utility model;

[0030] Figure 9 yes Figure 8 Enlarged view of point A in the middle;

[0031] Figure 10 This is a partial structural diagram of the packing machine in an embodiment of the present invention (when the packing machine is used to heat-seal packaging bags of a large size).

[0032] Figure 11 This is a first partial enlarged view of the packing machine in an embodiment of this utility model (when the packing machine is used to heat seal packaging bags of a large size);

[0033] Figure 12 This is a second partial structural diagram of the packing machine in an embodiment of the present invention (when the packing machine is used for heat-sealing packaging bags with small dimensions);

[0034] Figure 13 This is a second partial enlarged view of the packing machine in an embodiment of this utility model (when the packing machine is used to heat-seal small-sized packaging bags).

[0035] In the picture:

[0036] 1', Frame; 11', Guide shaft;

[0037] 2' Heating wire;

[0038] 3' Heat-sealing pressure plate;

[0039] 100. Packaging bags;

[0040] 1. Frame; 11. Slot; 111. Connecting slot; 12. Guide shaft; 13. Guide shaft fixing component; 131. Connecting screw; 14. Frame body; 15. Fixed bracket; 151. Receiving slot;

[0041] 2. First heat-sealing structure;

[0042] 3. Second heat-sealing structure;

[0043] 4. Adjusting plate; 41. Limiting post;

[0044] 5. Second connecting part;

[0045] 6. Driving component; 61. Fixed end of driving component; 62. Telescopic end of driving component. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] In related technologies, when heat-sealing packaging bags, the bags are placed between heating wires and a heat-sealing plate. The heat-sealing plate is then moved to bring the heating wires and the plate closer together, squeezing the bag and achieving heat sealing through their interaction. During the heat-sealing process, the travel distance of the heat-sealing plate from its initial position to its final position is called the heat-sealing stroke. When the packaging machine is used to heat-seal larger bags, the entire heat-sealing stroke of the plate effectively squeezes the bag. However, when used to heat-seal smaller bags, the first half of the heat-sealing stroke fails to contact the bag, constituting an ineffective heat-sealing stroke. Only in the latter half of the stroke does the heat-sealing plate begin to squeeze the bag; only the latter half of the heat-sealing stroke is effective. Therefore, this packaging machine wastes heat-sealing stroke when heat-sealing smaller bags, resulting in low sealing efficiency.

[0051] In response, this embodiment provides a packing machine to solve the problem that existing packing machines waste heat sealing stroke when heat sealing small-sized packaging bags, resulting in low sealing efficiency. This machine can be used in the field of packaging machinery technology.

[0052] Reference Figures 7-13The packaging machine includes a frame 1, a first heat-sealing structure 2, and a second heat-sealing structure 3. The first heat-sealing structure 2 is fixedly installed on the frame 1. The second heat-sealing structure 3 can move closer to or further away from the first heat-sealing structure 2 along a first direction. The first heat-sealing structure 2 and the second heat-sealing structure 3 are spaced apart along the first direction, forming a gap for the packaging bag 100 to pass through. When the second heat-sealing structure 3 moves closer to the first heat-sealing structure 2, the first heat-sealing structure 2 and the second heat-sealing structure 3 can heat-seal the packaging bag 100. When it is necessary to heat-seal the packaging bag 100, the packaging bag 100 to be heat-sealed can be placed in the gap between the first heat-sealing structure 2 and the second heat-sealing structure 3. Then, the second heat-sealing structure 3 is controlled to move along the first direction to continuously move closer to the first heat-sealing structure 2. During the movement of the second heat-sealing structure 3, the second heat-sealing structure 3 continuously squeezes the packaging bag 100 and finally cooperates with the first heat-sealing structure 2 to achieve heat sealing of the packaging bag 100. In this embodiment, one of the first heat-sealing structure 2 and the second heat-sealing structure 3 is a heating wire, and the other is a heat-sealing plate. This embodiment exemplarily provides a scheme in which the first heat-sealing structure 2 is a heating wire and the second heat-sealing structure 3 is a heat-sealing plate. In other embodiments, the first heat-sealing structure 2 can also be a heat-sealing plate and the second heat-sealing structure 3 can be a heating wire.

[0053] Continue to refer to Figures 7-13 The packing machine also includes an adjusting plate 4, whose position relative to the frame 1 is adjustable along a first direction. The adjusting plate 4 is used to limit the farthest position of the second heat-sealing structure 3 in a direction away from the first heat-sealing structure 2, thereby limiting the maximum distance between the first heat-sealing structure 2 and the second heat-sealing structure 3. When the packing machine is used to heat-seal a large-sized packaging bag 100, the position of the adjusting plate 4 can be changed to make the maximum distance between the first heat-sealing structure 2 and the second heat-sealing structure 3 longer (e.g., ...). Figures 10-11 As shown), this allows larger packaging bags 100 to pass through; when the packaging machine is used to heat-seal smaller packaging bags 100, the position of the adjusting plate 4 can be changed to shorten the maximum distance between the first heat-sealing structure 2 and the second heat-sealing structure 3 (e.g., Figures 12-13 As shown in the figure, during the heat sealing process, the total stroke of the second heat sealing structure 3 is shorter, which is suitable for smaller packaging bags 100 and can improve sealing efficiency.

[0054] Continue to refer to Figures 7-13 The frame 1 is provided with a connecting structure, which includes a plurality of first connecting parts spaced apart along a first direction. The adjusting plate 4 is provided with a second connecting part 5. The second connecting part 5 can be detachably connected to one of the plurality of first connecting parts, so that the adjusting plate 4 can have multiple installation positions at the same time. Before use, the adjusting plate 4 can be adjusted to a position that matches the size of the packaging bag 100 to be heat-sealed, thereby realizing multi-position adjustment of the position of the adjusting plate 4.

[0055] Continue to refer to Figures 7-13 The first connecting part is a slot 11, and the second connecting part 5 includes a post. The slot 11 includes a first groove wall and a second groove wall that are parallel and spaced apart along a first direction. The post is inserted into the slot 11 and is located between the first groove wall and the second groove wall. In this embodiment, three slots 11 are provided, corresponding to three different sizes of packaging bags 100. For example, when the packaging machine is used to heat-seal larger packaging bags 100 (such as...), Figures 10-11 As shown), the insert engages with the slot 11 furthest from the first heat-sealing structure 2. When the packaging machine is used to heat-seal a small packaging bag 100 (e.g. Figures 12-13 As shown), the insert engages with the slot 11 closest to the first heat-sealing structure 2. When the packaging machine is used to heat-seal a medium-sized packaging bag 100, the insert engages with the slot 11 located in the middle.

[0056] Continue to refer to Figures 7-13 The outer circumferential surface of the insert is provided with external threads, and the adjusting plate 4 is provided with threaded holes. The insert is screwed into the threaded holes. The second connecting part 5 also includes a bolt head, which is fixedly connected to the insert. The outer diameter of the bolt head is larger than the groove width of the slot 11. The bolt head can be pressed against or separated from the frame 1. Thus, the frame 1 and the adjusting plate 4 can be fixedly connected through the second connecting part 5. When it is necessary to adjust the position of the adjusting plate 4, it can be dislodged from the threaded hole of the adjusting plate 4 by screwing the second connecting part 5, and the bolt head can be separated from the frame 1, thereby releasing the lock on the frame 1 and the adjusting plate 4.

[0057] Continue to refer to Figures 7-13 The first connecting part also includes a connecting groove 111, which extends along the first direction and communicates with each slot 11. The insert can slide along the connecting groove 111 and enter any slot 11. Thus, when the position of the adjusting plate 4 needs to be changed, after loosening the second connecting part 5, it is not necessary to remove the second connecting part 5 from the frame 1. Simply slide the second connecting part 5 along the connecting groove 111 to the corresponding slot 11 and tighten it again with the adjusting plate 4 to complete the position adjustment.

[0058] Continue to refer to Figures 7-13 The frame 1 is equipped with multiple connecting structures, and the adjusting plate 4 is equipped with multiple second connecting parts 5. The multiple connecting structures and the multiple second connecting parts 5 are arranged one-to-one. This arrangement allows the adjusting plate 4 to cooperate with the multiple connecting structures and the multiple second connecting parts 5 during installation, thereby improving the stability of the adjusting plate 4 during installation and preventing the installation angle of the adjusting plate 4 from shifting.

[0059] In other embodiments, the first connecting part and the second connecting part 5 may also be a buckle and a slot, respectively, and the first connecting part and the second connecting part 5 may be snapped together; or, the first connecting part and the second connecting part 5 may be magnetically attracted, and the first connecting part and the second connecting part 5 may be connected by magnetic attraction.

[0060] In addition, as an alternative, the first connecting part can also be a straight groove extending along the first direction, and the second connecting part 5 is a locking screw. The locking screw can pass through any position of the straight groove and be threadedly connected to the adjusting plate 4, so that the adjusting plate 4 and the locking screw can be fixed at any position of the straight groove to achieve stepless adjustment of the position of the adjusting plate 4.

[0061] Continue to refer to Figures 7-13 The adjusting plate 4 is located on the side of the second heat-sealing structure 3 away from the first heat-sealing structure 2, and a limiting post 41 is provided on the side of the adjusting plate 4 closest to the second heat-sealing structure 3. The limiting post 41 can abut against the second heat-sealing structure 3 in the first direction, thereby preventing the second heat-sealing structure 3 from directly colliding with the adjusting plate 4 when it moves in a direction away from the first heat-sealing structure 2, thus providing a certain degree of protection for the adjusting plate 4. Optionally, a buffer pad is provided at the end of the limiting post 41 closest to the second heat-sealing structure 3 to provide cushioning.

[0062] Continue to refer to Figures 7-13 The frame 1 is provided with two guide shafts 12 extending along a first direction. The two ends of the second heat-sealing structure 3 are respectively slidably engaged with the two guide shafts 12. The two guide shafts 12 are fixedly connected by guide shaft fixing parts 13, thereby stably installing the two guide shafts 12 on the frame 1. In this embodiment, the first direction is parallel to the horizontal plane, so that the axis of the guide shaft 12 is parallel to the horizontal plane. When the second heat-sealing structure 3 is installed on the guide shaft 12, its movement relative to the guide shaft 12 will not be affected by its own gravity.

[0063] In addition, two guide shafts 12 are respectively inserted through the two ends of the adjusting plate 4, and there is a gap between the outer wall of the guide shaft 12 and the inner wall of the adjusting plate 4. Specifically, rectangular holes or waist-shaped holes are opened at both ends of the adjusting plate 4, and the two guide shafts 12 pass through the two rectangular holes or waist-shaped holes respectively, and there is a gap between the hole wall and the outer wall of the guide shaft 12, so that the adjusting plate 4 can move along the axial direction of the guide shaft 12 to adjust the maximum distance between the first heat-sealing structure 2 and the second heat-sealing structure 3. In addition, the adjusting plate 4 can also move radially along the guide shaft 12, so that the operator can make fine adjustments to its position along the radial direction (e.g., vertical direction) of the guide shaft 12 to adapt to different working conditions.

[0064] Optionally, the guide shaft fixing member 13 is located on the side of the adjusting plate 4 away from the second heat-sealing structure 3, so that the guide shaft fixing member 13 can also limit the maximum movement position of the adjusting plate 4.

[0065] Optionally, both ends of the guide shaft fixing member 13 are respectively fixedly installed on two fixing brackets 15 by connecting screws 131.

[0066] Continue to refer to Figures 7-13 The frame 1 includes a frame body 14 and two fixed supports 15 fixedly mounted on the frame body 14. The fixed supports 15 have receiving grooves 151. Two guide shafts 12 are correspondingly mounted in the receiving grooves 151 of the two fixed supports 15, which can provide a certain degree of protection for the two guide shafts 12.

[0067] Continue to refer to Figures 7-13 The packaging machine also includes a drive unit 6, which drives the second heat-sealing structure 3 to slide relative to the frame 1 in a first direction. Specifically, the drive unit 6 is a linear drive mechanism and has a fixed end 61 fixedly disposed on the frame body 14 and a telescopic end 62 fixedly disposed on the second heat-sealing structure 3. The telescopic end 62 can reciprocate relative to the fixed end 61, thereby controlling the reciprocating motion of the second heat-sealing structure 3. The drive unit 6 can be a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder, etc.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A packing machine, characterized in that, include: Rack (1); The first heat-sealing structure (2) is fixedly installed on the frame (1); The second heat-sealing structure (3) can approach or move away from the first heat-sealing structure (2) along the first direction. The first heat-sealing structure (2) and the second heat-sealing structure (3) are spaced apart along the first direction and form a gap for the packaging bag (100) to pass through. When the second heat-sealing structure (3) approaches the first heat-sealing structure (2), the first heat-sealing structure (2) and the second heat-sealing structure (3) can heat-seal the packaging bag (100). The adjusting plate (4) is adjustable in position relative to the frame (1) in a first direction. The adjusting plate (4) is used to limit the second heat-sealing structure (3) to the farthest position of movement in a direction away from the first heat-sealing structure (2).

2. The packaging machine according to claim 1, characterized in that, The frame (1) is provided with a connection structure, which includes a plurality of first connection parts spaced apart along a first direction. The adjustment plate (4) is provided with a second connection part (5), which can be detachably connected to one of the plurality of first connection parts.

3. The packaging machine according to claim 2, characterized in that, The first connecting part is a slot (11), and the second connecting part (5) includes a plug. The slot (11) includes a first groove wall and a second groove wall that are parallel and spaced apart along a first direction. The plug is inserted into the slot (11) and is located between the first groove wall and the second groove wall.

4. The packaging machine according to claim 3, characterized in that, The outer circumferential surface of the insert is provided with external threads, the adjusting plate (4) is provided with threaded holes, and the insert is screwed into the threaded holes; The second connecting part (5) also includes a bolt head, which is fixedly connected to the insert post, and the outer diameter of the bolt head is larger than the groove width of the slot (11). The bolt head can be pressed against or separated from the frame (1).

5. The packaging machine according to claim 3, characterized in that, The first connecting part further includes a connecting groove (111) which extends along a first direction and communicates with each of the slots (11). The insert can slide along the connecting groove (111) and enter any of the slots (11).

6. The packaging machine according to claim 2, characterized in that, The frame (1) is provided with multiple connecting structures, and the adjustment plate (4) is provided with multiple second connecting parts (5). The multiple connecting structures are provided in a one-to-one correspondence with the multiple second connecting parts (5).

7. The packaging machine according to claim 1, characterized in that, The adjusting plate (4) is disposed on the side of the second heat-sealing structure (3) away from the first heat-sealing structure (2), and a limiting post (41) is provided on the side of the adjusting plate (4) close to the second heat-sealing structure (3), and the limiting post (41) can abut against the second heat-sealing structure (3) in the first direction.

8. The packing machine according to any one of claims 1-7, characterized in that, The frame (1) is provided with two guide shafts (12) extending in the first direction. The two ends of the second heat-sealing structure (3) are respectively slidably engaged with the two guide shafts (12). The two guide shafts (12) are respectively inserted through the two ends of the adjusting plate (4), and there is a gap between the outer wall of the guide shaft (12) and the inner wall of the adjusting plate (4). The two guide shafts (12) are fixedly connected by guide shaft fixing parts (13).

9. The packaging machine according to claim 8, characterized in that, The frame (1) includes a frame body (14) and two fixed supports (15) fixedly disposed on the frame body (14). The fixed supports (15) have receiving grooves (151), and the two guide shafts (12) are disposed in the receiving grooves (151) of the two fixed supports (15) respectively.

10. The packing machine according to any one of claims 1-7, characterized in that, It also includes a drive element (6) for driving the second heat-sealing structure (3) to slide relative to the frame (1) in a first direction.

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