Packaging bag heat sealing mechanism

Abstract

The utility model belongs to the field of packaging equipment, and discloses a packaging bag heat-sealing mechanism which comprises a heat-sealing assembly, a lifting mechanism and a transferring assembly, the transferring assembly comprises a packaging bag carrier and a moving mechanism, the packaging bag carrier is driven by the moving mechanism to move between a bag receiving position and a heat-sealing position in the transverse direction, and the lifting mechanism is used for lifting the packaging bag carrier. The heat sealing assembly is driven by a lifting mechanism to move up and down between an avoiding position and a heat sealing position, the lifting movement stroke of the heat sealing assembly is configured to comprise a vertical movement component and a transverse movement component, and when the heat sealing assembly is switched to the heat sealing position, the heat sealing assembly conducts heat sealing on the packaging bag with the bag opening facing the transverse direction on the packaging bag carrier. The problem that the heat-sealing assembly interferes with other mechanisms of the packaging machine in the transverse direction in the moving process can be solved, the purpose of reducing the occupied transverse space below as much as possible can be achieved, more joined and coordinated movement is achieved, modularization of the heat-sealing mechanism is achieved, the complexity of the packaging machine is better reduced, and the packaging efficiency is improved. And the convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, and specifically relates to a heat sealing mechanism for packaging bags. Background Technology

[0002] Automatic bagging machines are a common type of packaging equipment. They typically stack several packaging bags in the storage section of the machine, and then the bag-retrieving mechanism automatically retrieves the bags one by one from the storage section. Then, the machine performs the operations of opening, filling, sealing, and discharging the bags in sequence, finally obtaining finished bags filled with materials and sealed.

[0003] In existing technologies, a common packaging machine involves a bag mounted on a clamping assembly with its opening facing horizontally. A pushing mechanism pushes the material into the bag horizontally and continues pushing it to the heat-sealing station. During this pushing process, a liftable tray below supports the bag to maintain its horizontal orientation. The heat-sealing station uses two heat-sealing blocks located above and below the bag opening to perform the heat sealing process. However, while this heat-sealing method simplifies the structure of the heat-sealing assembly, it also results in a longer pushing stroke for the pushing mechanism, increasing the overall size of the mechanism and requiring more space. Furthermore, it necessitates a matching tray mechanism, making modularity impossible and resulting in a complex structure. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a heat-sealing mechanism for packaging bags to solve the problem that existing heat-sealing components are not conducive to the modularization and structural repositioning of packaging machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A heat-sealing mechanism for packaging bags includes a heat-sealing component, a lifting mechanism, and a transfer component. The transfer component includes a packaging bag carrier and a moving mechanism. The packaging bag carrier is driven by the moving mechanism to move laterally between a bag receiving position and a heat-sealing position. The heat-sealing component is driven by the lifting mechanism to move up and down between a clearance position and a heat-sealing position. The lifting stroke of the heat-sealing component is configured to include a vertical movement component and a lateral movement component. When the heat-sealing component switches to the heat-sealing position, it heat-seals the packaging bag with its opening facing laterally on the packaging bag carrier.

[0007] In a possible implementation, the lifting mechanism includes a slider, a guide rail, and a lifting drive mechanism. The heat sealing assembly is connected to the slider, which is driven by the lifting drive mechanism to move along the guide rail. The path of the guide rail includes a lifting section and a feeding section arranged from the clearance position to the heat sealing position. The lifting section includes at least a vertical movement component, and the feeding section includes at least a lateral movement component.

[0008] In one possible implementation, the lifting drive mechanism includes a rotatably mounted swing arm, which engages with a slide member via a slotted pin pair to drive the slide member to move along a guide rail.

[0009] In a possible implementation, the lifting section is a straight section, the feeding section bends and changes direction relative to the lifting section, the sliding member is provided with a guide part one and a guide part two, the guide part one and the guide part two are distributed back and forth along the guide rail path, the guide part one and the guide part two slide along the guide rail respectively and are rotatable relative to the guide rail, and the swing arm and the guide part one form a groove pin pair.

[0010] In a possible implementation, the heat sealing assembly includes a heat sealing part one, a heat sealing part two, and an actuation mechanism. The actuation mechanism includes a cam drive member and sliding members one and two that slide relative to each other. The heat sealing part one is connected to the sliding member one, and the heat sealing part two is connected to the sliding member two. The sliding member one and the sliding member two slide relative to each other through the cam drive member, so that the heat sealing part one and the heat sealing part two can open and close.

[0011] In one possible implementation, the packaging bag carrier includes a tray for supporting the packaging bag, and a bag clamping assembly for clamping both sides of the packaging bag is provided on the tray.

[0012] In one possible implementation, the bag clamping assembly includes a first clamp for clamping one side of the packaging bag and a second clamp for clamping the other side of the packaging bag. The first clamp and the second clamp are moved by a tensioning drive mechanism to adjust the distance between the first clamp and the second clamp.

[0013] In a possible implementation, the packaging bag carrier further includes a feeding drive mechanism, which drives the pallet to switch between a supporting posture and a feeding posture.

[0014] In a possible implementation, clamp one and clamp two respectively include clamping part one and clamping part two and clamping drive mechanism. Clamping part one and clamping part two are driven to rotate by clamping drive mechanism to perform clamping opening and closing. The rotation angle of clamping part one and clamping part two between clamping state and open state is greater than or equal to 90°.

[0015] In possible implementations, multiple heat-sealing components are arranged in parallel, and multiple packaging bag carriers are correspondingly arranged.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The heat-sealing mechanism for packaging bags of this utility model can cooperate with the heat-sealing component driven by the lifting component through the transfer component. The transfer component can move the packaging bag filled with material from the receiving position to the heat-sealing position. At this time, the heat-sealing component can be driven by the lifting mechanism to move up and down between the clearance position and the heat-sealing position. The lifting movement includes at least vertical movement and horizontal movement. This can avoid the problem of the heat-sealing component interfering with other mechanisms of the packaging machine in the horizontal direction during the movement. This can also achieve the purpose of minimizing the occupation of the horizontal space below, and achieve more seamless and coordinated movement. Moreover, this heat-sealing method can effectively reduce the length and volume of the packaging machine in the horizontal direction, avoiding the problem of the need to design a large stroke for mechanisms such as the pusher, which makes the overall mechanism complex. It can also make the heat-sealing component structurally independent of other mechanisms of the packaging machine as a module, realizing the modularization of the heat-sealing mechanism, which is more conducive to reducing the complexity of the packaging machine and improving convenience. Attached Figure Description

[0018] Figure 1 A first-person perspective stereoscopic view of a heat-sealing mechanism for packaging bags;

[0019] Figure 2 A stereoscopic view of a heat-sealing mechanism for packaging bags from a second perspective;

[0020] Figure 3 This is a schematic diagram illustrating the movement principle of the heat-sealing component of a packaging bag heat-sealing mechanism under the drive of a lifting drive mechanism;

[0021] Figure 4 This is a schematic diagram of the actuation mechanism of a packaging bag heat sealing mechanism, which shows a structure using a cam as the cam element;

[0022] Figure 5 This is a schematic diagram of the structure of a heat-sealing mechanism for packaging bags when the actuation mechanism uses an elliptical cam for push transmission;

[0023] Figure 6 This is a schematic diagram of a packaging bag heat sealing mechanism with a heat sealing bag feeding mechanism.

[0024] Figure 7 This is a schematic diagram of a heat-sealing bag feeding mechanism for a packaging bag heat-sealing system, which conceals a cover plate of a movable plate.

[0025] Figure 8 for Figure 7 A partially enlarged schematic diagram of part A of the bag clamp assembly;

[0026] Figure 9 for Figure 7 A structural diagram of part B of fixture one;

[0027] Figure 10for Figure 7 A partially enlarged schematic diagram of part C of the feeding drive mechanism and pallet.

[0028] In the diagram: 1-Heat-sealing assembly; 11-Heat-sealing section; 111-Heat-sealing section one; 112-Heat-sealing section two; 12-Guide section one; 13-Guide section two; 14-Frame; 15-Actuation mechanism; 151-Slide bar assembly one; 152-Slide bar assembly two; 153-First pushing section; 154-Second pushing section; 155-Cam drive component; 1551-Rail; 1552-Slide block; 1553-First connecting rod; 1554-Second connecting rod; 2-Lifting drive mechanism; 2 1-Swing arm; 3-Guide rail; 31-Path; 311-Lifting section; 312-Feeding section; 4-Packaging bag; 5-Bag clamping assembly; 51-Clamping fixture one; 511-Clamping block; 52-Clamping fixture two; 53-Panel; 54-Tensioning drive mechanism; 541-Lead screw; 542-Threaded connecting sleeve; 543-Moving plate; 544-Shaft one; 545-Gear; 546-Double-sided rack; 55-Shaft two; 56-Drive rod; 57-Unloading drive mechanism; 6-Moving mechanism. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] Please refer to Figure 1-10 As shown, an embodiment of this application provides a heat-sealing assembly 1 for a packaging bag 4, including a heat-sealing assembly 1, a lifting mechanism, and a transfer assembly. The transfer assembly includes a packaging bag carrier and a moving mechanism 6. The packaging bag carrier is driven by the moving mechanism 6 to move laterally between a bag receiving position and a heat-sealing position. The heat-sealing assembly 1 is driven by the lifting mechanism to move up and down between a clearance position and a heat-sealing position. The lifting stroke of the heat-sealing assembly 1 is configured to include a vertical movement component and a horizontal movement component. When the heat-sealing assembly 1 switches to the heat-sealing position, it heat-seals the packaging bag 4 with the bag opening facing laterally on the packaging bag carrier.

[0031] The heat-sealing assembly 1 is used to heat-seal the opening of the packaging bag 4. Driven by a lifting mechanism, it moves up and down between the clearance position and the heat-sealing position. In the clearance position, the heat-sealing assembly 1 can avoid the movements of other mechanisms below the packaging machine and reduce the space it occupies below. In the heat-sealing position, the heat-sealing assembly 1 can heat-seal the packaging bag 4. The packaging bag 4 in the heat-sealing position is transferred from the receiving position to the heat-sealing position by the transfer assembly. Specifically, the moving mechanism 6 moves the packaging bag carrier between the receiving position and the heat-sealing position. The receiving position is where the packaging machine's feeding mechanism feeds the material into the packaging bag 4. The transfer assembly receives the packaged bag 4 filled with material and moves it to the heat-sealing position. When the packaging bag 4 on the packaging bag carrier is in the heat-sealing position, its opening is horizontal. This allows the heat-sealing part 11 of the heat-sealing assembly 1 to be inserted through the opening of the packaging bag 4, thus reaching the upper and lower sides of the heat-sealing part 11 for heat sealing. The lifting stroke of the heat-sealing assembly 1 is configured to include both vertical and lateral movement components. The heat-sealing assembly 1 typically employs a heat-sealing section 11 with an opening and closing action. During heat sealing, the heat-sealing section 11 is located on both sides of the opening of the packaging bag 4. If only the vertical movement component moves vertically up and down, collision and interference between the heat-sealing section 11 and the packaging bag 4 will occur. Therefore, a lateral movement component is added during the lifting and lowering of the heat-sealing assembly 1, allowing the heat-sealing section 11 to separate laterally from the packaging bag 4, thus avoiding interference and collision. In a specific implementation, the moving mechanism 6 can be a conveyor belt mechanism, which moves the packaging bag carrier between the bag receiving position and the heat-sealing position via the conveyor belt.

[0032] It is understandable that the lifting and lowering process of the heat-sealing component 1 can be decomposed into vertical and lateral movement components. In other words, its movement process can take many forms, such as a tilted linear lifting method, which allows the heat-sealing component 1 to move from the clearance position to the heat-sealing position, and it has both vertical and lateral movement components. Another example is a deflection method, which allows the heat-sealing component 1 to rotate from the clearance position to the heat-sealing position, and it also has both vertical and lateral movement components. Alternatively, a multi-stage lifting method, such as lifting first and then moving laterally, can also be achieved, and it also has both vertical and lateral movement components. Therefore, it can be seen that there are many kinds of movement processes or methods, and they can be implemented in conjunction with other mechanisms or multiple mechanisms without limitation.

[0033] Through the above technical solution, the transfer component can cooperate with the heat sealing component 1 driven by the lifting component. The transfer component can move the packaging bag 4 filled with material from the receiving position to the heat sealing position. At this time, the heat sealing component 1 can be driven by the lifting mechanism to move up and down between the avoidance position and the heat sealing position. The lifting movement includes at least vertical and horizontal movement components. This can avoid the problem of interference between the heat sealing component 1 and other mechanisms of the packaging machine in the horizontal direction during the movement. This can also achieve the purpose of minimizing the occupation of the horizontal space below, and realize more connected and coordinated movement. Moreover, this heat sealing method can effectively reduce the length and volume of the packaging machine in the horizontal direction, avoid the problem of the need to design a large stroke for mechanisms such as the pusher, which makes the overall mechanism complex. It can also make the heat sealing component 1 structurally independent of other mechanisms of the packaging machine, realize the modularity of the heat sealing component 1, and thus further reduce the complexity of the packaging machine and improve convenience.

[0034] In one embodiment, the lifting mechanism may include a slider, a guide rail 3, and a lifting drive mechanism 2. The heat sealing assembly 1 is connected to the slider, and the slider is driven by the lifting drive mechanism 2 to move along the guide rail 3. The path 31 of the guide rail 3 includes a lifting section 311 and a feeding section 312 arranged from the clearance position to the heat sealing position. The lifting section 311 includes at least a vertical movement component, and the feeding section 312 includes at least a lateral movement component.

[0035] In this way, the heat-sealing assembly 1, which moves along the guide rail 3 via the sliding member, can be driven by the lifting drive mechanism 2 to move along the preset path 31 on the guide rail 3. The path 31 includes a lifting section 311 and a feeding section 312 from the avoidance position to the heat-sealing position. The lifting section includes at least a vertical movement component, and the feeding section 312 includes at least a lateral movement component. This allows the heat-sealing assembly 1 to move along the path 31, at least first vertically, so that it can reach the position close to the heat-sealing position in a shorter distance, and then move in a movement including at least a lateral movement component. This allows the heat-sealing part 11 of the heat-sealing assembly 1 to easily pass through the opening of the packaging bag 4 with the bag opening placed horizontally, and then accurately move to the heat-sealing position for heat sealing. This achieves the movement process in a shorter distance, occupies less space, and facilitates quick movement to the position for heat sealing. At the same time, since it does not occupy the space below, it is more conducive to the setting of other structures of the packaging machine, and can effectively shorten the pushing stroke of the pushing mechanism of the packaging machine, thereby reducing the complexity of the packaging machine.

[0036] Furthermore, in order to reduce energy consumption and the complexity of the drive mechanism, the lifting drive mechanism 2 includes a rotatably mounted swing arm 21, which engages with the slide member through a slotted pin pair to drive the slide member to move along the guide rail 3.

[0037] In this way, the swing arm 21 and the slide are engaged by a slotted pin pair, which allows the swing arm 21 to meet the movement process of the heat sealing assembly 1, including both the vertical and lateral moving parts. It also enables a single mechanism to drive different directions, avoiding the need to set up multiple driving mechanisms to drive separately, which would lead to increased energy consumption, increased space occupation, and increased structural complexity. This structural setting is more reasonable and effective.

[0038] To achieve shorter movement and accurate guidance of the heat-sealing assembly 1, the lifting section 311 is a straight section, and the feeding section 312 is bent and deflected relative to the lifting section 311. The slide is provided with a guide part 12 and a guide part 23, which are distributed back and forth along the path 31 of the guide rail 3. The guide part 12 and the guide part 23 slide along the guide rail 3 and are rotatable relative to the guide rail 3. The swing arm 21 and the guide part 12 form a groove and pin pair.

[0039] The straight-line lifting section 311 facilitates translation under the drive of the swing arm 21, while the feeding section 312 bends and changes direction relative to the lifting section 311 and bends and changes direction towards the heat-sealing position. This enables the heat-sealing mechanism to feed a short distance towards the heat-sealing position. Simultaneously, the heat-sealing mechanism is guided by guide parts 12 and 13 on the slide. When the heat-sealing assembly 1 moves up and down along the lifting section 311, both guide parts 12 and 13 move linearly within the lifting section 311. When the lower guide part 12 enters the feeding section 312, under the continued drive of the swing arm 21, it can enter the feeding section 312 and move along it to its end. At the same time, the heat-sealing assembly 1 rotates slightly around the guide part 12, allowing it to move to the heat-sealing position.

[0040] Specifically, the lifting section 311 is an inclined straight section with a small inclination angle relative to the longitudinal direction. This allows the heat-sealing component 1, located directly above the heat-sealing position, to avoid the packaging bag 4 by moving up and down slightly, thus preventing interference with the packaging bag 4. When it moves up and down to a position close to the heat-sealing position, it rotates slightly along the feed section 312, allowing the heat-sealing component 1 to move to the heat-sealing position. During this process, the opened heat-sealing part 11 can also be inserted through the bag opening, so that when the heat-sealing component 1 moves to the heat-sealing position, it is located on the upper and lower sides of the bag opening, which facilitates heat sealing.

[0041] The swing arm 21 of the lifting drive mechanism 2 can rotate around an axis to realize the movement of the swing arm 21. The swing arm 21 is movably engaged with the guide part 12 through a grooved pin pair. The guide part 12 and the guide part 23 are guided and constrained in the lifting section 311, so that the swing arm 21 can drive the heat sealing assembly 1 to move along the lifting section 311 in an oblique first posture during the swinging process. After the guide part 12 enters the feed section 312, the swing arm 21 continues to swing and may drive the guide part 12 to move in a first oblique posture. As the heat sealing assembly 1 enters the feed section 312 and reaches its end, it moves from an inclined first posture to a vertical second posture. While traveling along the feed section 312, it can rotate around the guide part 13 as the center through the rotation guide of the feed section 312. This allows the inclined heat sealing assembly 1 to be rotated and adjusted to a vertical second posture. At the same time, the heat sealing part 11 will also open during this process, allowing the bag opening of the packaging bag 4 placed horizontally at the heat sealing position to pass through and accurately reach the heat sealing position for heat sealing.

[0042] In a preferred embodiment of the heat sealing assembly 1, the heat sealing assembly 1 includes a heat sealing part 111, a heat sealing part 112, and an actuation mechanism 15. The actuation mechanism 15 includes a cam drive member 155 and a sliding member 1 and a sliding member 2 that slide relative to each other. The heat sealing part 111 is connected to the sliding member 1, and the heat sealing part 112 is connected to the sliding member 2. The sliding member 1 and the sliding member 2 are driven to slide relative to each other by the cam drive member 155, so that the heat sealing part 111 and the heat sealing part 112 can perform opening and closing actions.

[0043] The heat-sealing section 111 and heat-sealing section 112 form a heat-sealed opening. The heat-sealed opening can be opened to allow the bag 4 to pass through, and then the opening can be heat-sealed by clamping. The heat-sealing section 11 is driven to open and close by the actuation mechanism 15. Specifically, the actuation mechanism 15 is driven to open and close by sliding members 1 and 2, which can slide against each other. Sliding member 1 is driven to slide by cam drive member 155 while connected to heat-sealing section 111, and sliding member 2 is driven to slide by cam drive member 155 while connected to heat-sealing section 112. In this way, when the cam drive member 155 rotates, it can drive heat-sealing section 111 and heat-sealing section 112 to open and close, which facilitates the bag 4 to pass through in the open state and to close during heat sealing. In the specific implementation process, the sliding component includes a frame 14, on which a number of heat sealing components 1, an actuation mechanism 15, and a guide part 12 and a guide part 2 13 are provided, so that the heat sealing components 1 can move more stably.

[0044] Specifically, the first sliding component is a slide rod assembly 151 with a vertical first pushing part 153, the second sliding component is a slide rod assembly 152 with a vertical second pushing part 154, and the cam drive component 155 is disposed between the first pushing part 153 and the second pushing part 154. In this way, when the cam drive component 155 rotates and pushes, the slide rod assembly 151 and the slide rod assembly 152 can move in parallel relative to each other, thereby driving the heat sealing part 11 to open and close.

[0045] In the specific implementation process, combined with Figure 4 As shown, the cam drive component 155 can adopt a cam structure, and its circumferential cam surface is used to contact the first push part 153 and the second push part 154. When the cam drive component 155 of the cam structure rotates, its cam surface can push the first push part 153 and the second push part 154 in turn, so that the first push part 153 and the second push part 154 move away from each other or move closer to each other. This can drive the slide rod group 151 and the slide rod group 152 to move towards each other, thereby driving the heat sealing part 111 and the heat sealing part 112 to perform a clamping heat sealing action. By arranging the actuation mechanism 15 vertically on the frame 14 as described above, the width of the frame 14 in the horizontal direction can be greatly reduced, basically only the width of the frame 14. Therefore, the activity space of such a heat sealing component 1 from top to bottom can be set to be smaller, reducing the occupation of the space below. This structure requires the simultaneous setting of a spring connecting the first push part 153 and the second push part 154 for reset; combined with Figure 5 As shown, the cam drive component 155 can also be circular and have an elliptical track 1551 on one side. The track 1551 has two symmetrically distributed slides 1552. One slide 1552 is connected to the first push part 153 through the first connecting rod 1553, and the other slide 1552 is connected to the second push part 154 through the second connecting rod 1554. The first connecting rod 1553 and the second connecting rod 1554 are located on the same straight line. In this way, when the cam drive component 155 rotates, it can drive the first push part 153 and the second push part 154 to move away from each other or move closer to each other, thereby realizing the opening and closing of the heat sealing part 11. With such a transmission structure, there is no need to use a spring for reset.

[0046] Please refer to Figure 6-10 As shown in the embodiments of this application, the packaging bag carrier may include a tray for supporting the packaging bag 4, and a bag clamping assembly 5 for clamping both sides of the packaging bag 4 is provided on the tray.

[0047] The pallet 53 can support the packaging bag 4 when the moving mechanism 6 clamps it from the packaging machine clamping station, and it can also support it during heat sealing. The bag clamping assembly 5 is set above the pallet and is mainly used to hold the packaging bag 4 on both sides. The packaging bag 4 filled with materials can be stably transferred and heat sealed through the bag clamping assembly 5 and the pallet 53.

[0048] In a preferred embodiment of the bag clamping assembly 5, the bag clamping assembly 5 includes a first clamp 51 for clamping one side of the packaging bag 4 and a second clamp 52 for clamping the other side of the packaging bag 4. The first clamp 51 and the second clamp 52 are driven by a tensioning drive mechanism 54 to adjust the distance between the first clamp 51 and the second clamp 52.

[0049] Clamp 1 51 and clamp 2 52 can clamp the packaging bag 4 from both sides respectively. After clamping, the distance between the two clamps can be adjusted by the tensioning drive mechanism 54 to drive relative movement. This makes it easier to tighten the opening of the packaging bag 4 so as to better heat seal and ensure the sealing of the packaging bag 4 after heat sealing. It also makes it easier to clamp packaging bags 4 of different widths, which is more convenient and effective.

[0050] Based on this, the packaging bag carrier may also include a feeding drive mechanism 57, and the pallet is driven by the feeding drive mechanism 57 to deflect and switch between a supporting posture and a feeding posture.

[0051] The pallet can be driven by the feeding drive mechanism 57 to deflect and switch between the supporting posture and the feeding posture. When the pallet is in the supporting posture, it can support the packaging bag 4 and place the packaging bag 4 in a horizontal posture. When the pallet switches to the feeding posture by deflection, after heat sealing and the bag clamping assembly 5 releases the clamp, the packaging bag 4 can fall downward under the action of gravity to facilitate feeding and collection.

[0052] In a preferred embodiment of clamp 1 51 and clamp 2 52, clamp 1 51 and clamp 2 52 respectively include clamping part 1 and clamping part 2 and clamping drive mechanism. Clamping part 1 and clamping part 2 are driven to rotate by clamping drive mechanism to perform clamping opening and closing. The rotation angle of clamping part 1 and clamping part 2 between clamping state and open state is greater than or equal to 90°.

[0053] The clamping drive mechanism can drive the clamping part one and the clamping part two to rotate. When the clamping part one and the clamping part two rotate relative to each other and come into contact, they are in a clamping state. When they rotate relative to each other and move away, they are in an open state. The rotation angle between the clamping state and the open state of the clamping part one and the clamping part two is greater than or equal to 90°. This allows the clamping part one and the clamping part two to rotate to the outside, thereby avoiding interference with the packaging bag 4.

[0054] In the specific implementation process, the tensioning drive mechanism 54 may include a lead screw 541, a threaded connecting sleeve 542, and a moving plate 543. The lead screw 541 is a lead screw 541 with positive and negative threads. A threaded connecting sleeve 542 is connected to each end of the lead screw 541. Each threaded connecting sleeve 542 is connected to a moving plate 543. The first clamp 51 and the second clamp 52 are respectively set on the moving plate 543 driven by the lead screw 541. By rotating the lead screw 541 in both directions, the first clamp 51 and the second clamp 52 can move away from or closer to each other, thereby realizing the clamping of the opening of the packaging bag 4. It can also facilitate the clamping of packaging bags 4 of different widths, making it more convenient and practical.

[0055] Based on this, the clamping drive mechanism may include a rotating shaft 544, a gear 545, and a double-sided rack 546. Two rotating shafts 544 are provided and symmetrically arranged within the movable plate 543. One end of each of the two rotating shafts 544 is provided with a clamping block 511. The clamping blocks 511 of the two rotating shafts 544 serve as clamping part one and clamping part two, respectively. When the two clamping blocks 511 rotate to an angle, they can abut against each other in parallel, thus clamping one edge of the packaging bag 4. When the clamping blocks 511 rotate with the rotating shafts 544, they can clamp against each other. When rotating, the two clamping blocks 511 separate, so that the packaging bag 4 can be released from clamping. For example, after the packaging bag 4 is heat-sealed, it is necessary to release the clamping so that the packaging bag 44 can fall for collection. The other end of the rotating shaft 544 is provided with a gear 545. A double-sided rack 546 meshes between the gears 545 on the two rotating shafts 544. The double-sided rack 546 is driven by a linear drive mechanism. In this way, the two clamping blocks 511 can make synchronous relative movements by the back and forth movement of the double-sided rack 546.

[0056] In order to achieve high-efficiency batch heat sealing at multiple workstations, in the embodiments of this application, multiple heat sealing components 1 are arranged in parallel, and multiple packaging bag carriers are arranged accordingly.

[0057] Multiple sets of heat sealing components 1 are arranged side by side on the frame 14. Correspondingly, a corresponding number of actuation mechanisms 15 are also provided. Each set of actuation mechanisms 15 drives a heat sealing part 11 to perform a clamping action, which can improve the heat sealing efficiency. At the same time, multiple packaging bag carriers are also provided, and each packaging bag carrier corresponds to a set of heat sealing components 1. This enables heat sealing at multiple workstations and transfer between multiple workstations, further improving work efficiency.

[0058] In addition, the unloading drive mechanism 57 may include a second rotating shaft 55 and a drive rod 56. The pallet 53 is connected to a rotating shaft 55. The pallet 53 is provided below the second rotating shaft 55 to drive the pallet 53 to rotate around the second rotating shaft 55 to switch between the supporting posture and the unloading posture. The drive rod 56 may be driven to rotate by a crank-connecting rod mechanism or by other mechanisms, and there are no restrictions.

[0059] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A heat-sealing mechanism for packaging bags, characterized in that, The device includes a heat-sealing assembly (1), a lifting mechanism, and a transfer assembly. The transfer assembly includes a packaging bag (4) carrier and a moving mechanism (6). The packaging bag (4) carrier is driven by the moving mechanism (6) to move laterally between the bag receiving position and the heat-sealing position. The heat-sealing assembly (1) is driven by the lifting mechanism to move up and down between the clearance position and the heat-sealing position. The lifting stroke of the heat-sealing assembly (1) is configured to include a vertical movement component and a horizontal movement component. When the heat-sealing assembly (1) switches to the heat-sealing position, it heat-seals the packaging bag (4) with the bag opening facing laterally on the packaging bag (4) carrier.

2. The heat-sealing mechanism for packaging bags as described in claim 1, characterized in that, The lifting mechanism includes a slide, a guide rail (3) and a lifting drive mechanism (2). The heat sealing assembly (1) is connected to the slide. The slide is driven by the lifting drive mechanism (2) to move along the guide rail (3). The path (31) of the guide rail (3) includes a lifting section (311) and a feeding section (312) from the clearance position to the heat sealing position. The lifting section (311) includes at least a vertical movement component, and the feeding section (312) includes at least a lateral movement component.

3. The heat-sealing mechanism for packaging bags as described in claim 2, characterized in that, The lifting drive mechanism (2) includes a rotatably mounted swing arm (21), which engages with a slide member via a slotted pin pair to drive the slide member to move along the guide rail (3).

4. The heat-sealing mechanism for packaging bags as described in claim 3, characterized in that, The lifting section (311) is a straight section, and the feeding section (312) bends and changes direction relative to the lifting section (311). The sliding part is provided with a guide part one (12) and a guide part two (13). The guide part one (12) and the guide part two (13) are distributed back and forth along the path (31) of the guide rail (3). The guide part one (12) and the guide part two (13) slide along the guide rail (3) and can rotate relative to the guide rail (3). The swing arm (21) and the guide part one (12) form a groove and pin pair.

5. A heat-sealing mechanism for packaging bags as described in claim 1, characterized in that, The heat sealing assembly (1) includes a heat sealing part one (111), a heat sealing part two (112), and an actuation mechanism (15). The actuation mechanism (15) includes a cam drive member (155) and a sliding member one and a sliding member two that slide relative to each other. The heat sealing part one (111) is connected to the sliding member one, and the heat sealing part two (112) is connected to the sliding member two. The sliding member one and the sliding member two slide relative to each other through the cam drive member (155) so that the heat sealing part one (111) and the heat sealing part two (112) can open and close.

6. The heat-sealing mechanism for packaging bags as described in claim 1, characterized in that, The packaging bag (4) carrier includes a tray (53) for supporting the packaging bag (4), and a bag clamping assembly (5) for clamping both sides of the packaging bag (4) is provided on the tray (53).

7. A heat-sealing mechanism for packaging bags as described in claim 6, characterized in that, The bag clamping assembly (5) includes a clamp one (51) for clamping one side of the packaging bag (4) and a clamp two (52) for clamping the other side of the packaging bag (4). The clamp one (51) and the clamp two (52) are driven by a tensioning drive mechanism (54) to adjust the distance between the clamp one (51) and the clamp two (52).

8. A heat-sealing mechanism for packaging bags as described in claim 7, characterized in that, The packaging bag (4) carrier also includes a feeding drive mechanism (57), and the pallet (53) is driven by the feeding drive mechanism (57) to deflect and switch between the supporting posture and the feeding posture.

9. A heat-sealing mechanism for packaging bags as described in claim 7, characterized in that, The clamp one (51) and clamp two (52) respectively include clamping part one and clamping part two and clamping drive mechanism. The clamping part one and clamping part two are driven to rotate by the clamping drive mechanism to perform clamping opening and closing. The rotation angle of the clamping part one and clamping part two between the clamping state and the open state is greater than or equal to 90°.

10. A heat-sealing mechanism for packaging bags as described in claim 1, characterized in that, Multiple heat-sealing components (1) are arranged in parallel, and multiple packaging bag (4) carriers are arranged accordingly.

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