Three-edge sealing inner and outer bag automatic packaging machine

Abstract

The invention discloses a three-edge sealing inner and outer bag automatic packaging machine which comprises a feeding mechanism, an inner bag edge sealing machine and an outer bag edge sealing machine, the feeding mechanism comprises a material suction device and a metering device, the material suction device is used for automatically sucking materials and guiding the materials to the metering device, and the metering device is provided with a discharging port; the inner bag edge sealing machine comprises an unwinding mechanism, a material guiding mechanism and a sealing mechanism, the material guiding mechanism comprises a material guiding barrel, the input end of the material guiding barrel is connected with the discharging port in a matched mode and used for receiving materials of the discharging port and guiding the materials into an inner bag at the output end, and the unwinding mechanism is used for conveying the inner bag to a station. The sealing mechanism comprises a transverse edge sealing device and a vertical edge sealing device, the outer bag edge sealing machine comprises a bag taking mechanism, a bag opening mechanism, a discharging mechanism and a sealing mechanism which are connected in sequence, the discharging mechanism is used for receiving an edge-sealed inner bag and conveying the edge-sealed inner bag into an outer bag, and the sealing mechanism is used for sealing the inner bag. According to the inner bag edge sealing machine, three-edge sealing treatment is achieved through the transverse edge sealing device and the vertical edge sealing device of the inner bag edge sealing machine.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automatic packaging equipment, and particularly relates to a three-side sealing inner-outer bag automatic packaging machine. BACKGROUND

[0002] The material packaging machine is used for whole-line packaging of products, and weighing, bagging, sealing, coding and the like are completed at one time. In the prior art, for example, the patent with the publication number CN212861929U proposes an automatic inner-outer bag or granular material weighing and bagging packaging machine, which solves the problems of low manual feeding efficiency, inaccurate metering, double-station discharging selection and the like, but the inner bag machine of the equipment can only realize back sealing type inner bag forming.

[0003] The back sealing type inner bag has defects of poor sealing edge appearance, weak compression resistance and low product grade, and cannot meet the overall demand of the market for material packaging. In order to solve the above problems, the existing equipment needs to be upgraded and improved. SUMMARY

[0004] The application provides a three-side sealing inner-outer bag automatic packaging machine, which aims to design a three-side sealing inner bag forming machine, which can improve the compression resistance of the packaging bag while ensuring the sealing strength, and can also improve the appearance and flatness of the inner bag.

[0005] To solve the above technical problems, the application provides a three-side sealing inner-outer bag automatic packaging machine, which comprises: A feeding mechanism comprising a material suction device and a metering device, the material suction device is used for automatically sucking material and guiding the metering device, and the metering device is provided with a discharge port; An inner bag sealing edge machine comprising a unwinding mechanism, a material guiding mechanism and a sealing mechanism, the material guiding mechanism comprises a material guiding cylinder, the input end of the material guiding cylinder is connected with the discharge port in a matched mode, used for receiving the material from the discharge port and guiding it into the inner bag at the output end, the unwinding mechanism is used for conveying the inner bag to a work station, and the sealing mechanism comprises a horizontal sealing edge device and a vertical sealing edge device, used for three-side sealing edge processing of the inner bag; An outer bag sealing edge machine comprising a bag taking mechanism, a bag opening mechanism, a discharging mechanism and a sealing mechanism connected in sequence, the discharging mechanism is used for receiving the inner bag with sealed edge and conveying it into the outer bag; A main machine, which is electrically connected with the feeding mechanism, the inner bag sealing edge machine and the outer bag sealing edge machine.

[0006] Further, the discharging mechanism comprises a discharging cylinder, and the output end of the material guiding cylinder, the inner bag work station and the discharging cylinder are sequentially arranged from top to bottom and located on the same axis, so as to guide the material to the inner bag and / or the discharging cylinder.

[0007] Further, the discharging mechanism further comprises a sliding device, and a first discharging position and a second discharging position, and the discharging cylinder is arranged on the sliding device to switch between the first discharging position and the second discharging position.

[0008] Further, the metering device comprises a first measuring cup hopper and a second measuring cup hopper, each of the measuring cup hoppers has a discharge port; the inner bag sealing machine is provided with two work stations, the unwinding mechanism comprises a first unwinding device and a second unwinding device, the transverse sealing device comprises a first transverse sealing device and a second transverse sealing device, the vertical sealing device comprises a first vertical sealing device and a second vertical sealing device, the material guiding cylinder comprises a first material guiding cylinder and a second material guiding cylinder corresponding to the discharge ports of the measuring cup hoppers; the discharging mechanism comprises a first discharging device and a second discharging device, the first discharging device is connected with the first material guiding cylinder in a matched mode, and the second discharging device is connected with the second material guiding cylinder in a matched mode.

[0009] Further, the first transverse sealing device is arranged close to the first work station, the second transverse sealing device is arranged close to the second work station, the first vertical sealing device is arranged close to the first work station, and the second vertical sealing device is arranged close to the second work station.

[0010] Further, the outer bag sealing machine further comprises a weighing mechanism, and the outer bag sealing machine further comprises an auxiliary bag unfolding mechanism, which is arranged between the discharging mechanism and the sealing mechanism.

[0011] Further, the outer bag sealing machine further comprises an opening bag detection mechanism, which is arranged between the opening bag mechanism and the discharging mechanism.

[0012] Compared with the prior art, the three-edge sealing treatment is realized through the transverse and vertical sealing devices of the inner bag sealing machine, the feeding mechanism, the inner and outer bag sealing machines are cooperatively controlled by the main machine, the problem of poor sealing effect of the traditional back sealing type inner bag sealing is solved, and the advantages of improving the appearance of the package, enhancing the compression resistance and realizing the full-process automatic control are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 A structure schematic diagram of a three-edge sealing inner and outer bag automatic packaging machine is provided for the embodiments of the present application. Figure 2 Figure 1 ​A schematic diagram of the inner bag sealing machine in the illustrated embodiment; Figure 3 for Figure 1 A schematic diagram of the outer bag sealing machine in the embodiment shown; Reference numerals: 10, feeding mechanism; 20, inner bag sealing machine; 30, outer bag sealing machine; 11, suction device; 12, metering device; 21, unwinding mechanism; 22, guiding mechanism; 23, transverse sealing device; 24, vertical sealing device; 31, bag picking mechanism; 32, bag opening mechanism; 33, material feeding mechanism; 34, sealing mechanism; 35, bag opening detection mechanism; 36, auxiliary bag unfolding mechanism; 37, weighing mechanism; 211, first unwinding device; 212, second unwinding device; 221, first guide cylinder; 222, second guide cylinder; 231, first transverse sealing device; 232, second transverse sealing device; 241, first vertical sealing device; 242, second vertical sealing device; 331, first unloading position; 332, second unloading position; 333, unloading cylinder; 334, sliding device. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present application. In this application, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" generally refer to the upper, lower, left, and right directions indicated by reference to the accompanying drawings. "Inner" and "outer" refer to the inner and outer directions relative to the outline of the component itself.

[0016] Similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] See Figures 1 to 3 This application proposes an exemplary embodiment of a three-sided sealing inner and outer automatic packaging machine, such as... Figure 1As shown, the packaging machine includes a feeding mechanism 10, an inner bag sealing machine 20, an outer bag sealing machine 30, and a main unit. The feeding mechanism 10 automatically grabs material via a suction device 11 and feeds it into a metering device 12. The metering device 12 has a discharge port for quantitative feeding. The inner bag sealing machine 20 is equipped with an unwinding mechanism 21 that transports the packaging film to the workstation. A guiding mechanism 22 guides the material from the discharge port into the inner bag. Horizontal and vertical sealing devices 24 perform three-sided sealing on the inner bag. The outer bag sealing machine 30 grabs the outer bag via a bag-picking mechanism 31, opens the bag opening via a bag-opening mechanism 32, and a feeding mechanism 33 inserts the sealed inner bag into the outer bag. The sealing mechanism 34 then completes the outer bag sealing. The main unit coordinates the timing of each mechanism's actions via electrical connections.

[0018] The material suction device 11 is an execution unit that uses negative pressure adsorption to transfer materials. Specifically, it can be implemented using a vacuum suction cup combined with a pneumatic control system to ensure no spillage during material transfer. The metering device 12 is a container used to precisely control the amount of material dispensed. Specifically, it can be a volumetric measuring cup combined with a solenoid valve to control opening and closing, ensuring consistent weight for each bag. The guide cylinder is a channel structure connecting the outlet to the inner bag. Specifically, it can be implemented using a conical metal tube or an adjustable-angle guide groove to prevent material from deviating from its predetermined trajectory during descent. The horizontal sealing device 23 is a mechanism for heat-sealing the top or bottom of the bag, and the vertical sealing device 24 is a mechanism for heat-sealing the sides of the bag. This can be achieved using a heating strip combined with a pressure cylinder to form a sealing line, or using a rotary heat-sealing wheel combined with a guide roller.

[0019] Specifically, the material is transferred from the suction device 11 to the metering device 12 for temporary storage, and discharged through the outlet after reaching the set amount. The guide cylinder receives the material from the outlet and guides it into the inner bag, while the unwinding mechanism 21 continuously conveys the film material. The horizontal sealing device 23 first heat-seals the top of the bag to form the first seal, and the vertical sealing device 24 then continuously seals the two sides to form a three-sided closed structure. After the inner bag is sealed, the bag picking mechanism 31 of the outer bag sealing machine 30 grabs the outer bag from the bag bin, the bag opening mechanism 32 opens the bag opening with a pneumatic suction cup, the feeding mechanism 33 accurately puts the inner bag into the outer bag, and finally the sealing mechanism 34 performs the final sealing on the open end of the outer bag. The main unit synchronously controls the suction, metering, sealing, and transmission actions through a PLC program to ensure tight connection between each process.

[0020] The above technical solutions result in cleaner and more aesthetically pleasing packaging, meeting the market demands of high-end products. The entire process, from material metering to inner and outer bag sealing, is automated, eliminating the risk of contamination caused by manual intervention. The three-side sealing structure ensures sealing strength while improving the packaging bag's compression resistance, making it suitable for the transportation and storage of fragile or powdery materials.

[0021] In one embodiment, such as Figure 3As shown, the feeding mechanism 33 includes a feeding cylinder 333, and the output end of the guide cylinder, the inner bag station and the feeding cylinder 333 are arranged sequentially from top to bottom and located on the same axis to guide the material to the inner bag and / or the feeding cylinder 333.

[0022] The feed cylinder 333 refers to a container structure used to receive the sealed inner bag and transport it to the outer bag; its inner diameter is adapted to the outer diameter of the inner bag. The feed cylinder output end is positioned close to the feed cylinder so that the end of the feed cylinder and the inlet of the feed cylinder 333 are basically on the same axis.

[0023] Specifically, the output end of the guide cylinder vertically conveys the metered material to the inner bag station. At this point, the inner bag is unwound by the unwinding mechanism 21 and completes horizontal and vertical sealing to form a three-side seal structure. The sealed inner bag falls directly into the outer bag through the discharge cylinder 333. Since the output end of the guide cylinder, the inner bag station, and the discharge cylinder 333 are arranged along the same axis, the material passes through the guide cylinder, the inner bag, and the discharge cylinder 333 sequentially along a straight path under gravity. When it is necessary to switch between inner and outer bag packaging, the discharge cylinder 333 can selectively receive the inner bag or guide it directly to the outer bag.

[0024] Through the above technical solution, this application can package both inner bags into outer bags and bulk granular materials.

[0025] In one embodiment, such as Figure 3 As shown, the feeding mechanism 33 also includes a sliding device 334, a first feeding position 331 and a second feeding position 332, and the feeding cylinder 333 is disposed on the sliding device 334 to switch between the first feeding position 331 and the second feeding position 332.

[0026] The sliding device 334 is a mechanical structure used to support the feeding cylinder 333 and move it along a preset path. Specifically, it can be implemented using a guide rail or slide rail in conjunction with a drive component, such as a cylinder or motor. This device allows the feeding cylinder 333 to flexibly switch between different workstations, thus adapting to various packaging needs. The first feeding position 331 and the second feeding position 332 refer to two fixed positions accessible to the feeding cylinder 333 on the sliding device 334, which can be positioned using limit sensors or mechanical stops.

[0027] Specifically, after the inner bag is sealed on three sides, the feeding cylinder 333 moves to the first feeding position 331 via the sliding device 334, conveying the inner bag into the corresponding outer bag. If it is necessary to switch to another packaging process, the sliding device 334 drives the feeding cylinder 333 to the second feeding position 332, at which point another outer bag can receive the inner bag. Dual-station feeding provides convenience for users.

[0028] In one embodiment, such as Figure 1 and 2As shown, the three-side sealing automatic packaging machine for inner and outer bags includes a feeding mechanism 10, an inner bag sealing machine 20, an outer bag sealing machine 30, and a main unit. The metering device 12 includes a first measuring cup hopper and a second measuring cup hopper, each with a discharge port. The inner bag sealing machine 20 has two stations. The unwinding mechanism 21 includes a first unwinding device 211 and a second unwinding device 212. The transverse sealing device 23 includes a first transverse sealing device 231 and a second transverse sealing device 232. The vertical sealing device 24 includes a first vertical sealing device 241 and a second vertical sealing device 242. The guide cylinder includes a first guide cylinder 221 and a second guide cylinder 222 corresponding to the discharge ports of the measuring cup hoppers. The unloading mechanism 33 includes a first unloading device and a second unloading device, with the first unloading device connected to the first guide cylinder 221 and the second unloading device connected to the second guide cylinder 222.

[0029] The first measuring cup hopper and the second measuring cup hopper refer to two independently set material metering units.

[0030] The first transverse sealing device 231 and the second transverse sealing device 232 refer to two sets of parallel sealing actuators, each corresponding to one of the two workstations to complete the transverse sealing action. The first guide cylinder 221 and the second guide cylinder 222 refer to two material conveying channels, used to guide the material from the two measuring cup hoppers to the corresponding inner bag workstations. The first feeding device and the second feeding device refer to two independent feeding actuators, which can be implemented using a slide rail and pneumatic push rod structure, used to convey the sealed inner bag into the outer bag.

[0031] Specifically, the two measuring cup hoppers are connected to the first guide cylinder 221 and the second guide cylinder 222 respectively through independent discharge ports, allowing materials to enter the inner bags of the two stations simultaneously or alternately. The first unwinding device 211 and the second unwinding device 212 respectively convey the inner bag film to the two stations. The first horizontal sealing device 231 and the first vertical sealing device 241 complete the three-sided sealing of the inner bag at the first station, and the second horizontal sealing device 232 and the second vertical sealing device 242 perform the same operation synchronously at the second station. The sealed inner bag is transferred to the unloading mechanism 33 of the outer bag sealing machine 30 through the corresponding first unloading device or second unloading device, realizing parallel operation of the two stations.

[0032] Through the above technical solution, this application enables continuous production of the inner bag packaging process, avoiding efficiency bottlenecks caused by single-station operation. The combined design of the dual measuring cup hopper and dual guide cylinders supports the synchronous metering and dispensing of different materials, while the dual feeding device ensures seamless connection between the inner and outer bag packaging processes, thereby improving overall packaging speed and equipment utilization.

[0033] In one embodiment of this example, as Figure 2As shown, the first horizontal edge sealing device 231 is set near the first work station, the second horizontal edge sealing device 232 is set near the second work station, the first vertical edge sealing device 241 is set near the first work station, and the second vertical edge sealing device 242 is set near the second work station.

[0034] The first horizontal sealing device 231 refers to a horizontal sealing device located on the side of the first workstation, which can be implemented using a heat sealing device, and is used to horizontally seal the inner bag at the first workstation. The second horizontal sealing device 232 refers to a horizontal sealing device located on the side of the second workstation, which can be implemented using a structure symmetrically arranged with the first horizontal sealing device 231, and is used to independently horizontally seal the inner bag at the second workstation. The first vertical sealing device 241 refers to a vertical sealing device located on the side of the first workstation, and is used to seal the longitudinal edge of the inner bag at the first workstation. The second vertical sealing device 242 refers to a vertical sealing device located on the side of the second workstation, which can be implemented using a layout mirror-symmetrical to the first vertical sealing device 241, and is used to independently seal the longitudinal edge of the inner bag at the second workstation.

[0035] Specifically, after the inner bag at the first station is filled with material, the first horizontal sealing device 231 immediately performs horizontal sealing, while the first vertical sealing device 241 seals the longitudinal edge, forming a complete three-sided sealing structure. During this process, the inner bag at the second station can be filled with material simultaneously, and the second horizontal sealing device 232 and the second vertical sealing device 242 independently complete the sealing operation. The sealing devices at the two stations adopt a spatially isolated layout to avoid interference between actions, allowing the inner bag to complete the three-sided sealing without transferring stations during the horizontal and vertical sealing process.

[0036] This solution equips each workstation with independent horizontal and vertical edge sealing devices, enabling two workstations to perform edge sealing operations simultaneously. While maintaining the advantages of the three-sided edge sealing structure, it further improves work efficiency.

[0037] In one embodiment, the outer bag sealing machine 30 further includes a weighing mechanism 37, which is disposed between the feeding mechanism 33 and the sealing mechanism 34.

[0038] The weighing mechanism 37 is a device for detecting the weight of materials. Specifically, it can be implemented using a combination of a load cell and a support structure. The support structure supports the inner bag, while the load cell collects weight data in real time. By setting a weighing stage after feeding and before sealing, this mechanism can accurately control the weight of the materials placed in the outer bag.

[0039] Specifically, the sealed inner bag is transferred to the weighing mechanism 37 via the feeding mechanism 33. The weighing sensor measures the force applied by the support structure carrying the inner bag and feeds the data back to the control system. If the weight is within the preset range, the inner bag is conveyed to the sealing mechanism 34 for sealing the outer bag; if the weight is abnormal, an abnormality mechanism is triggered, and the outer bag is not sealed.

[0040] Compared to existing technologies, current equipment typically integrates the weighing function into the metering device 12, only controlling the weight of the initial feeding and failing to detect potential material leakage or metering errors after the inner bag is sealed. This solution, by setting up a separate weighing stage, allows for secondary verification before the inner bag is filled into the outer bag, ensuring the accuracy of the final packaging.

[0041] Through the above technical solution, this application solves the problem of uncontrolled material weight after sealing the inner bag, avoids unqualified finished products due to measurement errors or sealing defects, and improves the overall qualification rate of the packaging production line.

[0042] In one embodiment, the outer bag sealing machine 30 further includes an auxiliary bag spreading mechanism 36, which is located between the feeding mechanism 33 and the sealing mechanism 34.

[0043] The auxiliary bag unfolding mechanism 36 is a device used to unfold and position the outer bag. It can be implemented using a robotic arm, guide plate, or pneumatic device, maintaining the opening of the outer bag in an unfolded state through physical contact or airflow. The function of this mechanism is to ensure the outer bag maintains a stable shape during the feeding process, preventing the inner bag from failing to fall accurately due to bag opening closure or misalignment.

[0044] Specifically, when the sealed inner bag is conveyed to the outer bag via the feeding mechanism 33, the auxiliary bag unfolding mechanism 36 pulls the two sides of the outer bag by clamping or adsorption, so that the opening of the outer bag is fully opened. During this process, the inner bag is accurately guided into the outer bag, and then the sealing mechanism 34 seals the outer bag containing the inner bag.

[0045] Through the above technical solution, this application solves the problem of material feeding failure caused by the closure of the outer bag opening, ensures accurate alignment between the inner bag and the outer bag, and improves the yield rate of the sealing process.

[0046] In one embodiment, the outer bag sealing machine 30 further includes a bag opening detection mechanism 35, which is disposed between the bag opening mechanism 32 and the feeding mechanism 33.

[0047] Among them, the bag opening detection mechanism 35 refers to a device used to detect the opening status of the outer bag, which can be implemented by photoelectric sensor, by capturing bag opening shape data in real time and comparing it with preset bag opening standards. The bag opening mechanism 32 refers to a device for opening the outer bag, which can be implemented by a vacuum suction cup assembly and a bag support rod linkage structure, by using negative pressure to suction the two sides of the bag body and open the bag opening.

[0048] Specifically, after the bag opening mechanism 32 completes the opening of the outer bag, the bag opening detection mechanism 35 immediately scans and detects the bag opening degree. If the bag opening is not detected to have reached the predetermined opening angle, the control system will pause the operation of the feeding mechanism 33 and trigger the alarm device; if the bag opening is detected to meet the opening standard, the feeding mechanism 33 will then start to accurately insert the inner bag into the outer bag.

[0049] Through the above technical solution, this application can ensure that each outer bag is fully expanded before feeding, significantly reducing the equipment jamming failure rate caused by bag closure.

[0050] In one specific embodiment, the outer bag sealing machine 30 includes a replacement mechanism, a bag opening mechanism 32, a bag opening detection mechanism 35, a first feeding mechanism 33, a second feeding mechanism 33, an auxiliary bag spreading mechanism 36, a weighing mechanism 37, and a sealing mechanism 34 connected in sequence.

[0051] Compared with related technologies, this application achieves three-sided sealing by using the horizontal and vertical sealing devices of the inner bag sealing machine. Combined with the main unit's coordinated control of the feeding mechanism and the inner and outer bag sealing machines, it solves the problem of poor sealing effect in traditional back-sealing inner bags, offering advantages such as improved packaging aesthetics, enhanced compression resistance, and fully automated control. Furthermore, this application employs a top-down feeding and unloading structure, placing the guide cylinder, inner bag packaging station, and unloading device on the same axis to enable both inner bag-to-outer bag packaging and packaging of bulk granular materials. In addition, this application utilizes a dual-station structure, employing dual guides, dual inner bag sealing, and dual unloading to achieve parallel operation of two stations, further improving work efficiency.

[0052] This application has been described through several embodiments. Those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this application. Furthermore, based on the teachings of this application, these features and embodiments can be modified to suit specific circumstances and materials without departing from the spirit and scope of this application. Therefore, this application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims are protected by this application.

Claims

1. An automatic packaging machine for inner and outer bags with three-side sealing, characterized in that, The packaging machine includes: The feeding mechanism includes a suction device and a metering device. The suction device is used to automatically pick up materials and guide them to the metering device. The metering device is provided with a discharge port. The inner bag sealing machine includes an unwinding mechanism, a material guiding mechanism, and a sealing mechanism. The material guiding mechanism includes a material guiding cylinder, the input end of which is connected to the material outlet to receive the material from the material outlet and guide it into the inner bag at the output end. The unwinding mechanism is used to transport the inner bag to the work station. The sealing mechanism includes a horizontal sealing device and a vertical sealing device for sealing the three sides of the inner bag. The outer bag sealing machine includes a bag picking mechanism, a bag opening mechanism, a material feeding mechanism and a sealing mechanism connected in sequence. The material feeding mechanism is used to receive the sealed inner bag and transport it into the outer bag. The main unit is electrically connected to the feeding mechanism, the inner bag sealing machine, and the outer bag sealing machine.

2. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 1, characterized in that, The feeding mechanism includes a feeding cylinder, and the output end of the guide cylinder, the inner bag station and the feeding cylinder are arranged sequentially from top to bottom and located on the same axis to guide the material to the inner bag and / or the feeding cylinder.

3. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 2, characterized in that, The feeding mechanism further includes a sliding device, a first feeding position and a second feeding position, and the feeding cylinder is disposed on the sliding device to switch between the first feeding position and the second feeding position.

4. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 1 or 2, characterized in that, The metering device includes a first measuring cup hopper and a second measuring cup hopper, each measuring cup hopper having a discharge port; the inner bag sealing machine has two stations; the unwinding mechanism includes a first unwinding device and a second unwinding device; the transverse sealing device includes a first transverse sealing device and a second transverse sealing device; the vertical sealing device includes a first vertical sealing device and a second vertical sealing device; the guide cylinder includes a first guide cylinder and a second guide cylinder corresponding to the discharge port of the measuring cup hopper; the feeding mechanism includes a first feeding device and a second feeding device, the first feeding device being connected to the first guide cylinder and the second feeding device being connected to the second guide cylinder.

5. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 4, characterized in that, The first horizontal edge sealing device is located near the first workstation, the second horizontal edge sealing device is located near the second workstation, the first vertical edge sealing device is located near the first workstation, and the second vertical edge sealing device is located near the second workstation.

6. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 1, characterized in that, The outer bag sealing machine also includes a weighing mechanism, which is located between the feeding mechanism and the sealing mechanism.

7. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 1, characterized in that, The outer bag sealing machine also includes an auxiliary bag unfolding mechanism, which is located between the feeding mechanism and the sealing mechanism.

8. The automatic packaging machine for inner and outer bags with three-side sealing according to claim 5, characterized in that, The outer bag sealing machine also includes a bag opening detection mechanism, which is located between the bag opening mechanism and the feeding mechanism.

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