Mouthpiece bag assembly line

Abstract

A kind of suction nozzle bag assembly production line, including, bag body sending mechanism, bag body conveying mechanism, sealing mechanism, it is characterized by: the bag body sending mechanism includes bag body conveying unit, bag body state conversion sending unit, the bag body conveying mechanism includes rack, upper clamping unit, lower clamping unit, two longitudinal tracks, clamping drive mechanism;The sealing mechanism includes multiple sealing units, controllable opening and closing mechanism.The beneficial effects of the prior art of the utility model are that since the bag body sending mechanism is improved, the bag type and size can be quickly adjusted according to the bag type and size needed to be processed;The bag body conveying mechanism is improved;The sealing mechanism is improved, and the corresponding sealing unit can be controlled to give up processing the bag during opening and closing movement when unexpected situation is found.

Description

Technical Field

[0001] This utility model relates to a spout bag assembly production line. Background Technology

[0002] The manufacturing process of spout pouches typically involves first manufacturing the spout and the pouch body separately, and then sending them to the spout pouch assembly line. After the spout is inserted into the opening of the pouch body, a sealing mechanism (usually including at least one sealing device; when multiple sealing devices are used, some are heat-sealing devices and some are cold-sealing devices) is used to seal the spout to the opening of the pouch body, thus completing the assembly of the spout pouch and obtaining the finished spout pouch.

[0003] A horizontal nozzle welding machine, as disclosed in Chinese patent document CN223671988U, includes a frame, a bag picking mechanism, a bag horizontal conveying mechanism, a bag opening mechanism, a nozzle and bag insertion mechanism, at least two heat sealing mechanisms, and a finished product collection mechanism. The frame is characterized by having a bag picking station, a bag opening station, an insertion station, at least one heat sealing temporary parking station, and a finished product collection station arranged sequentially along the bag conveying path. The bag horizontal conveying mechanism includes a horizontal clamping conveying unit and a temporary clamping unit for bag processing. All heat sealing mechanisms are mounted on the horizontal clamping conveying unit, and each heat sealing mechanism corresponds one-to-one with the insertion station and all heat sealing temporary parking stations.

[0004] However, the applicant discovered that the existing spout bag assembly lines (including the aforementioned horizontal spout welding machine) have an unreasonable structure and suffer from the following problems: 1. The bag feeding mechanism can only be used for a single type of spout bag, such as a flat spout bag (the most common type of spout bag, stand-up pouch) or a slanted spout bag (the spout is on a slanted side). Moreover, once the bag shape or size is changed, the equipment needs to be significantly modified, making it very unsuitable for use. 2. Each sealing mechanism cannot be controlled independently. If a certain spout bag semi-finished product has a missing or misaligned spout, the sealing of that spout bag semi-finished product cannot be stopped. 3. The bag conveying mechanism needs to carry a large number of bags, and the bag conveying mechanism is very heavy, so it has a large inertia. This not only consumes a lot of energy, but also has problems such as poor motion accuracy, affecting processing quality, difficulty in reducing scrap rate, and easy equipment damage.

[0005] The aforementioned problems result in the following drawbacks of the spout bag assembly line: high equipment cost, laborious and time-consuming adjustments when changing products, poor bag conveying accuracy, low product quality, difficulty in reducing scrap rate, high energy consumption, and difficulty in reducing production costs. Utility Model Content

[0006] The purpose of this invention is to provide a spout pouch assembly line that can adjust and adapt to changes in the pouch body being processed, and can individually control whether any sealing unit is sealed. The technical solution adopted is as follows: A spout pouch assembly line, including The bag feeding mechanism delivers the bag in a preset state; The bag conveying mechanism receives bags and synchronously and intermittently conveys multiple bags along the longitudinal direction, stopping at each workstation one by one. The sealing mechanism seals the nozzles and bag openings of multiple semi-finished spout bags at least once. Its features are: The bag feeding mechanism includes The bag conveying unit conveys the bags one by one along the longitudinal direction; The bag state conversion and delivery unit converts each bag to a preset state and delivers it to the inlet of the bag conveying mechanism. The bag conveying mechanism includes a frame, an upper clamping unit, a lower clamping unit, two longitudinal tracks, and a clamping drive mechanism. The two longitudinal tracks are respectively installed on the frame and extend along the longitudinal direction of the frame and are arranged opposite each other in the vertical plane (i.e., one longitudinal track is located above the other longitudinal track). The upper clamping unit and the lower clamping unit are slidably installed on the two longitudinal tracks, and the clamping drive mechanism drives the upper clamping unit and the lower clamping unit to move along the two longitudinal tracks respectively. The sealing mechanism includes multiple sealing units and a controllable opening and closing mechanism. This controllable opening and closing mechanism drives all sealing units to synchronously and alternately complete opening and closing actions, and can also control any single sealing unit to not complete the sealing operation during the closing process. When a problem exists with a certain spout pouch semi-finished product (e.g., no spout, incorrect spout position or status), the controllable opening and closing mechanism will control the corresponding sealing unit to not seal the spout pouch semi-finished product during the closing process.

[0007] In a preferred embodiment, the bag state transition and delivery unit includes a first linear reciprocating motion mechanism, a first lifting device, a rotating device, and a bag pick-and-place device. The first linear reciprocating motion mechanism is located above the bag conveying unit, the first lifting device is mounted on the first linear reciprocating motion mechanism, the rotating device is mounted on the first lifting device, and the bag pick-and-place device is mounted on the rotating device.

[0008] In a preferred embodiment, the clamping drive mechanism includes two second linear reciprocating motion mechanisms, which correspond one-to-one with the upper clamping unit and the lower clamping unit, respectively. The two second linear reciprocating motion mechanisms drive the upper clamping unit and the lower clamping unit to reciprocate along two longitudinal tracks.

[0009] A better embodiment is that the second linear reciprocating motion mechanism includes a second servo motor, a second synchronous belt, and multiple pulleys. All pulleys are rotatably mounted on the frame. The second synchronous belt is fitted onto all the pulleys. The second servo motor is mounted on the frame, and the output shaft of the second servo motor is connected to a pulley and drives the pulley to rotate. This pulley drives the second synchronous belt to move, and the second synchronous belt drives the other pulleys to rotate.

[0010] In a preferred embodiment, the sealing unit includes a support frame, a vertical slide rail, an upper sealing device, and a lower sealing device. The support frame is mounted on the machine frame, the vertical slide rail is mounted on the support frame, and the upper sealing device and the lower sealing device are slidably mounted on the vertical slide rail. A controllable opening and closing mechanism is connected to the upper sealing device and the lower sealing device respectively and drives the upper sealing device and the lower sealing device to perform opening and closing movements.

[0011] A better embodiment is that the controllable opening and closing mechanism includes a third servo motor, a drive shaft, and at least one opening and closing group. The drive shaft is rotatably mounted on the bottom of the frame. The third servo motor is mounted on the frame and is connected to the drive shaft to drive the drive shaft to rotate. All opening and closing groups are respectively mounted on the drive shaft. Each opening and closing group corresponds to a sealing unit. Each opening and closing group is connected to the corresponding sealing unit and drives the upper sealing device and lower sealing device of the corresponding sealing unit to perform opening and closing movements.

[0012] In one embodiment, the opening and closing assembly includes a first connecting rod, a second connecting rod, and a control cylinder. The two ends of the first connecting rod are respectively connected to a drive shaft and a corresponding upper sealing device. The two ends of the control cylinder are respectively connected to the drive shaft and the bottom end of the second connecting rod. The top end of the second connecting rod is connected to a corresponding lower sealing device.

[0013] In another embodiment, the opening and closing assembly includes a first connecting rod, a second connecting rod, and a control cylinder. The two ends of the first connecting rod are respectively connected to a drive shaft and a corresponding lower sealing device. The two ends of the control cylinder are respectively connected to the drive shaft and the bottom end of the second connecting rod. The top end of the second connecting rod is connected to a corresponding upper sealing device.

[0014] In a preferred embodiment, the spout bag assembly line further includes a bag calibration mechanism. This mechanism is located at the inlet of the bag conveying mechanism and includes a bag positioning frame, at least one positioning edge, and at least one adjustable positioning unit. The positioning edge and the adjustable positioning unit are respectively mounted on the top surface of the bag positioning frame. The bag calibration mechanism calibrates multiple edges of the bag, thereby ensuring the bag is in a more accurate position.

[0015] In a preferred embodiment, the spout bag assembly line further includes a spout insertion mechanism, which is located in front of the sealing mechanism.

[0016] The advantages of this utility model compared to the prior art are as follows: Due to improvements in the bag feeding mechanism, a bag state conversion and delivery unit is used to deliver bags in the appropriate position. Therefore, adjustments can be made quickly according to the type and size of the bags to be processed. Especially with the addition of a bag calibration mechanism, adjustments are more convenient and faster (meaning that regardless of whether it's a flat-mouth bag or a slanted-mouth bag, changes in bag size or the angle of the slanted edge can be quickly adjusted before processing). The bag conveying mechanism has also been improved, so the drive device only needs to drive the upper and lower clamping units to move along the track, improving motion accuracy and product quality. Furthermore, the sealing mechanism has been improved, with each opening and closing group using a separate control cylinder to control the upper and lower sealing devices of the corresponding sealing unit. If unexpected situations such as missing or misaligned nozzles are detected, the corresponding sealing unit can be controlled to abandon bag processing during the opening and closing motion. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 yes Figure 1 Left view of the embodiment shown; Figure 3 yes Figure 1 The diagram shows the structural schematic of the sealing mechanism in the embodiment shown. Figure 4 yes Figure 3 The left view; Figure 5 yes Figure 1 The diagram shows a schematic of the bag feeding mechanism in the embodiment shown. Figure 6 yes Figure 5 A top view of the bag calibration mechanism; Figure 7 yes Figure 1 The diagram shows a schematic of the bag feeding mechanism in the embodiment shown. Figure 8 yes Figure 7 The left view. Detailed Implementation

[0018] like Figure 1-8 As shown, a spout pouch assembly line in one embodiment of this application includes... The bag feeding mechanism 1 feeds the bag out in a preset state; The bag conveying mechanism 2 receives bags and synchronously and intermittently conveys multiple bags, stopping at each workstation one by one along the longitudinal direction; The sealing mechanism 3 seals the nozzles and bag openings of multiple semi-finished spout bags at least once. The bag feeding mechanism 1 includes The bag conveying unit 101 conveys the bags one by one along the longitudinal direction; The bag state conversion and delivery unit 102 converts the bags one by one to a preset state and delivers them to the inlet of the bag conveying mechanism 2. The bag conveying mechanism 2 includes a frame 201, an upper clamping unit 202, a lower clamping unit 203, two longitudinal rails 204, and a clamping drive mechanism 205. The two longitudinal rails 204 are respectively mounted on the frame 201. The two longitudinal rails 204 extend along the longitudinal direction of the frame 201 and are arranged opposite to each other in the vertical plane (i.e., one longitudinal rail 204 is located above the other longitudinal rail 204). The upper clamping unit 202 and the lower clamping unit 203 are slidably mounted on the two longitudinal rails 204. The clamping drive mechanism 205 drives the upper clamping unit 202 and the lower clamping unit 203 to move along the two longitudinal rails 204. The sealing mechanism 3 includes a controllable opening and closing mechanism 302 and multiple sealing units 301. The controllable opening and closing mechanism 302 drives all sealing units 301 to synchronously and alternately complete the opening and closing actions, and can control any one sealing unit 301 to not complete the sealing work during the closing process. When a certain spout bag semi-finished product has a problem (such as: no spout, or the spout position or state is incorrect), the controllable opening and closing mechanism 302 controls the corresponding sealing unit 301 to not seal the spout bag semi-finished product during the closing process. The preset state refers to the bag state (whether there is an angle between the bag body and the longitudinal direction of the frame) set in advance before feeding. In this embodiment, the spout bag to be processed is a slanted spout bag. Therefore, in order not to change the position of the spout during processing, the bag body needs to be at an angle to the longitudinal direction. When the bag feeding mechanism 1 feeds the bag body, it rotates the bag body in the opposite direction by a preset angle (this preset angle is the same as the slanted angle). At this time, the bag body is in the preset state, and then the bag body is fed in. In other alternative embodiments, when the spout bag to be processed is a flat-mouth bag, the bag body does not need to be rotated; it is already in a preset state and can be fed in. The preset state of the bag body differs depending on the type of spout bag being processed.

[0019] In a preferred embodiment, the bag conveying unit 101 is a conveyor belt.

[0020] like Figure 1-8 As shown, in one alternative embodiment, the conveyor belt is a belt conveyor.

[0021] In one alternative embodiment, the conveyor belt is a chain conveyor belt.

[0022] like Figure 1 , 5As shown in Figure 6, in an optional embodiment, the bag state transition and delivery unit 102 includes a first linear reciprocating motion mechanism 1021, a first lifting device 1022, a rotating device 1023, and a bag picking and placing device 1024. The first linear reciprocating motion mechanism 1021 is disposed above the bag conveying unit 101, the first lifting device 1022 is mounted on the first linear reciprocating motion mechanism 1021, the rotating device 1023 is mounted on the first lifting device 1022, and the bag picking and placing device 1024 is mounted on the rotating device 1023.

[0023] like Figure 1 , 5 As shown in Figure 6, in an alternative embodiment, the first linear reciprocating motion mechanism 1021 is a first synchronous belt conveyor mechanism. The first synchronous belt conveyor mechanism includes a first synchronous belt 10211, the first linear reciprocating motion mechanism 1021 has a first reciprocating motion end 10212, the first reciprocating motion end 10212 is a first slider, the first slider is mounted on the first synchronous belt 10211, and the first lifting device 1022 is mounted on the first slider (first reciprocating motion end 10212).

[0024] like Figure 1 , 5 As shown in Figure 6, in an alternative embodiment, the first lifting device 1022 is a first cylinder. The first lifting device 1022 has a lifting end, and a rotating device 1023 is mounted on the lifting end. The lifting end is the first piston shaft of the first cylinder.

[0025] like Figure 1 , 5 As shown in Figure 6, in an alternative embodiment, the rotating device 1023 is a first servo motor. The rotating device 1023 has a rotating end, and the bag picking and placing device 1024 is mounted on the rotating end. The rotating end is the first output shaft of the first servo motor.

[0026] like Figure 1 , 5 As shown in Figure 6, in an alternative embodiment, the bag taking and placing device 1024 includes a mounting frame 10241 and at least one vacuum suction cup 10242 connected to an external vacuuming device. The mounting frame 10241 is mounted on the rotating device 1023, and the vacuum suction cup 10242 is mounted on the mounting frame 10241.

[0027] like Figure 1 , 5As shown in Figure 6, after the bag feeding mechanism is improved in this embodiment, it can be quickly adjusted according to the type and size of the bag to be processed. Regardless of whether it is a flat bag or a slanted bag, regardless of whether the angle between the slanted side and the top or bottom side of the slanted bag is 30 degrees, 45 degrees or other degrees, and regardless of how the length, width and other parameters of the bag are changed, the bag can be fed in quickly.

[0028] like Figure 1 , 7 As shown in Figure 8, in an alternative embodiment, the clamping drive mechanism 205 includes two second linear reciprocating motion mechanisms 2051. The two second linear reciprocating motion mechanisms 2051 correspond one-to-one with the upper clamping unit 202 and the lower clamping unit 203, respectively. The two second linear reciprocating motion mechanisms 2051 drive the upper clamping unit 202 and the lower clamping unit 203 to reciprocate along two longitudinal tracks 204.

[0029] like Figure 1 , 7 As shown in Figure 8, in an alternative embodiment, the second linear reciprocating motion mechanism 2051 includes a second servo motor 20511, a second synchronous belt 20512, and multiple pulleys 20513. All pulleys 20513 are rotatably mounted on the frame 201. The second synchronous belt 20512 is sleeved on all pulleys 20513. The second servo motor 20511 is mounted on the frame 201, and the output shaft of the second servo motor 20511 is connected to one pulley 20513 and drives the pulley 20513 to rotate. The pulley 20513 drives the second synchronous belt 20512 to move, and the second synchronous belt 20512 drives the other pulleys 20513 to rotate.

[0030] like Figure 1 , 7 As shown in Figure 8, in an alternative embodiment, the two second linear reciprocating motion mechanisms 2051 share a second servo motor 20511.

[0031] like Figure 1 , 7 As shown in Figure 8, in an alternative embodiment, the upper clamping unit 202 includes a second lifting device 2021, an upper suspension beam 2022, and at least one upper clamping member 2023. The second lifting device 2021 is slidably mounted on a corresponding longitudinal track 204. The upper suspension beam 2022 is mounted on the second lifting device 2021. All upper clamping members 2023 are respectively mounted on the upper suspension beam 2022 and all upper clamping members 2023 extend downward. The second lifting device 2021 is a cylinder.

[0032] like Figure 1 , 7As shown in Figure 8, in an alternative embodiment, the upper clamping member 2023 is an upper clamping rod that extends vertically downward, and there are multiple upper clamping rods.

[0033] like Figure 1 , 7 As shown in Figure 8, in an alternative embodiment, the lower clamping unit 203 includes a third lifting device 2031 and a lower clamping rod 2032. The third lifting device 2031 is slidably mounted on the corresponding longitudinal track 204, and the lower clamping rod 2032 is mounted on the third lifting device 2031 and extends longitudinally along the frame 201. The third lifting device 2031 is a cylinder.

[0034] like Figure 1 , 7 As shown in Figure 8, in this embodiment, due to the improvement of the bag conveying mechanism, two tracks are used to support the upper clamping unit and the lower clamping unit respectively, so that the driving device (clamping driving mechanism 205) only needs to drive the upper clamping unit and the lower clamping unit to move along the track, which greatly reduces the wear of parts and extends the life of parts (especially the parts of the driving device).

[0035] like Figure 1-4 As shown, in one alternative embodiment, the sealing unit 301 includes a support frame 3011, a vertical slide rail 3012, an upper sealing device 3013, and a lower sealing device 3014. The support frame 3011 is mounted on the frame 201, and the vertical slide rail 3012 is mounted on the support frame 3011. The upper sealing device 3013 and the lower sealing device 3014 are slidably mounted on the vertical slide rail 3012, respectively. The controllable opening and closing mechanism 302 is connected to the upper sealing device 3013 and the lower sealing device 3014 respectively and drives the upper sealing device 3013 and the lower sealing device 3014 to perform opening and closing movements.

[0036] like Figure 1-4 As shown, in an alternative embodiment, the controllable opening and closing mechanism 302 includes a third servo motor 3021, a drive shaft 3022, and at least one opening and closing group 3023. The drive shaft 3022 is rotatably mounted on the bottom of the frame 201. The third servo motor 3021 is mounted on the frame 201 and is connected to the drive shaft 3022, driving the drive shaft 3022 to rotate. All opening and closing groups 3023 are respectively mounted on the drive shaft 3022. Each opening and closing group 3023 corresponds to a sealing unit 301. Each opening and closing group 3023 is connected to the corresponding sealing unit 301 and drives the upper sealing device 3013 and the lower sealing device 3014 of the corresponding sealing unit 301 to perform opening and closing movements.

[0037] like Figure 1-4As shown, in an alternative embodiment, the opening and closing assembly 3023 includes a first connecting rod 30231, a second connecting rod 30232, and a control cylinder 30233. The two ends of the first connecting rod 30231 are respectively connected to the drive shaft 3022 and the corresponding upper sealing device 3013. The two ends of the control cylinder 30233 are respectively connected to the drive shaft 3022 and the bottom end of the second connecting rod 30232. The top end of the second connecting rod 30232 is connected to the corresponding lower sealing device 3014.

[0038] In another alternative embodiment, the opening and closing assembly 3023 includes a first connecting rod 30231, a second connecting rod 30232, and a control cylinder 30233. The two ends of the first connecting rod 30231 are respectively connected to the drive shaft 3022 and the corresponding lower sealing device 3014. The two ends of the control cylinder 30233 are respectively connected to the drive shaft 3022 and the bottom end of the second connecting rod 30232. The top end of the second connecting rod 30232 is connected to the corresponding upper sealing device 3013.

[0039] like Figure 1-4 As shown in this embodiment, due to the improvement of the sealing mechanism, each opening and closing group uses a separate control cylinder to control the upper and lower sealing devices of the corresponding sealing unit. If unexpected situations such as missing or misaligned nozzles are detected, the corresponding sealing unit can be controlled to abandon processing of the bag body during the opening and closing motion. This can significantly reduce the scrap rate, and nozzle bags that have failed to insert nozzles can be reprocessed as long as they are not damaged.

[0040] like Figure 1 , 5 As shown in Figure 6, in an alternative embodiment, the spout bag assembly line further includes a bag calibration mechanism 4. The bag calibration mechanism 4 is located at the inlet of the bag conveying mechanism 2. The bag calibration mechanism 4 includes a bag positioning frame 401, at least one positioning edge 402, and at least one adjustable positioning unit 403. The positioning edge 402 and the adjustable positioning unit 403 are respectively installed on the top surface of the bag positioning frame 401. The bag calibration mechanism 4 calibrates multiple edges of the bag, thereby ensuring the bag is in a more accurate position. In this embodiment, there are two positioning edges 402 and two adjustable positioning units 403. In this embodiment, the bag calibration mechanism 4 is mounted on the frame 201.

[0041] like Figure 1 , 5As shown in Figure 6, in an alternative embodiment, the adjustable positioning unit 403 includes a second cylinder 4031 and an adjustable limiting member 4032. The second cylinder 4031 is mounted on the top surface of the bag positioning frame 401, and the adjustable limiting member 4032 is mounted on the piston shaft of the second cylinder 4031. The second cylinder 4031 drives the adjustable limiting member 4032 to move along the top surface of the bag positioning frame 401. All adjustable limiting members 4032 cooperate with all positioning edges 402 to complete the calibration of the bag's orientation.

[0042] like Figure 1 , 5 As shown in Figure 6, in this embodiment, a bag calibration mechanism is added. The bag calibration mechanism and the bag feeding mechanism work together to make the adjustment more convenient and faster: the bag state conversion feeding unit feeds out the bag in the appropriate position, and the bag calibration mechanism is used for calibration. Therefore, it can be automatically and quickly adjusted according to the type and size of the bag to be processed. Regardless of whether it is a flat bag or a slanted bag, the size of the bag changes, or the angle of the slanted side of the slanted bag changes, it can be quickly adjusted before processing.

[0043] like Figure 1 , 2 As shown, in an alternative embodiment, the spout bag assembly line further includes a spout insertion mechanism 5, which is disposed in front of the sealing mechanism 3. The spout insertion mechanism 5 can employ existing technology equipment, such as the spout and bag insertion mechanism in Chinese patent document CN223671988U.

[0044] In conclusion, this application has improved the bag feeding mechanism, bag conveying mechanism, and sealing mechanism, optimizing their structure. This not only greatly expands the applicability of the production line, allowing producers to quickly adjust according to market demands and reducing production equipment costs, but also effectively reduces energy consumption and component wear. Furthermore, it can control whether the sealing unit performs sealing processing based on the condition of the semi-finished spout bags after insertion (which can be done through manual observation or inspection by a testing agency) (this can be controlled by a PLC control device receiving the detection signal), effectively reducing the scrap rate and lowering production costs.

[0045] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.

Claims

1. A spout pouch assembly line, comprising: The bag feeding mechanism delivers the bag in a preset state; The bag conveying mechanism receives bags and synchronously and intermittently conveys multiple bags along the longitudinal direction, stopping at each workstation one by one. The sealing mechanism seals the nozzles and bag openings of multiple semi-finished spout bags at least once. Its features are: The bag feeding mechanism includes The bag conveying unit conveys the bags one by one along the longitudinal direction; The bag state conversion and delivery unit converts each bag to a preset state and delivers it to the inlet of the bag conveying mechanism. The bag conveying mechanism includes a frame, an upper clamping unit, a lower clamping unit, two longitudinal tracks, and a clamping drive mechanism. The two longitudinal tracks are respectively installed on the frame and extend along the longitudinal direction of the frame and are arranged opposite each other in the vertical plane. The upper clamping unit and the lower clamping unit are slidably installed on the two longitudinal tracks, and the clamping drive mechanism drives the upper clamping unit and the lower clamping unit to move along the two longitudinal tracks. The sealing mechanism includes multiple sealing units and a controllable opening and closing mechanism. The controllable opening and closing mechanism drives all sealing units to synchronously and alternately complete the opening and closing actions, and can control any sealing unit not to complete the sealing work during the closing process.

2. The spout bag assembly line as described in claim 1, characterized in that: The bag state transition and delivery unit includes a first linear reciprocating motion mechanism, a first lifting device, a rotating device, and a bag picking and placing device. The first linear reciprocating motion mechanism is located above the bag conveying unit, the first lifting device is installed on the first linear reciprocating motion mechanism, the rotating device is installed on the first lifting device, and the bag picking and placing device is installed on the rotating device.

3. The spout bag assembly line as described in claim 1, characterized in that: The clamping drive mechanism includes two second linear reciprocating motion mechanisms, which correspond one-to-one with the upper clamping unit and the lower clamping unit, respectively. The two second linear reciprocating motion mechanisms drive the upper clamping unit and the lower clamping unit to reciprocate along two longitudinal tracks.

4. The spout bag assembly line as described in claim 3, characterized in that: The second linear reciprocating motion mechanism includes a second servo motor, a second synchronous belt, and multiple pulleys. All pulleys are rotatably mounted on the frame. The second synchronous belt is fitted onto all the pulleys. The second servo motor is mounted on the frame, and the output shaft of the second servo motor is connected to a pulley and drives the pulley to rotate. The pulley drives the second synchronous belt to move, and the second synchronous belt drives the other pulleys to rotate.

5. The spout bag assembly line as described in any one of claims 1-4, characterized in that: The sealing unit includes a support frame, a vertical slide rail, an upper sealing device, and a lower sealing device. The support frame is mounted on the machine frame, and the vertical slide rail is mounted on the support frame. The upper sealing device and the lower sealing device are slidably mounted on the vertical slide rail. The controllable opening and closing mechanism is connected to the upper sealing device and the lower sealing device respectively and drives the upper sealing device and the lower sealing device to perform opening and closing movements.

6. The spout bag assembly line as described in claim 5, characterized in that: The controllable opening and closing mechanism includes a third servo motor, a drive shaft, and at least one opening and closing group. The drive shaft is rotatably mounted on the bottom of the frame. The third servo motor is mounted on the frame and is connected to the drive shaft, driving the drive shaft to rotate. All opening and closing groups are respectively mounted on the drive shaft. Each opening and closing group corresponds to a sealing unit. Each opening and closing group is connected to the corresponding sealing unit and drives the upper sealing device and lower sealing device of the corresponding sealing unit to perform opening and closing movements.

7. The spout bag assembly line as described in claim 6, characterized in that: The opening and closing assembly includes a first connecting rod, a second connecting rod, and a control cylinder. The two ends of the first connecting rod are respectively connected to a drive shaft and a corresponding upper sealing device. The two ends of the control cylinder are respectively connected to the drive shaft and the bottom end of the second connecting rod. The top end of the second connecting rod is connected to a corresponding lower sealing device. Alternatively, the opening and closing assembly includes a first connecting rod, a second connecting rod, and a control cylinder. The two ends of the first connecting rod are respectively connected to a drive shaft and a corresponding lower sealing device. The two ends of the control cylinder are respectively connected to the drive shaft and the bottom end of the second connecting rod. The top end of the second connecting rod is connected to a corresponding upper sealing device.

8. The spout bag assembly line as described in claim 1, characterized in that: The spout bag assembly line also includes a bag calibration mechanism, which is located at the entrance of the bag conveying mechanism. The bag calibration mechanism includes a bag positioning frame, at least one positioning edge, and at least one adjustable positioning unit. The positioning edge and the adjustable positioning unit are respectively installed on the top surface of the bag positioning frame.

9. The spout bag assembly line as described in claim 1, characterized in that: The spout bag assembly line also includes a spout insertion mechanism, which is located in front of the sealing mechanism.

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