Automatic packaging system and automatic packaging method of a bandana mask

Abstract

The application discloses an automatic packaging system and method for a bandage mask, and belongs to the technical field of sanitary product production equipment. The system comprises a rack, a feeding device, a packaging bag discharging device, a primary bag opening device, a secondary bag opening device, a bag moving device, a visual detection device and a sealing device. The feeding device comprises a stock bin conveying structure, a material receiving mechanism, a clamping and conveying structure and a material pressing structure. The stock bin conveying structure comprises a feeding horizontal translation mechanism, a stock bin, two opposite-inserting partition plates, a telescopic pressing rod and a backstop. The secondary bag opening device is used for opening and pulling the packaging bag in the left-right direction to perform secondary bag opening. The primary bag opening device is used for conveying the packaging bag forward and performing primary bag opening by pulling the front part of the packaging bag in the vertical direction. The visual detection device is used for visually detecting the front end of the packaging bag. The bag moving device is used for sequentially sending the packaging bag from the transfer station to the detection station and the sealing station and sending it out, and is also used for exhausting the packaging bag.

Description

Technical Field

[0001] This invention belongs to the technical field of hygiene product manufacturing equipment, and specifically relates to an automatic packaging system and method for tie-on face masks. Background Technology

[0002] Tie-on nonwoven masks are protective gear made of a composite of nonwoven fabric and polypropylene meltblown fabric. Some models use pure cotton degreased gauze or knitted fabric. Tie-on nonwoven masks can be bagged manually or automatically. If bagged manually, due to the characteristics of tie-on masks, the length of the straps is usually about 500mm exposed. The mask is 195mm long and 95mm wide. Manually folding the ear loops three times to straighten them before bagging is relatively easy for single masks. However, when multiple masks are stacked, the difficulty of manual operation is extremely high. It is very easy for the bagged masks to be stacked unevenly, with multiple masks having exposed ear loops, resulting in low bagging efficiency.

[0003] In the prior art, there are also automated bagging equipment. For example, patent application number CN202120630487.7 discloses a fully automatic tie-on mask production and packaging machine, which includes a base material rack, a main body machine that can form masks on one side of the material rack, a distributor that can dispense masks on one side of the main body machine, a tie-on machine that can weld tie-on straps onto masks on both sides of the distributor, and a boxing machine that can pack masks into boxes on one side of the tie-on machine.

[0004] For example, patent application number CN201721004849.1 discloses an automatic packaging machine for tie-on masks, including: a frame mechanism, a column mechanism disposed on one side of the frame mechanism, a pressing mechanism slidably disposed on the column mechanism, a limiting structure disposed on one side of the column mechanism and below the pressing mechanism, and further including: a conveying mechanism connected to the column mechanism, the conveying mechanism including: rotating wheels respectively disposed on opposite sides of the column mechanism, and rotating belts respectively disposed on the rotating wheels, the frame mechanism including: a frame body, a sliding plate disposed on the frame body, and a second driving structure disposed on the frame body and connected to the sliding plate.

[0005] For stacks of multiple masks (e.g., 5-20 pieces), the multiple tie-on masks are in a fluffy state, which makes them easy to pile up and become messy, and the tie-on may fold over, increasing the difficulty of sealing them later (e.g., the tie-on may fold over and protrude from the seal). In addition, because of the tie-on, when sealing, the tie-on may be located at the seal or protrude from the seal, which may cause the seal to press on the ear loops. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an automated packaging system and method for tie-on face masks. During the material receiving and feeding process, the mask stack is kept compacted to prevent scattering and folding of the tie straps, ensuring effective sealing. A visual inspection device is used to inspect the sealed area. The technical solution is as follows:

[0007] On one hand, embodiments of the present invention provide an automatic packaging system for tie-on face masks. This system includes a frame, a feeding device, a bag discharging device, a primary bag opening device, a secondary bag opening device, a bag transfer device, a visual inspection device, and a sealing device. The feeding device is located at the front of the frame and includes a hopper conveying structure, a receiving mechanism, a clamping structure, and a pressing structure. The hopper conveying structure includes a lateral feeding mechanism arranged in the left-right direction, a hopper on the lateral feeding mechanism that can move left-right, two interlocking partitions on the left and right sides of the bottom of the hopper, a telescopic pressure rod on the left or right side of the hopper, and an anti-backflow baffle that can move up and down. The left and right ends of the lateral feeding mechanism... The device comprises a receiving end and a clamping end, respectively. The receiving mechanism and the clamping structure are located directly in front of the receiving end and the clamping end, respectively. The telescopic pressure rod presses the mask stack in the hopper tightly. The clamping structure can clamp the upper and lower sides of the mask stack and feed it backward from the lower rear side of the hopper. The pressing structure is located directly above the hopper at the clamping end and can move up and down. The anti-backflow baffle is located directly behind the hopper at the clamping end. When the clamping structure feeds, the telescopic pressure rod and the interlocking partition are both in a retracted state, and the pressing structure presses against the upper side of the clamping structure. When the clamping structure returns to its original position, the anti-backflow baffle descends to prevent the mask stack from moving forward with the clamping structure. The secondary opening... The bag-opening device is located directly behind the hopper at the clamping end. It can insert into the left and right ends of the front end of the packaging bag and open it by pulling it in opposite directions for a secondary bag opening. The primary bag opening device is arranged in the front-back direction and is located directly behind the secondary bag opening device. It can move in the front-back direction and is used to convey the packaging bag forward and open it by pulling the front part of the packaging bag vertically. The packaging bag discharge device is located at the rear of the frame, next to the rear end of the primary bag opening device, and is used to output the packaging bag to the primary bag opening device. The sealing device is arranged side by side with the front end of the primary bag opening device and is located at the sealing station of the bag transfer device. The visual inspection... The device is located at the inspection station of the bag transfer device and is used to visually inspect the front end of the packaging bag. The bag transfer device is arranged in a left-right direction and has a handover station, an inspection station, and a sealing station in sequence along the conveying direction of the packaging bag. It is used to send the packaging bag from the handover station to the inspection station and the sealing station in sequence and then send it out. It is also used to vent the packaging bag. When the packaging bag is at the front end of the primary bag opening device, the front end of the packaging bag is inserted into the secondary bag opening device. The rear part of the clamping structure passes through the secondary bag opening device and is inserted into the packaging bag for bagging. After bagging is completed, the packaging bag moves backward a predetermined distance to the handover station and separates from the secondary bag opening device.

[0008] In this embodiment of the invention, the hopper is a rectangular trough that cooperates with the mask stack. It is arranged along the front-to-back direction, with open top, front, and bottom sides, and a discharge port at the lower rear side. Its bottom is fixed to the feeding transverse slide of the feeding transverse translation mechanism. Two interlocking partitions can retract or extend synchronously. When the two interlocking partitions are retracted, they are located on the left and right sides of the mask stack, respectively. When the two interlocking partitions are extended, they are moved inward into the hopper, with their inner ends abutting or adjacent to each other to form the bottom plate of the hopper. The interlocking partitions are horizontally arranged along the left-to-right direction and can move left and right, with a gap between them and the feeding transverse slide. The telescopic pressure rod is arranged along the left-to-right direction and can move left and right. When the telescopic pressure rod is retracted... In the extended state, the telescopic pressure rod is located on the left or right side of the mask stack; when the telescopic pressure rod is in the extended state, it moves inward to the hopper and is positioned above the mask stack; the receiving mechanism includes a receiving plate that can move forward and backward and vertically, the receiving plate being arranged in the forward and backward direction and located directly in front of the hopper at the receiving end; during receiving, the receiving plate is in a high position and moves backward to directly above the hopper, at which time the telescopic pressure rod is in the retracted state, the two interlocking partitions are in the extended state, the top of the mask stack is pressed between the receiving plate and the folding chamber and moves downward with the receiving plate into the hopper; after receiving, the receiving plate returns to its original position, and the telescopic pressure rod returns to the extended state; when the hopper moves left and right, the telescopic pressure rod and the two interlocking partitions... All plates are in an extended state; the clamping structure includes a clamping longitudinal translation mechanism arranged in the front-to-back direction and a fixed clamping plate and a movable clamping plate on the rear side of the clamping longitudinal slide; the movable clamping plate and the fixed clamping plate are arranged side by side, both in the front-to-back direction, both located directly in front of the hopper at the clamping end, and both can be inserted into and pass through the hopper; the movable clamping plate can move up and down; the discharge port allows the movable clamping plate and the fixed clamping plate and the mask stack between them to pass backward; when the clamping structure feeds material, the clamping longitudinal slide moves backward, and the rear ends of the fixed clamping plate and the movable clamping plate move backward into the hopper, the rear end of the fixed clamping plate is located adjacent to and below the interlocking partition, and the rear end of the movable clamping plate is located adjacent to and above the telescopic pressure rod; then, the The movable clamping plate moves downwards, and simultaneously, the telescopic pressure rod and the two interlocking partitions retract. The pressing structure moves downwards and presses against the upper side of the movable clamping plate. The movable clamping plate moves downwards to its lowest position, and the mask stack is clamped between the movable clamping plate and the fixed clamping plate. The clamping longitudinal slide continues to move backwards, and the movable clamping plate and the fixed clamping plate extend backwards through the discharge port and are inserted into the packaging bag. Then, the anti-backflow baffle descends, and the clamping longitudinal slide moves forward again, allowing the rear end of the movable clamping plate to reach the front end of the mask stack, while the movable clamping plate moves upwards. Simultaneously, the pressing structure returns to its upward position. Then, the movable clamping plate moves downwards to clamp the front end of the mask stack. Simultaneously, the pressing structure moves downwards, and the anti-backflow baffle returns to its upward position.Then, the clamping longitudinal slide moves backward to convey the mask stack backward. Finally, the clamping longitudinal slide returns to its forward position, and the pressing structure returns to its upward position.

[0009] Furthermore, in this embodiment of the invention, a portal frame is provided directly behind the hopper at the clamping end, and the portal frame is arranged in a left-right direction; the pressing structure is located on the front side of the top beam of the portal frame, and two pressing rollers are arranged side by side at its bottom; multiple support rollers are provided on the frame and below the fixed clamping plate, the support rollers are located in front of the hopper at the clamping end, the fixed clamping plate is slidably mounted on the support rollers, and multiple hopper rollers are provided on the feed transverse slide block and inside the hopper; the hopper rollers, pressing rollers, and support rollers are all arranged in a left-right direction; two The pressing rollers are located directly above the left and right sides of the movable clamping plate, respectively. When the pressing structure is in the low position, the pressing rollers press against the upper side of the movable clamping plate. A strip-shaped notch is provided at the rear of the movable clamping plate and directly below the two pressing rollers. The strip-shaped notch is arranged in the front-to-back direction and opens to the rear. The anti-backflow baffle is arranged vertically, located above the discharge port, directly above the secondary bag opening device, and directly above the strip-shaped notch. When the anti-backflow baffle is in the low position, it is inserted into the strip-shaped notch to prevent the mask stack from moving forward with the clamping structure.

[0010] In this embodiment of the invention, the packaging bag dispensing device is located on the left or right side of the rear end of the primary bag opening device and includes a bag storage rack that can rise in a step-like manner and a bag infeed suction cup assembly directly above the bag storage rack that can move left and right and vertically. Multiple packaging bags are stacked vertically on the bag storage rack, arranged in a front-to-back direction. The bag infeed suction cup assembly can only pick up one packaging bag at a time, and its lower side is equipped with a suction cup for transferring the packaging bag from the bag storage rack to the rear end of the primary bag opening device. A predetermined number of packaging bags are fed by the bag infeed suction cup assembly. After the package is transferred, the storage bag rack rises to bring the height of the top packaging bag to a predetermined height. The primary bag opening device includes a longitudinal translation mechanism for bag opening arranged in the front-to-back direction and a gripper assembly on the longitudinal slide of bag opening. When the gripper assembly is located at the rear end, the bag inlet suction cup assembly and the gripper assembly are arranged opposite to each other and cooperate to realize the transfer of the packaging bag. The gripper assembly includes a bag opening gripper and a clamping gripper arranged side by side. Both the bag opening gripper and the clamping gripper can clamp the upper and lower sides of the packaging bag, and can clamp the bag respectively. The bag has a front and rear section; suction cups are provided on opposite sides of the two gripping arms of the bag-opening gripper; when feeding the bag, the bag-infeed suction cup assembly moves toward the gripper assembly. At this time, the gripper assembly is located at the rear end and its two gripping arms are in an open state; the front and rear sections of the bag are respectively located at the bag-opening gripper and the clamping gripper. The clamping gripper clamps the bag, the bag-infeed suction cup assembly releases the bag and returns to its original position, and then the bag-opening longitudinal slide moves forward. The bag-opening gripper first clamps and then opens, and the suction cups on it... The process begins with opening the bag once. When the longitudinal slide of the bag opening mechanism reaches the front end, the front end of the packaging bag is opened and placed onto the secondary bag opening device, and then the clamping jaws are released. The clamping and conveying structure then fills the bag. After the bag is filled, the longitudinal slide of the bag opening mechanism moves backward to the handover station, where the clamping jaws clamp the packaging bag. At the handover station, the clamping jaws release, the suction cups of the bag opening jaws cease operation, and the packaging bag is handed over to the bag transfer device. After the handover is completed, the longitudinal slide of the bag opening mechanism moves backward to return to its original position.

[0011] In this embodiment of the invention, the bag-transferring device includes a lateral translation mechanism arranged in the left-right direction, a bag-transferring suction cup assembly that can move up and down on the lateral slide of the lateral translation mechanism, a support assembly above the bag-transferring suction cup assembly, and an exhaust assembly that can move up and down directly above the support assembly; the bag-transferring suction cup assembly, the support assembly, and the exhaust assembly are all arranged in the left-right direction; the end of the bag-transferring suction cup assembly near the primary bag-opening device cooperates with the gripper assembly to realize the transfer of the packaging bag, and a receiving suction cup group is provided on the upper side of the end near the primary bag-opening device, a transfer suction cup group is provided on the upper side of the middle part, and a push plate is provided on the upper side of the other end; the two ends of the support assembly and the exhaust assembly are respectively located at the detection station and the sealing station; during the handover, the The receiving suction cup assembly is located at the handover station and below the packaging bag on the gripper assembly. The transfer suction cup assembly is located at the inspection station, and the pusher plate is located at the sealing station near the primary bag opening device. After the bag transfer suction cup assembly moves horizontally, the receiving suction cup assembly is located at the inspection station, and the transfer suction cup assembly is located at the sealing station. The pusher plate pushes the packaging bag at the sealing station away from the support assembly. The packaging bag is relay-style transported through the left-right and vertical movements of the bag transfer suction cup assembly. When the bag transfer suction cup assembly is in a high position, the suction cup assembly on it is located below the packaging bag and is working. At the handover station, the bag transfer suction cup assembly is in a high position, and the upper side of the receiving suction cup assembly contacts the packaging bag to achieve handover. The packaging bags at the inspection station and the sealing station... The bagging process is located between the support assembly and the venting assembly. When the bag-transfer suction cup assembly is in a low position, the packaging bags at the detection and sealing stations are placed on the support assembly. When the bag-transfer suction cup assembly is in a high position, the upper sides of the receiving suction cup group and the transfer suction cup group are higher than the support assembly, and the packaging bags at the detection and sealing stations are located above the support assembly. The venting assembly is located directly above the packaging bags. When the venting assembly is in a low position, it presses against the upper side of the packaging bags to vent air. The upper end of the push plate is always located above the support assembly. The support assembly includes a short support plate and two long support plates, both of which are horizontally arranged in the left-right direction. The short support plate is located at the sealing station, which is located at the sealing device. Directly behind, it is located on the lower front side of the packaging bag at the sealing station, and directly in front of the long support plate near the sealing device end, shorter than the long support plate; two long support plates are arranged side by side, located on the lower side of the middle and rear of the packaging bag respectively, and directly below the exhaust assembly; at the inspection station, when the bag transfer suction cup assembly is in a low position, the packaging bag is placed on the two long support plates; at the sealing station, when the bag transfer suction cup assembly is in a low position, the front of the packaging bag is placed on the short support plate, and the middle and rear parts are placed on the two long support plates respectively; the suction cups on the receiving suction cup group and the transfer suction cup group are arranged alternately with the three support plates to allow the bag transfer suction cup assembly to move left and right; the visual inspection device includes a camera and a light source;The camera is located directly above the front end of the packaging bag at the inspection station, above the exhaust assembly, and vertically downwards; the light source is located directly below the camera, below the support assembly.

[0012] In this embodiment of the invention, the sealing device is located directly in front of the packaging bag at the sealing station and can move back and forth. The sealing device includes a sealing slide that can move back and forth, a sealing bracket on the sealing slide, an upper sealing head that can move up and down behind the sealing bracket, a lower sealing head that can move up and down behind the sealing bracket, and two adjusting grippers behind the sealing bracket. The upper and lower sealing heads are both arranged in the left-right direction and cooperate with the front end of the packaging bag, located above and below the packaging bag respectively. The two adjusting grippers are arranged opposite each other and can move apart in the left-right direction. The two sorting jaws are located directly in front of the left and right ends of the packaging bag at the sealing station; the sorting jaws can clamp the upper and lower sides of the packaging bag and are located adjacent to the rear of the upper and lower sealing heads; when the sealing slide moves to the rear end; the upper and lower sealing heads are located directly above and below the front end of the packaging bag at the sealing station, respectively, and can move toward the packaging bag and press against the corresponding sides of the packaging bag; the short support plate is located adjacent to the rear of the two sorting jaws; before sealing, the two sorting jaws clamp the left and right ends of the packaging bag respectively and move apart to sort the front end of the packaging bag.

[0013] Specifically, in this embodiment of the invention, the bag-feeding suction cup assembly is a U-shaped structure arranged in the left-right direction and facing the opening of the primary bag-opening device, with two suction cups arranged side by side on each of its two arms; the bag-opening gripper and clamping gripper are U-shaped structures arranged in the left-right direction and facing the opening of the packaging bag discharge device, with two suction cups arranged side by side on each of the two clamping arms of the bag-opening gripper; when the bag-feeding suction cup assembly moves toward the primary bag-opening device, its two arms are respectively located at the opening of the upper clamping arm of the bag-opening gripper and the clamping gripper; the end of the front long support plate near the sealing device is mounted on the frame via a column, the column being vertically arranged and located below the corresponding long support plate; the end of the bag-transferring suction cup assembly near the primary bag-opening device has two short arms arranged side by side, and the other end has two short arms arranged side by side. The device comprises two long arms; both the short and long arms are arranged in a left-right direction; the receiving suction cup group and the transfer suction cup group each include two suction cups arranged side by side; the two suction cups of the receiving suction cup group are respectively located at the ends of the two short arms; there are two push plates, each located at the end of the two long arms, and the push plates are perpendicular to the long arms; the distance between the handover station and the inspection station is equal to the distance between the inspection station and the sealing station; the distance between the receiving suction cup group and the transfer suction cup group is equal to the distance between the handover station and the inspection station and is greater than the distance between the transfer suction cup group and the push plate; when the receiving suction cup group is located at the handover station, the two short arms are respectively located in the openings of the lower clamping arms of the bag opening gripper and the clamping gripper; when the receiving suction cup group is located at the inspection station, the column is located between the two long arms.

[0014] Furthermore, in this embodiment of the invention, a horizontal plate is provided between the two vertical beams of the portal frame; the horizontal plate is arranged in the left-right direction and is located adjacent to the rear of the lower part of the hopper at the clamping end, and a rectangular hole is provided on its upper left-right direction for the movable clamping plate and the fixed clamping plate and the mask stack between them to pass through backward; the secondary bag opening device and the anti-backflow baffle are both located on the rear side of the horizontal plate, the movable clamping plate is located directly above the center of the rectangular hole, and the secondary bag opening device includes two bag opening components that move synchronously towards each other or away from each other in the left-right direction; the two bag opening components are respectively located at the left and right ends of the front end of the packaging bag, and are respectively located at the left and right ends of the rectangular hole, and their away movement realizes secondary bag opening.

[0015] Specifically, in this embodiment of the invention, the primary bag opening device is located on the right side of the frame, the sealing device is located on the left side of the frame, the bag opening gripper and the clamping gripper are located on the left side of the bag opening longitudinal translation mechanism, the packaging bag discharge device is located on the left side of the primary bag opening device, and the fixed clamping plate and the movable clamping plate are both located on the right side of the clamping longitudinal translation mechanism; the right end of the feeding device is the receiving end, and its left end is the clamping end; the handover station, the detection station and the sealing station are arranged sequentially from right to left, the receiving suction cup assembly is located on the right end of the bag transfer suction cup assembly, and the push plate is located on the left end of the bag transfer suction cup assembly.

[0016] On the other hand, embodiments of the present invention also provide an automatic packaging method for tie-on face masks, the method comprising: Packaging bag feeding: The bag feeding suction cup assembly moves toward the gripper assembly. At this time, the gripper assembly is located at the rear end and its two gripping arms are in the open state. The front and rear parts of the packaging bag are respectively located at the bag opening gripper and the clamping gripper. The clamping gripper clamps the packaging bag, the bag feeding suction cup assembly releases the packaging bag and returns to its original position. Then, the bag opening longitudinal slide moves forward, the bag opening gripper clamps and then opens, and the suction cup on it works to open the bag once.

[0017] When the longitudinal slide of the bag opening device reaches the front end, the front end of the packaging bag is open and placed on the secondary bag opening device. The secondary bag opening device performs a secondary bag opening, and then the clamping jaws are released.

[0018] Mask feeding and bagging: When receiving materials, the receiving plate is in a high position and moves backward to directly above the material hopper. At this time, the telescopic pressure bar is in the retracted state, the two interlocking partitions are in the extended state, and the top of the mask stack is pressed between the receiving plate and the folding chamber and moves downward into the material hopper with the receiving plate. After receiving the materials, the receiving plate returns to its original position, and the telescopic pressure bar becomes extended.

[0019] The hopper moves from the receiving end to the clamping end, with the telescopic pressure rod and the two interlocking partitions in an extended state.

[0020] During feeding, the longitudinal slide of the clamping device moves backward, and the rear ends of the fixed clamping plate and the movable clamping plate move backward into the hopper. The rear end of the fixed clamping plate is located below the adjacent interlocking partition, and the rear end of the movable clamping plate is located above the adjacent telescopic pressure rod. Then, the movable clamping plate moves downward. At the same time, the telescopic pressure rod and the two interlocking partitions are retracted. The pressing structure moves downward and presses against the upper side of the movable clamping plate. The movable clamping plate moves downward to the low position, and the mask stack is clamped between the movable clamping plate and the fixed clamping plate.

[0021] During bagging, the clamping longitudinal slide continues to move backward, the movable clamp and the fixed clamp extend backward through the discharge port and are inserted into the packaging bag. Then, the anti-backflow baffle descends, and the clamping longitudinal slide moves forward again, bringing the rear end of the movable clamp to the front end of the mask stack, while the movable clamp moves upward. At the same time, the pressing structure returns to its upward position. Then, the movable clamp moves downward to clamp the front end of the mask stack. At the same time, the pressing structure moves downward, and the anti-backflow baffle returns to its upward position. Then, the clamping longitudinal slide moves backward again to convey the mask stack backward. Finally, the clamping longitudinal slide returns forward, and the pressing structure returns to its upward position.

[0022] After the bagging is completed, the longitudinal slide of the bag opening unit moves backward to the handover station.

[0023] Transfer and inspection: During handover, the receiving suction cup assembly is located at the handover station and is located on the lower side of the packaging bag on the gripper assembly. At this time, the receiving suction cup assembly is in a high position; the clamping gripper is released, and the suction cup of the bag opening gripper is not working; after the handover is completed, the bag opening longitudinal slide moves backward to return to its original position.

[0024] The bag-transfer suction cup assembly moves horizontally and then downwards to a low position. The pusher plate pushes the packaging bag at the sealing station away from the support assembly. The transfer suction cup assembly is located at the sealing station and transfers the packaging bag at the inspection station to the sealing station. The receiving suction cup assembly is located at the inspection station and transfers the packaging bag at the handover station to the inspection station. At the inspection station, the packaging bag is placed on the support assembly. The exhaust assembly descends to exhaust air from the packaging bag. The vision inspection device performs visual inspection on the front end of the packaging bag. At the same time, the bag-transfer suction cup assembly returns to its original position.

[0025] Sealing: At the sealing station, the front part of the packaging bag is placed on a short support plate, while the middle and rear parts are placed on two long support plates respectively; the venting assembly descends to vent and clamp the packaging bag; the sealing slide moves backward, and the two sorting jaws clamp the left and right ends of the packaging bag respectively and move apart to sort the front end of the packaging bag; after sorting, the upper and lower sealing ends move toward the packaging bag to seal it; after sealing, the two sorting jaws release, the upper and lower sealing ends return to their original positions, and the sealing slide moves forward to its original position.

[0026] Material discharge: After sealing is completed, the left and right movement of the bag transfer suction cup assembly allows the pusher plate to push the packaging bag at the sealing station away from the support assembly.

[0027] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: (1) It automatically completes the bagging and sealing of the tie-on masks, with a high degree of automation; (2) When feeding the mask stack, press it tightly into bags throughout the process to effectively ensure that the ear loops do not come apart; (3) Design a primary bag opening device and a secondary bag opening device. The primary bag opening device includes a bag opening gripper and a clamping gripper to ensure a good opening effect of the packaging bag. The clamping gripper ensures the success rate of feeding (when the packaging bag discharge device feeds the packaging bag, the clamping gripper clamps the packaging bag) and the stability of the packaging bag moving forward. (4) The feeding process of the mask stack is specially designed, including designing anti-backflow baffles, clamping structure for two feedings (clamping the front end of the mask stack during the second feeding), designing pressing structure (pressing the mask stack during clamping so that it will not fall apart), and slightly retracting after bagging to separate from the secondary bag opening device, etc. (5) This system is equipped with visual inspection before sealing to avoid material loss and waste caused by the ear loops leaking out before sealing; (6) The bag transfer device is specially designed and adopts a relay conveying method. The bag transfer suction cup assembly only needs to move left and right and up and down repeatedly to move the packaging bag sequentially and discharge it in three stations. At the same time, the packaging bag is vented (to ensure the stability of visual inspection during visual inspection) and clamped (to ensure the stability of sealing during sealing). The packaging bag is vented twice. (7) Special designs are made for the bag inlet suction cup assembly, bag opening gripper, clamping gripper and bag transfer suction cup assembly to avoid interference; (8) Add a sorting claw to the sealing part (used in conjunction with a short support plate) to effectively flatten the bag sealing part and facilitate sealing. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the automatic packaging system for tie-on face masks provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the feeding device; Figure 3 This is a schematic diagram of the silo conveyor structure; Figure 4 This is a schematic diagram of the combination of the silo conveying structure and the clamping structure; Figure 5 yes Figure 1 A structural diagram of the components other than the frame and feeding device; Figure 6 This is a schematic diagram of the structure of a one-time bag opening device; Figure 7 This is a structural diagram of the combination of bag transfer device, visual inspection device and sealing device; Figure 8 This is a structural diagram of the combination of the bag transfer device and the sealing device; Figure 9 This is a right view of the combination of the bag transfer device and the sealing device; Figure 10 This is a schematic diagram of the bag transfer suction cup assembly; Figure 11 This is a schematic diagram of the sealing device; Figure 12 This is a structural diagram of the combination of the clamping structure, the secondary bag opening device, and the pressing structure; Figure 13 This is a schematic diagram of the secondary bag opening device.

[0029] In the diagram: 1. Frame, 2. Feeding device, 3. Packaging bag discharging device, 4. Primary bag opening device, 5. Secondary bag opening device, 6. Bag transfer device, 7. Vision inspection device, 8. Sealing device, 9. Packaging bag, 10. Folding cavity; 21. Hopper conveying structure; 22. Receiving mechanism; 23. Clamping structure; 24. Pressing structure; 25. Gantry support; 26. Horizontal plate. 211. Hopper, 212. Insertion partition, 213. Telescopic pressure bar, 214. Anti-backflow baffle, 215. Hopper roller, 216. Feeding lateral translation mechanism; 231 clamping longitudinal translation mechanism, 232 fixed clamping plate, 233 movable clamping plate, 234 pressure roller, 235 support roller; 31. Bag rack; 32. Bag inlet suction cup assembly; 41. Bag opening longitudinal translation mechanism; 42. Bag opening gripper; 43. Clamping gripper; 61 Transfer lateral translation mechanism, 62 Bag transfer suction cup assembly, 63 Support assembly, 64 Exhaust assembly, 65 Material receiving suction cup assembly, 66 Transfer suction cup assembly, 67 Push plate; 71 Long support plate, 72 Short support plate; 81 Sealing slide, 82 Sealing bracket, 83 Organizing gripper. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Example 1 See Figure 1-13 Example 1 provides an automatic packaging system for tie-on face masks. The system includes a frame 1, a feeding device 2, a packaging bag discharging device 3, a primary bag opening device 4, a secondary bag opening device 5, a bag transfer device 6, a vision inspection device 7, and a sealing device 8.

[0032] The feeding device 2 is located at the front of the frame 1 and includes a hopper conveying structure 21, a receiving mechanism 22, a clamping structure 23, and a pressing structure 24. The hopper conveying structure 21 includes a feeding lateral translation mechanism 216 arranged in the left and right direction, a hopper 211 on the feeding lateral translation mechanism 216 that can move in the left and right direction, two interlocking partitions 212 on the left and right sides of the bottom of the hopper 211, a telescopic pressure rod 213 on the lower left or right side of the hopper 211, and an anti-backflow baffle 214 that can move up and down. The left and right ends of the feeding lateral translation mechanism 216 are the receiving end and the clamping end, respectively. The receiving mechanism 22 and the clamping structure 23 are located directly in front of the receiving end and the clamping end, respectively. The telescopic pressure rod 213 presses the mask stacks in the hopper 211 tightly. The clamping structure 23 clamps the upper and lower sides of the mask stack and feeds it backward from the lower rear side of the hopper 211. The pressing structure 24 is located directly above the hopper 211 at the clamping end and can move up and down. The anti-backflow baffle 214 is located directly behind the hopper 211 at the clamping end. When the clamping structure 23 feeds, the telescopic pressure rod 213 and the interlocking partition 212 are both in the retracted state, and the pressing structure 24 presses against the upper side of the clamping structure 23. When the clamping structure 23 returns to its original position, the anti-backflow baffle 214 descends to prevent the mask stack from moving forward with the clamping structure 23.

[0033] Specifically, the hopper 211 is a rectangular trough that mates with the mask stack. It is arranged along the front-to-back direction, with open sides on the top, front, and bottom. A discharge port (specifically a rectangular opening along the left-to-right direction, allowing the movable clamping plate 233 and the fixed clamping plate 232, as well as the mask stack between them, to pass through) is located at the lower rear. Its bottom is fixed to the feeding transverse slide of the feeding transverse translation mechanism 216. Slots (arranged along the front-to-back direction) for the interlocking partitions 212 to pass through are provided on its left and right sides. A through hole for the telescopic pressure rod 213 to pass through is provided on its left or rear side. The two interlocking partitions 212 (driven by corresponding cylinders) can retract or extend synchronously. When the two interlocking partitions 212 are in the retracted state, the two interlocking partitions 212 (with their inner ends located on the corresponding side slots) are located on the left and right sides of the mask stack, respectively. When the two interlocking partitions 212 are in the extended state, they are moved inward to the hopper 211, with their inner ends abutting or adjacent to each other to form the bottom plate of the hopper 211. The interlocking partitions 212 are horizontally arranged in the left-right direction and can move in the left-right direction. There is a gap between them and the feed transverse slide (allowing the insertion of the fixing clamp 232). The telescopic pressure rod 213 is arranged in the left-right direction and can move in the left-right direction (driven by a corresponding cylinder). It includes two round rods arranged side by side in the front and back (arranged in the left-right direction). When the telescopic pressure rod 213 is in the retracted state, the telescopic pressure rod 213 (its inner end is located in the round hole) is located on the left or right side of the mask stack. When the telescopic pressure rod 213 is in the extended state, it is moved inward to the hopper 211 and located on the upper side of the mask stack.

[0034] The receiving mechanism 22 includes a receiving plate capable of forward and backward movement and vertical movement (driven by two cylinders respectively). The receiving plate is positioned forward and backward and is located directly in front of the material hopper 211 at the receiving end. During receiving, the receiving plate is in a high position and moves backward to directly above the material hopper 211. At this time, the telescopic pressure rod 213 is in a retracted state, and the two interlocking partitions 212 are in an extended state. The top of the mask stack is pressed between the receiving plate and the folding chamber 10 (specifically a rectangular chamber, where the mask stack is located, and the folding chamber 10 can descend into the material hopper 211) and moves downward with the receiving plate into the material hopper 211. After receiving, the receiving plate returns to its original position (moves forward, then rises, then moves backward), and the telescopic pressure rod 213 returns to an extended state. When the material hopper 211 moves left and right, the telescopic pressure rod 213 and the two interlocking partitions 212 are both in an extended state.

[0035] The clamping structure 23 includes a clamping longitudinal translation mechanism 231 arranged in the front-to-back direction, and a fixed clamping plate 232 and a movable clamping plate 233 on the rear side of the clamping longitudinal slide. The movable clamping plate 233 and the fixed clamping plate 232 are arranged side by side vertically, both in the front-to-back direction, with their front ends aligned. They are both located directly in front of the hopper 211 at the clamping end, and both can be inserted into and pass through the hopper 211. The movable clamping plate 233 can move up and down (driven by a corresponding cylinder). When the clamping structure 23 is feeding material, the clamping longitudinal slide moves backward, and the rear ends of the fixed clamping plate 232 and the movable clamping plate 233 move backward into the hopper 211. The rear end of the fixed clamping plate 232 is located adjacent to and below the interlocking partition 212, and the rear end of the movable clamping plate 233 is located adjacent to and above the telescopic pressure rod 213. Then, the movable clamping plate 233 moves downward, and simultaneously, the telescopic pressure rod 213 and the two interlocking partitions 212 retract, and the pressing structure 24 moves downward and presses against the upper side of the movable clamping plate 233. The movable clamping plate 233 moves downward to its lowest position, and the mask stack is clamped between the movable clamping plate 233 and the fixed clamping plate 232. The clamping longitudinal slide continues to move backward, and the movable clamping plate 233 and the fixed clamping plate 232 extend backward out of the discharge port and insert into the packaging bag 9; then, the anti-backflow baffle 214 descends, and the clamping longitudinal slide moves forward again, allowing the rear end of the movable clamping plate 233 to reach the front end of the mask stack, and the movable clamping plate 233 moves upward, while simultaneously, the pressing structure 24 returns to its upward position. Then, the movable clamping plate 233 moves downward to clamp the front end of the mask stack, while simultaneously, the pressing structure 24 moves downward, and the anti-backflow baffle 214 returns to its upward position. Then, the clamping longitudinal slide moves backward to convey the mask stack backward (to the rear end of the mask stack and the rear end of the packaging bag). Finally, the clamping longitudinal slide returns forward, and the pressing structure 24 returns upward.

[0036] A portal frame 25 (including a top beam and two vertical beams) is located directly behind the material hopper 211 at the clamping end. The portal frame 25 is arranged horizontally, with a horizontal plate 26 between its two vertical beams, mounted on the frame. The horizontal plate 26 is also horizontally arranged, located adjacent to the lower rear of the material hopper 211 at the clamping end. Rectangular holes are provided along its upper horizontal direction for the movable clamping plate 233 and the fixed clamping plate 232, along with the mask stack between them, to pass through. A pressing structure 24 is located in front of the top beam of the portal frame 25, with two pressing rollers 234 arranged side-by-side at its bottom. The pressing rollers 234 are arranged horizontally. The two pressing rollers 234 are located directly above the left and right sides of the movable clamping plate 233, respectively. When the pressing structure 24 is in its low position, the pressing rollers 234 press against the upper side of the movable clamping plate 233. A strip-shaped notch is provided at the rear of the movable clamping plate 233 and directly below it between the two pressing rollers 234. The strip-shaped notch is arranged in the front-to-back direction and opens to the rear. The anti-backflow baffle 214 is vertically arranged and can move up and down (specifically driven by a corresponding cylinder). It is located above the discharge port, directly above the secondary bag opening device 5, directly above the strip-shaped notch, and directly above the center of the rectangular hole. It is located behind the horizontal plate 26, and its width is smaller than the width of the strip-shaped notch. When the anti-backflow baffle 214 is in the low position (adjacent to the front of the mask stack), it is inserted into the strip-shaped notch to prevent the mask stack from moving forward with the clamping structure 23.

[0037] Preferably, a plurality of support rollers 235 (specifically four, arranged in a rectangular pattern) are provided on the frame 1 and below the fixed clamping plate 232. The support rollers 235 are located in front of the hopper 211 at the feeding end, and the fixed clamping plate 232 is slidably mounted on the support rollers 235. A plurality of hopper rollers 215 (specifically six, for the fixed clamping plate 232 to slide) are provided on the feed transverse slide block and inside the hopper 211. Both the hopper rollers 215 and the support rollers 235 are arranged in the left-right direction.

[0038] The secondary bag-opening device 5 is located directly behind the hopper 211 at the clamping end. It can be inserted into the left and right ends of the front end of the packaging bag 9 and opened and pulled in opposite directions to perform secondary bag opening. It is located on the rear side of the horizontal plate 26. The secondary bag-opening device 5 includes two bag-opening components (including L-shaped bag-opening handles and drive cylinders (arranged along the left and right directions), etc., with the bag-opening handles arranged along the left and right directions. The ends of the two bag-opening handles that are close to each other (with the tip being smaller at the back and larger at the front) are bent backward along the front-back direction. The two bag-opening components are located at the left and right ends of the front end of the packaging bag 9, respectively, and are located at the left and right ends of the rectangular hole. Their separation movement realizes secondary bag opening. The bag-opening handles have a certain width (vertical width) to ensure the size of the opening.

[0039] The primary bag-opening device 4 is arranged in a front-to-back direction and is located directly behind the secondary bag-opening device 5. It can move in the front and back direction and is used to convey the packaging bag 9 forward and pull the front part of the packaging bag 9 vertically to open it in the first stage. When the packaging bag 9 is at the front end of the primary bag-opening device 4, the front end of the packaging bag 9 is inserted into the secondary bag-opening device 5, and the rear part of the clamping structure 23 passes through the secondary bag-opening device 5 and is inserted into the packaging bag 9 for bagging. After bagging, the packaging bag 9 moves backward a predetermined distance to the handover station and separates from the secondary bag-opening device 5. Specifically, the primary bag-opening device 4 includes a longitudinal translation mechanism 41 arranged in the front-to-back direction and a gripper assembly on the longitudinal slide of the bag opening device. When the gripper assembly is at the rear end, the bag inlet suction cup assembly 32 of the packaging bag discharge device 3 is arranged opposite to the gripper assembly and they cooperate with each other to realize the transfer of the packaging bag 9. The gripper assembly includes a bag opening gripper 42 and a clamping gripper 43 arranged side by side. Both the opening gripper 42 and the clamping gripper 43 can clamp the upper and lower sides of the packaging bag 9. They each include two gripping arms that can move in opposite directions in the vertical direction, which can clamp the front and rear of the packaging bag 9 respectively. Suction cups are provided on the opposite sides of the two gripping arms of the opening gripper 42 (the lower side of the upper gripping arm and the upper side of the lower gripping arm).

[0040] The packaging bag dispensing device 3 is located at the rear of the frame 1, next to the rear end of the primary bag opening device 4, and is used to output the packaging bag 9 to the primary bag opening device 4. Specifically, the packaging bag dispensing device 3 is located on the left or right side of the rear end of the primary bag opening device 4 and includes a bag storage rack 31 that can rise in a step-like manner (driven by a corresponding structure) and a bag infeed suction cup assembly 32 directly above the bag storage rack 31 that can move left and right and vertically (specifically driven by two cylinders). Multiple packaging bags 9 are stacked on the bag storage rack 31, and the packaging bags 9 are arranged in a front-to-back direction (the front end is open). The bag infeed suction cup assembly 32 can only pick up one packaging bag 9 at a time, and has suction cups (specifically four) on its lower side, which are used to transfer the packaging bag 9 from the bag storage rack 31 to the rear end of the primary bag opening device 4. After a predetermined number (e.g., one or three) of packaging bags 9 are transferred by the bag suction cup assembly 32, the storage bag rack 31 rises so that the height of the packaging bags 9 on top of it is at a predetermined height (i.e., it remains constant).

[0041] When the packaging bag 9 is fed in, the suction cup assembly 32 moves toward the gripper assembly. At this time, the gripper assembly is located at the rear end and its two gripping arms are open. The front and rear parts of the packaging bag 9 are respectively located at the opening gripper 42 and the clamping gripper 43. The clamping gripper 43 clamps the packaging bag 9, the suction cup assembly 32 releases the packaging bag 9 and returns to its original position, and then the opening longitudinal slide moves forward. The opening gripper 42 clamps and then opens, and the suction cup on it works to open the bag once. When the opening longitudinal slide reaches the front end, the front end of the packaging bag 9 is open and placed on the secondary opening device 5. The secondary opening device 5 performs a secondary opening, and then the clamping gripper 43 is released. The feeding structure 23 performs bag filling; after bag filling is completed, the opening longitudinal slide moves backward to the handover station. At this time, the clamping gripper 43 clamps the packaging bag 9. Upon reaching the handover station, the clamping jaw 4 releases, the suction cup of the bag-opening jaw 42 ceases operation, and the bag transfer device 6 transfers the packaging bag 9. After the handover is completed, the bag-opening longitudinal slide moves backward to return to its original position.

[0042] The bag transfer device 6 is arranged in a left-right direction and is used to transfer the packaging bag 9 to the primary bag opening device 4. It has a transfer station, an inspection station, and a sealing station sequentially along the conveying direction of the packaging bag 9. It also transfers the packaging bag 9 from the transfer station to the inspection station and the sealing station, and then discharges it. Furthermore, it vents the packaging bag 9. Specifically, the bag transfer device 6 includes a left-right lateral translation mechanism 61, a bag transfer suction cup assembly 62 (driven vertically by a corresponding cylinder) on the lateral slide of the transfer lateral translation mechanism 61, a support assembly 63 above the bag transfer suction cup assembly 62, and a venting assembly 64 (driven vertically by a corresponding cylinder) directly above the support assembly 63. The bag transfer suction cup assembly 62, the support assembly 63, and the venting assembly 64 are all arranged in a left-right direction. Specifically, the bag transfer suction cup assembly 62 is a rectangular plate arranged horizontally in the left-right direction, with rectangular notches at both ends. The bag-transfer suction cup assembly 62, located near one end (left or right, specifically the right end) of the primary bag-opening device 4, cooperates with the gripper assembly to transfer the packaging bag 9. A receiving suction cup assembly 65 is located on the upper side of the end (left or right, specifically the right end) near the primary bag-opening device 4, a transfer suction cup assembly 66 is located on the upper side of its middle section (specifically the left side), and a push plate 67 is located on the upper side of its other end (specifically the right or left, specifically the left end). The support assembly 63 and the venting assembly 64 are located at the detection station and the sealing station, respectively. During handover, the receiving suction cup assembly 65 is located at the handover station and below the packaging bag 9 on the gripper assembly; the transfer suction cup assembly 66 is located at the detection station; and the push plate 67 is located at the sealing station on the side (left or right, specifically the right side) near the primary bag-opening device 4. After the bag-transfer suction cup assembly 62 moves horizontally, the receiving suction cup assembly 65 is located at the inspection station, the transfer suction cup assembly 66 is located at the sealing station, and the push plate 67 (at this time, the bag-transfer suction cup assembly 62 is in a high position) pushes the packaging bag 9 at the sealing station away from the support assembly 63 (specifically, it is pushed out from the left end of the support assembly 63). The packaging bag 9 is relay-type transported through the left-right and vertical movements of the bag-transfer suction cup assembly 62.

[0043] When the bag-transfer suction cup assembly 62 is in a high position, its suction cup group is located below the packaging bag 9 and is operational. At the handover station, the bag-transfer suction cup assembly 62 is in a high position, and the upper side of the receiving suction cup group 65 contacts the packaging bag 9 to achieve handover. The packaging bags 9 at the inspection station and sealing station are both located between the support assembly 63 and the venting assembly 64. When the bag-transfer suction cup assembly 62 is in a low position, the packaging bags 9 at the inspection station and sealing station are placed on the support assembly 63. When the bag-transfer suction cup assembly 62 is in a high position, the upper sides of the receiving suction cup group 65 and the transfer suction cup group 66 are higher than the support assembly 63, and the packaging bags 9 at the inspection station and sealing station are located above the support assembly 63. The venting assembly 64 is located directly above the packaging bag 9, and it includes two pressure plates (horizontally arranged in the left-right direction) arranged side by side and driven synchronously. When the venting assembly 64 is in a low position, it presses against the upper side of the packaging bag 9 to vent. The upper end of the push plate 67 is always located above the support component 63.

[0044] Preferably, the support assembly 63 includes a short support plate 72 and two long support plates 71, both horizontally arranged in the left-right direction. The short support plate 72 is located at the sealing station, directly behind the sealing device 8, below the front end of the packaging bag 9 at the sealing station. It is located directly in front of the long support plate 71 near the end of the sealing device 8 (left or right end, specifically the left end), and is shorter than the long support plate 71. It is used to position the front end of the packaging bag 9 to facilitate processing by the gripper 83. The two long support plates 71 are arranged side-by-side, located at the rear and lower side of the packaging bag 9, respectively, directly below the exhaust assembly 64, extending from the inspection station to the sealing station. At the inspection station, when the bag-transfer suction cup assembly 62 is in a low position, the packaging bag 9 is placed on the two long support plates 71. At the sealing station, when the bag transfer suction cup assembly 62 is in a low position, the front part of the packaging bag 9 rests on the short support plate 72, while the middle and rear parts rest on the two long support plates 71 respectively. The suction cups on the receiving suction cup assembly 65 and the transfer suction cup assembly 66 are arranged alternately with the three support plates (short support plate 72 and two long support plates 71) to allow the bag transfer suction cup assembly 62 to move left and right.

[0045] The visual inspection device 7 is located at the inspection station of the bag transfer device 6, and is used to visually inspect the front end of the packaging bag 9. Specifically, the visual inspection device 7 includes a camera and a light source. The camera is located directly above the front end of the packaging bag 9 at the inspection station, above the exhaust assembly 64, and is vertically downward. The light source is located directly below the camera, in front of the long support plate 71, and below the support assembly 63.

[0046] The sealing device 8 and the primary bag opening device 4 are arranged side-by-side at their front ends. The sealing device 8 is located at the sealing station of the bag transfer device 6 and can move back and forth. Specifically, the sealing device 8 is located directly in front of the packaging bag 9 at the sealing station and can move back and forth. The sealing device 8 includes a sealing slide 81 that can move back and forth (pneumatically driven by a corresponding cylinder), a sealing bracket 82 on the sealing slide 81, an upper sealing head that can move up and down (pneumatically driven by a corresponding cylinder) on the rear side of the sealing bracket 82, a lower sealing head that can move up and down (pneumatically driven by a corresponding cylinder) on the rear side of the sealing bracket 82, and two sorting grippers 83 on the rear side of the sealing bracket 82 (slidably mounted on the front side of the sealing bracket 82 via the bracket). The upper and lower sealing heads are both arranged in the left and right direction and cooperate with the front end of the packaging bag 9. They are located above and below the packaging bag 9, respectively, which is consistent with the conventional structure. Two arranging grippers 83 are positioned opposite each other and can move apart in the left and right directions (driven by two separate cylinders, which are driven synchronously). They are located directly in front of the left and right ends of the packaging bag 9 at the sealing station, and are driven synchronously. The arranging grippers 83 can clamp the upper and lower sides of the packaging bag 9 and are located adjacent to the rear of the upper and lower sealing heads. When the sealing slide 81 moves backward to the rear end, the upper and lower sealing heads are located directly above and below the front end of the packaging bag 9 at the sealing station, respectively, and can move toward the packaging bag 9 and press against the corresponding sides of the packaging bag 9. A short support plate 72 is located adjacent to the rear of the two arranging grippers 83. Before sealing, the two arranging grippers 83 clamp the left and right ends of the packaging bag 9 respectively and move apart to arrange the front end of the packaging bag 9.

[0047] Example 2 See Figure 7-10 Example 2 provides an automatic packaging system for tie-on masks, whose structure is basically the same as that of Example 1, except that: the bag inlet suction cup assembly 32 in this example is a U-shaped structure arranged in the left-right direction and facing the opening of the primary bag opening device 4, with two suction cups arranged side by side on each of its two arms (arranged front and back). The bag opening gripper 42 and the clamping gripper 43 are U-shaped structures arranged in the left-right direction and facing the opening of the packaging bag discharge device 3 (including two arms arranged side by side), with multiple suction cups arranged side by side on each of the two arms of the bag opening gripper 42. When the bag inlet suction cup assembly 32 moves toward the primary bag opening device 4 (to the left or right, specifically to the left), its two arms are respectively located at the openings of the upper arms of the bag opening gripper 42 and the clamping gripper 43. The front long support plate 71 is mounted on the frame 1 near the sealing device 8 at one end (specifically the left end or the right end, specifically the left end, with the right side suspended) via a column. The column is vertically positioned and located below the corresponding long support plate 71. The rear long support plate 71 is fixed to the frame 1 via a bracket.

[0048] The bag transfer suction cup assembly 62 has two short arms arranged side by side at one end (left or right, specifically the right end) near the primary bag opening device 4, and two long arms arranged side by side at the other end (right or left, specifically the left end). Both the short and long arms are arranged in the left-right direction. The upper sides of the receiving suction cup assembly 65 and the transfer suction cup assembly 66 are flush and each includes two suction cups arranged side by side. The two suction cups of the receiving suction cup assembly 65 are respectively located at the ends of the two short arms (specifically the right end). There are two push plates 67, which are respectively located at the ends of the two long arms (specifically the left end). The upper end of the push plate 67 (which may be slightly lower than the upper side of the receiving suction cup assembly 65 or flush with the upper side of the receiving suction cup assembly 65) is perpendicular to the long arms. When the bag transfer suction cup assembly 62 is in a high position, the upper end of the push plate 67 is located above the support assembly 63. The distance between the handover station and the inspection station is equal to the distance between the inspection station and the sealing station. The distance between the receiving suction cup group 65 and the transfer suction cup group 66 is equal to the distance between the handover station and the inspection station, and is greater than the distance between the transfer suction cup group 66 and the push plate 67. When the receiving suction cup group 65 is located at the handover station, the two short arms are respectively located in the openings of the lower clamping arms of the bag opening gripper 42 and the clamping gripper 43. When the receiving suction cup group 65 is located at the inspection station, the column is located between the two long arms.

[0049] Example 3 See Figure 1-13 Example 3 provides an automatic packaging system for tie-on masks, whose structure is basically the same as that of Example 1, except that: in this example, the primary bag opening device 4 is located on the right side of the frame 1, the sealing device 8 is located on the left side of the frame 1, the bag opening gripper 42 and the clamping gripper 43 are located on the left side of the bag opening longitudinal translation mechanism 41, the packaging bag discharge device 3 is located on the left side of the primary bag opening device 4, and the fixed clamping plate 232 and the movable clamping plate 233 are both located on the right side of the clamping longitudinal translation mechanism 231. The right end of the feeding device 2 is the receiving end, and its left end is the clamping end. The handover station, the inspection station and the sealing station are arranged sequentially from right to left. The receiving suction cup group 65 is located on the right end of the bag transfer suction cup assembly 62, and the push plate 67 is located on the left end of the bag transfer suction cup assembly 62.

[0050] Example 4 Example 4 provides an automatic packaging system for tie-on masks, the structure of which is basically the same as that of Example 1, except that: in this example, the packaging bag 9 is a paper bag, and the mask stack consists of 10 masks stacked on top of each other.

[0051] Example 5 See Figure 1-13 Example 5 provides an automated packaging method for tie-on face masks, using the automated packaging system for tie-on face masks disclosed in Examples 1-4. The method includes: Packaging bag feeding: The bag feeding suction cup assembly 32 moves toward the gripper assembly (specifically, to the right). At this time, the gripper assembly is located at the rear end and its two gripping arms are in the open state. The front and rear parts of the packaging bag 9 are respectively located at the bag opening gripper 42 and the clamping gripper 43. The clamping gripper 43 clamps the packaging bag 9, the bag feeding suction cup assembly 32 releases the packaging bag 9 and returns to its original position. Then, the bag opening longitudinal slide moves forward, the bag opening gripper 42 clamps and then opens, and the suction cup on it works to perform one bag opening.

[0052] When the longitudinal slide of the bag opening device moves to the front end, the front end of the packaging bag 9 is open and placed on the secondary bag opening device 5. The secondary bag opening device 5 performs a secondary bag opening, and then the clamping jaws 43 are released.

[0053] Mask feeding and bagging: During material receiving, the receiving plate is in a high position and moves backward to directly above the material hopper 211. At this time, the telescopic pressure rod 213 is in a retracted state, and the two interlocking partitions 212 are in an extended state. The top of the mask stack is pressed between the receiving plate and the folding chamber 10 and moves downward with the receiving plate into the material hopper 211. After receiving the material, the receiving plate returns to its original position, and the telescopic pressure rod 213 returns to an extended state.

[0054] The hopper 211 moves from the receiving end to the clamping end (specifically, to the left), and the telescopic pressure rod 213 and the two interlocking partitions 212 are both in the extended state.

[0055] During feeding, the longitudinal sliding block moves backward, and the rear ends of the fixed clamping plate 232 and the movable clamping plate 233 move backward into the hopper 211. The rear end of the fixed clamping plate 232 is located below the adjacent interlocking partition 212, and the rear end of the movable clamping plate 233 is located above the adjacent telescopic pressure rod 213. Then, the movable clamping plate 233 moves downward. At the same time, the telescopic pressure rod 213 and the two interlocking partitions 212 are retracted, and the pressing structure 24 moves downward and presses against the upper side of the movable clamping plate 233. The movable clamping plate 233 moves downward to its lowest position, and the mask stack is clamped between the movable clamping plate 233 and the fixed clamping plate 232.

[0056] During bagging, the clamping longitudinal slide continues to move backward, and the movable clamp 233 and fixed clamp 232 extend backward through the discharge port and insert into the packaging bag 9. Then, the anti-backflow baffle 214 descends, and the clamping longitudinal slide moves forward again, bringing the rear end of the movable clamp 233 to the front end of the mask stack, while the movable clamp 233 moves upward. At the same time, the pressing structure 24 returns to its upward position. Then, the movable clamp 233 moves downward to clamp the front end of the mask stack, while the pressing structure 24 moves downward, and the anti-backflow baffle 214 returns to its upward position. Then, the clamping longitudinal slide moves backward again to convey the mask stack backward. Finally, the clamping longitudinal slide returns forward, and the pressing structure 24 returns to its upward position.

[0057] After the bagging is completed, the longitudinal slide of the bag opening device moves backward to the handover station, and the secondary bag opening device 5 returns to its original position (specifically, it moves in opposite directions).

[0058] Transfer and Inspection: During handover, the receiving suction cup assembly 65 is located at the handover station and below the packaging bag 9 on the gripper assembly. At this time, the receiving suction cup assembly 65 is in a high position. The clamping gripper 43 is released, and the suction cups of the bag opening gripper 42 are not working. After the handover is completed, the bag opening longitudinal slide moves backward to return to its original position.

[0059] After the bag-transfer suction cup assembly 62 moves horizontally (specifically to the left), it moves downwards to a lower position. The push plate 67 pushes the packaging bag 9 at the sealing station away from the support assembly 63. The transfer suction cup assembly 66 is located at the sealing station and transfers the packaging bag 9 from the inspection station to the sealing station. The receiving suction cup assembly 65 is located at the inspection station and transfers the packaging bag 9 from the handover station to the inspection station. At the inspection station, the packaging bag 9 is placed on the support assembly 63; the exhaust assembly 64 descends to exhaust air from the packaging bag 9. The vision inspection device 7 performs visual inspection on the front end of the packaging bag 9; simultaneously, the bag-transfer suction cup assembly 62 returns to its original position.

[0060] Sealing: At the sealing station, the front of the packaging bag 9 is placed on the short support plate 72, while the middle and rear parts are placed on two long support plates 71 respectively. The venting assembly 64 descends to vent and clamp the packaging bag 9. The sealing slide 81 moves backward, and the two arranging jaws 83 clamp the left and right ends of the packaging bag 9 respectively and move apart to arrange the front end of the packaging bag 9. After arranging, the upper and lower sealing ends move toward the packaging bag 9 to seal it. After sealing, the two arranging jaws 83 release, the upper and lower sealing ends return to their original positions, and the sealing slide 81 returns to its forward position.

[0061] Discharge: After sealing is completed, the left and right movement of the bag suction cup assembly 62 causes the push plate 67 to push the packaging bag 9 at the sealing station away from the support assembly 63.

[0062] When the bag-transfer suction cup assembly 62 moves towards the sealing device 8 (specifically, to the left), it is in a high position and descends after reaching its destination. When it moves towards the primary bag-opening device 4 (specifically, to the right), it is in a low position and rises after reaching its destination, forming a cycle. When the exhaust assembly 64 moves downward to its low position, the bag-transfer suction cup assembly 62 is also in a low position; that is, during exhaust, the bag-transfer suction cup assembly 62 is in a low position. For each round trip movement of the bag-transfer suction cup assembly 62, the exhaust assembly 64 moves up and down once. This means that exhaust at the detection station and the sealing station (where two exhausts are performed before sealing) occurs simultaneously.

[0063] If the visual inspection device 7 fails the inspection, the sealing device 8 will not work at the sealing station and will issue an alarm.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automated packaging system for tie-on face masks, characterized in that, It includes a frame (1), a feeding device (2), a packaging bag discharging device (3), a primary bag opening device (4), a secondary bag opening device (5), a bag transfer device (6), a vision inspection device (7), and a sealing device (8); The feeding device (2) is located at the front of the frame (1) and includes a hopper conveying structure (21), a receiving mechanism (22), a clamping structure (23), and a pressing structure (24). The hopper conveying structure (21) includes a feeding lateral translation mechanism (216) arranged in the left and right directions, a hopper (211) on the feeding lateral translation mechanism (216) that can move in the left and right directions, two interlocking partitions (212) on the left and right sides of the bottom of the hopper (211), a telescopic pressure rod (213) on the left or right side of the hopper (211), and an anti-backflow baffle (214) that can move up and down. The left and right ends of the transverse translation mechanism (216) are the receiving end and the clamping end, respectively. The receiving mechanism (22) and the clamping structure (23) are located directly in front of the receiving end and the clamping end, respectively. The telescopic pressure rod (213) presses the mask stack in the hopper (211) tightly. The clamping structure (23) can clamp the upper and lower sides of the mask stack and send it out from the lower rear side of the hopper (211). The pressing structure (24) is located directly above the hopper (211) at the clamping end and can move up and down. The anti-backflow baffle (214) is located directly behind the hopper (211) at the clamping end. When the clamping structure (23) feeds materials, the telescopic pressure rod (213) and the interlocking partition (212) are both in a retracted state, and the pressing structure (24) presses against the upper side of the clamping structure (23); when the clamping structure (23) returns to its original position, the anti-return baffle (214) descends to prevent the mask stack from moving forward with the clamping structure (23); The secondary bag opening device (5) is located directly behind the hopper (211) at the clamping end. It can be inserted into the left and right ends of the front end of the packaging bag (9) and opened and pulled in opposite directions to perform secondary bag opening. The primary bag opening device (4) is arranged in the front-back direction and is located directly behind the secondary bag opening device (5). It can move in the front-back direction and is used to convey the packaging bag (9) forward and to perform primary bag opening by pulling the front part of the packaging bag (9) in the vertical direction. The packaging bag discharge device (3) is located at the rear of the frame (1) and is located next to the rear end of the primary bag opening device (4). It is used to output the packaging bag (9) to a... The bag opening device (4) is arranged side by side with the front end of the bag opening device (4). The sealing device (8) is located at the sealing station of the bag transfer device (6). The visual inspection device (7) is located at the inspection station of the bag transfer device (6) and is used to visually inspect the front end of the packaging bag (9). The bag transfer device (6) is arranged in the left and right direction. It is provided with a handover station, an inspection station and a sealing station in sequence along the conveying direction of the packaging bag (9). It is used to send the packaging bag (9) from the handover station to the inspection station and the sealing station in sequence and send it out. It is also used to vent the packaging bag (9). When the packaging bag (9) is located at the front end of the primary bag opening device (4), the front end of the packaging bag (9) is inserted into the secondary bag opening device (5), and the rear part of the clamping structure (23) passes through the secondary bag opening device (5) and is inserted into the packaging bag (9) for bagging; after bagging is completed, the packaging bag (9) moves backward a predetermined distance to the handover station and separates from the secondary bag opening device (5).

2. The automatic packaging system for tie-on face masks according to claim 1, characterized in that, The hopper (211) is a rectangular trough that cooperates with the mask stack. It is arranged in the front and back direction, with open upper, front and lower sides, and a discharge port at the lower rear side. Its bottom is fixed on the feeding transverse slide of the feeding transverse translation mechanism (216). The two interlocking partitions (212) can retract or extend synchronously; when the two interlocking partitions (212) are in the retracted state, the two interlocking partitions (212) are located on the left and right sides of the mask stack respectively; when the two interlocking partitions (212) are in the extended state, the two interlocking partitions (212) are transported inward to the hopper (211) and their inner ends abut together or are adjacent to each other to form the bottom plate of the hopper (211); the interlocking partitions (212) are horizontally arranged in the left and right direction, and can move in the left and right direction, and there is a gap between them and the feed transverse slide; The telescopic pressure rod (213) is arranged in the left and right direction and can move in the left and right direction; when the telescopic pressure rod (213) is in the retracted state, the telescopic pressure rod (213) is located on the left or right side of the mask stack; when the telescopic pressure rod (213) is in the extended state, the telescopic pressure rod (213) is moved inward to the hopper (211) and located on the upper side of the mask stack; The receiving mechanism (22) includes a receiving plate that can move forward and backward and vertically. The receiving plate is arranged in the forward and backward direction and is located in front of the material bin (211) at the receiving end. When receiving materials, the receiving plate is in a high position and moves backward to directly above the material bin (211). At this time, the telescopic pressure rod (213) is in a retracted state, the two interlocking partitions (212) are in an extended state, and the top of the mask stack is pressed between the receiving plate and the folding chamber (10) and moves downward with the receiving plate into the material bin (211). After receiving materials, the receiving plate returns to its original position, and the telescopic pressure rod (213) becomes extended. When the hopper (211) moves left and right, the telescopic pressure rod (213) and the two interlocking partitions (212) are all in an extended state; The clamping structure (23) includes a clamping longitudinal translation mechanism (231) arranged in the front-back direction and a fixed clamping plate (232) and a movable clamping plate (233) on the rear side of the clamping longitudinal slide. The movable clamping plate (233) and the fixed clamping plate (232) are arranged side by side, both in the front-back direction, and both are located in front of the material bin (211) at the clamping end. They can be inserted into and pass through the material bin (211) backward. The movable clamping plate (233) can move up and down. The discharge port allows the movable clamping plate (233) and the fixed clamping plate (232) and the mask stack between them to pass backward. When the clamping structure (23) feeds material, the clamping longitudinal slide moves backward, and the rear ends of the fixed clamping plate (232) and the movable clamping plate (233) move backward into the hopper (211). The rear end of the fixed clamping plate (232) is located below the adjacent interlocking partition (212), and the rear end of the movable clamping plate (233) is located above the adjacent telescopic pressure rod (213). Then, the movable clamping plate (233) moves downward. At the same time, the telescopic pressure rod (213) and the two interlocking partitions (212) are both retracted. The pressing structure (24) moves downward and presses against the upper side of the movable clamping plate (233). The movable clamping plate (233) moves downward to a low position, and the mask stack is clamped between the movable clamping plate (233) and the fixed clamping plate (232). Between; the clamping longitudinal slide continues to move backward, the movable clamp (233) and the fixed clamp (232) pass backward through the discharge port and are inserted into the packaging bag (9), then the anti-backflow baffle (214) descends, the clamping longitudinal slide moves forward again so that the rear end of the movable clamp (233) reaches the front end of the mask stack and the movable clamp (233) moves upward, at the same time, the pressing structure (24) returns to its upward position; then the movable clamp (233) moves downward to clamp the front end of the mask stack, at the same time, the pressing structure (24) moves downward and the anti-backflow baffle (214) returns to its upward position; then the clamping longitudinal slide moves backward again to convey the mask stack backward, finally, the clamping longitudinal slide returns forward and the pressing structure (24) returns to its upward position.

3. The automatic packaging system for tie-on face masks according to claim 2, characterized in that, A portal frame (25) is provided directly behind the hopper (211) at the clamping end, and the portal frame (25) is arranged in the left and right direction; the pressing structure (24) is located on the front side of the top beam of the portal frame (25), and two pressing rollers (234) are arranged side by side at its bottom; multiple support rollers (235) are provided on the frame (1) and below the fixed clamping plate (232), and the support rollers (235) are located in front of the hopper (211) at the clamping end; the fixed clamping plate (232) is slidably mounted on the support rollers (235); multiple hopper rollers (215) are provided on the feed transverse slide and inside the hopper (211); the hopper rollers (215), the pressing rollers (234), and the support rollers (235) All are arranged in the left and right directions; the two pressing rollers (234) are located directly above the left and right sides of the movable clamping plate (233), respectively; when the pressing structure (24) is in the low position, the pressing rollers (234) press against the upper side of the movable clamping plate (233); the rear part of the movable clamping plate (233) and directly below the two pressing rollers (234) is provided with a strip-shaped notch, which is arranged in the front and back direction and is open to the rear; the anti-backflow baffle (214) is arranged vertically, located above the discharge port, directly above the secondary bag opening device (5), and directly above the strip-shaped notch; when the anti-backflow baffle (214) is in the low position, it is inserted into the strip-shaped notch to prevent the mask stack from moving forward with the clamping structure (23).

4. The automatic packaging system for tie-on face masks according to claim 3, characterized in that, The packaging bag discharging device (3) is located on the left or right side of the rear end of the primary bag opening device (4) and includes a bag storage rack (31) that can rise in a step-by-step manner and a bag inlet suction cup assembly (32) that can move left and right and vertically directly above the bag storage rack (31); multiple packaging bags (9) are stacked on the bag storage rack (31) and the packaging bags (9) are arranged in the front-back direction; the bag inlet suction cup assembly (32) can only adsorb one packaging bag (9), and a suction cup is provided on its lower side, which is used to transfer the packaging bag (9) from the bag storage rack (31) to the rear end of the primary bag opening device (4); after a predetermined number of packaging bags (9) are transferred by the bag inlet suction cup assembly (32), the bag storage rack (31) rises so that the height of the packaging bag (9) at its top reaches a predetermined height; The bag opening device (4) includes a bag opening longitudinal translation mechanism (41) arranged in the front-to-back direction and a gripper assembly on the bag opening longitudinal slide; when the gripper assembly is located at the rear end, the bag inlet suction cup assembly (32) is arranged opposite to the gripper assembly and they cooperate with each other to realize the transfer of the packaging bag (9). The gripper assembly includes a bag opening gripper (42) and a clamping gripper (43) arranged side by side in the front and back; the bag opening gripper (42) and the clamping gripper (43) can clamp the upper and lower sides of the packaging bag (9), and can clamp the front and rear parts of the packaging bag (9) respectively; suction cups are provided on the opposite sides of the two gripping arms of the bag opening gripper (42); When feeding the packaging bag (9), the bag feeding suction cup assembly (32) moves toward the gripper assembly. At this time, the gripper assembly is located at the rear end and its two gripping arms are in an open state. The front and rear parts of the packaging bag (9) are respectively located at the bag opening gripper (42) and the clamping gripper (43). The clamping gripper (43) clamps the packaging bag (9). The bag feeding suction cup assembly (32) releases the packaging bag (9) and returns to its original position. Then, the bag opening longitudinal slide moves forward. The bag opening gripper (42) clamps first and then opens, and the suction cup on it works to open the bag once. When the longitudinal slide of the bag opening reaches the front end, the front end of the packaging bag (9) is open and fitted onto the secondary bag opening device (5), and then the clamping claw (43) is released; the clamping and conveying structure (23) performs bag filling; after bag filling is completed, the longitudinal slide of the bag opening moves backward to the handover station, at which time the clamping claw (43) clamps the packaging bag (9); at the handover station, the clamping claw (43) is released, the suction cup of the bag opening claw (42) does not work, and the packaging bag (9) is handed over to the bag transfer device (6); after the handover is completed, the longitudinal slide of the bag opening moves backward to return to its original position.

5. The automatic packaging system for tie-on face masks according to claim 4, characterized in that, The bag transfer device (6) includes a transfer lateral translation mechanism (61) arranged in the left-right direction, a bag transfer suction cup assembly (62) on the transfer lateral slide of the transfer lateral translation mechanism (61) that can move up and down, a support assembly (63) above the bag transfer suction cup assembly (62), and an exhaust assembly (64) directly above the support assembly (63) that can move up and down; the bag transfer suction cup assembly (62), the support assembly (63), and the exhaust assembly (64) are all arranged in the left-right direction; the end of the bag transfer suction cup assembly (62) near the primary bag opening device (4) cooperates with the gripper assembly to realize the transfer of the packaging bag (9), and the upper side of the end near the primary bag opening device (4) is provided with a receiving suction cup group (65), the upper side of the middle part is provided with a transfer suction cup group (66), and the upper side of the other end is provided with a receiving suction cup group (65). A push plate (67) is provided; the two ends of the support assembly (63) and the exhaust assembly (64) are respectively located at the detection station and the sealing station; during the handover, the receiving suction cup group (65) is located at the handover station and is located on the lower side of the packaging bag (9) on the gripper assembly, the transfer suction cup group (66) is located at the detection station, and the push plate (67) is located on the side of the sealing station close to the primary bag opening device (4); after the bag transfer suction cup assembly (62) is moved horizontally, the receiving suction cup group (65) is located at the detection station, the transfer suction cup group (66) is located at the sealing station, and the push plate (67) pushes the packaging bag (9) at the sealing station away from the support assembly (63); the packaging bag (9) is relay-type transported by the left and right movement and vertical movement of the bag transfer suction cup assembly (62); When the bag-transfer suction cup assembly (62) is in a high position, the suction cup group on it is located below the packaging bag (9) and is in operation; at the handover station, the bag-transfer suction cup assembly (62) is in a high position, and the upper side of the receiving suction cup group (65) contacts the packaging bag (9) to achieve handover; the packaging bags (9) at the detection station and sealing station are both located between the support assembly (63) and the exhaust assembly (64); when the bag-transfer suction cup assembly (62) is in a low position, the packaging bags (9) at the detection station and sealing station are placed on the support assembly. On component (63); when the bag transfer suction cup assembly (62) is in a high position, the upper sides of the receiving suction cup group (65) and the transfer suction cup group (66) are higher than the support assembly (63), and the packaging bags (9) at the detection station and sealing station are located above the support assembly (63); the exhaust assembly (64) is located directly above the packaging bag (9); when the exhaust assembly (64) is in a low position, it presses against the upper side of the packaging bag (9) to exhaust air; the upper end of the push plate (67) is always located above the support assembly (63); The support assembly (63) includes a short support plate (72) and two long support plates (71), both of which are horizontally arranged in the left-right direction. The short support plate (72) is located at the sealing station, directly behind the sealing device (8), and below the front of the packaging bag (9) at the sealing station. It is located directly in front of the end of the long support plate (71) near the sealing device (8), and is shorter than the long support plate (71). The two long support plates (71) are arranged side by side, one in front of the other, and are located in the middle and the other in the rear of the packaging bag (9), respectively. The bag is located on the lower side of the exhaust assembly (64), directly below it. At the inspection station, when the bag transfer suction cup assembly (62) is in a low position, the packaging bag (9) is placed on two long support plates (71). At the sealing station, when the bag transfer suction cup assembly (62) is in a low position, the front part of the packaging bag (9) is placed on a short support plate (72), and the middle and rear parts are placed on two long support plates (71) respectively. The suction cups on the receiving suction cup group (65) and the transfer suction cup group (66) are arranged alternately with the three support plates so that the bag transfer suction cup assembly (62) can move left and right. The visual inspection device (7) includes a camera and a light source; the camera is located directly above the front end of the packaging bag (9) at the inspection station, above the exhaust assembly (64), and is set vertically downward. The light source is located directly below the camera, which is below the support assembly (63).

6. The automatic packaging system for tie-on face masks according to claim 5, characterized in that, The sealing device (8) is located in front of the packaging bag (9) at the sealing station and can move back and forth. The sealing device (8) includes a sealing slide (81) that can move back and forth, a sealing bracket (82) on the sealing slide (81), an upper sealing head that can move up and down behind the sealing bracket (82), a lower sealing head that can move up and down behind the sealing bracket (82), and two sorting claws (83) behind the sealing bracket (82). The upper sealing head and the lower sealing head are both arranged in the left and right direction and cooperate with the front end of the packaging bag (9). They are located above and below the packaging bag (9) respectively. The two sorting claws (83) are arranged opposite to each other and can move away from each other in the left and right direction. They are located in front of the left and right ends of the packaging bag (9) at the sealing station respectively. The sorting claws (83) can clamp the upper and lower sides of the packaging bag (9) and are located adjacent to the rear of the upper sealing head and the lower sealing head. When the sealing slide (81) moves to the rear end, the upper sealing head and the lower sealing head are located directly above and directly below the front end of the packaging bag (9) at the sealing station, respectively, and can move toward the packaging bag (9) and press against the corresponding side of the packaging bag (9); the short support plate (72) is located behind the adjacent two sorting claws (83); Before sealing, two sorting jaws (83) clamp the left and right ends of the packaging bag (9) respectively and move apart to sort the front end of the packaging bag (9).

7. The automatic packaging system for tie-on face masks according to claim 6, characterized in that, The bag inlet suction cup assembly (32) is a U-shaped structure arranged in the left and right direction and open towards the primary bag opening device (4), with two suction cups arranged side by side on each of its two arms; the bag opening gripper (42) and the clamping gripper (43) are U-shaped structures arranged in the left and right direction and open towards the packaging bag discharge device (3), with two suction cups arranged side by side on each of the two gripping arms of the bag opening gripper (42); when the bag inlet suction cup assembly (32) moves towards the primary bag opening device (4), its two arms are respectively located at the opening of the upper gripping arm of the bag opening gripper (42) and the clamping gripper (43); The front long support plate (71) is mounted on the frame (1) via a column near the sealing device (8). The column is vertically positioned and located below the corresponding long support plate (71). The bag transfer suction cup assembly (62) has two short arms arranged side by side at one end near the primary bag opening device (4), and two long arms arranged side by side at the other end. Both the short and long arms are arranged in the left-right direction. The receiving suction cup group (65) and the transfer suction cup group (66) each include two suction cups arranged side by side. The two suction cups of the receiving suction cup group (65) are respectively located at the ends of the two short arms. There are two push plates (67). 67) The push plate (67) is perpendicular to the long arm and is respectively located at the ends of the two long arms; the distance between the handover station and the inspection station is equal to the distance between the inspection station and the sealing station; the distance between the receiving suction cup group (65) and the transfer suction cup group (66) is equal to the distance between the handover station and the inspection station and is greater than the distance between the transfer suction cup group (66) and the push plate (67); when the receiving suction cup group (65) is located at the handover station, the two short arms are respectively located in the opening of the lower clamping arm of the bag opening claw (42) and the clamping claw (43); when the receiving suction cup group (65) is located at the inspection station, the column is located between the two long arms.

8. The automatic packaging system for tie-on face masks according to claim 7, characterized in that, A horizontal plate (26) is provided between the two vertical beams of the portal frame (25); the horizontal plate (26) is arranged in the left and right direction, and is located adjacent to the rear of the material bin (211) at the clamping end. A rectangular hole is provided on its upper left and right side for the movable clamping plate (233) and the fixed clamping plate (232) and the mask stack between them to pass through backward; the secondary bag opening device (5) and the anti-backflow baffle (214) are both located on the rear side of the horizontal plate (26). The movable clamping plate (233) is located directly above the middle of the rectangular hole. The secondary bag opening device (5) includes two bag opening components that move synchronously towards each other or away from each other in the left and right directions; the two bag opening components are located at the left and right ends of the front end of the packaging bag (9), respectively, and are located at the left and right ends of the rectangular hole. Their movement away from each other realizes secondary bag opening.

9. The automatic packaging system for tie-on face masks according to claim 7, characterized in that, The bag opening device (4) is located on the right side of the frame (1), the sealing device (8) is located on the left side of the frame (1), the bag opening gripper (42) and the clamping gripper (43) are located on the left side of the bag opening longitudinal translation mechanism (41), the packaging bag discharge device (3) is located on the left side of the bag opening device (4), the fixed clamping plate (232) and the movable clamping plate (233) are both located on the right side of the clamping longitudinal translation mechanism (231); the right end of the feeding device (2) is the receiving end, and its left end is the clamping end; the handover station, the detection station and the sealing station are arranged sequentially from right to left, the receiving suction cup group (65) is located on the right end of the bag transfer suction cup assembly (62), and the push plate (67) is located on the left end of the bag transfer suction cup assembly (62).

10. A method for automatically packaging face masks using an automatic packaging system as described in any one of claims 1-9, characterized in that, The method includes: Packaging bag feeding: The bag feeding suction cup assembly (32) moves toward the gripper assembly. At this time, the gripper assembly is located at the rear end and its two gripping arms are in the open state. The front and rear parts of the packaging bag (9) are located at the bag opening gripper (42) and the clamping gripper (43) respectively. The clamping gripper (43) clamps the packaging bag (9), the bag feeding suction cup assembly (32) releases the packaging bag (9) and returns to its original position. Then, the bag opening longitudinal slide moves forward, the bag opening gripper (42) clamps and then opens, and the suction cup on it works to open the bag once. When the longitudinal slide of the bag opening device reaches the front end, the front end of the packaging bag (9) is open and fitted onto the secondary bag opening device (5). The secondary bag opening device (5) performs secondary bag opening and then the clamping jaws (43) are released. Mask feeding and bagging: When receiving materials, the receiving plate is in a high position and moves backward to directly above the material bin (211). At this time, the telescopic pressure bar (213) is in a retracted state, the two interlocking partitions (212) are in an extended state, the top of the mask stack is pressed between the receiving plate and the folding chamber (10) and moves downward with the receiving plate into the material bin (211); after receiving materials, the receiving plate returns to its original position, and the telescopic pressure bar (213) becomes an extended state; The hopper (211) moves from the receiving end to the clamping end, and the telescopic pressure rod (213) and the two interlocking partitions (212) are both in the extended state; During feeding, the longitudinal slide of the clamping device moves backward, and the rear ends of the fixed clamping plate (232) and the movable clamping plate (233) move backward into the hopper (211). The rear end of the fixed clamping plate (232) is located below the adjacent interlocking partition (212), and the rear end of the movable clamping plate (233) is located above the adjacent telescopic pressure bar (213). Then, the movable clamping plate (233) moves downward. At the same time, the telescopic pressure bar (213) and the two interlocking partitions (212) are retracted. The pressing structure (24) moves downward and presses against the upper side of the movable clamping plate (233). The movable clamping plate (233) moves downward to the low position, and the mask stack is clamped between the movable clamping plate (233) and the fixed clamping plate (232). During bagging, the clamping longitudinal slide continues to move backward, the movable clamp (233) and the fixed clamp (232) extend backward out of the discharge port and are inserted into the packaging bag (9). Then, the anti-backflow baffle (214) descends, the clamping longitudinal slide moves forward again to bring the rear end of the movable clamp (233) to the front end of the mask stack, and the movable clamp (233) moves upward. At the same time, the pressing structure (24) returns to its upward position. Then, the movable clamp (233) moves downward to clamp the front end of the mask stack. At the same time, the pressing structure (24) moves downward, and the anti-backflow baffle (214) returns to its upward position. Then, the clamping longitudinal slide moves backward again to convey the mask stack backward. Finally, the clamping longitudinal slide returns forward, and the pressing structure (24) returns to its upward position. After the bagging is completed, the bag opening longitudinal slide moves backward to the handover station; Transfer and inspection: During the handover, the receiving suction cup group (65) is located at the handover station and is located below the packaging bag (9) on the gripper assembly. At this time, the receiving suction cup group (65) is in a high position; the clamping gripper (43) is released and the suction cup of the bag opening gripper (42) is not working; after the handover is completed, the bag opening longitudinal slide moves backward to return to its original position. The bag transfer suction cup assembly (62) moves horizontally and then downward to a low position. The push plate (67) pushes the packaging bag (9) at the sealing station away from the support assembly (63). The transfer suction cup assembly (66) is located at the sealing station and transfers the packaging bag (9) at the inspection station to the sealing station. The receiving suction cup assembly (65) is located at the inspection station and transfers the packaging bag (9) at the handover station to the inspection station. At the inspection station, the packaging bag (9) is placed on the support assembly (63). The exhaust assembly (64) descends to exhaust air from the packaging bag (9). The visual inspection device (7) performs visual inspection on the front end of the packaging bag (9). At the same time, the bag transfer suction cup assembly (62) returns to its original position. Sealing: At the sealing station, the front part of the packaging bag (9) is placed on the short support plate (72), and the middle and rear parts are placed on two long support plates (71) respectively; the exhaust assembly (64) descends to exhaust and clamp the packaging bag (9); the sealing slide (81) moves backward, and the two sorting claws (83) clamp the left and right ends of the packaging bag (9) respectively and move apart to sort the front end of the packaging bag (9); after sorting, the upper sealing head and the lower sealing head move toward the packaging bag (9) to seal; after sealing, the two sorting claws (83) are released, the upper sealing head and the lower sealing head return to their original positions, and the sealing slide (81) returns to its original position forward; Discharge: After sealing is completed, the left and right movement of the bag suction cup assembly (62) allows the push plate (67) to push the packaging bag (9) at the sealing station away from the support assembly (63).

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