A soft pack bag opening and sleeving device

Abstract

The utility model discloses a kind of soft packing bag opening bagging devices, it includes base, bag grabbing component, up-down driver, opening drive mechanism and bagging front suction nozzle preheating mechanism. Base is provided with suction nozzle entry position. Bag grabbing component includes front suction disc component and rear suction disc component, front suction disc component and rear suction disc component are respectively provided with front suction disc and rear suction disc, and bag mouth end gripping position is formed between front suction disc and rear suction disc;Bag grabbing component is movable up and down and is respectively provided with bag entry position and bagging position from top to bottom, in bagging position, bag mouth end gripping position of bag grabbing component moves to suction nozzle entry position. Bagging front suction nozzle preheating mechanism is set corresponding suction nozzle entry position, and is used to heat suction nozzle in suction nozzle entry position before bag mouth end gripping position moves to suction nozzle entry position. The above-mentioned soft packing bag opening bagging device helps to improve the quality of subsequent welding.

Description

Technical Field

[0001] This utility model relates to packaging production equipment, and in particular to a flexible packaging bag opening and sealing device. Background Technology

[0002] Existing spout pouch production lines require opening the bag's opening and then attaching it to the spout during production. This is achieved using a flexible packaging bag opening and attaching device. After attaching, the bag and spout are then transferred to a welding station where they are welded together using external heating. In this current production process, due to the thickness difference between the spout and the bag, the heat-sealing welding mold struggles to heat both evenly, leading to weak welds, especially for bags made of a single material with poor heat resistance, resulting in inconsistent weld quality. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a flexible packaging bag opening and sealing device, which helps to improve the quality of subsequent welding.

[0004] A flexible packaging bag opening and bagging device according to an embodiment of the present invention includes: a base with a suction nozzle inlet position; a bag gripping assembly including a front suction cup assembly and a rear suction cup assembly, wherein the front suction cup assembly has a rearward-facing front suction cup and the rear suction cup assembly has a forward-facing rear suction cup, the front suction cup and the rear suction cup are arranged opposite each other and form a bag opening end gripping position between them; the bag gripping assembly is movably disposed on the base and has a bag entry position and a bag covering position respectively arranged from top to bottom, wherein the bag opening end gripping position of the bag gripping assembly moves to the suction nozzle inlet position at the bag covering position; a vertical drive is configured to drive the bag gripping assembly to move up and down; an opening drive mechanism is configured to drive the front suction cup assembly and the rear suction cup assembly to move closer to each other and further away from each other; and a bag covering pre-suction nozzle preheating mechanism is disposed corresponding to the suction nozzle inlet position and is used to heat the suction nozzle in the suction nozzle inlet position before the bag opening end gripping position moves to the suction nozzle inlet position.

[0005] According to an embodiment of the present utility model, a soft packaging bag opening and bagging device has at least the following beneficial effects: since the suction nozzle is preheated, a pre-heated connection can be formed between the suction nozzle and the packaging bag after the packaging bag is put into the suction nozzle. Subsequently, it is transferred to the welding station for final welding and fixing, resulting in uniform welding and good welding quality.

[0006] According to some embodiments of the present utility model, the preheating mechanism for the bagging nozzle includes a front heating block, a rear heating block, and a heating block driving structure. The front heating block and the rear heating block are respectively disposed on the front and rear sides of the nozzle entry position. A nozzle adaptation cavity is respectively provided on the opposite side of the front heating block and the rear heating block. The heating block driving structure is configured to drive the front heating block and the rear heating block to move closer to each other and further away from each other.

[0007] According to some embodiments of the present utility model, the bag gripping assembly includes a synchronous linkage mechanism, and the front suction cup assembly and the rear suction cup assembly are linked to each other through the synchronous linkage mechanism. The synchronous linkage mechanism is used to make the front suction cup assembly and the rear suction cup assembly move closer to each other synchronously and move further away from each other synchronously.

[0008] According to some embodiments of the present invention, the bag-grabbing assembly includes a connecting seat, which is movably disposed on the base; the synchronous linkage mechanism includes a front swing rod, a rear swing rod, and a linkage rod; the front suction cup assembly is fixed to the lower end of the front swing rod, and the front swing rod is hinged to the connecting seat so that the front suction cup assembly can swing back and forth relative to the connecting seat; the rear suction cup assembly is fixed to the lower end of the rear swing rod, and the rear swing rod is hinged to the connecting seat so that the rear suction cup assembly can swing back and forth relative to the connecting seat; the two ends of the linkage rod are respectively hinged to the front swing rod and the connecting seat. The rear swing arm is defined as follows: the hinge axis between the front swing arm and the connecting seat is defined as the front swing axis; the hinge axis between the rear swing arm and the connecting seat is defined as the rear swing axis; the hinge axis between the linkage rod and the front swing arm is defined as the front hinge axis; and the hinge axis between the linkage rod and the rear swing arm is defined as the rear hinge axis. The position of the front hinge axis is lower than the front swing axis and the position of the rear hinge axis is higher than the rear swing axis, or the position of the front hinge axis is higher than the front swing axis and the position of the rear hinge axis is lower than the rear swing axis.

[0009] In some embodiments of the present invention, the synchronous linkage mechanism is provided in two sets and is respectively located at the left and right ends of the front suction cup assembly and the rear suction cup assembly.

[0010] In some embodiments of the present invention, the opening drive mechanism is a telescopic device, which is hinged to the connecting seat and has a telescopic end that is hinged to the rear suction cup assembly.

[0011] In some embodiments of the present invention, a bag guiding mechanism is further included, which is fixed to the base and is used to guide and position the packaging bag.

[0012] According to some embodiments of the present invention, the bag guiding mechanism includes a left guide shell and a right guide shell, which are spaced apart from each other. The left guide shell is provided with a left guide channel, which includes a left conical section and a left straight section. The larger end of the left conical section is located on the upper side and has an upward-facing left entry opening. The left straight section extends vertically and its upper end is connected to the smaller end of the left conical section. The lower end of the left straight section has a left exit opening. The right guide shell is provided with a right guide channel, which includes a right conical section and a right straight section. The larger end of the right conical section is located on the upper side and has an upward-facing right entry opening. The right straight section extends vertically and its upper end is connected to the smaller end of the right conical section. The lower end of the right straight section has a right exit opening. The left guide channel and the right guide channel are arranged opposite each other and both have openings on their closest sides. The front suction cup and the rear suction cup are provided on the front and rear sides between the left and right straight sections.

[0013] According to some embodiments of the present invention, a limiting and positioning mechanism is further included. The limiting and positioning mechanism is disposed on the base and used to position the upper and lower limit positions of the bag gripping assembly to form the bag inlet position and the bag fitting position, respectively.

[0014] According to some embodiments of the present utility model, at least two sets of the suction nozzle entry position, the bag opening gripping position, and the preheating mechanism for the suction nozzle before bagging are provided respectively.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present invention; Figure 3 This is a three-dimensional schematic diagram of an embodiment of the present invention after a packaging bag is inserted at the bag inlet and the bag opening is opened; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a three-dimensional schematic diagram of the bagging position in an embodiment of the present invention; Figure 6This is one of the perspective views of the bag guiding mechanism according to an embodiment of the present utility model; Figure 7 This is a second perspective view of the bag guiding mechanism according to an embodiment of the present utility model.

[0017] Figure label: Packaging bag 1, nozzle 2; Base 100, nozzle inlet 110, crossbar 120; Bag gripping assembly 200, front suction cup assembly 210, rear suction cup assembly 220, synchronous linkage mechanism 230, connecting seat 240, front suction cup 211, rear suction cup 221, front swing arm 231, rear swing arm 232, linkage rod 233. Upper and lower drivers 300; Opening drive mechanism 400; The bagging nozzle preheating mechanism 500, the front heating block 510, the rear heating block 520, and the heating block drive structure 530 are included. Bag guiding mechanism 600, left guide shell 610, right guide shell 620, left guide channel 611, right guide channel 621, left conical section 612, left straight section 613, left entry opening 614, left exit opening 615, right conical section 622, right straight section 623, right entry opening 624, right exit opening 625; Limiting and positioning mechanism 700, upper abutment block 710, lower abutment block 720; Lower buffer mechanism 800. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 7 A flexible packaging bag opening and bagging device includes: a base 100, a bag gripping assembly 200, an upper and lower driver 300, an opening drive mechanism 400, and a bagging preheating mechanism 500. The base 100 is provided with a suction inlet position 110. The bag gripping assembly 200 includes a front suction cup assembly 210 and a rear suction cup assembly 220. The front suction cup assembly 210 is provided with a rearward-facing front suction cup 211, and the rear suction cup assembly 220 is provided with a front-facing rear suction cup 221. The front suction cup 211 and the rear suction cup 221 are arranged opposite each other and form a bag opening end gripping position between them. The bag gripping assembly 200 is movably mounted on the base 100 and is provided with a bag entry position and a bagging position from top to bottom. In the bagging position, the bag opening end gripping position of the bag gripping assembly 200 moves to the suction inlet position 110. The up-down driver 300 is configured to drive the bag gripping assembly 200 to move up and down, and the opening drive mechanism 400 is configured to drive the front suction cup assembly 210 and the rear suction cup assembly 220 to move closer and further apart. The bag-feeding nozzle preheating mechanism 500 is set corresponding to the nozzle entry position 110 and is used to heat the nozzle in the nozzle entry position 110 before the bag opening gripping position moves to the nozzle entry position 110.

[0023] When the above-described device is in operation, the opening of the packaging bag 1 faces downwards, and the front suction cup assembly 210 and the rear suction cup assembly 220 of the bag gripping assembly 200 hold the opening of the bag. The external suction nozzle 2 flows to the suction nozzle entry position 110. First, the suction nozzle 2 is preheated by the pre-bag-fitting suction nozzle preheating mechanism 500. Then, the opening drive mechanism 400 drives the front suction cup assembly 210 and the rear suction cup assembly 220 to move away from each other, thereby opening the bag opening. Then, the up-down drive 300 drives the bag gripping assembly 200 to move downwards to the bag-fitting position, thereby fitting the opened packaging bag 1 onto the suction nozzle 2. Because the suction nozzle 2 is preheated, a pre-heat-melted connection can be formed between the suction nozzle 2 and the packaging bag 1 after the packaging bag 1 is fitted onto the suction nozzle 2. Subsequently, it flows to the welding station for final welding and fixing, resulting in uniform welding and good welding quality.

[0024] In this embodiment, the preheating mechanism 500 for the bagging nozzle includes a front heating block 510, a rear heating block 520, and a heating block driving structure 530. The front heating block 510 and the rear heating block 520 are respectively disposed on the front and rear sides of the nozzle entry position 110. A nozzle adaptation cavity is provided on each opposite side of the front heating block 510 and the rear heating block 520. The heating block driving structure 530 is configured to drive the front heating block 510 and the rear heating block 520 to move closer and further apart. During preheating, after the nozzle 2 enters the nozzle entry position 110, the heating block driving structure 530 drives the front heating block 510 and the rear heating block 520 to move closer together and contact the nozzle 2 through the corresponding nozzle adaptation cavities, thereby heating the nozzle 2. The preheating mechanism described above has a simple structure and is easy to implement.

[0025] In this embodiment, the heating block driving structure 530 includes two cylinders corresponding to the front heating block 510 and the rear heating block 520, respectively, which drive the corresponding heating blocks to move. It is conceivable that the heating block driving structure 530 is not limited to using two cylinders; for example, it could use two electric push rods or two electromagnets. Alternatively, in some embodiments, a single cylinder, electric push rod, or electromagnet could be used, with a linkage mechanism driving the front heating block 510 and the rear heating block 520 to move synchronously closer and farther apart.

[0026] It is conceivable that in other embodiments, the preheating mechanism 500 for the bagging nozzle is not limited to a heating block structure, but may also employ a hot air structure, which can be configured according to the actual situation.

[0027] In this embodiment, the bag-gripping assembly 200 includes a synchronization linkage mechanism 230. The front suction cup assembly 210 and the rear suction cup assembly 220 are linked together via the synchronization linkage mechanism 230. The synchronization linkage mechanism 230 is used to make the front suction cup assembly 210 and the rear suction cup assembly 220 move closer and further apart synchronously. Using the above structure, the synchronization linkage mechanism 230 enables the front suction cup assembly 210 and the rear suction cup assembly 220 to move synchronously, thus ensuring symmetrical and accurate opening of the bag opening. It also facilitates driving only one suction cup assembly to complete the action, simplifying the drive structure.

[0028] In this embodiment, the bag-gripping assembly 200 includes a connecting seat 240, which is movably mounted on the base 100. The synchronous linkage mechanism 230 includes a front swing rod 231, a rear swing rod 232, and a linkage rod 233. The front suction cup assembly 210 is fixed to the lower end of the front swing rod 231, and the front swing rod 231 is hinged to the connecting seat 240 so that the front suction cup assembly 210 can swing back and forth relative to the connecting seat 240. The rear suction cup assembly 220 is fixed to the lower end of the rear swing rod 232, and the rear swing rod 232 is hinged to the connecting seat 240 so that the rear suction cup assembly 220 can swing back and forth relative to the connecting seat 240. The connecting seat 240 swings back and forth. The two ends of the linkage rod 233 are hinged to the front swing rod 231 and the rear swing rod 232, respectively. The hinge axis between the front swing rod 231 and the connecting seat 240 is defined as the forward swing axis; the hinge axis between the rear swing rod 232 and the connecting seat 240 is defined as the rear swing axis; the hinge axis between the linkage rod 233 and the front swing rod 231 is defined as the front hinge axis; and the hinge axis between the linkage rod 233 and the rear swing rod 232 is defined as the rear hinge axis. The position of the front hinge axis is lower than the front swing axis, and the position of the rear hinge axis is higher than the rear swing axis. When the front suction cup assembly 210 swings forward, the linkage rod 233 pulls the rear swing rod 232 above its hinge axis, causing the rear swing rod 232 and the rear suction cup assembly 220 to swing backward, thus moving the front suction cup assembly 210 and the rear suction cup assembly 220 away from each other. Similarly, when the rear suction cup assembly 220 swings backward, it also drives the front suction cup assembly 210 to swing forward. When the front suction cup assembly 210 swings backward, it pushes the rear swing arm 232 backward above its hinge axis via the linkage rod 233, causing the rear swing arm 232 and the rear suction cup assembly 220 to swing forward, thus bringing the front suction cup assembly 210 and the rear suction cup assembly 220 closer together. Similarly, when the rear suction cup assembly 220 swings forward, it also drives the front suction cup assembly 210 to swing backward. In other embodiments, the position of the front hinge axis can be set higher than the front swing axis and the position of the rear hinge axis can be set lower than the rear swing axis, achieving the same linkage function. The aforementioned synchronous linkage mechanism 230 uses a multi-link structure to achieve synchronous linkage. Compared with the gear-based synchronization structure in the prior art, it has no meshing friction, resulting in less wear, better durability, smoother linkage operation, and no meshing gap.

[0029] In one embodiment, the two ends of the connecting seat 240 are slidably mounted on two guide rods provided on the base 100 via linear bearings. The guide rods are vertically positioned, allowing the connecting seat 240 to move up and down. In other embodiments, the bag-gripping assembly 200 can also be movably mounted on the base 100 via a linear guide rail.

[0030] In this embodiment, the synchronous linkage mechanism 230 is provided in two sets and is respectively located at the left and right ends of the front suction cup assembly 210 and the rear suction cup assembly 220, thereby forming a linkage between the two ends and making the operation more stable.

[0031] In this embodiment, the opening drive mechanism 400 is a telescopic device, hinged to the connecting seat 240. The telescopic device has a telescopic end, which is hinged to the rear suction cup assembly 220. Alternatively, in this embodiment, the telescopic device can be a cylinder, with its cylinder body and piston ends respectively hinged to the connecting seat 240 and the rear suction cup assembly 220. This allows the rear suction cup assembly 220 to move relative to the connecting seat 240, thereby enabling the front suction cup assembly 210 and the rear suction cup assembly 220 to move closer and further apart. It is conceivable that the telescopic device is not limited to a cylinder; for example, an electric actuator or an electromagnet could be used.

[0032] It is conceivable that the opening drive mechanism 400 is not limited to the above structure. For example, a guide structure can be set so that when the bag gripping assembly 200 moves downward, the guide structure can guide the front suction cup assembly 210 and the rear suction cup assembly 220 to move away from each other so as to open the packaging bag 1.

[0033] In this embodiment, a bag guiding mechanism 600 is also included. The bag guiding mechanism 600 is fixed to the base 100 and is used to guide and position the packaging bag. By setting up the bag guiding mechanism 600, the packaging bag 1 can be easily guided and positioned, ensuring that the operation can proceed smoothly.

[0034] In this embodiment, the bag guiding mechanism 600 includes a left guide shell 610 and a right guide shell 620, which are spaced apart from each other. The left guide shell 610 has a left guide channel 611, which includes a left conical section 612 and a left straight section 613. The larger end of the left conical section 612 is located on the upper side and has an upward-facing left entry opening 614. The left straight section 613 extends vertically and its upper end connects with the smaller end of the left conical section 612. The lower end of the left straight section 613 has a left exit opening 615. The right guide shell 620 has a right guide channel 610. The right guide channel 621 includes a right conical section 622 and a right straight section 623. The larger end of the right conical section 622 is located on the upper side and has an upward-facing right entry opening 624. The right straight section 623 extends vertically and its upper end connects with the smaller end of the right conical section 622. The lower end of the right straight section 623 has a right exit opening 625. The left guide channel 611 and the right guide channel 621 are arranged opposite each other and both have openings on their adjacent sides. A front suction cup 211 and a rear suction cup 221 are provided on the front and rear sides between the left straight section 613 and the right straight section 623.

[0035] When the bag is inserted, the left and right sides of the packaging bag 1 can be aligned with the left entry opening 614 and the right entry opening 624 respectively. Guided by the left conical section 612 and the right conical section 622, the bag opening of the packaging bag 1 finally enters the left straight section 613 and the right straight section 623 and is gripped by the front suction cup 211 and the rear suction cup 221. As the bag gripping assembly 200 moves the packaging bag 1 downwards, the left straight section 613 and the right straight section 623 can position and guide the left and right sides of the packaging bag 1, ensuring the reliability of the operation. The bag guiding mechanism 600 described above has a simple structure, is easy to implement, and provides stable and accurate guidance. It is conceivable that in other embodiments, the bag guiding mechanism 600 can also have other structures, such as guide rollers, etc., which can be set according to the actual situation.

[0036] In this embodiment, the base 100 is provided with a crossbar 120, which extends in a left-right direction. The upper ends of the left guide shell 610 and the right guide shell 620 are connected to the crossbar 120. The crossbar 120 has multiple mounting holes arranged in a left-right direction. The upper ends of the left guide shell 610 and the right guide shell 620 are provided with left-right extending slots through which screws pass. The screws can be threaded into any of the mounting holes. Through the structure of the slots and the multiple left-right arranged mounting holes, the left-right position of the left guide shell 610 and the right guide shell 620 can be easily adjusted to adapt to different situations.

[0037] In this embodiment, a limiting and positioning mechanism 700 is also included. The limiting and positioning mechanism 700 is disposed on the base 100 and used to position the upper and lower limit positions of the bag-gripping assembly 200 to respectively form the bag-entry position and the bag-covering position. Using the above structure, the upper and lower positions of the bag-gripping assembly 200 can be limited and positioned, facilitating accurate positioning. Of course, in some embodiments, when using some up-and-down actuators 300 capable of positioning actions, such as linear motors, lead screw moving platforms, etc., the limiting and positioning mechanism 700 may not be necessary. In this embodiment, the limiting and positioning mechanism 700 includes an upper abutment block 710 and a lower abutment block 720, which are respectively disposed on the upper and lower sides of the connecting seat 240 of the bag-gripping assembly 200.

[0038] In this embodiment, a lower buffer mechanism 800 is also included. The lower buffer mechanism 800 is used to buffer the bag gripping assembly 200 when it moves downward to the bag-covering position, thereby improving the smoothness of the mechanism's operation. In this embodiment, the lower buffer mechanism 800 can be a damper or a spring.

[0039] In the embodiment, at least two sets of suction nozzle entry position 110, bag opening end gripping position and suction nozzle preheating mechanism 500 are provided respectively, thereby improving production efficiency.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A flexible packaging bag opening and bagging device, characterized in that, include: The base (100) is provided with a suction nozzle inlet (110); The bag gripping assembly (200) includes a front suction cup assembly (210) and a rear suction cup assembly (220). The front suction cup assembly (210) is provided with a rearward-facing front suction cup (211), and the rear suction cup assembly (220) is provided with a front-facing rear suction cup (221). The front suction cup (211) and the rear suction cup (221) are arranged opposite each other and form a bag opening gripping position between them. The bag gripping assembly (200) is movably disposed on the base (100) and is provided with a bag entry position and a bag fitting position from top to bottom. In the bag fitting position, the bag opening gripping position of the bag gripping assembly (200) moves to the suction nozzle entry position (110). The up-down driver (300) is configured to drive the bag gripping assembly (200) to move up and down; An opening drive mechanism (400) is configured to drive the front suction cup assembly (210) and the rear suction cup assembly (220) to move closer and further apart from each other; A preheating mechanism (500) for the suction nozzle before bagging is provided corresponding to the suction nozzle entry position (110) and is used to heat the suction nozzle in the suction nozzle entry position (110) before the bag opening gripping position moves to the suction nozzle entry position (110).

2. The flexible packaging bag opening and bagging device according to claim 1, characterized in that: The preheating mechanism (500) for the bagging nozzle includes a front heating block (510), a rear heating block (520), and a heating block driving structure (530). The front heating block (510) and the rear heating block (520) are respectively disposed on the front and rear sides of the nozzle entry position (110). The front heating block (510) and the rear heating block (520) are respectively provided with nozzle adaptation cavities on opposite sides. The heating block driving structure (530) is configured to drive the front heating block (510) and the rear heating block (520) to move closer to each other and further away from each other.

3. The flexible packaging bag opening and bagging device according to claim 1, characterized in that: The bag gripping assembly (200) includes a synchronous linkage mechanism (230). The front suction cup assembly (210) and the rear suction cup assembly (220) are linked together through the synchronous linkage mechanism (230). The synchronous linkage mechanism (230) is used to make the front suction cup assembly (210) and the rear suction cup assembly (220) move closer to each other and move further away from each other synchronously.

4. The flexible packaging bag opening and bagging device according to claim 3, characterized in that: The bag-grabbing assembly (200) includes a connecting seat (240), which is movably mounted on the base (100). The synchronous linkage mechanism (230) includes a front swing rod (231), a rear swing rod (232), and a linkage rod (233). The front suction cup assembly (210) is fixed to the lower end of the front swing rod (231), and the front swing rod (231) is hinged to the connecting seat (240) so that the front suction cup assembly (210) can swing back and forth relative to the connecting seat (240). The rear suction cup assembly (220) is fixed to the lower end of the rear swing rod (232), and the rear swing rod (232) is hinged to the connecting seat (240) so that the rear suction cup assembly (220) can swing back and forth relative to the connecting seat (240). The linkage rod... (233) is hinged at both ends to the front swing rod (231) and the rear swing rod (232) respectively. The hinge axis between the front swing rod (231) and the connecting seat (240) is defined as the front swing axis. The hinge axis between the rear swing rod (232) and the connecting seat (240) is defined as the rear swing axis. The hinge axis between the linkage rod (233) and the front swing rod (231) is defined as the front hinge axis. The hinge axis between the linkage rod (233) and the rear swing rod (232) is defined as the rear hinge axis. The position of the front hinge axis is lower than the front swing axis and the position of the rear hinge axis is higher than the rear swing axis, or the position of the front hinge axis is higher than the front swing axis and the position of the rear hinge axis is lower than the rear swing axis.

5. The flexible packaging bag opening and bagging device according to claim 3 or 4, characterized in that: The synchronous linkage mechanism (230) is provided in two sets and is respectively located at the left and right ends of the front suction cup assembly (210) and the rear suction cup assembly (220).

6. The flexible packaging bag opening and bagging device according to claim 4, characterized in that: The opening drive mechanism (400) is a telescopic device, which is hinged to the connecting seat (240). The telescopic device is provided with a telescopic end, which is hinged to the rear suction cup assembly (220).

7. The flexible packaging bag opening and bagging device according to claim 1, characterized in that: It also includes a bag guiding mechanism (600), which is fixed to the base (100) and is used to guide and position the packaging bag.

8. The flexible packaging bag opening and bagging device according to claim 7, characterized in that: The bag guiding mechanism (600) includes a left guide shell (610) and a right guide shell (620), which are spaced apart from each other. The left guide shell (610) is provided with a left guide channel (611), which includes a left conical section (612) and a left straight section (613). The larger end of the left conical section (612) is located on the upper side and has an upward-facing left entry opening (614). The left straight section (613) extends vertically and its upper end is connected to the smaller end of the left conical section (612). The lower end of the left straight section (613) has a left exit opening (615). The right guide shell (620) is provided with a right guide channel. (621) The right guide channel (621) includes a right conical section (622) and a right straight section (623). The large end of the right conical section (622) is located on the upper side and has an upward-facing right entry opening (624). The right straight section (623) extends vertically and its upper end connects with the small end of the right conical section (622). The lower end of the right straight section (623) has a right exit opening (625). The left guide channel (611) and the right guide channel (621) are arranged opposite each other and both have openings on the side that is close to each other. The front suction cup (211) and the rear suction cup (221) are arranged on the front and rear sides of the position between the left straight section (613) and the right straight section (623).

9. The flexible packaging bag opening and bagging device according to claim 1, characterized in that: It also includes a limiting and positioning mechanism (700), which is disposed on the base (100) and used to position the upper and lower limit positions of the bag gripping assembly (200) to form the bag entry position and the bag covering position respectively.

10. The flexible packaging bag opening and bagging device according to claim 1, characterized in that: At least two sets of the suction nozzle entry position (110), the bag opening gripping position, and the preheating mechanism for the suction nozzle before bagging are provided.

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