Automatic packaging equipment for plastic bag production and working method thereof

Abstract

The invention relates to the technical field of automatic packaging, and discloses automatic packaging equipment for plastic bag production and a working method thereof.The automatic packaging equipment comprises a folding mechanism, a lug punching mechanism, a plate lifting mechanism, a conveying belt, a material grabbing mechanical arm, a bag conveying mechanism and a bag opening mechanism; when the supporting plate rotates to be horizontal, the stabilizing plate is hidden in the supporting plate, the packaging bag is turned over to the surface of the supporting plate, and the plastic bag is prevented from falling out of the packaging bag in the mode of turning over the packaging bag. And the rolling shafts gradually diffuse towards the two sides in the middle of the stress plate to abut against the packaging bag, so that the packaging bag is closed again after being opened, the packaging bag is gradually abutted against from the middle to the two sides, the situation that the opening position is uneven is avoided, and sealing of the packaging bag is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automatic packaging, in particular to automatic packaging equipment for producing plastic bags and a working method thereof. Background Art

[0002] After the plastic bags are produced, they need to be folded by automatic packaging equipment and then put into packaging bags. This can improve production efficiency, realize fast and continuous operation process, and reduce manpower requirements. However, the packaging bags need to be sealed again after bagging. After bagging, the packaging bags are in the bag-supporting position, and one side of the packaging bags is not sealed. When the gripper transfers, it is easy for the plastic bags to fall out of the packaging bags, thereby affecting the stability of the packaging bag transfer. In addition, the sealing position is easily grasped by the gripper, causing the packaging bag at the sealing position to move, resulting in an uneven seal. Summary of the invention

[0003] The present invention provides an automatic packaging device for producing plastic bags and a working method thereof, which overcomes the shortcomings described in the background technology.

[0004] The technical solution adopted by the present invention to solve its technical problem is: An automatic packaging device for plastic bag production comprises a folding mechanism, an ear punching mechanism, a plate lifting mechanism, a conveyor belt, a material grabbing manipulator, a bag feeding mechanism and a bag holding mechanism. The bag feeding mechanism is provided with two and distributed on both sides of the plate lifting mechanism, and the packaging bag is conveyed from both sides of the bag feeding mechanism to the bag filling position of the bag holding mechanism and held open. The material grabbing manipulator grasps the plastic bag and puts it into the ear punching mechanism for punching. After punching, the material grabbing manipulator grasps the plastic bag and puts it into the folding mechanism for folding and feeding it into the bag holding mechanism position. The bag feeding mechanism conveys the packaging bag to the predetermined position of the bag holding mechanism for opening, and the plastic bag is loaded into the packaging bag at the bag holding mechanism position. The plate lifting mechanism seals the packaging bag inside the bag holding mechanism and transfers it to the conveyor belt. The lifting plate mechanism is provided with a workbench, a flipping mechanism, a connecting plate, a fixed plate, a hydraulic device and a telescope. The workbench is arranged inside the fixed plate. A hydraulic device is arranged inside the workbench. The side surface of the connecting plate is connected to the output end of the hydraulic device. The electric signal drives the hydraulic device to push the connecting plate to translate, so that the connecting plate drives the flipping mechanism to move to the left. The flipping mechanism is inserted into the lower side of the packaging bag at the position of the bag supporting mechanism. When the flipping mechanism rotates and translates, the sealing position of the packaging bag is located directly below the telescope. The electric signal drives the telescope to extend and retract. The electric signal drives the hot melt at the lower end of the telescope to make the hot melt packaging bag seal. After the flipping mechanism rotates, it pushes the packaging bag to move to the conveyor belt position for transmission.

[0005] A preferred technical solution: the flipping mechanism is provided with a slide plate, a support plate, a rotating rod and a stabilizing plate, wherein the stabilizing plate is arranged inside the support plate, the rotating rod is fixed to the upper end of the connecting plate, and the support plate rotates on a hinge inside the rotating rod, and the slide plate is arranged on the side of the support plate. When the connecting plate translates, the slide plate is inserted into the lower side of the packaging bag, and an electrical signal drives the stabilizing plate to flip to be parallel to the top of the slide plate, and the stabilizing plate presses against the open end of the packaging bag.

[0006] A preferred technical solution: a motor is provided at the outer end of the rotating rod, and an electrical signal drives the motor to flip the support plate 90°. When the support plate is flipped to be horizontal, the stabilizing plate rotates to be horizontal inside the support plate.

[0007] A better technical solution: the stabilizing plate is provided with an extrusion bar, a hydraulic box, a flap, a transfer mechanism, a connecting rod and a rotating shaft. The lower end of the connecting rod is arranged to rotate at the output end of the hydraulic box, and the upper end of the connecting rod moves at the right end of the flap. The rotating shaft is arranged in the supporting plate, and the flap rotates through the rotating shaft. The electrical signal drives the output end of the hydraulic box to extend and retract, and pushes the connecting rod to rotate the flap, so that the flipping mechanism rotates to a horizontal level with the rotating shaft as the center. The extrusion bar presses against the packaging bag and the surface of the slide plate. A small hydraulic press is arranged inside the flap, and the electrical signal drives the small hydraulic press to push the transfer mechanism, so that the transfer mechanism pushes the packaging bag under the flap.

[0008] A better technical solution: a hollow groove is provided in the support plate. When the support plate rotates, the hydraulic box pushes the flap to rotate and makes the flap enter the hollow groove position.

[0009] A better technical solution: the extrusion strip is provided with a sponge board, a roller, a plastic board and a force-bearing plate, the roller is arranged on the inner side of the plastic board at an angle of 15°, the sponge board is arranged at the lower edge of the force-bearing plate, the plastic board is symmetrically arranged at the lower end of the force-bearing plate, the force-bearing plate is fixed on the side of the flap to press the packaging bag, the roller at the lower end presses the middle position of the packaging bag, and under the pressing pressure, the plastic board tends to be horizontal, and the roller gradually spreads to both sides from the middle position of the force-bearing plate to press the packaging bag.

[0010] A better technical solution: the transfer mechanism is provided with a spring rod, a triangular bar, a push plate, a baffle plate and a load-bearing plate. The spring rod is arranged between the load-bearing plate and the push plate. The baffle plate is fixed inside the flap. The load-bearing plate is arranged on the output end of the small hydraulic press inside the flap. When the load-bearing plate translates, the push plate is driven to move by the spring rod, and the baffle plate blocks the expansion of the push plate. The push plate moves downward under the elasticity of the spring rod, and the triangular bar presses and pushes the packaging bag.

[0011] Based on the working method of the automatic packaging equipment for plastic bag production described above, the specific working method is as follows: S1: The material grabbing robot grabs the plastic bag to be packaged to the ear punching mechanism, flushes out the unnecessary part, and then continues to grab the plastic bag to the folding mechanism. After the folding mechanism faces the plastic bag, the material grabbing robot pushes the plastic bag to the bag support mechanism position, so that the packaging bag delivered by the bag feeding mechanism is opened at the bag support mechanism position. The packaging bag opened at the bag support mechanism position corresponds to the plastic bag pushed by the material grabbing robot, and is bagged under the push of the material grabbing robot; S2: After bagging is completed, the hydraulic device inside the lifting plate mechanism is driven by an electrical signal to push the connecting plate to move horizontally, so that the flipping mechanism is inserted into the lower side of the packaging bag at the left bag support mechanism position, and the packed packaging bag is moved under the reset of the hydraulic device; S3: When the slide plate is inserted into the lower side of the packaging bag, the stabilizing plate flips from the supporting plate position to above the slide plate, and the stabilizing plate presses against the opening position of the packaging bag; S4: After the packaging bag is moved, the electric signal drives the motor to pack the bag on the rotating rod, so that the support plate drives the slide plate to flip. During the flipping process, the stabilizing plate gradually rotates toward the support plate. At this time, the packaging bag stays on the surface of the support plate in a horizontal state, so that the sealing position of the packaging bag on the surface of the slide plate is directly below the telescope; S5: After the telescopic device is sealed downward, the packaging bag on the surface of the support plate is pushed to the conveyor belt position for transfer through the transfer mechanism in the stabilizing plate.

[0012] Compared with the prior art, this technical solution has the following advantages: The stabilizing plate is then turned over to the surface of the support plate, thereby preventing the plastic bag from falling out of the bag and folding the bag.

[0013] In the present invention, when the support plate is horizontal, the small hydraulic machine is driven by an electrical signal to drive the transfer mechanism, so that the packaging bag is pushed and transferred by the transfer mechanism on the surface of the support plate toward the conveyor belt. When the flap rotates to above the slide plate to press the packaging bag, the extrusion bar presses the opening position of the packaging bag. At this time, the roller starts to press at the middle position of the packaging bag, and gradually spreads the roller to press the packaging bag on both sides from the middle position of the force-bearing plate, so that the packaging bag is stretched and then closed again, and the packaging bag is gradually pressed from the middle to both sides to avoid unevenness of the opening position and prevent the sealing of the packaging bag from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 This is an overall diagram of the present invention.

[0016] Figure 2 It is a side view of the lifting plate mechanism.

[0017] Figure 3 It is a three-dimensional schematic diagram of the flipping mechanism.

[0018] Figure 4 A side view of the stabilizing plate.

[0019] Figure 5 This is a plan view of an extruded strip.

[0020] Figure 6 It is a three-dimensional schematic diagram of the transfer mechanism.

[0021] In the figure: folding mechanism-1, ear punching mechanism-2, plate lifting mechanism-3, conveyor belt-4, material grabbing manipulator-5, bag feeding mechanism-6, bag supporting mechanism-7.

[0022] Workbench-31, turning mechanism-32, connecting plate-33, fixing plate-34, hydraulic device-35, telescopic device-36.

[0023] Slide plate-321, support plate-322, rotating rod-323, stabilizing plate-324, hollow groove-3221.

[0024] Extrusion bar-41, hydraulic box-42, flap-43, transfer mechanism-44, connecting rod-45, rotating shaft-46.

[0025] Sponge board-411, roller-412, plastic board-413, force-bearing plate-414.

[0026] Spring rod-441, triangular bar-442, push plate-443, blocking plate-444, load-bearing plate-445. DETAILED DESCRIPTION

[0027] like Figures 1 to 6As shown, the present invention proposes an automatic packaging equipment for plastic bag production, including a folding mechanism 1, an ear punching mechanism 2, a lifting plate mechanism 3, a conveyor belt 4, a material grabbing manipulator 5, a bag feeding mechanism 6 and a bag holding mechanism 7, wherein two bag feeding mechanisms 6 are provided, which are distributed on both sides of the lifting plate mechanism 3, and the packaging bag is transferred from both sides of the bag feeding mechanism 6 to the bag filling position of the bag holding mechanism 7 to be opened, the material grabbing manipulator 5 grabs the plastic bag to the ear punching mechanism 2 for punching, and after the punching is completed, the material grabbing manipulator 5 grabs the plastic bag to the folding mechanism 1, folds it and feeds it to the bag holding mechanism 7 position, the bag feeding mechanism 6 transfers the packaging bag to the predetermined position of the bag holding mechanism 7 to open, and loads the plastic bag into the packaging bag at the bag holding mechanism 7 position, and the lifting plate mechanism 3 seals the packaging bag inside the bag holding mechanism 7 and transfers it to the conveyor belt 4; The lifting plate mechanism 3 is provided with a workbench 31, a flipping mechanism 32, a connecting plate 33, a fixed plate 34, a hydraulic device 35 and a telescope 36. The workbench 31 is arranged inside the fixed plate 34. The workbench 31 is provided with a hydraulic device 35. The side of the connecting plate 33 is connected to the output end of the hydraulic device 35. The electric signal drives the hydraulic device 35 to push the connecting plate 33 to translate, so that the connecting plate 33 drives the flipping mechanism 32 to move to the left. The flipping mechanism 32 is inserted into the lower side of the packaging bag at the position of the bag supporting mechanism 7. When the flipping mechanism 32 rotates and translates, the sealing position of the packaging bag is located directly below the telescope 36. The electric signal drives the telescope 36 to extend and retract. The electric signal drives the hot melt at the lower end of the telescope 36, and the hot melt hot melts the packaging bag to seal it. After the flipping mechanism 32 rotates, it pushes the packaging bag to move to the conveyor belt 4 position for transmission.

[0028] Among them, the flipping mechanism 32 is provided with a slide plate 321, a support plate 322, a rotating rod 323 and a stabilizing plate 324, the stabilizing plate 324 is arranged inside the support plate 322, the rotating rod 323 is fixed to the upper end of the connecting plate 33, and the supporting plate 322 hinges and rotates inside the rotating rod 323, the slide plate 321 is arranged on the side of the supporting plate 322, when the connecting plate 33 translates, the slide plate 321 is inserted into the lower side of the packaging bag, and the electrical signal drives the stabilizing plate 324 to flip to be parallel to the top of the slide plate 321, and the stabilizing plate 324 presses against the open end of the packaging bag.

[0029] In addition, a motor is provided at the outer end of the rotating rod 323 , and an electrical signal drives the motor to flip the supporting plate 322 90 degrees. When the supporting plate 322 is flipped to be horizontal, the stabilizing plate 324 rotates to be horizontal inside the supporting plate 322 .

[0030] In addition, a sealing plate is provided on the surface of the workbench 31 and vertically corresponds to the telescopic device 36. After the turning mechanism 32 is turned over, the sealing position of the packaging bag is located on the sealing plate.

[0031] In addition, the left side of the slide plate 321 is an arc-shaped structure, which facilitates sliding from the bottom of the packaging bag.

[0032] In the present invention, after the plastic bag is processed by the ear punching mechanism 2 and the folding mechanism 1, it is pushed into the position of the bag-stretching mechanism 7 by the material grabbing manipulator 5, and the plastic bag is transported by the bag feeding mechanism 6 to the packaging bag stretched at the position of the bag-stretching mechanism 7 for corresponding bagging. After the bagging is completed, the electric signal drives the hydraulic device 35 to push, and the slide plate 321 is inserted into the lower side of the packaging bag at the position of the bag-stretching mechanism 7, and the stabilizing plate 324 is flipped to the top of the slide plate 321 to press against the opening position of the packaging bag, and then the hydraulic device 35 is driven again to reset and pull out the packaging bag. At this time, the motor drives the rotating rod 323 to rotate the supporting plate 322, so that the packaging bag is between the slide plate 321 and The packaging bag rotates under the clamping of the stabilizing plate 324, and then the opening position of the packaging bag is located on the right side, and the stabilizing plate 324 slowly rotates toward the supporting plate 322 during the rotation of the supporting plate 322, so that when the supporting plate 322 rotates to a horizontal state, the stabilizing plate 324 is hidden in the supporting plate 322, and the packaging bag is flipped to the surface of the supporting plate 322. At this time, the sealing position of the packaging bag is on the sealing plate on the surface of the workbench 31, and the electrical signal drives the telescopic device 36 to perform hot-melt sealing on the packaging bag on the sealing plate. In the present invention, the plastic bag is prevented from falling out of the packaging bag by flipping the packaging bag, and the folding of the packaging bag caused by the grabbing method is prevented.

[0033] Among them, the stabilizing plate 324 is provided with an extrusion bar 41, a hydraulic box 42, a flap 43, a transfer mechanism 44, a connecting rod 45 and a rotating shaft 46. The lower end of the connecting rod 45 is arranged to rotate at the output end of the hydraulic box 42, and the upper end of the connecting rod 45 moves at the right end of the flap 43. The rotating shaft 46 is arranged in the supporting plate 322, and the flap 43 rotates through the rotating shaft 46. The electrical signal drives the output end of the hydraulic box 42 to extend and retract, and pushes the connecting rod 45 to rotate the flap 43, so that the flipping mechanism 32 rotates to the horizontal with the rotating shaft 46 as the center. The extrusion bar 41 presses the packaging bag and the surface of the slide plate 321. A small hydraulic press is arranged inside the flap 43. The electrical signal drives the small hydraulic press to push the transfer mechanism 44, so that the transfer mechanism 44 pushes the packaging bag under the flap 43.

[0034] Furthermore, a hollow groove 3221 is provided in the support plate 322 . When the support plate 322 rotates, the hydraulic box 42 pushes the flap 43 to rotate and allows the flap 43 to enter the position of the hollow groove 3221 .

[0035] Among them, the extrusion strip 41 is provided with a sponge board 411, a roller 412, a plastic board 413 and a force-bearing plate 414. The roller 412 is arranged on the inner side of the plastic board 413 at an angle of 15°. The sponge board 411 is arranged on the lower edge of the force-bearing plate 414. The plastic board 413 is symmetrically arranged at the lower end of the force-bearing plate 414. The force-bearing plate 414 is fixed on the side of the flap 43 to press the packaging bag. The roller 412 at the lower end presses the middle position of the packaging bag. Under the pressing force, the plastic board 413 tends to be horizontal, and the roller 412 gradually spreads to both sides from the middle position of the force-bearing plate 414 to press the packaging bag.

[0036] During the rotation of the support plate 322 in the present invention, the electric signal drives the hydraulic box 42, and the output end of the hydraulic box 42 extends inward, pulling the connecting rod 45 to rotate the flap 43, so that the flap 43 rotates clockwise around the rotating shaft 46 to the inside of the hollow groove 3221. When the support plate 322 is horizontal, the small hydraulic actuator is driven by the electric signal to drive the transfer mechanism 44, so that the packaging bag is pushed and transferred by the transfer mechanism 44 on the surface of the support plate 322 toward the conveyor belt 4. When the flap 43 rotates to the top of the slide plate 321 to press the packaging bag, the extrusion bar 41 presses the opening position of the packaging bag. At this time, the roller 412 starts to press at the middle position of the packaging bag, and the roller 412 gradually spreads to both sides of the middle position of the force plate 414 to press the packaging bag, so that the packaging bag is opened and then closed again, and the packaging bag is gradually pressed from the middle to both sides to avoid uneven opening position and prevent affecting the sealing of the packaging bag.

[0037] Among them, the transfer mechanism 44 is provided with a spring rod 441, a triangular bar 442, a push plate 443, a baffle plate 444 and a bearing plate 445. The spring rod 441 is arranged between the bearing plate 445 and the push plate 443. The baffle plate 444 is fixed inside the flap 43. The bearing plate 445 is arranged on the output end of the small hydraulic press inside the flap 43. When the bearing plate 445 translates, the push plate 443 is driven to move by the spring rod 441, and the baffle plate 444 blocks the expansion of the push plate 443. The push plate 443 moves downward under the elasticity of the spring rod 441, and the triangular bar 442 presses and pushes the packaging bag.

[0038] In addition, one side of the blocking plate 444 is in an arc-shaped state, which has the effect of slidingly cooperating with the upper end of the push plate 443.

[0039] In the present invention, when the load-bearing plate 445 moves with the small hydraulic press, the push plate 443 is stretched downward under the obstruction of the blocking plate 444, and the triangular bar 442 is close to the bottom of the packaging bag, so that the push plate 443 can push the packaging bag when it moves.

[0040] Based on the working method of the automatic packaging equipment for plastic bag production described above, the specific working method is as follows: S1: The plastic bag to be packaged is grabbed by the material grabbing robot 5 to the ear punching mechanism 2, and the unnecessary part is flushed away, and then the plastic bag is continued to be grabbed to the folding mechanism 1. After the folding mechanism 1 faces the plastic bag, the material grabbing robot 5 pushes the plastic bag to the position of the bag-opening mechanism 7, so that the packaging bag delivered by the bag-feeding mechanism 6 is opened at the position of the bag-opening mechanism 7, and the packaging bag opened at the position of the bag-opening mechanism 7 corresponds to the plastic bag pushed by the material grabbing robot 5, and is bagged under the push of the material grabbing robot 5; S2: After bagging is completed, the hydraulic device 35 inside the lifting plate mechanism 3 is driven by an electrical signal to push the connecting plate 33 to move horizontally, so that the flipping mechanism 32 is inserted into the lower side of the packaging bag at the left bag supporting mechanism 7, and the packed packaging bag is moved under the reset of the hydraulic device 35; S3: When the slide plate 321 is inserted into the lower side of the packaging bag, the stabilizing plate 324 is flipped from the support plate 322 to above the slide plate 321, and the stabilizing plate 324 is pressed against the opening of the packaging bag; S4: After the packaging bag is moved, the electric signal drives the motor to pack the rotating rod 323, so that the support plate 322 drives the slide plate 321 to flip. During the flipping process, the stabilizing plate 324 gradually rotates toward the support plate 322. At this time, the packaging bag stays on the surface of the support plate 322 in a horizontal state, so that the sealing position of the packaging bag on the surface of the slide plate 321 is located directly below the telescopic device 36; S5: After the telescopic device 36 is sealed downward, the packaging bag on the surface of the support plate 322 is pushed to the position of the conveyor belt 4 by the transfer mechanism 44 in the stabilizing plate 324 for transfer.

[0041] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. An automatic packaging equipment for plastic bag production, characterized in that: It comprises a folding mechanism (1), an ear punching mechanism (2), a plate lifting mechanism (3), a conveyor belt (4), a material grabbing manipulator (5), a bag feeding mechanism (6) and a bag supporting mechanism (7), wherein two bag feeding mechanisms (6) are provided and are distributed on both sides of the plate lifting mechanism (3); The plate lifting mechanism (3) is provided with a workbench (31), a turning mechanism (32), a connecting plate (33), a fixing plate (34), a hydraulic device (35) and a telescopic device (36); the workbench (31) is arranged inside the fixing plate (34); the hydraulic device (35) is arranged inside the workbench (31); and the side surface of the connecting plate (33) is connected to the output end of the hydraulic device (35); The flip mechanism (32) is provided with a slide plate (321), a support plate (322), a rotating rod (323) and a stabilizing plate (324); the stabilizing plate (324) is arranged inside the support plate (322); the rotating rod (323) is fixed to the upper end of the connecting plate (33); the support plate (322) hinges and rotates inside the rotating rod (323); and the slide plate (321) is arranged on the side of the support plate (322).

2. The automatic packaging equipment for plastic bag production according to claim 1, characterized in that: A motor is provided at the outer end of the rotating rod (323), and an electrical signal drives the motor to flip the supporting plate (322) by 90 degrees. When the supporting plate (322) flips to a horizontal position, the stabilizing plate (324) rotates to a horizontal position within the supporting plate (322).

3. The automatic packaging equipment for plastic bag production according to claim 1, characterized in that: The stabilizing plate (324) is provided with an extrusion bar (41), a hydraulic box (42), a flap (43), a transfer mechanism (44), a connecting rod (45) and a rotating shaft (46); the lower end of the connecting rod (45) is arranged to rotate at the output end of the hydraulic box (42), and the upper end of the connecting rod (45) moves at the right end of the flap (43); the rotating shaft (46) is arranged in the supporting plate (322), and the flap (43) rotates via the rotating shaft (46).

4. The automatic packaging equipment for plastic bag production according to claim 3, characterized in that: The support plate (322) is provided with a hollow groove (3221). When the support plate (322) rotates, the hydraulic box (42) pushes the flap (43) to rotate, and causes the flap (43) to enter the position of the hollow groove (3221).

5. The automatic packaging equipment for plastic bag production according to claim 3, characterized in that: The extrusion strip (41) is provided with a sponge plate (411), a roller (412), a plastic plate (413) and a force-bearing plate (414); the roller (412) is arranged at an angle of 15° on the inner side of the plastic plate (413); the sponge plate (411) is arranged at the lower edge of the force-bearing plate (414); the plastic plate (413) is symmetrically arranged at the lower end of the force-bearing plate (414); the force-bearing plate (414) is fixed to the side of the flap (43) to press against the packaging bag; and the roller (412) at the lower end presses against the middle position of the packaging bag.

6. The automatic packaging equipment for plastic bag production according to claim 3, characterized in that: The transfer mechanism (44) is provided with a spring rod (441), a triangular bar (442), a push plate (443), a blocking plate (444) and a load-bearing plate (445); the spring rod (441) is arranged between the load-bearing plate (445) and the push plate (443); the blocking plate (444) is fixed inside the flap (43); and the load-bearing plate (445) is arranged on the output end of a small hydraulic press inside the flap (43).

7. A working method of an automatic packaging equipment for plastic bag production according to claim 3, characterized in that: The specific working method is as follows: S1: The plastic bag to be packaged is grasped by the material grasping manipulator (5) to the ear punching mechanism (2), and the unnecessary part is flushed away, and then the plastic bag is grasped to the folding mechanism (1). After the folding mechanism (1) faces the plastic bag, the material grasping manipulator (5) pushes the plastic bag to the position of the bag-opening mechanism (7), so that the packaging bag delivered by the bag-feeding mechanism (6) is opened at the position of the bag-opening mechanism (7), and the packaging bag opened at the position of the bag-opening mechanism (7) corresponds to the plastic bag pushed by the material grasping manipulator (5), and is bagged under the push of the material grasping manipulator (5); S2: After bagging is completed, the hydraulic device (35) inside the lifting plate mechanism (3) is driven by an electrical signal to push the connecting plate (33) to move horizontally, so that the flipping mechanism (32) is inserted into the lower side of the packaging bag at the left bag supporting mechanism (7), and the bagged packaging bag is moved under the reset of the hydraulic device (35); S3: when the slide plate (321) is inserted into the lower side of the packaging bag, the stabilizing plate (324) flips from the support plate (322) to above the slide plate (321), and the stabilizing plate (324) is pressed against the opening of the packaging bag; S4: After the packaging bag is moved, the electric signal drives the motor to bag the rotating rod (323), so that the support plate (322) drives the slide plate (321) to flip. During the flipping process, the stabilizing plate (324) gradually rotates in the direction of the support plate (322). At this time, the packaging bag stays on the surface of the support plate (322) in a horizontal state, so that the sealing position of the packaging bag on the surface of the slide plate (321) is located directly below the telescopic device (36); S5: After the retractor (36) is sealed downward, the packaging bag on the surface of the support plate (322) is pushed to the position of the conveyor belt (4) through the transfer mechanism (44) in the stabilizing plate (324).

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