Automatic mulching film packaging system

Abstract

The invention provides an automatic mulching film packaging system, and mainly relates to the field of mulching film packaging. An automatic mulching film packaging system comprises a material transferring structure, an AGV transfer trolley, a discharging structure and a packaging machine which are sequentially arranged, a carrying frame is arranged at the top of a trolley body, a plurality of carrying plates are obliquely arranged in the carrying frame from top to bottom, a front lifting system is arranged on the front side of the carrying frame, and a liftable oblique front flow guide plate is arranged on the front lifting system; the rear side of the carrying frame is provided with a rear lifting system, the rear lifting system is provided with a liftable inclined rear flow guide plate, the unloading structure comprises an inclined stock bin, and after the unloading baffle releases the mulching film, the mulching film rolls to a conveying belt of the packaging machine to be packaged. The automatic mulching film packaging machine has the beneficial effects that smooth butt joint of the mulching film winding procedure and the packaging procedure can be achieved, automatic packaging of mulching films according to specifications is achieved, cost is reduced, and efficiency is improved.

Description

Technical Field

[0001] The present invention mainly relates to the field of plastic film packaging, and specifically, it is an automatic plastic film packaging system. Background Art

[0002] The mixing, extrusion molding, cooling and solidification, traction stretching, and winding processes of agricultural plastic films have all been automated nowadays. However, after the plastic film is wound and taken off the production line, film sealing is still required to complete the final packaging of the plastic film. Currently, the packaging of plastic films mostly relies on manual labor, and the packaging of plastic films is completed by manual heat sealing. However, in the previous automated processing of plastic films, the processing efficiency is very high. For conventional-sized plastic films, usually one roll can be taken off the production line in just a few minutes, and the weight of the plastic film is relatively large. As a result, the packaging of plastic films has become a labor-intensive process, consuming a great deal of human resources.

[0003] Currently, there are also automatic bagging devices to achieve the packaging of plastic films. However, for plastic films of multiple specifications, the bag-changing time is relatively long, and continuous packaging operations for plastic films cannot be carried out. Overall, the packaging cost is not cost-effective compared with manual packaging.

[0004] Moreover, the current packaging equipment cannot achieve the continuity between the plastic film winding process and the packaging process. There is no strict standard for the production specifications of plastic films, and most of them are produced according to the required width and total length of customers, which results in a variety of complex packaging sizes for plastic films. When enterprises produce plastic films, usually multiple production lines start simultaneously, and plastic films of multiple specifications are produced at the same time. This easily leads to the inability to take into account the packaging due to the simultaneous production of multiple rolls of plastic films of different specifications, causing some specifications of plastic films to accumulate and unable to ensure the smooth and continuous production of plastic films. Summary of the Invention

[0005] To solve the deficiencies of the prior art, the present invention provides an automatic plastic film packaging system, which can achieve a smooth connection between the plastic film winding process and the packaging process, realize the automatic packaging of plastic films according to specifications, and reduce costs and increase efficiency.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An automated packaging system for ground film includes a material transfer structure, an AGV transfer vehicle, a discharge structure, and a packaging machine, which are sequentially arranged. The material transfer structure is connected to the end of the ground film production line, and the ground film that has been wound into a roll is temporarily stored at the material transfer structure waiting for transfer. The AGV transfer vehicle is used to connect the ground film production line and the packaging machine as a connection between the two processes. The AGV transfer vehicle is wirelessly controlled by a terminal controller. The AGV transfer vehicle travels back and forth between multiple material transfer structures and discharge structures according to a set route according to a set program, and transfers ground films of different specifications to the discharge structure according to their diameters, and distributes them to packaging machines of corresponding specifications for packaging according to the specifications. This system has strong coherence and can realize the automated full-process operation of ground film from production to packaging. It has high packaging efficiency, high degree of automation, and low cost, and can meet the needs of automated packaging according to specifications in the production of ground films of multiple specifications.

[0007] The material transfer structure is used to transfer the wound ground film to the AGV transfer vehicle for transportation. The AGV transfer vehicle includes a vehicle body, a carrier frame is provided on the top of the vehicle body, a plurality of carrier plates are arranged in an inclined manner from top to bottom in the carrier frame, and a liftable carrier baffle is provided on the rear side of the carrier plate. The carrier plate is used as a station for storing ground films, and is used to carry ground films of different specifications, so as to facilitate the classification and transportation of ground films according to diameter specifications.

[0008] A front lifting system is arranged at the front side of the carrier frame, and a front guide plate which is inclined and can be lifted is provided on the front lifting system, and a front baffle which can be lifted is provided at the rear side of the front guide plate, and a rear lifting system is arranged at the rear side of the carrier frame, and a rear guide plate which is inclined and can be lifted is provided on the rear lifting system, and a rear baffle which can be lifted is provided at the rear side of the rear guide plate. The front guide plate cooperates with the rear guide plate to serve as a receiving and exporting structure for the ground film. Driven by the lifting system, the front guide plate and the rear guide plate can be smoothly docked with the carrier plate which serves as the ground film storage station, thereby completing the storage and exporting of the ground film.

[0009] The unloading structure comprises an inclined silo, a unloading baffle is arranged at the bottom of the silo, and the silo corresponds to the packaging machine. When the unloading baffle releases the ground film, the ground film rolls onto the conveyor belt of the packaging machine for packaging.

[0010] Preferably, the material transfer structure includes an inclined loading platform. A material transfer flap is hinged at the end of the loading platform. A turning cylinder is hinged between the bottom of the material transfer flap and the support of the loading platform. When the turning cylinder is in a contracted state, the material transfer flap is in a horizontal state and the height of the material transfer flap is the same as the height of the end of the loading platform. A liftable first baffle is provided at the end of the loading platform, and a liftable second baffle is provided at the end of the material transfer flap. Through the structure of turning and discharging, the plastic film can be stably transferred to the front deflector of the AGV transfer vehicle. The overall structure of this material transfer structure is simple and reliable in operation, and can perfectly execute the transfer action of the plastic film.

[0011] Preferably, a liftable third baffle is provided on the front side of the first baffle, and the distance between the third baffle and the first baffle is adapted to the diameter of the plastic film. Through this kind of alternate release structure, it can be ensured that when the number of plastic films is large and exceeds the load limit of the AGV transfer vehicle, the excess plastic films can be accurately intercepted to ensure the smooth operation of the AGV transfer vehicle.

[0012] Preferably, the installation positions of the third baffle and / or the first baffle are adjustable, so that the distance between the third baffle and the first baffle is adjustable. Through this kind of structure design with adjustable spacing, it can be adjusted according to the diameter of the plastic film being produced on the production line, so that it can meet the requirements of alternate release of plastic films with different diameters.

[0013] Preferably, the discharging structure corresponds to the packaging machine one by one, and the bottom outlet of the silo is at a distance of one plastic film diameter from the conveyor belt of the packaging machine.

[0014] Preferably, the discharging structure corresponds to multiple packaging machines. The multiple packaging machines are arranged in an array, and the starting points of the multiple packaging machines are the same. The discharging structure is located on the side of the outermost packaging machine. A positioning table is provided below the discharging structure, which is used to position the plastic film released from the silo for waiting to be grabbed. A material distribution mechanism is provided above the packaging machine, which is used to grab the plastic film on the positioning table and transfer it to the corresponding packaging machine according to the specifications. By adding a material distribution mechanism to further sort plastic films of different specifications, the task of targeted packaging of plastic films according to specifications can be completed. The material distribution mechanism and the packaging machine run synchronously, which can reduce the travel distance of the AGV transfer vehicle to a certain extent and improve the transfer efficiency.

[0015] Preferably, the material distributing mechanism comprises a truss arranged above the packaging machine, a horizontal slide rail perpendicular to the arrangement direction of the packaging machine and a material distributing driving mechanism are arranged on the truss, a material distributing seat is slidably arranged on the horizontal slide rail, a lifting frame is arranged at the bottom of the material distributing seat, a material distributing slide rail is arranged at the bottom of the lifting frame, a left material distributing screw and a right material distributing screw are arranged on both sides of the material distributing slide rail, and a left material distributing fixture adapted to the left material distributing screw and a right material distributing fixture adapted to the right material distributing screw are slidably arranged at both ends of the material distributing slide rail. Through the structure of the truss manipulator, the ground film can be stably grasped and sorted, so that ground films of different specifications can complete their respective packaging tasks.

[0016] Preferably, the left material dividing clamp and the right material dividing clamp are coaxially arranged column structures, and when the left material dividing clamp and the right material dividing clamp move toward each other, the column is inserted into the ground film reel to complete the grabbing of the ground film.

[0017] Preferably, the left material dividing clamp and the right material dividing clamp both comprise a clamping cylinder and two symmetrically arranged clamping jaws, and the inner sides of the two clamping jaws are both provided with a long groove whose width is greater than the diameter of the ground film roll.

[0018] The above two gripping structures can both realize the gripping of the ground film roll, and can adapt to the gripping position error caused by the change of the ground film diameter within a certain range.

[0019] Preferably, the positioning platform is tilted, a positioning block is provided at the end of the positioning platform, the bottom outlet of the silo is located at the front end of the positioning platform, the positioning block blocks the ground film so that the ground film is arranged in a row on the positioning platform, and the ground film blocked by the positioning block is the ground film to be grabbed.

[0020] Compared with the prior art, the beneficial effects of the present invention are: The present invention realizes the connection between the mulch film production process and the packaging process through the transfer of the AGV transfer vehicle, and completes the automatic transfer process after the mulch film is offline. Through the docking of the material transfer structure and the unloading structure with the AGV transfer vehicle, the problem of high labor intensity and low efficiency of manual handling in the mulch film transfer process is solved, the last link of mulch film production that requires manual labor is opened up, and the fully automated operation of mulch film production is realized.

[0021] The AGV transfer vehicle of the present invention acts as a ground film transfer station through the stacked carrier plates, so that the ground film can be transferred according to specifications. When the workshop produces ground films of multiple specifications simultaneously, the transportation and packaging of the ground films can still be taken into account without causing material accumulation. The assembly line operation of ground film production can be realized, and the fluency and production efficiency of the production process can be improved.

[0022] The film mulching machine of the present invention uses a heat sealing method for packaging. By controlling the heat sealing temperature, relatively tight packaging can be carried out without damaging the film mulching, greatly improving the packaging efficiency of the film mulching and reducing the labor intensity of manual packaging.

[0023] The packaging machine of the present invention is set according to specifications and packages the film mulching of corresponding specifications respectively. The packaging process is smooth, and the film mulching is distributed through an AGV transfer vehicle or a material distribution device. The overall process has a high degree of automation and informatization. Brief Description of the Drawings

[0024] Attached Figure 1 is a schematic structural diagram of Embodiment 2 of the present invention; Attached Figure 2 is a schematic structural diagram of Embodiment 3 of the present invention; Attached Figure 3 is a schematic structural diagram of the AGV transfer vehicle of the present invention; Attached Figure 4 is a schematic cross-sectional structural diagram of the AGV transfer vehicle of the present invention; Attached Figure 5 is a schematic diagram of the cooperation between the AGV transfer vehicle and the material transfer structure of the present invention; Attached Figure 6 is a schematic diagram of the cooperation between the AGV transfer vehicle and the unloading structure of the present invention; Attached Figure 7 is a schematic structural diagram of the material distribution mechanism of the present invention; Attached Figure 8 is a schematic structural diagram of the material distribution fixture of the present invention; Attached Figure 9 is of the present invention Figure 2 partial enlarged structural schematic diagram of part A.

[0025] Reference numerals shown in the drawings: 1, material transfer structure; 2, AGV transfer vehicle; 3, front lifting system; 4, rear lifting system; 5, unloading structure; 6, packaging machine; 7, material distribution mechanism; 8, material distribution seat; 11, carrying platform; 12, material transfer flap; 13, flipping cylinder; 14, first baffle; 15, second baffle; 16, third baffle; 21, carrying frame; 22, carrying plate; 23, carrying baffle; 31, front diversion plate; 32, front baffle; 33, front lifting track; 34, front lifting mechanism; 41, rear diversion plate; 42, rear baffle; 43, rear lifting track; 44, rear lifting mechanism; 51, silo; 52, unloading baffle; 53, positioning table; 54, positioning block; 71, truss; 72, horizontal sliding rail; 73, material distribution driving mechanism; 81, lifting frame; 82, material distribution sliding rail; 83, left material distribution lead screw; 84, left material distribution fixture; 85, right material distribution lead screw; 86, right material distribution fixture; 87, clamping cylinder; 88, long slot. Detailed Description of the Invention

[0026] Combined with the attached Figures 1-9 and specific embodiments, the present invention will be further described. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application. Embodiment 1

[0027] As shown in the figure, the present invention provides an automatic plastic film packaging system. This system is connected after the plastic film winding equipment and is used to receive and transfer the wound plastic film and package it through the packaging equipment. The transfer device of the plastic film uses an AGV transfer vehicle 2. There are multiple workstations on the AGV transfer vehicle 2 as storage positions for plastic films of different diameter specifications, which can meet the packaging and transfer requirements when plastic films of different specifications are produced synchronously.

[0028] Specifically, this system mainly includes the following parts: The material transfer structure 1; used to transfer the plastic film that has been wound and placed on the receiving platform to the AGV transfer vehicle.

[0029] The AGV transfer vehicle 2; used to receive the plastic film, classify and store plastic films of different specifications, and at the same time complete the transfer of the plastic film from the winding equipment to the packaging equipment.

[0030] The unloading structure 5; used to transfer the plastic film from the AGV transfer vehicle 2 to the packaging equipment and wait for the packaging by the packaging equipment.

[0031] The packaging machine 6; used to perform film covering packaging on plastic films of the same specification, and through the heat shrinkage process, the packaging film can completely cover the plastic film. At the same time, the temperature is strictly controlled to ensure that while realizing the film covering packaging of the plastic film, the plastic film itself is not damaged.

[0032] The material transfer structure: As the first step of this system, the material transfer structure 1 can adopt a flap device or a material taking manipulator. Among them, the flap device has a simple structure and low cost. The present invention preferably uses the flap device to transfer the plastic film. Specifically, the flap device includes an inclined loading platform 11. A first baffle 14 driven by a cylinder is arranged at the end of the loading platform 11. The first baffle 14 is used to limit and block the wound plastic film. Lifting cylinders are symmetrically installed at both ends of the first baffle 14. When the lifting cylinders drive the first baffle 14 to rise, the plastic film can continue to slide downstream on the inclined loading platform 11. A transfer flap 12 is installed downstream of the loading platform 11. The downstream of the transfer flap 12 is hinged to the frame body. The bottom of the transfer flap 12 is hinged to the frame body through a cylinder or a hydraulic cylinder. The cylinder or the hydraulic cylinder serves as a turning cylinder 13 to drive the transfer flap 12. When the turning cylinder 13 is in a contracted state, the transfer flap 12 presents a horizontal state, and the front side of the transfer flap 12 is at the same height as the end of the loading platform 11. When the turning cylinder 13 is in an extended state, the transfer flap 12 is in an inclined state, and the plastic film falls on the inclined transfer flap 12 and falls onto the AGV transfer vehicle 2 for loading.

[0033] Furthermore, in order to prevent the plastic film on the transfer flap 12 from rolling onto the ground after falling from the loading platform 11, a second baffle 15 is installed at the end of the transfer flap 12 in this embodiment. The second baffle 15 is also driven by a cylinder. When the cylinders on both sides extend, the second baffle 15 can be extended to block the plastic film. After the cylinders on both sides contract, the second baffle 15 slides below the transfer flap 12 to release the plastic film.

[0034] AGV transfer vehicle: As a loading and transfer mechanism for the plastic film, in order to meet the needs of different specifications of plastic film production, multiple workstations are provided on the AGV transfer vehicle 2 in this embodiment to place plastic films with different diameters. The AGV transfer vehicle 2 includes a vehicle body. The vehicle body is a self-powered vehicle body, which uses its own battery as a power source and is driven by a motor to maintain operation. The top of the AGV transfer vehicle 2 has a carrying frame 21. The carrying frame 21 has multiple layers of carrying plates 22. The carrying plates 22 present an inclined state with the front end high and the rear end low. In this embodiment, three carrying plates 22 are evenly arranged on the carrying frame 21 from top to bottom. The three carrying plates 22 can classify and carry plastic films of three diameter specifications respectively.

[0035] A front lifting system 3 is arranged on the front side of the AGV transfer vehicle 2, and a rear lifting system 4 is arranged on the rear side of the AGV transfer vehicle 2.

[0036] The carrier plate 22 is used to carry plastic films of the same diameter specification. A carrier baffle 23 is installed at the rear side of the carrier plate 22. Both ends of the carrier baffle 23 are driven by a carrier slide cylinder. The carrier baffle 23 is driven to lift and lower by the carrier slide cylinder. When the carrier slide cylinder extends, the carrier baffle 23 extends above the carrier plate 22 to store the plastic films placed on the carrier plate 22. When the carrier slide cylinder contracts, the carrier baffle 23 descends below the carrier plate 22, exposing the carrier plate 22, so that the plastic films on the carrier plate 22 can roll onto the rear deflector 41.

[0037] The front lifting system 3 includes front lifting tracks 33 symmetrically arranged on the front two sides of the carrier frame 21. A front lifting mechanism 34 is arranged outside the front lifting tracks 33. A front deflector 31 is slidably arranged on the two sides of the front lifting tracks 33. The front deflector 31 is in an inclined state with the front end higher than the rear end. A front baffle 32 is arranged at the rear side of the front deflector 31. Both sides of the front baffle 32 are driven by a front slide cylinder. When the front slide cylinder is in the extended state, the front baffle 32 is lifted to block the plastic films on the front deflector 31. When the front slide cylinder is in the contracted state, the front baffle 32 is lowered, and the top of the front baffle 32 is at the same height as the rear side of the front deflector 31 to release the plastic films onto the corresponding carrier plate 22 for carrying. The front deflector 31 is docked with carrier plates 22 of different heights and is used to guide plastic films of different specifications to different carrier plate 22 workstations for storage. When it is necessary to guide the plastic films to the corresponding carrier plate 22 through the front deflector 31, driven by the front lifting mechanism 34, the rear side of the front deflector 31 can just correspond to the front height of the carrier plate 22 that needs to carry the plastic films, so that the plastic films roll onto the carrier plate 22 under the action of gravity for carrying.

[0038] The rear lifting system 4 includes rear lifting tracks 43 symmetrically arranged on the rear sides of both sides of the carrier 21. A rear lifting mechanism 44 is arranged outside the rear lifting tracks 43. A rear deflector 41 is slidably arranged on the rear lifting tracks 43 on both sides. The rear deflector 41 is in an inclined state with the front high and the rear low. A rear baffle 42 is arranged at the rear side of the rear deflector 41. Both sides of the rear baffle 42 are driven by rear slide table cylinders. When the rear slide table cylinders are in the extended state, the rear baffle 42 is raised to block the plastic film on the rear deflector 41. When the rear slide table cylinders are in the retracted state, the rear baffle 42 is lowered, and the top of the rear baffle 42 is at the same height as the rear side of the rear deflector 41, releasing the plastic film onto the unloading structure 5 for temporary storage. The rear deflector 41 is docked with the carrier plates 22 at different heights, and is used to transfer the plastic film at different loading stations to the corresponding unloading structure 5 for temporary storage. When it is necessary to export the plastic film on the carrier plate 22, the rear deflector 41 is driven to lift and lower by the rear lifting mechanism 44, so that the front side of the rear deflector 41 corresponds to the height of the rear side of the carrier plate 22 from which the plastic film needs to be exported, so that the plastic film rolls onto the unloading structure 5 for temporary storage under the action of gravity.

[0039] The front lifting mechanism 34 and the rear lifting mechanism 44 have the same structure, both of which are synchronous belt or synchronous chain mechanisms symmetrically arranged on both sides of the carrier 21. The belt pulleys or sprockets at their tops are driving wheels, and the driving wheels on both sides are coaxially installed through a driving shaft in the middle. The middle part of the driving shaft is driven by a driving motor.

[0040] Unloading structure: The unloading structure 5 is an inclined silo 51 with a width slightly larger than the diameter of the plastic film, so that after the plastic film is released into the unloading structure 5, the plastic films are stacked inside. In this embodiment, one unloading structure 5 corresponds to one packaging machine 6. The unloading structure 5 is installed on one side of the corresponding packaging machine 6. A discharge baffle 52 is installed at the bottom of the unloading structure 5, and the discharge baffle 52 is installed at the bottom of the silo 51. The discharge baffle 52 is driven by discharge slide table cylinders on both sides. When the discharge slide table cylinders drive the discharge baffle 52 to contract, the bottom opening of the silo 51 is opened, so that the plastic film can fall onto the conveyor belt of the packaging machine 6. The height of the bottom opening of the silo 51 from the conveyor belt is slightly larger than the diameter of the plastic film. After releasing one plastic film, the subsequent plastic films are driven by the extended action of the slide table cylinders to drive the discharge baffle 52 to squeeze and limit the plastic films. Only when the previous plastic film enters the packaging process and vacates the release space below, the discharge slide table cylinders will drive the discharge baffle 52 to contract to release the next plastic film.

[0041] Packaging machine: The packaging machine 6 uses a pillow-type packaging machine 6. Two rows of soft limit heads are arranged in an array on the conveyor belt of the packaging machine 6, and the plastic film is restricted by the two rows of limit heads, thereby ensuring the stability of the plastic film during the packaging process. In the present invention, the heat-sealing temperature of the packaging machine 6 is adjusted to 120 ± 5 degrees, which can ensure the heat-sealing of the packaging film without damaging the outer layer of the plastic film.

[0042] When the conventional agricultural plastic film is wound into a roll, it usually takes several minutes, while the packaging of the plastic film can be completed in only a few seconds. Thanks to the self-identification function of the packaging machine 6, the packaging machine 6 can start and stop at any time, promptly handle the transported plastic film, and quickly package the plastic film. Although the packaging speed of the packaging machine 6 is relatively fast, the width of the packaging consumables (heat-sealing film) is fixed. Plastic films of different diameter specifications require corresponding widths of heat-sealing films, and the replacement of the heat-sealing film takes a long time. Therefore, a packaging method of using one packaging machine 6 for one specification of plastic film is adopted. The price of the pillow-type packaging machine 6 is not expensive and is completely within the affordable range.

[0043] When using the AGV transfer vehicle 2 to transfer the plastic film, the process is as follows: After the plastic film is wound, the plastic film is grabbed by the manipulator and transferred to the carrier table 11. At this time, the plastic film winding production line sends a signal to the master controller. After receiving the signal of the plastic film winding device of this specification, the master controller controls the AGV transfer vehicle 2 to move to the carrier table 11. At the same time, the second baffle 15 rises to release the plastic film to the transfer flap 12. When the AGV transfer vehicle 2 is docked with the transfer flap 12, the front guide plate 31 on the AGV transfer vehicle 2 rises to the same height as the transfer flap 12. Then the second baffle 15 rises to release the plastic film onto the front guide plate 31. The front guide plate 31 descends to the corresponding carrier plate 22 position according to the specification of the plastic film. Then the front baffle 32 descends to release the plastic film onto the corresponding carrier plate 22 for storage. The AGV transfer vehicle 2 can transport multiple specifications of plastic films multiple times each time. When at least one of the carrier plates 22 is full, the AGV transfer vehicle 2 drives the plastic film to move to the unloading structure 5 of the packaging machine 6 for temporary storage.

[0044] According to needs, the AGV transfer vehicle 2 can adopt a multi-vehicle cooperation method. The master controller controls multiple AGV transfer vehicles 2 to classify and transfer plastic films of different specifications to meet the requirements of synchronous production of multiple specifications of plastic films in a large workshop.

[0045] Among them, the specifications of the plastic film mulch are only divided according to the diameter of the plastic film mulch, and the length of the plastic film mulch is not considered. Because when packaging, the length of the plastic film mulch can be automatically cut by the self-identification function of the packaging machine 6 to adapt to the packaging of the plastic film mulch. At the same time, when dividing the specifications of the plastic film mulch, the plastic film mulch within the same diameter range belongs to the same specification. For example, the plastic film mulch with a diameter within 10 - 12 cm is of the same specification. When heat-sealing the plastic film mulch, the heat-sealing temperature of the large-diameter plastic film mulch of the same specification is at the lower limit of the set temperature, and the heat-sealing temperature of the small-diameter plastic film mulch is at the upper limit of the set temperature. Thus, the heat shrinkage amount of the packaging film is controlled by temperature, and on the premise of ensuring good packaging of the plastic film mulch, damage to the plastic film mulch is minimized as much as possible.

[0046] In addition, according to our experiments, even when heat-sealing the plastic film for packaging the plastic film mulch at a relatively high heat-sealing temperature (150 °C), only the first three layers of the plastic film mulch can be damaged after unpacking. Therefore, by using the pillow-type packaging machine 6 for heat-sealing, heat-sealing packaging of the plastic film mulch can be achieved under reasonable control of the heat-sealing temperature. Embodiment 2

[0047] Based on Embodiment 1, when the efficiency of the plastic film mulch winding device is faster than the transfer efficiency, there will be more plastic film mulch on the carrier table 11. At this time, if the AGV transfer vehicle 2 cannot transfer all the plastic film mulch at one time, a third baffle 16 can be added to the carrier table 11. The third baffle 16 is installed on the front side of the first baffle 14, and the structure of the third baffle 16 is the same as that of the first baffle 14. The distance between the third baffle 16 and the first baffle 14 is slightly larger than the diameter of the plastic film mulch, so that the plastic film mulch can be released sequentially by the alternating opening and closing of the first baffle 14 and the second baffle 15.

[0048] Furthermore, in order to adapt to the production of plastic film mulch of different specifications, the installation positions of the third baffle 16 and / or the first baffle 14 are adjustable. Specifically, the cylinder mounting brackets on both sides of the third baffle 16 and / or the first baffle 14 are fixed by bolts, and the carrier table 11 has long holes, so that the cylinder installation positions on both sides of the third baffle 16 and / or the first baffle 14 are adjustable, and then the distance between the first baffle 14 and the second baffle 15 is adjusted to adapt to the transfer of plastic film mulch of different diameters. Embodiment 3

[0049] Based on Embodiment 1 or Embodiment 2, in this embodiment, one unloading structure 5 corresponds to multiple packaging machines 6. This corresponding method can make the unloading position of the AGV transfer vehicle 2 relatively fixed, and at the same time save the layout space, so that the packaging machines 6 can be arranged side by side, making the overall layout more compact and regular.

[0050] Specifically, a positioning table 53 is provided below the unloading structure 5 in this embodiment. A positioning block 54 is provided on the positioning table 53 for limiting the plastic film. The bottom outlet of the silo 51 is located at the front end of the positioning table 53. By blocking the plastic film with the positioning block 54, the plastic film can be arranged in an orderly manner on the positioning table 53. When the unloading baffle 52 at the bottom of the unloading structure 5 is opened, the plastic film rolls onto the positioning table 53 for array setting. A material distributing mechanism 7 is provided above multiple packaging machines 6. The material distributing mechanism 7 is used to transfer the plastic film to the corresponding packaging machine 6 according to specifications for packaging.

[0051] The material distributing mechanism 7 includes a truss 71 spanning above the packaging machine 6. A horizontal slide rail 72 perpendicular to the arrangement direction of the packaging machine 6 and a material distributing drive mechanism 73 are provided on the truss 71. In this embodiment, the horizontal slide rail 72 is divided into two pairs, and the two pairs of horizontal slide rails 72 are arranged on both sides. A material distributing seat 8 is slidably installed between the two pairs of horizontal slide rails 72. The material distributing drive mechanism 73 is driven by a synchronous belt, a driving lead screw or a gear-rack mechanism, and the material distributing drive mechanism 73 is installed between a pair of horizontal slide rails 72 on each side. The material distributing drive mechanism 73 is used to drive the material distributing seat 8 to slide stably back and forth along the horizontal slide rail 72. Specifically, in this embodiment, the material distributing drive mechanism 73 adopts a gear-rack mechanism. In a pair of horizontal slide rails 72 on the same side in this embodiment, a rack is provided inside one of the horizontal slide rails 72, and a driving motor is provided on the material distributing seat 8. The driving motor realizes the reciprocating sliding of the material distributing seat 8 through the meshing of the driving gear and the rack.

[0052] An elevating frame 81 is installed on the material distributing seat 8. The elevating frame 81 is driven to lift by a gear-rack mechanism driven by a motor. A material distributing slide rail 82 is installed at the bottom of the elevating frame 81. The material distributing slide rail 82 is parallel to the arrangement direction of the packaging machine 6. A left material distributing lead screw 83 and a right material distributing lead screw 85 are respectively installed on both sides of the material distributing slide rail 82. A left material distributing clamp 84 and a right material distributing clamp 86 are respectively slidably installed on the left and right sides of the material distributing slide rail 82. The left material distributing clamp 84 is driven by the left material distributing lead screw 83, and the right material distributing clamp 86 is driven by the right material distributing lead screw 85. Both the left material distributing lead screw 83 and the right material distributing lead screw 85 are driven by servo motors. By driving the left material distributing clamp 84 and the right material distributing clamp 86 separately, plastic films of different lengths can be grabbed. During the transportation of the plastic film, it is very likely that the plastic film is not symmetrically arranged with the material distributing seat 8 as the center. In order to avoid the limited operation of the material distributing seat 8 due to the unbalance, the width between the two pairs of horizontal slide rails 72 in this embodiment is kept above 1 meter, so as to improve the bearing capacity of the material distributing seat 8 by increasing the span.

[0053] In this embodiment, the left material separation fixture 84 and the right material separation fixture 86 can adopt an insertion-type fixture or a clamping-type fixture. The insertion-type fixture is a cylinder with a diameter smaller than the inner hole of the plastic film reel. Through the opposite movement of the left material separation lead screw 83 and the right material separation lead screw 85, the two cylinders can be inserted into the inner holes at both ends of the plastic film reel, so as to realize the grasping of the plastic film. When releasing the plastic film, the left material separation fixture 84 and the right material separation fixture 86 move quickly in opposite directions to realize the release of the plastic film. Further, in order to realize the stable clamping of the plastic film by the left material separation fixture 84 and the right material separation fixture 86, sensors are installed at the roots of the cylindrical left material separation fixture 84 and the right material separation fixture 86. When the sensors at the roots touch the plastic film reel, they will be triggered, which proves that the material separation fixture on this side is in place.

[0054] The insertion-type fixture is convenient for grasping the plastic film. However, when grasping plastic films of different specifications, the positioning is likely to be inaccurate. Therefore, when the specification span of the plastic film is large, a more complex clamping-type fixture is adopted. The clamping-type fixture is driven by a clamping cylinder 87. Through the clamping cylinder 87, the two jaws move towards or away from each other, so as to realize the grasping and release of the plastic film. The inner side of the jaw has a long groove 88. When the two jaws are butted, a closed space with a semi-circular top and bottom and a rectangular middle is formed, and the width of this closed space is greater than the diameter of the plastic film reel. This structure can adapt to plastic films of different specifications, offset the differences in grasping height and grasping position caused by different plastic film diameters, and is convenient for grasping the plastic film.

[0055] Further, in order to be able to position the grasping position when grasping the plastic film, a positioner is added outside the left material separation fixture 84 and outside the right material separation fixture 86. When grasping the plastic film, the left material separation fixture 84 is driven by the left material separation lead screw 83 to move towards the plastic film, and the right material separation fixture 86 is driven by the right material separation lead screw 85 to move towards the plastic film. The positioner will first touch the end of the plastic film. At this time, the material separation fixture on this side reaches the material grasping position, that is, the positioning operation of the material separation fixture for grasping the plastic film is completed.

[0056] Through the material separation mechanism 7, the plastic film is transferred to the corresponding packaging machine 6 according to its own specifications, and the final packaging operation of the plastic film is completed by the packaging machine 6. After the plastic film is packaged, there is a palletizing manipulator at the end of the packaging machine 6 to grasp the packaged plastic film and palletize it according to the specifications onto the pallet, realizing the automation of the entire plastic film packaging process.

Claims

1. An automatic plastic film packaging system, comprising a material transfer structure (1), an AGV transfer vehicle (2), a discharging structure (5), and a packaging machine (6) arranged in sequence, characterized in that: The material transfer structure (1) is used to transfer the wound plastic film onto the AGV transfer vehicle (2) for transportation. The AGV transfer vehicle includes a vehicle body, and a carrying rack (21) is provided at the top of the vehicle body. A plurality of carrying plates (22) are inclinedly arranged from top to bottom within the carrying rack (21). A liftable carrying baffle (23) is provided at the rear side of the carrying plate (22). A front lift system (3) is provided at the front side of the carrying rack (21). An inclined front guide plate (31) that can be lifted is provided on the front lift system (3). A front baffle (32) that can be lifted is provided at the rear side of the front guide plate (31). A rear lift system (4) is provided at the rear side of the carrying rack (21). An inclined rear guide plate (41) that can be lifted is provided on the rear lift system (4). A rear baffle (42) that can be lifted is provided at the rear side of the rear guide plate (41). The unloading structure (5) includes an inclined silo (51). A discharge baffle (52) is provided at the bottom of the silo (51). The silo (51) corresponds to the packaging machine (6). When the discharge baffle (52) releases the plastic film, the plastic film rolls onto the conveyor belt of the packaging machine (6) for packaging.

2. The automatic plastic film packaging system according to claim 1, wherein: The material transfer structure (1) includes an inclined carrying platform (11). A transfer flap (12) is hinged at the end of the carrying platform (11). A turning cylinder (13) is hinged between the bottom of the transfer flap (12) and the bracket of the carrying platform (11). When the turning cylinder (13) is in a contracted state, the transfer flap (12) is in a horizontal state and the height of the transfer flap (12) is the same as the height of the end of the carrying platform (11). A liftable first baffle (14) is provided at the end of the carrying platform (11). A liftable second baffle (15) is provided at the end of the transfer flap (12).

3. The automatic film mulch packaging system according to claim 2, characterized in that: A liftable third baffle (16) is provided at the front side of the first baffle (14). The distance between the third baffle (16) and the first baffle (14) is adapted to the diameter of the plastic film.

4. An automatic plastic film packaging system according to claim 3, characterized in that: The installation position of the third baffle (16) and / or the first baffle (14) is adjustable, so that the distance between the third baffle (16) and the first baffle (14) is adjustable.

5. An automatic plastic film packaging system according to claim 1, characterized in that: The unloading structure (5) corresponds to the packaging machine (6) one by one. The bottom outlet of the silo (51) is at a distance of one plastic film diameter from the conveyor belt of the packaging machine (6).

6. The automatic plastic film packaging system according to claim 1, wherein: The unloading structure (5) corresponds to a plurality of packaging machines (6). The plurality of packaging machines (6) are arranged in an array, and the starting points of the plurality of packaging machines (6) are the same. The unloading structure (5) is located on the side of the outermost packaging machine (6). A positioning table (53) is provided below the unloading structure (5). The positioning table (53) is used to position the plastic film released from the silo (51) and wait for grasping. A material distribution mechanism (7) is provided above the packaging machine (6). The material distribution mechanism (7) is used to grasp the plastic film on the positioning table (53) and transfer it to the corresponding packaging machine (6) according to the specifications.

7. The automatic plastic film packaging system according to claim 6, wherein: The material distribution mechanism (7) includes a truss (71) arranged above the packaging machine (6). A horizontal slide rail (72) perpendicular to the arrangement direction of the packaging machine (6) and a material distribution driving mechanism (73) are arranged on the truss (71). A material distribution seat (8) is slidably arranged on the horizontal slide rail (72). A lifting frame (81) is arranged at the bottom of the material distribution seat (8). A material distribution slide rail (82) is arranged at the bottom of the lifting frame (81). A left material distribution lead screw (83) and a right material distribution lead screw (85) are respectively arranged on both sides of the material distribution slide rail (82). A left material distribution clamp (84) adapted to the left material distribution lead screw (83) and a right material distribution clamp (86) adapted to the right material distribution lead screw (85) are respectively slidably arranged at both ends of the material distribution slide rail (82).

8. An automatic plastic film packaging system according to claim 7, characterized in that: The left material distribution clamp (84) and the right material distribution clamp (86) are columnar structures arranged coaxially. When the left material distribution clamp (84) and the right material distribution clamp (86) move towards each other, the columnar body is inserted into the plastic film roll to complete the grasping of the plastic film.

9. An automatic plastic film packaging system according to claim 7, characterized in that: The left material distribution clamp (84) and the right material distribution clamp (86) both include a clamping cylinder (87) and two symmetrically arranged clamping jaws. Long grooves (88) with a width greater than the diameter of the plastic film roll are arranged on the inner sides of the two clamping jaws.

10. A kind of automatic plastic film packaging system according to any one of claims 6-9, characterized in that: The positioning table (53) is inclined. A positioning block (54) is arranged at the end of the positioning table (53). The bottom outlet of the material bin (51) is located at the front end of the positioning table (53). The positioning block (54) blocks the plastic film so that the plastic film is arranged in an orderly manner on the positioning table (53). The plastic film blocked by the positioning block (54) is the plastic film to be grasped.

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