Plastic particle weighing, packaging, stacking and conveying device and method based on FFS technology

Abstract

The invention relates to the technical field of plastic particle processing, in particular to a plastic particle weighing, packaging, stacking and conveying device and method based on an FFS technology. The device comprises a supporting assembly and a stretching assembly, the supporting assembly comprises a sliding rod arranged in a bag making bin in a sliding mode, one side of the sliding rod is externally connected with an air swelling shaft used for fixing a film roll, and the stretching assembly comprises two guide wheels fixed to the inner wall of the bag making bin and a transverse rod fixedly arranged in the bag making bin. And screw rods are symmetrically and rotationally mounted on the sides, close to the guide wheels, of the transverse rods, and a clamping plate is arranged between the two screw rods. One end of a plastic film is clamped through the clamping plate and stretched to the target length, the film is cut off and sealed through the sealing device, bag making is completed, the bag making size can be accurately adjusted according to needs in the bag making process, equipment parameters do not need to be adjusted through shutdown, it is guaranteed that the bag length is proper while the production efficiency of equipment is improved, and the production cost is reduced. And therefore, the problems of uncomfortable bag length, poor sealing or incomplete material filling and the like in the subsequent process are avoided.

Description

Technical Field

[0001] This invention relates to the field of plastic pellet processing technology, and more specifically, to a weighing, packaging, palletizing, and conveying device and method for plastic pellets based on FFS technology. Background Technology

[0002] In finished product packaging production lines for plastic granules (such as polypropylene and polyethylene), FFS (Fulfill-Fill-Sea) technology has become the mainstream process due to its advantages of high efficiency, hygiene, and material savings. Its core process involves automatically forming open bags from rolls of film on-site, followed by filling and sealing. However, when facing the demand for flexible production with diverse varieties and specifications, existing automated packaging lines based on FFS technology still exhibit significant efficiency bottlenecks and operational complexities.

[0003] Specifically, the final packaging dimensions (length, width, and height of the full bag) of plastic granules directly depend on the bulk density of the material. For example, for the same target net weight of 25kg, low-density materials (such as LDPE) require a larger bag volume, while high-density materials (such as certain engineering plastics) require a smaller bag volume. In actual production, a packaging line often needs to process multiple grades or batches of plastic granules with varying bulk densities. According to traditional processes, when switching to package different materials, if the required full bag size changes significantly, the operator must stop the machine and manually adjust the mechanical components of the FFS packaging machine—mainly adjusting the key limit switches or transmission devices in the bag-making mechanism that determine the bag length, and sometimes even replacing the film roll guide components suitable for different widths. This process is not only time-consuming (potentially causing production line downtime of tens of minutes), but also relies on the experience of skilled workers, making it difficult to guarantee adjustment precision. This can easily lead to subsequent problems such as unsuitable bag length, poor sealing, or incomplete material filling. Frequent downtime for adjustments severely restricts continuous production cycle time, reduces overall equipment efficiency, and fails to meet the demands of modern factories for highly flexible, high-capacity, and intelligent production with one-click switching. In view of this, this invention proposes a plastic pellet weighing, packaging, palletizing, and conveying device and method based on FFS technology. Summary of the Invention

[0004] The purpose of this invention is to provide a weighing, packaging, palletizing, and conveying device and method for plastic pellets based on FFS technology, in order to solve the problems mentioned in the background art, such as the need for frequent machine stops to adjust bag size due to different material bulk densities, resulting in low efficiency and cumbersome operation.

[0005] To address the aforementioned problems, one objective of this invention is to provide a plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology, comprising a bag-making chamber and a bag-making assembly disposed within it. The bag-making assembly comprises, from top to bottom, a support assembly, a bag-opening assembly, and a stretching assembly. The support assembly includes a slide rod slidably disposed within the bag-making chamber. An air-expansion shaft for fixing a film roll is externally connected to one side of the slide rod, and the bag-making chamber has an opening at a corresponding position for the film roll to pass through. The stretching assembly includes two guide wheels fixed to the inner wall of the bag-making chamber, and a crossbar fixedly installed inside the bag-making chamber, with the guide wheels located on the upper side of the slide bar. A lead screw is symmetrically and rotatably installed on the side of the crossbar near the guide wheel. A clamp is provided between the two lead screws, and the two lead screws are respectively rotatably inserted into the two ends of the clamp. The packaging bag size can be flexibly adjusted through the coordinated operation of the air shaft, guide wheel, lead screw and clamping plate.

[0006] Guided by the guide wheel, the plastic film is positioned and, with the stable support of the air shaft, the screw drives the clamping plate to precisely stretch the plastic film. The plastic film can be adjusted to the appropriate length as needed. During the bag making process, the bag size can be precisely adjusted as needed without stopping the machine to adjust the equipment parameters. This improves the production efficiency of the equipment and ensures that the bag length is appropriate, thereby avoiding problems such as unsuitable bag length, poor sealing, or insufficient material filling.

[0007] As a further improvement to this technical solution, the slide bar is symmetrically and fixedly provided with support plates for supporting the air expansion shaft on the side near the air expansion shaft, and the two support plates are rotatably connected to the two ends of the air expansion shaft respectively.

[0008] The air shaft is stably supported by a support plate. When the plastic film is stretched, the air shaft rotates with the plastic film on the support plate.

[0009] As a further improvement to this technical solution, vertical rods are symmetrically fixedly arranged on the lower side of the slide rod, and a screw is threadedly connected to the lower side of the vertical rod, and the screw is rotatably arranged inside the bag making chamber. A turbine is fixedly installed on the screw, and a worm gear is threadedly connected to the turbine. A first motor for driving the worm gear to rotate is installed on one side of the worm gear, and the first motor is fixedly installed inside the bag making chamber.

[0010] After the film roll is fixed on the air shaft, the No. 1 motor is started to drive the worm gear to rotate, which in turn drives the turbine and screw to rotate. When the screw rotates, it lifts or pulls the vertical rod up or down and drives the slide rod to adjust the height until the air shaft is adjusted to a suitable height to ensure that it can stably support the film roll in the subsequent bag making process.

[0011] As a further improvement to this technical solution, a sealing device for sealing and cutting the plastic film is provided on one side of the clamping plate. The sealing device is fixedly installed inside the bag making chamber, and the clamping plate can pass through the middle of the sealing device. Each of the two lead screws is equipped with a second motor at one end for driving them to rotate, and the second motor is fixedly installed inside the bag-making chamber.

[0012] After clamping one end of the plastic film, the second motor is started to drive the lead screw to rotate, which in turn drives the clamping plate to stretch the plastic film to the target length.

[0013] As a further improvement to this technical solution, the upper sides of both ends of the clamp and the sealing device are respectively fixedly provided with a No. 2 electric push rod and a No. 1 electric push rod for driving the two to open and close. Each of the two No. 2 motors has a clamping block fixedly installed on one side for clamping the cut bottom of the bag.

[0014] When clamping the end of the plastic film, the clamping plate is opened and closed by controlling two No. 2 electric push rods to complete the clamping of the plastic film. After the plastic film is stretched to the specified length, the sealing device is closed by operating two No. 1 electric push rods to complete the sealing of the plastic film and cut it to complete the bag making process.

[0015] The second objective of this invention is to provide a method for operating a plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology as described above, comprising the following steps: S1. Fix the film roll with the air expansion shaft. After the film roll is put on the air expansion shaft, the film roll is initially fixed by inflating the air expansion shaft. Then, start the No. 1 motor to drive the screw to adjust the height of the slide rod and drive the air expansion shaft to adjust the film roll to the appropriate position. Then, pass one end of the plastic film through the opening on one side of the bag making chamber, the guide wheel and the clamping block in sequence to complete the limiting of the plastic film. S2. By starting the second electric push rod, the clamping plate is closed and one end of the plastic film is clamped. Then, the second motor is started to drive the lead screw to rotate and drive the clamping plate to stretch the plastic film to the target length. S3. By starting the first electric push rod, the sealing device is closed. The sealing device cuts and seals the film roll. By starting the second motor, the clamping plate is driven to transport the sealed plastic bag to the middle of the two suction cups. Then, the linear motor and vacuum pump are started to drive the two suction cups to open the bag opening. After the two suction cups hold the bag, the vacuum pump is started to suck the bag. The linear motor is started again to control the actuator to pull the two suction cups to the side away from each other and open the bag opening. S4. The bagging and sealing machine is operated to fill and seal the bags. Then, the bagged plastic granules are transported to the palletizing assembly for palletizing via a connecting conveyor, a curved conveyor and a merging conveyor.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this FFS-based plastic pellet weighing, packaging, palletizing, and conveying device and method, the film roll is fixed and supported by an air-expanding shaft. One end of the plastic film is passed through an opening on one side of the bag-making chamber and guided to one side of the clamping plate by a guide wheel. Then, the clamping plate holds one end of the plastic film and stretches it to the target length. The film is then cut and sealed by a sealing device to complete the bag making. During the bag making process, the bag size can be precisely adjusted as needed without stopping the machine to adjust the equipment parameters. This improves the production efficiency of the equipment and ensures that the bag length is appropriate, thereby avoiding problems such as unsuitable bag length, poor sealing, or insufficient material filling.

[0017] 2. In the plastic pellet weighing, packaging, palletizing and conveying device and method based on FFS technology, during the installation of the film roll, the screw is rotated by starting the No. 1 motor and the height of the slide bar is adjusted. The air shaft is also adjusted to a suitable position to ensure that it can stably support the plastic film. This ensures that the subsequent clamping plate can stably stretch the plastic film. During the stretching of the plastic film, the two ends of the plastic film are clamped by two clamping blocks to prevent the plastic film from falling off after being cut, thus ensuring that the bag making process can continue. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bag-making chamber structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the bag-making chamber of the present invention; Figure 4 This is a schematic diagram of the support component structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a schematic diagram of the tensioning component structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle; Figure 8 This is a schematic diagram of the bag opening component structure of the present invention.

[0019] The meanings of the labels in the diagram are as follows: 1. Bag-making chamber; 2. Bag-making assembly; 21. Support assembly; 211. Slide bar; 212. Air shaft; 213. Support plate; 214. Vertical bar; 215. Screw; 216. Turbine; 217. Worm gear; 218. Motor No. 1; 22. Tensioning assembly; 221. Guide wheel; 222. Crossbar; 223. Lead screw; 224. Clamping plate; 225. Sealer; 226. Motor No. 2; 227. Electric push rod No. 1; 228. Electric push rod No. 2; 229. Clamping block; 23. Bag opening assembly; 231. Support rod; 232. Linear motor; 233. Mover; 234. Connecting rod; 235. Suction cup; 236. Vacuum pump; 237. Hose; 3. Electrical cabinet; 4. Weighing and bagging machine; 5. Connecting conveyor; 6. Curved conveyor; 7. Combining conveyor; 8. Palletizing assembly; 81. Slow-stop conveyor; 82. Palletizing conveyor; 83. Palletizing robot. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1 First, please refer to Figures 1-2As shown, one of the objectives of this embodiment is to provide a plastic pellet weighing, packaging, palletizing and conveying device based on FFS technology, including a bag-making chamber 1 and a bag-making assembly 2 installed inside it. An electrical cabinet 3 and a weighing and bagging machine 4 are fixedly installed on one side of the bag-making chamber 1. The weighing and bagging machine 4 is used to weigh and bag the plastic pellets, and the electrical cabinet 3 is used to supply power to the bag-making assembly 2 and the weighing and bagging machine 4.

[0024] Please see Figures 2-5 As shown, the bag-making assembly 2 includes, from top to bottom, a support assembly 21, a bag-opening assembly 23, and a stretching assembly 22. Specifically: The support assembly 21 includes a slide rod 211 slidably disposed in the bag-making chamber 1. An air expansion shaft 212 for fixing the film roll is externally connected to one side of the slide rod 211. Support plates 213 for supporting the air expansion shaft 212 are symmetrically fixed on the side of the slide rod 211 near the air expansion shaft 212. The two support plates 213 are rotatably connected to the two ends of the air expansion shaft 212 respectively. The bag-making chamber 1 has an opening for the film roll to pass through at the corresponding position. When installing the film roll, the film roll is first passed through the air expansion shaft 212. The air expansion shaft 212 is a high-precision transmission / positioning component that achieves the clamping and positioning of the roll material by inflating and expanding, and completes the unloading of the roll material by deflation and contraction. As a common existing technology, its function and structure will not be described in this solution. After the film roll is passed through the air expansion shaft 212, the film roll is fixed by inflating the air expansion shaft 212. To facilitate the adjustment of the height of the air shaft 212 and ensure its stable support of the film roll, vertical rods 214 are symmetrically fixed on the lower side of the slide rod 211. A screw 215 is threadedly connected to the lower side of the vertical rod 214, and the screw 215 is rotatably mounted inside the bag-making chamber 1. A turbine 216 is fixedly mounted on the screw 215, and a worm gear 217 is threadedly connected to the turbine 216. A primary motor 218 is mounted on one side of the worm gear 217 to drive its rotation, and the primary motor 218 is fixedly mounted inside the bag-making chamber 1. After the film roll is fixed on the air shaft 212, the primary motor 218 is started to drive the worm gear 217 to rotate, and simultaneously drive the turbine 216 and the screw 215 to rotate. When the screw 215 rotates, it lifts or pulls the vertical rod 214 up or down, and drives the slide rod 211 to adjust its height until the air shaft 212 is adjusted to a suitable height to ensure that it can stably support the film roll during the subsequent bag-making process.

[0025] For further details, please refer to Figure 2 and Figure 6As shown, the stretching assembly 22 includes two guide wheels 221 fixed to the inner wall of the bag making chamber 1, and a crossbar 222 fixedly installed inside the bag making chamber 1. The guide wheels 221 are located on the upper side of the slide bar 211. After adjusting the position of the air shaft 212, one end of the plastic film is inserted into the bag making chamber 1 through the opening on one side and passes through the gap between the two guide wheels 221 to limit the plastic film and prevent it from deviating in position during the subsequent bag making process. Furthermore, a lead screw 223 is symmetrically and rotatably mounted on the side of the crossbar 222 near the guide wheel 221. A clamping plate 224 is provided between the two lead screws 223, and the two lead screws 223 are respectively rotatably inserted into the two ends of the clamping plate 224. The clamping plate 224 is used to clamp one end of the plastic film and stretch it. After the plastic film passes through the guide wheel 221, one end of it passes through the clamping plate 224 and is clamped by the clamping plate 224. Then please see Figures 2-7 As shown, the flexible adjustment of the packaging bag size is achieved through the coordinated operation of the air shaft 212, guide wheel 221, lead screw 223, and clamping plate 224. Specifically: After the film roll is fixed by the air expansion shaft 212, one end of the plastic film is guided to one side of the clamping plate 224 through the opening on one side of the bag-making chamber 1 and the guide wheel 221. Each end of one of the two lead screws 223 is equipped with a secondary motor 226 for rotating both screws. The secondary motor 226 is fixedly installed inside the bag-making chamber 1. After clamping one end of the plastic film, the secondary motor 226 is started to rotate the lead screws 223, which in turn causes the clamping plate 224 to stretch the plastic film to the target length. This process simultaneously fixes the film roll by the air expansion shaft 212 and allows for adjustment of the air expansion shaft 212 during film roll installation. The height of 12 provides stable support for the film roll, laying the foundation for subsequent continuous stretching of the plastic film. On the other hand, the guide wheel 221 guides the plastic film to a limited position, and with the stable support of the air shaft 212, the screw 223 drives the clamping plate 224 to achieve precise stretching of the plastic film. The plastic film can be adjusted to a suitable length as needed. During the bag making process, the bag size can be precisely adjusted as needed without stopping the machine to adjust the equipment parameters. This improves the production efficiency of the equipment and ensures that the bag length is appropriate, thereby avoiding problems such as unsuitable bag length, poor sealing, or insufficient material filling.

[0026] To facilitate stable clamping of the plastic film and to complete sealing and cutting after stretching the plastic film to the specified length, please refer to [link to relevant documentation]. Figures 6-7As shown, a sealing device 225 for sealing and cutting plastic film is provided on one side of the clamping plate 224. As a common existing technology, the sealing device 225 can cut and seal plastic film. The structure and function of the sealing device 225 will not be described in this solution. The sealing device 225 is fixedly installed inside the bag making chamber 1. The upper sides of both ends of the clamping plate 224 and the sealing device 225 are respectively fixedly provided with a second electric push rod 228 and a first electric push rod 227 for driving them to open and close. When clamping the end of the plastic film, the clamping plate 224 is opened and closed by controlling the two second electric push rods 228 to complete the clamping of the plastic film. After the plastic film is stretched to a specified length, the sealing device 225 is closed by operating the two first electric push rods 227 to complete the sealing of the plastic film and cut it to complete the bag making process.

[0027] To prevent the plastic film from detaching after being cut, thus preventing further bag making, please refer to [link / reference needed]. Figure 7 As shown, each of the two No. 2 motors 226 is fixedly equipped with a clamping block 229 for clamping the cut end of the bag bottom. While one end of the plastic film is passed through the clamping plate 224, both ends of the plastic film are clamped by the two clamping blocks 229. After being clamped by the two clamping blocks 229, the plastic film can still be pulled by the clamping plate 224. When the plastic film is cut, it will not retract under the clamping of the clamping blocks 229. The clamping plate 224 can pass through the middle of the sealing device 225. In the subsequent bag making process, the clamping plate 224 can still clamp one end of the plastic film after passing through the sealing device 225, ensuring that the bag making process can continue.

[0028] To ensure a smooth subsequent bagging process, please refer to [link / reference]. Figures 2-8 As shown, the bag opening assembly 23 includes two support rods 231 symmetrically fixed inside the bag making chamber 1. A linear motor 232 is fixedly installed on the upper side of each of the two support rods 231. Two moving parts 233 are slidably installed on each of the two linear motors 232, and the sliding directions of the two moving parts 233 are opposite. The two moving parts 233 with the same sliding direction are fixedly connected by two connecting rods 234. A suction cup 235 for opening the bag opening is fixedly installed on the upper side of the connecting rod 234. The two suction cups 235 are located on the lower side of the clamping plate 224. After the bag is made, the screw 223 is rotated by controlling the second motor 226, and the clamping plate 224 is slid to the middle of the two suction cups 235, and the finished bag is transported to the middle of the two connecting rods 234. After the completed bag is transported between two suction cups 235, the linear motor 232 is started to control multiple moving parts 233 to move, and simultaneously drive the two suction cups 235 to move towards each other until the upper part of the bag is clamped. Then the clamping plate 224 is opened and slid to the initial position. Vacuum pumps 236 are installed on the opposite sides of the two suction cups 235. The vacuum pumps 236 are fixedly installed inside the bag-making chamber 1. The two vacuum pumps 236 are respectively connected to hoses 237 with their adjacent connecting rods 234. By starting the two vacuum pumps 236, the air in the two suction cups 235 is evacuated until the two suction cups 235 suck up the bag. Then, the linear motor 232 is started again to drive the two suction cups 235 to pull them to the opposite sides until the bag opening is opened, so that the subsequent bagging process can proceed normally. An opening corresponding to the position of the suction cups 235 is opened on one side of the bag-making chamber 1. The external clamping device extends into the bag-making chamber 1 through the opening on one side of the bag-making chamber 1 and clamps out the bag with the opening and performs subsequent weighing, bagging and sealing processes.

[0029] For further details, please refer to Figure 1 As shown, a connecting conveyor 5, a curved conveyor 6, and a merging conveyor 7 are sequentially fixed on the side of the weighing and bagging machine 4 away from the bag-making chamber 1. These are used to transport the bagged plastic granules. A palletizing assembly 8 is provided at the end of the merging conveyor 7. The connecting conveyor 5, the curved conveyor 6, the merging conveyor 7, and the palletizing assembly 8 are all common existing technologies. Their functions are to complete the conveying and palletizing of the bagged plastic granules, respectively. The structure and function of these components will not be described in this solution. After the weighing and bagging machine 4 completes the bagging of the plastic granules, the bagged plastic granules are sequentially conveyed to the palletizing assembly 8 via the connecting conveyor 5, the curved conveyor 6, and the merging conveyor 7. The palletizing assembly 8 includes a slow-stop conveyor 81 connected to the end of the merging conveyor 7. A palletizing waiting conveyor 82 is fixedly installed at the end of the slow-stop conveyor 81 away from the merging conveyor 7. A palletizing robot 83 for palletizing is provided on the side of the palletizing waiting conveyor 82 away from the slow-stop conveyor 81. After the plastic granules are bagged, they are conveyed to the slow-stop conveyor 81 and then transported to the palletizing waiting conveyor 82 for temporary storage. The palletizing work is then completed by controlling the palletizing robot 83.

[0030] Therefore, based on the above, the working principle of this invention can be summarized as follows: The film roll is fixed in place by the air shaft 212. During this process, the height of the film roll is adjusted by starting the first motor 218, which drives the slide bar 211 and the air shaft 212 to achieve a suitable height and stable support. Then, one end of the plastic film is guided to one side of the clamping plate 224 by the guide wheel 221 and clamped by the clamping plate 224. During this process, the two ends of the plastic film are clamped by the clamping block 229 to prevent it from falling off after being cut. Then, the second motor 226 is started to drive the clamping plate 224 to stretch the plastic film to the target length. The length can be precisely adjusted as needed during the bag making process. The bag size is adjusted without stopping the machine to adjust the equipment parameters, which improves the production efficiency of the equipment. The bag is sealed and cut by starting the sealing device 225. The cut plastic film is conveyed by the clamping plate 224 to the middle of the two suction cups 235. Then, the linear motor 232 and the vacuum pump 236 drive the two suction cups 235 to suck up the bag opening and open the bag opening to facilitate the subsequent plastic bagging process. Then, the weighing bagging machine 4 is controlled to complete the plastic bagging process. The bagged plastic granules are then conveyed to the palletizing assembly 8 for palletizing by the connecting conveyor 5, the curved conveyor 6 and the merging conveyor 7.

[0031] The second objective of this embodiment is to provide a method for operating the aforementioned FFS-based plastic pellet weighing, packaging, palletizing, and conveying device, comprising the following method steps: S1. Fix the film roll with the air expansion shaft 212. After the film roll is put on the air expansion shaft 212, the film roll is initially fixed by inflating the air expansion shaft 212. Then, the first motor 218 is started to drive the screw 215 to adjust the height of the slide bar 211 and drive the air expansion shaft 212 to adjust the film roll to a suitable position. Then, one end of the plastic film is passed through the opening on one side of the bag making chamber 1, the guide wheel 221 and the clamping block 229 in sequence to complete the limiting of the plastic film. S2. By starting the second electric push rod 228, the clamping plate 224 is closed and one end of the plastic film is clamped. Then, the second motor 226 is started to drive the lead screw 223 to rotate and drive the clamping plate 224 to stretch the plastic film to the target length. S3. By starting the first electric push rod 227, the sealing device 225 is driven to close. The sealing device 225 cuts and seals the film roll. By starting the second motor 226, the clamping plate 224 is driven to transport the sealed plastic bag to the middle of the two suction cups 235. Then, the linear motor 232 and the vacuum pump 236 are started to drive the two suction cups 235 to open the bag opening. After the two suction cups 235 hold the bag, the vacuum pump 236 is started to suck the bag. The linear motor 232 is started again to control the mover 233 to pull the two suction cups 235 to the side away from each other and open the bag opening. S4. The bagging and sealing machine 4 is operated to fill and seal the bags. Then, the bagged plastic granules are transported to the palletizing assembly 8 for palletizing via the connecting conveyor 5, the curved conveyor 6 and the merging conveyor 7.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology, comprising a bag-making chamber (1) and a bag-making assembly (2) disposed therein, wherein the bag-making assembly (2) comprises, from top to bottom, a support assembly (21), a bag-opening assembly (23), and a stretching assembly (22), characterized in that: The support assembly (21) includes a slide rod (211) slidably disposed in the bag-making chamber (1), and an air expansion shaft (212) for fixing the film roll is connected to one side of the slide rod (211), and the bag-making chamber (1) is provided with an opening for the film roll to pass through at a corresponding position; The stretching assembly (22) includes two guide wheels (221) fixed to the inner wall of the bag making chamber (1) and a crossbar (222) fixed inside the bag making chamber (1), and the guide wheels (221) are located on the upper side of the slide bar (211); The crossbar (222) is symmetrically mounted with lead screws (223) on the side near the guide wheel (221). A clamping plate (224) is provided between the two lead screws (223), and the two lead screws (223) are respectively rotated and inserted into the two ends of the clamping plate (224). The packaging bag size can be flexibly adjusted by the cooperation of the air shaft (212), guide wheel (221), lead screw (223) and clamping plate (224).

2. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 1, characterized in that: The slide bar (211) is symmetrically fixed with support plates (213) for supporting the air shaft (212) on one side near the air shaft (212). The two support plates (213) are rotatably connected to the two ends of the air shaft (212) respectively.

3. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 1, characterized in that: The slide bar (211) has vertical rods (214) fixedly fixed symmetrically on the lower side. The lower side of the vertical rod (214) is threaded with a screw (215), and the screw (215) is rotatably disposed inside the bag making chamber (1). A turbine (216) is fixedly installed on the screw (215), and a worm (217) is threadedly connected to the turbine (216). A first motor (218) for driving the worm (217) to rotate is provided on one side of the worm (217), and the first motor (218) is fixedly installed inside the bag making chamber (1).

4. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 1, characterized in that: A sealing device (225) for sealing and cutting plastic film is provided on one side of the clamping plate (224). The sealing device (225) is fixedly installed inside the bag making chamber (1), and the clamping plate (224) can pass through the middle of the sealing device (225). Each of the two lead screws (223) is equipped with a second motor (226) for driving them to rotate, and the second motor (226) is fixedly installed inside the bag making chamber (1).

5. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 4, characterized in that: The upper sides of both ends of the clamp (224) and the sealing device (225) are respectively fixedly provided with a second electric push rod (228) and a first electric push rod (227) for driving the two to open and close. Each of the two No. 2 motors (226) is fixedly provided with a clamping block (229) for clamping the cut-off part of the bag bottom.

6. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 1, characterized in that: The bag opening assembly (23) includes two support rods (231) that are symmetrically fixed inside the bag making chamber (1). A linear motor (232) is fixedly installed on the upper side of each of the two support rods (231). Two movers (233) are slidably installed on each of the two linear motors (232), and the sliding directions of the two movers (233) are opposite.

7. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 6, characterized in that: Two moving parts (233) with the same sliding direction are fixedly connected by two connecting rods (234), and a suction cup (235) for opening the bag opening is fixedly provided on the upper side of the connecting rod (234). Vacuum pumps (236) are provided on the side of the two suction cups (235) that are far apart from each other. The vacuum pumps (236) are fixedly installed inside the bag making chamber (1). The two vacuum pumps (236) are respectively fixedly connected to the adjacent connecting rods (234) by hoses (237).

8. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 1, characterized in that: An electrical cabinet (3) and a weighing and bagging machine (4) are fixedly installed on one side of the bag-making chamber (1). A connecting conveyor (5), a curved conveyor (6) and a merging conveyor (7) are fixedly installed on the side of the weighing and bagging machine (4) away from the bag-making chamber (1) in sequence for transporting the bagged plastic granules.

9. The plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology according to claim 8, characterized in that: The end of the merging conveyor (7) is provided with a palletizing assembly (8), which includes a slow-stop conveyor (81) connected to the end of the merging conveyor (7). A palletizing waiting conveyor (82) is fixedly provided at the end of the slow-stop conveyor (81) away from the merging conveyor (7). A palletizing robot (83) for palletizing is provided on the side of the palletizing waiting conveyor (82) away from the slow-stop conveyor (81).

10. A method of using a plastic pellet weighing, packaging, palletizing, and conveying device based on FFS technology as described in any one of claims 1-9, characterized in that, The methods and steps include the following: S1. Fix the film roll with the air shaft (212), then pass one end of the plastic film through the opening on one side of the bag making chamber (1), the guide wheel (221) and the clamping block (229) in sequence. Then, start the No. 1 motor (218) to drive the screw (215) to adjust the height of the slide bar (211) and drive the air shaft (212) to adjust the film roll to the appropriate position. S2. By starting the second electric push rod (228), the clamping plate (224) is closed and one end of the plastic film is clamped. Then, the second motor (226) is started to drive the lead screw (223) to rotate and drive the clamping plate (224) to stretch the plastic film to the target length. S3. By starting the first electric push rod (227), the sealing device (225) is driven to close. The sealing device (225) cuts and seals the film roll. Then, the linear motor (232) and vacuum pump (236) are started to drive the two suction cups (235) to open the bag opening. S4. The bagging and sealing machine (4) is operated to fill the bags. Then, the bagged plastic granules are transported to the palletizing assembly (8) for palletizing via the connecting conveyor (5), the curved conveyor (6) and the merging conveyor (7).

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