Bale press
By introducing automated processes for weighing, inspection, and cleaning into the packaging machine, the problem of poor product quality was solved, achieving accurate inspection and efficient cleaning, and reducing packaging costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANLIANG COLOUR PRINTING&BOX MFG CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-10
Smart Images
Figure CN224477145U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging technology, and in particular to a packaging machine. Background Technology
[0002] With the development of packaging technology, packing machines have emerged. A packing machine is a device that seals packaging bags. In traditional technology, packing machines typically use a conveyor to transport packaging bags containing products to a sealing machine, where the sealing machine seals the bags to achieve packaging. However, current packing machines struggle to guarantee the quality of the packaged products. The quantity of all packaged products needs to be rechecked, and safety indicators need to be tested. If the quantity of packaged products is insufficient or safety indicators fail to meet standards, the packaging bags need to be removed and the products repackaged. This presents a technical problem: poor quality of the finished products from packing machines leads to increased packaging costs. Utility Model Content
[0003] A packaging machine includes: a screening module, a packaging module, a detection module, and a feeding module arranged sequentially in the conveying direction. The screening module includes a weighing mechanism and a screening conveyor. The weighing mechanism is used to detect the weight of the packaging bag to be packaged. The screening conveyor is located downstream of the weighing mechanism. The packaging module is located downstream of the screening conveyor and is used to package the packaging bag to be packaged to obtain a packaging bag to be inspected. The detection module includes a safety detection mechanism and a cleaning mechanism. The safety detection mechanism is located downstream of the packaging module and is used to detect the packaging bag to be inspected to obtain a packaging bag to be cleaned. The cleaning mechanism is located downstream of the safety detection mechanism and is used to clean the packaging bag to be cleaned to obtain a finished product. The feeding module is located downstream of the cleaning mechanism and is used to receive and convey the finished product.
[0004] In one embodiment, the weighing mechanism includes a weighing conveyor, a support frame, and a feed sensor. The support frame covers the weighing conveyor and has a feed inlet and a discharge outlet. The feed sensor is mounted on the support frame and is signal-connected to the weighing conveyor. The feed sensor is positioned corresponding to the feed inlet.
[0005] In one embodiment, the weighing mechanism further includes a discharge sensor mounted on the support frame. The discharge sensor is signal-connected to the weighing conveyor and is positioned corresponding to the discharge port.
[0006] In one embodiment, the weighing mechanism further includes a controller that is signal-connected to the weighing conveyor and the feed sensor.
[0007] In one embodiment, the packaging module includes a packaging conveyor, a sealing machine, and a baffle plate. The packaging conveyor is connected to the sealing machine and the baffle plate on opposite sides along the feeding direction, and the packaging conveyor is located on the side of the sealing machine higher than the side of the packaging conveyor located on the baffle plate. The packaging conveyor has a receiving position on the side closer to the sealing machine, and the receiving position is located at the upstream end of the sealing machine along the feeding direction of the packaging conveyor.
[0008] In one embodiment, the safety testing mechanism includes a testing conveyor and a formaldehyde detector. The testing conveyor is used to receive the packaging bags to be tested and transport them to the cleaning mechanism. The formaldehyde detector is used to test the packaging bags on the testing conveyor.
[0009] In one embodiment, the cleaning mechanism includes a cleaning conveyor, a cleaning hood, and an air jet assembly. The cleaning hood is mounted on the cleaning conveyor and forms a cleaning space with the cleaning conveyor. The air jet assembly is disposed within the cleaning space.
[0010] In one embodiment, the cleaning conveyor includes a frame, drive rollers, a drive unit, a conveyor belt, and a dust collection box. There are two drive rollers, both of which are rotatably mounted on the frame and spaced apart. The drive unit drives one of the drive rollers to rotate. The conveyor belt has ventilation holes and is connected to each of the drive rollers. The dust collection box is located on the side of the conveyor belt away from the cleaning space.
[0011] In one embodiment, the jet assembly includes a jet frame and an air nozzle, the jet frame being connected to the cleaning conveyor, and the air nozzle being mounted on the jet frame and oriented toward the conveyor belt.
[0012] In one embodiment, the cleaning hood includes a hood body and an air curtain. The hood body and the cleaning conveyor form a cleaning space and are provided with an entrance and an exit connecting the cleaning space. There are two air curtains, both of which are connected to the hood body. One air curtain covers the entrance and the other air curtain covers the exit.
[0013] The beneficial effects of the packaging machine provided in this application are as follows: It adopts a sequential setup of a screening module, a packaging module, a detection module, and a feeding module, forming a complete automated packaging process of measurement, packaging, detection, and feeding. The weighing mechanism of the screening module accurately detects the weight of the packaging bags, ensuring that the quantity of packaging within the bags entering the packaging stage meets requirements. The safety detection mechanism of the detection module performs safety index testing on the bags to be inspected, ensuring their safety. A cleaning mechanism removes impurities from the surface of the bags to be cleaned. By employing a method of weighing before packaging and inspection before cleaning, the collaborative operation of each module effectively avoids insufficient quantity or substandard safety indicators in the packaged finished product. This effectively reduces the need to remove packaging bags and repackage the products, thereby improving the quality of the packaged product and effectively reducing packaging costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the packaging machine shown in this utility model;
[0015] Figure 2 for Figure 1 The diagram shows the structural schematic of the weighing mechanism of the baling machine.
[0016] Figure 3 for Figure 1 The diagram shows the structural schematic of the packaging module of the packaging machine.
[0017] Figure 4 for Figure 1 The diagram shows the structure of the safety detection mechanism of the packaging machine.
[0018] Figure 5 for Figure 1 An exploded view of the cleaning mechanism of the packaging machine is shown.
[0019] The meanings of the numbers in the attached diagram are as follows:
[0020] 100. Packaging machine;
[0021] 10. Screening module; 11. Weighing mechanism; 111. Weighing conveyor; 112. Support frame; 113. Feed sensor; 114. Feed inlet; 115. Discharge outlet; 116. Discharge sensor; 117. Controller; 12. Screening conveyor;
[0022] 20. Packaging module; 21. Packaging conveyor; 211. Receiving position; 22. Sealing machine; 23. Material baffle;
[0023] 30. Detection module; 31. Safety detection mechanism; 311. Detection conveyor; 312. Formaldehyde detector; 32. Cleaning mechanism; 35. Cleaning conveyor; 351. Frame; 352. Drive roller; 353. Conveyor belt; 354. Dust collection box; 36. Cleaning hood; 361. Hood body; 37. Air jet assembly; 371. Air jet frame; 372. Air nozzle;
[0024] 40. Material feeding module. Detailed Implementation
[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0027] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0031] like Figure 1 As shown, this is the packaging machine 100 of this utility model, used to package bags containing products.
[0032] like Figure 1As shown, the packaging machine 100 includes: a screening module 10, a packaging module 20, a detection module 30, and a feeding module 40 arranged sequentially in the conveying direction. The screening module 10 includes a weighing mechanism 11 and a screening conveyor 12. The weighing mechanism 11 is used to detect the weight of the packaging bags to be packaged. The screening conveyor 12 is located downstream of the weighing mechanism 11. The packaging module 20 is located downstream of the screening conveyor 12 and is used to package the packaging bags to be packaged to obtain packaging bags to be inspected. The detection module 30 includes a safety detection mechanism 31 and a cleaning mechanism 32. The safety detection mechanism 31 is located downstream of the packaging module 20 and is used to detect the packaging bags to be inspected to obtain packaging bags to be cleaned. The cleaning mechanism 32 is located downstream of the safety detection mechanism 31 and is used to clean the packaging bags to be cleaned to obtain finished products. The feeding module 40 is located downstream of the cleaning mechanism 32 and is used to receive and convey finished products. The machine employs a sequential arrangement of screening modules... The selection module 10, packaging module 20, detection module 30, and unloading module 40 form a complete automated packaging process of measurement, packaging, detection, and unloading. The weighing mechanism 11 of the selection module 10 accurately detects the weight of the packaging bags. By judging the weight, it is ensured that the number of packages in the packaging bags to be packaged in the packaging stage meets the requirements. The safety detection mechanism 31 of the detection module 30 performs safety index detection on the packaging bags to be tested to ensure the safety index of the packaging bags to be tested. The cleaning mechanism 32 removes impurities from the surface of the packaging bags to be cleaned. By weighing before packaging and testing before cleaning, the collaborative operation of each module effectively avoids insufficient quantity or failure to meet safety index of the finished product after packaging. This effectively reduces the need to remove packaging bags and repackage products, thereby improving the quality of the finished products of the packaging machine 100 and effectively reducing packaging costs.
[0033] The following text, combined with Figures 1 to 5 Further explanation is provided regarding the aforementioned packing machine 100.
[0034] like Figures 1 to 2As shown, in order to improve the detection accuracy of the weighing conveyor 111, the weighing mechanism 11 includes a weighing conveyor 111, a support frame 112, and a feed sensor 113. The support frame 112 covers the weighing conveyor 111 and is provided with a feed inlet 114 and a discharge outlet 115. The feed sensor 113 is installed on the support frame 112 and is signal-connected to the weighing conveyor 111. The feed sensor 113 is positioned corresponding to the feed inlet 114. The weighing conveyor 111 is a weighing screw conveyor, and the feed sensor 113 can be selected as a proximity switch. The feed sensor 113 can detect in real time whether the packaging bag to be packaged has entered the feed inlet 114 of the weighing conveyor 111, thereby triggering the weighing conveyor 111 to detect the weight of the packaging bag to be packaged. This avoids the situation where multiple packaging bags enter the weighing conveyor, leading to weight detection errors, thereby improving the detection accuracy of the weighing conveyor 111.
[0035] Furthermore, such as Figure 2 As shown, the weighing mechanism 11 also includes a discharge sensor 116 mounted on the support frame 112. The discharge sensor 116 is signal-connected to the weighing conveyor 111 and is set to correspond to the position of the discharge port 115. Similar to the feed sensor 113, the discharge sensor 116 can be selected as a proximity switch. By using the discharge sensor 116 to detect whether the packaging bag to be packaged has left the weighing conveyor 111, the operating status of the weighing conveyor 111 can be precisely controlled, ensuring that the weighing conveyor 111 receives the packaging bag to be packaged when it is unloaded. This avoids the situation where the weighing conveyor 111 fails to deliver the packaging bag to be packaged in time, resulting in multiple weighing conveyors 111 on the weighing conveyor 111 and causing weighing data errors, thereby further improving the detection accuracy of the weighing conveyor 111.
[0036] To improve the automation and efficiency of the weighing process, such as Figure 2 As shown, the weighing mechanism 11 also includes a controller 117, which is connected to the weighing conveyor 111 and the feed sensor 113. The controller 117 is a control terminal, namely one or more of a computer, mobile phone, or tablet. The controller 117 can automatically control the start, stop, and running speed of the weighing conveyor 111 according to the signal from the feed sensor 113, so as to realize intelligent control of the weighing process. For example, when the feed sensor 113 detects that the packaging bag enters the feed inlet 114, the controller 117 controls the weighing conveyor 111 to transport the packaging bag at a set speed for weighing. After the weighing is completed, the controller controls the conveyor to transport the packaging bag to the screening conveyor 12, thereby improving the automation and weighing efficiency of the weighing process.
[0037] To improve the sealing efficiency and consistency of the sealing position of packaging bags, such as Figure 3As shown, the packaging module 20 includes a packaging conveyor 21, a sealing machine 22, and a baffle plate 23. The packaging conveyor 21 is connected to the sealing machine 22 and the baffle plate 23 on opposite sides along the feeding direction. The packaging conveyor 21 is located on the side of the sealing machine 22 higher than the side of the sealing machine 22 located on the baffle plate 23. The packaging conveyor 21 is provided with a receiving position 211 on the side of the sealing machine 21 closest to the sealing machine 22. The receiving position 211 is located upstream of the sealing machine 22 along the feeding direction of the packaging conveyor 21. The packaging conveyor 21 is inclined so that the packaging bag can enter the sealing machine 22 at a predetermined distance under the support of the baffle plate 23 during the conveying process. This ensures that the packaging bag to be packaged can accurately enter the sealing area of the sealing machine 22, making the positioning of the packaging bag more accurate during the packaging process, thereby improving the sealing efficiency and sealing position consistency of the packaging bag.
[0038] To improve the safety of the finished product, such as Figure 4 As shown, the safety testing organization 31 includes a testing conveyor 311 and a formaldehyde detector 312. The testing conveyor 311 is used to receive the packaging bags to be tested and transport them to the cleaning organization 32. The formaldehyde detector 312 is used to test the packaging bags to be tested on the testing conveyor 311. The formaldehyde detector 312 can test the formaldehyde content of the product inside the packaging bag or the packaging bag itself to ensure that the product meets safety and environmental protection standards. It is especially suitable for fields such as infant products, food, and medicine that have strict requirements for formaldehyde residue, thereby improving the safety of finished products.
[0039] To improve the cleaning efficiency and effectiveness of the finished product, such as Figure 5 As shown, the cleaning mechanism 32 includes a cleaning conveyor 35, a cleaning hood 36, and an air jet assembly 37. The cleaning hood 36 is installed on the cleaning conveyor 35 and forms a cleaning space with the cleaning conveyor 35. The air jet assembly 37 is set in the cleaning space. By using the cleaning conveyor 35 and the cleaning hood 36 to form a closed cleaning space, it can effectively prevent dust generated during the cleaning process from spreading to the external environment. The air jet assembly 37 sprays airflow onto the surface of the packaging bag, which can effectively remove dust, debris and other impurities from the surface of the packaging bag. Combined with the conveying function of the cleaning conveyor 35, it can achieve continuous cleaning of the packaging bag and improve the cleaning efficiency and cleaning effect of the finished product.
[0040] To maintain the continuous and efficient operation of cleaning facility 32, such as Figure 5As shown, the cleaning conveyor 35 includes a frame 351, drive rollers 352, a drive unit (not shown), a conveyor belt 353, and a dust collection box 354. There are two drive rollers 352, both rotatably mounted on the frame 351 and spaced apart. The drive unit drives one of the drive rollers 352 to rotate. The conveyor belt 353 has ventilation holes and is connected to each drive roller 352. The dust collection box 354 is located on the side of the conveyor belt 353 away from the cleaning space. The drive unit is a combination of a motor and a drive belt; the motor drives the transmission belt... The belt is connected to one of the drive rollers 352 to control the conveying cost of the conveyor belt 353. By designing ventilation holes on the conveyor belt 353, the airflow ejected by the jet assembly 37 can carry impurities through the conveyor belt 353 and fall into the dust collection box 354 below, preventing impurities from re-adhering to the packaging bag in the cleaning space, thereby improving the cleaning stability of the cost. In addition, the design of the dust collection box 354 facilitates the collection and cleaning of impurities, so as to maintain the continuous and efficient operation of the cleaning mechanism 32.
[0041] To enhance the cleaning effect on the finished product, such as Figure 5 As shown, the jet assembly 37 includes a jet frame 371 and an air nozzle 372. The jet frame 371 is connected to the cleaning conveyor 35. The air nozzle 372 is mounted on the jet frame 371 and is positioned facing the conveyor belt 353. The air nozzle 372 is connected to an external air source. For example, the air nozzle 372 is connected to an air compressor via a solenoid valve. The solenoid valve controls the opening and closing of the air compressor and the air nozzle 372 to control the jet operation of the air nozzle 372. The jet frame 371 can adjust the position and angle of the air nozzle 372 according to the width of the conveyor belt 353 and the size of the packaging bag to ensure that the airflow evenly covers the surface of the packaging bag and improves the comprehensiveness of cleaning. The air nozzle 372 is positioned facing the conveyor belt 353 and can directly blow the packaging bag during the conveying process, so that impurities fall into the dust collection box 354 through the ventilation holes with the airflow, thereby enhancing the cleaning effect on the finished product.
[0042] To improve the dust prevention and cleaning efficiency of cleaning unit 32, such as Figure 5 As shown, the cleaning hood 36 includes a hood body 361 and a curtain (not shown). The hood body 361 and the cleaning conveyor 35 enclose a cleaning space, and are provided with an entrance and an exit connecting the cleaning space. There are two air curtains, both of which are connected to the hood body 361. One air curtain covers the entrance, and the other air curtain covers the exit. The curtain prevents external dust from entering the cleaning space at the entrance and exit, and at the same time prevents impurities generated during the cleaning process from spreading to the external environment, thus maintaining the cleanliness of the cleaning space. Even when packaging bags enter and exit the cleaning space, the curtain can effectively isolate the internal and external environments, ensuring that the cleaning effect is not affected by external factors, thereby achieving the purpose of improving the dust prevention and cleaning efficiency of the cleaning mechanism 32.
[0043] The packaging machine 100 provided in this application is used as follows: When the packaging bag to be packaged enters the weighing conveyor 111 from the feed port 114, the feed sensor 113 triggers the controller 117 to control the weighing conveyor 111 to start, weigh the packaging bag to confirm whether the product inside the packaging bag meets the requirements. After weighing, the packaging bag to be packaged is conveyed to the screening conveyor 12 through the discharge port 115. After the discharge sensor 116 detects that the packaging bag has left, it can control the weighing conveyor 111 to stop or continue to receive the next packaging bag, realizing accurate weight screening. When the screening conveyor 12 conveys the packaging bag to be packaged to the receiving position 211 of the packaging conveyor 21, the packaging bag to be packaged is limited by the baffle plate 23 on the inclined packaging conveyor 21. The sealing machine 22 transports the package and seals it to obtain a packaging bag to be tested. When the packaging bag to be tested passes through the formaldehyde detector 312 of the safety testing institution 31, the formaldehyde content of the packaging bag to be tested is detected by the formaldehyde detector 312. After the formaldehyde detector 312 detects it, the qualified packaging bag to be tested is sent out of the formaldehyde detector 312 to obtain a packaging bag to be cleaned. When the packaging bag to be cleaned enters the cleaning space, the jet assembly 37 sprays airflow to sweep the surface of the packaging bag to be cleaned. Impurities fall into the dust collection box 354 through the ventilation holes of the conveyor belt 353 with the airflow. At the same time, the curtain prevents external dust from entering the cleaning space to ensure the cleaning effect. Finally, the packaging bag to be cleaned after being dusted by the cleaning institution 32 becomes a finished product and is output by the unloading module 40.
[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A packaging machine, characterized in that, include: The following modules are arranged sequentially according to the conveying direction: a screening module, a packaging module, a detection module, and a feeding module. The screening module includes a weighing mechanism and a screening conveyor. The weighing mechanism is used to detect the weight of the packaging bag to be packaged. The screening conveyor is located downstream of the weighing mechanism. The packaging module is located downstream of the screening conveyor and is used to package the packaging bag to be packaged to obtain a packaging bag to be inspected. The detection module includes a safety detection mechanism and a cleaning mechanism. The safety detection mechanism is located downstream of the packaging module and is used to detect the packaging bag to be inspected to obtain a packaging bag to be cleaned. The cleaning mechanism is located downstream of the safety detection mechanism and is used to clean the packaging bag to be cleaned to obtain a finished product. The feeding module is located downstream of the cleaning mechanism and is used to receive and convey the finished product.
2. The packaging machine according to claim 1, characterized in that, The weighing mechanism includes a weighing conveyor, a support frame, and a feed sensor. The support frame covers the weighing conveyor and has a feed inlet and a discharge outlet. The feed sensor is installed on the support frame and is signal-connected to the weighing conveyor. The feed sensor is positioned corresponding to the feed inlet.
3. The packaging machine according to claim 2, characterized in that, The weighing mechanism also includes a discharge sensor installed on the support frame. The discharge sensor is signal-connected to the weighing conveyor and is positioned corresponding to the discharge port.
4. The packaging machine according to claim 2, characterized in that, The weighing mechanism also includes a controller, which is signal-connected to the weighing conveyor and the feed sensor.
5. The packaging machine according to claim 1, characterized in that, The packaging module includes a packaging conveyor, a sealing machine, and a baffle plate. The packaging conveyor is connected to the sealing machine and the baffle plate on opposite sides along the feeding direction, and the packaging conveyor is located on the side of the sealing machine higher than the side of the packaging conveyor located on the baffle plate. The packaging conveyor has a receiving position on the side closer to the sealing machine, and the receiving position is located at the upstream end of the sealing machine along the feeding direction of the packaging conveyor.
6. The packaging machine according to claim 1, characterized in that, The safety testing organization includes a testing conveyor and a formaldehyde testing machine. The testing conveyor is used to receive the packaging bags to be tested and transport them to the cleaning organization. The formaldehyde testing machine is used to test the packaging bags to be tested on the testing conveyor.
7. The packaging machine according to claim 1, characterized in that, The cleaning mechanism includes a cleaning conveyor, a cleaning hood, and an air jet assembly. The cleaning hood is installed on the cleaning conveyor and forms a cleaning space with the cleaning conveyor. The air jet assembly is disposed within the cleaning space.
8. The packaging machine according to claim 7, characterized in that, The cleaning conveyor includes a frame, drive rollers, a drive unit, a conveyor belt, and a dust collection box. There are two drive rollers, both of which are rotatably mounted on the frame and spaced apart. The drive unit drives one of the drive rollers to rotate. The conveyor belt has ventilation holes and is connected to each of the drive rollers. The dust collection box is located on the side of the conveyor belt away from the cleaning space.
9. The packaging machine according to claim 8, characterized in that, The jet assembly includes a jet frame and an air nozzle. The jet frame is connected to the cleaning conveyor, and the air nozzle is mounted on the jet frame and oriented toward the conveyor belt.
10. The packaging machine according to claim 9, characterized in that, The cleaning hood includes a hood body and an air curtain. The hood body and the cleaning conveyor form a cleaning space and are provided with an entrance and an exit connecting the cleaning space. There are two air curtains, both of which are connected to the hood body. One air curtain covers the entrance and the other air curtain covers the exit.