Waste discharging system and method for packaging bag

Abstract

The present invention discloses a waste discharging system for a packaging bag, which includes a waste discharging device and a detection and judgment device, and the waste discharging device and the detection and judgment device are communicatively connected. The waste discharging device includes a first conveyor roller group, a waste discharging unit, and a second conveyor roller group that are sequentially arranged along the transmission path of the packaging bag. The waste discharging unit includes a path switching component and a waste collection component. The inlet of the path switching component is communicated with the outlet of the first conveyor roller group, and the outlet of the path switching component is switchably communicated with the inlet of the waste collection component or the second conveyor roller group. The detection and judgment device includes an information detection unit and an information processing unit. The information processing unit judges whether the packaging bag is a waste packaging bag according to the detection information of each packaging bag. When the packaging bag calibrated as a waste packaging bag is conveyed to the waste discharging unit along the transmission path, the outlet of the path switching component is communicated with the waste collection component. This waste discharging system can detect each packaging bag one by one in real time and has the advantages of high efficiency and high automation.

Description

Technical Field

[0001] The present invention relates to the technical field related to bag making, and particularly relates to a waste discharging system and a waste discharging method for packaging bags. Background Art

[0002] Packaging bags are closely related to our lives. Common packaging bags include non-woven bags, woven belts, plastic bags, etc. Taking non-woven bags as an example, non-woven bags have the characteristics of environmental protection and practicality, and have been vigorously promoted and used in recent years, which has promoted the rapid development of the fully automatic forming technology for non-woven bag making. However, with the development of non-woven fabrics in China in recent years, three-dimensional bags with stronger three-dimensional sense have become the mainstream of non-woven bags. The existing non-woven three-dimensional bags are formed by a three-dimensional bag forming machine at one time. During processing, the flat non-woven fabric needs to be pressed into a cuboid through a die lifting device. After the non-woven fabric is processed into a non-woven three-dimensional bag, in order to facilitate packing and transportation, each three-dimensional bag needs to be flattened, sorted into piles and then packed and transported together.

[0003] In the process of forming the existing three-dimensional bag forming machine, there may be defective products. The parts with the highest defective rate are concentrated in the handle part and the side part. Common defective product problems are that the handle is not bonded, the handle is damaged, the side part is damaged by heat sealing or the side part is not bonded. However, the existing technology can only judge and discharge waste by manual selection after forming, resulting in low work efficiency.

[0004] Therefore, the packaging bag forming machine in the existing technology has problems of being unable to judge defective products and unable to perform waste discharging treatment. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the defective packaging bags produced by the packaging bag forming machine in the existing technology need to be manually identified and sorted, which increases the labor cost and reduces the work efficiency at the same time.

[0006] To solve the above technical problems, an embodiment of the present invention discloses a waste discharging system for packaging bags, including a waste discharging device and a detection and judgment device, and the waste discharging device and the detection and judgment device are communicatively connected.

[0007] The waste discharging device includes a first conveyor roller group, a waste discharging unit and a second conveyor roller group arranged in sequence along the transmission path of the packaging bag. Among them, the first conveyor roller group and the second conveyor roller group are used to convey the packaging bag along the transmission path, and both include at least two conveyor rollers; and the waste discharging unit includes a path switching component and a waste collection component. Among them, the inlet of the path switching component is communicated with the outlet of the first conveyor roller group, and the outlet of the path switching component is switchably communicated with the inlet of the waste collection component or the second conveyor roller group.

[0008] The detection and judgment device includes an information detection unit and an information processing unit; among them, the information detection unit includes a detection component arranged upstream of the waste discharging device along the transmission path. The detection component detects the detection information of each packaging bag on the transmission path one by one in real time. The detection information includes the appearance information of the handle part of the packaging bag and the appearance information of the side heat-sealed part, and transmits the detection information of each packaging bag to the information processing unit; the information processing unit includes a judgment module and a calibration module. The judgment module judges whether the packaging bag is a waste packaging bag according to the detection information of each packaging bag. When the judgment module judges that the packaging bag is a waste packaging bag, the calibration module calibrates the waste packaging bag and transmits the calibration result to the control unit.

[0009] The control unit controls the switching of the outlet of the path switching component according to the calibration result. When the qualified packaging bag is conveyed to the waste discharging unit along the transmission path, the outlet of the path switching component is communicated with the inlet of the second conveying roller group; when the packaging bag calibrated as a waste packaging bag is conveyed to the waste discharging unit along the transmission path, the outlet of the path switching component is communicated with the waste collection component.

[0010] Adopting the above technical solution, the present application discloses a waste discharging system applied to a packaging bag making machine. The waste discharging system includes a waste discharging device and a detection and judgment device. The detection and judgment device detects and judges in real time whether each produced packaging bag is a waste packaging bag. If it is a waste packaging bag, the corresponding calibration information is sent to the waste discharging device (waste discharging unit). The waste discharging device performs waste discharging treatment on the waste packaging bag, and the qualified packaging bags are subjected to normal conveying, sorting, packing, etc., so as to ensure that only qualified packaging bags are sorted in the bag sorting device at the end. The waste discharging system of the packaging bag disclosed in the present application can ensure that only products that meet the quality standards (qualified packaging bags) enter the market, which helps to improve the consistency and reliability of the produced packaging bags.

[0011] Furthermore, the waste discharging system of the packaging bag disclosed in the present application can be automatically detected by the detection and judgment device, and the waste discharging device and the detection and judgment device are communicatively connected. The whole system has a high degree of intelligence and automation, solves the problem that the existing packaging bag making machine cannot perform automatic detection and waste discharging, and can only perform waste discharging by manual selection or detection, and has the advantages of high efficiency and high automation, and can judge and confirm and perform waste discharging treatment on the same waste packaging bag.

[0012] And in the waste discharging system disclosed in the present application, the waste discharging unit is arranged between the first conveying roller group and the second conveying roller group on the transmission path of the packaging bag. The qualified packaging bags are normally conveyed and transmitted between the first conveying roller group and the second conveying roller group. Only when the waste packaging bag passes through, the path switching component on the waste discharging unit switches to make the outlet communicate with the waste collection component for waste discharging and collection of the waste packaging bag.

[0013] Embodiments of the present invention also disclose a waste discharging system for a packaging bag. The waste discharging unit includes a control unit, and the path switching component includes a waste discharging driving member and a waste discharging blocking member. The waste collection component includes a waste product conveyor belt located at the outlet of the waste discharging blocking member. The control unit is communicatively connected to the detection and judgment device and controls the operation of the waste discharging driving member according to the calibration result. The waste discharging driving member can drive the waste discharging blocking member to reciprocate toward the transmission path. Wherein, when a packaging bag calibrated as a waste product packaging bag is conveyed to the path switching component along the transmission path, the waste discharging driving member drives the waste discharging blocking member to move toward the transmission path, and the outlet of the waste discharging blocking member is communicated with the inlet of the waste product conveyor belt.

[0014] With the above technical solution, the control unit can control the operation of the waste discharging driving member according to the calibration result of the waste product packaging bag transmitted by the calibration module, and realize that the waste product packaging bag leads to the waste collection component. This waste discharging system is arranged on the transmission path of the packaging bag and can be realized by changing the path during waste discharging, without the need to additionally set a grasping mechanism for the waste product packaging bag, and has the advantage of simple structure.

[0015] Further preferably, the first conveyor roller group and the second conveyor roller group are arranged at intervals along the transmission path. The waste discharging unit is arranged between the intervals of the first conveyor roller group and the second conveyor roller group.

[0016] The waste discharging driving member includes a driving motor, an eccentric wheel mechanism, and a transmission connecting rod. The eccentric wheel mechanism is in transmission connection with the output end of the driving motor. One end of the transmission connecting rod is rotatably connected to the eccentric wheel mechanism, and the other end is rotatably connected to the waste discharging blocking member. The waste discharging blocking member includes a waste discharging blocking plate, and the waste discharging blocking plate is inclined.

[0017] The waste discharging unit further includes a mounting seat. The mounting seat is arranged on the frame. The driving motor is fixedly arranged on one side of the mounting seat. A guide rail is arranged on the mounting seat, and a moving block adapted to the guide rail and movable is arranged on the waste discharging blocking plate.

[0018] The waste discharging blocking plate can be switched between a retracted state and a blocking state. When the waste discharging blocking plate is in the retracted state, the waste discharging blocking plate is located on one side of the transmission path, and the outlet of the waste discharging unit is communicated with the inlet of the second conveyor roller group.

[0019] When the waste discharging blocking plate is in the blocking state, the waste discharging blocking plate is located inside the transmission path, and the outlet of the waste discharging unit is communicated with the inlet of the waste collection component.

[0020] With the above technical solution, when the waste bag is transferred to the first conveying roller group, the driving motor controls the eccentric wheel mechanism to rotate half a circle, so that the waste discharge baffle is inserted into the gap between the first conveying roller group and the second conveying roller group to block the transmission path of the bag. At this time, after the waste bag is transferred, it is blocked by the waste discharge baffle and the transmission path is changed and then falls onto the waste conveyor belt below. When the waste is discharged, the driving motor controls the eccentric wheel mechanism to continue to rotate half a circle, and the transmission connecting rod drives the waste discharge baffle to reset back to the contracted state. It has the advantages of simple and compact structure, high transmission efficiency, smooth movement and precise control. In addition, the inclined setting of the waste discharge baffle can provide a guide for the waste bag, which is more conducive to the discharge of the waste bag.

[0021] The embodiment of the present invention further discloses a waste discharge system for packaging bags, wherein the path switching component comprises an adjustable waste discharge roller group arranged between the first conveying roller group and the second conveying roller group.

[0022] The adjustable waste discharge roller group comprises a fixed rotating roller and an adjustable rotating roller, a transmission path for the packaging bags to pass through is provided between the fixed rotating roller and the adjustable rotating roller, and an adjusting driving mechanism is provided on one side of the adjustable rotating roller.

[0023] The adjusting driving mechanism is in driving connection with the adjustable rotating roller, and the adjusting driving mechanism can drive the adjustable rotating roller to move toward a side away from the fixed rotating roller, so that the adjustable waste discharge roller group can be switched between a conveying state and an interruption state.

[0024] When the adjustable rotating rollers are in a conveying state, the packaging bag passes through the adjustable waste discharge roller group from the first conveying roller group, and the outlet of the adjustable waste discharge roller group is connected to the inlet of the second conveying roller group.

[0025] When the adjustable rotating roller is in the interrupted state, the adjustable rotating roller is separated from the fixed rotating roller and is located at a side away from the fixed rotating roller, and the outlet of the adjustable waste discharge roller group is connected to the waste collection component.

[0026] With the above technical solution, the path switching component is set as an adjustable waste discharge roller group between the first conveying roller group and the second conveying roller group. When the qualified product packaging bag is conveyed, the qualified product packaging bag is sequentially conveyed through the first conveying roller group, the adjustable waste discharge roller group and the second conveying roller group. When the waste packaging bag is conveyed, the adjustable rotating roller in the adjustable waste discharge roller group moves toward the side away from the fixed rotating roller and interrupts the transmission path. At this time, the waste packaging bag is interrupted from passing through the first conveying roller group, and then conveyed toward the waste collection component, thereby realizing the waste discharge of the waste packaging bag. The setting of the adjustable waste discharge roller group has the advantages of wide adaptability and high flexibility. For example, when adjusting the packaging bag, there is no need to replace the structure of the waste discharge device, and only the spacing, speed or position of the adjustable waste discharge roller group needs to be adjusted.

[0027] Further preferably, the adjustment drive mechanism includes a drive motor and a swing transmission mechanism, one end of the swing transmission mechanism is rotationally connected to the drive motor, and the other end is transmission-connected to the adjustable rotating roller. When the waste packaging bag is transmitted along the transmission path to the upstream of the waste discharge unit, the control unit controls the drive motor to operate, and the drive motor drives the swing transmission mechanism to operate and links the adjustable rotating roller to swing in the direction away from the fixed rotating roller. At this time, the adjustable rotating roller is in an interrupted state, and the outlet of the adjustable waste discharge roller group is connected to the inlet of the second conveying roller group, and the packaging bags marked as waste packaging bags are discharged.

[0028] The adjusting driving mechanism includes a driving element and a linear transmission mechanism. One end of the linear transmission mechanism is connected to the driving motor, and the other end is connected to the adjustable rotating roller. When the waste packaging bag is transmitted along the transmission path to the upstream of the waste discharge unit, the control unit controls the driving motor to work, and the driving motor drives the linear transmission mechanism to move and links the adjustable rotating roller to move in the direction away from the fixed rotating roller. At this time, the adjustable rotating roller is in an interrupted state, and the outlet of the adjustable waste discharge roller group is connected to the inlet of the second transmission roller group, and the packaging bags marked as waste packaging bags are discharged.

[0029] The embodiment of the present invention also discloses a waste discharge system for packaging bags, wherein the waste collection component includes a waste conveyor belt disposed below the waste discharge device, and a waste discharge conveying motor is disposed on one side of the waste conveyor belt. When the waste packaging bags are discharged from the transmission path to the waste conveyor belt, the waste discharge conveying motor drives the waste conveyor belt to transmit and transfer the waste packaging bags to the waste area. Alternatively, the waste collection component includes a waste collection plate and a waste collection box, the waste collection plate is disposed below the path switching component and is connected to the outlet of the path switching component, the waste collection plate is disposed obliquely, and the outlet of the waste collection plate is connected to the waste collection box.

[0030] By adopting the above technical solution, a waste conveyor belt is provided to convey the removed waste packaging bags to the waste area, and a waste collecting plate is provided to transfer the removed waste packaging bags to the waste collection box.

[0031] The embodiment of the present invention further discloses a waste discharge system for packaging bags, wherein the detection component includes a first detector and a second detector arranged upstream of the waste discharge device.

[0032] The first detector includes a first camera arranged at the opening side of the packaging bag along the transmission path of the packaging bag. The first camera detects the appearance image of the handle part of each packaging bag on the transmission path one by one in real time.

[0033] The second detector includes a second camera arranged on both sides of the packaging bag along the transmission path of the packaging bag, and the second camera detects the appearance image of the side hot-sealed part of each packaging bag on the transmission path one by one in real time.

[0034] By adopting the above technical solution, the detection component is set as the first camera and the second camera, and the appearance images of the handle part and the side hot-sealed part of each packaging bag on the transmission path are detected one by one in real time, so that waste packaging bags can be detected in time.

[0035] The embodiment of the present invention further discloses a waste discharge system for packaging bags, wherein the judgment module judges and analyzes the appearance image of the handle part detected by the first camera and the appearance image of the handle part of a preset qualified product, and when the difference between the appearance image of the handle part and the appearance image of the handle part of a qualified product is greater than a preset value, the judgment module judges that the packaging bag is a waste packaging bag and transmits the calibration result to the control unit. Or:

[0036] The judgment module judges and analyzes the appearance image of the side hot-sealed part detected by the second camera and the appearance image of the side hot-sealed part of a preset qualified product. When the difference between the appearance image of the side hot-sealed part and the appearance image of the side hot-sealed part of a qualified product is greater than a preset value, the judgment module judges that the packaging bag is a waste packaging bag and transmits the calibration result to the control unit.

[0037] By adopting the above technical solution, when judging whether a packaging bag is a waste packaging bag, it is only necessary to compare and analyze the appearance image of each packaging bag with the appearance image of a preset qualified product. When the difference after the analysis and comparison is greater than the preset value, it is judged as a waste packaging bag and the calibration result is transmitted to the control unit. Furthermore, the present application focuses on the handle area and the side hot-sealed area where the probability of waste is the highest. When waste appears, it is calibrated and transmitted to the waste discharge device for discharge.

[0038] The embodiment of the present invention further discloses a waste discharge method for packaging bags, which is applied to any of the waste discharge systems for packaging bags described above, and the waste discharge method comprises:

[0039] The detection component obtains normal appearance images of the side seal and handle of the packaging bag respectively, and trains the model. The input information of the training model is the normal appearance image pre-collected by the detection component, and the output information of the training model is the image after denoising and optimization of the collected normal appearance image.

[0040] The judgment module extracts features from images of the side seals and handles of predetermined qualified packaging bags, extracts position features of the side seals and handles of qualified packaging bags, fits the features into a multi-point curve, and uses it as a calibration curve.

[0041] The detection component detects the appearance images of each packaging bag to be tested on the transmission path one by one in real time, and transmits the appearance images of each packaging bag to be tested to the judgment module. The judgment module extracts the features of the images of the side heat-sealing parts and handle parts of each packaging bag to be tested, extracts the positions of the side heat-sealing lines and handles of each packaging bag to be tested, and fits the corresponding position features of the packaging bag to be tested into a multi-point curve as the curve to be tested.

[0042] The judgment module judges the position difference between each point of the curve to be tested and each point of the calibrated curve. The judgment module sets a difference threshold and filters out the points in the curve to be tested that are greater than the difference threshold.

[0043] The judgment module judges whether there are more than 3 consecutive points whose position differences are greater than the difference threshold. If so, the calibration module calibrates the packaging bag as a defective packaging bag; or

[0044] The judgment module judges whether there are more than 5 non-consecutive points whose position differences are greater than the difference threshold. If so, the calibration module calibrates the packaging bag as a defective packaging bag.

[0045] If neither of the above two conditions is satisfied, calculate the confidence level of this point as a fault point according to the distance between the corresponding two points and the interval between the two points.

[0046] If the confidence level is higher than 70, judge the packaging bag as a defective packaging bag.

[0047] The calibration module calculates the number of packaging bags between the defective packaging bag and the waste discharging device on the transmission path as N, and calibrates the defective packaging bag as N + 1.

[0048] The calibration module transmits the calibration information of the defective packaging bag to the control unit. When the defective packaging bag is transmitted to the waste discharging unit along the transmission path, the control unit controls the waste discharging unit to act, so that the outlet of the path switching component is communicated with the waste collection component, and the calibrated defective packaging bag is discharged.

[0049] Adopting the above technical solution, the present application also provides a method for discharging waste of packaging bags. This method first establishes a training model through the judgment module and performs denoising optimization on the pre-collected normal appearance images, then extracts the features of the images, and fits them into a multi-point curve as the calibrated curve. During the waste judgment process, the appearance images of each packaging bag to be tested are also extracted for features and fitted into a multi-point curve as the curve to be tested, and then it is judged whether it is a defective packaging bag by judging the fitted curve, which has the advantages of high accuracy and high efficiency.

[0050] The embodiment of the present invention also discloses a method for discharging waste of packaging bags. The detection component collects multiple images of a single packaging bag to be tested each time; among them

[0051] The detection component collects images of the side heat-sealed parts of X sides of a single packaging bag to be tested each time. The judgment module extracts features from the images of the side heat-sealed parts of X sides and obtains X side curves to be tested, and corrects the X side curves to be tested to obtain corrected side curves to be tested.

[0052] The detection component collects images of the handle parts of Y sides of a single packaging bag to be tested each time. The judgment module extracts features from the images of the handle parts of Y sides and obtains Y handle curves to be tested, and corrects the Y handle curves to be tested to obtain corrected handle curves to be tested.

[0053] Adopting the above technical solution, the detection component collects multiple images of a single packaging bag to be tested each time, and corrects multiple curves to be tested corresponding to the multiple images to obtain corrected curves to be tested, further improving the accuracy.

[0054] The embodiment of the present invention also discloses a waste discharging method for packaging bags. The detection component further includes an infrared emitter and an infrared receiver arranged on both sides of the packaging bag. The infrared emitter emits infrared rays, and the infrared receiver receives the infrared rays and sends the infrared ray value to the judgment module.

[0055] The judgment module compares the received infrared ray value with a preset threshold:

[0056] If the deviation value between the infrared ray value and the preset threshold is ±10, it is judged that the packaging bag has no holes;

[0057] If the deviation value between the infrared ray value and the preset threshold is ±10 to ±20, it is judged that the packaging bag may have holes;

[0058] If the deviation value between the infrared ray value and the preset threshold is greater than ±20, it is judged that the packaging bag has holes and is judged as a waste packaging bag;

[0059] When it is judged that the packaging bag may have holes, according to the image data of the packaging bag collected by the camera, the image data is processed by using a color threshold algorithm. The preset RGB color threshold of the waste packaging bag is 100. If the RGB of the packaging bag is greater than 100, it is judged as a waste packaging bag.

[0060] Adopting the above technical solution, the infrared emitter and the infrared receiver can further detect whether there are holes in the packaging bag. The packaging bag with holes is also marked as a waste packaging bag, improving the detection accuracy of the packaging bag.

[0061] The beneficial effects of the present invention are:

[0062] The present invention discloses a waste discharging system applied to a bag making machine for packaging bags. The waste discharging system includes a waste discharging device and a detection and judgment device. The detection and judgment device detects and judges in real time whether each produced packaging bag is a waste packaging bag. If it is a waste packaging bag, the corresponding calibration information is sent to the waste discharging device. Specifically, in this application, a first camera and a second camera are set to respectively detect in real time and one by one the appearance images of the handle part and the side heat sealing part of each packaging bag on the transmission path, and then judge whether it is a waste packaging bag by comparing the appearance images.

[0063] The determined waste packaging bags are discharged through the waste discharging device. For the qualified packaging bags, normal conveying, sorting, packing, etc. are carried out. When the waste packaging bags pass through the waste discharging device, the path switching component on the waste discharging unit switches to connect the outlet and the waste collection component for discharging and collecting the waste packaging bags. The waste discharging system for packaging bags disclosed in this application can ensure that only products meeting the quality standards (qualified packaging bags) enter the market, which helps to improve the consistency and reliability of the produced packaging bags. And this waste discharging system is arranged on the transmission path of the packaging bags and can be realized by changing the path during waste discharging, without the need to additionally set a grasping mechanism for waste packaging bags, having the advantages of simple structure, convenient control and rapid response. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic structural diagram of the waste discharging device in the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention;

[0065] Figure 2 It is a schematic structural diagram of one specific structure of the path switching component in the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention;

[0066] Figure 3 It is a schematic structural diagram of one specific mechanism of the waste conveyor belt in the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention;

[0067] Figure 4 It is a working flow chart of the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention;

[0068] Figure 5 It is a flow chart of one waste discharging method of the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention;

[0069] Figure 6 It is a flow chart of judging whether there is a hole in the waste discharging method of the waste discharging system of the bag making machine for packaging bags provided by an embodiment of the present invention.

[0070] Description of the reference numerals:

[0071] 100, the first conveyor roller group;

[0072] 110, First driving conveyor roller; 120, First driven conveyor roller; 130, Driving roller motor; 140, Conveyor gear; 150, Conveyor belt;

[0073] 200, Waste discharging unit;

[0074] 210, Driving motor; 220, Eccentric wheel mechanism; 230, Transmission connecting rod; 240, Waste discharging stop plate; 250, Mounting seat; 260, Guide rail; 270, Moving block;

[0075] 300, Second conveyor roller group;

[0076] 310, Second driving conveyor roller; 320, Second driven conveyor roller;

[0077] 400, Waste product conveyor belt;

[0078] 410, Waste discharging conveyor motor; 420, Conveyor belt baffle;

[0079] 500, Detection component;

[0080] 510, First camera; 520, Second camera;

[0081] 600, Judgment module; 700, Calibration module; 800, Control unit. Specific implementation manners

[0082] In production and life, packaging bags are often used. Common types of packaging bags include non-woven bags, woven belts, plastic bags, etc. Taking non-woven bags as an example, non-woven bags have the characteristics of environmental protection and practicality. With the development of non-woven bags in China in recent years, three-dimensional bags with stronger three-dimensional sense have become the mainstream of non-woven bags. Existing non-woven three-dimensional bags are formed by a three-dimensional bag forming machine in one step. During processing, a flat non-woven fabric needs to be pressed into a cuboid through a die lifting device. During the forming process of existing three-dimensional bag forming machines, waste products may occur. The parts with the highest waste product rate are concentrated in the handle bag part and the side heat-sealing part. Common waste product problems are that the handle bag is not bonded, the handle bag is damaged, the side part is heat-sealed and damaged, or the side part is not bonded.

[0083] However, existing non-woven bag making machines (as well as other related packaging bag making machines) do not have a waste discharging system or device. When waste packaging bags appear, only manual inspection or manual picking out of waste packaging bags can be used, which increases the labor intensity and also reduces the production efficiency. There are also some bag making machines that do not perform waste product detection or inspection and pack them together uniformly. After waste packaging bags are found during use, they are removed or discarded without use. However, after this situation occurs, if the waste packaging bags are not excluded, it will reduce the brand reputation and consumer trust.

[0084] Therefore, to solve the above technical problems and improve the performance of the bag-making machine, the present application discloses a waste discharging system and a waste discharging method for packaging bags dedicated to a paper bag machine. The waste discharging method for packaging bags can judge, confirm and calibrate defective packaging bags, and the waste discharging system can accurately and quickly discharge the defective packaging bags, ensuring that the packaging bags after production and packing are all qualified packaging bags, and ensuring that only qualified packaging bags meeting the quality standards enter the market, thereby improving the competitiveness of the products and the recognition and trust of consumers.

[0085] It should be noted that the waste discharging system and the waste discharging method for packaging bags disclosed in the present application can be applied or adapted to various products related to packaging bags, such as production machines for paper bags, non-woven bags, plastic bags, cartons, etc. The present application does not specifically limit the application and use scenarios of the waste discharging system and the waste discharging method.

[0086] Next, a detailed explanation and description of the waste discharging system and the waste discharging method for packaging bags disclosed in the present application will be given:

[0087] Embodiment 1

[0088] The embodiment of this embodiment discloses a waste discharging system for packaging bags. This waste discharging system can be applied to a bag-making machine for packaging bags. The waste discharging system includes a waste discharging device and a detection and judgment device. The waste discharging device and the detection and judgment device are communicatively connected. Specifically, the waste discharging unit in the waste discharging device is communicatively connected to the detection and judgment device.

[0089] The waste discharging device includes a first conveyor roller group 100, a waste discharging unit 200, and a second conveyor roller group 300 that are sequentially arranged along the transmission path of the packaging bag. Among them, the first conveyor roller group 100 and the second conveyor roller group 300 are used to convey the packaging bag along the transmission path and each includes at least two conveyor rollers; and the waste discharging unit 200 includes a path switching component and a waste collection component. The inlet of the path switching component is communicated with the outlet of the first conveyor roller group 100, and the outlet of the path switching component is switchably communicated with the inlet of the waste collection component or the second conveyor roller group 300.

[0090] Specifically, in this embodiment, the first conveyor roller group 100 and the second conveyor roller group 300 are arranged at intervals along the transmission path. Both the first conveyor roller group 100 and the second conveyor roller group 300 include at least two conveyor rollers. The two conveyor rollers are closely attached to each other and can rotate relative to each other to convey the packaging bags forward. There is a transmission path for the packaging bags between the two conveyor roller groups. It should be noted that since the waste discharging device disclosed in this application includes the first conveyor roller group 100 and the second conveyor roller group 300, and the first conveyor roller group 100 and the second conveyor roller group 300 can only convey the folded and flattened packaging bags, the waste discharging device is arranged downstream of the bag folding device in the packaging bag making machine, between the bag folding device and the bag arranging device, to discharge the waste packaging bags after folding before the packaging bags are conveyed to the bag arranging device. And because the conveyed packaging bags are folded and flattened at this time, it is more convenient to perform waste discharging treatment.

[0091] However, those skilled in the art should understand that the waste discharging device can also be arranged at other positions for waste discharging. For example, it can be arranged between the forming device and the bag folding device of the packaging bag. Since there is a three-dimensional bag transmission channel between the forming device and the bag folding device, and the three-dimensional bag transmission channel is used to convey the formed three-dimensional packaging bags to the bag folding device, arranging the waste discharging device in the three-dimensional bag transmission channel can discharge the three-dimensional packaging bags. At this time, the waste discharging device can be arranged as a waste discharging plate, a waste discharging mechanical claw, etc. to discharge the calibrated waste packaging bags.

[0092] More specifically, in this embodiment, the path switching component can be various structures such as an adjusting roller, a waste discharging side plate, etc. that can switch or change the transmission path. The inlet of the path switching component is communicated with the outlet of the first conveyor roller group 100. When the qualified packaging bags are being normally conveyed, the outlet of the path switching component is communicated with the inlet of the second conveyor roller group 300 and then conveyed along the transmission path to the bag arranging device for bag arranging. When the calibrated waste packaging bags are conveyed to the first conveyor roller group 100, the inlet of the second conveyor roller group 300 is cut off, and the outlet of the path switching component is communicated with the inlet of the waste collection component, so as to achieve waste discharging treatment. That is to say, the outlet of the path switching component in this application is switchably and unidirectionally communicated with the inlet of the waste collection component or the second conveyor roller group 300.

[0093] The detection and judgment device includes an information detection unit and an information processing unit. The information detection unit includes a detection component 500 arranged upstream of the waste discharging device along the transmission path. The detection component 500 detects the detection information of each packaging bag on the transmission path one by one in real time. The detection information includes the appearance information of the handle part of the packaging bag and the appearance information of the side heat-sealing part, and transmits the detection information of each packaging bag to the information processing unit. The information processing unit includes a judgment module 600 and a calibration module 700. The judgment module 600 judges whether the packaging bag is a waste packaging bag according to the detection information of each packaging bag. When the judgment module 600 judges that the packaging bag is a waste packaging bag, the calibration module 700 calibrates the waste packaging bag and transmits the calibration result to the control unit 800.

[0094] The control unit 800 controls the switching of the outlet of the path switching component according to the calibration result. When the qualified packaging bag is conveyed to the waste discharging unit 200 along the transmission path, the outlet of the path switching component is communicated with the inlet of the second conveying roller group 300. When the packaging bag calibrated as a waste packaging bag is conveyed to the waste discharging unit 200 along the transmission path, the outlet of the path switching component is communicated with the waste collection component.

[0095] Specifically, in this embodiment, the detection component 500 can be any one of common detection instruments such as a camera, an infrared sensor, a radar, etc. Taking the setting of a camera as an example, the appearance image or video image of the packaging bag can be obtained. Taking the setting of a radar as an example, the radar can also obtain the appearance image of the packaging bag. And the detection component 500 disclosed in this application detects at least the appearance information of the handle part of the packaging bag and the appearance information of the side heat-sealing part. Therefore, at least two detection components 500 can be preferably set to respectively detect the appearance information of the handle part of the packaging bag and the appearance information of the side heat-sealing part, or 3 can be set. For example, one detection component 500 is arranged on each of the left and right sides of the packaging bag on the transmission path to detect the appearance information of the two side heat-sealing parts, and one detection component 500 is arranged at the position corresponding to the handle part to detect the appearance information of the handle part. Those skilled in the art can set the specific number of detection components 500 according to actual needs, such as setting 4, 5 or even more to improve the detection accuracy. This embodiment does not make specific limitations on this.

[0096] When the judgment module 600 determines whether a packaging bag is a defective one based on the detection information of each packaging bag, it can use color analysis method for judgment, judging the attribute or state based on the color difference in the image of the packaging bag; it can also use shape analysis method for judgment, identifying the shape contour in the image of the packaging bag to judge whether it meets the standard of qualified products; it can also use feature analysis method for judgment, judging the state by analyzing the specific features (such as side lines, handle bags) of the objects in the image of the packaging bag to determine whether it is a defective packaging bag, or it can use machine learning method for judgment, training a large number of labeled packaging bag image data with machine learning algorithms so that the model can learn the feature differences between qualified products and defective ones. Those skilled in the art can also set other methods according to actual needs or comprehensively use more than two methods in combination to judge whether it is a defective packaging bag, and this embodiment does not make specific limitations on this.

[0097] In summary, the present application discloses a waste discharging system applied to a bag making machine for packaging bags. The waste discharging system includes a waste discharging device and a detection and judgment device. The detection and judgment device detects and judges in real time whether each produced packaging bag is a defective one. If it is detected and judged to be a defective packaging bag, the corresponding calibration information is sent to the waste discharging device, and the waste discharging device performs waste discharging treatment on the defective packaging bag, while the qualified packaging bags are subjected to normal conveying, sorting, packing, etc., so as to ensure that only qualified packaging bags are sorted in the bag sorting device at the end. The waste discharging system for packaging bags disclosed in the present application can ensure that only products meeting the quality standards (qualified packaging bags) enter the market, which helps to improve the consistency and reliability of the produced packaging bags.

[0098] Furthermore, the waste discharging system for packaging bags disclosed in the present application can be automatically detected by the detection and judgment device, and the waste discharging device and the detection and judgment device are communicatively connected. The whole system has a high degree of intelligence and automation, solving the problem that the existing bag making machine for packaging bags cannot perform detection and waste discharging and can only perform waste discharging by manual selection or detection, and has the advantages of high efficiency and high automation.

[0099] And in the waste discharging system disclosed in the present application, the waste discharging unit 200 is arranged between the first conveying roller group 100 and the second conveying roller group 300 on the transmission path of the packaging bag. The qualified packaging bags are normally conveyed and transferred between the first conveying roller group 100 and the second conveying roller group 300. Only when a defective packaging bag passes through, the path switching component on the waste discharging unit 200 switches to connect the outlet and the waste collection component to perform waste discharging and collection of the defective packaging bag.

[0100] Furthermore, an implementation of an embodiment of the present invention also discloses a waste discharge system for packaging bags, wherein the waste discharge unit 200 includes a control unit 800, and the path switching component includes a waste discharge drive component and a waste discharge stop component, the waste collection component includes a waste conveyor belt 400 located at the outlet of the waste discharge stop component, the control unit 800 is communicated with the detection and judgment device, and controls the action of the waste discharge drive component according to the calibration result, the waste discharge drive component can drive the waste discharge stop component to reciprocate toward the transmission path, wherein, when the packaging bag calibrated as a waste packaging bag is transmitted to the path switching component along the transmission path, the waste discharge drive component drives the waste discharge stop component to move toward the transmission path, and the outlet of the waste discharge stop component is connected to the inlet of the waste conveyor belt 400.

[0101] Specifically, in the present embodiment, the control unit 800 may be a single chip microcomputer, a PLC controller, a control chip, etc., and the waste discharge drive component may be configured as a waste discharge motor and a screw mechanism, or a waste discharge motor and a gear rack, or a waste discharge motor and a cam mechanism, or a waste discharge motor and a crank slider mechanism. For example, when configured as a waste discharge motor and a screw mechanism, the transmission screw and the waste discharge motor are connected in transmission, and the screw slider and the waste discharge stop component are fixedly connected. When the drive motor drives the transmission screw to reciprocate, the screw slider can drive the waste discharge stop component to reciprocate along the length direction of the transmission screw, thereby realizing The waste discharge stop component now reciprocates toward the transmission path, and then switches between cutting off the transmission path and exiting the transmission path. When the packaging bag marked as a waste packaging bag is transmitted to the path switching component along the transmission path, the drive motor drives the transmission screw to rotate and links the screw slider to move. The screw slider drives the waste discharge stop component to move toward the transmission path and cut off the transmission path, so that the outlet of the waste discharge stop component is connected to the inlet of the waste conveyor belt 400 and waste is discharged. Similarly, it can be understood that when the drive motor and other structures cooperate, the reciprocating rotation of the drive motor is converted into linear movement of the waste discharge stop component.

[0102] In another preferred implementation, the waste discharge drive component can also be directly set as a linear drive component, for example, a linear motor and an output rod, a drive cylinder and an output rod, etc., and the linear drive component can drive the waste discharge stop component to achieve reciprocating linear motion. This embodiment does not make specific limitations on this.

[0103] With this structural design, the control unit 800 can control the operation of the waste discharge drive component according to the calibration result of the waste packaging bag transmitted by the calibration module 700, and realize the waste packaging bag passing to the waste collection component. The waste discharge system is arranged on the transmission path of the packaging bag, and can be realized by changing the path when discharging waste, without the need to set up an additional grabbing mechanism for the waste packaging bag, and has the advantage of simple structure.

[0104] See further Figure 1, in one preferred implementation of this embodiment, the first conveyor roller group 100 and the second conveyor roller group 300 are arranged at intervals along the transmission path. The waste discharging unit 200 is arranged between the intervals of the first conveyor roller group 100 and the second conveyor roller group 300.

[0105] Please refer to Figure 2 , the waste discharging driving component includes a driving motor 210, an eccentric wheel mechanism 220 and a transmission connecting rod 230. The eccentric wheel mechanism 220 is in transmission connection with the output end of the driving motor 210. One end of the transmission connecting rod 230 is rotatably connected to the eccentric wheel mechanism 220, and the other end is rotatably connected to the waste discharging blocking component; the waste discharging blocking component includes a waste discharging baffle 240, and the waste discharging baffle 240 is obliquely arranged.

[0106] Specifically, in this embodiment, a plurality of weight reduction holes are arranged at intervals on the eccentric wheel mechanism 220. Through the design of this structure, the material and weight of the eccentric wheel mechanism 220 can be reduced. Further, when the driving motor 210 rotates and drives the eccentric wheel mechanism 220 to rotate half a circle, the eccentric wheel mechanism 220 can drive the transmission connecting rod 230 to move forward, and the transmission connecting rod 230 drives the waste discharging baffle 240 to move towards the transmission path and cut off the moving path. When the driving motor 210 continues to drive the eccentric wheel mechanism 220 to rotate half a circle, the eccentric wheel mechanism 220 can drive the transmission connecting rod 230 to move backward, and the transmission connecting rod 230 drives the waste discharging baffle 240 to move away from the transmission path to make way, so that the packaging bag can move from the first conveyor roller group 100 towards the entrance of the second conveyor roller group 300.

[0107] Therefore, in this application, by setting the eccentric wheel mechanism 220, when the driving motor 210 drives the eccentric wheel mechanism 220 to rotate, the transmission connecting rod 230 and the waste discharging baffle 240 can reciprocate and switch between the retracted state and the blocking state. The driving motor 210 only needs to rotate in the same normal direction, and there is no need for the driving motor 210 to switch to reciprocating rotation. Moreover, setting the eccentric wheel mechanism 220 can also perform intermittent reciprocating swinging, and the intermittent swinging time can be adjusted by controlling the rotation speed of the motor.

[0108] Further, when the waste discharge baffle 240 is in the blocking state, the waste discharge baffle 240 is located within the transmission path, blocking the transmission path. When the waste product packaging bag is transmitted from the outlet of the first conveyor roller group 100, when the packaging bag moves to the waste discharge baffle 240, it is blocked by the waste discharge baffle 240 and changes direction, and the waste product packaging bag moves towards the inlet of the waste collection assembly. Therefore, in this embodiment, the waste discharge baffle 240 is inclined, and the angle between the waste discharge baffle 240 and the horizontal direction is preferably set between 60° and 80°, such as 60°, 75°, 80°, etc. When the waste product packaging bag contacts the waste discharge baffle 240, the inclined waste discharge baffle 240 plays a guiding role, guiding the waste product packaging bag to move downward and be discharged.

[0109] The waste discharge unit 200 further includes a mounting seat 250. The mounting seat 250 is arranged on the frame. The drive motor 210 is fixedly arranged on one side of the mounting seat 250. A guide rail 260 is arranged on the mounting seat 250. A moving block 270 that is adapted to the guide rail 260 and can move is arranged on the waste discharge baffle 240. The arrangement of the guide rail 260 and the moving block 270 can improve the stability of the waste discharge baffle 240 when it moves.

[0110] The waste discharge baffle 240 can be switched between a retracted state and a blocking state. When the waste discharge baffle 240 is in the retracted state, the waste discharge baffle 240 is located on one side of the transmission path, and the outlet of the waste discharge unit 200 is communicated with the inlet of the second conveyor roller group 300.

[0111] When the waste discharge baffle 240 is in the blocking state, the waste discharge baffle 240 is located within the transmission path, and the outlet of the waste discharge unit 200 is communicated with the inlet of the waste collection assembly.

[0112] With this structural design, when the waste product packaging bag is transmitted to the first conveyor roller group 100, the drive motor 210 controls the eccentric wheel mechanism 220 to rotate half a turn, so that the waste discharge baffle 240 is inserted into the gap between the first conveyor roller group 100 and the second conveyor roller group 300 to block the transmission path of the packaging bag. At this time, after the waste product packaging bag is transmitted, it is blocked by the waste discharge baffle 240 and changes its path and then falls onto the lower waste conveyor belt 400. When the waste discharge is completed, the drive motor 210 controls the eccentric wheel mechanism 220 to continue rotating half a turn, and the transmission connecting rod 230 will drive the waste discharge baffle 240 to reset to the retracted state. It has the advantages of simple and compact structure, high transmission efficiency, stable movement and precise control. And the inclined setting of the waste discharge baffle 240 can provide a guiding effect for the waste product packaging bag, which is more conducive to the discharge of the waste product packaging bag.

[0113] More specifically, please refer to Figure 1 , for a simple description of the setting structure and transmission method of the first conveyor roller group 100 and the second conveyor roller group 300 in this embodiment:

[0114] The first conveyor roller group 100 includes a first driving conveyor roller 110 and a first driven conveyor roller 120. The second conveyor roller group 300 includes a second driving conveyor roller 310 and a second driven conveyor roller 320. The first driving conveyor roller 110 is located below the first driven conveyor roller 120, and the second driving conveyor roller 310 is located below the second driven conveyor roller 320. There are channels for conveying the packaging bags between the first driving conveyor roller 110 and the first driven conveyor roller 120, and between the second driving conveyor roller 310 and the second driven conveyor roller 320. A driving assembly is also provided on the side of the first conveyor roller group 100 and the second conveyor roller group 300. The driving assembly includes a driving roller motor 130, a transmission gear 140, and a transmission belt 150. The driving roller motor 130 drives the transmission gear 140 to rotate. The transmission belt 150 is wound around the transmission gear 140, the first driving conveyor roller 110, the first driven conveyor roller 120, the second driving conveyor roller 310, and the second driven conveyor roller 320 in sequence. And the transmission directions of the transmission belt 150 on the first driving conveyor roller 110 and the first driven conveyor roller 120, and on the second driving conveyor roller 310 and the second driven conveyor roller 320 are opposite, so that the corresponding two conveyor rollers rotate in opposite directions and convey the packaging bags.

[0115] Further referring to Figure 1 and Figure 3 The waste collection assembly includes a waste conveyor belt 400 disposed below the waste discharging device. A waste discharging conveyor motor 410 is provided on one side of the waste conveyor belt 400. When the waste packaging bag is discharged from the transmission path to the waste conveyor belt 400, the waste discharging conveyor motor 410 drives the waste conveyor belt 400 to convey, and conveys the waste packaging bag to the waste area. A motor for driving the waste conveyor belt 400 to convey is also provided on one side of the waste conveyor belt 400. The conveying direction of the waste conveyor belt 400 is perpendicular to the conveying direction of the packaging bag, and conveyor belt baffles 420 are provided on both sides in the length direction of the waste conveyor belt 400.

[0116] Alternatively, in another preferred implementation, the waste collection assembly includes a waste collection plate and a waste collection box. The waste collection plate is disposed below the path switching assembly and is communicated with the outlet of the path switching assembly. The waste collection plate is disposed obliquely, and the outlet of the waste collection plate is communicated with the waste collection box.

[0117] With the design of the above structure, setting the waste conveyor belt 400 can convey the discharged waste packaging bags to the waste area, and setting the waste collection plate can transfer the discharged waste packaging bags to the waste collection box.

[0118] Next, a specific description of the detection component 500 disclosed in this embodiment will be given. The detection component 500 can be a radar, a camera, a sensor, etc. The detection component 500 includes a first detector and a second detector disposed upstream of the waste discharging device.

[0119] The first detector includes a first camera 510 disposed on the opening side of the packaging bag along the transmission path of the packaging bag. The first camera 510 detects in real time the appearance images of the handle parts of each packaging bag on the transmission path one by one.

[0120] The second detector includes a second camera 520 disposed on both sides of the packaging bag along the transmission path of the packaging bag. The second camera 520 detects in real time the appearance images of the side heat-sealing parts of each packaging bag on the transmission path one by one.

[0121] With this structural design, the detection component 500 is set as the first camera 510 and the second camera 520, and respectively detects in real time the appearance images of the handle parts and the side heat-sealing parts of each packaging bag on the transmission path one by one, so as to detect defective packaging bags in time.

[0122] The embodiment of the present invention also discloses a waste discharging system for packaging bags. Please refer to Figure 4 , the judgment module 600 first judges and analyzes the appearance image of the handle part detected by the first camera 510 and the appearance image of the handle part of a preset qualified product. When the difference between the appearance image of the handle part and the appearance image of the handle part of the qualified product is greater than the preset value, the judgment module 600 judges that the packaging bag is a defective packaging bag and transmits the calibration result to the control unit 800 through the calibration module 700. Or

[0123] The judgment module 600 judges and analyzes the appearance image of the side heat-sealing part detected by the second camera 520 and the appearance image of the side heat-sealing part of a preset qualified product. When the difference between the appearance image of the side heat-sealing part and the appearance image of the side heat-sealing part of the qualified product is greater than the preset value, the judgment module 600 judges that the packaging bag is a defective packaging bag and transmits the calibration result to the control unit 800 through the calibration module 700, and the control unit 800 controls the waste discharging unit 200 to perform waste discharging treatment.

[0124] Specifically, in this embodiment, when the judgment module 600 judges and analyzes the appearance image of the side heat-sealing part detected by the second camera 520 and the appearance image of the side heat-sealing part of a preset qualified product, various different judgment and analysis methods can be adopted. For example:

[0125] The shape analysis method can be used for judgment. When using the shape analysis method for judgment, the three-dimensional contour analysis method can be specifically adopted, and the judgment is carried out by analyzing and processing the three-dimensional contour information of the packaging bag image. For example, first, noise reduction, filtering and other processing are carried out on the appearance images of the side heat-sealing part and the handle part to improve the data quality, and then the edges of the appearance images of the side heat-sealing part and the handle part are detected and the contours are tracked. Specifically, scanning or modeling methods can be used for processing. When it is judged that there are obvious errors in the packaging bag to be tested, such as the absence of a handle bag or the rupture of the side heat-sealing line, it is judged as a waste packaging bag.

[0126] The machine learning method can also be used for judgment. The machine learning algorithm is used to train a large number of labeled packaging bag image data, so that the model can learn the characteristic differences between qualified products and waste products. It can also be judged in the way of combining the machine learning method with the shape analysis method, or combining the machine learning method with the feature analysis method. This embodiment does not make specific limitations on this.

[0127] With this design of the scheme, when judging whether a packaging bag is a waste packaging bag, only the appearance image of each packaging bag needs to be compared and analyzed with the appearance image of the preset qualified product. When the difference after the analysis and comparison is greater than the preset value, it is judged as a waste packaging bag and the calibration result is transmitted to the control unit 800. Further, this application focuses on the handle part and the side heat-sealing part with the highest probability of waste products. After waste products appear, they are calibrated and transmitted to the waste discharging device for waste discharging.

[0128] Finally, a simple description is given of the working process of the waste discharging system of the packaging bag disclosed in this embodiment on the bag making machine:

[0129] For example, when the bag making machine manufactures packaging bags, the production and manufacturing speed of the packaging bags is constant. Taking the example that the bag making machine produces 60 packaging bags per minute for illustration:

[0130] After the raw materials of the packaging bag are transported into the bag making machine, they are cut into rectangular sheets of corresponding size and length, and then the handle is heat-sealed on the sheet, and then it is continuously transported for side insertion molding and side heat-sealing. The first camera 510 for detecting the appearance image of the handle part is arranged downstream of the handle heat-sealing area, and the second camera 520 for detecting the appearance image of the side heat-sealing part is arranged downstream of the heat-sealing part area. The formed three-dimensional packaging bag is further transported to the bag folding device, and the bag folding device folds and flattens the three-dimensional packaging bag for subsequent sorting and packing and transportation. After passing through the bag folding device, it passes through the waste discharging device. At the waste discharging device, the qualified packaging bags continue to be transported to the bag sorting device for sorting and then are packed by the packing machine, while the waste packaging bags are discharged by the waste discharging device.

[0131] Since multiple packaging bags are produced in a pipeline on the production line inside the bag-making machine during the production process, the detection and judgment device detects and judges in real time whether each produced packaging bag is a defective one. Specifically, for example, after the 1st packaging bag is produced, detection starts. The first camera 510 that detects the appearance image of the handle part and the second camera 520 that detects the appearance image of the side heat-sealing part detect the appearance image and judge whether it is a qualified product. Then the 2nd packaging bag is produced, and it is detected and judged as a qualified product. The 3rd packaging bag is produced, and it is detected and judged as a qualified product. The 4th packaging bag is produced, and it is detected and judged as a qualified product. When the 5th packaging bag is detected as a defective one, for example, when the first camera 510 that detects the appearance image of the handle part detects the corresponding image and transmits it to the judgment module 600, and the judgment module 600 judges that the handle is not heat-sealed, the packaging bag is marked as a defective one. However, at this time, the defective packaging bag is upstream of the waste discharging device, and there are still multiple packaging bags being transmitted between it and the waste discharging device. For example, there are 4 packaging bags being transmitted between the position where the defective packaging bag is located and the waste discharging device at this time. At this time, the calibration module 700 calibrates the defective packaging bag as the 5th packaging bag. When the 5th packaging bag is transmitted to the waste discharging device, the outlet of the path switching component is communicated with the waste collection component to perform waste discharging treatment on the defective packaging bag. The other packaging bags on the production line and transmission path of the bag-making machine are produced or transported normally.

[0132] The implementation manner of this embodiment also discloses a waste discharging method for packaging bags. This waste discharging method is applied to the waste discharging system for packaging bags in any of the above items. Please refer to Figure 4 and Figure 5 , and the waste discharging method includes:

[0133] The detection component 500 respectively obtains normal appearance images for the side heat-sealing part and the handle part of the packaging bag, and trains a model. The input information of the trained model is the normal appearance images pre-collected by the detection component 500, and the output information of the trained model is the image after denoising and optimization of the collected normal appearance images.

[0134] Specifically, in this embodiment, when the detection component 500 obtains normal appearance images of the side heat-sealing part and the handle part of the packaging bag, it is preferably to obtain images of multiple packaging bags at one time. For example, obtain appearance images of 10, 20, or 30 packaging bags at one time. For example, pre-collect 20 qualified packaging bags and try to obtain pictures under different angles and lighting conditions to increase the diversity of the data set. Ensure that the pictures are clear so that the model can accurately identify the features of the packaging bag. Then crop all the pictures to the same size and adjust the resolution to fit the model. Use methods such as flipping, rotating, scaling, and color adjustment to increase the number of pictures and improve the generalization ability of the model. When denoising the appearance photos, various common denoising methods such as median filtering denoising and Gaussian filtering denoising can be used. Those skilled in the art can select according to actual needs, and this embodiment does not make specific limitations on this.

[0135] The judgment module 600 extracts features from the images of the side heat-sealing part and the handle part of the predetermined qualified packaging bag, extracts the positions of the side heat-sealing line and the handle of the qualified packaging bag, fits the positions into a multi-point curve, and uses it as a calibration curve.

[0136] Specifically, in this embodiment, when extracting features from the images of the side heat-sealing part and the handle part of the packaging bag, the number of extracted features can be the same or different. For example, 30, 40, 50 or even more features can be extracted, or the number of feature points extracted from the side heat-sealing part can be more than that of the handle part. This embodiment does not make specific limitations on this.

[0137] Further, when extracting features from the images of the side heat-sealing part and the handle part of the packaging bag, first enhance the images, adjust the contrast, brightness, etc. of the images to make the image features more prominent for subsequent processing. Then standardize the images, standardize the image size, color space, etc. to ensure the consistency of the input data. Then, features can be extracted based on different features such as color features, texture features, shape features, key-point features, etc. For example, extract the color histogram, color moment, etc. of the image to describe the global color distribution of the image, use methods such as gray-level co-occurrence matrix (GLCM), local binary pattern (LBP), gray-level difference statistics, etc. to extract the texture features of the image, and extract the shape features in the image such as straight lines, circles, etc. through edge detection (such as Canny, Sobel edge detectors) and Hough transform, and then extract through deep learning methods. For example, use a convolutional neural network to automatically learn the multi-level feature representation of the image through structures such as multiple convolutional layers, pooling layers, and fully connected layers, and can extract features from low-level to high-level, such as edges, textures, shapes, objects, etc. After extracting a large number of features, feature selection may be required to select the most useful and representative feature subset. Feature selection can reduce the amount of calculation, improve the generalization ability of the model, and avoid overfitting.

[0138] Finally, when fitting multiple extracted feature points into a curve, the least squares method can be used for fitting. For example, fitting can be performed in ways such as straight line fitting, circle fitting, ellipse fitting, etc., or methods such as polynomial fitting and curve interpolation fitting can be used. More specifically, programming processing can also be performed using computer languages such as Python and Java. This embodiment does not make specific limitations in this regard.

[0139] The detection component 500 detects the appearance images of each packaging bag to be tested on the transmission path one by one in real time, and transmits the appearance images of each packaging bag to be tested to the judgment module 600. The judgment module 600 extracts features from the images of the side heat-sealing part and the handle part of each packaging bag to be tested, extracts the positions of the side heat-sealing lines and the handles of each packaging bag to be tested, and fits the positions of the packaging bags to be tested into a multi-point curve and uses it as the curve to be tested.

[0140] The judgment module 600 judges the position gap between each point of the curve to be tested and each point of the calibrated curve. The judgment module 600 sets a gap threshold and screens out the points in the curve to be tested that are greater than the gap threshold.

[0141] The judgment module 600 judges whether there are more than 3 consecutive points with a position gap greater than the gap threshold. If so, the calibration module 700 calibrates the packaging bag as a defective packaging bag; or

[0142] The judgment module 600 judges whether there are more than 5 discontinuous points with a position gap greater than the gap threshold. If so, the calibration module 700 calibrates the packaging bag as a defective packaging bag.

[0143] It should be noted that in this embodiment, the appearance images of the training model and the appearance image of the packaging bag to be measured preferably select the same perspective and appearance, and the number of feature points extracted from the appearance images of the training model and the packaging bag to be measured is the same, and the method of fitting multiple feature points into a curve is also the same. In this way, when the packaging bag to be measured is a qualified product, for example, the measured curve fitted at the handle part should be basically coincident with the calibration curve or the difference is within a certain range. When a defective packaging bag appears, for example, the handle is not heat-sealed, the feature points at the corresponding handle part in the fitted curve will mutate, or when one side of the side heat-sealing part is not heat-sealed, the feature points at the corresponding heat-sealing edge part in the fitted curve will also mutate, so as to accurately and quickly judge whether the packaging bag is qualified or has problems. And calibrate the defective packaging bag.

[0144] More specifically, in this embodiment, the judgment module 600 can also judge that there are more than 3 consecutive points in the fitted curve, for example, judge 4, 5 or more consecutive points. When judging that the interval points are greater than the gap threshold, it can be 6, 7, 8 or even more. Further, the gap threshold can be set or taken as the distance between the feature point and the calibration curve. For example, the preset distance is 30. When it is greater than 30, it is judged that the point and the point on the calibration curve are greater than the gap threshold. Those skilled in the art can adjust or design according to actual needs, and this embodiment does not make specific limitations in this regard.

[0145] If the above two conditions are not satisfied, calculate the confidence level that this point is a fault point according to the distance between the corresponding two points and the interval between the two points. If the confidence level is higher than 70, judge the packaging bag as a defective packaging bag. It should be noted that those skilled in the art can also set the confidence level to 65, 80 or other values, and this embodiment does not make specific limitations in this regard.

[0146] The calibration module 700 calculates the number of packaging bags between the defective packaging bag and the waste discharging device on the transmission path as N, and calibrates the defective packaging bag as N + 1.

[0147] Specifically, in this embodiment, for example, when the number of packaging bags between the defective packaging bag and the waste discharging device on the transmission path is 5, the defective packaging bag is calibrated as 6, and when the 6th packaging bag is transmitted to the waste discharging device, waste discharging treatment is carried out, or when the number of packaging bags between the defective packaging bag and the waste discharging device on the transmission path is 3, the defective packaging bag is calibrated as 4, and when the 4th packaging bag is transmitted to the waste discharging device, waste discharging treatment is carried out.

[0148] More specifically, it can also start counting from the production of the first packaging bag, and then sequentially count the 2nd, 3rd, 4th, 5th,... up to the Nth packaging bag. When the Mth packaging bag is a defective packaging bag, the Mth packaging bag is marked and excluded. By using such a method, it is also possible to count the total number of packaging bags and calculate the yield rate of the packaging bags.

[0149] The calibration module 700 transmits the calibration information of the defective packaging bag to the control unit 800. When the defective packaging bag is transported to the waste discharge unit 200 along the transport path, the control unit 800 controls the waste discharge unit 200 to act, so that the outlet of the path switching component is communicated with the waste collection component, and the calibrated defective packaging bag is excluded.

[0150] The present application provides a waste discharge method for packaging bags. First, the judgment module 600 establishes a training model and denoises and optimizes the pre-collected normal appearance images, then extracts features from the images, and fits the extracted multiple feature points into a multi-point curve as the calibration curve. During the waste judgment process, the appearance images of each packaging bag to be tested are also feature-extracted and fitted into a multi-point curve as the curve to be tested. Then, the curve to be tested and the calibration curve are judged and analyzed to determine whether it is a defective packaging bag, which has the advantages of high accuracy and high efficiency.

[0151] An embodiment of the present invention also discloses a waste discharge method for packaging bags. The detection component 500 collects multiple images of a single packaging bag to be tested each time; wherein

[0152] The detection component 500 collects X images of the side heat-sealed parts of a single packaging bag to be tested each time. The judgment module 600 extracts features from the X images of the side heat-sealed parts to obtain X side curves to be tested, and corrects the X side curves to be tested to obtain the corrected side curves to be tested.

[0153] The detection component 500 collects Y images of the handle parts of a single packaging bag to be tested each time. The judgment module 600 extracts features from the Y images of the handle parts to obtain Y handle curves to be tested, and corrects the Y handle curves to be tested to obtain the corrected handle curves to be tested.

[0154] Specifically, for example, the number of images of the side heat-sealing part and the handle part of a single packaging bag to be detected on each side can be the same or different. For example, the number of X can be 3, 4, 5, 6, etc., and the number of Y can be 4, 3, 5, 6, etc. Those skilled in the art can set according to actual needs. It should be noted that both X and Y should be set as positive integers greater than 2 to avoid misjudgment caused by image errors when only detecting one image. With this design of the solution, the detection component 500 collects multiple images of a single packaging bag to be detected each time, and corrects multiple measured curves corresponding to the multiple images to obtain corrected measured curves, further improving the accuracy rate.

[0155] Further preferably, the information processing unit obtains the corrected measured curve formula for X images of the side part as follows:

[0156]

[0157] The information processing unit obtains the corrected measured curve formula for Y images of the handle part as follows:

[0158]

[0159] It should be noted that represents the correction process for X images of the side part, where is one of the formulas for obtaining the measured curve by fitting using the least squares method, and n1 + … + n x is the average calculation of X deviation values. For example, when correcting 4 images of the side part, the corrected deviation value should be That is, the deviation values of 4 images are averaged to reduce errors. represents the correction for Y images of the handle part, where n1 + … + n y is the average calculation of Y deviation values. For example, when correcting 5 images of the handle part, the corrected deviation value should be That is, the deviation values of 5 images or 5 measured curves are averaged to reduce errors, thereby avoiding problems such as errors or large deviation values when detecting a single image.

[0160] The embodiment of the present invention also discloses a waste discharging method for packaging bags. The detection component 500 further includes an infrared emitter and an infrared receiver arranged on both sides of the packaging bag. Please refer to Figure 6 , the infrared emitter emits infrared rays, and the infrared receiver receives the infrared rays and sends the infrared ray value to the judgment module 600.

[0161] The judgment module 600 compares the received infrared ray value with a preset threshold:

[0162] If the deviation value between the infrared ray value and the preset threshold value is ±10, it is judged that the packaging bag has no holes. For example, when the deviation value between the infrared ray value and the preset threshold value is 8 or -7, it is judged that the packaging bag has no holes.

[0163] If the deviation value between the infrared ray value and the preset threshold value is ±10 to ±20, it is judged that the packaging bag may have holes. For example, when the deviation value between the infrared ray value and the preset threshold value is 15 or -17, it is judged that the packaging bag may have holes and needs to be further processed and judged by the color threshold algorithm.

[0164] If the deviation value between the infrared ray value and the preset threshold value is greater than ±20, it is judged that the packaging bag has holes and the packaging bag is judged as a waste packaging bag. For example, when the deviation value between the infrared ray value and the preset threshold value is 30 or -45, it is judged that the packaging bag has holes and is marked as a waste packaging bag.

[0165] When it is judged that the packaging bag may have holes, according to the image data of the packaging bag collected by the camera, the image data is processed by the color threshold algorithm. The preset RGB color threshold of the waste packaging bag is 100. If the RGB of the packaging bag is greater than 100, it is judged as a waste packaging bag. It should be noted that there are 256 color levels in total for RGB. For example, when the RGB of the packaging bag is 50 or 60, it is judged as a qualified packaging bag, and when the RGB is 160 or 200, it is judged as a waste packaging bag.

[0166] Adopting the above technical solution, the infrared emitter and the infrared receiver can further detect whether there are holes in the packaging bag, and the packaging bag with holes is also marked as a waste packaging bag, improving the detection accuracy of the packaging bag.

[0167] In summary, the present invention discloses a waste discharging system applied to a bag making machine for packaging bags. The waste discharging system includes a waste discharging device and a detection and judgment device. The detection and judgment device detects and judges in real time whether each produced packaging bag is a waste packaging bag. If it is a waste packaging bag, the corresponding calibration information is sent to the waste discharging device. Specifically, in this application, the first camera 510 and the second camera 520 are set to respectively detect in real time and one by one the appearance images of the handle part and the side heat-sealing part of each packaging bag on the transmission path, and then judge whether it is a waste packaging bag by comparing the appearance images.

[0168] The determined waste packaging bags are discharged through the waste discharging device. For the qualified packaging bags, normal conveying, sorting, packing, etc. are carried out. When the waste packaging bags pass through the waste discharging device, the path switching component on the waste discharging unit 200 switches to connect the outlet with the waste collection component for discharging and collecting the waste packaging bags. The waste discharging system of the packaging bags disclosed in this application can ensure that only products meeting the quality standards (qualified packaging bags) enter the market, which helps to improve the consistency and reliability of the produced packaging bags. And this waste discharging system is arranged on the transmission path of the packaging bags and can be achieved by changing the path during waste discharging, without the need to additionally set a grasping mechanism for the waste packaging bags, having the advantage of simple structure.

[0169] Finally, the working process of the waste discharging system disclosed in this embodiment is described:

[0170] After the raw materials of the packaging bags are conveyed into the bag making machine, they are cut into rectangular sheets of corresponding size and length. Then the handles are heat-sealed on the sheets, and the conveyance continues for side insertion forming and heat-sealing the sides. Among them, the first camera 510 for detecting the appearance image of the handle part is arranged downstream of the handle heat-sealing area, and the second camera 520 for detecting the appearance image of the side heat-sealing part is arranged downstream of the heat-sealing part area. The formed three-dimensional packaging bags are further conveyed to the bag folding device, and the bag folding device folds and flattens the three-dimensional packaging bags for subsequent sorting and packing and transportation. After passing through the bag folding device, they pass through the waste discharging device. At the waste discharging device, the qualified packaging bags continue to be conveyed to the bag sorting device for sorting and then are packed by the packing machine, while the waste packaging bags are discharged by the waste discharging device.

[0171] Because multiple packaging bags are produced in a pipeline manner on the production line inside the bag making machine during the production process, the detection and judgment device detects and judges in real time whether each produced packaging bag is a waste packaging bag. Specifically, for example, starting from the first packaging bag for detection and judgment, first extract the features of the images of the side heat-sealing part and the handle part of the first packaging bag and fit them into a curve to be measured, and then judge with the calibration curve of the qualified packaging bag. When it is judged that it is not a waste packaging bag, the conveyance continues, and then the second, third, and fourth packaging bags are detected. The qualified packaging bags are normally detected and transported, and they are also normally conveyed when passing through the waste discharging device. When the first camera 510 for detecting the appearance image of the handle part detects the image of the fifth packaging bag and transmits it to the judgment module 600 and it is judged that the handle is not heat-sealed, this packaging bag is calibrated as a waste packaging bag. However, at this time, the waste packaging bag is upstream of the waste discharging device, and there are still 4 packaging bags conveyed between it and the waste discharging device. At this time, the calibration module 700 calibrates this waste packaging bag as the fifth packaging bag. When the fifth packaging bag is conveyed to the waste discharging device, the outlet of the path switching component is connected with the waste collection component to carry out waste discharging treatment on the waste packaging bag. The pipeline of the bag making machine and other packaging bags on the transmission path are normally produced or conveyed.

[0172] Example 2

[0173] The implementation mode of this embodiment also discloses a waste discharging system for packaging bags. It should be noted that, compared with the waste discharging system for packaging bags disclosed in Embodiment 1, the difference of the waste discharging system for packaging bags disclosed in this embodiment lies only in the structure and setting of the path switching component, and other structures and waste discharging methods are the same as those in Embodiment 1. Therefore, other structures and waste discharging methods will not be elaborated here, and only the path switching component will be described in detail in this embodiment:

[0174] Specifically, in this embodiment, the path switching component includes an adjustable waste discharging roller group arranged between the first conveying roller group and the second conveying roller group. It should be noted that when the adjustable waste discharging roller group is arranged between the first conveying roller group and the second conveying roller group, the distance therebetween should be at least greater than the length of the packaging bag, and preferably, the first conveying roller group and the second conveying roller group are arranged in a movable and adjustable manner. For example, when the length of the packaging bag is 40 cm, the distance between the first conveying roller group and the second conveying roller group is set to 45 cm, 50 cm, etc.

[0175] The adjustable waste discharging roller group includes a fixed rotating roller and an adjustable rotating roller. There is a transmission path for the packaging bag to pass between the fixed rotating roller and the adjustable rotating roller, and an adjustment driving mechanism is arranged on one side of the adjustable rotating roller.

[0176] The adjustment driving mechanism is in transmission connection with the adjustable rotating roller, and the adjustment driving mechanism can drive the adjustable rotating roller to move towards the side away from the fixed rotating roller, so that the adjustable waste discharging roller group can be switched between the conveying state and the interruption state.

[0177] When the adjustable rotating roller is in the conveying state, the packaging bag passes through the adjustable waste discharging roller group from the first conveying roller group, and the outlet of the adjustable waste discharging roller group is communicated with the inlet of the second conveying roller group. In the conveying state, the packaging bag passes through the first conveying roller group, the adjustable waste discharging roller group and the second conveying roller group in sequence and then continues to be conveyed backward.

[0178] When the adjustable rotating roller is in the interruption state, the adjustable rotating roller is separated from the fixed rotating roller and is located on the side away from the fixed rotating roller, and the outlet of the adjustable waste discharging roller group is communicated with the waste collection component. The packaging bag passes through the first conveying roller group and the adjustable waste discharging roller group in sequence, and then enters the waste collection component.

[0179] With this structural design, the path switching component is set as an adjustable waste discharge roller group between the first conveying roller group and the second conveying roller group. When the qualified product packaging bag is conveyed, the qualified product packaging bag continues to be conveyed through the first conveying roller group, the adjustable waste discharge roller group and the second conveying roller group in sequence. When the waste packaging bag is conveyed, the adjustable rotating roller in the adjustable waste discharge roller group moves toward the side away from the fixed rotating roller and interrupts the transmission path. At this time, the waste packaging bag is interrupted from passing through the first conveying roller group, and then conveyed toward the waste collection component, thereby realizing the waste disposal of the waste packaging bag. The setting of the adjustable waste discharge roller group has the advantages of wide adaptability and high flexibility. For example, when adjusting the packaging bag, there is no need to replace the structure of the waste discharge device, and only the spacing, speed or position of the adjustable waste discharge roller group needs to be adjusted.

[0180] Further preferably, the adjustment drive mechanism includes a drive motor and a swing transmission mechanism, one end of the swing transmission mechanism is rotationally connected to the drive motor, and the other end is transmission-connected to the adjustable rotating roller. When the waste packaging bag is transmitted along the transmission path to the upstream of the waste discharge unit, the control unit controls the drive motor to operate, and the drive motor drives the swing transmission mechanism to operate and links the adjustable rotating roller to swing in the direction away from the fixed rotating roller. At this time, the adjustable rotating roller is in an interrupted state, and the outlet of the adjustable waste discharge roller group is connected to the inlet of the second conveying roller group, and the packaging bags marked as waste packaging bags are discharged.

[0181] Specifically, in the present embodiment, the swing transmission mechanism can be configured as a swing connecting rod, a crank rocker mechanism, a cam (eccentric wheel) mechanism, etc. The swing transmission mechanism can convert the rotation of the drive motor into the swing of the swing transmission mechanism, and drive the adjustable rotating roller to swing. When the adjustable rotating roller swings in the direction away from the fixed rotating roller, the adjustable rotating roller is located obliquely below the fixed rotating roller. At this time, when the waste packaging bag is transmitted to the first conveying roller group, because the adjustable waste discharge roller group is in an interrupted state at this time, and the length of the packaging bag is less than the distance between the first conveying roller group and the second conveying roller group, the waste packaging bag will be transmitted to the adjustable rotating roller and then transmitted to the waste collection component.

[0182] The adjusting driving mechanism includes a driving element and a linear transmission mechanism. One end of the linear transmission mechanism is connected to the driving motor, and the other end is connected to the adjustable rotating roller. When the waste packaging bag is transmitted along the transmission path to the upstream of the waste discharge unit, the control unit controls the driving motor to work, and the driving motor drives the linear transmission mechanism to move and links the adjustable rotating roller to move in the direction away from the fixed rotating roller. At this time, the adjustable rotating roller is in an interrupted state, and the outlet of the adjustable waste discharge roller group is connected to the inlet of the second transmission roller group, and the packaging bags marked as waste packaging bags are discharged.

[0183] Specifically, in this embodiment, the driving element can be a driving motor, or a driving cylinder, a linear motor, etc. For example, when the driving element is set as a driving motor, the linear transmission mechanism can be set as a conveyor belt mechanism, a rack and pinion mechanism, a lead screw mechanism, etc. When the driving element is set as a driving cylinder, a linear motor, etc., the linear transmission mechanism can be a guide rail, a guide groove, etc. When the adjustable rotating roller moves away from the fixed rotating roller, the adjustable rotating roller is located directly below the fixed rotating roller. At this time, when the waste packaging bag is transmitted to the first conveyor roller group, since the adjustable waste discharging roller group is in an interrupted state at this time, and the length of the packaging bag is less than the distance between the first conveyor roller group and the second conveyor roller group, the waste packaging bag will be transmitted to the adjustable rotating roller at this time, and then transmitted into the waste collection assembly.

[0184] It should be noted that other structures and waste discharging methods in the waste discharging system of the packaging bag disclosed in this embodiment are the same as those in Embodiment 1, so they will not be elaborated in this embodiment.

[0185] It should be noted that in addition to the embodiments of the present invention described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details are included in the above description. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0186] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0187] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0188] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0189] In the description of this embodiment, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0190] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A waste discharge system for packaging bags, characterized in that: It includes a waste discharge device and a detection and judgment device, and the waste discharge device and the detection and judgment device are communicatively connected; wherein The waste discharge device comprises a first conveying roller group, a waste discharge unit and a second conveying roller group which are sequentially arranged along the transmission path of the packaging bag, wherein the first conveying roller group and the second conveying roller group are used to convey the packaging bag along the transmission path, and each comprises at least two conveying rollers; and the waste discharge unit comprises a path switching component and a waste collection component, wherein the inlet of the path switching component is connected to the outlet of the first conveying roller group, and the outlet of the path switching component is switchably connected to the inlet of the waste collection component or the inlet of the second conveying roller group; The detection and judgment device includes an information detection unit and an information processing unit; wherein, the information detection unit includes a detection component arranged upstream of the waste discharge device along the transmission path, and the detection component detects the detection information of each packaging bag on the transmission path one by one in real time, and the detection information includes the appearance information of the handle part of the packaging bag and the appearance information of the side hot-sealing part, and transmits the detection information of each packaging bag to the information processing unit; the information processing unit includes a judgment module and a calibration module, and the judgment module judges whether the packaging bag is a waste packaging bag according to the detection information of each packaging bag, and when the judgment module judges that the packaging bag is a waste packaging bag, the calibration module calibrates the waste packaging bag and transmits the calibration result to the control unit; wherein The control unit controls the outlet of the path switching component to switch according to the calibration result. When the qualified packaging bag is transmitted to the waste discharge unit along the transmission path, the outlet of the path switching component is connected to the inlet of the second transmission roller group; when the packaging bag calibrated as the waste packaging bag is transmitted to the waste discharge unit along the transmission path, the outlet of the path switching component is connected to the waste collection component; wherein The waste discharge unit includes the control unit, and the path switching component includes a waste discharge driving component and a waste discharge stopping component, the waste collection component includes a waste conveyor belt located at the outlet of the waste discharge stopping component, the control unit is in communication with the detection and judgment device, and controls the movement of the waste discharge driving component according to the calibration result, and the waste discharge driving component can drive the waste discharge stopping component to reciprocate toward the transmission path; wherein When the packaging bag marked as the waste packaging bag is transmitted to the path switching component along the transmission path, the waste discharge driving component drives the waste discharge stopping component to move toward the transmission path, and the outlet of the waste discharge stopping component is connected to the inlet of the waste conveyor belt.

2. The waste discharge system of the packaging bag according to claim 1, characterized in that: The first conveying roller group and the second conveying roller group are arranged at intervals along the conveying path; The waste discharge driving component comprises a driving motor, an eccentric wheel mechanism and a transmission connecting rod, wherein the eccentric wheel mechanism is transmission-connected to the output end of the driving motor, one end of the transmission connecting rod is rotationally connected to the eccentric wheel mechanism, and the other end is rotatably connected to the waste discharge stopping component; the waste discharge stopping component comprises a waste discharge stopping plate, and the waste discharge stopping plate is tilted; in The waste discharge unit further comprises a mounting seat, the mounting seat is arranged on the frame, the driving motor is fixedly arranged on one side of the mounting seat, a guide rail is arranged on the mounting seat, and a movable block adapted to the guide rail and movable is arranged on the waste discharge baffle; and The waste discharge baffle can be switched between a retracted state and a stop state. When the waste discharge baffle is in the retracted state, the waste discharge baffle is located at one side of the transmission path, and the outlet of the waste discharge unit is connected to the inlet of the second conveying roller group; When the waste discharge stop plate is in the stopping state, the waste discharge stop plate is located within the transmission path, and the outlet of the waste discharge unit is communicated with the inlet of the waste collection assembly.

3. The waste discharge system for packaging bags according to any one of claims 1 to 2, characterized in that: The waste collection assembly includes a waste conveyor belt disposed below the waste discharge device, and a waste discharge conveying motor is disposed on one side of the waste conveyor belt. When the waste packaging bag is discharged from the transmission path to the waste conveyor belt, the waste discharge conveying motor drives the waste conveyor belt to transmit the waste packaging bag to the waste area; or The waste collection assembly includes a waste collection plate and a waste collection box. The waste collection plate is arranged below the path switching assembly and is connected to the outlet of the path switching assembly. The waste collection plate is arranged obliquely, and the outlet of the waste collection plate is connected to the waste collection box.

4. The waste discharge system of the packaging bag according to claim 3, characterized in that: The detection component includes a first detector and a second detector disposed upstream of the waste discharge device; wherein The first detector comprises a first camera disposed at the opening side of the packaging bag along the transmission path of the packaging bag, and the first camera detects the appearance image of the handle part of each packaging bag on the transmission path one by one in real time; The second detector includes a second camera disposed on both sides of the packaging bag along the transmission path of the packaging bag, and the second camera detects the appearance image of the side hot-sealed part of each packaging bag on the transmission path one by one in real time.

5. The waste discharge system for packaging bags according to claim 4, characterized in that: The judgment module judges and analyzes the appearance image of the handle part detected by the first camera and the appearance image of the handle part of a preset qualified product. When the difference between the appearance image of the handle part and the appearance image of the handle part of a qualified product is greater than a preset value, the judgment module judges that the packaging bag is a waste packaging bag and transmits the calibration result to the control unit; or The judgment module judges and analyzes the appearance image of the side hot-sealed part detected by the second camera and the appearance image of the side hot-sealed part of a preset qualified product. When the difference between the appearance image of the side hot-sealed part and the appearance image of the side hot-sealed part of a qualified product is greater than a preset value, the judgment module judges that the packaging bag is a waste packaging bag and transmits the calibration result to the control unit.

6. A method for discharging waste from packaging bags, characterized in that: The waste discharge method is applied to the waste discharge system of the packaging bag according to any one of claims 1 to 5, and the waste discharge method comprises: The detection component obtains normal appearance images of the side hot seal part and the handle part of the packaging bag respectively, and trains a model, wherein the input information of the training model is the normal appearance image pre-collected by the detection component, and the output information of the training model is an image after denoising and optimization of the collected normal appearance image; The judgment module extracts features from the images of the side hot seal area and the handle area of ​​the predetermined qualified packaging bag, extracts the position features of the side hot seal line and the handle of the qualified packaging bag, fits the features into a multi-point curve, and uses it as a calibration curve; The detection component detects the appearance image of each package bag to be tested on the transmission path one by one in real time, and transmits the appearance image of each package bag to be tested to the judgment module, the judgment module extracts features from the images of the side hot seal portion and the handle portion of each package bag to be tested, extracts the position of the side hot seal line and the handle of each package bag to be tested, and fits the position of each package bag to be tested into a multi-point curve as the curve to be tested; The judging module judges the position difference between each point of the curve to be measured and each point of the calibration curve, sets a difference threshold, and selects points in the curve to be measured that are greater than the difference threshold; The judging module judges whether there are more than three consecutive points whose position differences are greater than the difference threshold, and if so, the marking module marks the packaging bag as a waste packaging bag; or The judging module judges whether there are discontinuous but more than 5 points with a position difference greater than the difference threshold, and if so, the marking module marks the packaging bag as a waste packaging bag; If neither of the above two conditions is met, the confidence that the point is a fault point is calculated based on the distance between the two corresponding points and the interval between the two points; If the confidence level is higher than 70, the packaging bag is judged to be a waste packaging bag; The calibration module calculates the number of packaging bags between the waste packaging bag and the waste discharge device on the transmission path as N, and calibrates the waste packaging bag as N+1; The calibration module transmits the calibration information of the waste packaging bag to the control unit. When the waste packaging bag is transmitted to the waste discharge unit along the transmission path, the control unit controls the operation of the waste discharge unit so that the outlet of the path switching component is connected to the waste collection component and the calibrated waste packaging bag is discharged.

7. The method for disposing waste from packaging bags according to claim 6, characterized in that: The detection component collects multiple images of a single packaging bag to be detected each time; in The detection component collects X images of the side hot-sealed parts of a single package bag to be tested each time, the judgment module extracts features from the X images of the side hot-sealed parts and obtains X side curves to be tested, and corrects the X side curves to be tested to obtain the side corrected curves to be tested; The detection component collects Y images of the handle part of a single packaging bag to be tested each time, the judgment module extracts features from the Y images of the handle part and obtains Y handle test curves, and corrects the Y handle test curves to obtain the corrected handle test curves.

8. The method for disposing waste from packaging bags according to claim 7, characterized in that: The detection component further includes an infrared transmitter and an infrared receiver disposed on both sides of the packaging bag, wherein the infrared transmitter transmits infrared rays, and the infrared receiver receives the infrared rays and sends infrared ray values ​​to the judgment module; The judgment module compares the received infrared value with a preset threshold value: If the deviation between the infrared value and the preset threshold is ±10, it is determined that the packaging bag has no holes; If the deviation between the infrared value and the preset threshold is ±10 to ±20, it is determined that the packaging bag may have a hole; If the deviation between the infrared value and the preset threshold is greater than ±20, it is determined that the packaging bag has a hole and is a waste packaging bag; When it is determined that the packaging bag may have holes, the image data of the packaging bag is collected by the camera, and the image data is processed using a color threshold algorithm. The RGB color threshold of the waste packaging bag is preset to 100. If the RGB of the packaging bag is greater than 100, it is determined to be a waste packaging bag.

Images