Control method of packaging equipment

Abstract

The invention discloses a control method of packaging equipment. The control method is used for solving the problems that a bag opening of a packaging bag is not completely opened and the fault tolerance of a control process is poor. According to the method, on the basis of hardware comprising a multi-stage bag opening mechanism, a control process is constructed through four states including normal definition, successful bag discharging, abnormal bag discharging and abnormal bag sealing. After an instruction is received, three-stage collaborative bag opening actions of airflow expansion, front-back limiting and front-side adsorption and front pulling are executed in sequence, and state skipping is conducted according to a result; and performing bag sealing in a successful bag discharging state. The method integrates an automatic retry mechanism of bag hooking and sealing links, and pauses and reports when abnormity occurs. According to the scheme, through cooperation of control logic and hardware, reliable opening of the bag opening and intelligent fault tolerance of the process are achieved, the bag opening success rate is increased to 99.9% or above, and the automation degree and reliability of packaging operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of automated packaging equipment technology, and in particular to a control method for packaging equipment. Background Technology

[0002] With the rapid development of e-commerce and the express delivery industry, the requirements for the efficiency and quality of product packaging are increasing. Currently, a "Smart Express Bag Labeling, Sealing, and Packaging Integrated Packaging Machine" disclosed in Chinese Patent Publication No. CN111703639A has emerged on the market. This equipment integrates functions such as bag placement, traction, labeling, and sealing, achieving a certain degree of automation in the packaging process. However, in practical applications, this existing technology still has some shortcomings.

[0003] Firstly, in the process of opening the bag opening, the existing technology mainly relies on the bag-supporting mechanism to mechanically expand the bag opening from both sides, combined with downward air blowing to try to blow the bag opening open. For bag openings with softer materials, stronger electrostatic adsorption, or smaller size, the front side of the bag opening often cannot be opened effectively and stably, and the bag opening is prone to not being stretched open or not fully opened.

[0004] Furthermore, regarding control methods for packaging equipment, international patents exist, such as CN106414248A, which proposes a control method for exclusive access authorization of actuators based on operating states. This scheme solves the problem of untraceable operating resource states when multiple process sequences conflict by defining multiple operating states and exclusively assigning access authorization to a single process sequence. However, this scheme focuses on addressing access permission management at the control logic level and does not address automatic recovery mechanisms for failures during packaging process execution (such as bag hooking failure or sealing obstruction), nor does it consider how to improve the success rate of bag opening through the synergy of hardware structure and control methods.

[0005] Therefore, how to further improve the success rate of opening packaging bags by coordinating control methods and hardware structures based on existing technologies, introduce an automatic recovery mechanism for abnormalities in the packaging process, and optimize the ease of maintenance in terms of hardware structure has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a control method for packaging equipment to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a control method for a packaging device, the packaging device comprising a sealing station plate, an airflow bag opening mechanism disposed on the upper side of the sealing station plate, a left and right bag supporting mechanism disposed below the airflow bag opening mechanism, a front bag supporting mechanism that can move horizontally back and forth and is disposed on the front side of the sealing operation station, and a heat sealing knife disposed on the sealing operation station; the control method comprises the following steps: Define at least two operating states, including normal state, bag successfully dispensing state, bag dispensing abnormal state, and bag sealing abnormal state; After receiving the bag-opening instruction from the host computer, the following bag-opening actions are executed in sequence; The airflow opening mechanism is controlled to generate a downward ion airflow, causing the opening of the continuous packaging bag to expand; The left and right bag-supporting mechanisms are controlled to limit the front and back positions of the left and right sides of the continuous packaging bag from both sides. Control the front bag-supporting mechanism to move forward, and open the front side wall of the continuous packaging bag to a preset position; The system will jump to the corresponding state based on the result of the bag-opening action. If the bag opening action is successfully executed, the bag will be successfully dispensed. If the bag opening action fails, the bag exit abnormal state will be entered. Upon receiving a sealing instruction in the state of successful bag dispensing, the sealing action is executed, and the system jumps to the corresponding state based on the result of the sealing action. When the bag exiting or sealing process enters an abnormal state, the task execution is paused and a fault code is reported. The process can only return to normal after a recovery command is received.

[0008] The control method for the packaging equipment of the present invention, wherein the step of controlling the front bag-supporting mechanism to move forward and opening the front sidewall of the continuous packaging bag to a preset position specifically includes: The negative pressure suction nozzle located on the front bag support mechanism is controlled to adsorb the front side wall of the continuous packaging bag; The clamping module is controlled to clamp the front sidewall after adsorption; The control drive module drives the negative pressure suction nozzle and the clamping module to move forward synchronously to the preset position.

[0009] The control method for the packaging equipment of the present invention, wherein the step of controlling the clamping module to clamp the adsorbed front sidewall body includes: The control swing drive unit drives the movable clamping arm to swing, so that its clamping part and the clamping part of the fixed clamping arm fit together, thereby clamping the front sidewall.

[0010] The control method for the packaging equipment of the present invention includes the step of controlling the left and right bag-supporting mechanisms to limit the front and rear positions of the left and right sides of the continuous packaging bag from the left and right sides, comprising: Before the airflow opening mechanism generates ion airflow, the swing arms in the left and right bag supporting mechanism are controlled to swing downward to a first angle to preliminarily position the front and back positions of the left and right ends of the continuous packaging bag. Before the heat sealing knife is controlled to seal the bag, the swing arm is controlled to swing downward to a second angle to tighten the bag to the left and right sides, wherein the second angle is greater than the first angle.

[0011] The control method for the packaging equipment of the present invention further includes a bag-hooking action in the bag-opening action, and the control method further includes: If the hook bag action fails, repeat the hook bag action; If the repetition count reaches the first preset threshold and still fails, it is marked as a hook bag abnormality and enters the bag exit abnormality state.

[0012] The control method for the packaging equipment of the present invention further includes: During the process of the heat sealing knife moving towards the sealing position, the status of the anti-pressure sensor located on the movable end of the front bag support mechanism is monitored in real time. If the pressure sensor is triggered, the movable end of the front support bag mechanism is controlled to retract and the support plate is driven to shake to relieve the pressure. Repeat the sealing process. If the number of repetitions reaches the second preset threshold and still triggers the pressure sensor, it will be marked as a sealing abnormality and enter a sealing abnormality state.

[0013] The control method for the packaging equipment of the present invention further includes a labeling mechanism disposed above and behind the sealing station plate, the labeling mechanism being assembled via a movable bracket capable of opening longitudinally forward or closing longitudinally backward; the control method further includes: Before the airflow opening mechanism generates an ion airflow, the labeling mechanism is controlled to attach the label to the continuous packaging bag.

[0014] The control method for the packaging equipment of the present invention, wherein the step of controlling the labeling mechanism to affix the label to the continuous packaging bag includes: The control belt drive motor drives the base belt take-up roller to rotate, so that the fabric belt is conveyed from the fabric belt feed roller through the fabric belt tension roller to the fabric stripping plate; When the face sheet tape passes the front end of the face sheet peeling plate, the face sheet peels off from the waste material base tape. The movable pressure head of the control label pressing module moves downward to press the peeled label onto the continuous packaging bag.

[0015] The control method for the packaging equipment of the present invention further includes: The left and right positions of the continuous packaging bags are detected by an anti-deviation detection mechanism located at the upper end of the sealing operation station; if the continuous packaging bags are detected to be moving in a skewed manner, an alarm will be issued or the machine will be stopped.

[0016] The control method for the packaging equipment of the present invention further includes a communication step for data interaction with a host computer, wherein the communication step adopts the following frame format: Send a command frame, the command frame including a frame start code, command sequence number, function code, command code, length, data field and CRC check code; Receive a response frame, the response frame including a frame start code, command sequence number, function code, response code, length, data field and CRC check code; Actively send a notification frame, the notification frame including frame start code, command sequence number, function code, notification code, length, data field and CRC check code; Heartbeat packets are sent periodically. If no response is received from the host computer for several consecutive heartbeat cycles, the communication link is determined to be abnormal.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Deep synergy between structure and method: This invention combines a three-level collaborative bag opening structure (airflow bag opening mechanism, left and right end front and rear limit, front side bag support mechanism) with precise control timing. In particular, the front side bag support mechanism uses negative pressure adsorption and clamping module to precisely pull the front of the bag opening to the preset position, which significantly improves the success rate of opening the bag opening of soft, electrostatic packaging bags.

[0018] 2. State Machine and Anomaly Recovery Mechanism: This invention defines explicit operating states (normal state, successful bag dispensing state, abnormal bag dispensing state, and abnormal bag sealing state) in its control method, and designs a limited retry and automatic recovery mechanism for abnormal situations such as bag hooking failure and sealing pressure triggering. Compared with existing technologies that only solve access permission conflicts, this invention further solves the problem of automatic recovery after process execution failure, improving the robustness of the equipment.

[0019] 3. Convenience design for maintenance: The labeling mechanism is assembled with a flip-open movable bracket and corresponding control steps, which allows operators to easily replace consumables and troubleshoot faults.

[0020] 4. Reliable communication protocol: It defines complete command frame, response frame, and notification frame structures, and combines them with a heartbeat mechanism to ensure the reliability and real-time performance of communication between the host computer and the device. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an overall bird's-eye view of the present invention.

[0023] Figure 2 This is an overall top view of the present invention.

[0024] Figure 3 yes Figure 2 AA sectional view.

[0025] Figure 4 yes Figure 3 Enlarged view of a local structure.

[0026] Figure 5 This is a further internal structural diagram of the present invention.

[0027] Figure 6 yes Figure 5 Enlarged view of a local structure.

[0028] Figure 7 yes Figure 6 Enlarged view of a local structure.

[0029] Figure 8 yes Figure 6 The bottom view in the image.

[0030] Figure 9 This is an isolated structural diagram of the front support bag mechanism of the present invention.

[0031] Figure 10 yes Figure 9 A bottom view. Detailed Implementation

[0032] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0035] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0037] like Figures 1 to 10 As shown, the present invention provides a packaging device that aims to solve technical problems in the prior art, such as low bag opening rate, lack of abnormal recovery mechanism in control methods, and inconvenient maintenance of labeling mechanism. This device has a high degree of integration and can realize a series of automated packaging processes, including automatic feeding of continuous packaging bags, reliable bag opening, label affixing, sealing, and cutting.

[0038] The packaging equipment includes a fixed support frame that provides overall support. This frame has a base 101 with wheels for easy movement and positioning. A protective housing 102 is fixedly mounted on the upper end of the base 101. The front, upper, and lower ends of the protective housing 102 are open, forming the main frame of the equipment. A square sealing station plate 2A (with a heat-sealing knife 600 positioned horizontally on the sealing station plate 2A) is vertically mounted on the open front side of the protective housing 102, and its front sidewall is configured as the main workstation for sealing operations. Inside the protective housing 102, below the feed rollers (described later), is an industrial control host 2B. Its components are integrated within the chassis for coordinating the operation of all mechanisms within the equipment.

[0039] To facilitate the automated process of the equipment, this device is equipped with a continuous bag feeding mechanism 200, which includes a feeding roller 201, a feeding drive motor 202 (an encoder records the distance of its rotation, which is fed back to the host computer to determine the forward position of the continuous bag), and a conveying roller group 203 for synchronously conveying and tightening the continuous bags 1000'. The feeding drive motor 202 is configured to drive the feeding roller 201 and the conveying roller group 203 on the discharge side of the conveying roller 2031 to rotate. There are generally two conveying rollers 2031, which roll and adhere to each other vertically to ensure continuous feeding of the continuous bags 1000'. A recessed step portion 103 is formed on the upper rear side of the protective housing 102, which is used to install the continuous bag roll 1000, which serves as the feeding roller. Specifically, support seats 1031 are provided on the left and right horizontal side walls of the stepped portion 103. The support seats 1031 are provided with slots 104 with the opening facing upward. The two ends of the feeding roller are rotatably engaged in the slots 104. This design allows the feeding roller to rotate freely in the slots 104 to realize the unwinding supply of the packaging bag, and also facilitates quick removal and replacement from above when the material roll is used up.

[0040] To prevent the packaging bags from skewing during transport, an anti-skewing detection mechanism is installed at the upper end of the sealing operation station. In one specific embodiment, this anti-skewing detection mechanism includes two position detection sensors 105 arranged side-by-side. The front wall of the continuous packaging bag 1000' typically has a straight sealing line mark printed on it. When the packaging bag is transported, the two position detection sensors 105 detect the left and right positions of this mark line. If the detection signals from the two position detection sensors 105 are not synchronized, it is determined that the packaging bag is skewed, and the control system immediately issues an alarm or stops the machine to ensure the accuracy of subsequent operations.

[0041] To achieve efficient and reliable opening of the bag opening, this equipment is equipped with a multi-stage coordinated bag-opening mechanism, including an airflow bag-opening mechanism 300, left and right bag-opening mechanisms 400, and a front bag-opening mechanism 500. These three mechanisms work in a specific sequence, forming the core hardware foundation of the bag-opening control method of this invention. The airflow bag-opening mechanism 300 is specifically elongated and horizontally positioned along the upper edge of the sealing station plate 2A. This mechanism generates a downward ionizing airflow, which is blown downward from the front of the sealing station plate 2A into the opening of the continuous bag 1000'. The airflow causes the bag opening to expand initially, while the ionizing airflow effectively eliminates static electricity generated by friction in the bag, preventing the bag opening from sticking together and creating favorable conditions for subsequent mechanical bag opening.

[0042] The left and right bag-supporting mechanisms 400 are located below the airflow bag-opening mechanism 300 and are used to tension the continuous packaging bags to the left and right sides from the left and right sides. In one specific embodiment, the left and right bag-supporting mechanisms 400 include two swing arms 401, which are located on the left and right sides of the sealing station plate 2A respectively and rotate in the longitudinal plane in the left and right direction. Each swing arm 401 is rotatably connected to the sealing station plate 2A through a deflection shaft 402 arranged in the front and back direction and passing through the front and rear side walls of the sealing station plate 2A. The bag-supporting motor 403 is fixed on the rear side wall of the sealing station plate 2A, and its output end is connected to the deflection shaft 402 for driving the deflection shaft 402 to rotate, thereby driving the swing arm 401 to swing up and down. The left and right bag-supporting mechanism 400 has two working modes in terms of timing. Before the airflow opening mechanism 300 generates ion airflow, the swing arm 401 swings down to a first angle, such as 45 degrees, to initially position the left and right sides of the continuous packaging bag. Before the heat sealing knife 600 seals the bag, the swing arm 401 swings down to a second angle, such as 60 to 90 degrees, to fully tighten the packaging bag to the left and right sides to ensure the flatness of the subsequent heat sealing by the heat sealing knife.

[0043] As an important improvement of this invention, the front bag-supporting mechanism 500 is horizontally movable and positioned at the front of the sealing operation station. Its function is to further pull forward the front wall of the continuous packaging bag 1000', which has been initially opened by the left and right bag-supporting mechanisms 400 and the airflow bag-opening mechanism 300, and maintain it in a preset open position, ensuring that the bag opening is fully and smoothly opened, facilitating the insertion of the items to be packaged. The front bag-supporting mechanism 500 includes a drive module 510, a bracket 520, a negative pressure suction nozzle 530, and a clamping module 540.

[0044] The drive module 510 is used to provide power for forward and backward movement. Specifically, the drive module 510 includes a drive motor 511 arranged in the left-right direction, a gear 512 arranged in the left-right direction and driven by the drive motor 511, and a rack 513 arranged on the upper side of the gear 512 and meshing with it in the front-back direction. A slide rail 514 is fixed parallel to one side wall of the rack 513 facing the inner side of the protective housing 102. The slide rail 514 is slidably connected to the side wall of the protective housing 102 in the front-back direction through a slider 515.

[0045] To ensure smooth driving, two drive units are provided, consisting of gears 512, racks 513, slide rails 514, and sliders 515, and are respectively installed on the left and right side walls of the protective housing 102. The gears 512 on both sides are coaxially fixed by a drive shaft 516 arranged inside the protective housing 102 in the left-right direction. The drive shaft 516 is rotatably connected to the protective housing 102. The drive motor 511 is fixed inside the protective housing and drives the drive shaft 516 to rotate on a fixed axis through a transmission belt 517, so that the gears 512 rotate synchronously.

[0046] The support 520 is elongated and horizontally positioned along the left-right direction. Its two ends are fixedly connected to the front ends of the slide rails 514 on the left and right sides, respectively. Therefore, when the drive motor 511 operates, the entire support 520 and its components can be moved back and forth along the slide rails 514 via the transmission of gears 512 and racks 513. Multiple negative pressure suction nozzles 530 are arranged side-by-side on the support 520 along the left-right direction, with their suction ports facing backward. They are used to generate negative pressure suction when in contact with the front wall of the packaging bag, gently gripping the front of the bag opening.

[0047] The clamping module 540 includes a fixed clamping arm 541, a movable clamping arm 542, and a swing drive unit for driving the movable clamping arm 542. The fixed clamping arm 541 is fixedly mounted on the bracket 520, and its rear end has a vertically downward clamping portion 5411. The movable clamping arm 542 also has a vertically downward clamping portion 5421, and is vertically opposite to the clamping portion 5411 of the fixed clamping arm 541. The clamping portion 5411 of the fixed clamping arm 541 is located on the front side of the rear sidewall of the pressure strip 61 that is heat-sealed and cut by the heat-sealing knife 600, while the clamping portion 5421 of the movable clamping arm 542 is vertically aligned with the rear sidewall of the pressure strip 61.

[0048] The swing drive unit includes a clamping motor 543 mounted on a bracket 520 in the left-right direction, and a clamping shaft 544 coaxially fixed on the shaft of the clamping motor 543. Multiple movable clamping arms 542 are evenly arranged on the clamping shaft 544 in the left-right direction. The clamping motor 543 drives the clamping shaft 544 to rotate, which in turn drives the clamping part 5421 of the movable clamping arm 542 to swing up and down, cooperating with the clamping part 5411 of the fixed clamping arm 541 to achieve clamping or releasing actions.

[0049] As a preferred arrangement, the negative pressure suction nozzle 530 and the fixed clamping arm 541 are both located on the lower side of the clamping pivot 544, and there are two of each of the negative pressure suction nozzle 530, fixed clamping arm 541 and movable clamping arm 542. The two fixed clamping arms 541 are respectively located between the two negative pressure suction nozzles 530, so that the adsorption and clamping actions are smoothly connected.

[0050] The heat-sealing knife 600 is a long, wavy strip positioned horizontally on the sealing station plate directly opposite the pressure strip 61. The pressure strip 61 is mounted on the bracket 520 of the front bag-supporting mechanism 500 and moves synchronously with the movable end of the front bag-supporting mechanism 500, i.e., the bracket 520. The pressure strip 61 is specifically positioned below the negative pressure suction nozzle 530, with the suction surface of the negative pressure suction nozzle 530 flush with the sealing end sidewall (rear sidewall) of the pressure strip 61 to ensure accurate positioning. The pressure strip 61 is connected to the bracket 520 via front and rear air springs 601, allowing the heat-sealing knife 600 to elastically press the bag opening with the pressure strip 61 during sealing, ensuring sealing quality.

[0051] The labeling mechanism 700 is located at the rear upper part of the sealing station plate 2A and is used to attach the label to the continuous packaging bag 1000' below it. As another important improvement, the labeling mechanism 700 is mounted on the protective shell 102 via a movable bracket 800. The movable bracket 800 is a square frame structure, with its left and right front sides longitudinally rotatably connected to the upper edge of the protective shell 102 via rotating seats 801. The rotating seats 801 are equipped with hydraulic support rods 802 that rotate synchronously with the movable bracket 800. The cylinder of the hydraulic support rod 802 is longitudinally hinged to the rotating seats 801, and its movable shaft is hinged to the movable bracket 800. This structure allows the labeling mechanism 700 to be opened longitudinally forward or closed longitudinally backward as a whole. When it is necessary to replace consumables or perform maintenance, the operator only needs to pull the movable bracket 800 forward, and the hydraulic support rod 802 can assist in supporting and keeping it in the open state, thereby obtaining an extremely spacious operating space and greatly improving the convenience of maintenance. The movable bracket 800 has a connecting plate 803 that connects its front and rear side walls. The connecting plate 803 is set upright to provide an installation base for the various components of the labeling mechanism 700.

[0052] Specifically, the labeling mechanism 700 includes a label feeding roller 710 horizontally arranged in the left-right direction for continuously supplying label tape 2000, a label peeling plate 720 with its front end inclined downward and its upper surface being a feeding surface for the label tape to slide against, and its front end being a peeling surface for the label tape to peel off from its waste base tape, a label tensioning roller 730 disposed between the label feeding roller 710 and the label peeling plate 720 for tensioning the label tape on the feeding side and the discharge side of the label peeling plate 720 and can rotate synchronously with the label feeding roller 710, a label base tape take-up roller 740 disposed on the discharge side of the label peeling plate 720 for driving the waste base tape to continuously feed, and a label driving motor for driving the label base tape take-up roller 740 to rotate.

[0053] All the rollers and drive motors mentioned above are mounted on the connecting plate 803. This equipment also includes a label pressing module 900, located above the discharge side of the labeling mechanism 700. Its function is to actively press the label downwards onto the continuous packaging bag 1000' after it is peeled from the waste material base. The label pressing module 900 includes a movable pressing head 901, a lifting unit 902 that drives the movable pressing head 901 to move up and down, and a label positioning sensor 904 for sensing the label's positioning. A support plate 903 is located directly below the movable pressing head 901. When the movable pressing head 901 presses down, the packaging bag is supported on the support plate 903, ensuring the label is pressed flat and firmly.

[0054] To facilitate the smooth insertion of the items to be packaged into the opened bag opening, a feeding funnel 110 is provided on the front side of the sealing station plate 2A and the upper side of the clamping module 540. The feeding funnel 110 is connected and fixed to the protective shell 102. At the same time, to provide protection for precision components such as the drive module 510, the negative pressure suction nozzle 530, and the clamping arm, a U-shaped protective cover 120 is provided on the front side of the protective shell 102. The two ends of the protective cover 120 are connected to the left and right side walls of the protective shell 102, and the aforementioned left and right racks 513 are located between the two arms of the protective cover 120.

[0055] At the lower end of the sealing station plate 2A, there is a tray 130 that can be flipped up and down. The tray 130 is driven by a cylinder 140. When the packing bag is fully opened by the front bag-supporting mechanism 500, the cylinder 140 drives the tray 130 to flip up to a horizontal position. At this time, the operator or automated equipment puts the goods into the packing bag through the feeding funnel 110. The goods are held up by the tray 130. When the sealing operation is completed, the tray 130 returns to its original position. The sealed and cut individual packaging bags separate from the continuous packing bags 1000' under the action of gravity and fall into the storage box below, completing a complete packaging cycle.

[0056] The packaging equipment of this invention is controlled by an industrial control host 2B, i.e., a controller, which executes the control program to achieve automated operation. The controller predefines four core operating states, including the normal state (the system has completed initialization and is in standby state, and can respond to task instructions issued by the host computer), the bag ejection success state (the bag ejection (i.e., bag opening) process is completed smoothly, the packaging bag has been stably adsorbed and tightened, and is ready to enter the bag sealing stage), the bag ejection abnormal state (the bag ejection process is interrupted due to sensor failure (such as bag ejection sensor B4, bag hook sensor (high-precision position sensor B1)), mechanical jamming (such as bag hooking failure), etc.), and the bag sealing abnormal state (the bag sealing process is interrupted due to heating failure, position deviation, anti-pressure sensor B3 triggering, etc.).

[0057] The general state transition logic is as follows: After power-on, the system executes the initialization process and enters the normal state upon completion. In the normal state, it receives the bag-dispensing command from the host computer and executes a series of bag-opening actions. Based on the execution result, it transitions to the following state: if successful, it enters the bag-dispensing success state; if it fails, it enters the bag-dispensing error state. In the bag-dispensing success state, it receives the bag-sealing command from the host computer and executes the bag-sealing action. Based on the result, it transitions to the following state: if successful, it returns to the normal state to prepare for the next cycle; if it fails, it enters the bag-sealing error state. In any error state, the system pauses task execution and reports the specific fault code to the host computer. It must wait for the host computer to issue a recovery command or for manual intervention to resolve the fault before returning to the normal state.

[0058] Specifically, after the system is powered on, the controller executes the initialization process. First, it listens for the initialization command issued by the host computer through a communication interface such as Bluetooth, WiFi, or TTL (establishing communication). After receiving a valid command, it starts the system self-test and performs status detection on modules such as photoelectric sensor 904, origin limit position sensor B2 (there are multiple of them, one is located on the upper side of the swing arm 401, and the other is located on the slide rail 514 (detecting the origin position of the rack)), stepper motor driver, heating wire of heat sealing knife, vacuum suction cup, fan, bag supporting actuator, etc., to verify whether each module is in the preset physical return state. If any module is detected to be out of place or in an abnormal state, the hierarchical fault alarm mechanism is triggered, the fault code is recorded and fed back to the host computer through the communication interface, and the initialization process (system self-test) is terminated.

[0059] If the detection is normal, the preset configuration file is read from the non-volatile memory, and the target position of each axis motor, the heating time setting value of the heating element, the bag size adaptation parameters and other operating parameters are loaded (parameter loading). After initialization, the internal error flag table is cleared, the packing machine running status is updated to normal status, and an initialization completion message is sent to the host computer (status ready).

[0060] When the controller receives the bag-opening instruction from the host computer, it first checks whether the current status of the packing machine meets the execution conditions, such as the printer being in normal condition. If the conditions are met, the bag-opening action is executed sequentially.

[0061] First, the labeling mechanism 700 is controlled to attach the label to the continuous packaging bag 1000'. Specifically, the controller controls the label belt drive motor to drive the label base belt take-up roller 740 to rotate, so that the label belt 2000 is conveyed from the label belt feed roller 710 through the label belt tension roller 730 to the label peeling plate 720. When the label belt passes the front end of the label peeling plate 720, the label is peeled off from the waste base belt. Then, the controller controls the movable pressure head 901 of the label pressing module 900 to move downward, pressing the peeled label onto the continuous packaging bag 1000'. At the same time, the laser sensor 904 detects whether the label is attached. If it is continuously triggered and the label is not detected, a re-attaching operation is performed. If it is still unqualified, it is marked as label abnormal and reported.

[0062] Before the airflow opening mechanism 300 generates ion airflow, the controller controls the swing arm 401 in the left and right bag support mechanism 400 to swing downward to a first angle, such as 45 degrees, to initially position the left and right sides of the continuous packaging bag. After the swing arm 401 is in position, the controller controls the airflow opening mechanism 300 to generate downward ion airflow, causing the opening of the continuous packaging bag 1000' to expand. Subsequently, the controller controls the front bag-supporting mechanism 500 to perform gripping and pulling at the front of the bag opening. Specifically, the controller controls the negative pressure suction nozzle 530 to generate negative pressure to adsorb the front wall of the continuous packaging bag 1000'. After successful adsorption, the controller controls the clamping motor 543 to drive the clamping shaft 544 to rotate, causing the clamping part 5421 of the movable clamping arm 542 to swing downward and fit together with the clamping part 5411 of the fixed clamping arm 541, thereby clamping the front wall. After clamping is completed, the controller controls the drive motor 511 to work, and through the gear 512 and rack 513, drives the bracket 520 and the negative pressure suction nozzle 530 and clamping module 540 installed on it to move forward synchronously to the preset position, thus opening the front wall of the continuous packaging bag 1000' forward.

[0063] During the bag gripping process, the controller monitors the gripping status in real time through a high-precision position sensor B1 (installed on the device). If the initial gripping fails, the bag hooking logic is repeated. Specifically, the controller controls the front bag support mechanism 500 to reset and re-execute the suction, clamping, and moving actions. If the number of repetitions reaches a first preset threshold, such as 3 times, and still fails, the controller marks it as a bag hooking abnormality and enters a bag exiting abnormality state, suspending task execution and reporting a fault code. If the bag opening action is successful, i.e., the bag gripping is successful, the controller shuts off the vacuum suction cup, keeps the fan running continuously to maintain the bag's shape stability, and updates the packaging machine status to a successful bag exit state, feeding back to the host computer.

[0064] When the controller receives the sealing instruction from the host computer, it first checks the current status of the packing machine. If the bag ejection process has not been completed, the sealing operation is prohibited. If an abnormal sealing status is detected, the abnormal handling sub-process is entered. If the status is normal, the sealing process continues. The controller turns off the fan and controls the sealing motor to move to the receiving station. The pallet 130 vibrates rapidly to smoothly put the goods into the bag, preventing the goods from obstructing the sealing area and causing the seal to fail. The sealing motor moves to the bag hook position and slightly releases the tension of the bag hook mechanism, for example, loosening it by 10 mm. The controller controls the left and right bag support motors 403 to drive the swing arm 401 to swing downward to a second angle, for example, greater than 45 degrees, such as 60 to 90 degrees, to fully tighten the packing bag to the left and right sides, ensuring that the bag opening sealing area is flat and wrinkle-free. Then the bag hook motor returns to the gripping position to fix the bag. The controller controls the sealing motor to move towards the sealing position, and monitors the status of the anti-pressure sensor B3 in real time during the process. If the anti-pressure sensor B3 is not triggered (triggered by the trigger plate of the product partition squeeze sensor), the sealing action continues. If the anti-pressure sensor B3 is triggered, the movement stops immediately and the repair logic is entered. The controller controls the sealing motor to return to the receiving position and drives the pallet 130 to move back and forth to relieve the pressure. Then the sealing steps are repeated. If the number of repetitions reaches the second preset threshold, such as 3 times, and the anti-pressure sensor B3 is still triggered, the controller marks it as a sealing abnormality and enters the bag sealing abnormality state.

[0065] After sealing, the controller energizes the heating wire for a preset time, such as 800 milliseconds, to complete the heat-sealing operation. Simultaneously, the controller controls the support plate motor to return to its original position to shape the bag. The controller then controls the left and right support motors 403 to return to their original positions to perform the bag-breaking operation. The sealing motor moves to the bag-dropping position, the hook motor returns to its original position, the synchronous tray returns to its original position, and the controller controls the top rod motor to push out the finished bag. Sensor B4 detects whether the bag has completely detached. The finished bag is then conveyed to the next process or collection area. The controller updates the packaging machine status to "sealing complete" and sends feedback to the host computer. When the equipment enters an abnormal bag-discharging or sealing state, the controller pauses task execution and reports a fault code to the host computer via the communication interface. The controller can only return to normal operation after receiving a recovery command from the host computer.

[0066] The communication between the controller and the host computer employs a streamlined and efficient frame structure design. The command frame includes a fixed frame start code of 0xF0, a command sequence number ranging from 0 to 255, a function code, a command code, length, a data field, and a CRC checksum. The response frame structure is similar to the command frame, where the function code is differentiated into a successful or failed response based on the execution result, and the response code is consistent with the command code in the command frame. When the device detects a fatal fault such as motor stall, sensor failure, or a critical state change, the controller proactively sends a status change notification to the host computer via a notification frame, including information such as the fault type and occurrence time. After startup, the controller periodically sends heartbeat packets to maintain the communication link with the host computer. The heartbeat interval is 3 seconds, and the heartbeat content includes the device operating status code, current task progress, and system health information. If the host computer does not send any response or confirmation information within three consecutive heartbeat cycles, the controller determines that the communication link may be abnormal.

[0067] Through the above specific embodiments, the present invention has achieved significant beneficial effects.

[0068] First, through a three-level coordinated bag opening control of "airflow expansion, left and right positioning, and front pulling", especially the front bag support mechanism which adopts a dual gripping method of negative pressure adsorption and mechanical clamping, actual tests have shown that for packaging bags with softer materials and stronger electrostatic adsorption, the bag opening success rate has been increased from about 90% in the existing technology to more than 99.9%.

[0069] Secondly, by defining four operating states and introducing a finite retry mechanism, the automatic recovery rate when the hook bag fails and the sealing pressure is triggered can reach more than 99%, which greatly reduces the manual intervention caused by transient failures.

[0070] Furthermore, the labeling mechanism is assembled with a flip-open movable bracket, reducing the consumable replacement time from approximately 10 minutes in the traditional solution to less than 2 minutes.

[0071] Finally, through complete frame format definition and heartbeat mechanism, reliable communication between the host computer and the device is achieved, effectively avoiding instruction loss or device status uncertainty caused by communication interruption.

[0072] In summary, this invention solves the technical problems existing in the prior art through deep collaboration between control methods and hardware structure, and realizes intelligent and highly reliable operation of packaging equipment.

[0073] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A control method for a packaging device, the packaging device comprising a sealing station plate, an airflow bag opening mechanism disposed on the upper side of the sealing station plate, a left and right bag supporting mechanism disposed below the airflow bag opening mechanism, a front bag supporting mechanism that can move horizontally back and forth and is disposed on the front side of the sealing operation station, and a heat sealing knife disposed on the sealing operation station; characterized in that, The control method includes the following steps: Define at least two operating states, including normal state, bag successfully dispensing state, bag dispensing abnormal state, and bag sealing abnormal state; After receiving the bag-opening instruction from the host computer, the following bag-opening actions are executed in sequence; The airflow opening mechanism is controlled to generate a downward ion airflow, causing the opening of the continuous packaging bag to expand; The left and right bag-supporting mechanisms are controlled to limit the front and back positions of the left and right sides of the continuous packaging bag from both sides. Control the front bag-supporting mechanism to move forward, and open the front side wall of the continuous packaging bag to a preset position; The system will jump to the corresponding state based on the result of the bag-opening action. If the bag opening action is successfully executed, the bag will be successfully dispensed. If the bag opening action fails, the bag exit abnormal state will be entered. Upon receiving a sealing instruction in the state of successful bag dispensing, the sealing action is executed, and the system jumps to the corresponding state based on the result of the sealing action. When the bag exiting or sealing process enters an abnormal state, the task execution is paused and a fault code is reported. The process can only return to normal after a recovery command is received.

2. The control method for the packaging equipment according to claim 1, characterized in that, The step of controlling the front bag-supporting mechanism to move forward and opening the front wall of the continuous packaging bag to a preset position specifically includes: The negative pressure suction nozzle located on the front bag support mechanism is controlled to adsorb the front side wall of the continuous packaging bag; The clamping module is controlled to clamp the front sidewall after adsorption; The control drive module drives the negative pressure suction nozzle and the clamping module to move forward synchronously to the preset position.

3. The control method for the packaging equipment according to claim 2, characterized in that, The steps for the control clamping module to clamp the adsorbed front sidewall include: The control swing drive unit drives the movable clamping arm to swing, so that its clamping part and the clamping part of the fixed clamping arm fit together, thereby clamping the front sidewall.

4. The control method for the packaging equipment according to claim 1, characterized in that, The step of controlling the left and right bag-supporting mechanisms to limit the front and back positions of the left and right sides of the continuous packaging bag includes: Before the airflow opening mechanism generates ion airflow, the swing arms in the left and right bag supporting mechanism are controlled to swing downward to a first angle to preliminarily position the front and back positions of the left and right ends of the continuous packaging bag. Before the heat sealing knife is controlled to seal the bag, the swing arm is controlled to swing downward to a second angle to tighten the bag to the left and right sides, wherein the second angle is greater than the first angle.

5. The control method for the packaging equipment according to claim 1, characterized in that, The bag-opening action also includes a bag-hooking action, and the control method further includes: If the hook bag action fails, repeat the hook bag action; If the repetition count reaches the first preset threshold and still fails, it is marked as a hook bag abnormality and enters the bag exit abnormality state.

6. The control method for the packaging equipment according to claim 1, characterized in that, The control method further includes: During the heat sealing process, the status of the anti-pressure sensor located on the movable end of the front bag support mechanism is monitored in real time. If the pressure sensor is triggered, the movable end of the front support bag mechanism is controlled to retract and the support plate is driven to shake to relieve the pressure. Repeat the sealing process. If the number of repetitions reaches the second preset threshold and still triggers the pressure sensor, it will be marked as a sealing abnormality and enter a sealing abnormality state.

7. The control method for the packaging equipment according to claim 1, characterized in that, The packaging equipment further includes a labeling mechanism located above and behind the sealing station plate, the labeling mechanism being assembled via a movable bracket that can open longitudinally forward or close longitudinally backward; the control method further includes: Before the airflow opening mechanism generates an ion airflow, the labeling mechanism is controlled to attach the label to the continuous packaging bag.

8. The control method for the packaging equipment according to claim 1, characterized in that, The step of controlling the labeling mechanism to affix the label to the continuous packaging bag includes: The control belt drive motor drives the base belt take-up roller to rotate, so that the fabric belt is conveyed from the fabric belt feed roller through the fabric belt tension roller to the fabric stripping plate; When the face sheet tape passes the front end of the face sheet peeling plate, the face sheet peels off from the waste material base tape. The movable pressure head of the control label pressing module moves downward to press the peeled label onto the continuous packaging bag.

9. The control method for the packaging equipment according to claim 1, characterized in that, Also includes: The left and right positions of the continuous packaging bags are detected by an anti-deviation detection mechanism located at the upper end of the sealing operation station. If continuous skewed feeding of packaging bags is detected, an alarm will be issued or the machine will be stopped.

10. The control method for the packaging equipment according to any one of claims 1-9, characterized in that, It also includes a communication step for data interaction with a host computer, wherein the communication step adopts the following frame format: Send a command frame, the command frame including a frame start code, command sequence number, function code, command code, length, data field and CRC check code; Receive a response frame, the response frame including a frame start code, command sequence number, function code, response code, length, data field and CRC check code; Actively send a notification frame, the notification frame including frame start code, command sequence number, function code, notification code, length, data field and CRC check code; Heartbeat packets are sent periodically. If no response is received from the host computer for several consecutive heartbeat cycles, the communication link is determined to be abnormal.

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