Automatic deviation correction and tension control mechanism for packaging film and use method of automatic deviation correction and tension control mechanism
By integrating automatic web correction and tension control functions, the problem of insufficient information sharing in independent design is solved, achieving stability and cost control in the film production process, and ensuring the improvement of film quality and production efficiency.
Patent Information
- Application Number
- CN202512044451.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing packaging film production, the independent design of automatic correction and tension control devices leads to insufficient information sharing and collaborative work, affecting production stability and equipment costs.
The automatic correction and tension control functions are integrated into one unit, and the two functions are linked and interacted through the control unit. The pull component and tension sensing component are used to monitor and adjust the film offset and tension in real time. The integrated design reduces the footprint and cost.
This has achieved stability in film quality and improved production efficiency, reduced equipment manufacturing costs and maintenance difficulty, and ensured smooth operation and neat edges of the film in each process.
Smart Images
Figure CN121536772A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of packaging film processing, in particular to an automatic deviation correction and tension control mechanism for packaging film and a use method thereof. BACKGROUND
[0002] As a key material widely used in various product packaging fields, packaging film plays an indispensable role in protecting goods, extending shelf life, and enhancing product display effects. With its good barrier properties, flexibility, and transparency, it can meet the diverse needs of product packaging in different industries, covering food, medicine, daily chemicals, electronics, and many other fields. The production process of packaging film is a complex and delicate engineering, usually involving raw material selection and proportioning, extrusion molding, stretching orientation, cooling and shaping, and winding, etc. Each link needs to accurately control the process parameters to ensure that the final produced packaging film has uniform thickness, good physical properties and stable chemical properties, so as to meet the strict requirements of the market for high-quality packaging film.
[0003] In the actual production process of packaging film, automatic deviation correction and tension control are key factors to ensure production stability and product quality. Due to the running state of production equipment, the characteristic differences of raw materials, and the interference of external environmental factors, etc., packaging film is prone to deviation in the production process. Once the film deviates, it will not only cause the film edge to be irregular, affecting the subsequent processing and use, but also may cause friction damage between the film and the equipment parts, reducing production efficiency and increasing production cost. At the same time, tension control is also a crucial link. Proper tension can ensure the smooth running of the film in each production process, avoid excessive stretching of the film due to excessive tension, uneven thickness, or wrinkles, slackness, etc. due to insufficient tension, and thus affect the overall quality of the packaging film. Therefore, in the production process of packaging film, effective automatic deviation correction and tension control devices must be equipped to achieve accurate regulation and control of the production process.
[0004] At present, the existing automatic deviation correction and tension control mechanism for packaging film production on the market can basically meet the production requirements in terms of function, but there are obvious deficiencies in integration. Most of these mechanisms adopt a relatively independent design, and the automatic deviation correction device and the tension control device are independently arranged, each having an independent driving system, sensor and control system. This independent design makes the two devices lack effective cooperative working mechanism, and it is difficult to realize real-time sharing and precise interaction of information in the production process. For example, when the film deviates, the automatic deviation correction device may not be able to adjust in time considering the current tension state, which may cause abnormal fluctuation of tension during adjustment, affecting the quality stability of the film. Moreover, the independent design of the mechanism increases the floor area of the equipment and the difficulty of installation and debugging, increases the manufacturing cost and maintenance cost of the equipment, and is not conducive to the improvement of production efficiency and the cost control of enterprises. SUMMARY
[0005] In order to at least solve one of the above technical problems, the purpose of the present application is to provide an automatic deviation correction and tension control mechanism for packaging film and a use method thereof, which integrates the functions of automatic deviation correction and tension control, and realizes the linkage and interaction of the two functions.
[0006] In order to achieve the above purpose, the present application provides the following technical scheme:
[0007] An automatic deviation correction and tension control mechanism for packaging film, comprising a rack, wherein the rack is provided with a feeding assembly and a discharging assembly on both sides respectively, the feeding assembly comprises a feeding frame fixedly connected with the rack, a feeding roller set is rotatably arranged on the feeding frame, a pulling assembly is arranged on both sides of the feeding roller set, the pulling assembly comprises an extension frame fixedly connected with the feeding frame, a pulling electric cylinder is arranged on the extension frame, a U-shaped pulling frame is fixedly arranged on the pulling electric cylinder, a pressing electric cylinder is fixedly arranged on both sides of the pulling frame, a pressing arc plate is fixedly arranged on the movable part of the pressing electric cylinder, the discharging assembly comprises an electric sliding table arranged on the rack, a discharging frame is arranged on the movable part of the electric sliding table through a tension sensing assembly, a discharging roller set is arranged on the discharging frame, a control unit is arranged on the rack, and the tension sensing assembly controls the movement of the electric sliding table according to a preset tension range.
[0008] Preferably, the tension sensing assembly comprises a damping slide rail fixedly arranged on the upper surface of the movable part of the electric sliding table, limit plates are fixedly arranged at both ends of the damping slide rail, the bottom of the discharging frame is slidably connected with the damping slide rail, and a buffer pad is arranged between the limit plates and the side wall of the discharging frame, a first pressure sensor is arranged in the buffer pad close to the feeding assembly, and the first pressure sensor controls the movement of the electric sliding table according to the preset tension range through the control unit.
[0009] Preferably, the working surface of the pressing arc plate is coated with a wear-resistant coating.
[0010] Preferably, a second pressure sensor is provided between the pressing electric cylinder and the pressing arc plate. The second pressure sensor controls the extension and retraction of the pressing electric cylinder according to a preset pressing pressure range and through a control unit.
[0011] Preferably, the number of the pulling components is four, and the pulling components are respectively arranged on both sides of the inlet of the feed roller group and on both sides of the outlet of the feed roller group.
[0012] Preferably, the electric slide is a ball screw type electric slide driven by a servo motor.
[0013] Preferably, the control unit is configured as a programmable logic controller.
[0014] A method for using an automatic web-aligning and tension control mechanism for packaging films includes the following steps:
[0015] Equipment startup: Install the packaging film onto the feed roller assembly and pull the film through the feed assembly and discharge assembly in sequence to put the film in a ready-to-process state; start the control unit to initialize the settings of each component, including setting the preset tension range, preset pressing pressure range, and the initial position parameters of the electric slide, pull cylinder, and pressing cylinder;
[0016] Film feeding and initial fixation: The control unit activates the pull cylinder in the feeding assembly, which moves the pull frame to a suitable position, placing it above the film edges on both sides of the feeding roller assembly. Subsequently, the control unit activates the pressing cylinder, whose moving part moves the pressing arc plate downwards, pressing it against the film edge and fixing it to the feeding frame. During the pressing process, the second pressure sensor monitors the pressing pressure in real time and feeds the pressure data back to the control unit. When the pressing pressure reaches the preset pressing pressure range, the control unit controls the pressing cylinder to stop extending and retracting, maintaining the current pressing state.
[0017] Film correction operation: During the film feeding process, if the film deviates, the control unit controls the corresponding pull cylinder to extend or retract according to the direction and degree of film deviation. For example, if the film deviates to the left, the control unit controls the pull cylinder on the right side of the feed roller group to shorten, while simultaneously controlling the pull cylinder on the left side of the feed roller group to extend. Through the pull frame and pressing arc plate, different directions of tension are applied to the edge of the film, so that the film gradually returns to the normal position, realizing the automatic correction function.
[0018] Film tension control: After passing through the feeding assembly, the film enters the discharging assembly. During the discharging process, the tension sensing assembly monitors the film tension in real time. Specifically, when the film tension changes, the discharging rack slides accordingly on the damping slide rail. The first pressure sensor in the buffer pad near the feeding assembly senses the pressure change and feeds the pressure data back to the control unit. The control unit analyzes and judges the pressure data according to the preset tension range. If the pressure data exceeds the preset tension range, the control unit controls the movement of the electric slide. For example, when the film tension is too high, the control unit controls the moving part of the electric slide to move away from the feeding assembly, increasing the distance between the discharging roller group and the feeding roller group, thereby reducing the film tension. When the film tension is too low, the control unit controls the moving part of the electric slide to move closer to the feeding assembly, decreasing the distance between the discharging roller group and the feeding roller group, increasing the film tension, so that the film tension is always kept within the preset tension range.
[0019] Continuous operation and monitoring: During continuous operation of the equipment, the control unit repeatedly performs the above-mentioned film correction and film tension control steps, monitors the film offset and tension changes in real time, and adjusts the working status of each component in a timely manner based on the monitoring results to ensure that the packaging film operates stably and with high quality in the automatic correction and tension control mechanism; at the same time, the operator can view the equipment's operating parameters and film status in real time through the control unit's display interface, so as to make manual intervention and adjustments when necessary;
[0020] Equipment Stop and Cleaning: After the packaging film is processed, the control unit stops all components, the pressing cylinder moves the pressing arc plate upward, and releases the pressure on the edge of the film; the processed film is removed from the discharge roller group, and the equipment is cleaned and maintained to prepare for the next use.
[0021] The present invention has the following beneficial effects:
[0022] I. Integrated Design Reduces Footprint and Cost: The automatic web guiding and tension control mechanism of this invention integrates automatic web guiding and tension control functions into one unit, changing the traditional approach where the automatic web guiding device and tension control device are set up separately. This integrated design avoids the complex structure resulting from each device having its own independent drive system, sensor, and control system, effectively reducing the equipment's footprint. Simultaneously, since there is no longer a need to install and debug two separate devices, the difficulty of installation and debugging is reduced, thereby reducing the equipment's manufacturing and maintenance costs, which is beneficial for enterprises to control costs and improve production efficiency.
[0023] II. Ensuring Stable Quality Through Interactive Integration of Correction and Tension Control: This invention achieves interactive integration of automatic correction and tension control functions. During production, when the film deviates from its designated path, the control unit adjusts the tension of the corresponding electric cylinder based on the direction and degree of film deviation, thus achieving automatic correction. During correction, because the correction and tension control functions are linked, the control unit simultaneously considers the current tension state, preventing abnormal tension fluctuations caused by correction adjustments. For example, during film correction, simply adjusting the film position will not lead to excessive tension causing overstretching or uneven thickness, or insufficient tension causing wrinkles or loosening, thereby ensuring the stability of the packaging film's quality.
[0024] III. Precise Film Correction Operation: This mechanism utilizes pulling components on both sides of the feed roller assembly. Pulling cylinders within these components move the pulling frame to the appropriate position, while pressing cylinders drive pressing arc plates to press against the film edge, securing it in place. When the film deviates, the control unit adjusts the corresponding pulling cylinders based on the direction and degree of deviation. For example, if the film deviates to the left, the control unit shortens the pulling cylinder on the right side of the feed roller assembly while simultaneously extending the pulling cylinder on the left. This applies different directional pulling forces to the film edge through the pulling frame and pressing arc plates, gradually returning the film to its normal position. This precise correction operation effectively solves the film deviation problem, ensuring neat film edges, facilitating subsequent processing and use, and reducing friction damage between the film and equipment components.
[0025] IV. Precise Film Tension Control: During the unloading process, the tension sensing component monitors the film tension in real time. When the film tension changes, the unloading rack slides accordingly on the damping slide rail. The first pressure sensor in the buffer pad near the feeding component senses the pressure change and feeds it back to the control unit. The control unit analyzes the pressure data according to the preset tension range. If the pressure data exceeds the preset range, it controls the movement of the electric slide. When the film tension is too high, the electric slide moves away from the feeding component, increasing the distance between the unloading roller group and the feeding roller group, thus reducing the film tension. When the film tension is too low, the electric slide moves closer to the feeding component, decreasing the distance and increasing the tension, ensuring that the film tension is always maintained within the preset range. This guarantees the smooth operation of the film in each production process and avoids affecting the overall film quality due to tension issues.
[0026] V. Unique Pressing Pressure Control Ensures Film Fixation: A second pressure sensor is installed between the pressing cylinder and the pressing arc plate. During the pressing process, the second pressure sensor monitors the pressing pressure in real time and feeds the pressure data back to the control unit. When the pressing pressure reaches the preset pressing pressure range, the control unit controls the pressing cylinder to stop extending and retracting, maintaining the current pressing state. This design ensures that the pressing arc plate presses the film edge with appropriate pressure, preventing the film from being poorly fixed due to insufficient pressure, which could lead to slippage during correction or production, and preventing damage to the film due to excessive pressure. This ensures stable fixation of the film during the feeding process and provides a good foundation for subsequent operations such as correction and tension control.
[0027] VI. Wear-resistant coating extends component lifespan: The working surface of the pressing arc plate is coated with a wear-resistant coating. During pressing and correction processes, the pressing arc plate will frequently come into contact with and rub against the edge of the film. The wear-resistant coating can effectively reduce the wear of the pressing arc plate, extend its service life, reduce the frequency and cost of equipment maintenance, ensure long-term stable operation of the equipment, and improve production efficiency.
[0028] VII. Programmable Logic Controller Enhances Control Flexibility: The control unit is equipped with a programmable logic controller, which features high flexibility and programmability. Operators can program and set the control unit according to different production needs, film characteristics, and process requirements, adjusting preset tension ranges, preset pressing pressure ranges, and the working parameters of each component, enabling the equipment to adapt to the production of various types of packaging films and improving the equipment's versatility and applicability.
[0029] 8. Continuous Operation Monitoring and Manual Intervention to Ensure Production Stability: During continuous equipment operation, the control unit repeatedly performs film correction and tension control procedures, monitoring film deviation and tension changes in real time. Based on the monitoring results, it promptly adjusts the operating status of each component to ensure stable and high-quality operation of the packaging film within the mechanism. Simultaneously, operators can view the equipment's operating parameters and film status in real time through the control unit's display interface, allowing for manual intervention and adjustments when necessary, further ensuring production stability and product quality. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0031] Fig. 1 This is a side view of an embodiment of the present invention.
[0032] Fig. 2 This is a schematic diagram of the pull component according to an embodiment of the present invention.
[0033] Fig. 3 This is a cross-sectional view of the tension sensing component according to an embodiment of the present invention.
[0034] In the diagram: 1. Frame; 201. Feed rack; 202. Feed roller assembly; 301. Extension frame; 302. Pulling electric cylinder; 303. Pulling frame; 304. Pressing electric cylinder; 305. Pressing arc plate; 306. Second pressure sensor; 401. Electric slide table; 402. Discharge rack; 403. Discharge roller assembly; 5. Control unit; 601. First pressure sensor; 602. Damping slide rail; 603. Limiting plate; 604. Buffer pad. Detailed Implementation
[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0036] like Figs. 1 to 3 As shown, an automatic correction and tension control mechanism for packaging film includes a frame 1. A feeding assembly and a discharging assembly are respectively arranged on both sides of the frame 1. The feeding assembly includes a feeding frame 201 fixedly connected to the frame 1. A feeding roller assembly 202 is rotatably mounted on the feeding frame 201. Pulling assemblies are arranged on both sides of the feeding roller assembly 202. The pulling assembly includes an extension frame 301 fixedly connected to the feeding frame 201. A pulling electric cylinder 302 is mounted on the extension frame 301. A fixed... The machine is equipped with a U-shaped pull frame 303, and pressing electric cylinders 304 are fixedly installed on both sides of the pull frame 303. The moving part of the pressing electric cylinder 304 is fixedly installed with a pressing arc plate 305. The discharge assembly includes an electric slide table 401 installed on the frame 1. A discharge rack 402 is installed on the moving part of the electric slide table 401 through a tension sensing component. A discharge roller group 403 is installed on the discharge rack 402. A control unit 5 is installed on the frame 1. The tension sensing component controls the movement of the electric slide table 401 according to a preset tension range.
[0037] like Figs. 1 to 3As shown, the feeding rack 201 has pulling components on both sides of the feeding roller group 202. In the pulling components, the extension frame 301 is fixedly connected to the feeding rack 201, the pulling cylinder 302 is mounted on the extension frame 301, and a U-shaped pulling frame 303 is fixed on the pulling cylinder 302. Pressing arc plates 305 are fixed to the movable parts of the pressing cylinders 304 on both sides of the pulling frame 303. When the packaging film deviates during the feeding process, the control unit 5, based on the detected deviation (although the specific detection method is not mentioned, it is presumed that a relevant sensor detects the film position), controls the corresponding pulling cylinder 302 to move. The pulling cylinder 302 drives the pulling frame 303 to move, thereby bringing the pressing cylinder 304 and the pressing arc plate 305 closer to the film. Then, the pressing cylinder 304 moves, and the pressing arc plate 305 presses the film. Through the different forces or actions of the pulling components on both sides, the film is pulled back to the correct position, achieving automatic correction. In the discharging assembly, an electric slide table 401 is mounted on the frame 1. A discharging rack 402 is mounted on the movable part of the electric slide table 401 via a tension sensing component. A discharging roller assembly 403 is mounted on the discharging rack 402. The tension sensing component can detect the tension of the packaging film in real time and transmit the detected tension data to the control unit 5. The control unit 5 has a preset tension range. When the detected tension exceeds the preset range, the control unit 5 controls the movable part of the electric slide table 401 to move according to the tension deviation. The movement of the movable part of the electric slide table 401 drives the discharging rack 402 and the discharging roller assembly 403 to move, thereby changing the stretch of the packaging film and restoring the tension to the preset range, thus achieving tension control.
[0038] A photoelectric sensor can be used, installed near the feed roller assembly 202 and symmetrically arranged on both sides of the film. When the film shifts and blocks one side of the photoelectric sensor, the film shift and its direction can be determined. A first pressure sensor 601 can be used, installed at the connection between the discharge rack 402 and the movable part of the electric slide table 401. Film tension data can be obtained by measuring the force on the connection part. In automatic correction, when the film is detected to have shifted to one side, the control unit 5 controls the pulling cylinder 302 on that side to extend a certain distance (the specific distance can be preset according to parameters such as film material and thickness; for example, for common packaging films with a thickness of 0.02-0.05mm, the extension distance can be set to 5-10mm). At the same time, the control unit controls the pressing cylinder 304 to extend so that the pressing arc plate 305 presses the film with a certain pressure (the pressure can be set according to the film characteristics, such as 10-20N). In tension control, when the tension exceeds the upper limit of the preset range, the control unit 5 controls the moving part of the electric slide 401 to move a certain distance away from the feeding direction (the moving distance can be set according to the tension deviation; for example, when the tension deviation is 5%, the moving distance is set to 10-20mm). When the tension is lower than the lower limit of the preset range, the control unit controls the moving part of the electric slide 401 to move a corresponding distance closer to the feeding direction.
[0039] like Figs. 1 to 3 As shown, in the tension sensing assembly, the damping slide rail 602 is fixedly mounted on the upper surface of the movable part of the electric slide table 401. The bottom of the discharge rack 402 is slidably connected to the damping slide rail 602, allowing the discharge rack 402 to slide relative to the movable part of the electric slide table 401 on the damping slide rail 602. The limiting plate 603 is fixed at both ends of the damping slide rail 602, limiting the sliding range of the discharge rack 402. The buffer pad 604 is positioned between the limiting plate 603 and the side wall of the discharge rack 402, preventing direct collision and damage between the discharge rack 402 and the limiting plate 603. During the discharge process, the tension of the packaging film acts on the discharge rack 402, causing it to slide relative to the damping slide rail 602, thereby pressing the first pressure sensor 601 in the buffer pad 604 near the feeding assembly. The first pressure sensor 601 detects the pressure in real time and transmits the pressure data to the control unit 5. The control unit 5 presets a pressure range corresponding to the packaging film tension (because changes in film tension are reflected as pressure changes between the discharge rack 402 and the first pressure sensor 601). When the detected pressure exceeds the preset range, the control unit 5 controls the movement of the electric slide table 401 according to the pressure deviation. For example, when the pressure is too high (i.e., the film tension is too high), the control unit 5 controls the electric slide table 401 to move away from the feeding assembly, increasing the distance between the discharge roller group 403 and the feeding roller group 202, thereby reducing the film stretch and lowering the tension. When the pressure is too low (i.e., the film tension is too low), the control unit 5 controls the electric slide table 401 to move closer to the feeding assembly, decreasing the distance between the discharge roller group 403 and the feeding roller group 202, thereby increasing the film stretch and raising the tension, thus achieving tension control.
[0040] like Figs. 1 to 3As shown, a second pressure sensor 306 is installed between the pressing cylinder 304 and the pressing arc plate 305. During the automatic correction process, when the packaging film needs to be pulled and corrected, the pressing cylinder 304 actuates to cause the pressing arc plate 305 to press the film. At this time, the pressure of the pressing arc plate 305 on the film is transmitted to the second pressure sensor 306. The second pressure sensor 306 detects the pressing pressure in real time and transmits the pressure data to the control unit 5. The control unit 5 has a preset pressing pressure range. When the detected pressing pressure exceeds the preset range, the control unit 5 controls the pressing cylinder 304 to extend or retract according to the pressure deviation. For example, if the pressure is too high, the control unit 5 controls the pressing cylinder 304 to retract, reducing the pressure of the pressing arc plate 305 on the film; if the pressure is too low, the control unit 5 controls the pressing cylinder 304 to extend, increasing the pressure of the pressing arc plate 305 on the film, so as to ensure that the pressing arc plate 305 presses the film with appropriate pressure and achieves a good correction effect. The working surface of the pressing arc plate 305 is coated with a wear-resistant coating. During the long-term contact and relative friction between the pressing arc plate 305 and the packaging film, the wear-resistant coating can reduce the wear on the working surface of the pressing arc plate 305, extend the service life of the pressing arc plate 305, and at the same time ensure the flatness of the working surface of the pressing arc plate 305, thereby ensuring the stability and uniformity of film pressing and facilitating the accurate automatic correction.
[0041] like Figs. 1 to 3 As shown, there are four pulling components, respectively located on both sides of the inlet and outlet of the feed roller group 202. During the feeding process of the packaging film, when the film deviates at the inlet, the pulling components on both sides of the inlet can play a role. For example, if the film deviates to the left of the inlet, the pulling component on the right side of the inlet starts to work. Its pulling electric cylinder 302 extends, driving the pulling frame 303 to move, which in turn brings the pressing electric cylinder 304 and the pressing arc plate 305 closer to the film. The pressing electric cylinder 304 extends, and the pressing arc plate 305 presses the film with a certain pressure, pulling the film to the right and returning it to the correct position. Similarly, if the film deviates to the right of the inlet, the pulling component on the left side of the inlet performs the opposite operation to correct the deviation. When the film deviates at the outlet of the discharge roller group 403, the pulling components on both sides of the outlet correct the film using the same principle. This layout, which includes pull components on both the inlet and outlet sides of the feed roller assembly 202, allows for more comprehensive monitoring and correction of film deviation throughout the feeding process, improving the accuracy and timeliness of correction and ensuring that the film is always transported along the correct path.
[0042] like Figs. 1 to 3As shown, the electric slide 401 is a ball screw type electric slide 401 driven by a servo motor. The servo motor features high precision and high response speed, and can accurately control the rotation angle and speed according to the instructions issued by the control unit 5. The ball screw converts the rotational motion of the servo motor into linear motion, and has advantages such as high transmission efficiency, high positioning accuracy, and low friction. During tension control, when the tension sensing component (first pressure sensor 601) detects that the film tension exceeds the preset range, the control unit 5 (programmable logic controller) sends a corresponding control signal to the servo motor according to the tension deviation. The servo motor rotates precisely by a certain angle according to the signal, which drives the moving part of the electric slide 401 to move through the ball screw, thereby adjusting the position of the discharge rack 402 and the discharge roller group 403, changing the degree of film stretching, and restoring the film tension to the preset range, thus achieving high-precision tension control.
[0043] like Figs. 1 to 3 As shown, the control unit 5 is a programmable logic controller (PLC). The PLC possesses strong anti-interference capabilities, reliability, and flexibility, enabling it to adapt to complex industrial environments. It can receive signals from the first pressure sensor 601 (detecting film tension) and the second pressure sensor 306 (detecting pressing pressure), and process and analyze these signals according to a preset program. Based on the processing results, the PLC sends control commands to the servo motor of the electric slide 401 and the pressing cylinder 304, achieving precise control over the movement of the moving part of the electric slide 401 and the extension and retraction of the pressing cylinder 304. This completes various operations in the tension control and automatic correction process, ensuring the stable and reliable operation of the entire packaging film automatic correction and tension control mechanism.
[0044] A method for using an automatic web-aligning and tension control mechanism for packaging films includes the following steps:
[0045] Device startup:
[0046] The packaging film is installed onto the feed roller assembly 202 and pulled through the feed and discharge components, placing the film in a ready-to-process state. This provides the basic operating object for subsequent correction and tension control. After starting the control unit 5, initialization settings are performed, including setting the preset tension range, preset pressing pressure range, and initial position parameters for each electric cylinder. The preset tension range is determined based on factors such as the material, thickness, and processing technology of the packaging film, ensuring that the film is under appropriate tension during processing and avoiding problems such as film breakage due to excessive tension or wrinkles due to insufficient tension. The preset pressing pressure range is to ensure that the pressing arc plate 305 can stably fix the edge of the film without damaging it. The initial position parameters of the electric slide 401, pulling electric cylinder 302, and pressing electric cylinder 304 are set to ensure that each component is in a suitable starting position for accurate subsequent actions.
[0047] Film feeding and initial fixation:
[0048] Control unit 5 activates the pull cylinder 302 in the feeding assembly, which moves the pull frame 303 to a suitable position, positioning it above the film edges on both sides of the feeding roller assembly 202. This ensures accurate pressing and fixing of the film edges later. Next, control unit 5 activates the pressing cylinder 304, whose movable part moves the pressing arc plate 305 downwards to press the film edges, fixing them onto the feeding frame 201. During the pressing process, the second pressure sensor 306 monitors the pressing pressure in real time and feeds it back to control unit 5. When the pressing pressure reaches the preset range, control unit 5 stops the extension and retraction of the pressing cylinder 304, maintaining the current pressing state. This ensures the film edges are stably fixed, providing a stable foundation for subsequent correction operations.
[0049] Thin film correction operation:
[0050] During the film feeding process, if the film deviates, the control unit 5 controls the corresponding pull cylinder 302 to extend or retract according to the direction and degree of film deviation. For example, when the film deviates to the left, the control unit 5 controls the pull cylinder 302 on the right side of the feed roller group 202 to shorten, so that the right pull frame 303 and the pressing arc plate 305 are closer to the film, applying a rightward pull force to the right edge of the film; at the same time, it controls the pull cylinder 302 on the left side of the feed roller group 202 to extend, so that the left pull frame 303 and the pressing arc plate 305 are away from the film, reducing the pull force on the left edge of the film. Through this pull force in different directions, the film gradually returns to the normal position, realizing the automatic deviation correction function.
[0051] Thin film tension control:
[0052] After the film enters the discharge assembly through the feeding assembly, the tension sensing assembly monitors the film tension in real time during the discharge process. When the film tension changes, the discharge rack 402 slides on the damping slide rail 602, and the first pressure sensor 601 in the buffer pad 604 of the feeding assembly senses the pressure change and feeds it back to the control unit 5. The control unit 5 analyzes and judges the pressure data according to the preset tension range. If the pressure data exceeds the preset range, it controls the movement of the electric slide table 401. When the film tension is too high, the control unit 5 controls the moving part of the electric slide table 401 to move away from the feeding assembly, increasing the distance between the discharge roller group 403 and the feeding roller group 202, thereby reducing the film stretching and thus reducing the film tension. When the film tension is too low, the control unit 5 controls the moving part of the electric slide table 401 to move closer to the feeding assembly, decreasing the distance between the discharge roller group 403 and the feeding roller group 202, thereby increasing the film stretching and increasing the film tension, so that the film tension is always kept within the preset range.
[0053] Continuous operation and monitoring:
[0054] During continuous operation, control unit 5 repeatedly performs film correction and tension control procedures, monitoring film deviation and tension changes in real time. This is because the film may be affected by various factors during processing, leading to continuous new deviations and tension changes. Continuous monitoring and timely adjustment of the operating status of each component ensures stable and high-quality operation of the packaging film. Simultaneously, operators can view equipment operating parameters and film status through the control unit 5's display interface, allowing for manual intervention and adjustments when necessary. For example, manual intervention can be implemented promptly when automatic control malfunctions or special film conditions arise.
[0055] Equipment shutdown and cleaning:
[0056] After the packaging film is processed, the control unit 5 stops all components from working, and the pressing cylinder 304 moves the pressing arc plate 305 upward to loosen the edge of the film, making it easy to remove the processed film from the discharge roller group 403. Cleaning and maintaining the equipment can remove impurities, residual film, etc., ensuring that the equipment can operate normally the next time it is used and extending its service life.
[0057] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.
Claims
1. An automatic correction and tension control mechanism for packaging film, comprising a frame (1), characterized in that, The frame (1) is provided with a feeding assembly and a discharging assembly on both sides. The feeding assembly includes a feeding frame (201) fixedly connected to the frame (1). A feeding roller assembly (202) is rotatably mounted on the feeding frame (201). Pulling assemblies are provided on both sides of the feeding roller assembly (202) on the feeding frame (201). The pulling assembly includes an extension frame (301) fixedly connected to the feeding frame (201). A pulling electric cylinder (302) is mounted on the extension frame (301). A U-shaped pulling frame (303) is fixedly mounted on the pulling electric cylinder (302). The pull frame (303) is fixedly provided with pressing electric cylinders (304) on both sides. The moving part of the pressing electric cylinder (304) is fixedly provided with pressing arc plate (305). The discharge assembly includes an electric slide (401) provided on the frame (1). The moving part of the electric slide (401) is provided with a discharge rack (402) through a tension sensing component. The discharge rack (402) is provided with a discharge roller group (403). The frame (1) is provided with a control unit (5). The tension sensing component controls the movement of the electric slide (401) according to a preset tension range.
2. The automatic correction and tension control mechanism for packaging film according to claim 1, characterized in that, The tension sensing component includes a damping slide rail (602) fixedly mounted on the upper surface of the movable part of the electric slide table (401). Limiting plates (603) are fixedly mounted at both ends of the damping slide rail (602). The bottom of the discharge rack (402) is slidably connected to the damping slide rail (602). A buffer pad (604) is provided between the limiting plate (603) and the side wall of the discharge rack (402). A first pressure sensor (601) is provided in the buffer pad (604) near the feeding component. The first pressure sensor (601) controls the movement of the electric slide table (401) according to a preset tension range and through the control unit (5).
3. The automatic correction and tension control mechanism for packaging film according to claim 2, characterized in that, The working surface of the pressing arc plate (305) is coated with a wear-resistant coating.
4. The automatic correction and tension control mechanism for packaging film according to claim 3, characterized in that, A second pressure sensor (306) is provided between the pressing electric cylinder (304) and the pressing arc plate (305). The second pressure sensor (306) controls the extension and retraction of the pressing electric cylinder (304) according to the preset pressing pressure range and through the control unit (5).
5. The automatic correction and tension control mechanism for packaging film according to claim 4, characterized in that, The number of the pulling components is four, and the pulling components are respectively arranged on both sides of the inlet of the feed roller group (202) and both sides of the outlet of the feed roller group (202).
6. The automatic correction and tension control mechanism for packaging film according to claim 5, characterized in that, The electric slide (401) is configured as a ball screw type electric slide (401) driven by a servo motor.
7. The automatic correction and tension control mechanism for packaging film according to claim 6, characterized in that, The control unit (5) is configured as an editable logic controller.
8. A method of using an automatic web-alignment and tension control mechanism for packaging film, comprising using the automatic web-alignment and tension control mechanism for packaging film as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Equipment startup: Install the packaging film onto the feed roller group (202) and pull the film through the feed assembly and the discharge assembly in sequence to put the film in a ready-to-process state; start the control unit (5) to initialize each component, including setting the preset tension range, preset pressing pressure range, and the initial position parameters of the electric slide (401), the pull cylinder (302), and the pressing cylinder (304); Film feeding and initial fixation: The control unit (5) controls the start of the pull cylinder (302) in the feeding assembly. The pull cylinder (302) drives the pull frame (303) to move to a suitable position, so that the pull frame (303) is located above the film edge on both sides of the feeding roller group (202). Then the control unit (5) controls the start of the pressing cylinder (304). The moving part of the pressing cylinder (304) drives the pressing arc plate (305) to move downward. The pressing arc plate (305) presses on the film edge and fixes the film edge on the feeding frame (201). During the pressing process, the second pressure sensor (306) monitors the pressing pressure in real time and feeds the pressure data back to the control unit (5). When the pressing pressure reaches the preset pressing pressure range, the control unit (5) controls the pressing cylinder (304) to stop extending and retracting and maintain the current pressing state. Film correction operation: During the film feeding process, if the film deviates, the control unit (5) controls the corresponding pull cylinder (302) to extend and retract according to the direction and degree of film deviation; for example, if the film deviates to the left, the control unit (5) controls the pull cylinder (302) on the right side of the feed roller group (202) to shorten, and at the same time controls the pull cylinder (302) on the left side of the feed roller group (202) to extend. Through the pull frame (303) and the pressing arc plate (305), different directions of pulling force are applied to the edge of the film, so that the film gradually returns to the normal position and realizes the automatic correction function; Film tension control: After passing through the feeding assembly, the film enters the discharging assembly. During the discharging process, the tension sensing assembly monitors the film tension in real time. Specifically, when the film tension changes, the discharging rack (402) slides on the damping slide rail (602). The first pressure sensor (601) in the buffer pad (604) near the feeding assembly senses the pressure change and feeds the pressure data back to the control unit (5). The control unit (5) analyzes and judges the pressure data according to the preset tension range. If the pressure data exceeds the preset tension range, the control unit (5) 5) Control the movement of the electric slide (401). For example, when the film tension is too high, the control unit (5) controls the moving part of the electric slide (401) to move away from the feeding assembly, increasing the distance between the discharge roller group (403) and the feeding roller group (202), thereby reducing the film tension; when the film tension is too low, the control unit (5) controls the moving part of the electric slide (401) to move closer to the feeding assembly, reducing the distance between the discharge roller group (403) and the feeding roller group (202), increasing the film tension, so that the film tension is always kept within the preset tension range. Continuous operation and monitoring: During the continuous operation of the equipment, the control unit (5) repeatedly performs the above film correction operation and film tension control steps, monitors the film offset and tension changes in real time, and adjusts the working status of each component in a timely manner according to the monitoring results to ensure that the packaging film runs stably and with high quality in the automatic correction and tension control mechanism; at the same time, the operator can view the operating parameters of the equipment and the film status in real time through the display interface of the control unit (5) so as to make manual intervention and adjustment when necessary; Equipment Stop and Cleaning: After the packaging film is processed, the control unit (5) controls each component to stop working, the pressing cylinder (304) drives the pressing arc plate (305) to move upward, and releases the pressing on the edge of the film; the processed film is removed from the discharge roller group (403), and the equipment is cleaned and maintained to prepare for the next use.