Preparation control method and system of cellulose diacetate bundles

Abstract

The present application relates to the technical field of fiber preparation, and more particularly to a diacetate fiber tow preparation control method and system. The scheme includes setting the cross-sectional shape, linear density and smoke cavity of the cross section of the diacetate cellulose filament, setting the production process of the diacetate cellulose filament, and starting the production of the filament; by reducing and increasing the amount of filament filled in the smoke cavity, the filter rod with the smallest circumference and the filter rod with the largest circumference are obtained; the minimum filament feeding amount is extracted according to the filter rod with the smallest circumference; the maximum filament feeding amount is extracted according to the filter rod with the largest circumference; and the filament feeding amount is adjusted online according to the constraints of the minimum filament feeding amount and the maximum filament feeding amount. The scheme realizes precise weight control of the diacetate fiber tow preparation process by designing an evaluation of the fillable amount of the diacetate cellulose filament for a hollow filter rod and combining production process control.

Description

Technical Field

[0001] This invention relates to the field of fiber preparation technology, and more specifically, to a method and system for controlling the preparation of diacetate fiber bundles. Background Technology

[0002] Fiber fabrication is a crucial process in modern industry and technology, involving the transformation of natural or synthetic materials into long, flexible filaments. This process not only provides the basic raw materials for the textile industry but also has wide applications in fields such as medicine, construction, and aerospace. Fiber fabrication makes materials more durable and lightweight, while also improving their functionality, such as antibacterial and fire-retardant properties. Furthermore, by precisely controlling the structure and composition of fibers, new materials with specific properties can be designed to meet ever-changing technological and societal needs. Therefore, fiber fabrication is not only the foundation of industrial production but also a vital force driving technological progress and innovation.

[0003] Prior to this invention, the processing capability of conventional, medium, and slim cigarette tows was typically described by a fitted straight line relating the net filament weight of the filter rod to its pressure drop under rated processing speed, rated filter rod circumference, and rated filter rod length. This fitted straight line was called the tow characteristic curve. Considering that hollow filter rods have a hollow structure, the only processing indicator affected by the cellulose diacetate tow specifications is the filter rod weight, and there is no indicator for filter rod pressure drop. Therefore, the tow characteristic curve method is no longer sufficient for evaluation. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a method and system for controlling the preparation of cellulose diacetate bundles. By designing an assessment of the fillable amount of cellulose diacetate bundles for hollow filter rods, combined with the control of the preparation process, precise weight control of the cellulose diacetate bundle preparation process is achieved.

[0005] According to a first aspect of the present invention, a method for controlling the preparation of diacetate fiber bundles is provided.

[0006] In one or more embodiments, preferably, the method for controlling the preparation of the diacetate fiber bundle includes:

[0007] The cross-sectional shape, linear density, and smoke cavity of the monofilament of the cellulose diacetate tow are determined;

[0008] Set up the process for making cellulose diacetate tows and start the tow making process;

[0009] By reducing and increasing the amount of fiber bundle filled into the smoke chamber, filter rods with the smallest and largest circumferences can be obtained.

[0010] Extract the minimum filament feed amount based on the filter rod with the smallest circumference;

[0011] Extract the maximum fiber feed amount based on the filter rod with the largest circumference;

[0012] The fiber feed rate is adjusted online based on the constraints of the minimum and maximum fiber feed rates.

[0013] In one or more embodiments, preferably, the cross-sectional shape, linear density, and smoke cavity of the monofilament cross-section of the cellulose diacetate tow specifically include:

[0014] The monofilament cross-sectional shape of the cellulose diacetate bundle includes X-shape, Y-shape and O-shape;

[0015] The linear density of a single fiber in a cellulose diacetate tow shall not be less than 6.0 denier;

[0016] The linear density of the cellulose diacetate filament bundles used in hollow filter rods is not less than 22,000 denier, and the cross-sectional shape of the monofilaments includes X-shape, Y-shape and O-shape.

[0017] Based on the outer circumference of the target hollow filter rod, select a smoke chamber whose processing range covers the circumference of the filter rod.

[0018] In one or more embodiments, preferably, the process of setting up the cellulose diacetate tow and initiating the tow production specifically includes:

[0019] Open the primary air opener to initially loosen the filament bundle;

[0020] Open the secondary air opener to enhance the looseness of the fiber bundle through airflow, ensuring a more even distribution of fibers;

[0021] By adjusting the pressure of the roller pair, an appropriate tension is applied to the filament bundle;

[0022] After the input roller pair, the opening roller pair, through the action of stronger airflow, completes the final opening of the filament bundle.

[0023] Plasticizer bins and feed rollers ensure that the filaments enter the molding process in optimal condition.

[0024] In one or more embodiments, preferably, obtaining filter rods with the smallest and largest circumferences by reducing and increasing the amount of fiber bundle filled into the smoke chamber specifically includes:

[0025] Select several controllable target processing ranges for the same smoke chamber;

[0026] During the processing, as the weight of the filament bundle increases, the circumference of the filter rod will gradually increase until the filament bundle accumulates at the conveying port and can no longer be filled, thus obtaining an upper limit for filament bundle filling. At this point, the circumference of the filter rod corresponds to the filter rod with the maximum circumference.

[0027] As the weight of the filament bundle decreases, the circumference of the filter rod gradually decreases until the filament bundle is broken at the feed port and can no longer be filled, thus obtaining a lower limit for filament bundle filling. At this point, the circumference of the filter rod corresponds to the filter rod with the smallest circumference.

[0028] In one or more embodiments, preferably, the extraction of the minimum fiber feed amount based on the filter rod with the minimum circumference specifically includes:

[0029] Extract the net content of the fiber bundle in the filter rod corresponding to the smallest circumference;

[0030] The minimum amount of cellulose acetate fiber bundles fed into a hollow filter rod under selected smoke chamber conditions is expressed by the net content of the fiber bundles in the filter rod corresponding to the smallest circumference.

[0031] In one or more embodiments, preferably, the extraction of the maximum filament feed amount based on the filter rod with the maximum circumference specifically includes:

[0032] Extract the net content of the fiber bundle in the filter rod corresponding to the filter rod with the largest circumference;

[0033] The maximum amount of cellulose acetate fiber tow fed into a hollow filter rod under selected smoke chamber conditions is expressed by the net content of the fiber bundle in the filter rod corresponding to the filter rod with the largest circumference.

[0034] In one or more embodiments, preferably, the online adjustment of the filament feed amount based on the constraints of the minimum and maximum filament feed amounts specifically includes:

[0035] The system is equipped with an industrial computer, PLC, industrial camera, servo motor, and monitor to automatically control the wire feeding amount.

[0036] Based on real-time data collected regarding the filament feed rate and filter rod circumference, the system automatically calculates and adjusts the filament feed rate according to a preset linear relationship to maintain it between the preset minimum and maximum filament feed rates.

[0037] By conducting quality inspections on the produced filter rods and feeding the results back to the control system, the preset linear relationship is continuously optimized into an adjustment strategy for the fiber tow feed amount.

[0038] According to a second aspect of the present invention, a control system for the preparation of cellulose diacetate bundles is provided.

[0039] In one or more embodiments, preferably, the preparation control system for the diacetate cellulose tow includes:

[0040] The smoke chamber specification selection and design module is used to set the cross-sectional shape, linear density, and smoke chamber of the monofilament of the cellulose diacetate tow.

[0041] Start the production module to set up the production process of cellulose diacetate tow and start the production of the tow;

[0042] The filter rod rolling module is used to obtain filter rods with the smallest and largest circumference by reducing and increasing the amount of wire bundle filled into the smoke chamber.

[0043] The minimum fiber feed amount determination module is used to extract the minimum fiber feed amount based on the minimum circumference of the filter rod;

[0044] The maximum fiber feed rate determination module is used to extract the maximum fiber feed rate based on the filter rod with the maximum circumference.

[0045] The online control yarn feeding module is used to adjust the yarn feed rate online according to the constraints of the minimum and maximum yarn feed rates.

[0046] According to a third aspect of the present invention, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the method as described in any one of the first aspects of the present invention.

[0047] According to a fourth aspect of the present invention, an electronic device is provided, including a memory and a processor, wherein the memory is used to store one or more computer program instructions, wherein the one or more computer program instructions are executed by the processor to implement the method described in any one aspect of the present invention.

[0048] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0049] The present invention provides a method for evaluating the fillable amount of cellulose diacetate filaments for hollow filter rods, thereby achieving precise control over the preparation process.

[0050] In this invention, a compressed nozzle is used to blow the loosened filament bundle into the smoke chamber of a filter rod forming machine with a selected filter rod circumference. The circumference is not controlled; the minimum weight filter rod and the maximum weight filter rod are produced simply by reducing and increasing the amount of filament bundle filled into the smoke chamber.

[0051] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0052] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a flowchart of a method for controlling the preparation of diacetate fiber bundles according to an embodiment of the present invention.

[0055] Figure 2 This is a flowchart illustrating the cross-sectional shape, linear density, and smoke cavity of the monofilament cross-section of the cellulose diacetate bundle in a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0056] Figure 3 This is a flowchart illustrating the process of setting up and initiating the fabrication of cellulose diacetate bundles in a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0057] Figure 4 This is a flowchart illustrating a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention, which involves reducing and increasing the amount of bundles filled into the smoke chamber to obtain filter rods with the smallest and largest circumferences.

[0058] Figure 5 This is a flowchart illustrating the extraction of the minimum fiber bundle feeding amount based on the filter rod with the smallest circumference in the preparation control method of cellulose diacetate bundle according to an embodiment of the present invention.

[0059] Figure 6 This is a flowchart illustrating the extraction of the maximum fiber bundle feeding amount based on the filter rod with the largest circumference in the preparation control method of cellulose diacetate bundle according to an embodiment of the present invention.

[0060] Figure 7 This is a flowchart illustrating the online adjustment of the fiber tow feed amount based on constraints of minimum and maximum fiber tow feed amounts in a method for controlling the preparation of diacetate fiber tow according to an embodiment of the present invention.

[0061] Figure 8 This is a structural diagram of a control system for the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0062] Figure 9 This is a structural diagram of an electronic device according to one embodiment of the present invention. Detailed Implementation

[0063] In some of the processes described in the specification, claims, and accompanying drawings of this invention, multiple operations appearing in a specific order are included. However, it should be clearly understood that these operations may not be executed in the order they appear herein, or may be executed in parallel. The operation numbers, such as 101, 102, etc., are merely used to distinguish different operations and do not represent any execution order. Furthermore, these processes may include more or fewer operations, and these operations may be executed sequentially or in parallel. It should be noted that the descriptions such as "first," "second," etc., in this document are used to distinguish different messages, devices, modules, etc., and do not represent a sequential order, nor do they limit "first" and "second" to different types.

[0064] 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.

[0065] Fiber fabrication is a crucial process in modern industry and technology, involving the transformation of natural or synthetic materials into long, flexible filaments. This process not only provides the basic raw materials for the textile industry but also has wide applications in fields such as medicine, construction, and aerospace. Fiber fabrication makes materials more durable and lightweight, while also improving their functionality, such as antibacterial and fire-retardant properties. Furthermore, by precisely controlling the structure and composition of fibers, new materials with specific properties can be designed to meet ever-changing technological and societal needs. Therefore, fiber fabrication is not only the foundation of industrial production but also a vital force driving technological progress and innovation.

[0066] Prior to this invention, the processing capability of conventional, medium, and slim cigarette tows was typically described by a fitted straight line relating the net filament weight of the filter rod to its pressure drop under rated processing speed, rated filter rod circumference, and rated filter rod length. This fitted straight line was called the tow characteristic curve. Considering that hollow filter rods have a hollow structure, the only processing indicator affected by the cellulose diacetate tow specifications is the filter rod weight, and there is no indicator for filter rod pressure drop. Therefore, the tow characteristic curve method is no longer sufficient for evaluation.

[0067] This invention provides a method and system for controlling the preparation of cellulose diacetate tows. This method achieves precise weight control during the preparation of cellulose diacetate tows by designing an assessment of the fillable amount of cellulose diacetate tows for hollow filter rods, combined with process control.

[0068] According to a first aspect of the present invention, a method for controlling the preparation of diacetate fiber bundles is provided.

[0069] Figure 1 This is a flowchart of a method for controlling the preparation of diacetate fiber bundles according to an embodiment of the present invention.

[0070] In one or more embodiments, preferably, the method for controlling the preparation of the diacetate fiber bundle includes:

[0071] S101. Set the cross-sectional shape, linear density, and smoke chamber of the monofilament cross-section of the cellulose diacetate tow;

[0072] S102. Set up the process for making cellulose diacetate tow and start the tow making process;

[0073] S103. By reducing and increasing the amount of fiber bundle filled into the smoke chamber, filter rods with the smallest and largest circumferences are obtained.

[0074] S104. Extract the minimum fiber feed amount based on the filter rod with the minimum circumference;

[0075] S105. Extract the maximum fiber feed amount based on the filter rod with the maximum circumference;

[0076] S106. Adjust the fiber feed rate online according to the constraints of the minimum and maximum fiber feed rates.

[0077] In this embodiment of the invention, the evaluation of existing filter rods is carried out under selected target circumference conditions (for example, if the target circumference is 24mm, the evaluation requires control of the circumference ±0.05mm). Under a fixed circumference, there is an upper limit to the weight of the fillable cellulose tow in the filter rod; exceeding this limit, it becomes impossible to form a rod within the target circumference. This solution specifically relates to a method for evaluating and controlling cellulose diacetate cellulose tow for hollow filter rods. This method includes core steps such as selecting the smoke chamber specifications, loosening the cellulose tow, and rolling the filter rod, solving the problem of the inability to evaluate and control the controllable weight of the cellulose diacetate cellulose tow for hollow filter rods during the tow production process.

[0078] Figure 2 This is a flowchart illustrating the cross-sectional shape, linear density, and smoke cavity of the monofilament cross-section of the cellulose diacetate bundle in a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0079] like Figure 2 As shown, in one or more embodiments, preferably, the cross-sectional shape, linear density, and smoke cavity of the monofilament cross-section of the cellulose diacetate tow specifically include:

[0080] S201. The monofilament cross-sectional shape of the cellulose diacetate bundle includes X-shape, Y-shape and O-shape;

[0081] S202. The linear density of a single fiber in a cellulose diacetate tow shall not be less than 6.0 denier.

[0082] S203. The linear density of cellulose diacetate filament bundles used in hollow filter rods shall not be less than 22,000 denier, wherein the cross-sectional shape of the monofilament bundles includes X-shape, Y-shape and O-shape.

[0083] S204. Based on the outer circumference of the target hollow filter rod, select a smoke chamber whose processing range covers the circumference of the filter rod.

[0084] In this embodiment of the invention, preferably, the linear density of a single fiber in the cellulose diacetate tow is 6.0 denier to 10.0 denier, and the linear density of the cellulose diacetate tow is 22,000 denier to 75,000 denier. The processing technology of hollow profiled filter rods differs from that of molded smoke chambers in our daily evaluation; it involves extrusion molding. Therefore, even if the circumference and control precision are selected during processing, the upper and lower limits of the fillable weight will be wider than the conventional fill amount.

[0085] Figure 3 This is a flowchart illustrating the process of setting up and initiating the fabrication of cellulose diacetate bundles in a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0086] like Figure 3 As shown, in one or more embodiments, preferably, the process of setting up the cellulose diacetate tow and initiating the tow production specifically includes:

[0087] S301. Open the primary air opener to initially loosen the filament bundle;

[0088] S302. Open the secondary air opener to enhance the looseness of the fiber bundle through airflow, ensuring a more uniform fiber distribution.

[0089] S303. Apply appropriate tension to the filament bundle by adjusting the pressure of the roller pair;

[0090] S304, the opening roller pair after the input roller pair, through the action of stronger airflow, completes the final opening of the filament bundle.

[0091] S305. The plasticizer box and feed rollers ensure that the filaments enter the molding process in the best condition.

[0092] In this embodiment of the invention, the fiber tow opening step specifically involves passing the cellulose diacetate fiber tow for hollow filter rods sequentially through a primary air opener, a secondary air opener, a pre-tension roller pair, an input roller pair, an opening roller pair, a tertiary air opener, a plasticizer box, and a fiber feeding roller pair. The preparation of cellulose diacetate fiber tow and its application in hollow filter rod production is a highly specialized process. The significance and function of the series of processing steps for the cellulose diacetate fiber tow are explained in detail below: Primary air opener: Purpose: To initially open the fiber tow, reducing fiber adhesion and preparing it for subsequent processing. Function: Through the action of airflow, the fibers in the fiber tow are initially loosened, improving fiber softness and processability. Secondary air opener: Purpose: To further enhance the degree of fiber tow opening. Function: Based on the primary opening, the airflow further enhances the loosening of the fiber tow, ensuring a more uniform fiber distribution. Pre-tension roller pair: Purpose: To adjust the tension of the fiber tow to a state suitable for subsequent processing. Functions: **Input Roller Pair:** **Purpose:** To smoothly guide the filament bundle into the next process by adjusting the pressure of the roller pair. **Function:** To act as a transition for the filament bundle into the next process, ensuring smooth transport and preventing wrinkles or damage. **Opening Roller Pair:** **Purpose:** To further refine the opening process of the filament bundle. **Function:** Through the mechanical action of the roller pair, the filament bundle is further loosened, resulting in a more uniform fiber distribution and providing conditions for final shaping. **Three-Stage Air Opener:** **Purpose:** To achieve the final opening of the filament bundle. **Function:** Building upon the first two stages of air opening, a stronger airflow completes the final opening of the filament bundle, ensuring optimal fiber condition. **Plasticizer Tank:** **Purpose:** To increase the plasticity of the filament bundle, facilitating shaping. **Function:** Through the action of plasticizers, the plasticity of the filament bundle is improved, making it easier to form the desired shape in subsequent shaping processes. **Feeding Roller Pair:** **Purpose:** To feed the processed filament bundle into the forming machine. Function: As the final step before the cellulose diacetate tow enters the forming machine, this step ensures the tow enters the forming process in optimal condition, directly impacting the quality of the final product. These steps are designed to ensure that the cellulose diacetate tow achieves optimal processing conditions and product quality during the manufacturing of hollow filter rods.

[0093] Figure 4 This is a flowchart illustrating a method for controlling the preparation of cellulose diacetate bundles according to an embodiment of the present invention, which involves reducing and increasing the amount of bundles filled into the smoke chamber to obtain filter rods with the smallest and largest circumferences.

[0094] like Figure 4 As shown, in one or more embodiments, preferably, obtaining filter rods with the smallest and largest circumferences by reducing and increasing the amount of fiber bundle filled into the smoke chamber specifically includes:

[0095] S401. Select several controllable target processing ranges for the same smoke chamber;

[0096] S402. During the processing, as the weight of the filament bundle increases, the circumference of the filter rod will gradually increase until the filament bundle accumulates at the conveying port and can no longer be filled, thus obtaining an upper limit for filament bundle filling. At this time, the circumference of the filter rod corresponds to the filter rod with the maximum circumference.

[0097] S403. As the weight of the filament bundle decreases, the circumference of the filter rod will gradually decrease until the filament bundle is broken at the conveying port and can no longer be filled, thus obtaining a lower limit for filament bundle filling. At this time, the circumference of the filter rod corresponds to the filter rod with the smallest circumference.

[0098] In this embodiment of the invention, different controllable target processing ranges can be selected for the same set of smoke chambers, such as 23.80mm-24.20mm. If the above-mentioned circumferential control is abandoned during processing, the circumference of the filter rod will gradually increase as the weight of the filament bundle increases, potentially exceeding 24.20mm to 24.30mm-24.50mm. However, the circumferential control cannot meet the ±0.05mm requirement until the filament bundle accumulates at the conveying port and can no longer be filled, resulting in an upper limit for filament bundle filling. As the weight of the filament bundle decreases, the circumference of the filter rod will gradually decrease, potentially exceeding 23.80mm to 23.50mm-23.70mm. However, the circumferential control cannot meet the ±0.05mm requirement until the filament bundle is broken at the conveying port and can no longer be filled, resulting in a lower limit for filament bundle filling.

[0099] Figure 5 This is a flowchart illustrating the extraction of the minimum fiber bundle feeding amount based on the filter rod with the smallest circumference in the preparation control method of cellulose diacetate bundle according to an embodiment of the present invention.

[0100] like Figure 5 As shown, in one or more embodiments, preferably, the extraction of the minimum fiber feed amount based on the filter rod with the smallest circumference specifically includes:

[0101] S501. Extract the net content of the fiber bundle in the filter rod corresponding to the smallest circumference;

[0102] S502. The minimum amount of cellulose acetate fiber tow fed into the hollow filter rod under the selected smoke chamber conditions is expressed by the net content of the fiber tow in the filter rod corresponding to the smallest circumference.

[0103] In this embodiment of the invention, the circumference of the filter rod directly affects its filtration efficiency and the taste of the smoke. Determining the minimum circumference helps ensure product consistency and quality, avoiding quality problems caused by circumferences that are too large or too small. By determining the minimum circumference, the amount of fiber used can be optimized while meeting product performance requirements, thereby controlling costs and improving production efficiency. The method for extracting the net content involves collecting data on the circumference of the filter rod and the corresponding fiber feed amount during the production process. Statistical analysis methods, such as regression analysis, are used to determine the net fiber content required to produce the filter rod with the minimum circumference. This includes considering factors such as fiber density and humidity, and how they affect the circumference of the final product. The determined minimum net fiber content is standardized as the target feed amount when producing hollow filter rods. This helps ensure consistent product quality across different production batches and conditions. In actual production, it may be necessary to dynamically adjust the minimum fiber feed amount based on changes in environmental conditions (such as humidity and temperature) and raw material characteristics to maintain product quality stability. Through the above analysis and methods, the net content of the fiber bundle in the filter rod corresponding to the smallest circumference can be extracted and expressed as the minimum fiber bundle feeding amount of diacetate fiber bundle for hollow filter rod under selected smoke chamber conditions.

[0104] Figure 6 This is a flowchart illustrating the extraction of the maximum fiber bundle feeding amount based on the filter rod with the largest circumference in the preparation control method of cellulose diacetate bundle according to an embodiment of the present invention.

[0105] like Figure 6 As shown, in one or more embodiments, preferably, the extraction of the maximum fiber feed amount based on the filter rod with the maximum circumference specifically includes:

[0106] S601. Extract the net content of the fiber bundle in the filter rod corresponding to the filter rod with the largest circumference;

[0107] S602. The maximum amount of diacetate fiber tow fed into the hollow filter rod under the selected smoke chamber conditions is expressed by the net content of the fiber tow in the filter rod corresponding to the filter rod with the largest circumference.

[0108] In this embodiment of the invention, the circumference of the filter rod can be adjusted by precisely controlling the feeding amount of cellulose acetate tow during manufacturing. Increasing the tow feeding amount generally increases the circumference of the filter rod, while decreasing it decreases it. Using advanced measuring equipment, the size of the filter rod can be monitored in real time during production, ensuring that each filter rod meets the preset specifications. These technologies allow manufacturers to accurately know the exact amount of tow required to achieve a specific circumference. Filter rods with the largest circumference typically offer better filtration efficiency and different smoking resistance, which is crucial for meeting the needs of different consumers. While increasing the circumference may increase the amount of tow used, this goal can be achieved without significantly increasing costs by optimizing the production process and tow utilization. Furthermore, the process of extracting the net tow content from the filter rod with the largest circumference involves collecting data on the filter rods with the largest circumference during production, including information on tow feeding amount, environmental conditions, and tow characteristics, and using statistical analysis methods to determine the net tow content required to produce the largest circumference. In actual production, experiments are conducted to adjust the fiber tow feed rate and observe its impact on the circumference of the filter rod, thereby finding the optimal fiber tow feed rate to achieve the maximum circumference. The net fiber tow content in the filter rod with the maximum circumference is converted into a production standard, serving as the maximum fiber tow feed rate to be used in different production batches, which helps maintain product performance consistency. The maximum fiber tow feed rate is adjusted according to actual production conditions (such as changes in raw materials, ambient humidity, and temperature) to ensure that the quality of the filter rod is not affected. In summary, through the above steps, manufacturers can not only ensure the production of filter rods with the maximum circumference that meet quality standards, but also effectively control production costs and improve production efficiency.

[0109] Figure 7 This is a flowchart illustrating the online adjustment of the fiber tow feed amount based on constraints of minimum and maximum fiber tow feed amounts in a method for controlling the preparation of diacetate fiber tow according to an embodiment of the present invention.

[0110] like Figure 7 As shown, in one or more embodiments, preferably, the online adjustment of the filament feed amount based on the constraints of the minimum and maximum filament feed amounts specifically includes:

[0111] S701, set up an industrial computer, PLC, industrial camera, servo motor and display to automatically control the wire feeding amount;

[0112] S702. Based on the real-time collected data on the fiber feed rate and filter rod circumference, the fiber feed rate is automatically calculated and adjusted according to a preset linear relationship to maintain it between the preset minimum and maximum fiber feed rates.

[0113] S703: By conducting quality inspections on the produced filter rods and feeding the results back to the control system, the preset linear relationship is continuously optimized into an adjustment strategy for the fiber feed amount.

[0114] In this embodiment of the invention, an automated control system is established, comprising an industrial computer, a PLC (Programmable Logic Controller), an industrial camera, servo motors, and a display. These components work together to achieve real-time monitoring and adjustment of the fiber tow feed rate on the production line. Furthermore, through sensors and industrial cameras installed on the production line, the system can collect data in real time regarding the fiber tow feed rate, filter rod circumference, and other relevant parameters. Based on the collected data, the system automatically calculates and adjusts the fiber tow feed rate to maintain it between a preset minimum and maximum value. Dedicated software based on fuzzy logic or neural network technology is developed to process the collected data and automatically adjust the fiber tow feed rate according to a preset algorithm. The industrial camera captures multi-target images on the production line, including images of the fiber tow feed point and the filter rod forming section. Based on changes in the real-time conveying speed of the production line, the system automatically adjusts the camera frame rate and exposure time parameters to ensure accurate measurement of the fiber tow feed rate. By continuously adjusting the fiber tow feed rate, the production process is optimized, improving the quality and production efficiency of the filter rods. Quality inspection of the produced filter rods is performed, and the results are fed back to the control system to further optimize the fiber tow feed rate adjustment strategy. Based on feedback, the parameter settings of the control system are continuously adjusted and optimized to achieve continuous improvement of the production process.

[0115] According to a second aspect of the present invention, a control system for the preparation of cellulose diacetate bundles is provided.

[0116] Figure 8 This is a structural diagram of a control system for the preparation of cellulose diacetate bundles according to an embodiment of the present invention.

[0117] In one or more embodiments, preferably, the preparation control system for the diacetate cellulose tow includes:

[0118] The smoke chamber specification selection and design module 801 is used to set the cross-sectional shape, linear density and smoke chamber of the monofilament cross section of the cellulose diacetate tow;

[0119] Start the production module 802, which is used to set the production process of cellulose diacetate tow and start the production of the tow;

[0120] The filter rod rolling module 803 is used to obtain filter rods with the smallest and largest circumferences by reducing and increasing the amount of wire bundle filled into the smoke chamber.

[0121] Minimum fiber feed amount determination module 804 is used to extract the minimum fiber feed amount based on the minimum circumference of the filter rod;

[0122] The maximum fiber feed amount determination module 805 is used to extract the maximum fiber feed amount based on the filter rod with the maximum circumference.

[0123] The online control yarn feeding module 806 is used to adjust the yarn feed rate online according to the constraints of the minimum yarn feed rate and the maximum yarn feed rate.

[0124] In this embodiment of the invention, a system suitable for different structures is realized through a series of modular designs. This system can achieve closed-loop, reliable, and efficient execution through data acquisition, analysis, and control.

[0125] According to a third aspect of the present invention, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the method as described in any one of the first aspects of the present invention.

[0126] According to a fourth aspect of the present invention, an electronic device is provided. Figure 9 This is a structural diagram of an electronic device according to one embodiment of the present invention. Figure 9 The illustrated electronic device is a general-purpose control device for the preparation of cellulose diacetate tows, comprising a general-purpose computer hardware structure, including at least a processor 901 and a memory 902. The processor 901 and memory 902 are connected via a bus 903. The memory 902 is adapted to store instructions or programs executable by the processor 901. The processor 901 can be a standalone microprocessor or a collection of one or more microprocessors. Thus, the processor 901 executes the instructions stored in the memory 902, thereby performing the method flow of the embodiments of the present invention as described above to process data and control other devices. The bus 903 connects the aforementioned components together, and also connects these components to a display controller 904, a display device, and an input / output (I / O) device 905. The input / output (I / O) device 905 can be a mouse, keyboard, modem, network interface, touch input device, motion-sensing input device, printer, and other devices known in the art. Typically, the input / output device 905 is connected to the system via an input / output (I / O) controller 906.

[0127] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0128] The present invention provides a method for evaluating the fillable amount of cellulose diacetate filaments for hollow filter rods, thereby achieving precise control over the preparation process.

[0129] In this invention, a compressed nozzle is used to blow the loosened filament bundle into the smoke chamber of a filter rod forming machine with a selected filter rod circumference. The circumference is not controlled; the minimum weight filter rod and the maximum weight filter rod are produced simply by reducing and increasing the amount of filament bundle filled into the smoke chamber.

[0130] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0131] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0132] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0133] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0134] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of controlling the preparation of diacetate fiber tows, characterized in that, The method comprises: Setting the cross-sectional shape, linear density and tobacco cavity of the cross-section of the cellulose diacetate filament bundle; Setting the production process of the cellulose diacetate filament bundle, and starting the production of the filament bundle; Obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of filament bundle filled into the tobacco cavity; Extracting the minimum filament bundle feeding amount according to the filter rod with the minimum circumference; Extracting the maximum filament bundle feeding amount according to the filter rod with the maximum circumference; Adjusting the filament bundle feeding amount online according to the constraints of the minimum filament bundle feeding amount and the maximum filament bundle feeding amount; Wherein, the obtaining of the filter rod with the minimum circumference and the filter rod with the maximum circumference by reducing and increasing the amount of filament bundle filled into the tobacco cavity specifically comprises: Selecting several controllable target processing ranges for the same tobacco cavity; As the weight of the filament bundle increases during the processing, the circumference of the filter rod will gradually increase until the filament bundle is accumulated in the delivery port and cannot be filled any more, obtaining an upper limit of filament bundle filling, and at this time the circumference of the corresponding filter rod corresponds to the filter rod with the maximum circumference; As the weight of the filament bundle decreases, the circumference of the filter rod will gradually decrease until the filament bundle is broken in the delivery port and cannot be filled any more, obtaining a lower limit of filament bundle filling, and at this time the circumference of the corresponding filter rod corresponds to the filter rod with the minimum circumference; Wherein, the extracting of the minimum filament bundle feeding amount according to the filter rod with the minimum circumference specifically comprises: Extracting the net content of the filament bundle in the filter rod corresponding to the filter rod with the minimum circumference; Expressing the minimum filament bundle feeding amount of the hollow filter rod using cellulose diacetate filament bundle under the selected tobacco cavity condition by the net content of the filament bundle in the filter rod corresponding to the filter rod with the minimum circumference; wherein, the extracting of the maximum filament bundle feeding amount according to the filter rod with the maximum circumference specifically comprises: Extracting the net content of the filament bundle in the filter rod corresponding to the filter rod with the maximum circumference; Expressing the maximum filament bundle feeding amount of the hollow filter rod using cellulose diacetate filament bundle under the selected tobacco cavity condition by the net content of the filament bundle in the filter rod corresponding to the filter rod with the maximum circumference; Wherein, the adjusting of the filament bundle feeding amount online according to the constraints of the minimum filament bundle feeding amount and the maximum filament bundle feeding amount specifically comprises: Setting the industrial computer, PLC, industrial camera, servo motor and display to automatically control the amount of filament; According to the real-time collected filament bundle feeding amount and filter rod circumference, automatically calculating and adjusting the filament bundle feeding amount according to the preset linear relationship to maintain between the preset minimum filament bundle feeding amount and the maximum filament bundle feeding amount; Through quality detection on the produced filter rod, the results are fed back to the control system, and the preset linear relationship is continuously optimized as the adjustment strategy of the filament bundle feeding amount.

2. The method for controlling the preparation of diacetate fiber bundles as described in claim 1, characterized in that, The setting of the cross-sectional shape, linear density and tobacco cavity of the cross-section of the cellulose diacetate filament bundle specifically comprises: Setting the cross-sectional shape of the cellulose diacetate filament bundle includes X-shaped, Y-shaped and 0-shaped; The linear density of the single fiber in the cellulose diacetate filament bundle is not less than 6.0 denier; The linear density of the cellulose diacetate filament bundle for hollow filter rod is not less than 22000 denier, wherein the cross-sectional shape of the single filament of the filament bundle includes X-shaped, Y-shaped and 0-shaped; According to the target outer circumference of the hollow filter rod, a tobacco cavity with a processing range covering the circumference of the filter rod is selected.

3. The method for controlling the preparation of diacetate fiber bundles as described in claim 1, characterized in that, The setting of the production process of the cellulose diacetate filament bundle and the starting of the production of the filament bundle specifically comprises: Open the primary air opener to preliminarily open the filament bundle; Opening the secondary air opener, the degree of opening of the tow is enhanced by the air flow, ensuring that the fibers are more evenly distributed; Applying the appropriate tension to the tow by adjusting the pressure of the roller pair; Final opening of the tow is achieved by the post-roller pair opener, through the action of a stronger air flow; Ensuring that the tow enters the forming process in the best possible condition through the plasticizer tank and the godet pair.

4. A system for controlling the production of diacetate fiber tows, characterized by, The system is used to implement the method as claimed in any one of claims 1-3, the system comprising: A smoke cavity specification selection and design module for setting the cross-sectional shape, linear density and smoke cavity of the cross section of the individual filaments of the cellulose diacetate tow; A start production module for setting the production process of the cellulose diacetate tow and starting the production of the tow; A filter rod rolling module for obtaining filter rods of the minimum circumference and filter rods of the maximum circumference by reducing and increasing the amount of tow filled into the smoke cavity; A minimum tow feed amount determination module for minimum tow feed amount extraction according to the filter rod of the minimum circumference; A maximum tow feed amount determination module for maximum tow feed amount extraction according to the filter rod of the maximum circumference; An online control tow feeding module for online adjustment of the tow feed amount according to the constraints of the minimum tow feed amount and the maximum tow feed amount.

5. A computer readable storage medium having stored thereon computer program instructions, wherein, The computer program instructions, when executed by the processor, implement the method as claimed in any one of claims 1-3.

6. An electronic device comprising a memory and a processor, characterized in that The memory is used to store one or more computer program instructions, wherein the one or more computer program instructions are executed by the processor to implement the method as claimed in any one of claims 1-3.

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