Preparation control method and system of cellulose diacetate tow

Abstract

The invention relates to the technical field of fiber preparation, in particular to a preparation control method and system for diacetate fiber tows. According to the scheme, the section shape, the linear density and the smoke cavity of the monofilament section of the cellulose diacetate tow are set; setting a manufacturing process of cellulose diacetate tows, and starting manufacturing of the tows; the filter stick with the minimum circumference and the filter stick with the maximum circumference are manufactured by reducing and increasing the amount of the tows filled in the cigarette cavity; extracting the minimum tow feeding quantity according to the filter stick with the minimum circumference; extracting the maximum tow feeding quantity according to the filter stick with the maximum circumference; and adjusting the tow feeding quantity on line according to the constraint of the minimum tow feeding quantity and the maximum tow feeding quantity. According to the scheme, by evaluating the filling amount of the cellulose diacetate tow for the hollow filter stick and combining control over the preparation process, accurate weight control over the preparation process of the cellulose diacetate tow is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber preparation, and more specifically, to a preparation control method and system for diacetate fiber tows. Background Art

[0002] Fiber preparation is a key process in modern industry and technology, which involves converting natural or synthetic materials into slender, flexible filaments. This process not only provides the basic raw materials for the textile industry, but is also widely used in many fields such as medicine, construction, and aerospace. Fiber preparation makes materials more durable and lightweight, while improving their functionality, such as antibacterial and fireproof properties. In addition, by precisely controlling the structure and composition of fibers, new materials with specific properties can be designed to meet the ever-changing technological and social needs. Therefore, fiber preparation is not only the basis of industrial production, but also an important force to promote scientific and technological progress and innovation.

[0003] Prior to the present invention, for conventional, medium and slim cigarette tows, the processing capacity is usually described by a straight line fitting the relationship between the net filter rod volume and the filter rod pressure drop under the conditions of rated processing speed, rated filter rod circumference and rated filter rod length. This straight line is called a tow characteristic curve. Considering that the hollow filter rod is a hollow structure, the only indicator in the processing process that is affected by the specifications of the cellulose diacetate tow is the filter rod weight, and there is no indicator for the filter rod pressure drop. Therefore, the tow characteristic curve method can no longer meet the evaluation requirements. Summary of the invention

[0004] In view of the above problems, the present invention proposes a preparation control method and system for diacetate cellulose tow, which realizes precise weight control of the diacetate cellulose tow preparation process by designing an evaluation method for the filling amount of diacetate cellulose tow for hollow filter rods and combining it with preparation process control.

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

[0006] In one or more embodiments, preferably, the preparation control method of the diacetate fiber tow includes:

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

[0008] Setting up the cellulose diacetate tow production process and starting tow production;

[0009] By reducing and increasing the amount of tow filled into the smoke cavity, a filter rod with the smallest circumference and a filter rod with the largest circumference are obtained;

[0010] Extraction of minimum tow feed quantity based on the filter rod with the smallest circumference;

[0011] Extraction of maximum tow feed quantity based on the filter rod with the largest circumference;

[0012] The tow feed amount is adjusted online according to the constraints of the minimum tow feed amount and the maximum tow feed amount.

[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 are set, specifically including:

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

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

[0016] The linear density of the cellulose acetate tow for hollow filter rods shall not be less than 22,000 deniers, wherein the cross-sectional shapes of the single filaments of the tow include X-shaped, Y-shaped and O-shaped;

[0017] According to the outer circumference of the target hollow filter rod, a smoke cavity whose processing range covers the circumference of the filter rod is selected.

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

[0019] Open the primary air opener to initially open the tow;

[0020] Turn on the secondary air opener to loosen the tow through airflow, ensuring a more even distribution of fibers.

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

[0022] The opening roller pair after the input roller pair completes the final opening of the tow through the stronger airflow

[0023] The plasticizer box and the wire feeding roller pair ensure that the wire bundle enters the molding process in the best condition.

[0024] In one or more embodiments, preferably, the method of obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity specifically includes:

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

[0026] During the processing, as the weight of the tow increases, the circumference of the filter rod will gradually increase until the tow accumulates at the delivery port and cannot be filled any further, resulting in an upper limit of tow filling. At this time, the circumference of the filter rod corresponds to the filter rod with the largest circumference;

[0027] As the weight of the tow decreases, the circumference of the filter rod will gradually decrease until the tow is broken at the delivery port and can no longer be filled, obtaining a tow filling lower limit. At this time, the circumference of the corresponding filter rod corresponds to the filter rod with the smallest circumference.

[0028] In one or more embodiments, preferably, the extracting of the minimum tow feed amount according to the filter rod with the minimum circumference specifically includes:

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

[0030] The net content of the tow in the filter rod corresponding to the filter rod with the smallest circumference is used to represent the minimum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

[0031] In one or more embodiments, preferably, the extracting of the maximum tow feed amount according to the filter rod with the largest circumference specifically includes:

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

[0033] The net content of the tow in the filter rod corresponding to the filter rod with the largest circumference is used to indicate the maximum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

[0034] In one or more embodiments, preferably, the online adjustment of the tow feed amount according to the constraints of the minimum tow feed amount and the maximum tow feed amount specifically includes:

[0035] Set up industrial computers, PLCs, industrial cameras, servo motors and displays to automatically control wire feeding amount;

[0036] According to the real-time collected information about the tow feed amount and the filter rod circumference, the tow feed amount is automatically calculated and adjusted according to the preset linear relationship to keep it between the preset minimum tow feed amount and the maximum tow feed amount;

[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 as an adjustment strategy for the tow feed amount.

[0038] According to a second aspect of an embodiment of the present invention, a control system for preparing diacetate fiber tow is provided.

[0039] In one or more embodiments, preferably, the preparation control system of the diacetate fiber tow comprises:

[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 cross section of the cellulose diacetate tow;

[0041] A start production module is used to set up a production process of cellulose diacetate tow and start the production of the tow;

[0042] The filter rod rolling module is used to obtain the filter rod with the smallest circumference and the filter rod with the largest circumference by reducing and increasing the amount of the tow filled into the smoke cavity;

[0043] A minimum tow feed amount determination module is used to extract the minimum tow feed amount according to the filter rod with the smallest circumference;

[0044] A maximum tow feed amount determination module is used to extract the maximum tow feed amount according to the filter rod with the largest circumference;

[0045] The online control wire feeding module is used to adjust the wire feeding amount online according to the constraints of the minimum wire feeding amount and the maximum wire feeding amount.

[0046] According to a third aspect of an embodiment of the present invention, there is provided a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the method as described in any one of the first aspect of the embodiment of the present invention is implemented.

[0047] According to a fourth aspect of an embodiment of the present invention, there is provided an electronic device, comprising 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 any one of the methods described in the first aspect of the embodiment of the present invention.

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

[0049] In the scheme of the present invention, a method for evaluating the filling amount of cellulose diacetate tow for a hollow filter rod is provided to achieve precise control of the preparation process.

[0050] In the scheme of the present invention, a compression nozzle is used to blow the opened filament bundle into the smoke chamber of a filter rod forming machine with a selected filter rod circumference, without controlling the circumference, and only by reducing and increasing the amount of filament bundle filled into the smoke chamber, a minimum weight filter rod and a maximum weight filter rod are produced.

[0051] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0052] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the 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 work.

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

[0055] Figure 2 It is a flow chart of setting the cross-sectional shape, linear density and smoke cavity of the monofilament cross section of the diacetate cellulose tow in the preparation control method of the diacetate cellulose tow according to one embodiment of the present invention.

[0056] Figure 3 It is a flowchart of setting the production process of cellulose diacetate tow and starting the production of the tow in the preparation control method of cellulose diacetate tow according to one embodiment of the present invention.

[0057] Figure 4 The present invention is a flowchart of obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity in a preparation control method of a diacetate fiber tow according to an embodiment of the present invention.

[0058] Figure 5 It is a flow chart of extracting the minimum tow feed amount according to the filter rod with the minimum circumference in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

[0059] Figure 6 It is a flow chart of extracting the maximum tow feed amount according to the filter rod with the largest circumference in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

[0060] Figure 7 It is a flow chart of adjusting the tow feed amount online according to the constraints of the minimum tow feed amount and the maximum tow feed amount in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

[0061] Figure 8 It is a structural diagram of a control system for preparing diacetate fiber tow according to an embodiment of the present invention.

[0062] Fig. 9 It is a structural diagram of an electronic device in one embodiment of the present invention. DETAILED DESCRIPTION

[0063] In some of the processes described in the specification and claims of the present invention and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this article or executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., do not represent the order of precedence, and do not limit the "first" and "second" to be different types.

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0065] Fiber preparation is a key process in modern industry and technology, which involves converting natural or synthetic materials into slender, flexible filaments. This process not only provides the basic raw materials for the textile industry, but is also widely used in many fields such as medicine, construction, and aerospace. Fiber preparation makes materials more durable and lightweight, while improving their functionality, such as antibacterial and fireproof properties. In addition, by precisely controlling the structure and composition of fibers, new materials with specific properties can be designed to meet the ever-changing technological and social needs. Therefore, fiber preparation is not only the basis of industrial production, but also an important force to promote scientific and technological progress and innovation.

[0066] Prior to the present invention, for conventional, medium and slim cigarette tows, the processing capacity is usually described by a straight line fitting the relationship between the net filter rod volume and the filter rod pressure drop under the conditions of rated processing speed, rated filter rod circumference and rated filter rod length. This straight line is called a tow characteristic curve. Considering that the hollow filter rod is a hollow structure, the only indicator in the processing process that is affected by the specifications of the cellulose diacetate tow is the filter rod weight, and there is no indicator for the filter rod pressure drop. Therefore, the tow characteristic curve method can no longer meet the evaluation requirements.

[0067] In an embodiment of the present invention, a method and system for controlling the preparation of diacetate fiber tow are provided. The solution realizes accurate weight control of the diacetate fiber tow preparation process by designing an evaluation method for the filling amount of diacetate cellulose tow for hollow filter rods and combining it with the preparation process control.

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

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

[0070] In one or more embodiments, preferably, the preparation control method of the diacetate fiber tow includes:

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

[0072] S102, setting a process for making a cellulose diacetate tow and starting the making of the tow;

[0073] S103, obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity;

[0074] S104, extracting the minimum tow feeding amount according to the filter rod with the smallest circumference;

[0075] S105, extracting the maximum tow feeding amount according to the filter rod with the largest circumference;

[0076] S106, adjusting the tow feed amount online according to the constraints of the minimum tow feed amount and the maximum tow feed amount.

[0077] In the embodiment of the present invention, the evaluation of the existing filter rod is carried out under the selected target circumference conditions (for example, the target circumference is 24mm, and the evaluation requires the control circumference to be ±0.05mm). Under the fixed circumference, the weight of the tow that can be filled in the filter rod has an upper limit. If the upper limit is exceeded, the rod cannot be formed under the target circumference. The present scheme specifically relates to a method for evaluating and controlling diacetate cellulose tow for hollow filter rods. The method for evaluating and controlling diacetate cellulose tow for hollow filter rods specifically includes core steps such as smoke chamber specification selection, tow opening and filter rod rolling, which solves the problem that the controllable weight of diacetate cellulose tow for hollow filter rods cannot be evaluated and controlled during the tow production process.

[0078] Figure 2 It is a flow chart of setting the cross-sectional shape, linear density and smoke cavity of the monofilament cross section of the diacetate cellulose tow in the preparation control method of the diacetate cellulose tow according to one 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 are specifically provided including:

[0080] S201, setting the cross-sectional shape of the monofilament of the cellulose diacetate tow to include X-shape, Y-shape and O-shape;

[0081] S202, setting the linear density of a single fiber in the cellulose diacetate tow to be not less than 6.0 denier;

[0082] S203, the tow linear density of cellulose acetate tow for hollow filter rods is not less than 22,000 deniers, wherein the cross-sectional shapes of the single filaments of the tow include X-shaped, Y-shaped and O-shaped;

[0083] S204, according to the outer circumference of the target hollow filter rod, select a smoke cavity whose processing range covers the circumference of the filter rod.

[0084] In the embodiment of the present invention, preferably, the linear density of a single fiber in the diacetate cellulose tow is 6.0 denier to 10.0 denier, and the linear density of the diacetate cellulose tow is 22000 denier to 75000 denier. The processing technology of the hollow special-shaped filter rod is different from the molded smoke cavity we evaluate daily. It belongs to extrusion molding. Therefore, during the processing, even if the circumference and control accuracy are selected, the upper and lower limits of the weight that can be filled will be widened on the basis of the conventional filling amount.

[0085] Figure 3 It is a flowchart of setting the production process of cellulose diacetate tow and starting the production of the tow in the preparation control method of cellulose diacetate tow according to one embodiment of the present invention.

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

[0087] S301, open the primary air opener to initially open the yarn bundle;

[0088] S302, turning on the secondary air opener to increase the looseness of the tow through airflow to ensure that the fibers are more evenly distributed;

[0089] S303, applying appropriate tension to the tow by adjusting the pressure of the roller pair;

[0090] S304, input roller pair and rear opening roller pair, through stronger airflow, complete the final opening of the tow

[0091] S305, through the plasticizer box and the wire feeding roller pair, ensure that the wire bundle enters the molding process in the best condition.

[0092] In an embodiment of the present invention, the tow opening step is specifically as follows: the diacetate cellulose tow for the hollow filter rod is sequentially passed 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 wire feeding roller pair. The preparation of diacetate cellulose tow and its application in the production of hollow filter rods is a highly specialized process. The following is a detailed explanation of the significance and role of the diacetate cellulose tow through a series of processing steps: a primary air opener, purpose: to preliminarily open the tow to reduce the adhesion between the fibers and prepare for subsequent processing. Function: Through the action of the airflow, the fibers in the tow are preliminarily loosened to improve the softness and processability of the fibers. A secondary air opener, purpose: to further enhance the degree of opening of the tow. Function: On the basis of the primary opening, the looseness of the tow is further enhanced by the airflow to ensure that the fibers are more evenly distributed. A pre-tension roller pair, purpose: to adjust the tension of the tow to make it suitable for subsequent processing. Function: By adjusting the pressure of the roller pair, appropriate tension is applied to the tow to ensure the stability of the tow in the subsequent processing. Input roller pair, purpose: to smoothly guide the tow into the next process. Function: as a transition for the tow to enter the next process, ensure the smooth transportation of the tow to avoid wrinkles or damage. Opening roller pair, purpose: to further refine the opening process of the tow. Function: through the mechanical action of the roller pair, the tow is further loosened to make the fiber distribution more uniform, providing conditions for the final molding. Three-stage air opener, purpose: to achieve the final opening of the tow. Function: on the basis of the first two levels of air opening, the final opening of the tow is completed through the action of stronger airflow to ensure the best state of the fiber. Plasticizer box, purpose: to increase the plasticity of the tow for easy molding. Function: through the action of plasticizer, the plasticity of the tow is improved, making it easier to form the desired shape in the subsequent molding process. Feeding roller pair, purpose: to feed the processed tow into the molding machine. Function: As the last link of the tow entering the forming machine, ensuring that the tow enters the forming process in the best state directly affects the quality of the final product. The setting of these steps is to ensure that the diacetate cellulose tow can achieve the best processing state and product quality during the process of being processed into hollow filter rods.

[0093] Figure 4 The present invention is a flowchart of obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity in a preparation control method of a diacetate fiber tow according to an embodiment of the present invention.

[0094] like Figure 4 As shown, in one or more embodiments, preferably, the method of obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity specifically includes:

[0095] S401, selecting a number of controllable target processing ranges for the same smoke cavity;

[0096] S402, during the processing, as the weight of the tow increases, the circumference of the filter rod will gradually increase until the tow is accumulated at the delivery port and cannot be filled any more, and an upper limit of the tow filling is obtained. At this time, the circumference of the corresponding filter rod corresponds to the filter rod with the largest circumference;

[0097] S403. As the weight of the tow decreases, the circumference of the filter rod will gradually decrease until the tow is broken at the delivery port and cannot be filled any more, thereby obtaining a tow filling lower limit. At this time, the circumference of the corresponding filter rod corresponds to the filter rod with the smallest circumference.

[0098] In the embodiment of the present invention, the same set of smoke chambers can select different controllable target processing ranges, such as 23.80mm-24.20mm. If the above-mentioned circumferential control is abandoned during the processing, as the weight of the tow increases, the circumference of the filter rod will gradually increase, and can break through 24.20mm and increase to 24.30mm-24.50mm, but the circumferential control cannot meet the ±0.05mm requirement until the tow accumulates at the delivery port and cannot be filled again, and an upper limit of the tow filling is obtained. As the weight of the tow decreases, the circumference of the filter rod will gradually decrease, and can break through 23.80mm and drop to 23.50mm-23.70mm, but the circumferential control cannot meet the ±0.05mm requirement until the tow is broken at the delivery port and cannot be filled again, and a lower limit of the tow filling is obtained.

[0099] Figure 5 It is a flow chart of extracting the minimum tow feed amount according to the filter rod with the minimum circumference in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

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

[0101] S501, extracting the net content of the tow in the filter rod corresponding to the filter rod with the smallest circumference;

[0102] S502. The net content of the tow in the filter rod corresponding to the filter rod with the smallest circumference is used to represent the minimum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

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

[0104] Figure 6 It is a flow chart of extracting the maximum tow feed amount according to the filter rod with the largest circumference in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

[0105] like Figure 6 As shown, in one or more embodiments, preferably, the maximum tow feed amount extraction according to the filter rod with the largest circumference specifically includes:

[0106] S601, extracting the net content of the tow in the filter rod corresponding to the filter rod with the largest circumference;

[0107] S602. The net content of the tow in the filter rod corresponding to the filter rod with the largest circumference is used to represent the maximum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

[0108] In an embodiment of the present invention, when manufacturing a filter rod, the circumference of the filter rod can be adjusted by precisely controlling the feed amount of diacetate fiber tow. Increasing the tow feed amount generally increases the circumference of the filter rod, while reducing it will reduce the circumference. Using advanced measuring equipment, the size of the filter rod can be monitored in real time during the production process to ensure that each filter rod meets the preset specifications. These technologies enable producers to accurately know the exact amount of tow required to achieve a specific circumference. Filter rods with maximum circumference generally provide better filtration efficiency and different smoking resistance, which is crucial to meeting the needs of different consumers. Although 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. In addition, the process of extracting the net content of tow in the maximum circumference filter rod is: by collecting data on the maximum circumference filter rod in production, including information such as tow feed amount, environmental conditions, and tow characteristics, statistical analysis methods can be used to determine the net content of tow required to produce the maximum circumference. Conduct tests in actual production and adjust the tow feed amount to observe its effect on the filter rod circumference, so as to find the optimal tow feed amount to achieve the maximum circumference. Converting the net tow content in the maximum circumference filter rod into a production standard as the maximum tow feed amount to be used in different production batches helps to maintain consistency in product performance. Adjust the maximum tow feed amount according to actual production conditions (such as raw material changes, ambient humidity and temperature, etc.) to ensure that the quality of the filter rod is not affected. In short, through the above steps, manufacturers can not only ensure the production of maximum circumference filter rods that meet quality standards, but also effectively control production costs and improve production efficiency.

[0109] Figure 7 It is a flow chart of adjusting the tow feed amount online according to the constraints of the minimum tow feed amount and the maximum tow feed amount in the preparation control method of diacetate fiber tow according to one embodiment of the present invention.

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

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

[0112] S702, automatically calculating and adjusting the tow feed amount according to a preset linear relationship based on the real-time collected information about the tow feed amount and the filter rod circumference, so as to keep it between a preset minimum tow feed amount and a preset maximum tow feed amount;

[0113] S703, by conducting quality inspection on the produced filter rods and feeding the results back to the control system, the preset linear relationship is continuously optimized as an adjustment strategy for the tow feed amount.

[0114] In an embodiment of the present invention, an automated control system is established, and its system composition includes: an industrial computer, a PLC (programmable logic controller), an industrial camera, a servo motor and a display. These components work together to achieve real-time monitoring and adjustment of the tow feed amount on the production line. Furthermore, through the sensors and industrial cameras installed on the production line, the system can collect data about the tow feed amount, the filter rod circumference and other related parameters in real time. Based on the collected data, the system automatically calculates and adjusts the tow feed amount to keep it between the preset minimum and maximum values. Based on fuzzy logic or neural network technology, special software is developed to process the collected data and automatically adjust the tow feed amount according to a preset algorithm. An industrial camera is used to collect multi-target images on the production line, including images of the tow feed point and the filter rod forming part. According to the change of the real-time conveying speed of the production line, the system automatically adjusts the camera frame number and exposure time parameters to ensure accurate measurement of the tow feed amount. By continuously adjusting the tow feed amount, the production process is optimized and the quality and production efficiency of the filter rod are improved. By performing quality inspection on the produced filter rods and feeding the results back to the control system, the adjustment strategy of the tow feed amount is further optimized. Based on feedback information, 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 an embodiment of the present invention, a control system for preparing diacetate fiber tow is provided.

[0116] Figure 8 It is a structural diagram of a control system for preparing diacetate fiber tow according to an embodiment of the present invention.

[0117] In one or more embodiments, preferably, the preparation control system of the diacetate fiber tow comprises:

[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 the cellulose diacetate tow and start the production of the tow;

[0120] The filter rod rolling module 803 is used to obtain a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing or increasing the amount of the tow filled into the smoke cavity;

[0121] A minimum tow feed amount determination module 804 is used to extract the minimum tow feed amount according to the filter rod with the smallest circumference;

[0122] A maximum tow feed amount determination module 805 is used to extract the maximum tow feed amount according to the filter rod with the largest circumference;

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

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

[0125] According to a third aspect of an embodiment of the present invention, there is provided a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the method as described in any one of the first aspect of the embodiment of the present invention is implemented.

[0126] According to a fourth aspect of an embodiment of the present invention, an electronic device is provided. Fig. 9 It is a structural diagram of an electronic device in one embodiment of the present invention. Fig. 9 The electronic device shown is a general preparation control device for diacetate fiber tow, which includes a general computer hardware structure, which at least includes a processor 901 and a memory 902. The processor 901 and the memory 902 are connected via a bus 903. The memory 902 is suitable for storing instructions or programs executable by the processor 901. The processor 901 can be an independent microprocessor or a collection of one or more microprocessors. Thus, the processor 901 executes the instructions stored in the memory 902, thereby executing the method flow of the embodiment of the present invention as described above to realize the processing of data and the control of other devices. The bus 903 connects the above-mentioned multiple components together, and at the same time connects the above-mentioned components to the display controller 904 and the display device and the input / output (I / O) device 905. The input / output (I / O) device 905 can be a mouse, a keyboard, a modem, a network interface, a touch input device, a somatosensory input device, a 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 solution provided by the embodiments of the present invention may have the following beneficial effects:

[0128] In the scheme of the present invention, a method for evaluating the filling amount of cellulose diacetate tow for a hollow filter rod is provided to achieve precise control of the preparation process.

[0129] In the scheme of the present invention, a compression nozzle is used to blow the opened filament bundle into the smoke chamber of a filter rod forming machine with a selected filter rod circumference, without controlling the circumference, and only by reducing and increasing the amount of filament bundle filled into the smoke chamber, a minimum weight filter rod and a maximum weight filter rod are produced.

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

[0131] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0132] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0133] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0134] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for controlling the preparation of diacetate fiber tow, characterized in that: The method includes: Setting the cross-sectional shape, linear density and smoke cavity of the monofilament cross-section of the cellulose diacetate tow; Setting up the cellulose diacetate tow production process and starting tow production; By reducing and increasing the amount of tow filled into the smoke cavity, a filter rod with the smallest circumference and a filter rod with the largest circumference are obtained; Extraction of minimum tow feed quantity based on the filter rod with the smallest circumference; Extraction of maximum tow feed quantity based on the filter rod with the largest circumference; The tow feed amount is adjusted online according to the constraints of the minimum tow feed amount and the maximum tow feed amount.

2. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The cross-sectional shape, linear density and smoke cavity of the monofilament cross-sectional area of ​​the cellulose diacetate tow are specifically set as follows: The cross-sectional shape of the monofilament of the cellulose diacetate tow includes an X-shape, a Y-shape and an O-shape; The linear density of a single fiber in the cellulose diacetate tow is set to be not less than 6.0 denier; The linear density of the cellulose acetate tow for hollow filter rods shall not be less than 22,000 deniers, wherein the cross-sectional shapes of the single filaments of the tow include X-shaped, Y-shaped and O-shaped; According to the outer circumference of the target hollow filter rod, a smoke cavity whose processing range covers the circumference of the filter rod is selected.

3. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The process of setting up the production process of the cellulose diacetate tow and starting the production of the tow specifically includes: Open the primary air opener to initially open the tow; Turn on the secondary air opener to loosen the tow through airflow, ensuring a more even distribution of fibers. By adjusting the pressure of the roller pair, appropriate tension is applied to the tow; The opening roller pair after the input roller pair completes the final opening of the tow through the stronger airflow The plasticizer box and the wire feeding roller pair ensure that the wire bundle enters the molding process in the best condition.

4. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The method of obtaining a filter rod with a minimum circumference and a filter rod with a maximum circumference by reducing and increasing the amount of the tow filled into the smoke cavity specifically includes: Select several controllable target processing ranges for the same smoke chamber; During the processing, as the weight of the tow increases, the circumference of the filter rod will gradually increase until the tow accumulates at the delivery port and cannot be filled any further, resulting in an upper limit of tow filling. At this time, the circumference of the filter rod corresponds to the filter rod with the largest circumference; As the weight of the tow decreases, the circumference of the filter rod will gradually decrease until the tow is broken at the delivery port and can no longer be filled, obtaining a tow filling lower limit. At this time, the circumference of the corresponding filter rod corresponds to the filter rod with the smallest circumference.

5. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The extraction of the minimum tow feed amount according to the filter rod with the minimum circumference specifically includes: Extract the net content of the tow in the filter rod corresponding to the filter rod with the smallest circumference; The net content of the tow in the filter rod corresponding to the filter rod with the smallest circumference is used to represent the minimum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

6. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The extraction of the maximum tow feeding amount according to the filter rod with the largest circumference specifically includes: Extract the net content of the tow in the filter rod corresponding to the filter rod with the largest circumference; The net content of the tow in the filter rod corresponding to the filter rod with the largest circumference is used to indicate the maximum tow feed amount of the diacetate fiber tow for the hollow filter rod under the selected smoke chamber conditions.

7. The method for controlling the preparation of diacetate fiber tow according to claim 1, characterized in that: The online adjustment of the tow feed amount according to the constraints of the minimum tow feed amount and the maximum tow feed amount specifically includes: Set up industrial computers, PLCs, industrial cameras, servo motors and displays to automatically control wire feeding amount; According to the real-time collected information about the tow feed amount and the filter rod circumference, the tow feed amount is automatically calculated and adjusted according to the preset linear relationship to keep it between the preset minimum tow feed amount and the maximum tow feed amount; 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 as an adjustment strategy for the tow feed amount.

8. A control system for preparing diacetate fiber tow, characterized in that: The system is used to implement the method according to any one of claims 1 to 7, and the system comprises: The smoke chamber specification selection and design module is used to set the cross-sectional shape, linear density and smoke chamber of the monofilament cross section of the cellulose diacetate tow; A start production module is used to set up a production process of cellulose diacetate tow and start the production of the tow; The filter rod rolling module is used to obtain the filter rod with the smallest circumference and the filter rod with the largest circumference by reducing and increasing the amount of the tow filled into the smoke cavity; A minimum tow feed amount determination module is used to extract the minimum tow feed amount according to the filter rod with the smallest circumference; A maximum tow feed amount determination module is used to extract the maximum tow feed amount according to the filter rod with the largest circumference; The online control wire feeding module is used to adjust the wire feeding amount online according to the constraints of the minimum wire feeding amount and the maximum wire feeding amount.

9. A computer-readable storage medium storing computer program instructions, characterized in that: The computer program instructions implement the method according to any one of claims 1 to 7 when executed by a processor.

10. 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 according to any one of claims 1-7.

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