An open weft insertion device for producing a multi-layer spread fabric

Abstract

The application discloses an opening weft insertion device for producing a multi-layer spread fabric, and belongs to the technical field of textile machinery. The opening weft insertion device comprises an opening device, a weft insertion device and a central control device in communication connection with the opening device and the weft insertion device respectively, the opening device comprises a multi-layer warp yarn control mechanism and a spread control mechanism arranged on both sides of the warp yarn and used for controlling the opening and closing of the warp yarn, and the weft insertion device comprises an automatic weft insertion mechanism and a weft yarn tension control mechanism and is used for controlling the introduction path, sequence and tension of the weft yarn. The opening weft insertion device for producing the multi-layer spread fabric solves the technical problems of insufficient weaving precision and poor adaptability, so that the device can automatically adapt to fabrics with different materials and thicknesses in the production process of the multi-layer fabric, the production efficiency is improved, and human intervention is reduced.

Description

Technical Field

[0001] This invention specifically relates to an open weft insertion device for producing multi-layer spread fabrics, belonging to the field of textile machinery technology. Background Technology

[0002] Multilayer spreadable fabrics are composed of multiple fiber layers, characterized by distinct layers. These layers can be relatively independent or interconnected through specific weaving techniques to form more complex fabric structures. Multilayer spreadable fabrics are a widely used type of fabric in the textile industry, and due to their unique structural and performance advantages, they have been widely applied in various industries and fields. In the industrial field, multilayer spreadable fabrics are used in conveyor belts, industrial filter belts, etc., while composite materials prepared using multilayer spreadable fabrics as preforms have wide applications in the aerospace field, such as rocket nozzles and aircraft brake discs.

[0003] In the production of multi-layer spread fabrics, the warp and weft arrangements become more complex, posing significant challenges to weaving efficiency and product quality. Most existing multi-layer fabric weaving equipment relies on traditional mechanical shedding mechanisms, which have limited adjustment precision and cannot accurately control different fabric thicknesses or number of layers. This leads to misalignment, overlap, and unstable quality during multi-layer weaving.

[0004] When existing equipment operates at high speed for extended periods, the shedding mechanism and weft insertion device wear out quickly, leading to decreased production efficiency and increased equipment maintenance costs. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an shedding and weft insertion device for producing multi-layer spreadable fabrics. Through the coordinated operation of the shedding mechanism, weft insertion mechanism, and central control unit, it can efficiently and accurately assist the spreadable weaving process of multi-layer fabrics, thereby improving fabric quality and production efficiency. It also enhances the equipment's adaptability to different materials and thicknesses during production, improves overall production efficiency, and reduces the impact of human intervention and operational errors.

[0006] The technical solution is as follows:

[0007] An open weft insertion device for producing multi-layer spread fabrics, comprising:

[0008] The shedding device is used to control the opening and closing of the warp yarns, and includes a multi-layer warp yarn control mechanism and a widening control mechanism disposed on both sides of the warp yarns.

[0009] A weft insertion device is used to control the path, sequence, and tension of the weft yarn, and includes an automatic weft insertion mechanism and a weft yarn tension control mechanism.

[0010] The central control device is used to monitor the tension of the fabric, the opening angle and the weft insertion speed in real time; the central control device is in communication connection with the opening device and the weft insertion device respectively. The sensor and the monitoring unit of the central control device monitor the state of the fabric, and automatically adjust the tension of the warp and weft, the opening angle and the weft insertion sequence according to the characteristics of different types, thicknesses and widths of the fabric.

[0011] Further, the multi-layer warp control mechanism can independently adjust the tension and arrangement of different layers of warp, ensuring that the opening of the fabric is uniform and stable. The multi-layer warp control mechanism is provided with a plurality of independent tension adjusters, each first tension adjuster controls the tension of a layer of warp, the first tension adjuster is connected with the driving end of the stepping motor, and the multi-layer warp control mechanism is also provided with a first tension feedback sensor, and the feedback warp tension information is transmitted to the central control device.

[0012] Further, the multi-layer warp control mechanism is also provided with an optical sensor.

[0013] Further, the width expansion control mechanism is provided with a plurality of guide rails and tension adjusting rods.

[0014] Further, the width expansion control mechanism is in communication connection with the central control device.

[0015] Further, the automatic weft insertion mechanism is connected with the multi-axis stepping motor, the weft insertion trajectory is controlled through the multi-axis stepping motor, and the weft insertion sequence is automatically adjusted according to the opening position of each layer of warp.

[0016] Further, the weft tension control mechanism is provided with a plurality of independent tension sensors and adjusters, which can adjust the tension of the weft in real time according to the movement of the weft in the fabric.

[0017] Further, the central control device includes a sensor and a monitoring unit, a data processing unit and an automatic feedback adjustment unit; the sensor and the monitoring unit are used to monitor the tension of the fabric, the opening angle, the weft path and the speed parameter; the data processing unit is used to receive the information of the sensor feedback from the sensor and monitoring unit, and analyze the width, tension and density information of the fabric in real time through an algorithm; the automatic feedback adjustment unit is used to adjust the working state of the opening mechanism and the weft insertion mechanism based on the analysis results of the data processing unit.

[0018] Further, it is also provided with an alarm, when an abnormal situation is detected, the system will remind the operator through the alarm device, or automatically stop the equipment running according to the preset safety mechanism.

[0019] Further, it also includes an environment monitoring mechanism for monitoring temperature and humidity, to ensure that the fabric is woven under suitable environmental conditions, and to reduce the influence of environmental changes on the tension of the fabric and the weaving precision.

[0020] The present application has at least the following advantages:

[0021] 1. The multi-layer warp yarn control mechanism and the width control mechanism of the shedding device effectively solve the technical problems of uneven shedding of multi-layer fabric and difficulty in introducing weft yarn, improving the weaving precision and stability of the fabric.

[0022] 2. The automatic adjustment and intelligent feedback mechanism of the central control device, shedding device and weft insertion device solve the technical problems of insufficient weaving precision and poor adaptability, enabling the device to automatically adapt to fabrics of different materials and thicknesses during the production process of multi-layer fabric, improving production efficiency and reducing human intervention. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is a schematic diagram of the overall structure of the shedding and weft insertion device for producing multi-layer width fabric according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the structure of the central control device in Figure 1 ;

[0026] Explanation of reference signs:

[0027] 1. Shedding device; 11. Multi-layer warp yarn control mechanism; 12. Width control mechanism; 13. First tension adjuster; 14. First tension sensor; 15. Stepping motor; 16. Optical sensor; 17. Guide rail; 19. Tension adjusting rod; 18. Second tension sensor;

[0028] 2. Central control device; 21. Sensor and monitoring unit; 22. Data processing unit; 23. Feedback adjustment unit;

[0029] 3. Weft insertion device; 31. Automatic weft insertion mechanism; 32. Weft yarn tension control mechanism; 33. Automatic weft insertion trajectory adjustment module; 34. Third sensor; 35. Fourth sensor; 36. Second tension adjuster;

[0030] 4. Environmental monitoring module; 5. Alarm; DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in conjunction with the drawings.

[0032] Example 1

[0033] See Figure 1 This embodiment provides an opening weft insertion device for producing multi-layer spread fabrics, including an opening device 1 and a weft insertion device 2, which are respectively connected to a central control device 3. It can efficiently and accurately assist the spread weaving process of multi-layer fabrics, thereby improving the quality of the fabric and production efficiency.

[0034] In this embodiment, the shedding device 1 is used to control the opening and closing of the warp yarns to ensure the weaving accuracy of multi-layer fabrics. The shedding device 1 includes a multi-layer warp yarn control mechanism 11 and a widening control mechanism 12 installed on both sides of the warp yarns. Through the multi-layer warp yarn control mechanism and the widening control mechanism of the shedding device, the technical problems of uneven shedding and difficulty in weft yarn introduction in multi-layer fabrics are effectively solved, thereby improving the weaving accuracy and stability of the fabric.

[0035] The multi-layer warp control mechanism 11 is equipped with multiple independent tension regulators, each of which (see Appendix) Figure 1 The first tension regulator 13 controls the tension of one layer of warp yarns. Each tension regulator 13 is connected to the drive end of a stepper motor. When an abnormal tension or insufficient opening is detected in a certain layer, the tension of the corresponding layer is automatically adjusted by the stepper motor 15 to ensure stability during the weaving process. The first tension sensor 14 is installed on the multi-layer warp yarn control mechanism 11. The feedback warp yarn tension information is transmitted to the central control device 2. The central control device 2 adjusts the tension of the warp yarns in real time based on the feedback information to ensure that the opening height of the warp yarns in different layers remains consistent. The multi-layer warp yarn control mechanism is also equipped with an optical sensor 16, which can detect the arrangement status of each layer of warp yarns to ensure clear and disordered opening.

[0036] The widening control mechanism 12 is equipped with multiple guide rails 17 and tension adjusting rods 19 to achieve the widening effect. The widening control mechanism 12 automatically adjusts the warp tension according to the fabric width, ensuring that the fabric does not curl or overstretch during widening. The widening control mechanism 12 is communicatively connected to the central control unit 2. Sensors installed on the sheathing device 1 detect the warp tension and feed it back to the central control unit for real-time adjustment of the widening angle and tension.

[0037] Operation of the shedding device 1: At the start of weaving, initial tension parameters are set according to the fabric's thickness, number of layers, and material. The warp yarns enter the shedding area through the first regulator 13. Sensors on the shedding device 1 monitor the tension of each layer in real time to ensure uniform shedding of all warp yarns. When abnormal tension or insufficient shedding of a certain layer is detected, the tension of the corresponding layer is automatically adjusted by the stepper motor 15 to ensure stability during the weaving process.

[0038] In this embodiment, the weft insertion device 3 is used to achieve precise multi-layer fabric weft insertion by controlling the weft insertion path, sequence and tension. The weft insertion device 3 includes an automatic weft insertion mechanism 31 and a weft tension control mechanism 32.

[0039] The automatic weft insertion mechanism 31 uses a multi-axis stepper motor to control the motion trajectory of the weft, and automatically adjusts the weft insertion sequence according to the opening position of each layer of warp. Based on the state of the warp opening, the automatic weft insertion mechanism 31 detects the weft insertion trajectory through the sensor installed on the weft insertion device 3, ensuring that the weft can accurately enter different fabric layers.

[0040] The weft tension control mechanism 32 uses multiple independent second tension sensors 18 and regulators to adjust the weft tension in real time according to the weft motion in the fabric. The weft tension control mechanism 32 can adjust the weft tension in different fabric layers, so that the weft is tightly combined with the warp, avoiding the weft being too tight or loose, which affects the structural stability of the fabric. The second tension sensor 18 is installed on the weft insertion device 3, and the second tension sensor 18 is used to sense the subtle changes in weft tension, ensuring that the weft tension remains consistent when passing through different layers of fabric.

[0041] Operation process of the weft insertion device: After the device is started, the weft insertion path and tension parameters are set according to the width, number of layers and thickness of the fabric. According to the opening condition of the multi-layer warp, the automatic weft insertion mechanism 31 adjusts the weft insertion sequence and path to ensure that the weft passes through each opening smoothly without disturbing other wefts; the weft tension control mechanism 32 monitors the weft tension changes in real time, and if the tension is uneven or the weft is blocked, the weft insertion device automatically adjusts the tension and recalculates the weft path to ensure smooth weft insertion.

[0042] The central control device 2 includes a sensor and monitoring unit 21, a data processing unit 22 and a feedback adjustment unit 23, which comprehensively controls the operation of the opening device 1 and the weft insertion device 3.

[0043] The sensor and monitoring unit 21 monitors the tension, opening angle, weft path, speed and other parameters of the fabric, and multiple sensors installed on the opening device 1 and the weft insertion mechanism 3 transmit data to the central control device 2 in real time. The sensor and monitoring unit 21 is provided with a sensor detection assembly for monitoring the equipment operating state and fabric tension changes. When an abnormality occurs, such as excessive tension or incomplete opening, the device automatically stops running and sends an alarm signal.

[0044] The data processing unit 22 is used to analyze the current weaving state in real-time based on the information fed back by the sensor and monitoring unit 21. The data processing unit 22 has a built-in processing unit and a built-in algorithm. The optimal tension, opening angle, weft insertion sequence, etc. are calculated by the built-in algorithm, and automatic adjustment instructions are sent to the opening device 1 and the weft insertion machine device 3. This algorithm is a kind of existing textile parameter optimization algorithm based on numerical analysis and heuristic search. First, according to the technical specifications and historical experience of the textile machinery, the initial range of parameters such as tension, opening angle and weft insertion sequence is set. The second step is to perform numerical analysis on each parameter to determine its influence trend on performance indicators such as fabric quality and production efficiency. The third step is to use a heuristic search algorithm to find the optimal solution within the parameter range. The fourth step is to evaluate the performance of each parameter combination obtained by iteration, including fabric quality, production efficiency, energy consumption, etc. Finally, when the heuristic search algorithm meets the stopping conditions (such as iteration times, performance improvement amplitude, etc.), the optimal parameter combination is output. For a detailed introduction of this algorithm, please refer to "Wang Cong, & Mathematics. Analysis of expected approximation error of random heuristic search algorithm. (Doctoral dissertation)".

[0045] When the data processing unit 22 detects abnormal conditions such as excessive tension or weft insertion failure, the system will remind the operator through the alarm device or automatically stop the equipment operation according to the preset safety mechanism. The alarm 5 is provided on the device, and when an abnormal condition is detected, the system will remind the operator through the alarm or automatically stop the equipment operation according to the preset safety mechanism.

[0046] The feedback adjustment unit 23 is used to adjust the working state of the opening device 2 and the weft insertion device 3 according to the real-time monitoring data. When the warp tension is abnormal, the warp tension is adjusted by adjusting the spread control mechanism 12; when the weft insertion is blocked, the weft insertion path is recalculated. The calculation process is as follows: first, when the weft insertion is not successful or the weft insertion speed is abnormal, it is judged that the weft insertion is blocked based on the monitoring data. Then collect the parameters such as weft tension, opening angle, weft insertion speed when blocked. Based on the collected information, analyze the possible reasons for the blockage, such as excessive weft tension, inappropriate opening angle, incorrect weft insertion sequence, etc. According to the reasons for the blockage, adjust the weft tension to keep it within a suitable range. Optimize the opening angle to ensure that the weft can pass through the gap between the warps smoothly. If the blockage is caused by incorrect weft insertion sequence, the weft insertion sequence is re-planned. Based on the adjusted parameters, the weft insertion path is recalculated, which may need to consider factors such as the elasticity of the weft, the arrangement of the warps, the movement rules of the loom, etc. Finally, according to the recalculated weft insertion path, adjust the related settings of the textile machinery. After ensuring that all parameters and settings are correct, restart the weft insertion process.

[0047] The feedback adjustment unit 23 can also automatically optimize the weaving parameters according to the fabric characteristics of different materials, layers and widths, to ensure the stability and reliability of the fabric production process.

[0048] In actual production, the opening weft insertion device for producing multi-layer expanded fabric of the present application can be applied to the production of various fabrics of different materials and types, and is especially suitable for the following fields:

[0049] Weaving of heavy fabric: The device can effectively solve the problems of uneven tension and difficult weft insertion during the weaving process of multi-layer heavy fabric, and improve the weaving quality of heavy fabric.

[0050] Weaving of wide fabric: Through the expansion control mechanism 12 and the central control device 2, the present application can ensure the uniform tension of wide fabric, avoid edge curling and weft misplacement, and is suitable for the production of wide industrial fabric.

[0051] Weaving of composite material: The device can also be applied to the production of multi-layer composite fabric, especially special textiles that require high precision control.

[0052] In summary, the opening weft insertion device for producing multi-layer expanded fabric of the present application can be applied to the efficient weaving of multi-layer fabric, especially in the fields of industrial textiles, composite materials, heavy fabric, wide fabric, etc. The device can significantly improve the production efficiency and quality of fabric, and meet the production needs of high-precision, multi-layer fabric in modern textile industry.

[0053] Example two

[0054] This embodiment provides an opening weft insertion device for producing multi-layer expanded fabric, which is different from example one in that it is also provided with an environmental monitoring module 4 for monitoring temperature and humidity, to ensure that the fabric is woven under suitable environmental conditions, and to reduce the influence of environmental changes on fabric tension and weaving precision.

[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An open weft insertion device for producing multi-layer spread fabrics, characterized in that, include: The shedding device is used to control the opening and closing of the warp yarns, and includes a multi-layer warp yarn control mechanism and a widening control mechanism disposed on both sides of the warp yarns. The multi-layer warp control mechanism is equipped with multiple independent tension regulators. Each first tension regulator controls the tension of one layer of warp yarns. The first tension regulator is connected to the drive end of the stepper motor. The multi-layer warp control mechanism is also equipped with a first tension sensor, and the feedback warp tension information is transmitted to the central control device. The stretching control mechanism is used to automatically adjust the tension of the warp yarns according to the fabric width to ensure that the fabric does not curl or stretch excessively when stretching. The stretching control mechanism is communicatively connected to the central control device. The weft insertion device, used to control the introduction path, sequence, and tension of the weft yarn, includes an automatic weft insertion mechanism and a weft yarn tension control mechanism. The automatic weft insertion mechanism is connected to a multi-axis stepper motor, which controls the movement trajectory of the weft yarn and automatically adjusts the introduction sequence of the weft yarn according to the opening position of each layer of warp yarns. The weft yarn tension control mechanism is equipped with multiple independent tension sensors and regulators, which adjust the tension of the weft yarn in real time according to the movement of the weft yarn in the fabric. The weft yarn tension control mechanism monitors the tension changes of the weft yarn in real time. If uneven tension or weft yarn obstruction occurs, the weft insertion device automatically adjusts the tension and recalculates the weft yarn path to ensure a smooth weft insertion process. A central control unit is used to monitor the fabric tension, shedding angle, and weft yarn introduction speed in real time. The central control device is communicatively connected to the opening device and the weft insertion device, respectively; The central control device includes a sensor and monitoring unit, a data processing unit, and an automatic feedback adjustment unit. The sensor and monitoring unit is used to monitor the fabric tension, shedding angle, weft path, and speed parameters. The data processing unit is used to analyze the current weaving status in real time based on the information fed back by the sensor and monitoring unit. The data processing unit has a built-in algorithm that calculates the optimal tension, shedding angle, and weft insertion sequence, and automatically sends adjustment commands to the shedding device and the weft insertion device. This algorithm is a textile parameter optimization algorithm based on numerical analysis and heuristic search. An automatic feedback adjustment unit is used to adjust the working status of the shedding mechanism and the weft insertion mechanism in real time based on the analysis results of the data processing unit. When the warp tension is abnormal, the warp tension is adjusted by adjusting the widening control mechanism. When the weft introduction is obstructed, the weft introduction path is recalculated. If the weft fails to be introduced correctly or the introduction speed is abnormal, it is determined that the weft introduction is obstructed.

2. The sheathed weft insertion device according to claim 1, characterized in that, The multi-layer warp control mechanism is also equipped with an optical sensor.

3. The sheathed weft insertion device according to claim 1, characterized in that, The widening control mechanism is equipped with multiple guide rails and tension adjustment rods.

4. The sheathed weft insertion device according to claim 1, characterized in that, It is also equipped with an alarm.

5. The sheathed weft insertion device according to claim 1, characterized in that, It also has an environmental monitoring module.

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