Post-treatment process of strong glass fiber cloth

Abstract

The invention relates to the technical field of strong glass fiber cloth manufacturing, in particular to a strong glass fiber cloth post-treatment process which comprises the following steps: S1, performing surface pretreatment on strong glass fiber cloth, and performing tension pre-distribution control through a mechanical flattening device to flatten the strong glass fiber cloth; s2, the strong glass fiber cloth is flattened and then continuously introduced into a multi-section temperature control drying module, through multi-section temperature control and tension feedback control, cloth cover deformation and internal stress accumulation in the drying process are remarkably reduced, the drying efficiency and the size stability are improved conveniently, partition drying and low-temperature slurry coating are adopted, and the drying efficiency is improved. According to the method, the heat energy consumption is reduced, secondary high-temperature curing equipment is omitted, the purposes of saving energy and reducing cost are conveniently achieved, directional coating is combined with a composite slurry formula, the strength and surface performance of a finished product are improved, meanwhile, the uniformity and adhesive force of a coating are improved, and through high integration of drying and coating links, the production efficiency of the whole line is improved, and the continuous treatment capacity of the method is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of strong glass fiber cloth manufacturing, in particular to a post-treatment process of strong glass fiber cloth. BACKGROUND

[0002] The strong glass fiber cloth is the result of the cross promotion of material science, composite material engineering and application demand, and the core is to solve the problem of insufficient strength of traditional glass fiber through composition design, process optimization and interface technology breakthrough, and to form a technical replacement advantage in the fields of aerospace, new energy and the like.

[0003] The patent with the patent publication number CN105133233A has the following description in the specification: "The present application relates to a post-treatment process of glass fiber cloth roll, comprising the following steps: (1) preparation before operation; (2) preparation of acid leaching solution; (3) acid leaching of glass fiber cloth; (4) hot washing; (5) drying, sintering treatment; (6) product inspection. The advantages of the present application are: the present process uses acid-resistant and high-temperature-resistant ceramic pipes, so that the glass fiber cloth does not need to be unfolded, and the whole roll of cloth can be directly post-treated, thus shortening the treatment time and being easy to operate; the present process improves the acid leaching and drying, sintering treatment conditions, and the treated product has smooth appearance, uniform color and smooth surface", the above-mentioned technology realizes the direct treatment of the whole roll of cloth by using ceramic pipes, saves the unfolding and rolling steps, shortens the treatment time, and is more convenient to operate, but the post-treatment process of the existing strong glass fiber cloth usually adopts hot air drying under fixed tension and two-step impregnation treatment method, which is easy to cause wrinkles on the cloth surface, poor uniformity of the coating, high energy consumption, low efficiency, large material waste and unstable product quality.

[0004] In summary, it is still a key problem in the strong glass fiber cloth manufacturing technical field to develop a post-treatment process of strong glass fiber cloth. SUMMARY

[0005] The present application aims to solve the problems in the prior art that the post-treatment process of the existing strong glass fiber cloth usually adopts hot air drying under fixed tension and two-step impregnation treatment method, which is easy to cause wrinkles on the cloth surface, poor uniformity of the coating, high energy consumption, low efficiency, large material waste and unstable product quality.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The present application provides a post-treatment process of strong glass fiber cloth, comprising the following steps: S1, surface pretreatment is performed on the strong glass fiber cloth, and tension pre-distribution control is performed through a mechanical flattening device to flatten the strong glass fiber cloth; S2, continuously introduce the strong glass fiber cloth after being flattened into a multi-section temperature control drying module, and adopt a tension closed loop control system for constant tension conveying during the drying process; S3, after the drying is completed, the strong glass fiber cloth is conveyed into a directional coating process through constant tension to obtain a coated strong glass fiber cloth; S4, after the coated strong glass fiber cloth is preliminarily cured at low temperature, it is sent into a segmented air cooling curing area for temperature reduction and shaping; S5, the shaped strong glass fiber cloth is subjected to appearance inspection by using an intelligent quality inspection system, and is wound by using an intelligent tension winding system during the inspection process.

[0007] Further, in step S1, the strong glass fiber cloth is subjected to surface pretreatment, and tension pre-distribution control is performed by using a mechanical flattening device, so that the method for flattening the strong glass fiber cloth is: The original roll of strong glass fiber cloth is sent into a pretreatment line through an automatic feeding device, and the initial strong glass fiber cloth is controlled in a tension range of 2.0±0.2 N / cm by using a mechanical flattening device. The pretreatment is to clean the surface of the strong glass fiber cloth, remove dust, impurities and oil stains attached to the surface of the strong glass fiber cloth, and adopt a physical dust removal-chemical cleaning-hot air preliminary drying three-in-one combined technology, including physical dust removal by a high-efficiency filtration dust collection device, chemical cleaning by a neutral surfactant, and preliminary drying by a hot air circulation drying system after washing by pure water, and the drying temperature is controlled in a range of 60-80℃. Subsequently, the pretreated strong glass fiber cloth is subjected to tension pre-distribution control by using a mechanical flattening device, so that the strong glass fiber cloth is in a pre-tensioned state in the transverse and longitudinal directions.

[0008] Further, in step S2, the method for continuously introducing the strong glass fiber cloth after being flattened into a multi-section temperature control drying module, and adopting a tension closed loop control system for constant tension conveying during the drying process is: The strong glass fiber cloth is continuously introduced into a multi-section temperature control drying module after being flattened, and sequentially passes through temperature gradient drying sections set to 150-160℃, 120-130℃ and 70-80℃, to build a drying path of the thermal-mechanical coupling response characteristics of the strong glass fiber cloth. The drying path is divided into three sections. The first section has a temperature range of 150-160℃, a length of 4.0 m, a wind speed of 3.0 m / s, and a drying time of 30-45 s. The second section has a temperature range of 120-130℃, a length of 3.5 m, a wind speed of 2.5 m / s, and a drying time of 25-35 s. The third section has a temperature range of 7-80℃, a length of 3.0 m, a wind speed of 2.0 m / s, and a drying time of 20-30 s. The strong glass fiber cloth has a belt line speed of 5.0-6.5 m / min.

[0009] Further, in step S2, the strong glass fiber cloth is continuously introduced into the multi-section temperature control drying module after being flattened, and the method for constant tension conveying during the drying process is as follows: In the drying path, a heat-tension control system is applied to the mechanical flattening device. A real-time tension-speed feedback loop is constructed by a high-sensitivity tension sensor and a variable frequency driving traction roller, and dynamic adjustment is performed by a PLC control unit, so as to realize constant tension conveying of the strong glass fiber cloth between each temperature section. The heat-tension control system compensates for the thermal shrinkage and length change of the strong glass fiber cloth caused by water evaporation in real time.

[0010] Further, in step S3, the method for obtaining the coated strong glass fiber cloth by conveying the strong glass fiber cloth after drying into the directional coating process is as follows: The strong glass fiber cloth after drying is conveyed into the directional coating process by constant tension. The directional coating process adopts a low-temperature curing multi-component compound slurry. The components of the compound slurry include a high molecular film-forming base material, inorganic reinforcing particles, a flexibility modifier, a wet dispersing aid, and a low-temperature catalyst. The high molecular film-forming base material includes but is not limited to PU modified acrylate, and the content range is 45% to 60%. The inorganic reinforcing particles include but are not limited to nano 、 , and the content range is 15% to 25%. The flexibility modifier is a siloxane elastomer, and the content range is 5% to 15%. The wet dispersing aid is a non-ionic block copolymer, and the content range is 1% to 5%. The low-temperature catalyst content range is ≤3%. The compound slurry has rheological properties and low-temperature reaction characteristics, and completes preliminary curing under the condition of not more than 100°C.

[0011] Further, in step S3, the method for obtaining the coated strong glass fiber cloth by conveying the strong glass fiber cloth after drying into the directional coating process is as follows: The coating method of the directional coating process adopts a roll coating-spraying combined system, and realizes thickness control and surface uniform film forming through a precision roller. The spraying device further fills the fiber gap, and the coating thickness closed-loop feedback control system constructed by the online laser thickness gauge stably controls the coating thickness of the strong glass fiber cloth in the range of 10 to 30 μm. The tension state before and after the directional coating process is maintained by the heat-tension control system continued from the drying stage.

[0012] Further, in step S4, the method for conveying the coated strong glass fiber cloth into the segmented air cooling curing area for temperature reduction and shaping after preliminary low-temperature curing is as follows: The finished coated strong glass fiber cloth is preliminarily cured at a low temperature of 35-45 DEG C, the conveying time is controlled to be 60-90 s, and then the strong glass fiber cloth is sent into a segmented air cooling curing area, the segmented air cooling curing area is divided into a cooling section 1, a cooling section 2 and a cooling section 3, the air cooling temperature zone of the cooling section 1 is set to be 35 DEG C ± 2 DEG C, the air outlet wind speed is 4.5 m / s, and the section length is 1.5 m, the air cooling temperature zone of the cooling section 2 is set to be 28 DEG C ± 2 DEG C, the air outlet wind speed is 5.0 m / s, and the section length is 2.0 m, and the air cooling temperature zone of the cooling section 3 is set to be 20 DEG C ± 2 DEG C, the air outlet wind speed is 5.5 m / s, and the section length is 2.5 m.

[0013] Further, in step S4, the coated strong glass fiber cloth is preliminarily cured at a low temperature, and then sent into a segmented air cooling curing area to perform temperature reduction and shaping. The temperature gradient control is realized by setting the air cooling modules with different cooling rates, a temperature reduction path is constructed, the heat-tension control system realizes linkage adjustment to maintain the constant tension of the strong glass fiber cloth, when the tension of the strong glass fiber cloth is detected to be less than 1.4 N / cm, the heat-tension control system automatically slows down the conveying speed, and when the tension of the strong glass fiber cloth is detected to be greater than 1.6 N / cm, the heat-tension control system controls feedback to reduce the end traction.

[0014] Further, in step S5, the appearance of the shaped strong glass fiber cloth is inspected by using an intelligent quality inspection system, and the winding is performed by using an intelligent tension winding system during the inspection. The appearance of the shaped strong glass fiber cloth is inspected by the intelligent quality inspection system, the coating surface defects including but not limited to bubbles, bare spots, horizontal lines, wrinkles and stains are identified and recorded online, the intelligent quality inspection system includes three industrial high frame rate cameras arranged transversely, the industrial high frame rate camera is greater than or equal to 5 million pixels, the image acquisition frequency is greater than or equal to 60 fps, the detection light source is set to be a linear LED cold light source, the brightness is greater than or equal to 10,000 Lux, the color temperature is 5500K, the processing system is set to be an edge computing industrial computer + AI vision algorithm model, and the delay is less than or equal to 50 ms, the intelligent quality inspection system feeds back the detection results to an external industrial touch screen interface in real time, and marks the defect area according to the meter section number.

[0015] Further, in step S5, the appearance of the shaped strong glass fiber cloth is inspected by using an intelligent quality inspection system, and the winding is performed by using an intelligent tension winding system during the inspection. The intelligent tension winding system adopts a high-response servo motor to drive a winding roller, and is provided with a real-time tension detection sensor with a sensitivity of ±0.01 N / cm, a tension control range of 0.8-1.2 N / cm, and a closed-loop tension controller to link the winding motor torque and the linear speed, so as to adjust the winding tension of the strong glass fiber cloth strip in real time, and set the winding specification parameters of the strong glass fiber cloth strip product as a winding diameter of 600-650 mm, a single winding length of 200-500 m, a winding width of 1200 mm, and an edge neatness error of ≤±1.0 mm.

[0016] Advantages Compared with the known prior art, the technical scheme provided by the present application has the following advantages: In use, the present application significantly reduces the deformation of the cloth surface and the accumulation of internal stress in the drying process through multi-section temperature control and tension feedback control, thereby facilitating the improvement of drying efficiency and dimensional stability, the use of zoned drying and low-temperature coating of sizing material reduces heat energy consumption and eliminates the need for secondary high-temperature curing equipment, thereby facilitating the purpose of energy saving and cost reduction, directional coating combined with a composite sizing material formulation improves the strength and surface properties of the finished product, and improves the uniformity and adhesion of the coating, the high integration of the drying and coating links improves the overall line production efficiency and enhances the continuous processing capacity of the method. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The flowchart of the post-treatment process of the strong glass fiber cloth. DETAILED DESCRIPTION

[0018] In order to enable personnel in the technical field to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but includes other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1: like Figure 1 As shown, the present invention provides a post-processing technology for high-strength fiberglass cloth, including the following steps: S1. The surface of the high-strength fiberglass cloth is pretreated, and the tension is pre-distributed and controlled by a mechanical flattening device to flatten the high-strength fiberglass cloth. In this embodiment, the original roll of high-strength fiberglass cloth, with a width of 1200mm, is fed into the processing line by an automatic feeding device. After removing floating dust using a high-efficiency filtration and dust collection device, it is sprayed with a neutral surfactant solution with a mass fraction of 1.5% for chemical cleaning. It is then rinsed twice with pure water at a temperature maintained at 30℃. The initial drying temperature is 70℃ for 60 seconds. The fiber cloth tension is controlled at 2.0±0.1N / cm by a mechanical flattening device equipped with a frequency conversion tensioning roller to ensure consistent pre-tensioning in both the transverse and longitudinal directions.

[0021] S2. After the high-strength glass fiber cloth is flattened, it is continuously introduced into the multi-stage temperature-controlled drying module. During the drying process, a tension closed-loop control system is used for constant tension conveying. In this embodiment, the flattened high-strength fiberglass cloth tape is continuously introduced into three temperature-controlled drying modules at a linear speed of 6.0 m / min. The first section has a temperature of 155°C, a length of 4.0 m, an air velocity of 3.0 m / s, and a drying time of 40 s. The second section has a temperature of 125°C, a length of 3.5 m, an air velocity of 2.5 m / s, and a drying time of 30 s. The third section has a temperature of 75°C, a length of 3.0 m, an air velocity of 2.0 m / s, and a drying time of 25 s. The drying process uses a thermal-tension closed-loop control system to maintain constant tension transmission and dynamically compensate for changes in heat shrinkage rate.

[0022] S3. After the drying is completed, the high-strength glass fiber cloth is fed into the directional coating process under constant tension to obtain the coated high-strength glass fiber cloth. In the present embodiment, the compounding slurry composition is: PU modified acrylate 50%, nano-alumina oxide 20%, siloxane elastomer 10%, block copolymer auxiliary 3%, low-temperature catalyst 1%, and a combination of roll coating and spraying is adopted, a precision roller and an online laser thickness gauge are matched to control the coating thickness to be 20 μm. The preliminary curing is completed at a temperature not higher than 95℃.

[0023] S4, the coated strong glass fiber cloth is sent to a segmented air-cooled curing area for temperature reduction and shaping after preliminary low-temperature curing; In the present embodiment, after preliminary curing, the conveying time is set to be 75 seconds, the cooling section 1 has a temperature of 35±2℃, a wind speed of 4.5 m / s and a length of 1.5 m, the cooling section 2 has a temperature of 28±2℃, a wind speed of 5.0 m / s and a length of 2.0 m, the cooling section 3 has a temperature of 20±2℃, a wind speed of 5.5 m / s and a length of 2.5 m, and a linkage heat-tension system adjusts the traction speed in real time, automatically reduces the speed when the detected tension is lower than 1.4 N / cm, and reduces the tension load when the detected tension is higher than 1.6 N / cm.

[0024] S5, an intelligent quality inspection system is used to perform appearance inspection on the shaped strong glass fiber cloth, and an intelligent tension winding system is used to wind during the inspection process; In the present embodiment, three industrial cameras with a pixel of 5 million, a frame rate of 60 fps and a linear LED cold light source (brightness 10000 Lux, color temperature 5500 K) are configured, an edge AI processing industrial computer is used to identify coating defects (such as wrinkles and bare spots) in real time, the system delay is controlled within 50 ms, the defect positions are automatically numbered, a high-response servo motor and a tension sensor (sensitivity ±0.01 N / cm) are used for winding, the tension control interval is 0.9~1.1 N / cm, and finally the winding finished product has a specification of a diameter of 620 mm, a length of 300 m and an edge neatness of ≤±0.8 mm.

[0025] Embodiment 2: As shown in Figure 1 The present application provides a post-processing process for a strong glass fiber cloth, which comprises the following steps: S1, the surface of the strong glass fiber cloth is pretreated, and a mechanical flattening device is used to perform tension pre-distribution control to flatten the strong glass fiber cloth; S2, the flattened strong glass fiber cloth is continuously introduced into a multi-section temperature control drying module, and a tension closed-loop control system is used to perform constant tension conveying during the drying process; In the present embodiment, the same as in embodiment 1, but the tension pre-distribution is set to be 2.2±0.2 N / cm, and the drying three-section temperature zones are adjusted to be 158℃, 128℃ and 78℃ respectively.

[0026] S3. After the drying is completed, the high-strength glass fiber cloth is fed into the directional coating process under constant tension to obtain the coated high-strength glass fiber cloth. In this embodiment, the compound slurry composition is as follows: 60% PU modified acrylate, 15% nano silica, 12% siloxane elastomer, 3% nonionic additives, 2% low-temperature catalyst, coating thickness controlled at 28 μm, linear velocity controlled at 5.0 m / min, and curing temperature at 90℃.

[0027] S4. After the coated high-strength glass fiber cloth is initially cured at low temperature, it is sent to the segmented air-cooled curing zone for cooling and shaping. In this embodiment, the cooling section remains the same as in Embodiment 1, but the tension monitoring range is controlled at 1.3~1.7 N / cm.

[0028] S5. Use an intelligent quality inspection system to perform an appearance inspection on the shaped high-strength glass fiber cloth, and use an intelligent tension winding system to wind it during the inspection process. In this embodiment, the camera image frame rate is increased to 75fps, the AI ​​model introduces a defect type classification and recognition function, the winding tension is precisely controlled at 1.0±0.05N / cm, the finished product single roll specifications are 650mm in diameter, 400m in length, and edge neatness ≤±1mm.

[0029] Example 3: like Figure 1 As shown, the present invention provides a post-processing technology for high-strength fiberglass cloth, including the following steps: S1. The surface of the high-strength fiberglass cloth is pretreated, and the tension is pre-distributed and controlled by a mechanical flattening device to flatten the high-strength fiberglass cloth. S2. After the high-strength glass fiber cloth is flattened, it is continuously introduced into the multi-stage temperature-controlled drying module. During the drying process, a tension closed-loop control system is used for constant tension conveying. In this embodiment, S1~S2 adopts an automatic vision-assisted flattening and calibration system, the tension is set to 2.0±0.05N / cm, the drying path temperature is set to 160℃, 130℃ and 80℃, and the conveying speed is increased to 6.5m / min.

[0030] S3. After the drying is completed, the high-strength glass fiber cloth is fed into the directional coating process under constant tension to obtain the coated high-strength glass fiber cloth. In this embodiment, the compound slurry composition is as follows: 45% PU modified substrate, 25% nano-zirconia, 10% flexibility agent, 5% wetting agent, and ≤2% catalyst. A roller coating + spray coating + ultrasonic atomization assisted method is used, and a laser thickness gauge with dual-channel feedback is employed to achieve high-precision coating control of 15μm±1μm.

[0031] S4, the coated strong glass fiber cloth is sent into a subsection air-cooling curing area for temperature reduction and shaping after preliminary low-temperature curing; In the embodiment, a variable frequency multi-air duct air-cooling system is adopted, the air speed and air outlet angle of each section can be dynamically adjusted according to the incoming material temperature, the tension feedback interval is shortened to 20 ms, and more stable conveying is realized.

[0032] S5, the shaped strong glass fiber cloth is subjected to appearance inspection by using an intelligent quality inspection system, and is wound by using an intelligent tension winding system during the inspection process; In the embodiment, four 800 million pixel industrial cameras are provided, the frame rate is 80 fps, the AI algorithm has defect tracking and traceability analysis functions, the winding system realizes automatic switching and winding functions, and the single winding specification is: diameter 600 mm, length 500 m, and edge neatness ≤±0.5 mm.

[0033] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A post-treatment process of a strong glass fiber cloth, characterized by, The method comprises the following steps: S1, surface pretreatment is performed on the strong glass fiber cloth, and a mechanical flattening device is used for tension pre-distribution control, so that the strong glass fiber cloth is flattened; S2, the flattened strong glass fiber cloth is continuously introduced into a multi-section temperature control drying module, and a constant tension conveying is performed by using a tension closed loop control system during the drying process; S3, after the drying is completed, the strong glass fiber cloth is conveyed into a directional coating process by constant tension, and a coated strong glass fiber cloth is obtained; S4, after the coated strong glass fiber cloth is preliminarily cured at low temperature, it is sent into a segmented air cooling curing area for temperature reduction and shaping; S5, an intelligent quality inspection system is used for appearance inspection of the shaped strong glass fiber cloth, and an intelligent tension winding system is used for winding during the inspection process.

2. A post-treatment process of a strong glass fiber cloth according to claim 1, characterized in that, In step S1, the surface of the strong glass fiber cloth is pretreated, and a mechanical flattening device is used for tension pre-distribution control, so that the strong glass fiber cloth is flattened. The original roll of strong glass fiber cloth is sent into a pretreatment line through an automatic feeding device, and a mechanical flattening device is used to control the initial strong glass fiber cloth tension in the range of 2.0±0.2N / cm. The pretreatment is to clean the surface of the strong glass fiber cloth, remove dust, impurities and oil stains attached to the surface of the strong glass fiber cloth, and adopt a physical dust removal-chemical cleaning-hot air preliminary drying three-in-one combined technology, including physical dust removal by high efficiency filtration dust collection device, chemical cleaning by neutral surfactant, and preliminary drying by hot air circulation drying system after washing by pure water. The drying temperature is controlled in the range of 60~80℃. Then, the pretreated strong glass fiber cloth is subjected to tension pre-distribution control by the mechanical flattening device, so that the strong glass fiber cloth is in a pre-tensioned state in the transverse and longitudinal directions.

3. A post-treatment process of a strong glass fiber cloth according to claim 2, characterized in that, In step S2, the strong glass fiber cloth is flattened and continuously introduced into a multi-section temperature control drying module, and a constant tension conveying is performed by using a tension closed loop control system during the drying process. The strong glass fiber cloth is flattened and continuously introduced into a multi-section temperature control drying module, and sequentially passes through temperature gradient drying sections set to 150℃~160℃, 120℃~130℃ and 70℃~80℃, to build a drying path of the thermal-mechanical coupling response characteristics of the strong glass fiber cloth. The drying path is divided into three sections. The first section has a temperature range of 150~160℃, a length of 4.0m, a wind speed of 3.0m / s and a drying time of 30~45s. The second section has a temperature range of 120~130℃, a length of 3.5m, a wind speed of 2.5m / s and a drying time of 25~35s. The third section has a temperature range of 7~80℃, a length of 3.0m, a wind speed of 2.0m / s and a drying time of 20~30s. The strong glass fiber cloth has a belt line speed of 5.0~6.5 m / min.

4. A post-treatment process of a strong glass fiber cloth according to claim 3, characterized in that, In step S2, the strong glass fiber cloth is flattened and continuously introduced into a multi-section temperature control drying module, and a constant tension conveying is performed by using a tension closed loop control system during the drying process. In the drying path, a heat-tension control system is applied to the mechanical flattening device to build a real-time tension-speed feedback loop with a high-sensitivity tension sensor and a variable-frequency driving traction roller, and dynamic adjustment is made by a PLC control unit to realize constant-tension conveying of the strong glass fiber cloth between each temperature section. The heat-tension control system compensates for the thermal shrinkage and length change of the strong glass fiber cloth caused by water evaporation in real time.

5. A post-treatment process of a strong glass fiber cloth according to claim 4, characterized in that, In step S3, the strong glass fiber cloth after drying is conveyed into the directional coating process by constant tension to obtain the coated strong glass fiber cloth. In the drying process is completed, the strong glass fiber cloth is transported into the directional coating process by constant tension, the directional coating process uses low-temperature curing type multi-component compound slurry, the components of the compound slurry include polymer film-forming base material, inorganic reinforcing particles, flexibility modifier, wetting and dispersing aid and low-temperature catalyst, the polymer film-forming base material includes but is not limited to using PU modified acrylate, the content range is 45%~60%, the inorganic reinforcing particles include but are not limited to using nano 、 , the content range is 15%~25%, the flexibility modifier is siloxane elastomer, the content range is 5%~15%, the wetting and dispersing aid is non-ionic block copolymer, the content range is 1%~5%, the low-temperature catalyst content range is ≤3%, the compound slurry has rheological properties and low-temperature reaction characteristics, and the preliminary curing is completed under the condition that the temperature does not exceed 100 DEG C.

6. A post-treatment process of a strong glass fiber cloth according to claim 5, characterized in that, In step S3, the strong glass fiber cloth after drying is conveyed into the directional coating process by constant tension to obtain the coated strong glass fiber cloth. The coating method of the directional coating process adopts a combination of roll coating and spray coating systems, and realizes thickness control and uniform surface film formation through precision rollers. The spray coating device further fills the fiber gap, and the coating thickness closed-loop feedback control system built by the online laser thickness gauge stably controls the coating thickness of the strong glass fiber cloth in the range of 10-30 μm. The tension state before and after the directional coating process is maintained by the heat-tension control system continued from the drying stage.

7. A post-treatment process of a strong glass fiber cloth according to claim 6, characterized in that, In step S4, after the coated strong glass fiber cloth is preliminarily cured at a low temperature, it is sent into a segmented air-cooling curing area for temperature reduction and shaping. After the coated strong glass fiber cloth is preliminarily cured at a low temperature of 35-45°C, the conveying time is controlled to be 60-90 s, and it enters the segmented air-cooling curing area. The segmented air-cooling curing area is divided into cooling section 1, cooling section 2 and cooling section 3. The air-cooling temperature zone of the cooling section 1 is set to 35°C±2°C, the air outlet speed is 4.5 m / s, and the section length is 1.5 m. The air-cooling temperature zone of the cooling section 2 is set to 28°C±2°C, the air outlet speed is 5.0 m / s, and the section length is 2.0 m. The air-cooling temperature zone of the cooling section 3 is set to 20°C±2°C, the air outlet speed is 5.5 m / s, and the section length is 2.5 m.

8. A post-treatment process of a strong glass fiber cloth according to claim 7, characterized in that, In step S4, after the coated strong glass fiber cloth is preliminarily cured at a low temperature, it is sent into a segmented air-cooling curing area for temperature reduction and shaping. The temperature gradient control is realized by setting air-cooling modules with different cooling rates to build a temperature reduction path. The heat-tension control system realizes linkage adjustment to maintain the constant tension of the strong glass fiber cloth. When the tension of the strong glass fiber cloth is detected to be <1.4 N / cm, the heat-tension control system automatically slows down the transmission speed. When the tension of the strong glass fiber cloth is detected to be >1.6 N / cm, the heat-tension control system controls the feedback to reduce the end traction.

9. A post-treatment process of a strong glass fiber cloth according to claim 8, characterized in that, In step S5, the appearance of the shaped strong glass fiber cloth is inspected by an intelligent quality inspection system, and the winding is performed by an intelligent tension winding system during the inspection process. The intelligent quality inspection system performs appearance inspection on the shaped strong glass fiber cloth, and performs online identification and recording on coating surface defects including but not limited to bubbles, bare spots, horizontal lines, wrinkles and stains. The intelligent quality inspection system comprises three industrial high frame rate cameras arranged horizontally, the industrial high frame rate camera is greater than or equal to 5 million pixels, the image acquisition frequency is greater than or equal to 60 fps, the detection light source is a linear LED cold light source, the brightness is greater than or equal to 10,000 Lux, the color temperature is 5500K, the processing system is an edge computing industrial computer + AI vision algorithm model, the delay is less than or equal to 50 ms, the intelligent quality inspection system feeds back the detection result to an external industrial touch screen interface in real time, and marks the defect area according to the meter section number.

10. A post-treatment process for a strong glass fiber cloth according to claim 8, characterized in that, In step S5, the shaped strong glass fiber cloth is subjected to appearance inspection by the intelligent quality inspection system, and the method for winding in the inspection process is as follows: The intelligent tension winding system adopts a high-response servo motor to drive a winding roller, is configured with a real-time tension detection sensor with a sensitivity of ±0.01 N / cm, and a tension control range of 0.8~1.2 N / cm, and through a closed-loop tension controller, the torque and linear speed of the winding motor are linked to adjust the winding tension of the strong glass fiber cloth in real time, and the winding specification parameters of the strong glass fiber cloth product are set as a winding diameter of 600~650 mm, a single winding length of 200~500 m, a winding width of 1200 mm and an edge alignment error of less than or equal to ±1.0 mm.

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