A continuous fiber wet winding process technology method and device with post-positioned large tension

Abstract

A kind of continuous fiber wet winding process technology method and device of post large tension, it is characterized in that, including the following procedures: fiber yarn route design, fiber spread yarn thinning control, impregnation auxiliary adjustment, winding resin preparation, fiber impregnation adjustment, impregnated fiber spread yarn extrusion glue adjustment, winding tension adjustment, winding line design, solidification and mechanical property test.The device of the application is simple, can be popularized and applied, and low wear winding under large winding tension can be realized.The present application effectively solves the process problem that traditional process cannot simultaneously realize fiber low damage impregnation and fiber large tension precision winding by designing special winding device and matching winding process, and provides an efficient process technology path for realizing high fiber volume content and high mechanical property fiber composite material preparation.

Description

Technical Field

[0001] A continuous fiber wet winding process and apparatus with high post-tension can be used to prepare wound rotating structures. Background Technology

[0002] Due to their advantages such as high specific strength, high fiber strength utilization, good quality stability, corrosion resistance, and versatile design, fiber-wound resin-based composite products are widely used in the industrial production of large rotating structural components in military and civilian fields, including pressure vessels, rocket fuel tanks, drive shafts, and drill rods. Sufficient resin impregnation of the fibers during the winding process is a prerequisite for ensuring efficient fiber mechanical strength. To improve impregnation, increasing winding tension is often used industrially to promote fiber spreading and achieve better impregnation. Increasing winding tension also increases fiber volume content, which is beneficial for improving the structural efficiency of the wound product. However, increasing tension can intensify friction between fibers and between fibers and guide rollers, leading to problems such as fiber fuzzing and breakage, a decrease in the utilization rate of carbon fiber mechanical strength, and even structural instability in the wound product. How to reduce fiber damage while achieving excellent impregnation is a problem that needs to be solved in the process. Patent (CN101618809A) discloses a low-damage controlled yarn release device and method, which automatically controls the lateral movement of the yarn guide by setting the initial trigger angle through software, thereby reducing friction. Patent (CN112793042A) discloses a non-destructive fiber impregnation method for wet fiber winding. This method uses a specially designed impregnation tank to allow resin to flow from top to bottom and impregnate the fibers that are wound from left to right, thus achieving non-destructive impregnation. However, most current methods can only achieve either low-loss yarn unwinding or high-efficiency impregnation, and the ideal process state of simultaneously achieving low-damage winding and high-efficiency impregnation remains unsolved. The main problems include complex and poorly adaptable equipment, mismatch between material systems and winding processes, and high fiber wear rates. To address these issues, this patent proposes a post-positioned high-tension continuous fiber wet winding process technology and apparatus. By designing a universally applicable and simple apparatus and yarn path, it first uses low-tension yarn unwinding for high-efficiency impregnation. After impregnation, the resin forms a protective film, achieving low-damage, high-tension precision winding, reducing the fiber's process damage rate, and providing a feasible path for preparing wound products with high fiber volume content. Summary of the Invention

[0003] This invention patent proposes a post-tension, high-tension continuous wet winding process technology and apparatus for fibers. It addresses the problems of existing apparatus being complex and poorly adaptable, having mismatched material systems and winding processes, and high fiber wear rates. It simultaneously achieves efficient impregnation and low-loss, high-tension precision winding. By adjusting the spatial parameters between the spreading rollers, the fiber spreading is made thinner under pre-tension. The fiber surface is treated by an electrostatic generator. Based on a unique resin formulation design and a special spreading impregnation structure, the winding process parameters are specifically adjusted according to different resin rheological properties, significantly improving the resin wetting effect. The resin coating on the fiber surface acts as a protective layer, reducing fiber friction under high winding tension, thus simultaneously achieving efficient impregnation and low-loss, high-tension precision winding.

[0004] To achieve the above objectives, the above technical problems can be solved through the following technical solutions:

[0005] 1. A post-tension continuous fiber wet winding device and process technology, characterized in that it specifically includes the following steps:

[0006] 1) Fiber yarn path design: Install the fiber onto the yarn feeding frame, and guide the fiber to follow the order of the yarn feeding frame and the front small tension device (1), the separating comb (2), the yarn spreading device (3), the electrostatic generator (4), the glue tank (5), the yarn spreading and glue extrusion device (6), the rear large tension device (7), the yarn nozzle (8), and the core mold (9).

[0007] 2) Fiber spreading thinning control: The fiber is fed in a "down-up-down" manner, and the spatial position parameters of the guide roller are adjusted according to the fiber bundle coefficient n to control the fiber spreading width and thickness; the spatial parameter of the feeding distance L is set to 50-300mm, and the feeding angle α is set to 25-70°.

[0008] 3) Impregnation-assisted adjustment: Turn on the electrostatic generator (4) and adjust the electrostatic output parameters according to the winding speed and fiber bundle coefficient: When the winding speed is 0.1-1.0m / s, the output voltage is set to 5-10kV and the discharge interval is set to 5-10s; when the winding speed is 1.0-2.5m / s, the output voltage is set to 10-20kV and the discharge interval is set to 1-5s; when the winding speed is 2.5-5.0m / s, the output voltage is set to 20-30kV and the discharge interval is set to 0-1s; when the fiber bundle coefficient n is 1-2, the vertical distance between the electrostatic generator port and the fiber surface is set to 10-30mm; when the fiber bundle coefficient n is 2-5, the vertical distance between the electrostatic generator port and the fiber surface is set to 30-80mm; when n>5, the vertical distance between the electrostatic generator port and the fiber surface is set to 80-100mm.

[0009] 4) Preparation of winding resin: First, mix the main resin, diluent, and film-forming agent in a planetary mixer in a certain proportion and set aside; Second, heat and mix the main curing agent and accelerator under mechanical stirring and set aside; Third, mix the resin and curing agent components prepared above in a planetary mixer at a certain temperature and set aside, and test the viscosity using a rotational viscometer.

[0010] 5) Fiber impregnation adjustment: Add the above resin to the impregnation tank (5), and set the impregnation tank parameters according to the rheological properties of the winding resin: For resin systems with room temperature viscosity between 0-1000 mPa·s, the impregnation tank temperature is set to 25-30℃, and the distance between the doctor blade (5-2) and the impregnation roller (5-1) is set to 1.0-1.5 mm; For resin systems with room temperature viscosity between 1000-3000 mPa·s, the impregnation tank temperature is set to 30-50℃, and the distance between the doctor blade and the impregnation roller is set to 0.5-1.0 mm; For resin systems with a pressure range of 3000-10000 mPa·s, the impregnation tank temperature is set to 50-100℃, and the distance between the doctor blade and the impregnation roller is set to 0.1-0.5 mm. The distance between the guide roller 4 and the impregnation roller is set according to the winding speed: when the winding speed is 0.1-1.0 m / s, the distance is set to 50-100 mm; when the winding speed is 1.0-2.5 m / s, the distance is set to 100-200 mm; when the winding speed is 2.5-5.0 m / s, the distance is set to 200-300 mm.

[0011] 6) Adjustment of Glue Spreading and Extrusion of Impregnated Fibers: Adjust the speed and stroke of the reciprocating motor (6-4) according to the fiber bundle coefficient n to promote further spreading and impregnation of the gluten-impregnated fibers: When the fiber bundle coefficient n≤1, the speed of the reciprocating motor is 7-10 times / second and the stroke is 100-150mm; when the fiber bundle coefficient n is 1-5, the speed of the reciprocating motor is 3-6 times / second and the stroke is 50-80mm; when the fiber bundle coefficient n>5, the speed of the reciprocating motor is 1-3 times / second and the stroke is 20-50mm.

[0012] 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame and set the front small tension to 5-25N; adjust the input current of the magnetic powder coupler (7-1) in the rear large tension device and set the rear large tension to 25-300N;

[0013] 8) Winding pattern design: The winding pattern is designed according to the type and size of the mandrel. The spiral winding angle is 10-70°, the circumferential winding angle is 85-90°, and the winding tension gradually decreases according to the number of winding layers (1N / 3-5 layers).

[0014] 9) Curing: The wound rotary body prepared in step 8) is placed in a special curing oven and heated and cured in sections according to a certain curing regime;

[0015] 10) Mechanical property testing: The tensile strength of the NOL ring of the prepared composite material was tested according to GB / T 1458-2008, the tensile properties of the carbon fiber multifilament were tested according to GB / T 3362-2005, and the hydrostatic burst pressure of the composite material was tested according to GB / T10382-2022.

[0016] The devices included in step 1) include: yarn feeding frame and front small tension device (1), separating comb (2), yarn spreading device (3), electrostatic generator (4), glue dipping tank (5), yarn spreading and glue extrusion device (6), rear large tension device (7), yarn nozzle (8), and core mold (9). These devices are the basis for ensuring that the invention effect of this patent is realized.

[0017] In step 2), the yarn spreading device (3) typically consists of three guide rollers (3-1, 3-2, 3-3). Based on different spatial parameters, the Wilson theoretical formula is modified according to the fiber count and actual yarn spreading constraints to obtain a yarn spreading width that satisfies formula (1) and a yarn spreading thickness that satisfies formula (2).

[0018]

[0019]

[0020] Wherein, W is the width of the fiber spread on the fixed guide roller 2 (3-2), T is the thickness of the fiber spread on the fixed guide roller 2 (3-2), A is the cross-sectional area of ​​the fiber on the fixed guide roller 2 (3-2), L is the yarn travel distance, α is the yarn travel angle, n is the fiber bundle coefficient, and k is the spreading coefficient. When n≤1, k=1, and when n>1, k=0.85*n. Preferably, the spatial parameter yarn travel distance L is 50-300mm, and the yarn travel angle α is 25-70°.

[0021] In step 3), turning on the electrostatic generator (4) helps to increase the surface energy of the fiber. The charge on the fiber surface can adsorb resin molecules, thereby achieving a better wetting effect. The output voltage of the electrostatic generator is adjusted to 0.1-30kV, the air discharge electrostatic holding time is ≥10s, and the discharge interval is 0.05-99.99s. Preferably, when the winding speed is 0.1-1.0 m / s, the output voltage is set to 5-10 kV and the discharge interval is set to 5-10 s; when the winding speed is 1.0-2.5 m / s, the output voltage is set to 10-20 kV and the discharge interval is set to 1-5 s; when the winding speed is 2.5-5.0 m / s, the output voltage is set to 20-30 kV and the discharge interval is set to 0-1 s; when the fiber bundle coefficient n is 1-2, the vertical distance between the electrostatic generator port and the fiber surface is set to 10-30 mm; when the fiber bundle coefficient n is 2-5, the vertical distance between the electrostatic generator port and the fiber surface is set to 30-80 mm; when n>5, the vertical distance between the electrostatic generator port and the fiber surface is set to 80-100 mm.

[0022] Step 4) involves the preparation of the winding resin in a planetary stirrer. First, the main resin, diluent, and film-forming agent are added to the planetary stirrer in a mass ratio of 100:10-30:1-10. The stirring time is set to 5-15 min, the planetary speed to 5-15 r / min, and the rotation speed to 300-500 r / min. After stirring, cooling yields the main resin system. The main resin is one or more of glycidyl ethers, glycidyl esters, glycidyl amines, and hydantoin epoxy resins; the diluent is butyl glycidyl ether, 1,4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, phenyl glycidyl ether, polypropylene glycol diglycidyl ether, and C... 12-14The first step involves a compound of one or more of the following: fatty glycidyl ether, benzyl glycidyl ether, 1,6-hexanediol diglycidyl ether, and neopentyl glycol diglycidyl ether; the second step involves preparing a curing agent system by heating and mixing the main curing agent and the accelerator under mechanical stirring, wherein the ratio of the main curing agent to the accelerator is 100:1-3, the heating temperature is 60-150℃, the stirring time is 5-15 min, and the mixture is allowed to cool naturally. The curing agent system is then obtained; the curing agent is a compound of one or more of liquid alicyclic amines and liquid / solid aromatic amines; the accelerator is a compound of one or more of imidazole and its derivatives; the main resin system and the curing agent system are mixed and stirred in a planetary vacuum stirrer at a ratio of 100:20-30 for 10-30 min, the stirring speed is 10-30 r / min, the stirring speed is 200-800 r / min, and the vacuum degree is 0.01-0.10 MPa. After mixing and stirring, the resin winding system is obtained by cooling.

[0023] In step 5), the temperature of the impregnation tank needs to be set based on the rheological properties of the resin. For resin systems with a room temperature viscosity between 0-1000 mPa·s, the impregnation tank temperature should be set to 25-30℃, and the distance between the doctor blade (5-2) and the impregnation roller (5-1) should be set to 1.0-1.5 mm; for resin systems with a room temperature viscosity between 1000-3000 mPa·s, the impregnation tank temperature should be set to 30-50℃, and the distance between the doctor blade and the impregnation roller should be set to 0.5-1.0 mm; for resin systems with a room temperature viscosity between 3000- For a resin system with a pressure of 10000 mPa·s, the temperature of the impregnation tank is set to 50-100℃, and the distance between the doctor blade and the impregnation roller is set to 0.1-0.5 mm. The distance between the guide roller 4 and the impregnation roller is set according to the winding speed: when the winding speed is 0.1-1.0 m / s, the distance is set to 50-100 mm; when the winding speed is 1.0-2.5 m / s, the distance is set to 100-200 mm; when the winding speed is 2.5-5.0 m / s, the distance is set to 200-300 mm.

[0024] In step 6), the yarn spreading and glue-extruding device 6 consists of a reciprocating motor (6-4), a transmission frame (6-3), fixed guide rollers 6 (6-6), 7 (6-7), and 8 (6-8), and moving guide rollers 1 (6-1) and 2 (6-2). The reciprocating motor drives the transmission frame (6-3) through a hinge connection, and the moving guide rollers 1 (6-1) and 2 (6-2) perform cyclical motion within a certain trajectory to promote fiber spreading and glue impregnation. The moving guide rollers are concave and convex rollers with an inner and outer diameter difference of 1-5 mm. This facilitates the return of the resin to the impregnation tank after extrusion; the speed of the reciprocating motor is adjusted to 1-10 times / second, and the push stroke is 20-150mm; preferably, when the fiber bundle coefficient n≤1, the speed of the reciprocating motor is 7-10 times / second, and the push stroke is 100-150mm; when the fiber bundle coefficient n is 1-5, the speed of the reciprocating motor is 3-6 times / second, and the push stroke is 50-80mm; when the fiber bundle coefficient n>5, the speed of the reciprocating motor is 1-3 times / second, and the push stroke is 20-50mm.

[0025] In step 7), adjust the front small tension sensor in the yarn unwinding frame and set the front small tension to 0-25N so that the fiber bundle is fully unwound on the yarn spreading device to promote resin impregnation; adjust the input current of the magnetic powder coupler in the rear large tension device and set the rear large tension to 25-300N so as to fully squeeze the resin in the fiber and achieve low-damage, high-tension precision winding under the coating of resin.

[0026] In step 8), the winding pattern is designed according to the type and size of the mandrel. The spiral winding angle is 10-70° and the circumferential winding angle is 85-90°. In order to prevent the outer fiber from squeezing the inner fiber, the winding tension gradually decreases according to the number of winding layers (1N / 3-5 layers), and the winding speed is 0.1-5.0m / s.

[0027] Step 9) Curing: The wound rotating body prepared in step 7) is placed in a special curing oven for heating and curing. Preferably, segmented curing is adopted: a) heating to 60-90℃ and holding for 1-2 hours; b) heating to 100-120℃ and holding for 1-3 hours; c) heating to 130-180℃ and holding for 2-5 hours.

[0028] Step 10) Performance testing is to verify the performance after optimizing the above process parameters. The prepared composite material is tested according to GB / T 1458-2008 for the tensile strength of the NOL ring of the wound product, according to GB / T 3362-2005 for the tensile properties of the carbon fiber multifilament, and according to GB / T 10382-2022 for the water pressure bursting pressure of the wound product.

[0029] Invention Effects

[0030] (1) The present invention effectively solves the problems of complex and poor adaptability of the current device and high fiber wear rate by designing the winding device and matching the winding process, and realizes continuous high-speed wet winding of fibers under high tension.

[0031] (2) Based on the design modification and process adjustment of the material system, the dynamic matching of material physicochemical properties and winding process was realized, achieving the optimized effect of low fiber damage and high fiber mechanical strength of composite. (3) By physically spreading and electrostatically treating the fibers before impregnation, the wetting speed and adhesion of the resin on the fiber surface were improved, effectively improving the resin's wettability to the fibers. (4) Further spreading and extruding the impregnated fibers facilitated further resin impregnation, and the formed resin protective layer reduced the frictional damage of the fibers under high winding tension, with a fiber process damage rate ≤3%. (5) By adopting a winding process method that combines pre-positioned low tension and post-positioned high tension dynamic control, the spreading and impregnation were achieved under low tension, and after further spreading and impregnation, a winding product with high fiber volume content and high mechanical properties was prepared under high winding tension. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a post-winding high-tension process technology;

[0033] Figure 2 This is a schematic diagram of the yarn spreading device;

[0034] Figure 3 This is a schematic diagram of the impregnation tank device;

[0035] Figure 4 This is a schematic diagram of a yarn spreading and extrusion device;

[0036] Figure 5 This is a schematic diagram of a rear-mounted high-tension device;

[0037] In the diagram, 1 is the yarn feeding frame and front-mounted small tension device; 2 is the separating comb; 3 is the yarn spreading device; 4 is the electrostatic generator; 5 is the impregnation tank; 6 is the yarn spreading and extrusion device; 7 is the rear-mounted large tension device; 8 is the yarn nozzle; 9 is the mandrel; 3-1 is the fixed guide roller 1; 3-2 is the fixed guide roller 2; 3-3 is the fixed guide roller 3; 5-4 is the fixed guide roller 4; 5-5 is the fixed guide roller 5; 6-6 is the fixed guide roller 6; 6-7 is the fixed guide roller 7; 6-8 is the fixed guide roller 8; 7-9 is the fixed guide roller 9; 7-10 is the fixed guide roller 10; 5-1 is the impregnation roller; 5-2 is the doctor blade; 6-1 is the moving guide roller 1; 6-2 is the moving guide roller 2; 7-3 is the moving guide roller 3; 6-3 is the transmission frame; 6-4 is the reciprocating motor; 7-1 is the magnetic powder coupler. Detailed Implementation

[0038] The embodiments of the present invention are further illustrated below, but the present invention is not limited to these embodiments.

[0039] 1) Fiber yarn path design: Install the fiber onto the yarn feeding frame, and guide the fiber to follow the order of the yarn feeding frame and the front small tension device 1, the separating comb 2, the yarn spreading device 3, the electrostatic generator 4, the glue dipping tank 5, the yarn spreading and glue extrusion device 6, the rear large tension device 7, the yarn nozzle 8, and the core mold 9.

[0040] 2) Fiber spreading thinning control: The fiber is fed in a "down-up-down" manner, and the spatial position parameters of the guide roller are adjusted according to the fiber bundle coefficient n to control the fiber spreading width and thickness; the spatial parameter of the feeding distance L is set to 50-300mm, and the feeding angle α is set to 25-70°.

[0041] 3) Impregnation-assisted adjustment: Turn on the electrostatic generator and adjust the electrostatic output parameters according to the winding speed and fiber bundle coefficient: When the winding speed is 0.1-1.0m / s, set the output voltage to 5-10kV and the discharge interval to 5-10s; when the winding speed is 1.0-2.5m / s, set the output voltage to 10-20kV and the discharge interval to 1-5s; when the winding speed is 2.5-5.0m / s, set the output voltage to 20-30kV and the discharge interval to 0-1s; when the fiber bundle coefficient n is 1-2, set the vertical distance between the electrostatic generator port and the fiber surface to 10-30mm; when the fiber bundle coefficient n is 2-5, set the vertical distance between the electrostatic generator port and the fiber surface to 30-80mm; when n>5, set the vertical distance between the electrostatic generator port and the fiber surface to 80-100mm.

[0042] 4) Preparation of winding resin: First, mix the main resin, diluent, and film-forming agent in a planetary mixer in a certain proportion and set aside; Second, heat and mix the main curing agent and accelerator under mechanical stirring and set aside; Third, mix the resin and curing agent components prepared above in a planetary mixer at a certain temperature and set aside, and test its viscosity using a rotational viscometer.

[0043] 5) Fiber Impregnation Adjustment: Add the above-mentioned resin to the impregnation tank. Set the impregnation tank parameters according to the rheological properties of the winding resin: For resin systems with room temperature viscosity between 0-1000 mPa·s, set the impregnation tank temperature to 25-30℃ and the distance between the doctor blade and the impregnation roller to 1.0-1.5 mm; for resin systems with room temperature viscosity between 1000-3000 mPa·s, set the impregnation tank temperature to 30-50℃ and the distance between the doctor blade and the impregnation roller to 0.5-1.0 mm; for resin systems with room temperature viscosity between 3000- For a resin system with a pressure of 10000 mPa·s, the impregnation tank temperature is set to 50-100℃, and the distance between the doctor blade and the impregnation roller is set to 0.1-0.5 mm. The distance between the guide roller 1 and the impregnation roller is set according to the winding speed: when the winding speed is 0.1-1.0 m / s, the distance is set to 50-100 mm; when the winding speed is 1.0-2.5 m / s, the distance is set to 100-200 mm; when the winding speed is 2.5-5.0 m / s, the distance is set to 200-300 mm.

[0044] 6) Adjustment of Glue Spreading and Extrusion of Impregnated Fibers: Adjust the speed and stroke of the reciprocating motor according to the fiber bundle coefficient n to promote further spreading and impregnation of the gluten-impregnated fibers: When the fiber bundle coefficient n≤1, the speed of the reciprocating motor is 7-10 times / second and the stroke is 100-150mm; when the fiber bundle coefficient n is 1-5, the speed of the reciprocating motor is 3-6 times / second and the stroke is 50-80mm; when the fiber bundle coefficient n>5, the speed of the reciprocating motor is 1-3 times / second and the stroke is 20-50mm.

[0045] 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame and set the front small tension to 5-25N; adjust the input current of the magnetic powder coupler in the rear large tension device and set the rear large tension to 25-300N;

[0046] 8) Winding pattern design: The winding pattern is designed according to the type and size of the mandrel. The spiral winding angle is 10-70° and the circumferential winding angle is 85-90°. The winding tension gradually decreases according to the number of winding layers (1N / 3-5 layers).

[0047] 9) Curing: Place the wound rotating body prepared in step 8) in a special curing oven and heat and cure it in sections according to a certain curing regime.

[0048] 10) Mechanical property testing: The tensile strength of the NOL ring of the prepared composite material was tested according to GB / T 1458-2008, the tensile properties of the carbon fiber multifilament were tested according to GB / T 3362-2005, and the hydrostatic burst pressure of the composite material was tested according to GB / T10382-2022.

[0049] Example 1

[0050] 1) Fiber yarn path design: Install a single bundle of T700-12K carbon fiber onto the yarn feeding frame. The traction fiber follows the yarn feeding frame and then follows the yarn feeding frame and the front small tension device 1, the separating comb 2, the yarn spreading device 3, the electrostatic generator 4, the impregnation tank 5, the yarn spreading and extrusion device 6, the rear large tension device 7, the yarn nozzle 8, and the core mold 9 in that order.

[0051] 2) Adjustment of yarn spreading device parameters: The fibers are fed in a "down-up-down" pattern. The spatial position parameters of the guide rollers are adjusted according to the fiber bundle coefficient n to control the fiber spreading width and thickness. The spatial parameters, yarn spreading distance L, are adjusted to 50mm, and the yarn spreading angle α is 25°.

[0052] 3) Impregnation-assisted adjustment: Adjust the winding speed to 0.8m / s, turn on the electrostatic generator, set its output voltage to 10kV, set the discharge interval to 5s, and set the vertical distance between the electrostatic generator port and the fiber surface to 10mm.

[0053] 4) Preparation of the winding resin: First, the main resin, diluent, and film-forming agent are added to a planetary stirrer at a mass ratio of 100:20:5. The stirring time is 10 min, the planetary speed is set to 10 r / min, and the rotation speed is set to 400 r / min. After stirring, cooling yields the main resin system. In this embodiment, 4,5-epoxycyclohexane-1,2-dicarboxylic acid diglycidyl ester and bisphenol A diglycidyl ether (50 / 50) are selected as the main resin, butyl glycidyl ether as the diluent, and polyether glycol as the film-forming agent. Second, the main curing agent and accelerator are heated and mixed under mechanical stirring to prepare the curing agent system. The ratio of the main curing agent to the accelerator is 100:1-3, the heating temperature is 80℃, and the stirring time is 10 min. After natural cooling, the curing agent system is obtained. In this embodiment, diethyltoluenediamine is selected as the main curing agent, and benzimidazole is selected as the accelerator. The third step involves mixing the main resin system and the curing agent system in a planetary vacuum mixer at a ratio of 100:25 for 25 minutes. The stirring speed is 20 r / min, the rotation speed is 500 r / min, and the vacuum degree is 0.01 MPa. After mixing and stirring, the mixture is cooled to obtain the wound resin system. The measured viscosity at room temperature is 1200 mPa·s.

[0054] 5) Dipping tank parameter settings: Add the above-prepared winding resin system into the dipping tank, set the dipping tank temperature to 30℃, set the distance between the scraper and the dipping roller to 0.5mm, set the diameter of the dipping roller to 50mm, and set the distance between the guide roller and the dipping roller to 50mm.

[0055] 6) Adjustment of the spreading and extrusion of the dipped fiber: Adjust the speed of the reciprocating motor to 8 times / second and the push stroke to 100mm.

[0056] 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame to set the front small tension to 5N. Adjust the input current of the magnetic powder coupler to make the rear large tension 25N.

[0057] 8) Fiber winding: The impregnated fiber is wound onto the NOL ring mold in a circumferential winding manner. The specific process is as follows: circumferential winding is performed at a winding angle of 89°, with 25 winding turns and the winding tension remains constant.

[0058] 9) Curing: Place the NOL ring prepared in step 8) in a dedicated curing oven and heat it in sections for curing. The specific steps are as follows: a) heat up to 80℃ and keep it at that temperature for 1 hour; b) heat up to 110℃ and keep it at that temperature for 2 hours; c) heat up to 150℃ and keep it at that temperature for 3 hours.

[0059] 10) Performance Testing: The prepared NOL rings were subjected to NOL ring tensile strength testing according to GB / T 1458-2008. No fuzz was found during the winding process. The test results were: 2898±32MPa, with a fiber volume fraction of 66%.

[0060] Example 2

[0061] The fibers were not routed through the yarn spreading device, and the electrostatic generator was turned off. Everything else remained the same as in Example 1. Filaments were found during the winding process, but this did not cause any interruption to the process. The prepared NOL rings were subjected to NOL ring tensile strength testing according to GB / T 1458-2008. The test results were: 2020±46MPa, fiber volume content was 65%, and fiber strength utilization rate was 63.4%. The above results indicate that the presence of the yarn spreading device (3) and the electrostatic generator (4) is beneficial to resin wetting, thereby improving the fiber strength utilization rate.

[0062] Example 3

[0063] Four bundles of Toray T700-12K carbon fiber were used to prepare NOL rings. The number of winding turns in step 8) was changed to 6 turns, and the reciprocating motor stroke was set to 70 mm, while other parameters remained unchanged. Slight fuzzing was observed during winding, but the process was not interrupted. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the results were 3057±48 MPa, with a fiber volume content of 71% and a fiber strength utilization rate of 87.9%. These results indicate that under the device and process proposed in this invention, when multiple fibers are wound simultaneously, good fiber spreading and wetting can be achieved by modifying the reciprocating motor stroke setting, while further increasing the fiber volume fraction.

[0064] Example 4

[0065] Maintaining the initial low tension unchanged, the subsequent high winding tension was adjusted to 50N, with other parameters remaining consistent with Example 1. No fuzzing or filament breakage causing process interruption was observed during winding. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, with a result of 2850±33.1MPa, a fiber volume fraction of 65%, and a fiber strength utilization rate of 89.5%. These results indicate that, under the device and process proposed in this invention, increasing the winding tension can improve the utilization of fiber mechanical strength.

[0066] Example 5

[0067] The pre-winding tension was adjusted to 25N, and the post-winding tension was adjusted to 300N. Other parameters remained the same as in Example 1. Fuzzing was observed during winding, but it did not cause process interruption. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the result was 3083±57MPa, with a fiber volume fraction of 72% and a fiber strength utilization rate of 87.4%. These results indicate that under the device and process proposed in this invention, increasing the winding tension does not cause process interruption due to fuzzing, and it can maintain the efficient utilization of fiber mechanical strength.

[0068] Example 6

[0069] The aforementioned fibers were replaced with quartz fibers, while remaining consistent with Example 1. No fuzzing or fiber breakage causing process interruption was observed during the winding process. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the result was 3586±61 MPa. With a fiber volume content of 68%, the fiber strength utilization rate was 87.9%. These results indicate that the apparatus and process proposed in this invention are applicable to quartz fibers.

[0070] Example 7

[0071] The aforementioned fibers were replaced with E-glass fibers, while remaining consistent with Example 1. No fuzzing or fiber breakage causing process interruption was observed during the winding process. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the result was 1934±47 MPa. Based on a fiber volume content of 67%, the fiber strength utilization rate was 84.9%. These results indicate that the apparatus and process proposed in this invention are applicable to glass fibers.

[0072] Example 8

[0073] In the preparation of the main resin, no film-forming agent was added, and everything else remained the same as in Example 1. No fuzzing or filament breakage causing process interruption was observed during the winding process. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the result was 2782±61 MPa, with a fiber volume content of 69% and a fiber strength utilization rate of 82.3%. These results indicate that, under the device and process proposed in this invention, adding a film-forming agent is beneficial for forming a protective film on the fibers and reducing friction between the fibers and the guide rail.

[0074] Example 9

[0075] The spatial parameters, including the yarn spreading distance L, were 300 mm and the yarn spreading angle α, were 70°, with other parameters remaining consistent with Example 1. No fuzzing or filament breakage causing process interruption was observed during the winding process. The tensile strength of the NOL rings was tested according to GB / T 1458-2008, and the result was 2639±47 MPa. Based on a fiber volume content of 63%, the fiber strength utilization rate was 85.5%. These results indicate that, under the device and process proposed in this invention, the yarn spreading situation can be controlled by adjusting the spatial parameters, thereby controlling the impregnation effect.

[0076] In summary, the post-tension continuous fiber wet winding process technology and apparatus provided by the present invention are applicable to fibers such as carbon fiber, glass fiber and quartz fiber. Increasing the winding tension will not cause adverse process problems such as fiber fuzzing or process interruption. After multiple yarn unfoldings, the resin has a better wetting effect on the fiber, which can give full play to the strength of the fiber.

[0077] Example 10

[0078] 1) Fiber yarn path design: Install a single bundle of T700-12K carbon fiber onto the yarn feeding frame, and guide the fiber to follow the following sequence: yarn feeding frame and front small tension device 1, separating comb 2, yarn spreading device 3, electrostatic generator 4, impregnation tank 5, yarn spreading and extrusion device 6, rear large tension device 7, yarn nozzle 8, and core mold 9.

[0079] 2) Adjustment of yarn spreading device parameters: The fibers are fed in a "down-up-down" pattern. The spatial position parameters of the guide rollers are adjusted according to the fiber bundle coefficient n to control the fiber spreading width and thickness. The spatial parameters, yarn spreading distance L, are adjusted to 60mm and yarn spreading angle α, to 40°.

[0080] 3) Impregnation-assisted adjustment: Adjust the winding speed to 0.5m / s, turn on the electrostatic generator, set its output voltage to 10kV, the discharge interval to 5s, and the vertical distance between the electrostatic generator port and the fiber surface to 10mm.

[0081] 4) Preparation of winding resin: The main resin was replaced with bisphenol A diglycidyl ether, the main curing agent was replaced with triethylenetetramine, and acetone was used as the solvent. The resins were mixed in a ratio of 10:1:10 under mechanical stirring at a stirring rate of 600 r / min for 10 min at a temperature of 25℃. The viscosity at room temperature was measured to be 105 mPa·s.

[0082] 5) Dipping tank parameter settings: Add the prepared winding resin system to the dipping tank. Set the dipping tank temperature to 25℃, the distance between the doctor blade and the dipping roller to 1.0mm, and the diameter of the dipping roller to 60mm. Set the distance between the guide roller and the dipping roller to 60mm.

[0083] 6) Adjustment of the spreading and extrusion of the dipped fiber: Adjust the speed of the reciprocating motor to 8 times / second and the push stroke to 100mm.

[0084] 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame to set the front small tension to 5N. Adjust the input current of the magnetic powder coupler to make the rear large tension 25N.

[0085] 8) Fiber winding: The impregnated fiber is wound onto a special mold in a circumferential winding manner to straighten the fiber, and then dried at room temperature.

[0086] 9) Curing: Place the special mold from step 8) in an oven for curing. The curing regime is 120℃ / 2h.

[0087] 10) Performance Testing: The prepared carbon fiber multifilaments were subjected to tensile strength testing according to GB / T 3362-20058. The measured tensile strength of the carbon fiber was 4791±23 MPa.

[0088] Example 11

[0089] In step 7), the initial small tension in the winding tension adjustment was set to 20N, and the subsequent large tension was set to 100N. Everything else remained unchanged from Example 10. The measured tensile strength of the carbon fiber was 4762±26MPa, and the process damage rate was 2.8%. These results demonstrate that, under the apparatus and process proposed in this invention, even a significant increase in the subsequent large tension does not cause a large fiber process damage rate.

[0090] Example 12

[0091] In step 7), the initial small tension in the winding tension adjustment was set to 25 N, resulting in a subsequent large tension of 300 N. Other parameters remained unchanged from Example 10. The measured tensile strength of the carbon fiber was 4752 ± 32 MPa, and the process damage rate was 3.0%. These results indicate that, under the apparatus and process proposed in this invention, a subsequent large tension of 300 N does not cause a significant fiber process damage rate.

[0092] In summary, the continuous wet winding process technology and apparatus for high post-tension fibers provided by this invention has a low fiber process damage rate (≤3.0%) under relatively high winding tension (≤300N).

[0093] Example 13

[0094] 1) Fiber yarn feeding route design: Install 6 bundles of T700-12K carbon fiber onto the yarn feeding frame, and feed the yarn in the following order: yarn feeding frame and front small tension device 1, separating comb 2, yarn spreading device 3, electrostatic generator 4, impregnation tank 5, yarn spreading and extrusion device 6, rear large tension device 7, yarn nozzle 8, and core mold 9.

[0095] 2) Adjustment of yarn spreading device parameters: Adjust the spatial parameter yarn spreading distance L to 100mm and the yarn spreading angle α to 40°.

[0096] 3) Impregnation-assisted adjustment: Adjust the winding speed to 3m / s, turn on the electrostatic generator, set its output voltage to 30kV, the discharge interval to 0.5s, and the vertical distance between the electrostatic generator port and the fiber surface to 100mm.

[0097] 4) Preparation of the winding resin: First, the main resin, diluent, and film-forming agent are added to a planetary stirrer in a mass ratio of 100:20:5. The stirring time is set to 15 min, the planetary speed to 15 r / min, and the rotation speed to 500 r / min. After stirring, cooling yields the main resin system. In this embodiment, bisphenol A diglycidyl ether and triglycidyl p-aminophenol (50 / 50) are used as the main resin, 1,4-butanediol diglycidyl ether as the diluent, and N-methyldiethanolamine as the film-forming agent. Second, the main curing agent and accelerator are heated and mixed under mechanical stirring to prepare the curing agent system. The ratio of the main curing agent to the accelerator is 100:1, the heating temperature is 80℃, and the stirring time is 10 min. After natural cooling, the curing agent system is obtained. In this embodiment, 4,4'-dioxydiphenyl sulfone and diethyltoluenediamine in a ratio of 70:30 are used as the main curing agent, and 1-methylimidazole is used as the accelerator. The third step involves mixing the main resin system and the curing agent system in a planetary vacuum mixer at a ratio of 100:30 for 30 minutes. The stirring speed is 30 r / min, the rotation speed is 800 r / min, and the vacuum degree is 0.10 MPa. After mixing and stirring, the mixture is cooled to obtain the wound resin system. The viscosity at room temperature is measured to be 1530 mPa·s.

[0098] 5) Dipping tank parameter settings: Add the prepared winding resin system to the dipping tank. Set the dipping tank temperature to 40℃, the distance between the doctor blade and the dipping roller to 0.7mm, and the radius of the dipping roller to 100mm. Set the distance between the guide roller and the dipping roller to 200mm.

[0099] 6) Adjusting the spreading and extrusion of the dipped fiber: Adjust the speed of the reciprocating motor to 1 time / second and the push stroke to 30mm.

[0100] 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame to set the front small tension to 15N. Adjust the input current of the magnetic powder coupler to make the rear large tension 50N.

[0101] 8) Fiber Winding: Simulation design was conducted based on a working pressure of 70MPa. According to the simulation calculation results, the impregnated fiber was wound onto the mandrel using circumferential and spiral winding methods. The specific process included: a) Circumferential winding: Circumferential winding was performed at a winding angle of 89°. The winding tension was reduced by 1N every 3 layers, and the number of winding layers was 15. b) Spiral winding: Spiral winding was performed at winding angles of 13 / 24 / 39 / 43°. The winding tension was reduced by 1N every 3 layers, and the number of winding layers was 5 / 5 / 7 / 10 respectively. A multi-point layup line was used, and the intersection points were controlled at 4 / 4 / 3 / 4. c) A transition line was designed, followed by circumferential winding at a winding angle of 89°. The winding tension was reduced by 1N every 3 layers, and the number of winding layers was 15. The wound rotating structure could be obtained by following the above winding process.

[0102] 9) Curing: Place the wound rotating body prepared in step 8) in a special curing oven and heat it in sections for curing. The specific steps are: a) heat up to 90℃ and keep it at that temperature for 2 hours; b) heat up to 120℃ and keep it at that temperature for 3 hours; c) heat up to 180℃ and keep it at that temperature for 5 hours.

[0103] 10) Performance Testing:

[0104] According to GB / T 10382-2022, the water pressure bursting pressure of the wound product was tested, and the test result was 181.23 MPa.

[0105] Example 14

[0106] The post-tension was set to 140 N, and other conditions were the same as in Example 13. The hydrostatic burst pressure of the wound product was tested according to GB / T10382-2022, and the result was 191.3 MPa. These results indicate that, under the device and process proposed in this invention, increasing the post-tension significantly improves the burst pressure of the shell.

[0107] In summary, the post-tension continuous fiber wet winding process and apparatus provided by this invention can be applied to the manufacture of pressure vessels. Results show that increasing the winding tension can effectively increase the hydraulic burst pressure of the wound product, indicating that the fiber damage degree under this process is low and it can be applied to the winding preparation of other wound products.

[0108] Table 1 Summary of NOL Ring Performance and Process Damage Rate

[0109]

[0110] In summary, the post-tension, high-tension continuous fiber wet winding process and apparatus provided by this invention are applicable to the preparation of NOL rings, multifilaments, and pressure vessels. Results show that under this winding apparatus and process, the fiber damage rate is low, and the fiber's mechanical strength is effectively utilized. Furthermore, the apparatus of this invention is simple in design and can be used for the upgrading and modification of existing winding production lines, demonstrating good versatility.

Claims

1. A post-processed high-tension continuous fiber wet winding technique, characterized in that, Specifically, the following steps are included: 1) Fiber yarn path design: Install the fiber onto the yarn feeding frame, and guide the fiber to follow the order of the yarn feeding frame and the front small tension device (1), the separating comb (2), the yarn spreading device (3), the electrostatic generator (4), the glue tank (5), the yarn spreading and glue extrusion device (6), the rear large tension device (7), the yarn nozzle (8), and the core mold (9). 2) Fiber spreading thinning control: The fiber is fed in a "down-up-down" manner, and the spatial position parameters of the three fixed guide rollers (3-1, 3-2, 3-3) are adjusted according to the size of the fiber bundle coefficient n to control the fiber spreading width and thickness; The spatial parameter, yarn travel distance L, is set to 50-300 mm, and the yarn travel angle is... Set to 25-70°; 3) Impregnation-assisted adjustment: Turn on the electrostatic generator (4) and adjust the electrostatic output parameters according to the winding speed and fiber bundle coefficient: When the winding speed is 0.1-1.0 m / s, the output voltage is set to 5-10 kV and the discharge interval is set to 5-10 s; when the winding speed is 1.0-2.5 m / s, the output voltage is set to 10-20 kV and the discharge interval is set to 1-5 s; when the winding speed is 2.5-5.0 m / s, the output voltage is set to 20-30 kV and the discharge interval is set to 0-1s; when the fiber bundle coefficient n is 1~2, the vertical distance between the electrostatic generator port and the fiber surface is set to 10-30 mm; when the fiber bundle coefficient n is 2-5, the vertical distance between the electrostatic generator port and the fiber surface is set to 30-80 mm; when n>5, the vertical distance between the electrostatic generator port and the fiber surface is set to 80-100 mm. 4) Preparation of winding resin: First, mix the main resin, diluent, and film-forming agent in a planetary mixer in a certain proportion and set aside; Second, heat and mix the main curing agent and accelerator under mechanical stirring and set aside; Third, mix the resin and curing agent components prepared above in a planetary mixer at a certain temperature and set aside, and test its viscosity using a rotational viscometer. 5) Fiber Impregnation Adjustment: Add the above resin to the impregnation tank (5). Set the impregnation tank parameters according to the rheological properties of the winding resin: For resin systems with room temperature viscosity between 0-1000 mPa·s, set the impregnation tank temperature to 25-30 ℃ and the distance between the doctor blade (5-2) and the impregnation roller (5-1) to 1.0-1.5 mm; for resin systems with room temperature viscosity between 1000-3000 mPa·s, set the impregnation tank temperature to 30-50 ℃ and the distance between the doctor blade and the impregnation roller to 0.5-1.0 mm; for resin systems with viscosity between 3000-10000 mPa·s, set the impregnation tank temperature to 50-100 ℃ and the distance between the doctor blade and the impregnation roller to 0.1-0.5 mm; Set the distance between the guide rollers (5-4, 5-5) and the impregnation roller according to the winding speed: When the winding speed is 0.1-1.0 m / s, the distance is set to 50-100 mm. mm; when the winding speed is 1.0-2.5 m / s, the distance is set to 100-200 mm; when the winding speed is 2.5-5.0 m / s, the distance is set to 200-300 mm; 6) Adjustment of Glue Spreading and Extrusion of Impregnated Fibers: Adjust the speed and stroke of the reciprocating motor (6-4) according to the fiber bundle coefficient n to promote further spreading and impregnation of the gluten-impregnated fibers: When the fiber bundle coefficient n≤1, the speed of the reciprocating motor is 7-10 times / second and the stroke is 100-150 mm; when the fiber bundle coefficient n is 1-5, the speed of the reciprocating motor is 3-6 times / second and the stroke is 50-80 mm; when the fiber bundle coefficient n>5, the speed of the reciprocating motor is 1-3 times / second and the stroke is 20-50 mm. 7) Winding tension adjustment: Adjust the front small tension sensor in the yarn feeding frame and set the front small tension to 5-25 N; adjust the input current of the magnetic powder coupler (7-1) in the rear large tension device and set the rear large tension to 25-300 N; 8) Winding pattern design: The winding pattern is designed according to the type and size of the mandrel. The spiral winding angle is 10-70° and the circumferential winding angle is 85-90°. The winding tension gradually decreases according to the number of winding layers (1N / 3-5 layers). 9) Curing: Place the wound rotary body prepared in step 8) in a special curing oven and heat and cure it in sections according to a certain curing regime; 10) Mechanical property testing: The tensile strength of the NOL ring of the prepared composite material was tested according to GB / T 1458-2008, the tensile properties of the carbon fiber multifilament were tested according to GB / T 3362-2005, and the hydrostatic burst pressure of the composite material was tested according to GB / T 10382-2022.

2. The method for a post-tensioned high-tension continuous fiber wet winding process according to claim 1, characterized in that, The continuous fibers include carbon fiber, glass fiber, quartz fiber, and aramid fiber.

3. The method for a post-tensioned high-tension continuous fiber wet winding process according to claim 1, characterized in that, The main resin is one or a compound of several of glycidyl ethers, glycidyl esters, glycidyl amines, and hydantoin epoxy resins; the diluent is butyl glycidyl ether, 1,4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, phenyl glycidyl ether, polypropylene glycol diglycidyl ether, C 12-14 The film-forming agent is a compound of one or more of the following: fatty glycidyl ether, benzyl glycidyl ether, 1,6-hexanediol diglycidyl ether, and neopentyl glycol diglycidyl ether; the film-forming agent is a compound of one or more of the following: polyether glycol, diisocyanate, N-methyldiethanolamine, hyperbranched polyamide, methyl acrylate, methyl methacrylate, and acrylic acid; wherein the mass ratio of the main resin, diluent, and film-forming agent is 100:10-30:1-10, the stirring time is 5-15 min, the stirring speed is 5-15 r / min, and the stirring speed is 300-500 r / min; the curing agent is a compound of one or more of the following: liquid alicyclic amine and liquid / solid aromatic amine; the accelerator is a compound of one or more of the following: imidazole and its derivatives; the curing agent system is prepared by mixing the main curing agent and the accelerator under heating and mechanical stirring, wherein the ratio of the main curing agent to the accelerator is 100:1-3, and the heating temperature is 60-150°C. The resin system was prepared in a planetary mixer. The resin system and the curing agent system were mixed in a planetary vacuum mixer at a ratio of 100:20-30 for 10-30 minutes. The stirring speed was 10-30 r / min, the rotation speed was 200-800 r / min, and the vacuum degree was 0.01-0.10 MPa. After mixing and stirring, the resin system was cooled to obtain the winding resin system. The winding resin system has fluidity in the temperature range of 30-100 °C.

4. The post-tension, high-tension continuous fiber wet winding process according to claim 1, characterized in that, The curing process is as follows: a) heat to 60-90 ℃ and hold for 1-2 h; b) heat to 100-120 ℃ and hold for 1-3 h; c) heat to 130-180 ℃ and hold for 2-5 h.

5. The post-tension, high-tension continuous fiber wet winding process according to claim 1, characterized in that, The fiber bundle coefficient n = number of single filaments of the yarn / 12000.

6. The method for a post-tensioned high-tension continuous fiber wet winding process according to claim 1, characterized in that, The yarn spreading device (3) consists of three fixed guide rollers (3-1, 3-2, 3-3) arranged in a certain spatial distribution. The spatial parameters of the guide rollers are adjusted according to the size n of the fiber bundle to control the fiber spreading width and thickness. The spatial parameters of the guide rollers and the spreading width satisfy formula (1), and the spreading thickness satisfies formula (2). W= (1) T= (2) Where W is the fiber spreading width on the fixed guide roller 2 (3-2), T is the fiber spreading thickness on the fixed guide roller 2 (3-2), A is the cross-sectional area of ​​the fiber on the fixed guide roller 2 (3-2), and L is the yarn travel distance. The angle between the yarns is denoted by n, which is the fiber bundle coefficient; k is the spreading coefficient. When n≤1, k=1, and when n>1, k=0.85*n.

7. The method for a post-tension high-contraction continuous fiber wet winding process according to any one of claims 1-6 employs a post-tension high-contraction continuous fiber wet winding device, characterized in that, The equipment required for this winding process includes: a yarn feeding frame and a pre-tensioning device (1), a separating comb (2), a yarn spreading device (3), an electrostatic generator (4), a glue-impregnating tank (5), a yarn spreading and glue-extruding device (6), a post-tensioning device (7), a yarn nozzle (8), and a core mold (9).

8. A post-tensioned high-tension continuous fiber wet winding device according to claim 7, characterized in that, The dip tank device is equipped with a heating device, and the dip roller has a diameter of 100-200 mm.

9. A post-tensioned high-tension continuous fiber wet winding device according to claim 7, characterized in that, The yarn spreading and glue-extruding device 6 consists of a reciprocating motor (6-4), a transmission frame (6-3), fixed guide rollers 6 (6-6), 7 (6-7), 8 (6-8), and moving guide rollers 1 (6-1) and 2 (6-2). The reciprocating motor drives the transmission frame (6-3) to move through a hinge connection. The moving guide rollers 1 (6-1) and 2 (6-2) perform cyclical motion within a certain trajectory to promote fiber spreading and glue impregnation. The moving guide roller is a concave-convex roller with an inner-outer diameter difference of 1-5 mm.

10. A post-tensioned high-tension continuous fiber wet winding device according to claim 7, characterized in that, The rear high tension device consists of a fixed guide roller 9 (7-9), a fixed guide roller 10 (7-10), and a moving guide roller 3 (7-3) connected to a magnetic powder coupler (7-1). The input current of the magnetic powder coupler is 0-4A.

11. A post-tensioned high-tension continuous fiber wet winding device according to claim 7, characterized in that, All guide rollers in the winding process device are made of materials including polytetrafluoroethylene, stainless steel, cast iron, and ceramic, with a diameter of 30-100 mm, and all surfaces are polished.

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