CN115156095B - Infrared detection device and method for thermoplastic prepreg for high tension winding molding - Google Patents

Abstract

The invention discloses an infrared detection device and method for thermoplastic prepreg for high-tension winding molding, belonging to the field of composite material detection, wherein the device comprises a discharging device, a receiving device, a limiting device, a guiding device, a heating device, an infrared detection device and prepreg, which are fixed on a mounting frame; the prepreg is discharged by the discharging device, sequentially passes through the limiting device, the guiding device, the heating device and the infrared detection device, and finally enters the receiving device. The invention establishes a direct relation between the infrared detection result and the allowable winding tension of the thermoplastic prepreg, and improves the detection efficiency; the thermoplastic prepreg is used in a grading manner according to the detection result, so that the material waste is reduced; according to the high rigidity characteristic and the high tension molding low damage tolerance characteristic of the thermoplastic prepreg, the detection limiting and guiding device is reasonably designed, so that the damage to the thermoplastic prepreg during detection is avoided.

Description

Infrared detection device and method for thermoplastic prepreg for high tension winding molding

technical field

The patent of the present invention belongs to the technical field of composite material detection, and relates to an infrared detection device and method for composite material prepregs, in particular to an infrared detection device and method for thermoplastic prepregs for high-tension winding molding.

Background technique

The resin in the thermoplastic composite prepreg is in a fully consolidated state, which can effectively transmit the load, and can achieve high-tension winding molding up to 1000MPa, which is an order of magnitude higher than the 100MPa-level conventional tension winding using thermosetting composite materials. It is suitable for Energy storage flywheels, high-speed motor rotor sheaths, electromagnetic launch tubes and other advanced electromagnetic field high-tension winding parts are formed. However, high-performance thermoplastic prepregs have technical difficulties such as difficult impregnation and ply plying, which lead to defects in prepregs, and for wide-width prepregs, they need to be cut and used, which is easy to cause prepregs during cutting. damage. High-tension winding is a special molding method, which is different from conventional molding methods. High-tension winding needs to exert greater stress on the prepreg during the molding process and is accompanied by a higher molding temperature. The strength and uniformity requirements are extremely high, and it is extremely sensitive to material defects and damage. According to the design requirements, the non-damage thermoplastic prepreg can stably achieve high tension winding of 1000-1500MPa. Prepreg defects and damage will lead to a decrease in the allowable winding tension of the prepreg, and the prepreg containing defects or damage will be damaged when the tension is lower than 1000MPa, and the fluctuation of this damage is large and random Obviously, it seriously affects the continuity and practicability of high-tension winding molding, and restricts the use of high-tension winding technology for thermoplastic prepregs. There is an urgent need for targeted detection devices and methods.

The existing infrared detection methods are mainly to detect the properties of the formed material, or to detect the thermosetting prepreg. The existing infrared detection method does not establish the relationship between the detection parameters and the allowable winding tension of the material in the high-tension winding molding, and lacks a direct evaluation of the allowable winding tension of the prepreg winding, resulting in many existing detection steps and long time ,low efficiency. Moreover, the existing detection methods cannot be used to grade and use prepregs for tension winding, which may easily cause waste of prepregs. The existing detection device does not take into account the key issues of high rigidity of thermoplastic prepreg and high tension winding is sensitive to the damage of prepreg. Suitable for testing thermoplastic prepregs for high tension winding. In order to meet the demand for high-tension winding of thermoplastic prepregs, there is an urgent need for a special infrared detection device and its use method, which can judge the allowable winding tension of prepregs directly, accurately and with low damage, and realize the graded use of prepregs. Development of high tension winding technology for thermoplastic prepregs.

Contents of the invention

The purpose of the present invention is to solve the problems mentioned in the background technology, and provide an infrared detection device and method for thermoplastic prepregs for high-tension winding molding.

For realizing above-mentioned technical purpose, the technical scheme that the present invention takes is:

An infrared detection device for thermoplastic prepregs for high-tension winding molding, which is characterized by: including a mounting frame, a feeding device, a receiving device, a limit device, a guiding device, a heating device, an infrared detection device and a prepreg; wherein, The unwinding device, receiving device, limit device, guiding device, heating device, and infrared detection device are all fixed on the mounting frame. The unloading device is used to release the prepreg, and the limit device is used to restrict the position of the prepreg. The device is used to recover and constrain the prepreg. After the prepreg passes through the discharging device and the limiting device in turn, it is recovered by the receiving device. The guiding device is used to guide the prepreg between the limiting device and the receiving device to the heating device. Between the heating device and the infrared detection device, the heating device is used to heat the lower surface of the prepreg, and the infrared detection device is used to detect the temperature of the heating device and the temperature of the upper surface of the prepreg.

In some of these embodiments, the limit device includes multiple groups of inclined rollers, the rollers are fixed on the mounting frame through the roller mounting seat, and the rollers constrain the position of the prepreg through the lateral component force and friction of the inclined surface. The thickness of the prepreg is h, the width is d, the material modulus is E, the tensile strength is δ, the maximum inclination angle between the passing rollers is θ, the distance L between the passing rollers is greater than E*d/(0.1*δ); the diameter of the passing rollers is D Greater than E*h/(0.1*δ).

In some of these embodiments, the heating device is composed of a heating roller, a heating roller mounting shaft, a heat source, a heat source mounting base, and a temperature control device. The heating roller is installed on the mounting frame through the heating roller mounting shaft, and the heat source and the temperature control device are installed on The heat source mounting seat is connected to the mounting frame, the heat source is used to heat up the heating roller, and the temperature control device controls the temperature of the heating roller by controlling the heat input of the heat source.

In some of these embodiments, the heat source is a heat gun or a heating rod or an induction coil.

In some of the embodiments, the infrared detection device is composed of an infrared thermometer, a fixed frame of the infrared thermometer, a slide mechanism and a follow-up window, and the infrared thermometer is fixed on the mounting frame through the fixed frame of the infrared thermometer. The follow-up window is installed on the slide mechanism through the slide rail, and the slide mechanism is fixed on the mounting frame. The follow-up window is composed of a window box, a front roller clamp, and a rear roller clamp. The top of the window box is opened with a prepreg material. The window with the same width, the window and the heating roller are located between the front roller nip and the rear roller nip, and the heating roller is located below the window, the prepreg passes through the front roller nip and the rear roller nip, and is passed by the front roller nip The clamp and the rear pair of roller clamps are respectively clamped, and the lower surface of the prepreg is attached to the heating roller. The infrared thermometer can detect the temperature of the heating roller and the temperature of the upper surface of the prepreg through the window.

In some of these embodiments, the discharging device is composed of a discharging cylinder, a discharging shaft and a damper. The front end of the prepreg is wound on the discharging cylinder, and the discharging cylinder is fixed on the discharging shaft. The damper is connected with the mounting frame, and the damper can provide a resistance of not less than 0.01Nm at the speed of 1-100 RPM of the discharge shaft; the damper is a mechanical friction belt or a motor or a magnetic powder brake.

In some of the embodiments, the receiving device is composed of a receiving tray, a receiving shaft, a receiving motor and a motor mounting seat, the receiving tray is fixed on the receiving shaft, and the receiving shaft is connected to the receiving motor through transmission. The material motor is fixedly installed on the motor mounting base, the motor mounting base is fixed on the mounting frame, the rear end of the prepreg is rolled on the receiving tray, and the receiving motor drives the receiving tray to rotate through the receiving shaft, providing a force of not less than 10N. Rewind tension to maintain the tightening and orientation of the prepreg.

In some of these embodiments, the guiding device is composed of at least two parallel guiding rollers, and at least one guiding roller is respectively arranged on the front side and the rear side of the heating roller, and the diameter D of the guiding roller is greater than E*h/(0.1*δ) .

In some of these embodiments, the front pair of roller clamps is composed of a first metal roller, a first rubber roller, a first movable mounting bracket and a first spring, the first metal roller and the first rubber roller are arranged in parallel, and one end of the first spring is It is connected to the window box, and the other end is connected to the first rubber roller. The first spring pulls the first rubber roller to the first metal roller through elastic force, so that the first rubber roller and the first metal roller are in close contact. Pass between the metal roller and the first rubber roller; the rear pair of roller clamps is composed of the second metal roller, the second rubber roller, the second movable mounting frame and the second spring, the second metal roller and the second rubber roller are arranged in parallel, One end of the second spring is connected to the window box, and the other end is connected to the second rubber roller. The second spring pulls the second rubber roller to the second metal roller through elastic force, so that the second rubber roller and the second metal roller are in close contact, prepreg The material passes between the second rubber roller and the second metal roller.

A detection method of an infrared detection device for thermoplastic prepregs for high-tension winding molding, comprising the following steps:

Step 1: For the same batch of prepregs of the same material, record the surface temperature T1 of the heating roller, the average temperature T2 of the upper surface of the inspected prepreg, the highest temperature Tmax of the upper surface of the inspected prepreg, and the lowest temperature of the upper surface of the prepreg Tmin, meter temperature fluctuation coefficient x2=(Tmax-Tmin)/T2;

Step 2. Calibrate and measure the infrared characteristics of a tube of prepreg to obtain the average temperature T2 of its upper surface;

Take several sections of the section with temperature fluctuation coefficient x2<10%, and test its tensile strength, and record the tensile force at the time of average tensile failure as N1; take several sections with temperature fluctuation coefficient of 10%<x2<20%, Test its tensile strength to obtain its tensile strength as N1*k1, and k1 is the first strength reduction coefficient; take several sections of the part with a temperature fluctuation coefficient of 20%<x2<30%, test its tensile strength, and obtain its tensile strength The tensile strength is N1*k2, and k2 is the second strength reduction factor;

Step 3: Rating and use, the temperature fluctuation coefficient x2<10%, the final winding tension is N1*k0, k0 is the tension winding process coefficient, which depends on the quality of thermoplastic prepreg, and the temperature fluctuation coefficient is 10% For degraded use, the allowable winding tension is N1*k1*k0; if the temperature fluctuation coefficient is 20%<x2<30%, it is degraded for use, and the allowable winding tension is N1*k2*k0; the temperature fluctuation coefficient x2>30%, prepreg The quality cannot meet the needs of large tension winding.

The present invention has the following advantages:

The beneficial effects of the present invention are:

1. Established the direct relationship between the infrared detection results of thermoplastic prepregs and the allowable winding tension of thermoplastic prepregs, which improved the detection efficiency;

2. Classify and evaluate thermoplastic prepreg according to the infrared detection results of thermoplastic prepreg, and realize the graded use of thermoplastic prepreg according to design requirements, reducing material waste;

3. Considering the high rigidity and easy damage characteristics of the thermoplastic prepreg body, as well as the high requirements for the quality of the prepreg by large-tension winding, through the design of a reasonable guide and limit device, the prepreg is avoided during the inspection process. damage;

4. A secondary heating device is used to stabilize the temperature of the heat source, and it can be adjusted according to the needs of different materials. The overall device is simple and practical, and does not require high software and hardware conditions. Only the infrared thermometer and its own software are used, and no complicated post-processing is required. process.

Description of drawings

Fig. 1 is the general schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the discharging device;

Fig. 3 is a schematic diagram of a limiting device;

Fig. 4 is a schematic diagram of a heating device;

Fig. 5 is a schematic diagram of an infrared detection device;

FIG. 6 is a schematic diagram of a follow-up window.

Marking names in the picture: 1. Mounting frame, 2. Unwinding device, 3. Receiving device, 4. Limiting device, 5. Guide device, 6. Heating device, 7. Infrared detection device, 8. Prepreg, 21. Unwinding barrel, 22. Unwinding shaft, 23. Damper, 31. Receiving pan, 32. Receiving shaft, 33. Receiving motor, 34. Motor mount, 41. Roller, 42. Roller Mounting seat, 411. The first roller, 412. The second roller, 413. The third roller, 414. The fourth roller, 423. The third roller mounting seat, 424. The fourth roller mounting seat, 51 .Guide roller, 61. Heating roller, 62. Heating roller mounting shaft, 63. Heat source, 64. Heat source mounting seat, 65. Temperature control device, 71. Infrared thermometer, 72. Infrared thermometer fixing frame, 73. Sliding table mechanism, 74. Follow-up window, 731. Slide rail, 741. Window box, 7421 The first metal roller, 7422. The first rubber roller, 7423. The first movable mounting frame, 7424. The first spring, 743. Rear Roller clamp, 7431. Second metal roller, 7432. Second rubber roller, 7433. Second movable mounting frame, 7434. Second spring.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

It should be noted that terms such as "upper", "lower", "left", "right", "front", and "rear" quoted in the invention are only for clarity of description, not for Limiting the practicable scope of the present invention, and the change or adjustment of the relative relationship shall also be regarded as the practicable scope of the present invention without substantive changes in the technical content.

As shown in Figures 1-6, the infrared detection device and method for thermoplastic prepregs for high-tension winding molding of the present invention include a mounting frame 1, a feeding device 2, a receiving device 3, a limiting device 4, and a guiding device 5. A heating device 6 , an infrared detection device 7 and a prepreg 8 . Wherein, the discharging device 2, the receiving device 3, the limit device 4, the guiding device 5, the heating device 6, and the infrared detection device 7 are all fixed on the mounting frame 1, and the discharging device 2 is composed of a discharging cylinder 21 and a discharging shaft 22. , damper 23, the material receiving device 3 is composed of a material receiving tray 31, a material receiving shaft 32, a material receiving motor 33, and a motor mounting seat 34, and the limit device 4 is composed of multiple sets of inclined rollers 41 and roller mounting seats 42 , the guide device 5 is made up of at least two parallel guide rollers 51, the heating device 6 is made up of a heating roller 61, a heating roller installation shaft 62, a heat source 63, a heat source mounting seat 64, and a temperature control device 65, and the infrared detection device 7 is composed of an infrared measurement Composed of a thermometer 71, an infrared thermometer fixing frame 72, a slide mechanism 73, and a follow-up window 74, the prepreg 8 is released from the discharge device 2, and then passes through the limit device 4, the guide device 5, the heating device 6, the infrared The detection device 7 finally enters the receiving device 3 .

Use the following infrared detection and classification methods for thermoplastic prepregs for tension winding molding:

Step 1: For the same batch of prepregs 8 of the same material, record the surface temperature T1 of the heating roller 61, the average temperature T2 of the upper surface of the prepreg 8 inspected, the maximum temperature Tmax of the upper surface of the prepreg 8 inspected, and the temperature Tmax of the prepreg 8 inspected. 8 The minimum temperature Tmin on the upper surface, the temperature fluctuation coefficient x2=(Tmax-Tmin)/T2.

Step 2: Calibration

Measure the infrared characteristics of a tube of prepreg 8 to obtain the average temperature T2 of its upper surface;

Take several sections of the section where the temperature fluctuation coefficient x2<10% and test its tensile strength, and record the tensile force at the time of average tensile failure as N1;

Take a number of sections with a temperature fluctuation coefficient of 10%<x2<20%, test their tensile strength, and obtain their tensile strength as N1*k1, where k1 is the first strength reduction coefficient;

Take several sections of the part with a temperature fluctuation coefficient of 20%<x2<30%, test its tensile strength, and obtain its tensile strength as N1*k2, where k2 is the second strength reduction coefficient;

Step Three: Rating Use

If the temperature fluctuation coefficient x2<10%, the final winding tension is N1*k0, and k0 is the tension winding process coefficient, which depends on the quality of the thermoplastic prepreg. According to the previous experiments, the carbon fiber reinforced PEEK material (T700/PEEK) is 0.45, Glass fiber reinforced PEEK material (S2/PEEK) takes 0.3;

If the temperature fluctuation coefficient is 10%<x2<20%, it will be degraded and used, and the allowable winding tension is N1*k1*k0;

If the temperature fluctuation coefficient is 20%<x2<30%, it will be degraded and used, and the allowable winding tension is N1*k2*k0;

The temperature fluctuation coefficient x2>30%, according to the previous experiments, the quality of this prepreg fluctuates greatly, and there are many defects, which cannot meet the needs of high tension winding, and can be used in other molding methods.

The limit device 4 is composed of multiple sets of inclined rollers 41 and roller mounting seats 42, which limit the position of the prepreg 8 to facilitate infrared testing. Tension winding molding is extremely sensitive to material damage. In order to avoid damage caused by testing, multiple sets of The obliquely placed straight hard roller 41 is used as a limit roller, and the position of the prepreg 8 is constrained by the lateral force and friction of the inclined surface. The material with a hardness higher than HRC50 is used to make the roller 41 to prevent the deformation of the prepreg 8 due to the roller surface. resulting in damage. And in order to prevent the prepreg 8 from being damaged due to the additional bending moment brought by the inclined passing roller 41, it is necessary to design the position and size of the passing roller 41 in the limit device 4, and record the thickness of the prepreg 8 is h, the width is d, the maximum inclination angle between the passing rollers 41 is θ, the material modulus is E, and the tensile strength is δ, the distance L between the passing rollers 41 needs to be greater than E*d/(0.1*δ); in order to prevent the prepreg The additional bending moment caused by 8 on the surface of the passing roller 41 causes damage to the prepreg 8, and the diameter D of the passing roller 41 needs to be greater than E*h/(0.1*δ). The heating device 6 is composed of a heating roller 61, a heating roller installation shaft 62, a heat source 63, a heat source mounting seat 64, a temperature control device 65, etc., the heating roller 61 is installed on the mounting frame 1 through the heating roller installation shaft 62, and the heat source 63 and temperature control The device 65 is installed on the heat source mounting base 64 and connected to the mounting frame 1. The heat source 63 is used to raise the temperature of the heating roller 61. The temperature control device 65 collects and controls the heat input of the heat source 63 to control the temperature of the heating roller 61. The heating roller 61 is made of metal material with high temperature resistance and high specific heat. Using two-stage heating makes it easier to provide stable heat input for prepreg 8 testing. The discharge device 2 is composed of a discharge cylinder 21, a discharge shaft 22, and a damper 23. The damper 23 can be a mechanical friction belt, a motor, a magnetic powder brake, etc. The damper 23 can be stable for a long time at a speed of 1-100 RPM. Provide a resistance of not less than 0.01Nm. The receiving device 3 is composed of a receiving tray 31, a receiving shaft 32, a receiving motor 33, and a motor mounting base 34. The receiving motor 33 can stably provide a receiving tension of not less than 10N to maintain the receiving tension of the prepreg 8. tight with orientation. The guide device 5 is composed of at least two parallel guide rollers 51. The material with a hardness higher than HRC50 is used as the roller surface material. In order to prevent the additional material 8 from being damaged by the prepreg 8 on the surface of the guide roller 51, the diameter of the guide roller 51 is It needs to be greater than E*h/(0.1*δ). The heat source 63 can be a heat gun, a heating rod, an induction coil, and the like. The roller clamp 742 is composed of a metal roller 7421, a rubber roller 7422, a movable mounting frame 7423, and a spring 7424. The spring 7424, the rubber roller 7422, and the metal roller 7421 are used to clamp the prepreg 8. Multiple groups of inclined rollers 41 and roller mounts 42 can be divided into first rollers 411, first roller mounts 421, second rollers 412, second roller mounts 422, third rollers 413, The third passing roller mounting seat 423 , the fourth passing roller 414 , and the fourth passing roller mounting seat 424 . The guide roller 51 can be divided into a first guide roller 511 and a second guide roller 512 .

The above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (9)

1. The detection method of the infrared detection device of the thermoplastic prepreg for the high-tension winding molding is characterized by comprising the following steps of: the method comprises the following steps:

step one: for prepregs (8) of the same batch and the same material, recording the surface temperature T1 of a heating roller (61), the average surface temperature T2 of the detected prepregs (8), the highest surface temperature Tmax of the detected prepregs (8), the lowest surface temperature Tmin of the prepregs (8), and the temperature fluctuation coefficient x2 = (Tmax-Tmin)/T2;

step two, calibrating and measuring the infrared characteristics of the prepreg (8) to obtain the average temperature T2 of the upper surface of the prepreg;

taking a part with a temperature fluctuation coefficient x2 of less than 10% from the sections, testing the tensile strength of the sections, and recording the tensile force of the sections as N1 when the sections are subjected to average tensile failure; taking a plurality of sections of a part with a temperature fluctuation coefficient of 10% < x2<20%, and testing the tensile strength to obtain a tensile strength N1 x k1, wherein k1 is a first strength reduction coefficient; taking a plurality of sections of a part with a temperature fluctuation coefficient of 20% < x2<30%, and testing the tensile strength to obtain a tensile strength N1 x k2, wherein k2 is a second strength reduction coefficient;

step three: for rating, the final winding tension is N1 x k0 when the temperature fluctuation coefficient x2 is less than 10%, k0 is the tension winding process coefficient, and the temperature fluctuation coefficient is 10% < x2<20% and is degraded according to the quality of the thermoplastic prepreg, and the allowable winding tension is N1 x k0; the temperature fluctuation coefficient is 20% < x2<30%, and the allowable winding tension is N1 x k2 x k0; the temperature fluctuation coefficient x2 is more than 30 percent, the quality of the prepreg can not meet the requirement of large tension winding,

the method is realized by using an infrared detection device of the thermoplastic prepreg for the high-tension winding forming, and the infrared detection device of the thermoplastic prepreg for the high-tension winding forming comprises a mounting frame (1), a discharging device (2), a receiving device (3), a limiting device (4), a guiding device (5), a heating device (6), an infrared detection device (7) and a prepreg (8); wherein, blowing device (2), receiving device (3), stop device (4), guider (5), heating device (6), infrared detection device (7) all are fixed in mounting bracket (1), blowing device (2) are used for letting out prepreg (8), stop device (4) are used for retraining prepreg (8) position, receiving device (3) are used for retrieving retraining prepreg (8), prepreg (8) are retrieved by receiving device (3) behind blowing device (2), stop device (4) in proper order, guider (5) are used for with between heating device (6) and infrared detection device (7) with prepreg (8) between stop device (4) and receiving device (3), heating device (6) are used for heating prepreg (8) lower surface, infrared detection device (7) are used for detecting heating device (6) temperature and prepreg (8) upper surface temperature.

2. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 1, wherein: the limiting device (4) comprises a plurality of groups of inclined passing rollers (41), the passing rollers (41) are fixed on the mounting frame (1) through passing roller mounting seats (42), the passing rollers (41) restrict the positions of the prepregs (8) through inclined plane lateral component force and friction force, the thickness of the prepregs (8) is recorded as h, the width of the prepregs is recorded as d, the modulus of materials is E, the tensile strength is delta, the maximum inclination angle among the passing rollers (41) is theta, and the spacing L between the passing rollers (41) is larger than E x d/(0.1 x delta); the diameter D of the roller (41) is greater than E.times.h/(0.1.times.delta.).

3. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 2, wherein: the heating device (6) consists of a heating roller (61), a heating roller mounting shaft (62), a heat source (63), a heat source mounting seat (64) and a temperature control device (65), wherein the heating roller (61) is mounted on the mounting frame (1) through the heating roller mounting shaft (62), the heat source (63) and the temperature control device (65) are mounted on the heat source mounting seat (64), the heat source mounting seat (64) is connected to the mounting frame (1), the heat source (63) is used for heating the heating roller (61), and the temperature control device (65) controls the temperature of the heating roller (61) by controlling the heat input of the heat source (63).

4. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 3, wherein: the heat source (63) is a heat gun or a heating rod or an induction coil.

5. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 4, wherein: the infrared detection device (7) comprises an infrared thermometer (71), an infrared thermometer fixing frame (72), a sliding table mechanism (73) and a follow-up window (74), wherein the infrared thermometer (71) is fixed on the mounting frame (1) through the infrared thermometer fixing frame (72), the follow-up window (74) is arranged on the sliding table mechanism (73) in a sliding mode through a sliding rail (731), the sliding table mechanism (73) is fixed on the mounting frame (1), the follow-up window (74) is composed of a window box (741), a front counter roller clamp (742) and a rear counter roller clamp (743), the top of the window box (741) is provided with a window with the same width as a prepreg (8), the window and a heating roller (61) are both positioned between the front counter roller clamp (742) and the rear counter roller clamp (743), the prepreg (8) passes through the front counter roller clamp (742) and the rear counter roller clamp (743) and is respectively clamped by the front counter roller clamp (742) and the rear counter roller clamp (743), and the prepreg (8) can be adhered to the surface of the prepreg (8) through the heating roller (743), and the surface of the prepreg (8) can be heated, and the temperature of the prepreg (61) can be detected.

6. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 5, wherein: the discharging device (2) consists of a discharging cylinder (21), a discharging shaft (22) and a damper (23), wherein the front end of the prepreg (8) is wound on the discharging cylinder (21), the discharging cylinder (21) is fixed on the discharging shaft (22), the discharging shaft (22) is connected with the mounting frame (1) through the damper (23), and the damper (23) can provide resistance of not less than 0.01Nm at the rotating speed of the discharging shaft (22) of 1-100 RPM; the damper (23) is a mechanical friction belt or a motor or a magnetic powder brake.

7. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 6, wherein: the material collecting device (3) comprises a material collecting disc (31), a material collecting shaft (32), a material collecting motor (33) and a motor mounting seat (34), wherein the material collecting disc (31) is fixed on the material collecting shaft (32), the material collecting shaft (32) is in transmission connection with the material collecting motor (33), the material collecting motor (33) is fixedly mounted on the motor mounting seat (34), the motor mounting seat (34) is fixed on the mounting frame (1), the rear end of the prepreg (8) is wound on the material collecting disc (31), and the material collecting motor (33) drives the material collecting disc (31) to rotate through the material collecting shaft (32) to provide material collecting tension of not less than 10N, so that the tightening and the orientation of the prepreg (8) are maintained.

8. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 7, wherein: the guide device (5) consists of at least two parallel guide rollers (51), and at least one guide roller (51) is arranged at the front side and the rear side of the heating roller (61), wherein the diameter D of the guide roller (51) is larger than E/(0.1 x delta).

9. The method for detecting an infrared detecting device for a thermoplastic prepreg for high-tension winding molding according to claim 8, wherein: the front pair of roller clamps (742) are composed of a first metal roller (7421), a first rubber roller (7422), a first movable mounting frame (7423) and a first spring (7424), wherein the first metal roller (7421) and the first rubber roller (7422) are arranged in parallel, one end of the first spring (7424) is connected with the window box (741), the other end of the first spring is connected with the first rubber roller (7422), the first spring (7424) pulls the first rubber roller (7422) to the first metal roller (7421) through elasticity, the first rubber roller (7422) is clung to the first metal roller (7421), and the prepreg (8) passes through the space between the first metal roller (7421) and the first rubber roller (7422); the rear pair roller clamp (743) is composed of a second metal roller (7431), a second rubber roller (7432), a second movable mounting frame (7433) and a second spring (7434), wherein the second metal roller (7431) and the second rubber roller (7432) are arranged in parallel, one end of the second spring (7434) is connected with a window box (741), the other end of the second spring is connected with the second rubber roller (7432), the second spring (7434) pulls the second rubber roller (7432) to the second metal roller (7431) through elasticity, the second rubber roller (7432) is clung to the second metal roller (7431), and the prepreg (8) passes through the gap between the second rubber roller (7432) and the second metal roller (7431).