CN108749042B - A kind of pultrusion production method and equipment of fiber reinforced composite material curved profile - Google Patents

Abstract

The invention relates to a pultrusion production method and equipment for a fiber reinforced composite material bent section, wherein the production method comprises the working procedures of yarn feeding, fiber arrangement, gum dipping, preforming, curing and forming, traction and cutting; the equipment for realizing the pultrusion production method comprises a creel, a fiber arrangement plate, a guide roller, a resin glue groove, a preforming die, a curing die, a first bending traction device, a second bending traction device, a cutting device and a rack; after the yarn is preliminarily heated, extruded and solidified and molded in a curing mold, the yarn is pulled out of the mold by a bending traction device, moves along a circular curve track, and is cut into a bent section after reaching a proper length. The method is simple and clear, has simple and easy production tools, and is suitable for pultrusion production of curved profiles with different radiuses.

Description

A kind of pultrusion production method and equipment of fiber reinforced composite material curved profile

technical field

The invention relates to a pultrusion production method and equipment for fiber-reinforced composite material curved profiles, belonging to the field of fiber-reinforced composite material structures.

Background technique

The pultrusion process is a method of continuous production of fiber reinforced composite material profiles, which is to impregnate the untwisted fiber rovings or other continuous reinforcement materials, polyester surface felts, etc. , and make it in the mold to be cured and formed continuously after the mold is released, thereby forming an automatic production process of pultruded products. The advantages of pultrusion are: the production process is fully automated and controlled, the production efficiency is high, the dipping is carried out under tension, which can give full play to the role of reinforcing materials, the product has high strength, and there is no leftover material in the production process. As a low-cost, high-quality molding process for the production of composite materials, it is especially suitable for the production of continuous, fixed-section composite materials. The disadvantage is that the mold manufacturing requirements are high, the fiber and resin content cannot be accurately controlled, and there are certain requirements for the properties of the pultrusion resin (fast curing).

SUMMARY OF THE INVENTION

Technical problem: The purpose of the present invention is to provide a method and equipment for pultrusion production of fiber-reinforced composite curved profiles, which is concise and clear, with simple equipment, and can be applied to the production of curved profiles with different radii.

Technical solution: The present invention provides a pultrusion production equipment for fiber reinforced composite curved profiles, which includes creel, fiber arrangement plate, guide roller, resin glue tank, preforming mold, curing mold, traction device, cutting The device and the frame; the creel, the fiber arrangement board and the resin glue tank are arranged in sequence at the front end of the pre-forming mold, the outlet of the resin glue tank is connected with the inlet end of the pre-forming mold, and the guide roller (3) is placed on the resin The front and rear ends of the tank top of the glue tank (4) and the middle position of the bottom of the tank; the outlet end of the preforming mold is communicated with the inlet end of the curing mold, and a traction device is provided outside the outlet end of the curing mold, and a cutting device is provided behind the traction device. The device, curing mold and cutting device are fixed on the frame.

in:

The curing mold is a linear mold or a curved mold; when producing a solid curved profile, the curing mold has only an outer mold, and when producing a hollow curved profile, the curing mold is composed of an outer mold and a mold core.

When the curing mold is a curved mold, in the process of producing solid curved profiles, the radius of curvature of the inner wall of the outer mold is the same as the radius of curvature of the outer wall of the solid curved profiles; in the process of producing hollow curved profiles, the curvature of the inner wall of the outer mold of the curing mold is the same. The radius is the same as the radius of curvature of the outer wall of the hollow curved profile, and the radius of curvature of the outer wall of the mold core is the same as the radius of curvature of the inner wall of the hollow curved profile.

The traction device includes a first curved traction device and a second curved traction device, both of which are composed of a collet and a rotating arm for fixing the collet; the collet is composed of a vertical guide rail and an upper parallel fixed on the vertical guide rail. The splint and the lower splint are composed. One end of the swivel arm is fixedly connected to the vertical guide rail, and the other end of the swivel arm is connected to the fixing rod fixed on the frame. The same; the side of the jib is connected to one end of the jack through the connecting piece, the connecting piece and the jib make a relative linear motion along the length of the jib, and the connecting piece and the jack rotate with each other; the other end of the jack is fixed with the fixed plate, The fixing plate is fixed to the frame to prevent the jack from sliding;

The side of the arm is connected with one end of the jack through a connecting piece. Specifically, a chute is set on the side of the arm, and there is a slider in the chute. The slider is connected with the jack through the slot hole through a hinge. The hinge and the slider make the swing arm rotate around the fixed rod, and the chuck moves along the curved track with the profile under the drive of the swing arm. sports.

Both the upper splint and the lower splint slide up and down along the vertical guide rail to clamp the profile.

The other end of the rotating arm is connected with the fixing rod, which means that the other end of the rotating arm is sleeved on the fixing rod through a ring.

A spring is installed between the said arm and the fixed plate. When the arm is not rotating, the spring is in the initial state. When the jack pushes the arm to rotate, the spring begins to deform. After moving to the farthest distance, the oil return of the jack is no longer applied. Pushing force, the spring begins to retract, driving the arm back to the initial state.

What is said is that the other end of the arm is sleeved on the fixed rod through a ring, and a torsion spring is installed in the ring. When the arm is not rotating, the torsion spring is in the initial state. When the jack pushes the arm to rotate, the torsion spring begins to rotate. Deformation, after moving to the farthest distance, the jack returns the oil and no longer exerts the thrust force, and the torsion spring begins to gradually restore the initial state, driving the arm back to the initial position.

The arms of the first curved traction device and the second curved traction device are arranged staggered up and down, and the length of the arms is adapted to the radius of curvature of the curved profile.

According to the different section shape and curvature radius of the designed curved profile, adjust the section shape and curvature radius of the curing die, and adjust the length of the arm, which can be applied to the pultrusion production of different curved profiles.

The present invention also provides a method for producing the curved profile by utilizing the above-mentioned pultrusion production equipment for the curved profile of the fiber-reinforced composite material. The steps are as follows:

1) Control the yarn creel to release the yarn, and control the yarn release speed. After the yarn is bundled by the fiber arrangement board, it is dipped into the resin glue tank through the guide roller for dipping;

2) After dipping, enter the pre-forming mold, remove excess resin and air bubbles, then enter the curing mold, and form a curved profile by heating and extrusion;

3) The curved profile is pulled out along the curved track by the first traction device. When it is pulled to the second traction device, the second traction device clamps the profile, the first traction device is released, and the second traction device continues along the curved track. Pull out, while the first pulling device moves back, when the first pulling device is retracted to the exit of the curing mold, the second pulling device is pulled to the farthest distance, the first pulling device clamps the profile at the outlet, and continues to pull out. The second traction device loosens the profile and moves back until it reaches the initial position, butts with the first traction device, and repeats the previous process. After reciprocating for a certain length, it is cut by the cutting device to form a curved profile.

Beneficial effect: Compared with the prior art, the present invention has the following advantages:

1) The method is concise and clear, the equipment is simple and easy to operate, and it can be used directly by modifying the equipment of the original linear profile;

2) It can be applied to the production of curved profiles with different curvature radii;

3) The movement track of the traction device is clear and easy to control.

Description of drawings

1 is a schematic diagram of a pultrusion production method and a complete set of equipment for curved profiles in Example 1;

Fig. 2 is the top view of curing mould in embodiment 1;

3 is a front view of a curing mold in Example 1;

4 is a schematic structural diagram of the bending traction device in Example 1;

5 is a schematic diagram of the hinged connection between the slider and the jack in the bending traction device in Embodiment 1;

Fig. 6 is the top view of the swing arm in the bending traction device in the embodiment 1;

Fig. 7 is the front view of the swing arm in the bending traction device in the embodiment 1;

FIG. 8 is a schematic diagram of the structure of the bending traction device in Example 2. FIG.

In the drawings: creel 1, fiber arrangement plate 2, guide roller 3, resin glue tank 4, pre-forming mold 5, curing mold 6, outer mold 6.1, mold core 6.2, first bending and pulling device 7, upper splint 7.1, vertical guide rail 7.2, lower splint 7.3, swing arm 7.4, chute 7.5, slider 7.6, hinge 7.7, jack 7.8, fixing plate 7.9, fixing rod 7.10, slot 7.11, second bending traction device 8, cutting device 9. Frame 10, curved profiles 11 and springs 12.

Detailed ways

Further description will be given below in conjunction with the accompanying drawings and embodiments.

Example 1

A pultrusion production equipment for fiber-reinforced composite curved profiles (as shown in Figure 1), the equipment includes a creel 1, a fiber arranging plate 2, a guide roller 3, a resin glue tank 4, a preforming mold 5, and a curing mold. 6. The traction device, the cutting device 9 and the frame 10; the creel 1, the fiber arrangement board 2 and the resin glue tank 4 are sequentially arranged at the front end of the pre-forming mold 5, and the outlet of the resin glue tank 4 is connected to the pre-forming mold. The inlet end of 5 is connected, and the guide roller 3 is placed in the middle position of the front and rear ends of the pool top and the pool bottom of the resin glue tank 4; A pulling device is arranged on the outside, and a cutting device 9 is arranged behind the pulling device. The curing mold 6 and the cutting device 9 are fixed on the frame 10 .

The traction device includes a first curved traction device 7 and a second curved traction device 8 (as shown in Figure 4, Figure 5, Figure 6, Figure 7), both of which are structured by a collet and a rotating arm that fixes the collet. 7.4 composition; the chuck is composed of vertical guide rail 7.2 and upper splint 7.1 and lower splint 7.3 fixed on the vertical guide rail 7.2 in parallel. The upper splint 7.1 and the lower splint 7.3 slide up and down along the vertical guide rail 7.2 to clamp the profiles; One end of the swivel arm 7.4 is fixedly connected with the vertical guide rail 7.2, and the other end of the swivel arm 7.4 is sleeved on the fixing rod 7.10 through a ring. The side of the swing arm 7.4 is provided with a chute 7.5, and there is a slider 7.6 in the chute. The slider 7.6 is connected with the jack 7.8 through the slot hole 7.11 through the hinge 7.7. The other end of the jack 7.8 is fixed to the fixed plate 7.9, and the fixed plate 7.9 is The frame 10 is fixedly connected, and the arms 7.4 of the first bending pulling device 7 and the second bending pulling device 8 are arranged staggered up and down.

The curing mold 6 (as shown in Figures 2 and 3) is a linear mold or a curved mold; when producing solid curved profiles, the curing mold 6 only has an outer mold 6.1. The mold 6.1 and the mold core 6.2 are composed; when the curing mold 6 is a curved mold, during the production of solid curved profiles, the radius of curvature of the inner wall of the outer mold 6.1 is the same as the radius of curvature of the outer wall of the solid curved profiles; in the process of producing hollow curved profiles, The radius of curvature of the inner wall of the outer mold 6.1 of the curing mold 6 is the same as the radius of curvature of the outer wall of the hollow curved profile, and the radius of curvature of the outer wall of the core 6.2 is the same as the radius of curvature of the inner wall of the hollow curved profile.

According to the different cross-sectional shape and curvature radius of the designed curved profiles 11, adjusting the cross-sectional shape and curvature radius of the curing mold 6 and adjusting the length of the arm 7.4 can be suitable for pultrusion production of different curved profiles 11.

A method for producing curved profiles by utilizing the above-mentioned pultrusion production equipment for curved profiles of fiber-reinforced composite materials, comprising the following steps: controlling the creel 1 to release yarns, and after the yarns are bundled by the fiber arranging plate 2, the yarns pass through guide rollers 3 Immerse in the resin glue tank 4 for dipping, and then enter the pre-forming mold 5 to remove excess resin and air bubbles, and then enter the curing mold 6 to form a curved profile 11 by heating and extrusion, and then pulled out by the first pulling device 7 along the curved track, When pulling to the second traction device 8, the second traction device 8 clamps the profile 11, the first traction device 7 is released, and the second traction device 8 continues to pull outward along the curved track, while the first traction device 7 moves toward the When the first pulling device 7 is retracted to the exit of the curing mold 6, the second pulling device 8 is pulled to the farthest distance, the first pulling device 7 clamps the profile 11 at the outlet, and continues to pull out, and the second pulling device 8 is loosened. Open the profile 11, move back to the initial position, butt with the first traction device 7, repeat the previous process, after reciprocating for a certain length, the cutting device 9 will cut to form a curved profile.

Example 2

A pultrusion production equipment for fiber-reinforced composite curved profiles (as shown in Figure 1), the equipment includes a creel 1, a fiber arranging plate 2, a guide roller 3, a resin glue tank 4, a preforming mold 5, and a curing mold. 6. The traction device, the cutting device 9 and the frame 10; the creel 1, the fiber arrangement board 2 and the resin glue tank 4 are sequentially arranged at the front end of the pre-forming mold 5, and the outlet of the resin glue tank 4 is connected to the pre-forming mold. The inlet end of 5 is connected, and the guide roller 3 is placed in the middle position of the front and rear ends of the pool top and the pool bottom of the resin glue tank 4; A pulling device is arranged on the outside, and a cutting device 9 is arranged behind the pulling device. The curing mold 6 and the cutting device 9 are fixed on the frame 10 .

The traction device includes a first curved traction device 7 and a second curved traction device 8 (as shown in Figure 4, Figure 5, Figure 6, Figure 7), both of which are structured by a collet and a rotating arm that fixes the collet. 7.4 composition; the chuck is composed of vertical guide rail 7.2 and upper splint 7.1 and lower splint 7.3 fixed on the vertical guide rail 7.2 in parallel. The upper splint 7.1 and the lower splint 7.3 slide up and down along the vertical guide rail 7.2 to clamp the profiles; One end of the swivel arm 7.4 is fixedly connected with the vertical guide rail 7.2, and the other end of the swivel arm 7.4 is sleeved on the fixing rod 7.10 through a ring. The side of the swing arm 7.4 is provided with a chute 7.5, and there is a slider 7.6 in the chute. The slider 7.6 is connected with the jack 7.8 through the slot hole 7.11 through the hinge 7.7. The other end of the jack 7.8 is fixed to the fixed plate 7.9, and the fixed plate 7.9 is The frame 10 is fixedly connected, and the arms 7.4 of the first bending traction device 7 and the second bending traction device 8 are staggered up and down; a spring 12 is installed between the fixed plate 7.9 and the arm 7.4 (as shown in FIG. 8 ) shown), the initial state of the spring is the state when the arm 7.4 is not rotated. When the jack 7.8 pushes the arm 7.4 to rotate, the spring begins to deform. Start to retract and drive the swivel arm 7.4 back to the initial state.

The curing mold 6 (as shown in Figures 2 and 3) is a linear mold or a curved mold; when producing solid curved profiles, the curing mold 6 only has an outer mold 6.1. The mold 6.1 and the mold core 6.2 are composed; when the curing mold 6 is a curved mold, during the production of solid curved profiles, the radius of curvature of the inner wall of the outer mold 6.1 is the same as the radius of curvature of the outer wall of the solid curved profiles; in the process of producing hollow curved profiles, The radius of curvature of the inner wall of the outer mold 6.1 of the curing mold 6 is the same as the radius of curvature of the outer wall of the hollow curved profile, and the radius of curvature of the outer wall of the core 6.2 is the same as the radius of curvature of the inner wall of the hollow curved profile.

According to the different cross-sectional shape and curvature radius of the designed curved profiles 11, adjusting the cross-sectional shape and curvature radius of the curing mold 6 and adjusting the length of the arm 7.4 can be suitable for pultrusion production of different curved profiles 11.

A method for producing curved profiles by utilizing the above-mentioned pultrusion production equipment for curved profiles of fiber-reinforced composite materials, comprising the following steps: controlling the creel 1 to release yarns, and after the yarns are bundled by the fiber arranging plate 2, the yarns pass through guide rollers 3 Immerse in the resin glue tank 4 for dipping, and then enter the pre-forming mold 5 to remove excess resin and air bubbles, and then enter the curing mold 6 to form a curved profile 11 by heating and extrusion, and then pulled out by the first pulling device 7 along the curved track, When pulling to the second traction device 8, the second traction device 8 clamps the profile 11, the first traction device 7 is released, and the second traction device 8 continues to pull outward along the curved track, while the first traction device 7 moves toward the When the first pulling device 7 is retracted to the exit of the curing mold 6, the second pulling device 8 is pulled to the farthest distance, the first pulling device 7 clamps the profile 11 at the outlet, and continues to pull out, and the second pulling device 8 is loosened. Open the profile 11, move back to the initial position, butt with the first traction device 7, repeat the previous process, after reciprocating for a certain length, the cutting device 9 will cut to form a curved profile.

Example 3

A pultrusion production equipment for fiber-reinforced composite curved profiles (as shown in Figure 1), the equipment includes a creel 1, a fiber arranging plate 2, a guide roller 3, a resin glue tank 4, a preforming mold 5, and a curing mold. 6. The traction device, the cutting device 9 and the frame 10; the creel 1, the fiber arrangement board 2 and the resin glue tank 4 are sequentially arranged at the front end of the pre-forming mold 5, and the outlet of the resin glue tank 4 is connected to the pre-forming mold. The inlet end of 5 is connected, and the guide roller 3 is placed in the middle position of the front and rear ends of the pool top and the pool bottom of the resin glue tank 4; A pulling device is arranged on the outside, and a cutting device 9 is arranged behind the pulling device. The curing mold 6 and the cutting device 9 are fixed on the frame 10 .

The traction device includes a first curved traction device 7 and a second curved traction device 8 (as shown in Figure 4, Figure 5, Figure 6, Figure 7), both of which are structured by a collet and a rotating arm that fixes the collet. 7.4 composition; the chuck is composed of vertical guide rail 7.2 and upper splint 7.1 and lower splint 7.3 fixed on the vertical guide rail 7.2 in parallel. The upper splint 7.1 and the lower splint 7.3 slide up and down along the vertical guide rail 7.2 to clamp the profiles; One end of the swivel arm 7.4 is fixedly connected with the vertical guide rail 7.2, and the other end of the swivel arm 7.4 is sleeved on the fixing rod 7.10 through a ring. The side of the swing arm 7.4 is provided with a chute 7.5, and there is a slider 7.6 in the chute. The slider 7.6 is connected with the jack 7.8 through the slot hole 7.11 through the hinge 7.7. The other end of the jack 7.8 is fixed to the fixed plate 7.9, and the fixed plate 7.9 is The frame 10 is fixedly connected, and the arms 7.4 of the first bending traction device 7 and the second bending traction device 8 are arranged in a staggered arrangement up and down; The initial state of the spring is the state when the arm 7.4 does not rotate. When the jack 7.8 pushes the arm 7.4 to rotate, the torsion spring begins to deform. After moving to the farthest distance, the jack 7.8 returns to the oil and no longer applies thrust, and the torsion spring starts Gradually restore the initial state, and drive the swivel arm 7.4 to return to the initial position.

The curing mold 6 (as shown in Figures 2 and 3) is a linear mold or a curved mold; when producing solid curved profiles, the curing mold 6 only has an outer mold 6.1. The mold 6.1 and the mold core 6.2 are composed; when the curing mold 6 is a curved mold, during the production of solid curved profiles, the radius of curvature of the inner wall of the outer mold 6.1 is the same as the radius of curvature of the outer wall of the solid curved profiles; in the process of producing hollow curved profiles, The radius of curvature of the inner wall of the outer mold 6.1 of the curing mold 6 is the same as the radius of curvature of the outer wall of the hollow curved profile, and the radius of curvature of the outer wall of the core 6.2 is the same as the radius of curvature of the inner wall of the hollow curved profile.

According to the different cross-sectional shape and curvature radius of the designed curved profiles 11, adjusting the cross-sectional shape and curvature radius of the curing mold 6 and adjusting the length of the arm 7.4 can be suitable for pultrusion production of different curved profiles 11.

A method for producing curved profiles by utilizing the above-mentioned pultrusion production equipment for curved profiles of fiber-reinforced composite materials, comprising the following steps: controlling the creel 1 to release yarns, and after the yarns are bundled by the fiber arranging plate 2, the yarns pass through guide rollers 3 Immerse in the resin glue tank 4 for dipping, and then enter the pre-forming mold 5 to remove excess resin and air bubbles, and then enter the curing mold 6 to form a curved profile 11 by heating and extrusion, and then pulled out by the first pulling device 7 along the curved track, When pulling to the second traction device 8, the second traction device 8 clamps the profile 11, the first traction device 7 is released, and the second traction device 8 continues to pull outward along the curved track, while the first traction device 7 moves toward the When the first pulling device 7 is retracted to the exit of the curing mold 6, the second pulling device 8 is pulled to the farthest distance, the first pulling device 7 clamps the profile 11 at the outlet, and continues to pull out, and the second pulling device 8 is loosened. Open the profile 11, move back to the initial position, butt with the first traction device 7, repeat the previous process, after reciprocating for a certain length, the cutting device 9 will cut to form a curved profile.

The above is only the preferred embodiment of the present invention, it should be pointed out that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides a pultrusion production device for fiber reinforced composite material curved profiles, which is characterized in that: the equipment comprises a creel (1), a fiber arrangement plate (2), a guide roll (3), a resin glue groove (4), a preforming mold (5), a curing mold (6), a traction device, a cutting device (9) and a frame (10); the creel (1), the fiber cloth arranging plate (2) and the resin glue groove (4) are sequentially arranged at the front end of the preforming mold (5), the outlet of the resin glue groove (4) is communicated with the inlet end of the preforming mold (5), and the guide roller (3) is arranged at the front end, the rear end and the middle position of the bottom of the pool of the resin glue groove (4); the outlet end of the preforming mold (5) is communicated with the inlet end of the curing mold (6), a traction device is arranged on the outer side of the outlet end of the curing mold (6), a cutting device (9) is arranged behind the traction device, the curing mold (6) and the cutting device (9) are fixed on a rack (10), the traction device comprises a first bending traction device (7) and a second bending traction device (8), and the structures of the first bending traction device and the second bending traction device are both composed of a chuck and a rotating arm (7.4) for fixing the chuck; the clamp head comprises a vertical guide rail (7.2), an upper clamping plate (7.1) and a lower clamping plate (7.3) which are fixed on the vertical guide rail (7.2) in parallel, one end of a spiral arm (7.4) is fixedly connected with the vertical guide rail (7.2), the other end of the spiral arm (7.4) is connected with a fixed rod (7.10) fixed on a rack (10), and the radius of the track of the spiral arm (7.4) rotating around the fixed rod (7.10) is the same as the radius of the central line of the bent profile (11); the side surface of the radial arm (7.4) is connected with one end of the jack through a connecting piece, the connecting piece and the radial arm (7.4) do relative linear motion along the length direction of the radial arm (7.4), and the connecting piece and the jack rotate mutually; the other end of the jack is fixedly connected with a fixed plate (7.9), and the fixed plate (7.9) is fixedly connected with the frame (10).

2. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: the curing mould (6) is a linear mould or a curved mould; when producing solid curved profiles, the curing mould (6) has only an outer mould (6.1), and when producing hollow curved profiles, the curing mould (6) consists of an outer mould (6.1) and a mould core (6.2).

3. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 2, characterized in that: when the curing mould (6) is a curved mould, the curvature radius of the inner wall of the outer mould (6.1) is the same as that of the outer wall of the solid curved section in the process of producing the solid curved section; in the process of producing the hollow curved section, the curvature radius of the inner wall of an outer die (6.1) of the curing die (6) is the same as that of the outer wall of the hollow curved section, and the curvature radius of the outer wall of a die core (6.2) is the same as that of the inner wall of the hollow curved section.

4. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: the side of spiral arm (7.4) links to each other through the connecting piece and the one end of jack, specifically is: the side surface of the rotary arm (7.4) is provided with a sliding chute (7.5), a sliding block (7.6) is arranged in the sliding chute, and the sliding block (7.6) is connected with the jack (7.8) through a hinge (7.7) through a slotted hole (7.11).

5. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: the upper clamping plate (7.1) and the lower clamping plate (7.3) slide up and down along the vertical guide rail (7.2) to clamp the section bar.

6. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: the other end of the radial arm (7.4) is connected with a fixed rod (7.10) fixed on the frame (10), which means that the other end of the radial arm (7.4) is sleeved on the fixed rod (7.10) through a circular ring.

7. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: a spring (12) is additionally arranged between the rotary arm (7.4) and the fixed plate (7.9).

8. The pultrusion production device for the fiber reinforced composite material curved profiles as claimed in claim 1, characterized in that: the other end of the spiral arm (7.4) is sleeved on the fixed rod (7.10) through a circular ring, and a torsion spring is additionally arranged in the circular ring.

9. A method for producing a curved profile by using pultrusion production equipment of the fiber reinforced composite curved profile as claimed in any one of claims 1 to 8, comprising the following steps of:

1) controlling a creel (1) to discharge yarns, and immersing the yarns into a resin glue tank (4) through a guide roller (3) for glue dipping after the yarns are gathered by a fiber cloth arranging plate (2);

2) the yarn is dipped in glue and then enters a preforming mold (5), after redundant resin and bubbles are removed, the yarn enters a curing mold (6), and a bent section bar (11) is formed through heating and extrusion;

3) the bent section (11) is pulled out along a curved track by a first bending traction device (7), when the bent section is pulled to a second bending traction device (8), the second bending traction device (8) clamps the section (11), the first bending traction device (7) is loosened, the bent section is continuously pulled out along the curved track by the second bending traction device (8), meanwhile, the first bending traction device (7) moves back, when the first bending traction device (7) is retracted to an outlet of a curing mould (6), the second bending traction device (8) is pulled to the farthest distance, the first bending traction device (7) clamps the section (11) at the outlet, the bent section is continuously pulled out, the second bending traction device (8) loosens the section (11), the section moves back until the initial position is in butt joint with the first bending traction device (7), the previous process is repeated, and after the section is reciprocated for a certain length, the cutting device (9) is used for cutting, forming a curved profile.

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