Round fiber reinforced thermoplastic rib bending reinforcing device and method

Abstract

The invention discloses a round fiber-reinforced thermoplastic rib bending reinforcing device and method, and belongs to the technical field of thermoplastic rib bending reinforcing, a heating mechanism is arranged between a fixed clamping mechanism and a rotary clamping mechanism, an infusion pipe is arranged on the inner side of the heating mechanism, a round fiber-reinforced thermoplastic rib penetrates through the infusion pipe, and the round fiber-reinforced thermoplastic rib is arranged in the rotary clamping mechanism. The melting point of the filling pipe is larger than that of the circular fiber-reinforced thermoplastic rib, the inner diameter of the filling pipe is larger than the outer diameter of the circular fiber-reinforced thermoplastic rib, the fixed clamping mechanism and the rotary clamping mechanism are used for fixing one end of the circular fiber-reinforced thermoplastic rib respectively, a guide rail groove is formed in the platform, scales are arranged on the guide rail groove, and a pressing mechanism is slidably arranged in the guide rail groove. According to the circular fiber reinforced thermoplastic rib bending device, the strength is enhanced and deformation is reduced when a circular fiber reinforced thermoplastic rib is heated and bent, the cross section of the bent part cannot be flattened, and the inner diameter of the bent part can be controlled at will.

Description

Technical Field

[0001] The invention relates to the technical field of thermoplastic rib bending reinforcement, and in particular to a circular fiber-reinforced thermoplastic rib bending reinforcement device and method. Background Art

[0002] The circular fiber reinforced thermoplastic tendon is a tendon body formed by heating and compounding fibers and resins to strengthen the structure. According to production requirements, the circular fiber reinforced thermoplastic tendon needs to be partially bent. The prior art, such as Patent No. CN118358148A, discloses a bending device and method, which clamps the two sides of the tendon by two plates, and after being heated and softened in the middle oven, it is bent by turning the handle, and the column is used to limit the position during rotation. However, the circular groove on the plate is not applicable. If the circular groove is too large, the tendon cannot be clamped. If the clamping force is simply increased, the tendon material will be fractured because the contact surface between the circular groove and the tendon is too small. If the circular groove is too small, the tendon material cannot be directly inserted into the circular groove. Unlike metal (such as steel bars), it has plastic deformation. Due to the properties of the composite reinforcement, if the composite reinforcement is bent directly after heating, the fiber filaments will separate directly due to the lack of resin restraint, which will greatly reduce the strength of the reinforcement at the bend. If the composite reinforcement is bent directly after heating, the fiber filaments will not be a smooth circle due to the lack of resin restraint, and multiple stress concentration points will appear. If the heating zone is too long, the fibers will separate directly and the reinforcement will not be formed. If the heating zone is too short, the reinforcement at the bend will be flat, and the too small bending radius will also cause stress concentration. Due to the characteristics of thermoplastic resin, resin will definitely drip from the reinforcement after heating, resulting in too little resin content in the reinforcement, which will cause the fibers to be exposed and the fibers cannot be coordinated to bear the force, resulting in a significant reduction in the strength of the reinforcement at the bend.

[0003] Patent No. CN118418426A discloses a fiber-reinforced thermoplastic resin composite stirrup bending device and method, which is formed by putting on a silicone protective tube and then bending the reinforcement by fixing the column after heating. However, the silicone protective sleeve is only for protection and cannot prevent the resin from flowing out, resulting in fiber exposure and reduced strength. The reinforcement in the heating zone is only controlled by the silicone tube, and the cross-section of the reinforcement in the tube will be deformed. Because the thermoplastic reinforcement is a composite material of fiber and resin, the fiber volume content is about 60%-75%. After heating, the resin becomes liquid again, and the fiber will become flat. The resin will gather under the silicone protective tube, and the resin above will be less. After cooling and forming, the fibers of the reinforcement will remain flat, and there will be a lack of resin on the reinforcement. A common phenomenon is missing corners, and a full circle cannot be guaranteed. The bending radius of the reinforcement at the bend cannot be controlled during heating and bending.

[0004] Patent No. CN106863766A discloses a thermoplastic FRP rib bending device, which completes the heating, bending and cooling process through a mechanical device. However, the device has a complex structure and cannot solve the problems of fiber explosion, resin precipitation, and cannot control the bending radius.

[0005] Therefore, when the prior art is heated, due to the material properties of the thermoplastic resin, the resin in the heated area will melt back into liquid resin, resulting in dry fibers in the reinforcement material in the heated area, causing a decrease in strength; when heated, the resin melts into a liquid state, and when bending at this time, due to the lack of resin constraints, the cross-section of the reinforcement will become flat, and in severe cases, the fibers will explode, seriously affecting the strength of the reinforcement material in the bending area; the bending radius of the reinforcement material in the bent part cannot be controlled, and it cannot be used in certain construction environments that have requirements for the bending radius. Summary of the invention

[0006] In order to solve the technical problems mentioned in the above background technology, the present invention provides a circular fiber reinforced thermoplastic rib bending reinforcement device, and the technical solution adopted is as follows:

[0007] It includes a platform, on which a bending enhancement device is arranged, the bending enhancement device includes a fixed clamping mechanism and a rotating clamping mechanism arranged on the platform, a heating mechanism is arranged between the fixed clamping mechanism and the rotating clamping mechanism, a perfusion tube is arranged on the inner side of the heating mechanism, a circular fiber reinforced thermoplastic rib runs through the perfusion tube, the melting point of the perfusion tube is greater than the melting point of the circular fiber reinforced thermoplastic rib, the inner diameter of the perfusion tube is greater than the outer diameter of the circular fiber reinforced thermoplastic rib, the fixed clamping mechanism and the rotating clamping mechanism each fix one end of the circular fiber reinforced thermoplastic rib, a guide rail groove is arranged on the platform, a scale is arranged on the guide rail groove, a pressing mechanism is slidably arranged in the guide rail groove, the pressing mechanism presses down the perfusion tube, a rotating groove is also arranged on the platform, and a rotating clamping mechanism is arranged on one side of the rotating groove.

[0008] Preferably, the fixing clamping mechanism comprises two fixing clamping blocks with built-in semi-square holes, and the fixing clamping blocks are fixed to the platform by bolts.

[0009] Preferably, the rotary clamping mechanism comprises a rotary clamping member and a fixing member, the rotary clamping member comprises two rotary clamping blocks with built-in semi-square holes, and the rotary clamping blocks are slidably fixed on the fixing member by bolts.

[0010] Preferably, the fixing member comprises a rotating clamping base, which is arranged outside the rotating groove, a rotating column is rotatably arranged on the rotating clamping base, the rotating column is fixed on the platform, and the rotating clamping block is slidably fixed on the rotating clamping base by bolts.

[0011] Preferably, two rotating holes are arranged on the upper side of the rotating clamping block and one rotating hole is arranged on each side, and a group of clamping base guide grooves are arranged on the rotating clamping base. Bolts pass through the rotating holes and the clamping base guide grooves to slide and fix the rotating clamping block on the rotating clamping base.

[0012] Preferably, the surfaces of the semi-square holes of the fixed clamp block and the rotating clamp block are lined with rubber, and the two semi-square holes are spliced ​​into a diamond-shaped hole.

[0013] Preferably, the heating mechanism comprises a heating box fixed on the platform, the upper part of the heating box is an open structure, and a heating plate is arranged on the heating box.

[0014] Preferably, the pressing mechanism comprises a pressing rod movably arranged in the guide rail groove, a lower pressing plate is arranged on the pressing rod, a circular groove is arranged on the circumferential surface of the lower pressing plate, and a circular fiber-reinforced thermoplastic rib is arranged in the circular groove.

[0015] Preferably, the perfusion tube is made of PU material.

[0016] The enhancement method includes the following steps:

[0017] Step 1: Put the infusion tube on the circular fiber-reinforced thermoplastic rib;

[0018] Step 2: fix the two ends of the circular fiber-reinforced thermoplastic rib respectively by a fixed clamping mechanism and a rotating clamping mechanism;

[0019] Step 3: heating the perfusion pipe and the circular fiber-reinforced thermoplastic ribs wrapped by the perfusion pipe through a heating mechanism to soften the perfusion pipe;

[0020] Step 4: Rotate the rotating clamping mechanism to twist the softened portion of the circular fiber-reinforced thermoplastic rib in step 3 by 1 to 5 turns;

[0021] Step 5, press the pressing mechanism downward to make it bend the heated and softened part in step 4, and bend it into an arc of a specified radius according to the scale of the guide groove, and at the same time, slide and rotate the rotating clamp on the clamping base through the guide groove of the clamping base to tighten the circular fiber-reinforced thermoplastic ribs;

[0022] Step 6: Inject liquid resin into the infusion tube to fill the bent part of the circular fiber-reinforced thermoplastic rib.

[0023] The present invention has the following advantages: by putting an injection tube on the circular fiber reinforced thermoplastic rib, and fixing the circular fiber reinforced thermoplastic rib with a fixed clamping mechanism and a rotating clamping mechanism respectively, the heating mechanism heats the injection tube and the circular fiber reinforced thermoplastic rib part in the injection tube to soften it, and then the rotating clamping mechanism is rotated in the circumferential direction of the circular fiber reinforced thermoplastic rib to rotate the right part of the circular fiber reinforced thermoplastic rib, while the left part cannot be rotated due to being fixed by the fixed clamping mechanism, so the heated and softened part of the circular fiber reinforced thermoplastic rib is twisted into a twist shape when rotating, so that the cross section of the circular fiber reinforced thermoplastic rib in the bending area is still circular through twisting, and the structural strength of the softened part is increased, and the softened knob part is softened by the subsequent pressing mechanism. When the circular fiber reinforced thermoplastic rib is pressed down and bent, the cross section of the bent portion will not be deformed and become flat, and the inner diameter of the bent portion can be accurately controlled by the scale on the guide groove, and the rotating clamping mechanism also plays two other roles at this time. One is horizontal fixation to prevent the bent portion of the circular fiber reinforced thermoplastic rib from rotating and deforming, and the other is to pull and migrate as the circular fiber reinforced thermoplastic rib is bent to prevent excessive stretching of the circular fiber reinforced thermoplastic rib. Then liquid resin is injected into the perfusion tube to fill the circular fiber reinforced thermoplastic rib portion that is bent and twisted into a twist shape to keep its round surface. The present invention not only increases the strength of the circular fiber reinforced thermoplastic rib and reduces deformation when it is heated and bent, but also prevents the cross section of the bent portion from becoming flat, and the inner diameter of the bent portion can be controlled at will. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of the present invention;

[0025] Figure 2 A three-dimensional diagram of a rotating clamp block of the present invention;

[0026] Figure 3 It is a three-dimensional diagram of the rotating clamping base of the present invention.

[0027] Figures: 1 platform, 2 perfusion tube, 3 circular fiber reinforced thermoplastic ribs, 4 guide grooves, 5 rotating grooves, 6 fixed clamps, 7 rotating clamps, 8 rotating clamping bases, 9 rotating columns, 10 rotating holes, 11 guide grooves of clamping bases, 12 heating boxes, 13 heating plates, 14 pressure rods, 15 lower pressure plates, 16 circular grooves.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Please refer to Figure 1-3The present invention discloses a circular fiber reinforced thermoplastic rib bending and reinforcing device, comprising a platform 1, on which a bending and reinforcing device is arranged, the bending and reinforcing device comprises a fixed clamping mechanism and a rotating clamping mechanism arranged on the platform, a heating mechanism is arranged between the fixed clamping mechanism and the rotating clamping mechanism, a perfusion pipe 2 is arranged inside the heating mechanism, the length of the perfusion pipe 2 is greater than the length of the heating mechanism, so that both ends of the perfusion pipe 2 are exposed to the outside of the heating mechanism when bent, so as to facilitate the perfusion pipe 2 to be perfused with liquid resin, a circular fiber reinforced thermoplastic rib 3 is penetrated in the perfusion pipe 2, the melting point of the perfusion pipe 2 is greater than the melting point of the circular fiber reinforced thermoplastic rib 3 (140-200°C), so as to ensure that the perfusion pipe 2 does not deform when the circular fiber reinforced thermoplastic rib 3 is heated and softened, the inner diameter of the perfusion pipe 2 is greater than the outer diameter of the circular fiber reinforced thermoplastic rib 3, and is generally 1-5 mm larger according to actual needs, so as to ensure that the liquid resin is fully perfused into the perfusion pipe 2 The circular fiber reinforced thermoplastic rib part that is fully impregnated and wrapped with the torsion softened bending part will not have the situation that the dry fibers of the thermoplastic rib are exposed, and it also has a certain reinforcement effect. The fixed clamping mechanism and the rotating clamping mechanism each fix one end of the circular fiber reinforced thermoplastic rib 3. The fixed clamping mechanism fixes one end of the circular fiber reinforced thermoplastic rib 3 so that it cannot rotate. The rotating clamping mechanism rotates one end of the circular fiber reinforced thermoplastic rib 3 so that the heated and softened part of the circular fiber reinforced thermoplastic rib 3 is twisted into a twist shape. A guide rail groove 4 is provided on the platform 1, and a scale is provided on the guide rail groove 4. A pressing mechanism is slidingly provided in the guide rail groove 4. The pressing mechanism presses down the perfusion tube 2, and the pressing mechanism moves downward on the guide rail groove 4. The perfusion tube 2 and the circular fiber reinforced thermoplastic rib 3 are both pressed down and bent, and pressed down a certain distance according to the scale on the guide rail groove 4. A rotating groove 5 is also provided on the platform 1, and a rotating clamping mechanism is provided on one side of the rotating groove 5.

[0030] The fixed clamping mechanism includes two fixed clamping blocks 6 with built-in semi-square holes, and the fixed clamping blocks 6 are fixed to the platform 1 by bolts. After the circular fiber-reinforced thermoplastic rib 3 is clamped by the two fixed clamping blocks 6, the fixed clamping blocks 6 are fixed to the platform 1 by bolts so that the circular fiber-reinforced thermoplastic rib 3 is clamped. The rotating clamping mechanism includes a rotating clamping member and a fixing member. The rotating clamping member includes two rotating clamping blocks 7 with built-in semi-square holes, and the rotating clamping block 7 is slidably fixed to the fixing member by bolts. Similarly, the two rotating clamping blocks 7 clamp the circular fiber-reinforced thermoplastic rib 3, and then the rotating clamping block 7 is slidably fixed to the fixing member by bolts. The fixing member includes a rotating clamping base 8, and the rotating clamping base 8 is arranged on the outside of the rotating groove 5, so that it is convenient to install the rotating clamping base 8 with bolts on the clamping base guide groove 11. A rotating column 9 is rotatably arranged on the rotating clamping base 8, and the rotating column 9 is fixed on the platform 1. The rotating clamping base 8 can rotate on the rotating column 9, and the rotating clamping block 7 is slidably fixed to the rotating clamping base 8 by bolts.

[0031] Two rotating holes 10 are provided on the upper side of the rotating clamp 7, and one rotating hole 10 is provided on each side. In this way, when the two rotating clamps 7 are assembled together to form a rectangular parallelepiped, the upper, lower, front and back four faces of the entire rectangular parallelepiped have two rotating holes 10. No matter which face the rotating block 7 rotates to, one of the faces can have two rotating holes 10, and the rotating clamp 7 can be fixed by passing two bolts through the two rotating holes 10. A group of clamping base guide grooves 11 are provided on the rotating clamping base 8. The bolts pass through the rotating holes 10 and the clamping base guide grooves 11 to slide the rotating clamp 7 on the rotating clamping base 8, so that the rotating clamp 7 can slide to the left in the clamping base guide groove 11 when it is fixed on the rotating clamping base 8 and cannot rotate in the circumferential direction.

[0032] The surfaces of the semi-square holes of the fixed clamp block 6 and the rotating clamp block 7 are lined with rubber. The two semi-square holes are spliced ​​into a diamond hole. Different from the conventional circular clamp, the diamond hole clamp is suitable for circular reinforcements of most outer diameters. The rubber lining also increases the friction of the clamp on the reinforcement and prevents the clamp from crushing the circular fiber-reinforced thermoplastic reinforcement 3.

[0033] The heating mechanism includes a heating box 12 fixed on the platform 1. The upper part of the heating box 12 is an open structure. A heating plate 13 is provided on the heating box 12 for heating the space of the heating box 12, so as to melt the circular fiber reinforced thermoplastic ribs 3 in the bending area.

[0034] The pressing mechanism includes a pressing rod 14 movably arranged in the guide rail groove 4, and a lower pressing plate 15 is arranged on the pressing rod 14. The pressing rod 14 passes through the guide rail groove 4. One side of the two sides of the guide rail groove 4 is the lower pressing plate 15, and the other side is a limiting block with a diameter larger than the inner diameter of the guide rail groove 4, so that the lower pressing plate 15 can be movably limited in the guide rail groove 4. A circular groove 16 is arranged on the circumferential surface of the lower pressing plate 15, and a circular fiber-reinforced thermoplastic rib 3 is arranged in the circular groove 16. When the lower pressing plate 15 presses down the circular fiber-reinforced thermoplastic rib 3, it is just limited in the circular groove 16.

[0035] The perfusion tube 2 is made of PU material and can be bent when heated without the inner diameter being flattened.

[0036] The method for heating, bending and reinforcing a circular fiber-reinforced thermoplastic rib of the present invention comprises the following steps:

[0037] Step 1: first apply a release agent on the inner wall of the perfusion tube 2, and then put the perfusion tube 2 on the circular fiber-reinforced thermoplastic rib 3;

[0038] Step 2: Clamp one end of the circular fiber-reinforced thermoplastic rib 3 by splicing two fixing clamps 6, and then fix the fixing clamps 6 on the platform 1 by bolts;

[0039] Step 3, the heating plate 13 heats the heating box 12, and the heating box 12 heats the perfusion tube 2 and the circular fiber-reinforced thermoplastic rib 3 wrapped by the perfusion tube 2, so that the circular fiber-reinforced thermoplastic rib 3 of this part is softened;

[0040] Step 4: The worker puts two rotating clamps 7 together to clamp the other end of the circular fiber reinforced thermoplastic rib 3 and twists the circular fiber reinforced thermoplastic rib 3 in the direction of the circumferential surface of the circular fiber reinforced thermoplastic rib 3 for 3 turns. Since one end is fixed by two fixed clamps 6 and cannot rotate, and the other end is clamped by the rotating clamp 7 that has not been heated and softened, when the rotating clamp 7 rotates the circular fiber reinforced thermoplastic rib 3, the end clamped by the fixed clamp 6 does not move, and the heated and softened part of the circular fiber reinforced thermoplastic rib 3 in the perfusion tube 2 is twisted into a twist shape. Then, the rotating clamping base 8 is rotated on the rotating column 10 to the bottom of the rotating clamping block 7, and two bolts are passed through the rotating hole 10 and the clamping base guide groove 11 and nuts are fastened at the bottom. In this way, the turning force of the screwed part of the circular fiber reinforced thermoplastic rib 3 is limited by the rotating clamping base 8, and the rotating clamp 7 cannot rotate.

[0041] Step 5: The worker presses the lower pressing plate 15 downward by hand, and the circular groove 16 on the lower pressing plate 15 clamps the perfusion tube 2. The perfusion tube 2 and the circular fiber-reinforced thermoplastic rib 3 in the internal softened part are bent downward, and the moving distance is pressed downward according to the scale of the guide groove 4 to bend an arc of a specified radius. At the same time, the rotating clamp 7 on the clamping base 8 is slid and rotated through the clamping base guide groove 11 to tighten the circular fiber-reinforced thermoplastic rib 3.

[0042] Step six, inject liquid resin into the perfusion tube 2 to fill the outer surface of the bent part of the circular fiber reinforced thermoplastic rib 3 inside it, then cool it to solidify it, and then use a blade to slide the perfusion tube 2 on the circular fiber reinforced thermoplastic rib 3, remove the perfusion tube 2, and obtain the finished round fiber reinforced thermoplastic rib 3 after bending.

[0043] The present invention is simple to operate, convenient to use, and suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circular fiber-reinforced thermoplastic rib bending reinforcement device, comprising a platform (1), on which a bending reinforcement device is arranged, characterized in that: The bending reinforcement device comprises a fixed clamping mechanism and a rotating clamping mechanism arranged on a platform, a heating mechanism is arranged between the fixed clamping mechanism and the rotating clamping mechanism, a perfusion pipe (2) is arranged inside the heating mechanism, a circular fiber reinforced thermoplastic rib (3) is passed through the perfusion pipe (2), the melting point of the perfusion pipe (2) is greater than the melting point of the circular fiber reinforced thermoplastic rib (3), the inner diameter of the perfusion pipe (2) is greater than the outer diameter of the circular fiber reinforced thermoplastic rib (3), the fixed clamping mechanism and the rotating clamping mechanism each fix one end of the circular fiber reinforced thermoplastic rib (3), a guide rail groove (4) is arranged on the platform (1), a scale is arranged on the guide rail groove (4), a pressing mechanism is slidably arranged in the guide rail groove (4), the pressing mechanism presses down the perfusion pipe (2), a rotating groove (5) is also arranged on the platform (1), and a rotating clamping mechanism is arranged on one side of the rotating groove (5).

2. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 1, characterized in that: The fixed clamping mechanism comprises two fixed clamping blocks (6) with built-in semi-square holes, and the fixed clamping blocks (6) are fixed on the platform (1) by means of bolts.

3. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 1, characterized in that: The rotary clamping mechanism comprises a rotary clamping member and a fixing member. The rotary clamping member comprises two rotary clamping blocks (7) with built-in semi-square holes. The rotary clamping blocks (7) are slidably fixed on the fixing member by bolts.

4. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 3, characterized in that: The fixing member comprises a rotating clamping base (8), the rotating clamping base (8) is arranged outside the rotating groove (5), a rotating column (9) is rotatably arranged on the rotating clamping base (8), the rotating column (9) is fixed on the platform (1), and the rotating clamping block (7) is slidably fixed on the rotating clamping base (8) by bolts.

5. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 4, characterized in that: The upper side of the rotating clamp block (7) is provided with two rotating holes (10), and the two sides are provided with one rotating hole (10). The rotating clamp base (8) is provided with a group of clamp base guide grooves (11). Bolts pass through the rotating holes (10) and the clamp base guide grooves (11) to slide and fix the rotating clamp block (7) on the rotating clamp base (8).

6. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 2 or 5, characterized in that: The surfaces of the semi-square holes of the fixed clamp block (6) and the rotating clamp block (7) are lined with rubber, and the two semi-square holes are spliced ​​into a diamond-shaped hole.

7. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 1, characterized in that: The heating mechanism comprises a heating box (12) fixed on the platform (1); the upper part of the heating box (12) is an open structure; and a heating plate (13) is arranged on the heating box (12).

8. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 1, characterized in that: The pressing mechanism comprises a pressing rod (14) movably arranged in the guide rail groove (4), a lower pressing plate (15) being arranged on the pressing rod (14), a circular groove (16) being arranged on the circumferential surface of the lower pressing plate (15), and a circular fiber-reinforced thermoplastic rib (3) being arranged in the circular groove (16).

9. A circular fiber reinforced thermoplastic rib bending reinforcement device according to claim 1, characterized in that: The perfusion tube (2) is made of a soft tube material.

10. A circular fiber reinforced thermoplastic rib bending reinforcement device according to any one of claims 1 to 9, characterized in that: The enhancement method includes the following steps: Step 1: Put the perfusion tube (2) onto the circular fiber-reinforced thermoplastic rib (3); Step 2: respectively fix two ends of the circular fiber-reinforced thermoplastic rib (3) by means of a fixed clamping mechanism and a rotating clamping mechanism; Step 3: heating the perfusion tube (2) and the circular fiber-reinforced thermoplastic rib (3) wrapped around the perfusion tube by a heating mechanism to soften the portion; Step 4: rotating the rotating clamping mechanism to twist the softened portion of the circular fiber-reinforced thermoplastic rib (3) in step 3 by 1 to 5 turns; Step 5, pressing the pressing mechanism downward, so that the pressing mechanism bends the heated and softened part in step 4, and bends an arc of a specified radius according to the scale of the guide groove (4), and at the same time, slides and rotates the rotating clamping block (7) on the clamping base (8) through the clamping base guide groove (11) to tighten the circular fiber-reinforced thermoplastic rib (3); Step 6: Inject liquid resin into the infusion tube (2) to fill the bent portion of the circular fiber-reinforced thermoplastic rib (3).

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