Off-line weaving subsystem and pultrusion system

Abstract

The invention provides an off-line weaving subsystem and a pultrusion system, and belongs to carbon fiber production equipment. An off-line weaving subsystem comprises a core mold and a weaving machine, wherein the weaving machine is used for weaving carbon fibers onto the core mold and weaving the carbon fibers into a prefabricated body; and the preform stripping unit is used for stripping the preform formed by weaving on the core mold from the core mold, and after the carbon fibers are woven on the core mold by the weaving machine to form the preform, the preform stripping unit continuously strips the preform from the core mold and keeps the integrity of the preform. Through the arrangement of the preform stripping unit, the preform braided on the core mold can be stripped, so that the braiding speed of the braiding machine can be ensured not to be limited, and the utilization rate of the braiding machine can be improved.

Description

Technical Field

[0001] The invention belongs to the field of carbon fiber production equipment, and in particular relates to an off-line braiding subsystem and a pultrusion molding system. Background Art

[0002] The current braiding and pultrusion process is mostly online braiding-pultrusion, where a braiding machine is matched with a set of pultrusion dies. After the braiding machine is braided and formed, it is formed through the subsequent pultrusion die. Since braiding and pultrusion need to be performed at the same time, the braiding speed will be limited by the pultrusion speed, which will lead to a low utilization rate of the braiding machine. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an off-line braiding subsystem and a pultrusion system to solve the problem of low utilization rate of the braiding machine in the prior art.

[0004] To achieve the above-mentioned object and other related objects, the present invention provides an off-line weaving subsystem, the weaving subsystem comprising: Core mold, A braiding machine, which braids the carbon fibers onto a core mold and into a preform; The preform stripping unit is used to strip the preform woven on the core mold off the core mold. After the braiding machine weaves the carbon fiber onto the core mold to form the preform, the preform stripping unit continuously strips the preform from the core mold and maintains the integrity of the preform.

[0005] As an optional solution, the preform stripping unit includes a winding disk and a rotating power element; The winding disk is rotatably arranged, and the woven preform is wound onto the winding disk; The rotating power element drives the winding disk to rotate.

[0006] As an optional solution, the preform stripping unit includes two grippers and a mobile power assembly; The two grippers are arranged in sequence along the axis of the core mold, the grippers clamp the preform formed by weaving, and the moving power component drives the grippers to move back and forth along the axis direction of the core mold.

[0007] As an optional solution, the moving power assembly includes two hydraulic cylinders, each of the clamping hands corresponds to one hydraulic cylinder, and the hydraulic cylinder drives the clamping hands to move back and forth along the axis direction of the core mold.

[0008] As an optional solution, the braiding subsystem further includes a core mold moving unit, and the moving end of the core mold moving unit drives the core mold to move along its axis.

[0009] As an optional solution, the core mold moving unit includes a robot arm, which clamps the core mold. The core mold can be reciprocated along its axis driven by the robot arm.

[0010] As an optional solution, the core mold moving unit includes a moving hydraulic cylinder, which is connected to the core mold. The moving hydraulic cylinder is started and drives the core mold to move back and forth along its axis.

[0011] The present invention also provides a pultrusion system, comprising the above-mentioned off-line braiding subsystem, and also comprising a pultrusion unit for pultruding a preform, wherein the pultrusion unit comprises a resin infiltrator, a pultrusion die and a tractor; The resin infiltrator, pultrusion die and tractor are arranged in sequence, and the tractor pulls the preform through the resin infiltrator and the pultrusion die in sequence. The resin infiltrator is used to impregnate the preform with resin, and the pultrusion die is used to solidify and mold the preform impregnated with resin. The pultrusion die and the braiding machine are located on different production lines respectively.

[0012] As an optional solution, the pultrusion unit includes a first guide rod, and the preform passes over the first guide rod and enters the resin infiltrator.

[0013] As an optional solution, the resin infiltrator includes an infiltrator body, a through hole, a first preform expansion piece, a resin infiltration cavity, a second preform expansion piece and a connecting rod; The infiltrator body is located at the inlet side of the pultrusion die, the through hole passes through the left and right end faces of the infiltrator body, the axis of the through hole coincides with the pultrusion center line of the pultrusion die, one end of the through hole close to the pultrusion die is the outlet end of the through hole, and the other end of the through hole is the inlet end of the through hole; The first preform expansion piece is located at the entrance end of the through hole, the diameter of the first preform expansion piece is greater than the diameter of the through hole, the distance between the outer wall of the first preform expansion piece and the boundary of the entrance end of the through hole is m, the thickness of the preform is n, m=n, and the preform is sleeved on the outer wall of the first preform expansion piece; One end of the second preform expansion piece is inserted into the through hole from the outlet end of the through hole, and the other end of the second preform expansion piece is inserted into the pultrusion die from the inlet of the pultrusion die, the preform is sleeved on the outer wall of the second preform expansion piece, and the outer wall of the preform at the outlet end of the through hole contacts the inner wall of the through hole; The inner wall of the through hole, the second preform expansion piece and the first preform expansion piece form a resin infiltration cavity; The connecting rod is located in the through hole, one end of the connecting rod is fixedly connected to the second preform expansion piece, and the other end of the connecting rod is fixedly connected to the first preform expansion piece.

[0014] As described above, the off-line braiding subsystem and pultrusion system of the present invention have at least the following beneficial effects: 1. The preform stripping unit provided in the present application can strip off the preform woven on the core mold, thereby ensuring that the weaving speed of the weaving machine will not be limited, thereby improving the utilization rate of the weaving machine; 2. The present application provides the first preform expansion piece and the second preform expansion piece, which can expand the preform when the preform is infiltrated with resin, thereby improving the infiltration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic structural diagram of a pultrusion system of the present invention; Figure 2 Shown is a structural schematic diagram of a mobile hydraulic cylinder and a core mold of the present invention; Figure 3 It is a schematic structural diagram of a rotating power element and a winding disk in one embodiment of a preform stripping unit of the present invention; Figure 4 It is a schematic structural diagram of a hydraulic cylinder and a gripper in another embodiment of a preform stripping unit of the present invention; Figure 5 It is a schematic diagram showing the structure of the second guide rod of the present invention being arranged between the winding disk and the core mold; Figure 6 Shown is a cross-sectional view of the structure of the resin infiltrator of the present invention.

[0016] In the figure: 11, core mold; 12, braiding machine; 13, resin impregnator; 14, pultrusion die; 15, tractor; 16, first guide rod; 17, preform; 21. Winding reel; 22. Rotating power element; 23. Second guide rod; 31. Clamping hand; 32. Hydraulic cylinder; 41. Manipulator; 42. Mobile hydraulic cylinder.

[0017] 51. Infiltrator body; 52. First preform expansion piece; 53. Resin infiltration cavity; 54. Second preform expansion piece; 55. Connecting rod; 56. Third preform expansion piece. DETAILED DESCRIPTION

[0018] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0019] See also Figures 1 to 6. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0020] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0021] See also Figure 1-Figure 5 The present invention provides an off-line weaving subsystem, which comprises: The core mold 11 can be round, square, rectangular, etc. A braiding machine 12, wherein the braiding machine 12 braids the carbon fibers onto the core mold 11 and braids the preform 17. The braiding machine 12 may be a three-dimensional braiding machine or other types of braiding machines, and is used to braid the carbon fibers onto the core mold 11; The preform stripping unit is used to strip the preform 17 woven on the core mold 11 off the core mold 11. After the braiding machine 12 weaves the carbon fiber onto the core mold 11 to form the preform 17, the preform stripping unit continues to strip the preform 17 from the core mold 11 and maintains the integrity of the preform 17.

[0022] When weaving carbon fiber, the weaving machine 12 first weaves the carbon fiber onto the core mold 11 to form a preform 17, and then the preform 17 on the core mold 11 is completely peeled off from the core mold 11 through the preform stripping unit, so that the carbon fiber weaving can be continued. At this time, the weaving speed is only limited by the speed of the weaving machine 12, so that the production speed of the weaving machine 12 can be released, thereby improving the utilization rate of the weaving machine 12.

[0023] As a first embodiment of the preform stripping unit, please refer to Figure 1 and Figure 3 , the preform stripping unit comprises a winding disk 21 and a rotating power element 22; The winding disk 21 is rotatably arranged, and the woven preform 17 is wound onto the winding disk 21; The rotating power element 22 drives the winding disk 21 to rotate. The rotating power element 22 here is mainly used to drive the winding disk 21 to rotate, so that the winding disk 21 can wind up the preform 17. The winding disk 21 can be directly detached from the motor shaft of the motor, or the motor shaft of the motor can be connected to the winding disk 21 through a gearbox. Since the preform 17 is wound on the winding reel 21, after the preform 17 is wound on the winding reel 21 to a certain thickness, the preform 17 can be cut, and the winding reel that has been wound can be removed and a new winding reel can be installed. The winding reel 21 is set to be detachable, so that continuous carbon fiber weaving can be achieved. Here, the connected winding reel 21 that is directly detachable from the motor shaft of the motor is taken as an example. The motor shaft of the motor passes through the winding reel 21, and the axis of the motor shaft of the motor coincides with the axis of the winding reel 21. The winding reel 21 is provided with a mounting hole that passes through two side walls, and key slots are provided on the outer wall of the motor shaft of the motor and the inner wall of the mounting hole. The key is inserted into the two key slots to realize the rotation of the winding reel 21. For the rotation limit, there are limit columns on the opposite sides of the winding drum 21, and the two limit columns are respectively a first limit column and a second limit column. The first limit column is fixedly mounted on the motor shaft of the motor, and a threaded hole is provided at the end of the motor shaft of the motor, and the axis of the threaded hole is parallel to the axis of the motor shaft of the motor. The second limit column is attached to the end of the motor shaft of the motor, and the bolt passes through the second limit column and is threadedly connected to the threaded hole. Since the winding drum 21 is located between the first limit column and the second limit column, when the winding drum 21 rotates, due to the limiting effect of the first limit column and the second limit column, it will not fall off the motor shaft of the motor, thereby realizing the axial limitation of the winding drum 21.

[0024] When starting to weave carbon fiber, a section of preform 17 can be weaved on the core mold 11 first, and then the operator manually peels the braided section off the core mold 11 and winds it on the winding disk 21. At this time, the motor starts to rotate, thereby driving the winding disk 21 to rotate, so that the preform 17 woven by the core mold 11 is continuously peeled off the lower core mold 11 and wound onto the rotating disk, thereby realizing continuous weaving of the carbon fiber preform 17.

[0025] In order to better avoid excessive friction between the preform 17 and the edge of the core mold 11 during peeling, a second guide rod 23 can be set between the winding disk 21 and the core mold 11. The axis of the second guide rod 23 is parallel to the axis of the motor shaft of the motor. The cross-section of the second guide rod 23 is circular. The center line of the core mold 11 is tangent to the outer wall of the second guide rod 23. The second guide rod 23 can be set to rotate or be fixed. The preform 17 peeled off the core mold 11 bypasses the second guide rod 23 and is wound onto the rotating disk.

[0026] At the same time, the motor can also be set to a motor with adjustable speed, so as to adapt to different weaving speeds of the weaving machine 12.

[0027] As a second embodiment of the preform stripping unit, please refer to Figure 4 , the preform stripping unit comprises two grippers 31 and a mobile power assembly; The two grippers 31 are sequentially arranged along the axis of the core mold 11 . The grippers 31 clamp the braided preform 17 . The moving power assembly drives the grippers 31 to reciprocate along the axis of the core mold 11 .

[0028] The gripper 31 described here can be a gripping robot 41, or it can be a gripping block symmetrical around the center of the preform 17. The two gripping blocks are connected by a cylinder, that is, one end of the cylinder is fixedly connected to one of the gripping blocks, and the other end of the cylinder is fixedly connected to the other gripping block. The extension and retraction direction of the cylinder is perpendicular to the axial direction of the core mold 11. When the cylinder is started, it drives the two gripping blocks to approach each other, thereby clamping the preform 17 peeled off the core mold 11.

[0029] The two grippers 31 are respectively the first gripper and the second gripper, and the second gripper is located in front of the direction in which the first gripper pulls the preform 17. When the carbon fiber weaving begins, a section of the preform 17 can be woven on the core mold 11 first, and then the operator manually peels the woven section off the core mold 11, and makes the preform 17 pass through the first gripper and the second gripper in sequence. The first gripper starts to clamp the preform 17 peeled off the core mold 11, and moves toward the second gripper, so as to realize the continuous removal of the preform 17 from the core mold 11. Peeled off, at the same time, when the first gripper moves to the end of its stroke, the second gripper starts to move at the speed of the first gripper, and starts and clamps the preform 17. At this time, the first gripper and the second gripper move forward at the same speed. When the first gripper moves to the farthest stroke, the first gripper releases the preform 17 and moves back to achieve the resetting of the first gripper. At this time, the second gripper is still continuously pulling the preform 17 forward, thereby achieving continuous traction of the preform 17, and then achieving continuous peeling of the preform 17 from the lower core mold 11.

[0030] In order to better avoid excessive friction between the preform 17 and the core mold 11 during peeling, when the first gripper and the second gripper clamp the preform 17, the center line of the clamping section of the preform 17 coincides with the center line of the core mold 11. When the preform 17 is separated from the core mold 11, it will not have excessive friction with the end surface of the core mold 11, thereby ensuring the performance of the preform 17.

[0031] A material frame may be provided below the gripper 31 to collect the preforms 17 in the material frame.

[0032] As a first embodiment of the mobile power assembly, please refer to Figure 4 The moving power assembly includes two hydraulic cylinders 32 , each of the clamping hands 31 corresponds to a hydraulic cylinder 32 , and the hydraulic cylinders 32 drive the clamping hands 31 to reciprocate along the axial direction of the core mold 11 .

[0033] The two hydraulic cylinders 32 are fixedly mounted on the mounting frame, and the extension and retraction directions of the hydraulic cylinders 32 are parallel to the axial direction of the core mold 11; By starting or closing the two hydraulic cylinders 32 respectively, the two grippers 31 can be driven to move forward and backward respectively.

[0034] In the second embodiment of the mobile power component (this embodiment is not shown in the accompanying drawings), the mobile power component can also be two electric telescopic rods, both of which are fixedly mounted on a mounting frame, and the telescopic direction of the electric telescopic rods is parallel to the axial direction of the core mold 11. The electric telescopic rods drive the clamp 31 to reciprocate along the axial direction of the core mold 11.

[0035] The moving power assembly is used to drive the two grippers 31 to move respectively. It is not limited to the above two embodiments, and only needs to be able to drive the two grippers 31 to move respectively.

[0036] In this embodiment, please refer to Figure 1 and Figure 2 The braiding subsystem further comprises a core mold moving unit, the moving end of which drives the core mold 11 to move along its axis.

[0037] The core mold moving unit is provided to drive the core mold 11 to move forward and backward along the axis of the core mold 11. When the weaving of carbon fiber begins, the core mold 11 is driven forward by the core mold moving unit, so that the braiding machine 12 can normally weave the carbon fiber on the core mold 11. When the preform 17 is woven to a length that can be continuously stripped by the preform stripping unit, the operator holds the end of the preform 17 and starts the core mold moving unit, so that the core mold 11 is reset, and the preform 17 is also stripped off from the core mold 11. When the preform stripping unit is a winding drum 21 and a rotating power element 22, the length of the preform 17 woven to be continuously stripped by the preform stripping unit means that the length of the preform 17 can be wound on the winding drum 21; When the preform stripping unit is composed of two grippers 31 , the preform 17 is woven to a length that can be continuously stripped by the preform stripping unit, which means that the preform 17 can extend to the front of the second gripper.

[0038] As a first embodiment of the core mold moving unit, please refer to Figure 1The core mold moving unit includes a manipulator 41 , which clamps the core mold 11 , and the core mold 11 can reciprocate along its axis driven by the manipulator 41 .

[0039] The manipulator 41 fixes the core mold 11 by clamping, and can also replace the core molds 11 of different models for clamping, so that the production of preforms 17 of different models can be achieved.

[0040] As a second embodiment of the core mold moving unit, please refer to Figure 2 The core mold moving unit includes a moving hydraulic cylinder 42, which is connected to the core mold 11. The moving hydraulic cylinder 42 is started and drives the core mold 11 to move back and forth along its axis.

[0041] There is no special limitation on the detachable connection between the telescopic rod of the mobile hydraulic cylinder 42 and the core mold 11. The telescopic rod of the mobile hydraulic cylinder 42 can be inserted into the core mold 11, and the bolt passes through the core mold 11 and is threadedly connected to the telescopic rod of the mobile hydraulic cylinder 42. Alternatively, a mounting block can be fixedly connected to the telescopic rod of the mobile hydraulic cylinder 42, and the end of the mounting block is fixedly connected to a screw, the axis of the screw is parallel to the axis of the core mold 11, and a threaded hole is opened at the end of the core mold 11, and the bolt is threadedly connected to the threaded hole.

[0042] By replacing the core molds 11 of different types, the production of preforms 17 of different types can be achieved.

[0043] See also Figure 1 , a pultrusion system, the above-mentioned off-line braiding subsystem, further comprising a pultrusion unit for pultruding a preform 17, the pultrusion unit comprising a resin infiltrator 13, a pultrusion die 14 and a tractor 15; The resin infiltrator 13, pultrusion die 14 and tractor 15 are arranged in sequence, and the tractor 15 pulls the preform 17 through the resin infiltrator 13 and the pultrusion die 14 in sequence. The resin infiltrator 13 is used to impregnate the preform 17 with resin, and the pultrusion die 14 is used to solidify and mold the preform 17 impregnated with resin. The pultrusion die 14 and the braiding machine 12 are located on different production lines respectively.

[0044] Here, the number of pultrusion units is set to at least one, which can be 1, 2, 3, 4, etc., and different preforms 17 (different preforms 17 can be preforms 17 of different models, or preforms 17 of the same model but different sections) can be pultruded at the same time by setting multiple pultrusion units. When the number of pultrusion units is at least two, two pultrusion units simultaneously produce preforms 17 of the same model, which can greatly speed up the pultrusion speed of the preforms 17 of the model, thereby meeting the rapid production requirements of a certain model of preforms 17. When the preform stripping unit is a winding reel 21 and a rotating power element 22, the preform 17 is wound on the winding reel 21 and is in a roll shape. When pultrusion is required, the winding reel 21 is rotated and sleeved on the rotating rod, and the tractor 15 continuously pulls the pultruded profile, thereby driving the winding reel 21 to rotate and unwind, thereby achieving continuous pultrusion; When the preform stripping unit is two grippers 31, the preform 17 is directly received in the material frame. When pultrusion molding is required, the material frame is placed near the entrance of the resin infiltrator 13, and the preform 17 passes through the resin infiltrator 13 and the pultrusion die 14 in sequence to realize the molding of the profile.

[0045] In this embodiment, please refer to Figure 1 The pultrusion unit includes a first guide rod 16 , and the preform 17 passes over the first guide rod 16 and enters the resin infiltrator 13 .

[0046] The first guide rod 16 can provide guidance for the preform 17 entering the resin infiltrator 13. Since the position of the resin infiltrator 13 is fixed and the position of the first guide rod 16 is also fixed, it can be ensured that the preform 17 enters the resin infiltrator 13 at the same angle, thereby achieving consistency in production.

[0047] In this embodiment, please refer to Figure 6 The resin infiltrator comprises an infiltrator body 51, a through hole, a first preform expansion piece 52, a resin infiltration cavity 53, a second preform expansion piece 54 and a connecting rod 55; The infiltrator body 51 is located at the inlet side of the pultrusion die, the through hole passes through the left and right end faces of the infiltrator body 51, the axis of the through hole coincides with the pultrusion center line of the pultrusion die, the end of the through hole close to the pultrusion die is the outlet end of the through hole, and the other end of the through hole is the inlet end of the through hole; The first preform expansion piece 52 is located at the entrance end of the through hole, the diameter of the first preform expansion piece 52 is larger than the diameter of the through hole, the distance between the outer wall of the first preform expansion piece 52 and the boundary of the entrance end of the through hole is m, the thickness of the preform 17 is n, m=n, and the preform 17 is sleeved on the outer wall of the first preform expansion piece 52; The shape of the first preform expansion member 52 is not limited here, and can be spherical or cylindrical; When the first preform expansion member 52 is cylindrical, its end is set to a conical surface, and the conical surface portion is inserted into the through hole. Through the first preform expansion member 52, when the preform 17 is sleeved outside, the preform 17 can be stretched open, thereby loosening the preform 17 to facilitate resin infiltration; One end of the second preform expansion piece 54 is inserted into the through hole from the outlet end of the through hole, and the other end of the second preform expansion piece 54 is inserted into the pultrusion die from the inlet of the pultrusion die (generally, the inner diameter of the through hole is set to be equal to the inner diameter of the pultrusion die), and the preform 17 is sleeved on the outer wall of the second preform expansion piece 54, and the outer wall of the preform 17 at the outlet end of the through hole contacts the inner wall of the through hole; The shape of the second preform expansion member 54 is not limited here, and can be spherical or cylindrical; When the second preform expansion piece 54 is cylindrical, both ends of the second preform expansion piece 54 are set to be stepped, that is, the second preform expansion piece 54 includes a main expansion section, a first stepped section and a second stepped section, the first stepped section is inserted into the through hole, the second stepped section is inserted into the pultrusion die, the diameter value of the first stepped section plus the thickness value of the preform 17 is equal to the diameter value of the through hole, the diameter value of the second stepped section plus the thickness value of the preform 17 is equal to the inner diameter value of the pultrusion die, the outer diameter of the main expansion section is greater than the outer diameter of the first stepped section, and the outer diameter of the main expansion section is also greater than the second stepped section; by setting the second preform expansion piece 54, when the preform 17 is sleeved outside it, the preform 17 can be expanded to facilitate subsequent pultrusion curing; The inner wall of the through hole, the second preform expansion piece 54 and the first preform expansion piece 52 form a resin infiltration cavity 53, and the resin infiltration cavity 53 is filled with infiltration resin; The infiltrator body 51 is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the resin infiltration cavity 53; The connecting rod 55 is located in the through hole, one end of the connecting rod 55 is fixedly connected to the second preform expansion piece 54 , and the other end of the connecting rod 55 is fixedly connected to the first preform expansion piece 52 .

[0048] When the preform 17 passes through the first preform expansion piece 52, the preform 17 can be expanded, and after entering the resin infiltration cavity 53, the preform 17 can be infiltrated, and then covered with the second preform expansion piece 54, and enter the pultrusion mold for pultrusion curing.

[0049] In this embodiment, please refer to Figure 6A third preform expansion piece 56 may also be fixedly mounted on the connecting rod 55, the third preform expansion piece 56 being located in the resin infiltration cavity 53, the outer diameter of the third preform expansion piece 56 being smaller than the inner diameter of the through hole, and the preform 17 being sleeved outside the third preform expansion piece 56; The shape of the third preform expansion member 56 is not limited here, and can be spherical or cylindrical; When the third preform expansion piece 56 is cylindrical, one or both ends thereof are configured as conical surfaces. By configuring the third preform expansion piece 56 , when the preform 17 is sleeved outside the third preform expansion piece 56 , the preform 17 can be expanded, making it easier to infiltrate the preform 17 with resin.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An off-line weaving subsystem, characterized in that: The braiding subsystem comprises: Core mold, A braiding machine, which braids the carbon fibers onto a core mold and into a preform; A preform stripping unit, which is used to strip the preform woven on the core mold off the core mold. After the braiding machine weaves the carbon fiber onto the core mold to form the preform, the preform stripping unit continuously strips the preform from the core mold and maintains the integrity of the preform; The preform stripping unit comprises a reel and a rotating power element; the reel is rotatably arranged, and the woven preform is reeled onto the reel; the rotating power element drives the reel to rotate; Or the preform stripping unit includes two grippers and a moving power assembly; the two grippers are arranged in sequence along the axis of the core mold, the grippers clamp the woven preform, and the moving power assembly drives the grippers to move back and forth along the axis of the core mold.

2. An off-line weaving subsystem according to claim 1, characterized in that: The moving power assembly includes two hydraulic cylinders, each of the clamping hands corresponds to one hydraulic cylinder, and the hydraulic cylinder drives the clamping hands to move back and forth along the axis direction of the core mold.

3. An off-line weaving subsystem according to claim 1, characterized in that: The braiding subsystem further comprises a core mold moving unit, and the moving end of the core mold moving unit drives the core mold to move along its axis.

4. An off-line weaving subsystem according to claim 3, characterized in that: The core mold moving unit comprises a manipulator, the manipulator clamps the core mold, and the core mold can be reciprocated along its axis driven by the manipulator.

5. An off-line weaving subsystem according to claim 3, characterized in that: The core mold moving unit comprises a moving hydraulic cylinder, which is connected to the core mold. The moving hydraulic cylinder is started and drives the core mold to move back and forth along its axis.

6. A pultrusion system, comprising an off-line braiding subsystem according to claim 1, characterized in that: Also included is a pultrusion unit for pultruding the preform, the pultrusion unit comprising a resin infiltrator, a pultrusion die and a tractor; The resin infiltrator, pultrusion die and tractor are arranged in sequence, and the tractor pulls the preform through the resin infiltrator and the pultrusion die in sequence. The resin infiltrator is used to impregnate the preform with resin, and the pultrusion die is used to solidify and mold the preform impregnated with resin. The pultrusion die and the braiding machine are located on different production lines respectively.

7. A pultrusion system according to claim 6, characterized in that: The pultrusion unit includes a first guide rod, and the preform passes over the first guide rod and enters the resin infiltrator.

8. A pultrusion system according to claim 6, characterized in that: The resin infiltrator comprises an infiltrator body, a through hole, a first preform expansion piece, a resin infiltration cavity, a second preform expansion piece and a connecting rod; The infiltrator body is located at the inlet side of the pultrusion die, the through hole passes through the left and right end faces of the infiltrator body, the axis of the through hole coincides with the pultrusion center line of the pultrusion die, one end of the through hole close to the pultrusion die is the outlet end of the through hole, and the other end of the through hole is the inlet end of the through hole; The first preform expansion piece is located at the entrance end of the through hole, the diameter of the first preform expansion piece is greater than the diameter of the through hole, the distance between the outer wall of the first preform expansion piece and the boundary of the entrance end of the through hole is m, the thickness of the preform is n, m=n, and the preform is sleeved on the outer wall of the first preform expansion piece; One end of the second preform expansion piece is inserted into the through hole from the outlet end of the through hole, and the other end of the second preform expansion piece is inserted into the pultrusion die from the inlet of the pultrusion die, the preform is sleeved on the outer wall of the second preform expansion piece, and the outer wall of the preform at the outlet end of the through hole contacts the inner wall of the through hole; The inner wall of the through hole, the second preform expansion piece and the first preform expansion piece form a resin infiltration cavity; The connecting rod is located in the through hole, one end of the connecting rod is fixedly connected to the second preform expansion piece, and the other end of the connecting rod is fixedly connected to the first preform expansion piece.

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