A device for manufacturing a three-dimensional braided fabric with one end sealed

Abstract

The present invention provides a device for manufacturing a three-dimensional braided fabric with one end sealed, which belongs to the field of three-dimensional braiding and is used to solve the technical problem in the prior art that the existing three-dimensional braiding equipment cannot braid a braided fabric with a sealed structure at one end. It includes a three-dimensional braiding machine, 2N winding spindles are arranged on the inner circumference of the three-dimensional braiding machine in sequence, and the 2N winding spindles are numbered 1 to 2N in sequence, and the yarn of the i-th winding spindle is connected with the yarn of the i+N-th winding spindle, wherein: 1≤i≤N; one side of the three-dimensional braiding machine is also provided with a centering component for centering the N connected yarns, and the other side of the three-dimensional braiding machine is provided with a core component for shaping during braiding. The present application realizes the braiding of a three-dimensional braided fabric with one end sealed by connecting the yarn of the i-th winding spindle of the three-dimensional braiding machine with the yarn of the i+N-th winding spindle, and centering and fixing the N yarns through the centering component, thereby expanding the application field of three-dimensional braiding.

Description

Technical Field

[0001] The invention belongs to the field of three-dimensional braiding, and in particular relates to a device for manufacturing a three-dimensional braided fabric with one end sealed. Background Art

[0002] Three-dimensional woven composite materials are a type of textile structural composite materials. Compared with laminated composite materials, the biggest advantage of textile structural composite materials is that by increasing the fiber bundles or yarns in the thickness direction, the reinforcement fibers are distributed in three-dimensional space in multiple directions, which prevents or slows down the expansion of interlayer cracks in the composite materials under impact loads, thus greatly improving the interlayer performance of three-dimensional woven composite materials. Therefore, three-dimensional woven composite materials have higher impact damage tolerance and fracture toughness than ordinary laminated composite materials. Three-dimensional weaving technology can design the number of fibers according to actual needs, weave complex-shaped parts and complete assemblies in one go, and reduce the amount of secondary processing, such as circular, square, conical, and various shapes of gradual and transitional weaving, so it is economical, low-cost, and has a short manufacturing cycle. In addition, three-dimensional woven composite materials can be applied to the weaving of various complex geometric shapes, with high stability and integrity, strong designability, and can meet certain specific engineering needs by changing parameters such as weaving method, weaving angle, yarn density, etc.

[0003] However, most of the composite parts currently woven by 3D braiding machines are open at both ends, such as round tubes, square tubes and other tube parts. For parts with one or both ends sealed, 3D braiding machines cannot be used, which greatly limits the application of 3D braiding. Therefore, 3D braiding for components with one end sealed has become the key to expanding the application scope of 3D braiding. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a device for manufacturing a three-dimensional braided fabric with a sealed end, so as to solve the technical problem that the existing three-dimensional braiding equipment in the prior art cannot braid a braided fabric with a sealed structure at one end.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a device for manufacturing a three-dimensional braided fabric with one end sealed, comprising a three-dimensional braiding machine, wherein 2N winding spindles are sequentially arranged on the inner circumference of the three-dimensional braiding machine, and the 2N winding spindles are sequentially numbered from 1 to 2N, characterized in that the yarn of the i-th winding spindle is connected to the yarn of the i+N-th winding spindle, wherein: 1≤i≤N;

[0006] One side of the three-dimensional braiding machine is also provided with a centering component for centering and fixing the N connected yarns, and the other side of the three-dimensional braiding machine is provided with a core component for shaping during braiding.

[0007] As an optional solution, the centering assembly includes a first mounting frame, a first cylinder, a first lifting frame, a first guide rail module, a first support block, a support groove and a yarn centering mechanism;

[0008] The first mounting frame is arranged at one side of the three-dimensional braiding machine, the first cylinder extending in the vertical direction is installed on the side wall of the first mounting frame close to the three-dimensional braiding machine, the bottom end of the first lifting frame is fixedly connected to the top end of the first cylinder, and a first guide rail module for guiding the vertical sliding of the first lifting frame is also arranged between the first lifting frame and the first mounting frame;

[0009] A first support block is installed on the cross beam at the bottom end of the first lifting frame, and the first support block is provided with a support groove for supporting the woven fabric and the core assembly during weaving. A yarn centering mechanism for centering the N connected yarns is installed on the first lifting frame above the first support block.

[0010] As an optional solution, the yarn centering mechanism includes a first electric cylinder, a circular mounting plate, a second guide rail module, a positioning plate, an elastic module and a sliding module;

[0011] The first electric cylinder is mounted on a first lifting frame above the first supporting block, the telescopic direction of the first electric cylinder is the same as the axial direction of the three-dimensional knitting machine, and the circular mounting plate is mounted on the telescopic end of the first electric cylinder; a second guide rail module for guiding the horizontal sliding of the circular mounting plate is also provided between the first lifting frame and the circular mounting plate;

[0012] The positioning plate is arranged parallel to the circular mounting plate, and the center axes of the positioning plate and the circular mounting plate coincide with the axis of the three-dimensional knitting machine. The circular mounting plate and the positioning plate are connected by an elastic module. The positioning plate is located on the side of the circular mounting plate away from the first electric cylinder. A plurality of sliding modules are installed on the circular mounting plate, and the plurality of sliding modules are arranged in an equiangular array along the center of the circular mounting plate.

[0013] As an optional solution, the elastic module includes a guide rod and a spring;

[0014] One end of the guide rod is fixedly connected to the end surface of the positioning plate close to the circular mounting plate, and the other end of the guide rod is slidably guided with the circular mounting plate. The spring is sleeved on the outer wall of the guide rod, and the two ends of the spring are respectively mounted on the circular mounting plate and the positioning plate.

[0015] As an optional solution, the sliding module includes a second electric cylinder, a third guide rail module and a positioning column;

[0016] The second electric cylinder and the third guide rail module are both mounted on the circular mounting plate, one end of the positioning column is mounted on the slider of the third guide rail module, the axis of the positioning column is perpendicular to the end surface of the circular mounting plate, the telescopic end of the second electric cylinder is fixedly connected to the slider of the third guide rail module, and the telescopic direction of the second electric cylinder passes through the central axis of the circular mounting plate;

[0017] The positioning plate is provided with an elongated hole, the other end of the positioning column passes through the elongated hole, and the other end of the positioning column is provided with a first guiding angle.

[0018] As an optional solution, the centering assembly further includes a positioning cylinder, a mounting hole is opened at the center of the circular mounting plate, and the positioning cylinder is installed in the mounting hole;

[0019] A plurality of positioning grooves are provided on the side wall of the positioning cylinder close to one end of the positioning plate. The plurality of positioning grooves are arranged in an array with equal angles along the center of the positioning cylinder. The number of the positioning grooves is the same as the number of the sliding modules. The two side walls of the positioning grooves are both provided with a second guiding bevel.

[0020] Define the center position of the circular mounting plate as the coordinate origin, and set a plurality of sliding modules by rotating m degrees in sequence from the positive direction of X, and set a plurality of positioning grooves by rotating m degrees in sequence from the axis at an angle of m / 2 degrees;

[0021] The center of the positioning plate is provided with an escape hole for escaping the positioning tube. When the spring is in a free state, the end of the positioning tube close to the positioning plate does not extend out of the end surface of the positioning plate away from the circular mounting plate.

[0022] As an optional solution, a delivery pipeline for delivering adhesive is installed in the positioning cylinder, an adhesive nozzle is installed at one end of the delivery pipeline close to the positioning plate, and the other end of the delivery pipeline is connected to the adhesive pumping assembly.

[0023] As an optional solution, a transverse caster module and a longitudinal caster module are installed at the bottom end of the first mounting frame;

[0024] The mounting platform of the first mounting frame is provided with a transverse sliding groove and a longitudinal sliding groove, the transverse caster module can slide along the transverse sliding groove, and the longitudinal caster module can slide along the longitudinal sliding groove;

[0025] During weaving, the first mounting frame is mounted to a predetermined position via a fixing plate.

[0026] As an optional solution, the core assembly includes a mechanical arm and a core;

[0027] The mechanical arm is arranged at the other side of the three-dimensional braiding machine, and the mold core is installed at the moving end of the mechanical arm.

[0028] As described above, the device for manufacturing a three-dimensional braided fabric with one end sealed according to the present invention has at least the following beneficial effects:

[0029] 1. The present application connects the yarn of the i-th winding spindle of the three-dimensional braiding machine with the yarn of the i+N-th winding spindle, and centers and fixes the N yarns through a centering component, thereby realizing the weaving of a three-dimensional braided fabric with one end sealed, thereby expanding the application field of three-dimensional weaving and providing high structural strength of the braided fabric.

[0030] 2. The present application centers N yarns by sliding the positioning column radially, pushes the N yarns to the same plane through the positioning plate, places the yarn card into the positioning groove, and fixes the centers of the N yarns with adhesive, thereby realizing rapid centering and fixation of the N yarns, facilitating subsequent weaving of the three-dimensional weaving machine.

[0031] 3. In the present application, a first support block is arranged at the lower end of the first lifting frame. When the yarn centering mechanism completes centering, the first cylinder pushes the first lifting frame to rise, the three-dimensional braiding machine starts weaving, and the core assembly moves toward the side close to the positioning assembly. The first support block supports the front end of the three-dimensional braid and the core, which not only avoids the centering assembly affecting the front end movement of the three-dimensional braid and the core, but also effectively reduces the vertical load of the robot arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shown is a schematic structural diagram of the device of the present invention;

[0033] Figure 2 Shown is a schematic structural diagram of a centering assembly of the present invention;

[0034] Figure 3 Shown is a schematic structural diagram of a first mounting frame of the present invention;

[0035] Figure 4 Shown is a schematic structural diagram of the yarn centering mechanism of the present invention;

[0036] Figure 5 Shown is a cross-sectional view of the yarn centering mechanism of the present invention;

[0037] Figure 6 Shown is a schematic diagram of the circular mounting plate and the sliding module structure of the present invention;

[0038] Figure 7 It is a schematic structural diagram of the positioning cylinder, the delivery pipeline and the adhesive nozzle of the present invention.

[0039] In the figure: 1- three-dimensional braiding machine; 101- winding spindle;

[0040] 2-centering assembly; 201-first mounting frame; 202-first cylinder; 203-first lifting frame; 204-first guide rail module; 205-first support block; 206-first electric cylinder; 207-circular mounting plate; 208-second guide rail module; 209-positioning plate; 210-guide rod; 211-spring; 212-second electric cylinder; 213-third guide rail module; 214-positioning column; 215-positioning cylinder; 2051-support groove; 2071-mounting hole; 2091-long hole; 2092-avoidance hole; 2141-first guide bevel; 2151-positioning groove; 2152-second guide bevel;

[0041] 3- mold core assembly; 301- mechanical arm; 302- mold core;

[0042] 401-transport pipeline; 402-adhesive nozzle;

[0043] 501- transverse caster module; 502- longitudinal caster module; 503- transverse slide; 504- longitudinal slide; 505- fixed plate. DETAILED DESCRIPTION

[0044] 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.

[0045] See also Figures 1 to 7 . 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.

[0046] 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.

[0047] See also Figure 1 , Figure 2 and Figure 3The present invention provides a device for manufacturing a three-dimensional braided fabric with one end sealed, comprising a three-dimensional braiding machine 1, wherein 2N winding spindles 101 are sequentially arranged on the inner circumference of the three-dimensional braiding machine 1, and the 2N winding spindles 101 are sequentially numbered from 1 to 2N, and the yarn of the i-th winding spindle 101 is connected to the yarn of the i+N-th winding spindle 101, wherein: 1≤i≤N;

[0048] One side of the three-dimensional braiding machine 1 is also provided with a centering component 2 for centering and fixing the N connected yarns, and the other side of the three-dimensional braiding machine 1 is provided with a core component 3 for shaping during braiding.

[0049] In this embodiment, the three-dimensional braiding machine has 176 winding spindles 101. When it is necessary to weave a three-dimensional braided fabric with one end sealed, the centering component 2 and the core mold component 3 are respectively installed at the two ends of the three-dimensional braiding machine 1, and the yarn of the first winding spindle 101 is connected with the yarn of the 89th winding spindle 101, and so on, until the yarn of the 88th winding spindle 101 is connected with the yarn of the 176th winding spindle 101; the centering component 2 centers and fixes the connected 88 yarns, and the three-dimensional braiding machine 1 starts weaving. When the sealing structure is weaved, the core mold component 3 pushes the sealing structure to move, and the three-dimensional braiding machine 1 continues to weave the side wall of the three-dimensional braided fabric until the side wall of the three-dimensional braided fabric reaches a predetermined length and the weaving is completed.

[0050] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the centering assembly 2 includes a first mounting frame 201, a first cylinder 202, a first lifting frame 203, a first guide rail module 204, a first support block 205, a support groove 2051 and a yarn centering mechanism;

[0051] The first mounting frame 201 is arranged at one side of the three-dimensional braiding machine 1, and the first cylinder 202 extending and retracting in the vertical direction is installed on the side wall of the first mounting frame 201 close to the three-dimensional braiding machine 1. The bottom end of the first lifting frame 203 is fixedly connected to the top end of the first cylinder 202, and a first guide rail module 204 for guiding the vertical sliding of the first lifting frame 203 is also arranged between the first lifting frame 203 and the first mounting frame 201;

[0052] A first support block 205 is installed on the crossbeam at the bottom end of the first lifting frame 203, and a support groove 2051 for supporting the woven fabric is provided on the first support block 205. A yarn centering mechanism for centering the connected N yarns is installed on the first lifting frame 203 above the first support block 205.

[0053] In this embodiment, at the initial moment, the central axis of the yarn centering mechanism coincides with the central axis of the three-dimensional braiding machine 1. When the yarn centering mechanism completes the centering and fixes the center position of the yarn, the yarn centering mechanism returns to the initial position, and the three-dimensional braiding machine 1 starts weaving. At the same time, the first cylinder 202 is ejected, and the first lifting frame 203 slides upward, so that the central axis of the support groove 2051 coincides with the central axis of the three-dimensional braiding machine 1. When the core mold assembly 3 is ejected, the support groove 2051 can support the front end of the three-dimensional braid and the front end of the core mold assembly 3, which not only avoids the yarn centering mechanism affecting the front end movement of the three-dimensional braid and the core 302, but also effectively reduces the vertical load of the robot arm 301.

[0054] See also Figure 4 , Figure 5 and Figure 6 , the yarn centering mechanism includes a first electric cylinder 206, a circular mounting plate 207, a second guide rail module 208, a positioning plate 209, an elastic module and a sliding module;

[0055] The first electric cylinder 206 is mounted on the first lifting frame 203 above the first supporting block 205. The telescopic direction of the first electric cylinder 206 is the same as the axial direction of the three-dimensional knitting machine 1. The circular mounting plate 207 is mounted on the telescopic end of the first electric cylinder 206. A second guide rail module 208 for guiding the horizontal sliding of the circular mounting plate 207 is also provided between the first lifting frame 203 and the circular mounting plate 207.

[0056] The positioning plate 209 is arranged parallel to the circular mounting plate 207, and the center axes of the positioning plate 209 and the circular mounting plate 207 coincide with the axis of the three-dimensional knitting machine 1. The circular mounting plate 207 and the positioning plate 209 are connected through an elastic module. The positioning plate 209 is located on the side of the circular mounting plate 207 away from the first electric cylinder 206. A plurality of sliding modules are installed on the circular mounting plate 207, and the plurality of sliding modules are arranged in an equiangular array along the center of the circular mounting plate 207.

[0057] See also Figure 4 and Figure 5 , the elastic module includes a guide rod 210 and a spring 211;

[0058] One end of the guide rod 210 is fixedly connected to the end face of the positioning plate 209 close to the circular mounting plate 207, and the other end of the guide rod 210 is slidably guided with the circular mounting plate 207. The spring 211 is sleeved on the outer wall of the guide rod 210, and the two ends of the spring 211 are respectively mounted on the circular mounting plate 207 and the positioning plate 209.

[0059] See also Figure 1 , Figure 2 and Figure 3 , the sliding module includes a second electric cylinder 212, a third guide rail module 213 and a positioning column 214;

[0060] The second electric cylinder 212 and the third guide rail module 213 are both mounted on the circular mounting plate 207, one end of the positioning column 214 is mounted on the slider of the third guide rail module 213, the axis of the positioning column 214 is perpendicular to the end surface of the circular mounting plate 207, the telescopic end of the second electric cylinder 212 is fixedly connected to the slider of the third guide rail module 213, and the telescopic direction of the second electric cylinder 212 passes through the central axis of the circular mounting plate 207;

[0061] The positioning plate 209 is provided with an elongated hole 2091 , and the other end of the positioning column 214 passes through the elongated hole 2091 . The other end of the positioning column 214 is provided with a first guiding angle 2141 .

[0062] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 The centering assembly includes a positioning cylinder 215, and a mounting hole 2071 is opened at the center of the circular mounting plate 207, and the positioning cylinder 215 is installed in the mounting hole 2071;

[0063] A plurality of positioning grooves 2151 are provided on the side wall of the positioning cylinder 215 close to one end of the positioning plate 209. The plurality of positioning grooves 2151 are arranged in an array with equal angles along the center of the positioning cylinder 215. The number of the positioning grooves 2151 is the same as the number of the sliding modules. The two side walls of the positioning grooves 2151 are both provided with second guiding bevels 2152.

[0064] Define the center position of the circular mounting plate 207 as the coordinate origin, a plurality of sliding modules are sequentially rotated m degrees from the positive direction of X, and a plurality of positioning grooves 2151 are sequentially rotated m degrees from the axis at an angle of m / 2 degrees;

[0065] The center of the positioning plate 209 is provided with an escape hole 2092 for escaping the positioning tube 215 . When the spring 211 is in a free state, the end of the positioning tube 215 close to the positioning plate 209 does not extend out of the end surface of the positioning plate 209 away from the circular mounting plate 207 .

[0066] In this embodiment, the number of sliding modules and positioning grooves 2151 are both 6 groups. The sliding modules are rotated 60° in sequence starting from the positive direction of X, and the positioning grooves 2151 are rotated 60° in sequence starting from 30°. Through the above settings, the yarn between the two positioning columns 214 is just located at the front end of the positioning groove 2151, which is convenient for the positioning groove 2151 to clamp the yarn.

[0067] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 A delivery pipeline 401 for delivering adhesive is installed in the positioning cylinder 215, and an adhesive nozzle 402 is installed at one end of the delivery pipeline 401 close to the positioning plate 209, and the other end of the delivery pipeline 401 is connected to an adhesive pumping assembly (not shown in the figure).

[0068] In this embodiment, by arranging the delivery pipeline 401 and the adhesive nozzle 402 in the positioning cylinder 215, it is ensured that the adhesive can be accurately sprayed to the center position after centering, and it can also prevent the adhesive from spraying out of the positioning cylinder 215 and adhering to the positioning column 214, thereby affecting the positioning accuracy of the positioning column 214.

[0069] In this embodiment, the specific steps of centering and fixing the yarn are:

[0070] S2-1: At the initial moment, the positioning posts 214 all slide to one end away from the central axis of the circular mounting plate 207, and the first electric cylinder 206 drives the circular mounting plate 207, the positioning plate 209 and the positioning posts 214 to move forward, and the front end of the positioning posts 214 passes through the three-dimensional knitting machine 1 to divide the yarn into 6 areas;

[0071] S2-2: Start the second electric cylinder 212 to push the positioning column 214 to move close to the central axis of the circular mounting plate 207, while the first electric cylinder 206 continues to extend, and the positioning plate 209 pushes the yarn to the same plane, so as to facilitate the fixing of the yarn sprayed with adhesive;

[0072] S2-3: The first electric cylinder 206 continues to extend, and the spring 211 is compressed under the obstruction of the yarn, and the front end of the positioning cylinder 215 extends out of the end surface of the positioning plate 209 close to one side of the three-dimensional knitting machine 1, and the yarn enters the positioning groove 2151 under the guidance of the second guide bevel 2152 and is clamped;

[0073] S2-4: The adhesive nozzle 402 sprays the adhesive to the center of the yarn to fix the center of the yarn;

[0074] S2-5: After the yarn positioning and fixing are completed, the centering component returns to the initial position.

[0075] See also Figure 1 , Figure 2 and Figure 3 , a transverse caster module 501 and a longitudinal caster module 502 are installed at the bottom end of the first mounting frame 201;

[0076] The mounting platform of the first mounting frame 201 is provided with a transverse slide groove 503 and a longitudinal slide groove 504, the transverse caster module 501 can slide along the transverse slide groove 503, and the longitudinal caster module 502 can slide along the longitudinal slide groove 504;

[0077] During weaving, the first mounting frame 201 is mounted to a predetermined position via the fixing plate 505 .

[0078] In this embodiment, in order to fully release the production capacity of the three-dimensional braiding machine 1, the first mounting frame 201 is designed as a removable and detachable module, and the first mounting frame 201 is fixed at a predetermined position by a fixing plate 505 to center and fix the yarn mainly used for the start of braiding. When it is necessary to produce other products, the fixing plate 505 is removed, and the first mounting frame 201 is moved to the longitudinal slide groove 504 on one side by the transverse caster module 501 and the transverse slide groove 503, and then the first mounting frame 201 is moved along the longitudinal slide groove 504 to make room for the space on one side of the three-dimensional braiding machine 1, so as to facilitate the installation and production of other equipment.

[0079] See also Figure 1 , the core assembly 3 includes a mechanical arm 301 and a core 302;

[0080] The mechanical arm 301 is disposed at the other side of the three-dimensional knitting machine 1 , and the mold core 302 is installed at the moving end of the mechanical arm 301 .

[0081] In this embodiment, when the three-dimensional braiding machine 1 completes the weaving of the sealing structure, the robot arm 301 pushes the core mold 302 to move toward the side close to the three-dimensional braiding machine 1, and the core mold 302 pushes the sealing structure to move. The three-dimensional braiding machine 1 continues to weave the side wall of the three-dimensional braided fabric until the side wall of the three-dimensional braided fabric reaches a predetermined length and the weaving is completed.

[0082] In summary, the present invention connects the yarn of the i-th winding spindle 101 of the three-dimensional weaving machine 1 with the yarn of the i+N-th winding spindle 101, and centers and fixes N yarns through the centering component 2, thereby realizing the weaving of a three-dimensional braided fabric with one end sealed, thereby expanding the application field of three-dimensional weaving and providing high structural strength of the braided fabric.

[0083] 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. A device for manufacturing a three-dimensional braided fabric with one end sealed, comprising a three-dimensional braiding machine, wherein 2N winding spindles are arranged in sequence on the inner circumference of the three-dimensional braiding machine, and the 2N winding spindles are numbered from 1 to 2N in sequence, characterized in that: The yarn of the i-th winding spindle is connected to the yarn of the i+N-th winding spindle, where: 1≤i≤N; One side of the three-dimensional braiding machine is also provided with a centering component for centering and fixing the N connected yarns, and the other side of the three-dimensional braiding machine is provided with a core component for shaping during braiding; The centering assembly includes a first mounting frame, a first cylinder, a first lifting frame, a first guide rail module, a first support block, a support groove and a yarn centering mechanism; The first mounting frame is arranged at one side of the three-dimensional braiding machine, the first cylinder extending in the vertical direction is installed on the side wall of the first mounting frame close to the three-dimensional braiding machine, the bottom end of the first lifting frame is fixedly connected to the top end of the first cylinder, and a first guide rail module for guiding the vertical sliding of the first lifting frame is also arranged between the first lifting frame and the first mounting frame; A first support block is installed on the crossbeam at the bottom end of the first lifting frame, and a support groove is provided on the first support block for supporting the braided fabric and the core assembly during weaving, and a yarn centering mechanism for centering the N connected yarns is installed on the first lifting frame above the first support block; The yarn centering mechanism comprises a first electric cylinder, a circular mounting plate, a second guide rail module, a positioning plate, an elastic module and a sliding module; The first electric cylinder is mounted on a first lifting frame above the first supporting block, the telescopic direction of the first electric cylinder is the same as the axial direction of the three-dimensional knitting machine, and the circular mounting plate is mounted on the telescopic end of the first electric cylinder; a second guide rail module for guiding the horizontal sliding of the circular mounting plate is also provided between the first lifting frame and the circular mounting plate; The positioning plate is arranged parallel to the circular mounting plate, and the center axes of the positioning plate and the circular mounting plate coincide with the axis of the three-dimensional knitting machine. The circular mounting plate and the positioning plate are connected by an elastic module. The positioning plate is located on the side of the circular mounting plate away from the first electric cylinder. A plurality of sliding modules are installed on the circular mounting plate, and the plurality of sliding modules are arranged in an equiangular array along the center of the circular mounting plate.

2. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 1, characterized in that: The elastic module includes a guide rod and a spring; One end of the guide rod is fixedly connected to the end surface of the positioning plate close to the circular mounting plate, and the other end of the guide rod is slidably guided with the circular mounting plate. The spring is sleeved on the outer wall of the guide rod, and the two ends of the spring are respectively mounted on the circular mounting plate and the positioning plate.

3. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 2, characterized in that: The sliding module includes a second electric cylinder, a third guide rail module and a positioning column; The second electric cylinder and the third guide rail module are both mounted on the circular mounting plate, one end of the positioning column is mounted on the slider of the third guide rail module, the axis of the positioning column is perpendicular to the end surface of the circular mounting plate, the telescopic end of the second electric cylinder is fixedly connected to the slider of the third guide rail module, and the telescopic direction of the second electric cylinder passes through the central axis of the circular mounting plate; The positioning plate is provided with an elongated hole, the other end of the positioning column passes through the elongated hole, and the other end of the positioning column is provided with a first guiding angle.

4. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 3, characterized in that: The centering assembly also includes a positioning cylinder, a mounting hole is opened at the center of the circular mounting plate, and the positioning cylinder is installed in the mounting hole; A plurality of positioning grooves are provided on the side wall of the positioning cylinder close to one end of the positioning plate. The plurality of positioning grooves are arranged in an array with equal angles along the center of the positioning cylinder. The number of the positioning grooves is the same as the number of the sliding modules. The two side walls of the positioning grooves are both provided with a second guiding bevel. Define the center position of the circular mounting plate as the coordinate origin, and set a plurality of sliding modules by rotating m degrees in sequence from the positive direction of X, and set a plurality of positioning grooves by rotating m degrees in sequence from the axis at an angle of m / 2 degrees; The center of the positioning plate is provided with an escape hole for escaping the positioning tube. When the spring is in a free state, the end of the positioning tube close to the positioning plate does not extend out of the end surface of the positioning plate away from the circular mounting plate.

5. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 4, characterized in that: A delivery pipeline for delivering adhesive is installed in the positioning cylinder, an adhesive nozzle is installed at one end of the delivery pipeline close to the positioning plate, and the other end of the delivery pipeline is connected to the adhesive pumping component.

6. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 5, characterized in that: A transverse caster module and a longitudinal caster module are installed at the bottom end of the first mounting frame; The mounting platform of the first mounting frame is provided with a transverse sliding groove and a longitudinal sliding groove, the transverse caster module can slide along the transverse sliding groove, and the longitudinal caster module can slide along the longitudinal sliding groove; During weaving, the first mounting frame is mounted to a predetermined position via a fixing plate.

7. A device for manufacturing a three-dimensional braided fabric with one end sealed as claimed in claim 6, characterized in that: The core assembly includes a mechanical arm and a core; The mechanical arm is arranged at the other side of the three-dimensional braiding machine, and the mold core is installed at the moving end of the mechanical arm.

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