Woven equipment and method for making a double-end closed loop dense mesh stent

Abstract

The application provides a braiding device and a braiding method for manufacturing a double-head closed-loop dense net support. The braiding device comprises a rotating disc, a spindle assembly with a plurality of spindles, the spindle assembly being mounted on the rotating disc, the plurality of spindles being arranged in sequence along the circumference of the rotating disc, every two spindles being symmetrical about the center of the rotating disc, and any two symmetrical spindles being used for sleeving a braiding ring so that the centers of all the braiding rings intersect at the center of the rotating disc; and a braiding core rod coaxially arranged with the rotating disc, the braiding core rod being movable in the axial direction of the rotating disc, the braiding core rod penetrating the center intersection area of the braiding ring and making the center intersection area located at a braiding starting point of the braiding core rod, and the braiding core rod tensioning all the braiding rings at the braiding starting point. The braiding device can braiding the double-head closed-loop dense net support on the braiding core rod at one time through the movement of all the spindles along the circumference of the rotating disc and the movement of the braiding core rod along the axial direction of the rotating disc, thereby effectively reducing the manufacturing difficulty of the double-head closed-loop dense net support and improving the manufacturing yield.

Description

Weaving equipment and manufacturing method for double-headed closed-loop dense mesh support Technical Field

[0001] This invention relates to the field of medical devices, specifically to a weaving device and manufacturing method for a double-headed closed-loop dense mesh stent, and the double-headed closed-loop dense mesh stent itself. Background Technology

[0002] Intracranial aneurysms are abnormal bulges that occur on the walls of intracranial arteries. They are the leading cause of subarachnoid hemorrhage and, among cerebrovascular accidents, the third leading cause after cerebral thrombosis and hypertensive intracerebral hemorrhage. They can occur at any age, but are most common between 40 and 60 years of age. The exact cause of intracranial aneurysms is unclear, but most scholars believe they arise from congenital defects in the walls of intracranial arteries and increased intraluminal pressure. Hypertension, cerebral arteriosclerosis, and vasculitis are associated with the occurrence and development of aneurysms. Intracranial aneurysms most commonly occur on the circle of arteries at the base of the brain, with 80% occurring in the anterior half of the circle of arteries.

[0003] Currently, the treatment of intracranial aneurysms mainly focuses on surgical clipping, endovascular interventional therapy, and intra-aneurysmal embolization. Surgical clipping is highly invasive, has many side effects, and causes significant pain for patients. Studies have shown that 85% of narrow-necked aneurysms can be completely occluded, while only 15% of wide-necked aneurysms can be completely occluded. For the endovascular treatment of complex and giant aneurysms, the biggest concern is the inability to achieve dense occlusion and the risk of aneurysm recurrence. The concept of using endovascular stents or stent-like methods to remodel the carrier artery within the aneurysm was proposed in the late 1980s and began clinical application 15 years ago. Flow-directing stents, also known as dense mesh stents, are a new treatment method. Their biggest difference from previous methods is that they do not require filling the aneurysm sac with a large number of coils, or even any coils at all. Instead, a single stent covers the aneurysm neck, isolating the aneurysm from the blood flow in the external blood vessels, thus preventing aneurysm rupture and bleeding.

[0004] Most existing blood flow guiding mesh stents have an open-loop head structure. Even those with closed-loop head structures often employ a back-braided design at the ends. While back-braiding the braided threads can improve the performance of the mesh stent, it significantly increases the manufacturing difficulty and reduces the yield rate. It also increases the complexity of the braided mandrel structure and processing, and introduces the possibility of wire-joining points (where two braided threads at the ends are joined together and fixed), which increases the risk of connection failure.

[0005] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To solve at least one of the above-mentioned technical problems, the present invention proposes a weaving device and manufacturing method for a double-headed closed-loop dense mesh support, and a double-headed closed-loop dense mesh support.

[0007] According to one aspect of the present invention, a weaving apparatus for manufacturing a double-headed closed-loop dense mesh support is provided, comprising:

[0008] Turntable;

[0009] A spindle assembly having multiple spindles is mounted on the turntable. The spindles are arranged sequentially along the circumference of the turntable, and every two spindles are symmetrical about the center of the turntable. Any two symmetrical spindles are used to fit a braided loop, such that the centers of all the braided loops converge at the center of the turntable; and...

[0010] A braided mandrel is coaxially arranged with the turntable. The braided mandrel is movable in the axial direction of the turntable. The braided mandrel is used to pass through the central intersection area of ​​the braided loops, and the central intersection area is located at the braiding start point of the braided mandrel. The braided mandrel can tension all the braided loops at the braiding start point.

[0011] The weaving equipment is configured to weave a double-headed closed-loop dense mesh support on the weaving mandrel in one go by the circumferential movement of all the spindles along the turntable and the axial movement of the weaving mandrel along the turntable, wherein the dense mesh support has ≥10 mesh openings per square millimeter.

[0012] Optionally, the braiding mandrel is a dumbbell-shaped structure with large diameters at both ends and a small diameter in the middle, and the braiding starting point is set at one end of the braiding mandrel; the braiding device is also configured to braid a double-headed closed-loop dense mesh support with flared ends on the braiding mandrel in one go through the dumbbell-shaped structure.

[0013] Optionally, the braiding mandrel is provided with an annular fixing notch at the braiding starting point, the fixing notch being used to tension all the braided loops.

[0014] Optionally, each spindle remains relatively stationary with respect to the turntable, all spindles are arranged on the same circumference and uniformly distributed along the circumference of the turntable, any two symmetrical spindles are used to fit a braided loop, and the turntable is used to drive all the spindles to move along the circumference of the turntable by rotating itself.

[0015] Optionally, any two symmetrical spindles are used to fit two braided rings. Each spindle is capable of moving circumferentially and radially along the turntable. While moving circumferentially along the turntable, each spindle can switch back and forth between the inner and outer rings. One of any two adjacent spindles is located in the inner ring, and the other is located in the outer ring. The inner ring, the outer ring, and the turntable are concentrically arranged.

[0016] Optionally, the turntable is provided with a curved annular track, which is concentrically arranged with the turntable. The annular track has staggered crests and troughs, all of which define the inner ring and all of which define the outer ring. All of the spindles are confined within the annular track.

[0017] Optionally, the weaving device further includes a plurality of dials, the number of which is the same as the number of spindles. The plurality of dials are arranged sequentially along the circumference of the turntable, and the positions of the spindles correspond to the positions of the dials. The dials can rotate relative to the turntable to drive a corresponding spindle to move along the annular track, or all the spindles can move along the annular track along with the rotation of the turntable.

[0018] Optionally, the dial has four grooves evenly arranged along its circumference. The grooves can hold the outer periphery of the spindle, and after two adjacent dials rotate in the same direction, the two grooves of the two adjacent dials can surround and limit the spindle.

[0019] Optionally, the groove is semi-circular.

[0020] Optionally, the spindle includes a spindle body, a pulley, and a slide bar. The spindle body is connected to the turntable. One end of the slide bar is mounted on the spindle body. The slide bar is arranged parallel to the braiding mandrel. The pulley is rotatably mounted on the slide bar and can move along the axial direction of the slide bar. Two symmetrical spindles are fitted with the braiding ring through the pulley.

[0021] Optionally, the spindle further includes an elastic structure disposed on the slide bar, one end of the elastic structure being connected to the slide bar, and the other end of the elastic structure being connected to the axle of the pulley.

[0022] Optionally, the spindle includes one or two pulleys, one pulley for mounting one of the braided rings, and two pulleys for mounting one of the braided rings respectively.

[0023] Optionally, the spindle assembly and the turntable form a spindle module, and the spindle module is detachably mounted on the weaving equipment.

[0024] Optionally, the weaving device includes a plurality of first-type spindle modules for pressing one and picking one, wherein the number of spindles in the plurality of first-type spindle modules is different, and / or, the weaving device includes a plurality of second-type spindle modules for pressing two and picking two, wherein the plurality of second-type spindle modules all use the weaving process, and the number of spindles in the plurality of second-type spindle modules is different.

[0025] According to another aspect of the present invention, a method for manufacturing a double-headed closed-loop dense mesh support is also provided, which is implemented by the weaving equipment for manufacturing a double-headed closed-loop dense mesh support as described in any one of the claims, the method comprising:

[0026] Provides multiple braided loops made of braided yarn;

[0027] Each of the braided loops is placed on two symmetrical spindles, so that the centers of all the braided loops meet at the center of the turntable;

[0028] The braiding mandrel passes through the central intersection area of ​​the braided loops and is positioned at the braiding start point of the braiding mandrel, where the braiding mandrel tensions all the braided loops.

[0029] During weaving, all the spindles are driven to move circumferentially along the turntable, while the weaving mandrel is driven to move forward of the spindle assembly along the axis of the turntable, thereby weaving a double-headed closed-loop dense mesh support on the weaving mandrel in one go, wherein the number of mesh holes per square millimeter of the dense mesh support is ≥10.

[0030] Optionally, the braided mandrel is a dumbbell-shaped structure with large diameters at both ends and a small diameter in the middle, and the braiding starting point is located at one end of the braided mandrel. The manufacturing method further includes:

[0031] During the process of driving the braiding mandrel to move forward toward the spindle assembly, a double-headed closed-loop dense mesh support with flared ends is woven in one go on the braiding mandrel.

[0032] Optionally, the spindles remain relatively stationary with respect to the turntable, and all the spindles are arranged on the same circumference and evenly distributed along the circumference of the turntable. When making the double-headed closed-loop dense mesh support, only one weaving ring is fitted on any two symmetrical spindles. During weaving, the turntable is driven to rotate, and the rotation of the turntable drives all the spindles to move along the circumference of the turntable, thereby completing the one-press-one-pick weaving process.

[0033] Optionally, one of any two adjacent spindles is set in the inner ring concentric with the turntable, and the other is set in the outer ring concentric with the turntable. When making the double-headed closed-loop dense mesh support, two braiding rings are fitted on any two symmetrical spindles. During weaving, each spindle is driven to move along the circumference and radial direction of the turntable, so that each spindle switches back and forth between the inner ring and the outer ring, thereby completing the two-press and two-pick weaving process.

[0034] Optionally, at least a portion of the braided loops are made of developable braided yarns.

[0035] Optionally, the developable braided yarn includes reinforcing developing yarn and composite core yarn, at least one of the braided loops is made of the reinforcing developing yarn, and all the remaining braided loops are made of the composite core yarn, thereby forming the double-headed closed-loop dense mesh support by mixing the reinforcing developing yarn and the composite core yarn.

[0036] According to another aspect of the present invention, a double-headed closed-loop dense mesh support is also provided, which is prepared by the weaving equipment for making a double-headed closed-loop dense mesh support as described in any one of the claims.

[0037] The weaving device for manufacturing a double-headed closed-loop dense mesh support provided by the present invention includes: a turntable; a spindle assembly having multiple spindles, the spindle assembly being mounted on the turntable, the multiple spindles being arranged sequentially along the circumference of the turntable, each pair of spindles being symmetrical about the center of the turntable, any two symmetrical spindles being used to fit a weaving ring, such that the centers of all the weaving rings converge at the center of the turntable; and a weaving mandrel coaxially arranged with the turntable, the weaving mandrel being movable in the axial direction of the turntable, the weaving mandrel being used to pass through the central convergence area of ​​all the weaving rings, such that the central convergence area is located at the weaving starting point of the weaving mandrel, the weaving mandrel being able to tension all the weaving rings at the weaving starting point; the weaving device is configured to weave a double-headed closed-loop dense mesh support in one go on the weaving mandrel by the movement of all the spindles along the circumference of the turntable and the movement of the weaving mandrel along the axial direction of the turntable, wherein the number of mesh openings per square millimeter of the dense mesh support is ≥10.

[0038] By applying the weaving equipment provided by this invention, a double-headed closed-loop dense mesh stent can be woven in one go during the weaving process, thus eliminating the need for cutting and re-weaving after stent weaving. This avoids large fluctuations in stent size due to different cutting methods or stent deformation caused by improper assembly of heat treatment molds. It also effectively reduces the manufacturing difficulty of the double-headed closed-loop dense mesh stent and improves the manufacturing yield and efficiency. Furthermore, it avoids the need for setting up wire-jointing points, reducing the risk of wire-jointing point connection failure. At the same time, it simplifies the structure and processing complexity of the braided mandrel, reducing manufacturing costs. The obtained double-headed closed-loop dense mesh stent avoids the problem of thrombosis and stent disarray caused by sharp stent tips, which can affect stent performance.

[0039] Since the manufacturing method and the double-headed closed-loop dense mesh support provided by this invention belong to the same inventive concept as the weaving equipment for manufacturing the double-headed closed-loop dense mesh support provided by this invention, the manufacturing method and the double-headed closed-loop dense mesh support provided by this invention have all the advantages of the weaving equipment for manufacturing the double-headed closed-loop dense mesh support provided by this invention. Therefore, the beneficial effects of the manufacturing method and the double-headed closed-loop dense mesh support provided by this invention will not be described in detail here. Attached Figure Description

[0040] The accompanying drawings provided in this invention are not necessarily drawn to scale, and some parts and structures are enlarged for clarity. Variations of the illustrated embodiments can be considered. Therefore, the description of various aspects and elements of the embodiments in the drawings is not intended to limit the scope of the invention. In the drawings:

[0041] Figure 1 is a schematic diagram of the overall structure of the weaving device provided according to an embodiment of the present invention;

[0042] Figure 2 is a partial structural schematic diagram of a single spindle provided according to an embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of the structure of a braided mandrel provided according to an embodiment of the present invention;

[0044] Figure 4 is a structural schematic diagram of a double-headed closed-loop dense mesh support provided according to an embodiment of the present invention;

[0045] Figure 5 is a diagram of a weaving process with one sinking and one floating according to an embodiment of the present invention;

[0046] Figure 6 is a diagram of the 2-sinking and 2-floating weaving process provided according to an embodiment of the present invention;

[0047] Figure 7 is a schematic diagram of the structural principle of the 1 sinking and 1 floating weaving provided according to Embodiment 1 of the present invention, wherein there are 24 weaving filaments;

[0048] Figure 8 is a schematic diagram of the structural principle of the 1 sinking and 1 floating weaving provided according to Embodiment 2 of the present invention, wherein there are 32 weaving filaments;

[0049] Figure 9 is a partial structural enlarged view of the weaving device provided according to Embodiment 3 of the present invention;

[0050] Figure 10 is a motion trajectory diagram of a single spindle during 2 sinking and 2 floating weaving according to Embodiment 3 of the present invention. The two circles drawn by the dotted line represent two circumferences of different diameters, representing the inner circle and the outer circle respectively. The dotted line, which is similar to a wavy line, represents the motion trajectory of the spindle.

[0051] Figure 11 is a schematic diagram of the structure of a turntable with a ring track during 2-sinking and 2-floating weaving according to Embodiment 3 of the present invention.

[0052] In the attached image:

[0053] 100-Weaving equipment; 110-Turntable; 111-Center hole; 112-Circular track; 112a-Crest; 112b-Trough; 120-Chuck; 130-Spindle assembly; 131-Spindle; 1311-Spindle body; 1312-Pulley; 1313-Slide rod; 1314-Slide groove; 1315-Elastic structure; 150-Weaving mandrel; 151-Fixing notch; 170-Base; 190-Dial plate; 191-Groove; 10-Double-head closed-loop dense mesh support; 11-Weaving ring; 12-Reinforcing developing yarn; 13-Composite core yarn; 14-Flare mouth. Detailed Implementation

[0054] Various exemplary embodiments will be described below. These examples are non-limiting and should be understood as illustrating aspects of the broader application of the apparatus, system, and method. These embodiments can be varied and substituted with equivalents without departing from the true spirit and scope of the invention. Furthermore, various variations can be made to adapt to specific circumstances, materials, material compositions, processes, processing actions, or steps to suit the purpose, spirit, or scope of the invention. All such variations will be within the scope of protection of this invention.

[0055] Any dimensions described in the overview or detailed description are merely examples and are not intended to limit the subject matter of the invention, unless set forth in various exemplary embodiments. Furthermore, the various structures of the embodiments described herein will complement each other rather than be purely alternate, unless stated otherwise. In other words, structures from one embodiment can be freely combined with structures from other embodiments, as readily apparent to those skilled in the art, unless stated otherwise for substitution purposes only.

[0056] In this application, "proximal end" generally refers to the end closest to the operator of the double-headed closed-loop dense mesh support, while "distal end," in contrast to "proximal end," refers to the end furthest from the operator. In this application, "axial" refers to the direction parallel to the axis of the corresponding structure; "circumferential" refers to the direction around the axis of the corresponding structure; and "radial" refers to the direction perpendicular to the axis.

[0057] The following description, in conjunction with specific embodiments, will be provided. Unless otherwise specified, the following embodiments and features can complement or combine with each other.

[0058] Referring to Figures 1 to 3, this application embodiment provides a weaving device 100 (hereinafter referred to as weaving device 100) for fabricating a double-headed closed-loop dense mesh support. The weaving device 100 includes a turntable 110 and a spindle assembly 130 mounted on the turntable 110. The spindle assembly 130 includes a plurality of spindles 131, which are arranged sequentially around the center of the turntable 110 along the circumference of the turntable 110, and every two spindles 131 are symmetrical about the center of the turntable 110. The weaving device 100 also includes a weaving mandrel 150 coaxially arranged with the turntable 110, which can pass through the central hole 111 of the turntable 110 and move relative to the turntable 110 in the axial direction.

[0059] Referring to Figure 4, this application embodiment also provides a double-headed closed-loop mesh stent 10, which is manufactured by the weaving device 100 provided in the embodiment. The double-headed closed-loop mesh stent 10 provided in this application has ≥10 mesh openings per square millimeter. Both ends of the double-headed closed-loop mesh stent 10 along its own axis are closed-loop structures, which allows for a non-invasive design at each end of the double-headed closed-loop mesh stent 10, eliminating the problem of exposed braided wires at the ends. However, the double-headed closed-loop mesh stent 10 involved in this application can have various uses, and is not limited thereto. It is mostly used in endovascular treatment, including but not limited to the treatment of intracranial aneurysms. The double-headed closed-loop mesh stent 10 is a hollow mesh tube structure formed by cross-woven braided wires.

[0060] In one weaving method, referring to Figure 5, the weaving device 100 provided in the embodiment can realize one sinking and one floating (i.e., pressing and picking up one) weaving, that is, one of two adjacent warp threads a is picked up by the weft thread b, while the other warp thread a is pressed down by the weft thread b, and this method is repeated.

[0061] In another weaving method, referring to Figure 6, the weaving device 100 provided in the embodiment can realize 2 sinking and 2 floating (i.e., pressing two and picking two) weaving, that is, every two warp yarns a form a group, and every two weft yarns b form a group. The two warp yarns a in one group of warp yarns are picked up by the two weft yarns b in one group of weft yarns, while the two warp yarns a in another group of warp yarns are pressed down by the two weft yarns b in one group of weft yarns. This method is repeated to weave.

[0062] The weaving equipment 100 provided in this application can complete at least one weaving process of 1 sinking and 1 floating or 2 sinking and 2 floating.

[0063] In the weaving device 100 provided in this embodiment, the number of spindles 131 is consistent with the number of braiding wires in the double-headed closed-loop dense mesh support 10. Those skilled in the art can understand the specific number of braiding wires in the double-headed closed-loop dense mesh support 10 based on existing technology. Existing braiding wires are generally no less than 24, such as 24, 32, 48, 64, or more, and typically no less than 48, such as 48 to 144, but are not limited thereto.

[0064] In this configuration, any two symmetrical spindles 131 are used to mount at least one braiding ring 11 (see Figures 7 and 8). For example, in a 1-sink, 1-float braiding process, only one braiding ring 11 is mounted on any two symmetrical spindles 131, while in a 2-sink, 2-float braiding process, two braiding rings 11 are mounted on any two symmetrical spindles 131. After all the braiding rings 11 are mounted on each pair of spindles 131, all the braiding rings 11 converge at the center of the turntable 110.

[0065] Figures 7 and 8 both illustrate a 1-sink, 1-float weaving method. Using this 1-sink, 1-float weaving as an example, every two weaving threads (which can be composed of single strands or multiple strands wound together) form a weaving loop 11. Each weaving loop 11 is fitted onto two symmetrical spindles 131, with one weaving loop 11 mounted on each spindle 131. Eventually, the centers of all the weaving loops 11 on all the spindles 131 converge at the center of the turntable 110, thus arranging all the weaving loops 11 circumferentially. Then, the weaving mandrel 150 is passed through the central convergence area of ​​the weaving loops 11, ensuring that this area is precisely located at the weaving starting point of the mandrel 110. The mandrel 150 is then tensioned (including secured) at the weaving starting point, ensuring that all the weaving loops 11 are taut at this point. Before weaving, the weaving starting point is generally set at the center of the turntable 110.

[0066] Understandably, regardless of whether the weaving is 1 sink and 1 float or 2 sink and 2 float, the weaving equipment 100 provided in the embodiment can weave a double-headed closed-loop dense net support 10 in one go on the weaving mandrel 150 by moving all the spindles 131 around the turntable 110 and moving the weaving mandrel 150 along the turntable 100 axially.

[0067] It should be understood that during the sinking and floating weaving process, the spindle 131 only needs to move circumferentially along the turntable 110 as the turntable 110 rotates. Specifically, each spindle 131 remains relatively stationary with respect to the turntable 110, and all spindles 131 are arranged on the same circumference. Any two symmetrical spindles 131 are fitted with only one weaving ring 11. Thus, the weaving device 100 drives all spindles 131 to move circumferentially along the turntable 110 through the rotation of the turntable 110, thereby completing the one-press-one-pick weaving process. Therefore, during the sinking and floating weaving process, while driving the turntable 110 to rotate, the weaving mandrel 150 is also driven to move in front of the spindle assembly 130, ultimately causing all weaving rings 11 to rotate and weave in a sinking and floating manner on the weaving mandrel 150, resulting in a double-headed closed-loop dense mesh support 10 with a certain length in the axial direction. In the weaving process of sinking and floating, all spindles 131 are preferably evenly arranged around the circumference of the turntable 110 to achieve uniform weaving.

[0068] It should also be understood that in the 2-sink, 2-float weaving process, any two symmetrical spindles 131 are fitted with two weaving rings 11, and each spindle 131 can move circumferentially and radially along the turntable 110. While moving circumferentially along the turntable 110, each spindle 131 can switch back and forth between the inner and outer rings. One of any two adjacent spindles 131 is located in the inner ring, and the other in the outer ring. The inner and outer rings are concentrically arranged with the turntable 110, with the inner ring located within the outer ring. More specifically, during weaving, each spindle 131 is driven to move circumferentially along the turntable 110, and while moving circumferentially along the turntable 110, each spindle 131 switches back and forth between the inner and outer rings, thus completing the 2-press, 2-pick weaving process. The inner and outer circles here can be understood as the movement trajectories of spindles 131. Each spindle 131 can move to the circumference of the inner circle and also to the circumference of the outer circle, thus switching back and forth between different circumferences. During the 2-sinking and 2-floating weaving process, spindles 131 need to move both circumferentially and radially along turntable 110 to achieve staggered movement of spindles 131. At the same time, the weaving mandrel 150 moves in front of the spindle assembly 130 (i.e., facing the spindle assembly 130), ultimately causing all the weaving rings 11 to rotate and weave in a 2-sinking and 2-floating manner on the weaving mandrel 150, resulting in a double-headed closed-loop dense mesh support 10 with a certain length in the axial direction.

[0069] In this way, by using the weaving equipment 100 provided in the application embodiment, a double-headed closed-loop dense mesh stent 10 can be woven in one go during the weaving process, thereby eliminating the need for cutting and re-weaving after stent weaving. This can avoid large fluctuations in stent size due to different cutting methods or stent deformation due to improper assembly of heat treatment molds. It can also effectively reduce the manufacturing difficulty of the double-headed closed-loop dense mesh stent and improve the manufacturing yield and efficiency. It can also avoid the setting of yarn-jointing points, reducing the risk of yarn-jointing point connection failure. At the same time, it simplifies the structure and processing complexity of the braided mandrel and reduces the manufacturing cost. The obtained double-headed closed-loop dense mesh stent 100 avoids the problem of thrombosis and stent scattering caused by the sharp stent tip, which affects the stent performance.

[0070] Understandably, weaving begins from the starting point, and a double-headed closed-loop dense mesh support 10 of a certain length is formed by the movement of the weaving mandrel 150. After weaving is completed, the end closed loop is removed from the spindle 131, and then the weaving mandrel 150 with the double-headed closed-loop dense mesh support 10 is heat-treated for shaping. Heat treatment is usually completed in a heat treatment mold. The weaving mandrel 150 with the double-headed closed-loop dense mesh support 10 is placed into the heat treatment mold, and after heat treatment, the double-headed closed-loop dense mesh support 10 is removed from the weaving mandrel 150. Furthermore, during the weaving process, the mesh density of the support can be controlled by adjusting the moving speed of the weaving mandrel 150, such as achieving weaving of sparse and dense sections or achieving uniform density weaving.

[0071] As shown in Figure 3, the braiding mandrel 150 can be provided with an annular fixing notch 151 at the braiding starting point, and the central intersection area of ​​the braided loops 11 is located at the fixing notch 151. The fixing notch 151 is used to tension (including fix) all the braided loops 11 that are passed through by the braiding mandrel 150. The fixing notch 151 is also used as the braiding starting point. The function of the braiding mandrel 150 is not only to fix all the braided loops 11 through the fixing notch 151, but also to adjust the tension of the braided yarn by moving the braiding mandrel 150 back and forth, and to realize axial braiding by moving the braiding mandrel 150. Finally, the fixing notch 151 is used to achieve closed loop and control the braiding length.

[0072] As shown in Figure 3, the braiding mandrel 150 is preferably a dumbbell-shaped structure with large diameters at both ends and a small diameter in the middle. The braiding starting point is set at one end of the braiding mandrel 150. Thus, the braiding equipment 100 provided in this embodiment can also use the dumbbell-shaped braiding mandrel 150 to braid a double-headed closed-loop dense mesh support 10 with flared ends 14 in one go. The dumbbell-shaped braiding mandrel 150 allows the braiding equipment 100 to form the flared ends 14 of the double-headed closed-loop dense mesh support 10 along the axial direction in one go during the braiding process (see Figure 4), further reducing the manufacturing difficulty of forming the flared ends of the double-headed closed-loop dense mesh support 10. Therefore, the braiding mandrel 150 provided in this embodiment is structurally different from traditional braiding mandrels. This braiding mandrel 150 can not only realize the double-headed closed-loop braiding of the support, but also form the flared ends 14 in one go, effectively simplifying the structure and processing complexity of the braiding mandrel 150. Preferably, at least one end of the double-headed closed-loop mesh stent 10 is configured as a flared opening 14 in the axial direction, and the diameter of the flared opening 14 is larger than the diameter of the middle section of the double-headed closed-loop mesh stent 10. If the flared opening 14 is configured only at one end of the double-headed closed-loop mesh stent 10 in the axial direction, it is preferable to configure the flared opening 14 at the proximal end. The configuration of the flared opening 14 can improve the wall adhesion and anchoring performance of the double-headed closed-loop mesh stent 10 in the blood vessel.

[0073] Referring to Figure 2 and in conjunction with Figure 9, in this embodiment, the spindle 131 may include a spindle body 1311, a pulley 1312, and a sliding rod 1313. The spindle body 1311 is connected to the turntable 110. One end of the sliding rod 1313 is mounted on the spindle body 1311, specifically, one end of the sliding rod 1313 may be mounted on the end of the spindle body 1311 away from the turntable 110. The sliding rod 1313 is arranged parallel to the braiding mandrel 150. The pulley 1312 is rotatably mounted on the sliding rod 1313 and is capable of moving along the axial direction of the sliding rod 1313, preferably along the groove 1314 of the sliding rod 1313. Two symmetrical spindles 131 are fitted with braided rings 11 by the pulley 1312. One pulley 1312 may fit one or two braided rings 11, or two braided rings 11 may be fitted by two coaxial pulleys 1312. Understandably, during the weaving process, the length of each weaving loop 11 will gradually shorten, and correspondingly, the pulley 1312 needs to gradually move outward (that is, in the direction away from the spindle body 1311).

[0074] Preferably, the spindle 131 further includes an elastic structure 1315, which is disposed on the slide bar 1313, such as inside and / or outside the slide bar 1313. One end of the elastic structure 1315 is connected to the slide bar 1313, and the other end is connected to (including abutting against) the axle of the pulley 1312. One end of the elastic structure 1315 may be connected to the end of the slide bar 1313 away from the fixed end. The elastic structure 1315 includes, but is not limited to, springs (there may be one or more springs), and other elastic structures that can achieve substantially the same effect may also be used. The function of the elastic structure 1315 is to release tension when the support is woven to the end to prevent the problem of yarn breakage due to insufficient yarn length, and the elastic structure 1315 can provide resistance to allow the yarn on the pulley 1312 to be released slowly, ensuring that the yarn is always in a taut state. During the weaving process, the elastic structure 1315 is deformed under pressure to provide elastic force to the pulley 1312.

[0075] Furthermore, the weaving equipment 100 provided in the embodiment can produce a double-headed closed-loop dense mesh support 10 with good overall developability, so that the double-headed closed-loop dense mesh support 10 has good developability along the axial and / or circumferential directions. Specifically, the double-headed closed-loop dense mesh support 10 is formed by weaving with developable braiding yarns. Preferably, at least some of the braiding yarns in the double-headed closed-loop dense mesh support 10 are developable braiding yarns.

[0076] In one embodiment, the double-headed closed-loop mesh support 10 is woven from developable braided yarns (such as composite core yarns, DFT). In another embodiment, the double-headed closed-loop mesh support 10 is woven from a mixture of non-developable and developable braided yarns. When the double-headed closed-loop mesh support 10 is woven from developable braided yarns, it is preferable that the developable braided yarns include reinforcing developable yarns 12, which improve the developing performance of the double-headed closed-loop mesh support 10. As shown in FIG5, the double-headed closed-loop mesh support 10 is preferably woven from a mixture of reinforcing developable yarns 12 and composite core yarns (DFT) 13, wherein only one reinforcing developable yarn 12 is required, and all other braided yarns are composite core yarns 13. The reinforcing developable yarn 12 has stronger developing properties than the composite core yarn 13.

[0077] Understandably, the composite core wire 13 consists of a developable core wire and a sleeve encasing the developable core wire. The material of the developable core wire includes, but is not limited to, one of platinum, iridium, gold, silver, tantalum, and tungsten or an alloy thereof. The material of the sleeve includes, but is not limited to, one or more combinations of nickel-titanium alloy, nickel-titanium alloy, stainless steel, cobalt-chromium alloy, and nickel-cobalt alloy. The reinforcing developing wire 12 consists of a non-developable core wire and a developable core wire wound around the non-developable core wire. Taking a nickel-titanium core wire as an example and a platinum-iridium alloy wire as an example, the platinum-iridium alloy wire is simply wound around the nickel-titanium core wire to form the reinforcing developing wire 12 (coil), and then the reinforcing developing wire 12 is fixed into a braided loop 11. The fixing method here can be welding or bonding.

[0078] As shown in Figure 4, the enhancing developing wire 12 is spirally distributed along the axis of the double-headed closed-loop mesh support 10, which makes the double-headed closed-loop mesh support 10 have better developing properties in both the axial and circumferential directions. If the enhancing developing wire 12 is removed and unfolded separately, the enhancing developing wire 12 is actually a continuous braided loop 11 (closed loop).

[0079] This application does not limit the structure for driving the movement of the braiding mandrel 150; there are multiple ways to drive it, and at least one can be selected. An illustrative description follows. One end of the braiding mandrel 150 (e.g., the end corresponding to the setting of the braiding start point) can be clamped by a chuck (see Figure 1, not labeled), which drives the braiding mandrel 150 to move forward toward the spindle assembly 130. The chuck can be positioned at the front B of the spindle assembly 130. This application can provide multiple replaceable chucks to accommodate braiding mandrels 150 of different diameters. A platform (see Figure 1) can be provided below the chuck, and a slide rail can be provided on the platform to guide the movement of the chuck.

[0080] The turntable 110 and the spindle assembly 130 preferably form a spindle module, which is detachably mounted on the weaving equipment 100, such as on the base 170 of the weaving equipment 100. In this case, different weaving densities or different weaving processes can be achieved by replacing different spindle modules. With this setup, only key components need to be replaced, without the need to add a weaving machine, effectively saving equipment costs.

[0081] In one embodiment, the weaving device 100 provided in the embodiment includes a plurality of first-type spindle modules for pressing and picking one spindle at a time. The number of spindles 131 in the plurality of first-type spindle modules is different. In this case, different weaving densities are achieved by changing different first-type spindle modules. For example, the weaving device 100 provided in the embodiment can be configured with multiple first-type spindle modules such as 24 heads, 32 heads, 48 ​​heads, and 64 heads. Different weaving densities are achieved by changing first-type spindle modules with different numbers of heads. For example, when a double-headed closed-loop dense mesh support 10 with a lower weaving density is required, a 24-head or 32-head spindle module can be selected; when a double-headed closed-loop dense mesh support 10 with a higher weaving density is required, a 48-head or 64-head spindle module can be selected; of course, other numbers of spindle modules can also be selected, and this application does not limit this. And / or, the weaving device 100 provided in the embodiment includes a plurality of second-type spindle modules for pressing two and picking two, and the number of spindles 131 in the plurality of second-type spindle modules is different. Similarly, weaving with different weaving densities can be achieved by replacing different second-type spindle modules.

[0082] The following describes in further detail the usage of the weaving device 100 provided in the embodiments, with reference to specific examples.

[0083] Example 1

[0084] Referring to Figure 7, in the weaving device 100 provided in Embodiment 1 of this application, the spindle assembly 130 includes 24 spindles 131. These 24 spindles can be combined with the turntable 110 to form a spindle module of the first type. The 24 spindles 131 are evenly arranged around the circumference of the turntable 110. Each spindle 131 remains relatively stationary with respect to the turntable 110. Only one weaving ring 11 is fitted on every two symmetrical spindles 131. The centers of all weaving rings 11 converge at the fixing notch 151 of the weaving mandrel 150.

[0085] During weaving, the turntable 110 is driven to rotate clockwise in the direction indicated by arrow A in the figure, while the weaving mandrel 150 is driven to move in front of the 24 spindles 131, thereby weaving a double-headed closed-loop dense mesh support 10 with flared ends on the weaving mandrel 150 in one go. This double-headed closed-loop dense mesh support 10 is woven from 24 filaments. In particular, one of the 12 weaving loops 11 is made of reinforcing developing yarn 12, and all the other weaving loops 11 are made of composite core yarn 13.

[0086] When it is necessary to weave a double-headed closed-loop dense mesh support 10 with other densities, spindle assemblies 130 with 24, 32, 48, or 64 or more heads can be selected. For example, it is only necessary to replace other spindle modules of the first type and install the replacement spindle modules on the weaving equipment 100. Then, clamp one end of the weaving mandrel 150. After that, install the weaving rings 11 on the spindles 131 and insert them into the fixing recesses 151 of the weaving mandrel 150. Then, adjust the axial movement of the weaving mandrel 150 to make all the weaving rings 11 tensioned. Finally, rotate the turntable 110 and move the weaving mandrel 150.

[0087]

Example 2

[0088] Referring to Figure 8, in the weaving device 100 provided in Embodiment 2 of this application, the spindle assembly 130 includes 32 spindles 131, which can be combined with the turntable 110 to form a spindle module of the first type. The 32 spindles 131 are evenly arranged along the circumference of the turntable 110, and each spindle 131 remains relatively stationary with respect to the turntable 110. Only one weaving ring 11 is fitted on every two centrally symmetrical spindles 131, and the centers of all weaving rings 11 converge at the fixing notch 151 of the weaving mandrel 150.

[0089] During weaving, the turntable 110 is driven to rotate clockwise in the direction indicated by arrow A in the figure, while the weaving mandrel 150 is driven to move forward of the 32 spindles 131, thereby weaving a double-headed closed-loop dense mesh support 10 with flared ends on the weaving mandrel 150 in one go. This double-headed closed-loop dense mesh support 10 is woven from 32 filaments. In particular, one of the 16 weaving loops 11 is made of reinforcing developing yarn 12, and all the other weaving loops 11 are made of composite core yarn 13.

[0090] Similarly, when it is necessary to weave a double-headed closed-loop dense mesh support 10 of other densities, a spindle assembly 130 with 24, 48, or 64 or more heads can be selected. For example, it is only necessary to replace other spindle modules of the first type and install the replacement spindle module on the weaving equipment 100. Then, clamp one end of the weaving mandrel 150. After that, install the weaving ring 11 on the spindle 131 and insert it into the fixing recess 151 of the weaving mandrel 150. Then, adjust the axial movement of the weaving mandrel 150 to make all the weaving rings 11 tensioned. Finally, rotate the turntable 110 and move the weaving mandrel 150.

[0091]

Example 3

[0092] Referring to Figures 9 to 11, unlike Embodiment 1 and Embodiment 2, the weaving device 100 provided in Embodiment 3 of this application is used to realize two-to-two weaving.

[0093] As shown in Figures 10 and 11, a wave-shaped annular track 112 can be set on the turntable 110. The annular track 112 is concentrically set with the turntable 110. The annular track 112 has wave crests 112a and wave troughs 112b. All wave troughs 112b define an inner circle (i.e., an inner circle), and all wave crests 112a define an outer circle (i.e., an outer circle). All spindles 131 are confined in the annular track 112, so that the spindles 131 can only move along the wave-shaped annular track 112. This also makes one of two adjacent spindles 131 located at the wave crest 112a of the annular track 112, and the other located at the wave trough 112b of the annular track 112, forming an alternating motion.

[0094] In one embodiment, as shown in FIG9, the weaving device 100 provided in Embodiment 3 further includes a plurality of dials 190, the number of which is the same as the number of spindles 131. The plurality of dials 190 are arranged sequentially along the circumference of the turntable 110, and the positions of the spindles 131 correspond to the positions of the dials 190. Each dial 190 can rotate relative to the turntable 110, driving a corresponding spindle 131 to move along the annular track 112 and reach the next position. Each 90° rotation of the dial 190 drives the spindle 131 at that position to move from a crest 112a to a trough 112b, or from a trough 112b to a crest 112a. Of course, in other embodiments, the dials 190 can be omitted, allowing all spindles 131 to move along the annular track 112 along with the rotation of the turntable 110, thus achieving both circumferential and radial movement of the spindles 131 along the turntable 110. The structures of each dial 190 may be the same or different.

[0095] As shown in Figure 9, the dial 190 has four grooves 191 evenly arranged along its circumference. The grooves 191 are used to hold the outer periphery of the spindle 131, and adjacent dials 190 need to rotate in the same direction. After rotating in the same direction, the two grooves 190 of the two adjacent dials 190 can surround and limit the same spindle 131. The surrounded spindle 131 can then be moved to the next position by the corresponding dial 190. The grooves 191 can have any suitable shape, including but not limited to the semi-circular arc shape shown in the figure.

[0096] Furthermore, this application also provides a method for manufacturing a double-headed closed-loop dense mesh support, implemented based on the weaving device 100 provided in any of the above embodiments, the manufacturing method comprising:

[0097] Provides multiple braided loops made of braided yarn;

[0098] Each of the braided loops is placed on two symmetrical spindles, so that the centers of all the braided loops meet at the center of the turntable;

[0099] Pass the braiding mandrel through the central intersection area of ​​the braided loops and set the central intersection area at the braiding start point of the braiding mandrel. Tensile all braided loops at the braiding start point of the braiding mandrel.

[0100] During weaving, all spindles are driven to move circumferentially along the turntable, while the weaving mandrel is driven to move forward of the spindle assembly along the axis of the turntable. Thus, a double-headed closed-loop dense mesh support is woven on the weaving mandrel in one go, and the number of mesh holes per square millimeter of the dense mesh support is ≥10.

[0101] Furthermore, the manufacturing method also includes:

[0102] During the process of driving the braiding mandrel to move forward towards the spindle assembly, a double-headed closed-loop dense mesh support with flared ends is woven in one go on the braiding mandrel.

[0103] Furthermore, when the weaving equipment completes the one-on-one pressing and picking weaving, the manufacturing method also includes:

[0104] The turntable is driven to rotate, and through the rotation of the turntable, all the spindles move along the circumference of the turntable, thus completing the weaving process of pressing one and picking one.

[0105] Furthermore, when the weaving process of pressing two and picking two is completed by the weaving equipment, the manufacturing method further includes:

[0106] The spindles are driven to move circumferentially and radially along the turntable, so that they switch back and forth between the inner and outer circles, thereby completing the weaving process of pressing two and picking two.

[0107] Furthermore, in the manufacturing method, at least some of the braided loops are made of developable braided yarns. More specifically, the developable braided yarns include reinforcing developable yarns and composite core yarns. At least one braided loop is made of reinforcing developable yarns, and all the remaining braided loops are made of composite core yarns. Thus, the reinforcing developable yarns and composite core yarns are mixed and woven together to form a double-headed closed-loop dense mesh support.

[0108] Furthermore, this application also provides a double-headed closed-loop dense mesh support, which is manufactured by the weaving device 100 provided in any of the above embodiments.

[0109] It should be noted that, based on the above disclosure in this application, those skilled in the art should be able to understand that the length of each braided ring can be set according to actual needs, and should also be able to understand the relative positional relationship of each braided ring after it is fitted on the spindle to achieve one-on-one or two-on-two pressing, which will not be elaborated here.

[0110] In summary, the technical solution provided in this application enables the one-time weaving of a double-headed closed-loop mesh stent during the weaving process, thus eliminating the need for post-weaving cutting and re-weaving. This avoids significant stent size fluctuations due to different cutting methods or stent deformation caused by improper heat treatment mold assembly. It also effectively reduces the manufacturing difficulty of the double-headed closed-loop mesh stent, improves manufacturing yield and efficiency, eliminates the need for twin-wire connection points, reduces the risk of twin-wire connection failure, simplifies the structure and processing complexity of the braiding mandrel, and reduces manufacturing costs. Furthermore, the obtained double-headed closed-loop mesh stent avoids the problem of thrombosis and stent disarray caused by sharp stent tips, which could affect stent performance. Moreover, a double-headed closed-loop mesh stent with flared ends can be woven in one step during the weaving process using the braiding mandrel, further reducing the manufacturing difficulty of flared stents.

[0111] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0112] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the scope of protection of the present invention.

[0113] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0114] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A weaving device for manufacturing a double-headed closed-loop dense mesh support, characterized in that, include: Turntable; A spindle assembly comprising multiple spindles mounted on a turntable, the spindles being arranged sequentially along the circumference of the turntable, each pair of spindles being symmetrical about the center of the turntable, any two symmetrical spindles being used to fit a braided loop such that the centers of all the braided loops converge at the center of the turntable; and a braided mandrel coaxially arranged with the turntable, the braided mandrel being movable in the axial direction of the turntable, the braided mandrel being used to pass through the central convergence area of ​​the braided loops, such that the central convergence area is located at the braiding starting point of the braided mandrel, the braided mandrel being able to tension all the braided loops at the braiding starting point; the braiding device is configured to, through the movement of all the spindles along the circumference of the turntable and the movement of the braided mandrel along the axial direction of the turntable, weave a double-headed closed-loop dense mesh support in one pass on the braided mandrel, the dense mesh support having ≥10 mesh openings per square millimeter.

2. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1, characterized in that, The braided core rod is a dumbbell-shaped structure with large diameters at both ends and a small diameter in the middle. The braiding starting point is set at one end of the braided core rod. The braiding device is also configured to braid a double-headed closed-loop dense mesh support with flared ends on the braided core rod in one go through the dumbbell-shaped structure.

3. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1 or 2, characterized in that, The braiding mandrel has an annular fixing notch at the starting point of the braiding, and the fixing notch is used to tension all the braided loops.

4. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1 or 2, characterized in that, Each spindle remains relatively stationary with respect to the turntable. All spindles are arranged on the same circumference and uniformly distributed along the circumference of the turntable. Any two symmetrical spindles are used to fit a braided loop. The turntable is used to drive all spindles to move along the circumference of the turntable by rotating itself.

5. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1 or 2, characterized in that, Any two symmetrical spindles are used to fit two braided rings. Each spindle can move circumferentially and radially along the turntable. While moving circumferentially along the turntable, each spindle can switch back and forth between the inner and outer rings. One of any two adjacent spindles is located in the inner ring and the other is located in the outer ring. The inner ring, the outer ring, and the turntable are concentrically arranged.

6. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 5, characterized in that, The turntable is provided with a wave-shaped circular track, which is concentric with the turntable. The circular track has staggered crests and troughs, with all the troughs defining the inner ring and all the crests defining the outer ring. All the spindles are confined within the circular track.

7. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 6, characterized in that, The weaving device also includes multiple dials, the number of which is the same as the number of spindles. The multiple dials are arranged sequentially along the circumference of the turntable. The position of the spindle corresponds to the position of the dial. The dial can rotate relative to the turntable to drive a corresponding spindle to move along the annular track, or all the spindles can move along the annular track along with the rotation of the turntable.

8. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 7, characterized in that, The dial has four grooves evenly arranged along its circumference. The grooves can hold the outer periphery of the spindle, and when two adjacent dials rotate in the same direction, the two grooves of the two adjacent dials can surround and limit the spindle.

9. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 8, characterized in that, The groove is semi-circular.

10. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1 or 2, characterized in that, The spindle includes a spindle body, a pulley, and a sliding rod. The spindle body is connected to the turntable. One end of the sliding rod is mounted on the spindle body. The sliding rod is arranged parallel to the braiding mandrel. The pulley is rotatably mounted on the sliding rod and can move along the axial direction of the sliding rod. Two symmetrical spindles are fitted with the braiding ring through the pulley.

11. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 10, characterized in that, The spindle also includes an elastic structure disposed on the slide bar, one end of the elastic structure being connected to the slide bar, and the other end of the elastic structure being connected to the axle of the pulley.

12. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 10, characterized in that, The spindle includes one or two pulleys, one pulley for mounting one of the braided rings, and two pulleys for mounting one of the braided rings respectively.

13. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 1 or 2, characterized in that, The spindle assembly and the turntable form a spindle module, which is detachably mounted on the weaving equipment.

14. The weaving equipment for manufacturing a double-headed closed-loop dense mesh support according to claim 13, characterized in that, The weaving equipment includes multiple first-type spindle modules for pressing one and picking one, wherein the number of spindles in the multiple first-type spindle modules is different, and / or, the weaving equipment includes multiple second-type spindle modules for pressing two and picking two, wherein the multiple second-type spindle modules all use the weaving process, and the number of spindles in the multiple second-type spindle modules is different.

15. A method for manufacturing a double-headed closed-loop dense mesh support, characterized in that, The manufacturing process is achieved by a weaving device for producing a double-headed closed-loop dense mesh support as described in any one of claims 1-14. The manufacturing method includes: providing a plurality of weaving loops made of weaving yarn; placing each of the weaving loops onto two symmetrical spindles, such that the centers of all the weaving loops converge at the center of a turntable; passing a weaving mandrel through the central convergence area of ​​the weaving loops and setting the central convergence area at the weaving starting point of the weaving mandrel, wherein the weaving mandrel tensions all the weaving loops at the weaving starting point; during weaving, driving all the spindles to move circumferentially along the turntable, while simultaneously driving the weaving mandrel to move axially along the turntable toward the front of the spindle assembly, thereby weaving a double-headed closed-loop dense mesh support in one go on the weaving mandrel, wherein the number of mesh openings per square millimeter of the dense mesh support is ≥10.

16. The method for manufacturing a double-headed closed-loop dense mesh support according to claim 15, characterized in that, The braided core rod is a dumbbell-shaped structure with large diameters at both ends and a small diameter in the middle. The braiding starting point is set at one end of the braided core rod. The manufacturing method further includes: during the process of driving the braided core rod to move forward of the spindle assembly, a double-headed closed-loop dense mesh support with flared ends is braided on the braided core rod in one go.

17. The method for manufacturing a double-headed closed-loop dense mesh support according to claim 15, characterized in that, The spindles remain relatively stationary with respect to the turntable. All the spindles are arranged on the same circumference and evenly distributed along the circumference of the turntable. When making the double-headed closed-loop dense mesh support, only one weaving ring is fitted on any two symmetrical spindles. During weaving, the turntable is driven to rotate. The rotation of the turntable drives all the spindles to move along the circumference of the turntable, thereby completing the one-press-one-pick weaving process.

18. The method for manufacturing a double-headed closed-loop dense mesh support according to claim 15, characterized in that, One of any two adjacent spindles is set in the inner ring concentric with the turntable, and the other is set in the outer ring concentric with the turntable. When making the double-headed closed-loop dense mesh support, two braiding rings are fitted on any two symmetrical spindles. During weaving, each spindle is driven to move along the circumference and radial direction of the turntable, so that each spindle switches back and forth between the inner ring and the outer ring, thereby completing the two-press and two-pick weaving process.

19. The method for manufacturing a double-headed closed-loop dense mesh support according to claim 15, characterized in that, At least a portion of the braided loops are made of developable braided yarns.

20. The method for manufacturing a double-headed closed-loop dense mesh support according to claim 19, characterized in that, The developable braided yarn includes reinforcing developing yarn and composite core yarn. At least one of the braided loops is made of the reinforcing developing yarn, and all the remaining braided loops are made of the composite core yarn. The double-headed closed-loop dense mesh support is formed by weaving the reinforcing developing yarn and the composite core yarn together.

21. A double-headed closed-loop dense mesh support, characterized in that, It is prepared by the weaving equipment for making double-headed closed-loop dense mesh supports as described in any one of claims 1-14.

Images