Stent preparation equipment and stent preparation method

Abstract

The invention provides stent preparation equipment and a stent preparation method. The support preparation equipment comprises a bearing frame; the knitting tool is rotatably arranged on the bearing frame and can rotate in the first direction, and a plurality of positioning protrusions arranged according to a preset mode are arranged on the peripheral face of the knitting tool; the feeding mechanism is movably arranged on the bearing frame and comprises a feeding pipe, the feeding pipe can move in the second direction, the first direction and the second direction are parallel, the interior of the feeding pipe is used for raw material wires to pass through, and the bottom end of the feeding pipe is used for stretching into the positioning protrusions; during weaving, the raw material yarn is in a tensioned state, one end of the raw material yarn is connected with the discharging equipment, the other end of the raw material yarn penetrates through the feeding pipe and then is fixed to the weaving tool, and while the weaving tool rotates, the feeding pipe moves and pulls the raw material yarn to be attached to the outer circumferential face of the weaving tool to bypass the positioning protrusions. And then the self-expanding stent with the preset shape and size is prepared, and the consistency and stability of the stent are good.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a stent preparation device and a stent preparation method. Background Technology

[0002] With the improvement of people's living standards, significant changes have occurred in dietary structure and lifestyle, leading to an increasing incidence of vascular diseases. To avoid the high intraoperative and postoperative risks associated with traditional surgery, vascular stents have become the most widely used minimally invasive interventional medical device. This technique requires a small-diameter stent to be inserted into a delivery system, delivered to the target location, and then the stent expands to the required larger diameter to conform to the inner surface of the body's vascular system.

[0003] Currently, vascular stents are divided into balloon-expandable stents and self-expanding stents. Balloon-expandable stents are pre-installed in a compressed state on a balloon at the distal end of the catheter, expanding by inflating the balloon. These stents are typically made of cobalt-based alloys or stainless steel. Self-expanding stents are pressed into a delivery sheath and expand independently using their material properties (shape memory). These stents are typically made of nickel-titanium alloys, and their fabrication methods include nickel-titanium alloy tube cutting and nickel-titanium wire braiding. In peripheral vascular interventional therapy, self-expanding stents are the most widely used due to their advantages such as low implantation shortening rate, high release accuracy, strong radial support, and good flexibility. However, the consistency and stability of self-expanding stents fabricated using current processes still need improvement, and the fabrication process is relatively complex and costly.

[0004] It should be noted that the information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application, 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

[0005] The purpose of this invention is to provide a stent preparation device and a stent preparation method, which can easily and efficiently prepare self-expanding stents with good consistency and stability, and can also flexibly adjust the stent waveform according to actual needs to improve stent performance.

[0006] To achieve the above objectives, the present invention provides a stent fabrication apparatus comprising:

[0007] Support frame;

[0008] A weaving fixture rotatably mounted on the supporting frame, the weaving fixture being capable of rotating about a first direction defined by its own central axis, and the outer peripheral surface of the weaving fixture having a plurality of positioning protrusions arranged in a predetermined manner; and,

[0009] A feeding mechanism movably mounted on the support frame includes a feeding tube that is movable along a second direction parallel to the first direction. The interior of the feeding tube is used to pass raw material filaments, and the bottom end of the feeding tube is used to extend into the positioning protrusions.

[0010] During weaving, the raw material yarn is always under tension. One end of the raw material yarn is connected to the feeding device, and the other end of the raw material yarn passes through the feeding tube and is fixed on the weaving fixture. While the weaving fixture rotates, the feeding tube moves and pulls the raw material yarn extending from the bottom end to conform to the outer circumference of the weaving fixture and wrap around the positioning protrusions, thereby producing a self-expanding bracket with a preset shape and size.

[0011] Optionally, in the above-mentioned bracket preparation equipment, a plurality of the positioning protrusions are arranged in multiple rows along the circumference of the braiding fixture and in multiple columns along the axial direction of the braiding fixture. The axial positions of the positioning protrusions in different rows are the same or different, and the circumferential positions of the positioning protrusions in different columns are the same or different. All the positioning protrusions have the same shape and size.

[0012] Optionally, in the above-mentioned bracket manufacturing equipment, the feeding tube can be deflected relative to the braiding fixture to adjust the angle;

[0013] The feeding mechanism further includes a movable slider, the top end of the feeding tube is connected to the movable slider, the movable slider is movably disposed on the crossbeam of the supporting frame, the crossbeam extends along the second direction, and the movable slider clamps and fixes the top end of the feeding tube.

[0014] Optionally, in the above-mentioned bracket preparation equipment, the bottom end of the feeding pipe constitutes a feeding section, and the feeding pipe further includes a main body section. The main body section and the feeding section are arranged along the axial direction of the feeding pipe. The outer diameter of the feeding section is smaller than the outer diameter of the main body section, and the outer diameter of the feeding section is also smaller than the distance between the positioning protrusions. A tapered transition section is provided between the feeding section and the main body section.

[0015] Optionally, in the above-mentioned support fabrication equipment, the supporting frame includes a first bracket, a second bracket, a crossbeam, and a base; the first bracket and the second bracket are independently arranged;

[0016] The first bracket includes two first bracket bodies arranged opposite each other; the bottoms of the two first bracket bodies are fixed to the base; both ends of the crossbeam are fixed to the two first bracket bodies; the feeding mechanism is movably arranged on the crossbeam;

[0017] The second bracket includes two second bracket bodies arranged opposite each other; the bottoms of the two second bracket bodies are fixed to the base; the two ends of the weaving fixture are rotatably disposed on the tops of the two second bracket bodies; the top of each second bracket body engages with the outer peripheral surface of the weaving fixture, so that the weaving fixture can rotate around the first direction and restrict the axial movement of the weaving fixture along the first direction.

[0018] Optionally, in the above-mentioned bracket manufacturing equipment, at least one of the second bracket bodies is provided with a stop device at its top, which is used to prevent the weaving fixture from rotating when needed.

[0019] Optionally, in the above-mentioned bracket preparation equipment, the stopping device includes a fixed seat, which is rotatably disposed on the top of the second bracket body. The fixed seat is provided with a threaded hole for inserting a bolt, which is used to abut against the braiding fixture to prevent the braiding fixture from rotating.

[0020] Optionally, in the above-mentioned bracket manufacturing equipment, the braiding fixture includes a first support section, a braiding section, and a second support section arranged sequentially along the axial direction; the positioning protrusion is only provided on the braiding section; the first support section and the second support section are rotatably disposed on the bearing frame; the first support section, the braiding section, and the second support section are integrally formed, or the first support section, the braiding section, and the second support section are connected as one unit by an internal mandrel.

[0021] Optionally, in the above-mentioned bracket preparation equipment, the feeding mechanism is manually driven or motor driven, and the weaving fixture is manually driven or motor driven.

[0022] Furthermore, based on the same inventive concept, the present invention also provides a method for fabricating a stent, employing any of the stent fabrication devices described in the present invention, and the stent fabrication method includes:

[0023] During weaving, the raw yarn on the feeding device is pulled out and passed through the feeding tube and then fixed to the weaving fixture;

[0024] The raw material yarn is brought into a tensioned state, which in turn drives the weaving fixture to rotate and the feeding tube to move. During the movement of the feeding tube, the raw material yarn is pulled out from the bottom and fits against the outer circumference of the weaving fixture, winding around the positioning protrusions until a self-expanding bracket with a preset shape and size is produced.

[0025] The bracket fabrication equipment described above includes: a support frame; a weaving fixture rotatably mounted on the support frame, the weaving fixture being able to rotate about a first direction defined by its own central axis, and a plurality of positioning protrusions arranged in a predetermined manner on the outer peripheral surface of the weaving fixture; and a feeding mechanism movably mounted on the support frame, the feeding mechanism including a feeding tube, the feeding tube being able to move along a second direction parallel to the first direction, the interior of the feeding tube being used to pass raw material filaments, and the bottom end of the feeding tube being used to extend into the space between the positioning protrusions; during weaving, the raw material filaments are always in a taut state, one end of the raw material filaments is connected to a feeding device, and the other end of the raw material filaments passes through the feeding tube and is fixed on the weaving fixture, and while the weaving fixture rotates, the feeding tube moves and pulls the raw material filaments extending from the bottom end to conform to the outer peripheral surface of the weaving fixture and circulate between the positioning protrusions, thereby fabricating a self-expanding bracket with a preset shape and size.

[0026] With this configuration, the self-expanding stent can be prepared by the cooperation of the weaving tooling and the feeding mechanism. This preparation method can produce self-expanding stents with good consistency and stability in a simple and efficient manner. In addition, this self-expanding stent has good compliance, can be compressed, stretched, and bent in various ways, and can better complete vascular interventional treatment. In particular, it can better adapt to interventional treatment of complex blood vessels and can show strong advantages in vascular tortuosity and curvature.

[0027] Since the stent preparation method and the stent preparation equipment provided by this invention belong to the same inventive concept, the stent preparation method provided by this invention has at least all the beneficial effects of the stent preparation equipment provided by this invention. Therefore, the beneficial effects of the stent preparation method provided by this invention will not be described in detail here. Attached Figure Description

[0028] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the embodiments of this application and to illustrate the implementation of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application.

[0029] Figure 1 This is a schematic diagram of the overall structure of a stent fabrication device according to an embodiment of the present invention; wherein the stent fabrication device is operated entirely manually;

[0030] Figure 2 This is a structural diagram of a crossbeam with a solid structure according to an embodiment of the present invention;

[0031] Figure 3This is a schematic diagram of the structure of a feeding tube provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a movable slider provided in an embodiment of the present invention; wherein, the movable slider is used to achieve shaft hole engagement with the crossbeam through a sliding groove, and the shape of the sliding groove matches the cross-sectional shape of the crossbeam;

[0033] Figure 5 This is a schematic diagram of the structure of a limiting block provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of a first bracket body with a one-piece design provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of a first support segment or a second support segment provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of a rotating handle provided in an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of a base provided in an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of a second bracket body provided in an embodiment of the present invention; wherein, Figure 10 (a) is a schematic diagram of the second bracket without a stop mechanism. Figure 10 (b) is a schematic diagram of the second bracket with a stop device. Figure 10 (c) is a schematic diagram of the structure of the second bracket with rolling bearings;

[0039] Figure 11 This is a schematic diagram of the structure of a braided segment provided in an embodiment of the present invention;

[0040] Figure 12 This is a partially enlarged structural diagram of a braiding fixture that rotates while the feeding tube moves according to an embodiment of the present invention.

[0041] Figure 13 This is a schematic diagram of the overall structure of a stent fabrication device according to another embodiment of the present invention; wherein the stent fabrication device is a semi-automatic operation;

[0042] Figure 14 This is a schematic diagram of the structure of a self-expanding stent provided in an embodiment of the present invention;

[0043] Figure 15 This is a schematic diagram illustrating the arrangement of positioning protrusions and the weaving process according to an embodiment of the present invention; wherein, Figure 15(a) is a partial structural diagram of the positioning protrusions arranged in a predetermined manner. Figure 15 (b) is in accordance with Figure 15 A partial structural diagram of the arrangement of the positioning protrusions in (a) during weaving. Figure 15 (c) is according to Figure 15 (b) The final braided support waveform;

[0044] Figure 16 This is a schematic diagram illustrating the arrangement of positioning protrusions and the weaving process according to another embodiment of the present invention; wherein, Figure 16 (a) is a partial structural diagram of the positioning protrusions arranged in a predetermined manner. Figure 16 (b) is in accordance with Figure 16 A partial structural diagram of the arrangement of the positioning protrusions in (a) during weaving. Figure 16 (c) is according to Figure 16 (b) Waveform diagram of the final braided support;

[0045] Figure 17 This is a schematic diagram of the structure of a movable slider provided in another embodiment of the present invention; wherein the movable slider is used to engage with the concave and convex parts of a crossbeam;

[0046] Figure 18 A schematic diagram of a hollow crossbeam provided in another embodiment of the present invention; wherein the crossbeam is provided with a T-shaped groove extending through the length direction;

[0047] Figure 19 This is a schematic diagram of the structure of the crossbeam and the movable slider in a concave-convex fit according to another embodiment of the present invention;

[0048] Figure 20 A schematic diagram of a two-section design for the first bracket body provided in another embodiment of the present invention.

[0049] [The reference numerals in the attached figures are explained below]:

[0050] 10-Raw material wire; 20-Self-expanding bracket; 21-Wave ring; 100-Bearing frame; 101-First bracket; 1011-First bracket body; 10111-Crossbeam mounting hole; 10112-Limit block mounting hole; 102-Second bracket; 1021-Second bracket body; 10211-Mounting groove; 1022-Fixed seat; 10221-Threaded hole; 1023-Rolling bearing; 103-Crossbeam; 1031-T-slot; 104-Base; 1041-First bracket mounting hole; 1042-Second bracket mounting hole; 105-Limit block; 1051-Bolt mounting hole; 200 - Weaving fixture; 2001- First support section; 2002- Weaving section; 2003- Second support section; 2004- Mandrel; 2005- Raw material yarn fixing hole; 201- Positioning protrusion; 202- Rotating handle; 300- Feeding mechanism; 301- Feeding tube; 3011- Bottom end; 3012- Main body section; 3013- Conical transition section; 302- Moving slider; 3021- Sliding groove; 3022- Tightening groove; 3023- Clamping channel; 3024- Tightening through hole; 3025- T-shaped protrusion; 303- Sliding handle; a- Inner hole; b- Handle connecting hole; c- Annular groove. Detailed Implementation

[0051] The purpose of this invention is to provide a stent preparation device and a stent preparation method, which can easily and efficiently prepare self-expanding stents (also known as vascular stents) with good consistency and stability, and can flexibly adjust the stent waveform according to actual needs to improve stent performance.

[0052] The stent fabrication apparatus and method proposed in this invention will be further described in detail below with reference to the accompanying drawings. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention. It should be understood that relative terms such as "above," "below," "top," "bottom," and "over" shown in the drawings can be used to describe the relationships between various elements. These relative terms are intended to cover different orientations of elements other than those depicted in the drawings. For example, if the device is inverted relative to the view in the drawings, an element described, for example, as being "above" another element will now be below that element.

[0053] For ease of description, the technical terms used in this article are explained. As those skilled in the art will understand, vascular stents are roughly cylindrical in shape. If they are considered as cylinders, their cylindrical axis of rotation is defined as the "axial direction"; "radial direction" is perpendicular to the "axial direction", that is, the direction of the radius or diameter of the cylinder's end face circle, and the radial direction is spatially perpendicular to the axial direction; "circumferential direction" is the circumferential direction, which, together with the "axial direction" and "radial direction", forms the three orthogonal directions of the cylindrical coordinate system.

[0054] Figure 1 and Figure 13 This is a schematic diagram of the overall structure of the scaffold fabrication device provided in some embodiments of the present invention. For example... Figure 1 and Figure 13 As shown, the support fabrication equipment includes: a support frame 100; a weaving fixture 200; and a feeding mechanism 300. The weaving fixture 200 is rotatably mounted on the support frame 100 and can rotate about a first direction defined by its central axis, primarily horizontal. Furthermore, the feeding mechanism 300 is movably mounted on the support frame 100 and includes a feeding tube 301, which can move along a second direction parallel to but not coinciding with the first direction. The feeding tube 301 is located above the weaving fixture 200. Therefore, during weaving, the weaving fixture 200 is rotated while the feeding tube 301 is moved. Through the cooperation of the feeding tube 301 and the weaving fixture 200, a self-expanding support 20 with a preset shape and size is fabricated on the weaving fixture 200. See details below. Figure 14 .

[0055] like Figure 14 As shown, the self-expanding support 20 prepared by the present invention includes several wave rings 21, each of which can be regarded as a coil. All wave rings 21 are arranged at intervals along the axial direction. While extending circumferentially, each wave ring 21 also undulates circumferentially in a wave-like shape. Furthermore, adjacent wave rings 21 are connected as a whole due to continuous winding. Therefore, each wave ring 21 is not independent; all wave rings 21 are integrally wound from a single raw material wire 10, just like winding a spring. However, it should be noted that the structure of each wave ring 21 (number of wave crests, wave crest size, and waveform shape) can be set to be the same or different. Here, "wave crest" refers to the number of wave peaks or troughs in the same wave ring 21, "wave crest size" includes wave height and wave width, and the waveform includes, but is not limited to, a Z-shape. It should also be noted that the raw material wire 10 mentioned herein can refer to single-strand or multi-strand wire, and the wire can have various shapes and sizes. In practice, the size of the raw material wire 10 is small; preferably, the diameter of the raw material wire 10 is <0.3 mm. Here, the diameter of the raw material filament 10 refers to the cross-sectional dimension of the raw material filament 10 of any shape.

[0056] The stent fabrication equipment provided by this invention can produce self-expanding stents 20 with small outer diameter, long overall length, and tightly arranged waveforms. Preferably, the outer diameter (D) of the self-expanding stent 20 is <15mm, the length (L) is ≤300mm, and the peak or trough spacing is <2.5mm. The material of the self-expanding stent 20 prepared by this invention is not limited, such as nickel-titanium alloy or other shape memory materials.

[0057] The load-bearing frame 100 mainly serves to support the installation of the weaving fixture 200 and the feeding mechanism 300. It can have various structural forms, and there are no restrictions on this.

[0058] The outer shape of the braided fixture 200 matches the shape of the self-expanding stent 20. Since most vascular stents are tubular, the braided fixture 200 is also generally cylindrical.

[0059] There are no special requirements for the movement arrangement of the feeding mechanism 300 on the support frame 100. For cost considerations, the structure of the feeding mechanism 300 should be as simple as possible with few parts, and easy to assemble and disassemble. Therefore, the feeding mechanism 300 basically includes only a feeding tube 301 and a sliding slider 302. If necessary, a sliding handle 303 can also be provided. In some embodiments of this application, the feeding tube 301 is movably mounted on the support frame 100 via the sliding slider 302, and the structure of the sliding slider 302 is not limited.

[0060] Please refer to this carefully. Figure 11 and Figure 12 and combined Figure 1 and Figure 13 The outer circumferential surface of the weaving fixture 200 is provided with a plurality of positioning protrusions 201, which are arranged in a predetermined manner on the outer circumferential surface. Those skilled in the art, based on the disclosure in this application, should be able to understand how to arrange the positioning protrusions 201. Therefore, the number and arrangement of the positioning protrusions 201 are not limited, as long as there are a sufficient number of positioning protrusions 201 to wind a tubular support with a certain diameter, a certain length, and a certain waveform.

[0061] In practice, the basic principle for arranging the positioning protrusions 201 is that they are arranged in multiple rows along the circumference of the braiding fixture 200 and in multiple columns along the axial direction of the braiding fixture 200. For example, they can be arranged uniformly, unevenly, dispersedly, centrally, or randomly. The number of rows and columns can be set and adjusted according to actual needs. Furthermore, the axial positions of the positioning protrusions 201 in different rows can be the same (i.e., aligned) or different (i.e., staggered), and the circumferential positions of the positioning protrusions 201 in different columns can be the same (i.e., aligned) or different (i.e., staggered). Ultimately, this allows the raw material yarn 10 to be wound between the positioning protrusions 201 to form a tubular support with a certain diameter, a certain length, and a certain waveform. The following is a further illustrative explanation of the arrangement of the positioning protrusions 201.

[0062] Please refer to Figure 15As shown in (a), in an exemplary embodiment, the positioning protrusions 201 are arranged in multiple columns along the axial direction of the weaving fixture 200 and in multiple rows along the circumferential direction of the weaving fixture 200. The circumferential positions of the positioning protrusions 201 in different columns are aligned, and the axial positions of the positioning protrusions 201 in different rows are staggered, which is equivalent to the positioning protrusions 201 in each column being arranged diagonally along the circumferential direction; and then during weaving, please refer to Figure 15 As shown in (b), the raw material filament 10 winds around some positioning protrusions 201, and forms crests and troughs with the positioning protrusions 201 as constraint points, which can ultimately produce Figure 15 The undulating waveform structure shown in (c) has wave loops 21 of the same size.

[0063] Alternatively, please refer to Figure 16 As shown in (a), in an exemplary embodiment, the positioning protrusions 201 are arranged in multiple columns along the axial direction of the weaving fixture 200 and in multiple rows along the circumferential direction of the weaving fixture 200, with the circumferential positions of the positioning protrusions 201 in different columns aligned. Unlike the previous case, the axial positions of some positioning protrusions 201 are staggered, while the axial positions of other positioning protrusions 201 are aligned, and the column spacing of some positioning protrusions 201 is increased; therefore, during weaving, please refer to... Figure 16 As shown in (b), the raw material filament 10 winds around the selected positioning protrusions 201, and forms crests and troughs with the positioning protrusions 201 as constraint points, ultimately producing... Figure 16 The waveform structure shown in (c) contains both skewed wave loops 21 and unskewed wave loops 21, and wave loops 21 of different sizes can also be obtained.

[0064] Therefore, during the weaving process, the present invention can prepare the self-expanding bracket 10 with the required waveform based on the arrangement of the positioning protrusions 201 themselves. The self-expanding bracket 10 can have various waveform designs, such as the case mentioned above and other various variations.

[0065] For ease of processing and manufacturing, preferably, all positioning protrusions 201 have the same shape and size, and preferred shapes that are easy to process and manufacture are selected. A cylindrical shape is more suitable, but other shapes can also be used for positioning protrusions 201.

[0066] The distance between the positioning protrusions 201 (including the circumferential spacing and the axial spacing) is configured to allow the raw material filament 10 to pass smoothly between the positioning protrusions 201, and also to allow the bottom end 3011 of the feed tube 301 to extend into the space between the positioning protrusions 201 (see...). Figure 12 This allows the raw material yarn 10 to adhere to the outer circumferential surface of the weaving fixture 200, thereby ensuring the circumferential dimension (diameter) of the self-expanding bracket.

[0067] See also Figure 3As shown, the interior of the feed tube 301 (see...) Figure 3 The dotted line is used to pass through the raw material filament 10 (see...) Figure 12 That is, the inner cavity of the feeding tube 301 forms a feeding channel, and the size of the feeding channel is slightly larger than the outer diameter of the raw material wire 10.

[0068] Then refer to Figure 1 and Figure 13 and combined Figure 12 The bottom end 3011 of the feed tube 301 is used to extend into the positioning protrusions 201, so that the raw material filament 10 extending from the bottom end 3011 directly contacts the outer peripheral surface of the braiding fixture 200. It should be noted that the feed tube 301 can be arranged perpendicular to the braiding fixture 200, or the feed tube 301 can be arranged at an angle relative to the braiding fixture 200; in short, the feed tube 301 must remain relatively stable and cannot be shaken at will.

[0069] Continue to refer to Figure 3 and combined Figure 12 The bottom end 3011 of the feeding pipe 301 is the feeding section, and the feeding pipe 301 also includes a main body section 3012, which is arranged axially along the feeding pipe 301. The outer diameter of the main body section 3012 is the same as the outer diameter of the feeding section, or the outer diameter of the feeding section is smaller than the outer diameter of the main body section 3012. In a preferred embodiment, the outer diameter of the feeding section is smaller than the outer diameter of the main body section 3012; with this arrangement, the feeding pipe 301 does not need to be made thinner overall to ensure structural strength. At the same time, the outer diameter of the feeding section should be smaller than the distance between the positioning protrusions 201 so that the feeding section can extend into the space between the positioning protrusions 201. More preferably, a tapered transition section 3013 is provided between the feeding section (bottom end 3011) and the main body section 3012.

[0070] As mentioned above, during weaving, the weaving fixture 200 needs to be rotated while the feed tube 301 is moved. However, it is crucial to ensure the raw material yarn 10 remains taut at all times. One end (tail end) of the raw material yarn 10 is connected to the feeding device, and the other end (head end) of the raw material yarn 10 passes through the feed tube 301 and is fixed to the weaving fixture 200. The feed tube 301 then pulls the raw material yarn 10 extending from its bottom end 3011 to conform to the outer circumference of the weaving fixture 200 and circulate between the positioning protrusions 201, thereby producing a self-expanding support 20 with a preset shape and size. Here, the feeding and tensioning of the raw material yarn 10 can be achieved using common feeding devices, such as tension guns or yarn feeders; this invention does not limit the scope of these devices.

[0071] Based on this, combined Figure 12 The method for preparing the stent provided by the present invention will be further described below:

[0072] (1) When weaving, the raw material yarn 10 on the feeding device is pulled out and passed through the feeding pipe 301 and fixed to the weaving fixture 200, thereby ensuring that the raw material yarn 10 is always in a taut state.

[0073] (2) Adjust the height of the feeding pipe 301 and make the bottom end 3011 of the feeding pipe 301 close to the outer peripheral surface of the braiding fixture 200, so as to ensure that the raw material yarn 10 coming out from the bottom end 3011 can be close to the outer peripheral surface of the braiding fixture 200.

[0074] (3) Move the feeding tube 301 and rotate the braiding fixture 200 at the same time. During the movement of the feeding tube 301, the raw material filament 10 is pulled out from the bottom end 3011 and attached to the outer surface of the braiding fixture 200 to circle between the positioning protrusions 201 until a self-expanding bracket 20 with a preset shape and size is prepared.

[0075] (4) After weaving is completed, fix the end of the raw material yarn 10 to the weaving fixture 200 to prevent the woven raw material yarn 10 from unraveling.

[0076] (5) Finally, remove the braided raw material yarn 10 from the braided tool 200 and perform post-processing (heat setting).

[0077] In the above preparation process, the movement of the feeding tube 301 can be manually controlled or automatically controlled by a motor. In order to weave an undulating shape, the feeding tube 301 moves back and forth, so that the raw material filament 10 is wound into a wave pattern between the positioning protrusions 201. It can be wound into continuous undulating waves or discontinuous undulating waves.

[0078] Therefore, the stent preparation equipment provided by the present invention can complete the preparation of self-expanding stents through the cooperation of the braiding fixture 200 and the feeding mechanism 300. This preparation method can produce self-expanding stents with good consistency and stability in a simple and efficient manner. This type of self-expanding stent has good compliance, can be compressed, stretched, and bent in various ways, and can better complete vascular interventional treatment. In particular, it can better adapt to interventional treatment of complex blood vessels, and can show strong advantages in vascular tortuosity and curvature.

[0079] It should be noted that the driving method for the structural components requiring output movement in the support fabrication equipment provided by this invention can be manual drive, including fully manual drive, partially manual drive, partially electric drive, or fully electric drive. Specifically, the feeding mechanism 300 is manually driven or motor driven, and the weaving fixture 200 is manually driven or motor driven. For example, if the feeding mechanism 300 is manually driven, the weaving fixture 200 is also manually driven or motor driven; similarly, if the feeding mechanism 300 is motor driven, the weaving fixture 200 is either motor driven or manually driven. The following is an illustrative description.

[0080] In one exemplary embodiment, such as Figure 1 As shown, both the feeding tube 301 and the braiding fixture 200 are manually driven and do not require a motor. In this embodiment, the moving speed and path of the feeding tube 301, as well as the rotational speed and direction of the braiding fixture 200, can be manually controlled.

[0081] Continue to refer to Figure 1 Optionally, the feeding mechanism 300 also includes a sliding handle 303 connected to the movable slider 302; this configuration allows the operator to move the movable slider 302 by pulling it with the sliding handle 303. However, in other embodiments, the sliding handle 303 may be omitted. The sliding handle 303 is primarily designed for manual operation to make operation more convenient and comfortable.

[0082] Alternatively, the knitting fixture 200 may be equipped with a rotating handle 202, which may be located at one or both ends of the knitting fixture 200. With this configuration, the operator can drive the knitting fixture 200 by rotating the rotating handle 202, making operation more effortless and convenient. Here, the rotating handle 202 is an optional component in manual operation mode.

[0083] And, in another exemplary embodiment, such as Figure 13 As shown, both the feeding tube 301 and the braiding fixture 200 are driven by motors. The corresponding motors control the moving speed and moving path of the feeding tube 301, and the corresponding motors control the rotation speed and rotation direction of the braiding fixture 200.

[0084] However, when using active equipment (motor control) for weaving, the requirements for the servo motor are extremely high, and the algorithm needs to effectively eliminate the cumulative error of the motor. Therefore, the implementation is difficult and costly. Thus, manual control of the rotation of the weaving fixture 200 and the movement of the feed tube 301 is prioritized to reduce product complexity and cost.

[0085] Furthermore, the overall structure of the support fabrication equipment provided by this invention should be simple, minimizing the number of parts, simplifying the structure, and reducing costs, while also ensuring the detachability of the weaving fixture 200 and the feeding mechanism 300. To this end, the supporting frame 100 is composed of simple structural components, such as brackets, beams, and other basic components. Preferably, the weaving fixture 200 and the feeding mechanism 300 are detachably mounted on the supporting frame 100, with quick-release methods such as screw connections or mortise and tenon connections preferred. The weaving fixture 200 and the feeding mechanism 300 can be mounted on the same bracket or on different brackets. For easier assembly and disassembly of the weaving fixture 200, a more suitable approach is for the weaving fixture 200 and the feeding mechanism 300 to be independently mounted on different brackets.

[0086] Therefore, in a preferred embodiment, the support frame 100 includes a first bracket 101, a second bracket 102, and a crossbeam 103; the first bracket 101 and the second bracket 102 are independently arranged; the crossbeam 103 extends along a second direction, and both ends of the crossbeam 103 are fixed to the first bracket 101, preferably, the crossbeam 103 is detachably fixed to the first bracket 101. Furthermore, the feeding mechanism 300 is movably arranged on the crossbeam 103. The crossbeam 103 is used to support and install the feeding mechanism 300, providing a stable horizontal moving track for the feeding mechanism 300.

[0087] The crossbeam 103 adopts a non-circular cross-section beam structure, such as a rectangular beam or an irregularly shaped beam, which provides stable support for the feeding mechanism 300 and prevents the feeding pipe 301 from shaking. Figure 2 and Figure 18 In the described example, the crossbeam 103 is a rectangular beam with a rectangular cross-section 1031. This type of rectangular beam has a simple structure, is easy to process and manufacture, and has a strong load-bearing capacity. The connection between the crossbeam 103 and the first bracket 101 can include, for example, screw connections, tenon and mortise connections, or other commonly used detachable connection methods.

[0088] See also Figure 9 As shown, the support frame 100 preferably also includes a base 104. The base 104 can include various shapes and sizes. The base 104 is used to fix and install the bracket, making the entire bracket manufacturing equipment a modular integrated device, which is convenient for installation, use, and transportation. The connection method between the base 104 and the bracket is not limited, and includes, but is not limited to, welding, riveting, crimping, and screw connection. Optionally, the base 104 has an I-shaped structure, but it is not limited to this.

[0089] Next, the first bracket 101 is described. The first bracket 101 includes two opposing first bracket bodies 1011. The bottom of each first support 1011 can be directly fixed to the foundation or fixed to the base 104, preferably fixed to the base 104 for integration. The two ends of the crossbeam 103 are fixed to the two first bracket bodies 1011. The crossbeam 103 and the first bracket bodies 1011 are connected by a connection method that is easy to disassemble and install, such as screw connection or tenon connection.

[0090] like Figure 6 As shown, in some embodiments, the first bracket body 1011 is a single segment; after the feeding mechanism 300 is installed, since the first bracket body 1011 itself cannot rotate, the feeding mechanism 300 cannot be tilted relative to the weaving fixture 200, and the angle cannot be adjusted. Thus, after weaving is completed, it is necessary to first move the sliding block 302 to make the feeding tube 301 leave the weaving area of ​​the weaving fixture 200, then remove the feeding tube 301, and then remove the weaving fixture 200.

[0091] Preferred, such as Figure 20 As shown, the first bracket body 1011 is configured in two sections, allowing the upper part of the first bracket body 1011 to rotate relative to the lower part in a vertical plane, and it can also be locked at any time to maintain positional stability. Thus, simply installing the crossbeam 103 onto the upper part of the first bracket body 1011 allows the feeding mechanism 300 to rotate. This allows the feeding tube 301 to be tilted relative to the weaving fixture 200 for multi-angle adjustment, without obstructing the view and facilitating the assembly and disassembly of the weaving fixture 200. Therefore, after weaving is completed, simply rotating the first bracket body 1011 moves the feeding tube 301 away from the weaving fixture 200, allowing the weaving fixture 200 to be removed directly. This eliminates the need to disassemble and assemble the feeding mechanism 300, making operation more convenient.

[0092] However, as those skilled in the art will understand, the means of enabling the feed tube 301 to deflect relative to the braiding fixture 200 to adjust the angle are not limited to designing a rotatable first bracket body 1011. For example, a rotatable beam 103 could also be used, or the feed tube 301 itself could be rotatable relative to the movable slider 302. Regardless of the rotation method, the feed tube 301 can be locked after being rotated to the appropriate position.

[0093] In specific examples, such as Figure 6 and Figure 20 As shown, the first bracket body 1011 is provided with crossbeam mounting holes 10111; the crossbeam mounting holes 10111 are either through holes or blind holes; the shape of the crossbeam mounting holes 10111 matches the shape of the crossbeam 103; with this configuration, simply inserting both ends of the crossbeam 103 into the two crossbeam mounting holes 10111 of the first bracket body 1011 can fix the position of the crossbeam 103 and limit its height. The number of crossbeam mounting holes 10111 can be one, two, or more, and the multiple crossbeam mounting holes 10111 are arranged at intervals in the height direction, which facilitates the adjustment of the height of the crossbeam 103.

[0094] When the mounting hole 10111 of the crossbeam is a through hole, it is preferable to add limiting blocks 105 at both ends of the crossbeam 103. The limiting blocks 105 reduce the risk of the crossbeam 103 swaying. Specifically, the limiting blocks 105 are preferably detachably connected to the first bracket body 1011, especially by screws. In use, the limiting blocks 105 are tightly attached to the side of the first bracket body 1011 away from the crossbeam 103, thereby preventing the crossbeam 103 from shifting. Specifically: Figure 6 As shown, the first bracket body 1011 is provided with a limit block mounting hole 10112; correspondingly, as Figure 5As shown, the limiting block 105 is provided with bolt mounting holes 1051. Bolts are inserted into the bolt mounting holes 1051 and the limiting block mounting holes 10112. Nuts corresponding to the bolts are screwed on the opposite side of the limiting block 105. Thus, the limiting block 105 is tightly attached to and fixed to the first bracket body 1011 by means of the centering tightening force.

[0095] However, those skilled in the art should recognize that there are various ways to limit the swaying of the crossbeam 103, including but not limited to the implementation of the limiting block 105. Moreover, the setting of the limiting block 105 is mainly for the transition fit between the two ends of the crossbeam 103 and the through holes on the first bracket body 1011. If the original connection method is strong enough, there is no need to set an additional structure to limit the crossbeam 103. In addition, it should be noted that the connection method between the limiting block 105 and the first bracket body 1011 includes, but is not limited to, screw connection.

[0096] Therefore, in a preferred embodiment, the top end of the feed pipe 301 is connected to a movable slider 302, which is movably mounted on the crossbeam 103. The crossbeam 103 stably supports the movable slider 302, preventing it from swaying back and forth or left and right. Figure 4 As shown, in an optional embodiment, the movable slider 302 and the crossbeam 103 are fitted with a shaft hole. The movable slider 302 slides on the crossbeam 103 through a sliding groove 3021, and the shape of the sliding groove 3021 matches the shape of the crossbeam 103.

[0097] Alternatively, the movable slider 302 and the crossbeam 103 can have a convex-concave fit, wherein one of the movable slider 302 and the crossbeam 103 has a protrusion and the other has a recess, with the protrusion fitting into the recess. This makes the movable slider 302 more stable during use. Preferably, the roughness of the mating surface between the movable slider 302 and the crossbeam 103 is small (e.g., <0.8) to make the movement process smoother.

[0098] In a specific example, such as Figures 17 to 19 As shown, a T-shaped protrusion 3025 is further provided in the sliding groove 3021 of the movable slider 302, and the crossbeam 103 is provided with a T-shaped groove 1031 that extends through its length. The movable slider 302 and the crossbeam 103 are slidably connected by the cooperation of the T-shaped groove 1031 and the T-shaped protrusion 3025.

[0099] Furthermore, if manual operation is adopted, a sliding handle 303 is preferably provided on the movable slider 302. The movable slider 302 can be integrally formed with the sliding handle 303, or the sliding handle 303 and the movable slider 302 can be separately formed and connected.

[0100] The method of fixing the movable slider 302 to the feeding tube 301 is not limited. In a preferred embodiment, the movable slider 302 clamps and fixes the top end of the feeding tube 301. This structure is simple and facilitates the assembly and disassembly of the feeding tube 301.

[0101] This is illustrative; please continue to refer to it. Figure 4 The movable slider 302 is provided with a clamping groove 3022, a clamping channel 3023, and a clamping through hole 3024. The clamping groove 3022 is a narrow groove that communicates with the clamping channel 3023. The clamping through hole 3024 passes through the clamping groove 3022. Furthermore, the top end of the feeding tube 301 is fitted with the clamping channel 3023 with a clearance. A bolt is inserted into the clamping through hole 3024, and the bolt passes through the clamping groove 3022 and is then screwed into a nut for fixation. With this arrangement, the width of the clamping groove 3022 can be reduced by means of the centering tightening force of the bolt and nut, thereby causing the clamping channel 3023 to shrink inward and clamp the top end of the feeding tube 301, resulting in reliable and stable clamping.

[0102] As described above, the second bracket 102 specifically includes two opposing second bracket bodies 1021. The bottoms of the two second bracket bodies 1021 can be directly fixed to the foundation or fixed to the base 104, preferably fixed to the base 104 for integration. Furthermore, the two ends of the weaving fixture 200 are rotatably disposed on the tops of the two second bracket bodies 1021. The top of each second bracket body 1021 engages with the outer peripheral surface of the weaving fixture 200, allowing the weaving fixture 200 to rotate around the first direction while simultaneously restricting the axial movement of the weaving fixture 200 along the first direction, thus ensuring the stability of the weaving.

[0103] Indicative, such as Figure 10 As shown, the top of the second bracket body 1021 is provided with a mounting groove 10211 for supporting and mounting the braiding fixture 200. That is, both ends of the braiding fixture 200 are placed in the mounting grooves 10211 of the two second bracket bodies 1021. While supporting the braiding fixture 200, the mounting groove 10211 allows the braiding fixture 200 to rotate around a first direction, but at the same time restricts the axial movement of the braiding fixture 200 along the first direction. The mounting groove 10211 can be circumferentially open or circumferentially closed and openable.

[0104] In some embodiments of the present invention, the friction between the weaving fixture 200 and the mounting groove 10211 is sliding friction, for example... Figure 10 As shown in (a) and (b), the mounting slot 1021 directly contacts and supports the braided fixture 200.

[0105] In a preferred embodiment of the present invention, as Figure 10As shown in (c), a rolling bearing 1023 is provided at the mounting groove 10211, which directly contacts and supports the braiding fixture 200. The use of the rolling bearing 1023 can reduce friction and make the rotation of the braiding fixture 200 smoother.

[0106] When using manual operation mode, preferably, at least one second bracket body 1021 is provided with a stop device on its top, which is used to prevent the weaving fixture 200 from rotating when needed. This is mainly applicable to situations where weaving needs to be stopped midway.

[0107] Please refer to Figure 10 As shown in (b) of the diagram, in an exemplary embodiment, the stopping device includes a fixed base 1022; the fixed base 1022 is rotatably disposed on the top of the second bracket body 1021; the fixed base 1022 is provided with a threaded hole 10221; when stopping is required, the fixed base 1022 is fastened onto the weaving fixture 200 and fixed to the second bracket body 1021, and then a bolt is inserted into the threaded hole 10221 until the bolt abuts against the outer peripheral surface of the weaving fixture 200, thereby preventing the weaving fixture 200 from rotating. It should also be noted that the structure of the stopping device is not limited to this.

[0108] Then return to the reference. Figure 9 As shown, in one specific embodiment, the base 104 is provided with two first bracket mounting holes 1041 and two second bracket mounting holes 1042; the two first bracket mounting holes 1041 are fixedly engaged with two first bracket bodies 1011, and the two second bracket mounting holes 1042 are fixedly engaged with two second bracket bodies 1012; thereby restricting the degree of freedom of each bracket body.

[0109] On the other hand, the weaving fixture 200 can be a one-piece molded structure or a split molded structure. The weaving fixture 200 is mainly a three-section structure, including a first support section 2001, a weaving section 2002, and a second support section 2003 arranged sequentially along the axial direction; the first support section 2001 and the second support section 2003 are rotatably mounted on the supporting frame 100. In a preferred embodiment, the first support section 2001 and the second support section 2003 are rotatably mounted on two second bracket bodies 1021. Among them, the first support section 2001, the weaving section 2002, and the second support section 2003 are all generally cylindrical, and the positioning protrusion 201 is only provided on the weaving section 2002, which provides the weaving function. The first support section 2001, the braided section 2002, and the second support section 2003 are integrally formed, or the first support section 2001, the braided section 2002, and the second support section 2003 are connected as one unit by an internal spindle 2004, with both ends of the spindle 2004 fixed to two second bracket bodies 1021.

[0110] In a specific example, the first support section 2001, the braided section 2002, and the second support section 2003 are all provided with an inner hole a (see...). Figure 7 and Figure 11 The inner hole a mates with the mandrel 2004, and the same mandrel 2004 passes through the three inner holes a, fixing the three sections of the structure together as one unit. This arrangement facilitates the manufacturing of the braiding fixture 200 and reduces the manufacturing difficulty. Similar to the crossbeam 103, the mandrel 2004 adopts a non-circular cross-section, such as a rectangular or irregular cross-section, which provides stable support for the braiding fixture 200 and prevents it from shaking. In this embodiment, the inner holes a of the first support section 2001, the braiding section 2002, and the second support section 2003 are all rectangular holes, allowing the rectangular cross-section mandrel 2004 to pass through and transition fit, fixing the three independent sections of the first support section 2001, the braiding section 2002, and the second support section 2003 together as a whole. However, the mandrel 2004 can also be omitted, and the first support section 2001, the braiding section 2002, and the second support section 2003 can be made into a solid structure, and the three sections can be machined into one piece.

[0111] The outer diameters of the first support segment 2001 and the second support segment 2003 are the same, and the outer diameter of the braided segment 2002 is less than or equal to the outer diameters of the first support segment 2001 and the second support segment 2003. In this embodiment, the outer diameter of the braided segment 2002 is smaller than the outer diameters of the first support segment 2001 and the second support segment 2003, causing the braided fixture 200 to form an I-shaped structure with large ends and a small middle section. This increases the support force at both ends and improves the stability of the braided fixture 200.

[0112] Please refer to Figure 1 and Figure 8 As shown, when the knitting fixture 200 is manually driven, optionally, a rotating handle 202 can be configured for the knitting fixture 200. The rotating handle 202 is located at one or both ends of the knitting fixture 200. For example, at least one of the first support section 2001 and the second support section 2003 is provided with a rotating handle 202. The rotating handle 202 is integrally formed or separately formed and connected to the knitting fixture 200. Schematic, at least one of the first support section 2001 and the second support section 2003 is provided with a handle connection hole b for mounting the rotating handle 202. In this case, the support section with the rotating handle 202 is equivalent to a rotating shaft for transmitting the torque of the rotating handle 202.

[0113] Optionally, such as Figure 7 As shown, the first support section 2001 and the second support section 2003 are both circumferentially engaged with the second bracket body 1021 through the annular groove c, so as to realize the rotation of the weaving fixture 200 and at the same time restrict the axial movement of the weaving fixture 200.

[0114] Since the structures of the first support segment 2001 and the second support segment 2003 are basically the same, the description will focus on the structure of the first support segment 2001. Please refer to... Figure 7 In one specific embodiment, the first support section 2001 has an inner hole a, a handle connection hole b, and an annular groove c; the inner hole a cooperates with the spindle 2004; the annular groove c cooperates circumferentially with the mounting groove 10211 to realize the rotation of the braiding fixture 200 and prevent the braiding fixture 200 from moving; the handle connection hole b is used to connect the rotating handle 202.

[0115] And, reference Figure 11 As shown, the raw material yarn 10 is mainly fixed by the braiding section 2002. Specifically, the braiding section 2002 is provided with raw material yarn fixing holes 2005 (internal threaded holes). There are two raw material yarn fixing holes 2005, which are set at both ends of the braiding area defined by the positioning protrusion 201. One raw material yarn fixing hole 2005 is used to insert a bolt and fix the head end of the raw material yarn 10, and the other raw material yarn fixing hole 2005 is used to insert another bolt and fix the tail end of the raw material yarn 10. The raw material yarn is wound around the bolt, and the bolt is inserted into the raw material yarn fixing hole 2005 to fix the head end or the tail end of the raw material yarn 10. The raw material yarn fixing hole 2005 can be prepared by pre-drilling holes in the braiding fixture 200 and then inserting a stud with internal threads, or by directly drilling holes in the braiding fixture 200 and preparing internal threads. Furthermore, in other embodiments, the head end or the tail end of the raw material yarn 10 can also be fixed by knotting, bonding, or other convenient fixing methods.

[0116] Finally, it should be noted that the woven tooling 200 can form the positioning protrusion 201 through various methods such as riveting, hot pressing, threaded connection or integral molding, and the present invention is not limited in this regard.

[0117] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Furthermore, although the present invention has been disclosed above with 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 using 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, still fall within the scope of protection of the present invention.

[0118] It should also be understood that, unless otherwise specified or indicated, the terms "first," "second," "third," etc., used in the specification are merely for distinguishing individual components, elements, steps, etc., and are not for indicating logical or sequential relationships between them. It should also be understood that the singular forms "a" and "an" used herein and in the appended claims include the plural basis, unless the context clearly indicates otherwise. For example, a reference to "a step" or "a device" implies a reference to one or more steps or devices, and may include secondary steps and secondary devices.

Claims

1. A stent fabrication device, characterized in that, include: Support frame; A rotatable braiding fixture is mounted on the support frame. The braiding fixture is capable of rotating about a first direction defined by its own central axis. The outer peripheral surface of the braiding fixture is provided with a plurality of positioning protrusions arranged in a predetermined manner. as well as, A feeding mechanism movably mounted on the support frame includes a feeding tube that is movable along a second direction parallel to the first direction. The interior of the feeding tube is used to pass raw material filaments, and the bottom end of the feeding tube is used to extend into the positioning protrusions. During weaving, the raw material yarn is always under tension. One end of the raw material yarn is connected to the feeding device, and the other end of the raw material yarn passes through the feeding tube and is fixed on the weaving fixture. While the weaving fixture rotates, the feeding tube moves and pulls the raw material yarn extending from the bottom end to conform to the outer circumference of the weaving fixture and wrap around the positioning protrusions, thereby producing a self-expanding bracket with a preset shape and size.

2. The stent fabrication equipment as described in claim 1, characterized in that, The positioning protrusions are arranged in multiple rows along the circumference of the weaving fixture and in multiple columns along the axial direction of the weaving fixture. The axial positions of the positioning protrusions in different rows may be the same or different, and the circumferential positions of the positioning protrusions in different columns may be the same or different. All the positioning protrusions have the same shape and size.

3. The stent fabrication equipment as described in claim 1, characterized in that, The feed tube can be deflected relative to the braiding fixture to adjust the angle; The feeding mechanism further includes a movable slider, the top end of the feeding tube is connected to the movable slider, the movable slider is movably disposed on the crossbeam of the supporting frame, the crossbeam extends along the second direction, and the movable slider clamps and fixes the top end of the feeding tube.

4. The stent fabrication equipment as described in claim 1, characterized in that, The bottom end of the feeding pipe forms a feeding section, and the feeding pipe also includes a main body section. The main body section and the feeding section are arranged along the axial direction of the feeding pipe. The outer diameter of the feeding section is smaller than the outer diameter of the main body section, and the outer diameter of the feeding section is also smaller than the distance between the positioning protrusions. A tapered transition section is provided between the feeding section and the main body section.

5. The stent fabrication equipment as described in claim 1, characterized in that, The load-bearing frame includes a first bracket, a second bracket, a crossbeam, and a base; the first bracket and the second bracket are independently arranged. The first bracket includes two first bracket bodies arranged opposite each other; the bottoms of the two first bracket bodies are fixed to the base; both ends of the crossbeam are fixed to the two first bracket bodies; the feeding mechanism is movably arranged on the crossbeam; The second bracket includes two second bracket bodies arranged opposite to each other; The bottoms of the two second brackets are fixed to the base; the two ends of the weaving fixture are rotatably disposed on the tops of the two second brackets; the top of each second bracket engages with the outer peripheral surface of the weaving fixture, so that the weaving fixture can rotate around the first direction and restrict the axial movement of the weaving fixture along the first direction.

6. The stent fabrication equipment as described in claim 5, characterized in that, At least one of the second bracket bodies is provided with a stop device on its top, which is used to prevent the weaving fixture from rotating when necessary.

7. The stent fabrication equipment as described in claim 6, characterized in that, The stopping device includes a fixed base, which is rotatably disposed on the top of the second bracket body. The fixed base is provided with a threaded hole for inserting a bolt, which is used to abut against the weaving fixture to prevent the weaving fixture from rotating.

8. The stent fabrication equipment as described in claim 1, characterized in that, The weaving fixture includes a first support section, a weaving section, and a second support section arranged sequentially along the axial direction; the positioning protrusion is only provided on the weaving section; the first support section and the second support section are rotatably disposed on the bearing frame; the first support section, the weaving section, and the second support section are integrally formed, or the first support section, the weaving section, and the second support section are connected as one unit by an internal mandrel.

9. The stent fabrication apparatus as described in claim 1, characterized in that, The feeding mechanism is manually driven or motor driven, and the weaving fixture is manually driven or motor driven.

10. A method for fabricating a stent, characterized in that, The stent fabrication apparatus as described in any one of claims 1-9 is used, and the stent fabrication method comprises: During weaving, the raw yarn on the feeding device is pulled out and passed through the feeding tube and then fixed to the weaving fixture; The raw material yarn is brought into a tensioned state, which in turn drives the weaving fixture to rotate and the feeding tube to move. During the movement of the feeding tube, the raw material yarn is pulled out from the bottom and fits against the outer circumference of the weaving fixture, winding around the positioning protrusions until a self-expanding bracket with a preset shape and size is produced.

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