Tubular stent end preparation device and method

Abstract

This invention discloses a device and method for treating the ends of tubular stents. The device includes: a first mold with a first injection groove; a second mold with a second injection groove; and a support frame for fixing the first mold, the second mold, and the tubular stent to be treated. The tubular stent is configured such that its first end is inserted into the first injection groove, and its second end is inserted into the second injection groove. This invention can precisely treat the ends of tubular stents. By designing the dimensions of each component of the device, the coating effect of the curing adhesive on the ends of the tubular stent can be precisely adjusted. Through different structural designs of the two molds and their fixing methods on the support frame, the liquid adhesive at both ends of the tubular stent can be cured simultaneously in one step. The device has a simple structure, is easy to operate, low in cost, and saves time and effort. The treated tubular stent ends are smooth with no exposed threads, resulting in an aesthetically pleasing finished product. During use, it will not cause problems such as frayed edges or abnormal tissue proliferation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a device and method for processing the end of a tubular stent. Background Technology

[0002] Tubular braided stents, including vascular stents, tracheal stents, esophageal stents, bile duct stents, ureteral stents, fallopian tube stents, intestinal stents, urethral stents, and prostate stents, have a wide range of applications in the biomedical field. Currently, tubular braided stents have played an important role in treating various ductal organ stenosis and occlusion diseases.

[0003] Existing scaffolds are mostly hand-woven. Laminated scaffolds are typically formed by hand weaving, impregnation to form a film, or hand sewing, which has drawbacks such as low production efficiency and inconsistent product quality.

[0004] The emergence of mechanically braided scaffolds and integrated mechanically braided coated scaffolds has effectively overcome the aforementioned drawbacks. However, the cutting process after continuous braiding can expose numerous filament ends at both ends of the scaffold. This not only affects the aesthetics of the finished product but also easily leads to problems such as frayed edges and stimulation of abnormal tissue proliferation.

[0005] Therefore, it is particularly important to determine how to treat the exposed wire ends of such tubular stents to meet the requirements of clinical applications. A search revealed no literature reports on the treatment of exposed wire ends of tubular stents. Summary of the Invention

[0006] This application provides a tubular stent end processing device and method, which solves the technical problem in the prior art where cutting after continuous weaving exposes many filament ends at both ends of the tubular stent, which not only affects the appearance of the finished product, but also easily leads to fraying of the stent and stimulation of abnormal tissue proliferation.

[0007] In a first aspect, embodiments of this application provide a tubular stent end processing device, comprising:

[0008] A first mold, wherein the first mold is provided with a first injection groove;

[0009] The second mold is provided with a second injection groove;

[0010] A support frame is used to fix the first mold, the second mold, and the tubular support to be processed.

[0011] The tubular support is configured such that: a first end is inserted into a first injection groove on the first mold, and a second end is inserted into a second injection groove on the second mold.

[0012] Preferably, the support frame includes:

[0013] Base;

[0014] A support rod is provided on the base;

[0015] An annular clamping assembly, located on the support rod, is used to fix the first mold, the second mold, and the tubular support to be processed.

[0016] Preferably, the support rod is arranged perpendicularly to the base; and

[0017] The annular clamp is arranged parallel to the base.

[0018] Preferably, the first mold includes a first cylindrical body, on which an annular first injection groove is formed.

[0019] Preferably, the second mold comprises:

[0020] A frustum, the frustum comprising a second cylindrical body, the bottom of the second cylindrical body extending radially outward to form a cylindrical base with a diameter larger than that of the second cylindrical body;

[0021] An annular barrel, the annular barrel comprising an annular body, the bottom of the annular body extending radially inward to form an annular base platform with a diameter smaller than that of the annular body;

[0022] The annular barrel is coaxially positioned on the lower outer periphery of the truncated cone. A gap is provided between the inner wall of the annular base and the outer wall of the cylindrical base, and this gap matches the thickness of the tubular support.

[0023] The second end of the tubular support is configured to be engaged between the inner wall of the annular base and the outer wall of the cylindrical base;

[0024] The annular barrel and the frustum form an annular second glue injection groove.

[0025] Preferably, the annular barrel is composed of two semi-circular barrels that are snapped together, and the snapping surfaces of the two semi-circular barrels are provided with matching protrusions and grooves.

[0026] Preferably, let w1 be the width of the bottom of the annular body extending radially inward, w2 be the width of the bottom of the second cylindrical body extending radially outward, t be the thickness of the tubular support, and w3 be the width of the first injection groove, then: w3 = w1 + w2 + t.

[0027] Preferably, the annular clamp assembly comprises:

[0028] A first annular clamp is used to fix the first mold;

[0029] The second annular clamp is used to fix the frustum;

[0030] The third annular clamp is used to fix the annular barrel;

[0031] A fourth annular clamp is used to fix the tubular support, and the tubular support is configured such that: a first end is inserted into a first injection groove on the first mold; and a second end is engaged between the inner wall of the annular base and the outer wall of the cylindrical base, and extends into the second injection groove.

[0032] Secondly, this application also provides a method for processing the end of a tubular stent, using the aforementioned tubular stent end processing device, wherein the method comprises the following steps:

[0033] Fix the first mold on the support frame and inject liquid glue into the first glue injection groove on the first mold;

[0034] Insert the first end of the tubular bracket below the liquid adhesive level in the first glue injection tank, and fix the tubular bracket to the support frame platform;

[0035] The second mold is fixed on the support frame, and the second injection groove of the second mold surrounds the second end of the tubular support; liquid glue is injected into the second injection groove so that the second end of the tubular support is immersed in the liquid glue;

[0036] Vacuuming is used to remove air bubbles from the liquid adhesive in the first and second dispensing tanks.

[0037] The support frame, which is fixed with the first mold, the second mold and the tubular bracket, is placed in an oven for liquid adhesive curing; after curing, it is removed.

[0038] Remove the first mold and the second mold, and take the tubular bracket off the support frame to obtain a tubular bracket with both ends covered with cured adhesive.

[0039] Preferably, fixing the second mold to the support frame and making the second injection groove of the second mold surround the second end of the tubular support specifically includes:

[0040] Insert the lower part of the frustum into the second end of the tubular bracket and fix the frustum on the support frame.

[0041] Two semi-circular ring barrels are surrounded around the second end of the tubular support to form an annular barrel; the annular barrel is fixed on the support frame; at this time, an annular second glue injection groove is formed between the annular barrel and the truncated cone; the second end of the tubular support is engaged between the inner wall of the annular base of the annular barrel and the outer wall of the cylindrical base of the truncated cone, and extends into the second glue injection groove.

[0042] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0043] 1. By coating the ends of the tubular scaffold with liquid adhesive and then curing it, the ends of the tubular scaffold are covered with cured adhesive. This solves the technical problem in existing technologies where cutting after continuous weaving exposes many filaments at both ends of the tubular scaffold, which not only affects the appearance of the finished product but also easily leads to fraying and stimulation of abnormal tissue proliferation. The treated tubular scaffold has smooth ends with no exposed filaments, resulting in an aesthetically pleasing finished product that does not experience fraying or stimulation of abnormal tissue proliferation during use.

[0044] 2. The tubular support end treatment device provided in this application can precisely treat the end of the tubular support. By designing the dimensions of each component of the tubular support end treatment device, the coating effect of the cured adhesive on the end of the tubular support can be precisely adjusted, avoiding the defects of manual treatment that cannot accurately control the coating effect.

[0045] 3. The tubular support end treatment device provided in this application, through the different structural designs of the upper and lower molds, especially the ingenious design of the upper mold and its fixing method on the support frame, can simultaneously cure the liquid adhesive at both ends of the tubular support at one time, avoiding the defects of manually heating both ends one after another, which wastes time and cost; at the same time, it also avoids the defects of shrinkage and deformation of the structure that has already been heated at the first end when the second end is heated.

[0046] 4. The tubular support end treatment method provided in this application removes air bubbles in the liquid adhesive in the first and second injection tanks by vacuuming, which can avoid the presence of air bubbles in the cured adhesive after heating, thus affecting the aesthetics of the finished product.

[0047] 5. The tubular stent end treatment device provided in this application has a simple structure, is easy to operate, has low cost, saves time and labor, has good treatment effect, is easy to standardize and scale up, and is suitable for widespread use. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the tubular support end processing device provided in the embodiments of this application;

[0049] Figure 2 This is a schematic diagram of the ring clamp structure in an embodiment of this application;

[0050] Figure 3 This is a perspective view of the first mold in the embodiments of this application;

[0051] Figure 4 This is a cross-sectional view of the first mold in an embodiment of this application;

[0052] Figure 5 This is a top view of the first mold in the embodiments of this application;

[0053] Figure 6 This is a perspective view of the second mold in the embodiments of this application;

[0054] Figure 7 This is a three-dimensional schematic diagram of the frustum of the second mold in the embodiments of this application;

[0055] Figure 8 This is a cross-sectional view of the frustum of the second mold in the embodiments of this application;

[0056] Figure 9 This is a top view of the frustum of the second mold in an embodiment of this application;

[0057] Figure 10 This is a three-dimensional schematic diagram of the semi-circular ring barrel of the second mold in the embodiments of this application;

[0058] Figure 11 This is a cross-sectional view of the semi-circular ring barrel of the second mold in the embodiment of this application;

[0059] Figure 12 This is a top view of the semi-circular ring barrel of the second mold in the embodiment of this application;

[0060] Figure 13 This is an illustration showing the effect of coating the ends of the tubular support with curing adhesive in an embodiment of this application.

[0061] Figure 14 This is a cross-sectional view of the tubular support end after being coated with cured adhesive in an embodiment of this application. Detailed Implementation

[0062] This application provides a tubular stent end processing device and method, which solves the technical problem in the prior art where cutting after continuous weaving exposes many filament ends at both ends of the tubular stent, which not only affects the appearance of the finished product, but also easily leads to fraying of the stent and stimulation of abnormal tissue proliferation.

[0063] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0064] A device for treating the ends of a tubular support is designed, comprising a support frame and upper and lower molds. Multiple annular clamps are provided on the support frame. The tubular support and the upper and lower molds are fixed to the support frame via the annular clamps. The upper and lower ends of the tubular support are inserted into the injection grooves on the upper and lower molds, respectively. Liquid adhesive is injected into the injection grooves, immersing the upper and lower ends of the tubular support entirely in the liquid adhesive. The support frame, the upper and lower molds fixed thereon, and the tubular support are placed in an oven for heating and curing. After curing, the support frame is removed, and the upper and lower molds are dismantled, yielding a tubular support with both ends treated with liquid adhesive.

[0065] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0066] Figure 1 This is a schematic diagram of the overall structure of the tubular stent end-processing device provided in the embodiments of this application. The tubular stent end-processing device includes:

[0067] First mold 1, the first mold 1 is provided with a first injection groove;

[0068] The second mold 2 is provided with a second injection groove;

[0069] Support frame 3, which is used to fix the first mold 1, the second mold 2 and the tubular support 4 to be processed;

[0070] The first end of the tubular support 4 is inserted into the first injection groove on the first mold 1, and the second end of the tubular support 4 is inserted into the second injection groove on the second mold 2.

[0071] Furthermore, the support frame 3 includes:

[0072] Base 31;

[0073] Support rod 32, which is mounted on the base 31;

[0074] The annular clamping assembly 33 is disposed on the support rod 32 and is used to fix the first mold 1, the second mold 2 and the tubular support 4 to be processed.

[0075] In a preferred embodiment, the base 31 is horizontally arranged, and the support rod 32 is vertically arranged relative to the base 31 and fixedly connected to the base 31.

[0076] The annular clamp assembly 33 includes multiple annular clamps, each annular clamping part comprising an annular clamping portion and a fixing portion connected to the annular clamping portion. The fixing portion is fixedly connected to the support rod 32, and the annular clamping portion is horizontally positioned.

[0077] Combination Figure 2In a preferred embodiment, the annular clamping portion includes a first semi-annular clamping member 3321 and a second semi-annular clamping member 3322 that cooperate with each other. The first semi-annular clamping member 3321 is integrally formed with the fixing portion 3323, and the second semi-annular clamping member 3322 and the first semi-annular clamping member 3321 are detachably connected by bolts 3324. A circular clamping space is formed between the second semi-annular clamping member 3322 and the first semi-annular clamping member 3321 to facilitate the placement of the clamped object.

[0078] The ring clamps of the ring clamp assembly 33 have basically the same structure, the only difference being the inner diameter of the clamping space of each ring clamp. The inner diameter of the clamping space of each ring clamp is matched with the size of the corresponding clamped object, so that it can just fix the clamped object without damaging the surface of the clamped object.

[0079] In a preferred embodiment, the support frame 3 is made of plastic or metal, such as an iron frame.

[0080] Figures 3-5 The diagram shown is a structural schematic of the first mold in an embodiment of this application. The first mold 1 includes a first cylindrical body 11, on which an annular first injection groove 12 is formed.

[0081] In a preferred embodiment, the opening of the first glue injection groove 12 faces upward.

[0082] Figure 6 The diagram shown is a structural schematic of the second mold in an embodiment of this application. The second mold 2 includes a frustum 21 and an annular barrel 22, with the annular barrel 22 coaxially disposed on the lower outer periphery of the frustum 21. (Combined with...) Figure 1 A second annular injection groove 23 is formed between the annular barrel 22 and the frustum 21.

[0083] Combination Figures 7-9 The frustum 21 includes a second cylindrical body 211, the bottom of which extends radially outward to form a cylindrical base 212 with a diameter larger than that of the second cylindrical body 211.

[0084] The annular barrel 22 includes an annular body, the bottom of which extends radially inward to form an annular base with a diameter smaller than that of the annular body.

[0085] In a preferred embodiment, such as Figures 10-12As shown, the annular barrel 22 is composed of two semi-circular barrels that are snapped together. Each semi-circular barrel includes a semi-circular body 221, the bottom of which extends radially inward to form a semi-circular base 222 with a diameter smaller than the body 221. The two longitudinal sections of the semi-circular body 221 are respectively provided with matching protrusions 223 and grooves 224. The two semi-circular barrels are snapped together by the protrusions 223 and grooves 224 to form the annular barrel 22, at which point the two semi-circular bases 222 are joined to form an annular base.

[0086] The annular barrel 22 is configured to be coaxially disposed on the lower outer periphery of the frustum 21, and a gap is provided between the inner wall of the annular base of the bottom of the annular barrel 22 and the outer wall of the cylindrical base 212 at the bottom of the frustum 21, and the gap matches the thickness of the tubular support 4.

[0087] In use, the second end of the tubular support 4 is configured to be engaged between the inner wall of the annular base and the outer wall of the cylindrical base.

[0088] In a preferred embodiment, the tubular support 4 is vertically fixed to the support frame 3, with the first end of the tubular support 4 being the lower end and the second end being the upper end. The lower end of the tubular support 4 is inserted into the first injection groove 12 on the first mold 1; the upper end of the tubular support 4 is engaged between the inner wall of the annular base of the annular barrel 22 and the outer wall of the cylindrical base of the frustum 21.

[0089] In a preferred embodiment, the height of the annular base of the annular barrel 22 is the same as the height of the cylindrical base of the frustum 21. After the annular barrel 22 is assembled around the frustum 21, the annular base of the annular barrel 22 is flush with the cylindrical base of the frustum 21. The upper surface of the annular base of the annular barrel 22, the upper surface of the cylindrical base of the frustum 21, and the cross-section of the tubular support 4, which is clamped between the annular base of the annular barrel 22 and the cylindrical base of the frustum 21, together constitute the bottom surface of the second glue injection groove 23. The inner surface of the annular body of the annular barrel 22 and the outer surface of the second cylindrical body 211 of the frustum 21 respectively constitute the wall surface of the second glue injection groove 23.

[0090] The upper end of the tubular support 4 extends into the second glue injection groove 23 to facilitate immersion in liquid glue.

[0091] In a preferred embodiment, the first mold 1 and the second mold 2 are made of plastic or metal.

[0092] In a preferred embodiment, the first glue injection tank 12 and the second glue injection tank 23 are provided with scales to facilitate identification of the amount of liquid glue poured into them.

[0093] In a preferred embodiment, the annular clamp assembly includes:

[0094] The first annular clamp 331 has its fixed end fixed to the support rod 32, and its annular clamping part is used to clamp the first mold 1.

[0095] The second annular clamp 332 has its fixed end fixed to the support rod 32, and its annular clamping part is used to clamp the frustum 21.

[0096] The third annular clamp 333 has its fixed end fixed to the support rod 32, and its annular clamping part is used to clamp the annular barrel 22.

[0097] The fourth annular clamp 334 has its fixed end fixed to the support rod 32, and its annular clamping part is used to clamp the tubular support 4.

[0098] The tubular support 4 is configured such that its lower end is inserted into the first glue injection groove 12 on the first mold 1; and its upper end is engaged between the inner wall of the annular base of the annular barrel 22 and the outer wall of the cylindrical base of the frustum 21, and extends into the second glue injection groove 23.

[0099] The second ring clamp 332, the third ring clamp 333, the fourth ring clamp 334, and the first ring clamp 331 are arranged sequentially from top to bottom.

[0100] The specific usage method of the above-mentioned tubular support end treatment device is as follows:

[0101] Step S1: Place the first mold 1 in the center of the base 31 on the support frame, and fix the first mold 1 on the support frame with the first ring clamp 331; inject liquid glue into the first glue injection groove 12 on the first mold 1;

[0102] Step S2: Insert the lower end of the tubular support 4 below the liquid adhesive level in the first glue injection tank 12, and fix the tubular support 4 to the support frame using the fourth annular clamp 334;

[0103] Step S3: Insert the lower end of the frustum 21 into the upper end of the tubular bracket 4, and fix the frustum 21 to the support frame using the second annular clamp 332;

[0104] Step S4: The two semi-circular ring barrels are surrounded on the upper outside of the tubular support 4. The two semi-circular ring barrels are connected by the protrusion 223 and the groove 224 to form an annular barrel 22. The bottom of the annular barrel 22 is flush with the bottom of the frustum 21. The outer circumference of the annular barrel 22 is fixed by the third annular clamp 333. At this time, the annular barrel 22, the upper end of the tubular support 4, and the lower end of the frustum 21 are tightly fixed together.

[0105] Liquid adhesive is injected into the second adhesive injection groove 23 formed between the frustum 21 and the annular barrel 22, so that the upper end of the tubular support 4 is completely immersed in the liquid adhesive.

[0106] Step S5: Vacuum pump to remove air bubbles from the liquid adhesive in the first dispensing tank 12 and the second dispensing tank 23;

[0107] Step S6: Place the entire support frame, which is fixed with the first mold 1, the second mold 2 and the tubular bracket 4, into an oven for liquid adhesive curing; after curing, remove the entire support frame.

[0108] Step S7: Remove the first mold 1 and the second mold 2, and remove the tubular bracket 4 from the support frame 3 to obtain a tubular bracket with both ends covered with curing adhesive.

[0109] In a preferred embodiment, in step S6, the oven is a vacuum oven.

[0110] In a preferred embodiment, step S7 specifically involves sequentially releasing the third annular clamp 333, the annular barrel 22, the second annular clamp 332, the frustum 21, the fourth annular clamp 334, the first annular clamp 331, and the first mold 1 to obtain a tubular support with both ends covered with cured adhesive.

[0111] In a preferred embodiment, the tubular support 4 is woven from a shape memory alloy material, such as nickel-titanium wire.

[0112] In a preferred embodiment, the liquid adhesive is liquid silicone or a thermosetting adhesive. The liquid adhesive is heated and cured in an oven, covering both ends of the tubular support.

[0113] Figure 13 and Figure 14 This is an illustration of a tubular support with both ends covered with curing adhesive. After being treated with liquid adhesive, the upper and lower ends of the tubular support 4 are covered with curing adhesive 5.

[0114] Let w1 be the width of the bottom of the annular body extending radially inward, w2 be the width of the bottom of the second cylindrical body 211 extending radially outward, t be the thickness of the tubular support 4, and w3 be the width of the first glue injection groove 12, then:

[0115] w3 = w1 + w2 + t.

[0116] After the lower end of the tubular support 4 is inserted into the first glue injection groove 12, the distance from the inner wall of the tubular support 4 to the inner side wall of the first glue injection groove 12 is exactly w2, and the distance from the outer wall of the tubular support 4 to the outer side wall of the first glue injection groove 12 is w1.

[0117] After processing, the thickness of the portion 51 of the cured adhesive 5 inside the tubular support 4 is w2, and the thickness of the portion 52 of the cured adhesive 5 outside the tubular support 4 is w1.

[0118] Let the height of the annular base of the annular barrel 22 be h, and the inner diameter of the annular base be r. so ;

[0119] The height of the cylindrical base of the frustum 21 is h, and the radius of the cylindrical base is r. si ;

[0120] The inner diameter of the second glue injection groove 23 is r1, and the outer diameter of the second glue injection groove 23 is r2;

[0121] Then we have: r1 <r si r2>r so .

[0122] Let b be the height of the portion of the cured adhesive 5 covering the end of the tubular support 4 after treatment, and a be the height of the portion of the cured adhesive 5 extending outward from the end of the tubular support 4.

[0123] The height of the first glue injection tank 12 is z, the height of the second glue injection tank 23 is x, and the height of the frustum 21 is y;

[0124] Then we have:

[0125] x>a+b,

[0126] y>x+h,

[0127] z>a+b.

[0128] By designing the dimensions of each component of the tubular support end treatment device, the coating effect of the cured adhesive 5 on the end of the tubular support 4 can be precisely adjusted. For different working conditions, the dimensions of each component of the tubular support end treatment device can be precisely set to achieve the preset coating effect.

[0129] In a preferred embodiment,

[0130] x = 10~26mm

[0131] y = 90~120mm

[0132] z = 10~30mm

[0133] a = 1~10mm

[0134] b = 2~16mm

[0135] w1 = 0.5–4 mm

[0136] w2 = 0.5–4 mm

[0137] h = 2-4 mm.

[0138] Experiments show that the tubular support obtained after processing with the embodiments of this application, with both ends covered with cured adhesive, has smooth ends without exposed filaments, resulting in an aesthetically pleasing finished product with reliable performance. It will not cause problems such as frayed edges or abnormal tissue proliferation during use.

[0139] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0140] 1. By coating the ends of the tubular scaffold with liquid adhesive and then curing it, the ends of the tubular scaffold are covered with cured adhesive. This solves the technical problem in existing technologies where cutting after continuous weaving exposes many filaments at both ends of the tubular scaffold, which not only affects the appearance of the finished product but also easily leads to fraying and stimulation of abnormal tissue proliferation. The treated tubular scaffold has smooth ends with no exposed filaments, resulting in an aesthetically pleasing finished product that does not experience fraying or stimulation of abnormal tissue proliferation during use.

[0141] 2. The tubular support end treatment device provided in this application can precisely treat the end of the tubular support. By designing the dimensions of each component of the tubular support end treatment device, the coating effect of the cured adhesive on the end of the tubular support can be precisely adjusted, avoiding the defects of manual treatment that cannot accurately control the coating effect.

[0142] 3. The tubular support end treatment device provided in this application, through the different structural designs of the upper and lower molds, especially the ingenious design of the upper mold and its fixing method on the support frame, can simultaneously cure the liquid adhesive at both ends of the tubular support at one time, avoiding the defects of manually heating both ends one after another, which wastes time and cost; at the same time, it also avoids the defects of shrinkage and deformation of the structure that has already been heated at the first end when the second end is heated.

[0143] 4. The tubular support end treatment method provided in this application removes air bubbles in the liquid adhesive in the first and second injection tanks by vacuuming, which can avoid the presence of air bubbles in the cured adhesive after heating, thus affecting the aesthetics of the finished product.

[0144] 5. The tubular stent end treatment device provided in this application has a simple structure, is easy to operate, has low cost, saves time and labor, has good treatment effect, is easy to standardize and scale up, and is suitable for widespread use.

[0145] It should be understood that although quantifiers such as "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit.

[0146] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0147] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this application. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this application are equivalent embodiments of this application; furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this application still fall within the scope of the technical solution of this application.

Claims

1. A tubular stent end finishing device characterized by, include: The first mold includes a first cylindrical body, on which an annular first injection groove is formed; The second mold includes a frustum and an annular barrel. The frustum includes a second cylindrical body, the bottom of which extends radially outward to form a cylindrical base with a diameter larger than that of the second cylindrical body. The annular barrel includes an annular body, the bottom of which extends radially inward to form an annular base with a diameter smaller than that of the annular body. The annular barrel is configured to be coaxially disposed on the lower outer periphery of the frustum. A gap is provided between the inner wall of the annular base and the outer wall of the cylindrical base, and the gap matches the thickness of the tubular support. The second end of the tubular support is configured to be engaged between the inner wall of the annular base and the outer wall of the cylindrical base. An annular second injection groove is formed between the annular barrel and the frustum. A support frame is used to fix the first mold, the second mold, and the tubular support to be processed. The tubular support is configured such that: a first end is inserted into a first injection groove on the first mold, and a second end is inserted into a second injection groove on the second mold.

2. The tubular support end processing device as described in claim 1, characterized in that, The support frame includes: Base; A support rod is provided on the base; An annular clamping assembly, located on the support rod, is used to fix the first mold, the second mold, and the tubular support to be processed.

3. The tubular support end processing device as described in claim 2, characterized in that, The support rod is arranged perpendicularly to the base; and The annular clamp is arranged parallel to the base.

4. The tubular support end treatment device as described in any one of claims 2 or 3, characterized in that, The annular barrel is composed of two semi-circular barrels that are snapped together, and the snapping surfaces of the two semi-circular barrels are provided with matching protrusions and grooves.

5. The tubular support end treatment device as described in claim 4, characterized in that, Let w1 be the width of the bottom of the annular body extending radially inward, w2 be the width of the bottom of the second cylindrical body extending radially outward, t be the thickness of the tubular support, and w3 be the width of the first injection groove. Then we have: w3 = w1 + w2 + t.

6. The tubular support end treatment device as described in claim 4, characterized in that, The annular clamp assembly includes: A first annular clamp is used to fix the first mold; The second annular clamp is used to fix the frustum; The third annular clamp is used to fix the annular barrel; A fourth annular clamp is used to fix the tubular support, and the tubular support is configured such that: a first end is inserted into a first injection groove on the first mold; and a second end is engaged between the inner wall of the annular base and the outer wall of the cylindrical base, and extends into the second injection groove.

7. A method for treating the end of a tubular stent, characterized in that, The method using the tubular stent end treatment device as described in any one of claims 4 to 6 comprises the following steps: Fix the first mold on the support frame and inject liquid glue into the first glue injection groove on the first mold; Insert the first end of the tubular bracket below the liquid adhesive level in the first glue injection tank, and fix the tubular bracket to the support frame platform; The second mold is fixed to the support frame, and the second injection groove of the second mold is arranged to surround the second end of the tubular support. Liquid adhesive is injected into the second injection tank so that the second end of the tubular support is immersed in the liquid adhesive; Vacuuming is used to remove air bubbles from the liquid adhesive in the first and second dispensing tanks. The support frame, which is fixed with the first mold, the second mold and the tubular bracket, is placed in an oven for liquid adhesive curing; after curing, it is removed. Remove the first mold and the second mold, and take the tubular bracket off the support frame to obtain a tubular bracket with both ends covered with cured adhesive.

8. The method for treating the end of a tubular stent as described in claim 7, characterized in that, The step of fixing the second mold to the support frame and making the second injection groove of the second mold surround the second end of the tubular support specifically includes: Insert the lower part of the frustum into the second end of the tubular bracket and fix the frustum on the support frame. Two semi-circular ring barrels are surrounded around the second end of the tubular support to form an annular barrel; the annular barrel is fixed on the support frame; at this time, an annular second glue injection groove is formed between the annular barrel and the truncated cone; the second end of the tubular support is engaged between the inner wall of the annular base of the annular barrel and the outer wall of the cylindrical base of the truncated cone, and extends into the second glue injection groove.

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