Medical metal stent forming die and forming method

Abstract

The application relates to the technical field of medical devices, in particular to a medical metal support forming die and a forming method. The medical metal support forming die comprises a first profiling die seat, the inner side wall of which is provided with a first profiling curved surface; a positioning assembly, which is suitable for fixing a metal support to be shaped in the inner side of the first profiling die seat; a plurality of first shaping blocks, which are adjustably installed on the first profiling die seat and are suitable for step-by-step extrusion of a first layer of the metal support to be shaped to tightly adhere to the first profiling curved surface; a second profiling die seat, which is arranged above the first profiling die seat and is provided with a second profiling curved surface in the inner side wall; and a plurality of second shaping blocks, which are adjustably installed on the second profiling die seat and are suitable for step-by-step extrusion of a second layer of the metal support to be shaped to tightly adhere to the second profiling curved surface. The medical metal support forming die can avoid the fracture of a pipe material during the shaping process of the pipe material into a metal support, so as to improve the yield and processing quality of the pipe material processed into a metal support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a medical metal stent forming die and forming method. BACKGROUND

[0002] An artificial heart valve is composed of three parts of a valve leaflet, a stent and a suture ring, wherein the shape of the stent and the shape and material of the valve leaflet are key factors to determine whether the artificial heart valve has fluid mechanics performance similar to a natural valve. The reason why the artificial heart valve in the prior art does not achieve an ideal state in terms of fluid mechanics performance and durability of valve function is that the shape of the valve leaflet and the stent is unreasonable and the processing technology is backward.

[0003] The existing artificial heart valve stent forming die can only be used for space winding type three-dimensional structure forming with wire material as the raw material, and there is no forming die convenient for pipe material processing. Due to the difference in stress requirements of wire material processing and pipe material processing, the forming die for wire material processing is once pressed and formed, and when it is used for pipe material processing, the pipe material is prone to breakage in the forming process of the ring-shaped stent structure. SUMMARY

[0004] The purpose of the present application is to provide a medical metal stent forming die and forming method.

[0005] In order to solve the above technical problems, the present application provides a medical metal stent forming die, which comprises: a first profiling die seat, the inner side wall of which is provided with a first profiling curved surface; a positioning assembly adapted to fix a metal stent to be formed in the inner side of the first profiling die seat; a plurality of first forming blocks adjustably installed on the first profiling die seat and adapted to step by step extrude a first layer of the metal stent to be formed to tightly adhere to the first profiling curved surface; a second profiling die seat provided above the first profiling die seat, the inner side wall of which is provided with a second profiling curved surface; and a plurality of second forming blocks adjustably installed on the second profiling die seat and adapted to step by step extrude a second layer of the metal stent to be formed to tightly adhere to the second profiling curved surface.

[0006] Further, the upper end of the first profiling die seat is provided with a first forming block accommodating groove corresponding to each first forming block; the lower surface of the end part of the first forming block extending out of the first forming block accommodating groove is inclined along the first profiling curved surface, and a first profiling protrusion is arranged thereon; wherein the first profiling protrusion is adapted to extend into the hollow part of the first layer of the metal stent to be formed, and the two sides thereof are adapted to abut along the corresponding inner side of the metal stent to be formed; the first forming block is adapted to move step by step to the outside along the first forming block accommodating groove, so that the first profiling protrusion step by step extrudes the first layer of the metal stent to be formed on the first profiling curved surface.

[0007] Furthermore, the upper end of the second shaping mold base is provided with a second shaping block receiving groove corresponding to each of the second shaping blocks; the lower surface of the end of the second shaping block extending toward the inner side of the second shaping mold base and corresponding to the second shaping block receiving groove is inclined along the second shaping curved surface, and a second shaping protrusion is provided thereon; wherein the second shaping protrusion is adapted to extend into the hollow part of the second layer of the metal bracket to be shaped, and its two sides abut against the corresponding inner edge of the metal bracket to be shaped; the second shaping block is adapted to move outward step by step along the second shaping block receiving groove, so that the second shaping protrusion presses the second layer of the metal bracket to be shaped step by step onto the second shaping curved surface.

[0008] Furthermore, the first shaping block receiving groove is provided with a first mounting hole; the second shaping block receiving groove is provided with a second mounting hole; the first and second shaping blocks are adapted to be installed in the corresponding first and second shaping block receiving grooves by means of a fastener engaging with the corresponding first and second mounting holes; and both the first and second shaping blocks are provided with oblong countersunk holes; wherein the fastener is adapted to pass through the corresponding oblong countersunk holes and engage with the corresponding first and second mounting holes.

[0009] Furthermore, the positioning component includes: an inner support positioning block, which is detachably installed at the bottom of the first contouring mold base and is adapted to press the bottom of the metal bracket to be shaped against the first contouring curved surface.

[0010] Furthermore, the inner support positioning block includes: a base, and a boss protruding upward from the center of the base; wherein the first contouring mold seat is located on the base, and the first contouring curved surface on its inner side is adapted to cooperate with the outer edge of the boss for clamping the bottom of the metal bracket to be shaped.

[0011] Furthermore, the base is provided with at least two drainage notches; and the protrusion is provided with several drainage through holes.

[0012] Furthermore, the positioning component also includes: a plurality of positioning pieces, which are detachably mounted on the first contouring mold base, and the ends of the pieces extending out of the first contouring curved surface are adapted to be inserted into the corresponding positioning holes of the metal bracket to be shaped.

[0013] Furthermore, a step is provided on the first contouring mold base above the first contouring curved surface; the second contouring mold base is adapted to sit on the step; and the lower end of the second contouring mold base is also provided with several clearance notches, adapted to accommodate each first shaping pressure block to pass through.

[0014] Furthermore, the upper end of the first contour mold base is provided with at least two positioning grooves; and the lower end of the second contour mold base is provided with positioning protrusions that correspond one-to-one with each positioning groove.

[0015] In another aspect, the present invention also provides a method for forming a medical metal stent, comprising: fixing the bottom of a heat-treated metal stent to be shaped; distributively pressing the first layer of the metal stent to be shaped at the bottom to a preset position; distributively pressing the second layer of the metal stent to be shaped above the first layer to a preset position; and cooling the shaped metal stent to form the final shape.

[0016] Furthermore, the molding method for this medical metal stent uses the aforementioned medical metal stent molding mold.

[0017] The beneficial effect of the present invention is that the positioning component of the medical metal stent forming mold of the present invention fixes the bottom of the metal stent to be shaped on the first contour mold seat. By moving the corresponding first and second shaping blocks on the first and second contour mold seats outward in steps, the first and second shaping blocks respectively deform each part of the metal stent to be shaped by multiple short-distance extrusion to fit the corresponding first and second contour curved surfaces. This can avoid breakage during the shaping process of tubular material into metal stent, thereby improving the yield and processing quality of tubular material processed into metal stent.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the medical metal stent forming mold of the present invention after assembling the metal stent;

[0022] Figure 2 This is a top view of the medical metal stent molding die of the present invention;

[0023] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0024] Figure 4This is a perspective view of the first and second contour mold bases of the present invention;

[0025] Figure 5 This is a side view of the first and second shaping blocks of the present invention;

[0026] Figure 6 This is a partial schematic diagram showing the first conforming protrusion of the first shaping pressure block of the present invention engaging with the hollow part of the metal bracket to be shaped.

[0027] Figure 7 This is a schematic diagram of the first layer of the medical metal stent molding die of the present invention after assembling the metal stent;

[0028] Figure 8 This is a perspective view of the inner support positioning block of the present invention;

[0029] Figure 9 yes Figure 2 A cross-sectional view along the BB direction.

[0030] In the picture:

[0031] First contour mold base 1, first contour curved surface 11, first shaping pressure block receiving groove 12, first mounting hole 13, step 14, positioning groove 15, positioning component 2, positioning piece 21, inner support positioning block 22, base 221, boss 222, water leakage notch 223, water leakage through hole 224, first shaping pressure block 3, first contour protrusion 31, second contour mold base 4, second contour curved surface 41, second shaping pressure block receiving groove 42, second mounting hole 43, clearance notch 44, positioning protrusion 45, second shaping pressure block 5, second contour protrusion 51, fastener 6, waist-shaped countersunk hole 7. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1As shown, this embodiment provides a medical metal stent molding die, including: a first contouring mold base 1, the inner wall of which is provided with a first contouring curved surface 11; a positioning component 2, adapted to fix the metal stent to be shaped on the inner side of the first contouring mold base 1; a plurality of first shaping pressure blocks 3, adjustablely mounted on the first contouring mold base 1, adapted to stepwise press the first layer of the metal stent to be shaped to fit tightly against the first contouring curved surface 11; a second contouring mold base 4, disposed above the first contouring mold base 1, the inner wall of which is provided with a second contouring curved surface 41; and a plurality of second shaping pressure blocks 5, adjustablely mounted on the second contouring mold base 4, adapted to stepwise press the second layer of the metal stent to be shaped to fit tightly against the second contouring curved surface 41.

[0035] In this embodiment, the positioning component 2 of the medical metal stent forming mold fixes the bottom of the metal stent to be shaped onto the first contour mold base 1. By moving the corresponding first and second shaping blocks on the first and second contour mold bases outward in steps, the first and second shaping blocks deform each part of the metal stent to be shaped through multiple short-distance compressions to fit the corresponding first and second contour curved surfaces. This can prevent breakage during the shaping process of tubing into metal stents, thereby improving the yield and processing quality of tubing-processed metal stents.

[0036] In this embodiment, the medical metal stent forming mold adopts a layered structure, which facilitates the assembly during stent shaping. The use of separate first and second shaping blocks facilitates local adjustment of the stent forming dimensions. Before shaping, the structure of the metal stent to be shaped can be simulated, and the single deformation of the part of the metal stent to be shaped during step extrusion can be determined based on the simulation results.

[0037] In some applications, the metal bracket to be shaped is extruded and shaped in stages. The shape of the extruded part is affected by the direction of force applied during the extrusion and shaping process. Once the direction of force is changed unexpectedly, the outline of the shaped bracket will deviate significantly from that of the qualified metal bracket, thus affecting the processing quality of the metal bracket.

[0038] like Figures 2 to 4 As shown, in this embodiment, the upper end of the first shaping mold base 1 is provided with a first shaping block receiving groove 12 corresponding to each of the first shaping blocks 3; the lower surface of the end of the first shaping block 3 extending toward the inner side of the first shaping mold base 1 and corresponding to the first shaping block receiving groove 12 is inclined along the first shaping curved surface 11, and a first shaping protrusion 31 is provided thereon; wherein the first shaping protrusion 31 is adapted to extend into the hollow part of the first layer of the metal bracket to be shaped, and its two sides abut against the corresponding inner side of the metal bracket to be shaped; the first shaping block 3 is adapted to move outward step by step along the first shaping block receiving groove 12, so that the first shaping protrusion 31 presses the first layer of the metal bracket to be shaped step by step onto the first shaping curved surface 11.

[0039] In this embodiment, the outer edge of the first contouring protrusion 31 is adapted to fit the inner edge of the first hollow part of the metal bracket to be shaped, and can hook the first hollow part of the metal bracket to be shaped to ensure that the shape details of the metal bracket do not change during the extrusion shaping process; the first shaping block 3 moves outward along the first shaping block receiving groove 12, and extrudes the first layer of the metal bracket to be shaped towards the first contouring curved surface 11 through the corresponding first contouring protrusion 31, which can ensure that the direction of force applied to each part of the metal bracket to be shaped is constant during the extrusion shaping process, and avoid poor shaping effect of the metal bracket due to unexpected changes in the direction of force application.

[0040] In this embodiment, the upper end of the second shaping mold base 4 is provided with a second shaping block receiving groove 42 corresponding to each of the second shaping blocks 5; the lower surface of the end of the second shaping block 5 extending toward the inner side of the second shaping mold base 4 and corresponding to the second shaping block receiving groove 42 is inclined along the second shaping curved surface 41, and a second shaping protrusion 51 is provided thereon; wherein the second shaping protrusion 51 is adapted to extend into the hollow part of the second layer of the metal bracket to be shaped, and its two sides abut against the corresponding inner side of the metal bracket to be shaped; the second shaping block 5 is adapted to move outward step by step along the second shaping block receiving groove 42, so that the second shaping protrusion 51 presses the second layer of the metal bracket to be shaped step by step onto the second shaping curved surface 41.

[0041] In this embodiment, the outer edge of the second contouring protrusion 51 is adapted to fit the inner edge of the hollow portion of the second layer of the metal bracket to be shaped, and is used to hook the hollow portion of the second layer of the metal bracket to be shaped; the second shaping pressure block 5 moves outward along the second shaping pressure block receiving groove 42, and presses the second layer of the metal bracket to be shaped towards the second contouring curved surface 41 through the second contouring protrusion 51, so as to press and shape the second layer of the metal bracket to be shaped.

[0042] like Figures 3 to 6 As shown, in this embodiment, the first shaping block receiving groove 12 is provided with a first mounting hole 13; the second shaping block receiving groove 42 is provided with a second mounting hole 43; the first and second shaping blocks are adapted to be installed in the corresponding first and second shaping block receiving grooves by respectively engaging with the corresponding first and second mounting holes through a fastener 6; and both the first and second shaping blocks are provided with a waist-shaped countersunk hole 7; wherein the fastener 6 is adapted to pass through the corresponding waist-shaped countersunk hole 7 and engage with the corresponding first and second mounting holes.

[0043] In this embodiment, the fastener 6 passes through the countersunk holes 7 on the first and second shaping blocks and is threaded into the first and second mounting holes in the corresponding receiving grooves of the first and second shaping blocks. As the positions of the first and second shaping blocks are adjusted, the fastener 6 can be fixed at a certain position in the corresponding countersunk hole 7. This facilitates the adjustment of the deformation amount of a single extrusion during the step-by-step extrusion shaping process of the metal bracket to be shaped according to the actual situation, and avoids the bracket from breaking due to excessive deformation during the one-time forming process.

[0044] In this embodiment, the first shaping block receiving groove 12 corresponding to the first shaping block 3 and the second shaping block receiving groove 42 corresponding to the second shaping block 5 can be set according to the actual shape of the metal bracket and the shaping requirements. They can be staggered or set vertically. When the first shaping block 3 and the second shaping block 5 are set vertically, the first mounting hole 13 and the second mounting hole 43 can be staggered along the direction of the waist-shaped countersunk hole 7, which can avoid the fasteners 6 of the upper and lower layers from affecting each other.

[0045] like Figure 7 and Figure 8 As shown, in this embodiment, the positioning component 2 includes: an inner support positioning block 22, which is detachably installed at the bottom of the first contouring mold base 1 and is suitable for pressing the bottom of the metal bracket to be shaped against the first contouring curved surface 11.

[0046] In this embodiment, the inner support positioning block 22 includes: a base 221, and a boss 222 protruding upward from the middle of the base 221; wherein the first contouring mold seat 1 is located on the base 221, and the first contouring curved surface 11 on its inner side is adapted to cooperate with the outer edge of the boss 222 for clamping the bottom of the metal bracket to be shaped.

[0047] In this embodiment, the boss 222 of the inner support positioning block 22 cooperates with the first contoured curved surface 11 to clamp the bottom of the metal bracket to be shaped, which can prevent the bottom of the metal bracket to be shaped from tilting inward when the upper part of the metal bracket is squeezed and shaped, thus ensuring the roundness and diameter of the bottom of the metal bracket and improving the shaping quality of the metal bracket.

[0048] In this embodiment, the base 221 is provided with at least two drainage notches 223; and the boss 222 is provided with a plurality of drainage through holes 224. After the metal bracket to be shaped is cooled and formed with cooling water, each drainage through hole 224 can facilitate the drainage of cooling water, and each drainage notch 223 can facilitate the drainage of cooling water in the gap between the boss 222 of the inner support positioning block 22 and the first contoured curved surface 11 used to clamp the bottom of the metal bracket to be shaped.

[0049] In this embodiment, the positioning component 2 further includes: a plurality of positioning pieces 21, which are detachably mounted on the first contour mold base 1, and the ends of the pieces extending out of the first contour curved surface 11 are adapted to be inserted into the corresponding positioning holes of the metal bracket to be shaped.

[0050] In this embodiment, the positioning pieces 21 are spaced apart on the first contour mold base 1, which can fix the metal bracket to be shaped and prevent the metal bracket to be shaped from rotating axially when it is squeezed and shaped.

[0051] like Figure 9 As shown, in this embodiment, a step 14 is provided on the first contouring mold base 1 above the first contouring curved surface 11; the second contouring mold base 4 is adapted to sit on the step 14; and the lower end of the second contouring mold base 4 is also provided with a plurality of clearance notches 44, which are adapted to accommodate each first shaping pressure block 3 passing through.

[0052] In this embodiment, the lower end of the second contour mold base 4 and each clearance notch 44 are adapted to match the upper end of the first contour mold base 1 on which each first shaping pressure block 3 is installed, so that the second contour mold base 4 can be stably placed on the first contour mold base 1, thereby improving the compatibility between the second contour mold base 4 stacked on the first contour mold base 1 and the first contour mold base 1.

[0053] In this embodiment, the upper end of the first contour mold base 1 is provided with at least two positioning grooves 15; and the lower end of the second contour mold base 4 is provided with positioning protrusions 45 that correspond one-to-one with each positioning groove 15.

[0054] In this embodiment, the positioning groove 15 cooperates with the positioning protrusion 45 to facilitate the positioning and installation of the second contour mold seat 4 on the first contour mold seat 1, avoiding misalignment during installation. After installation, the second contour mold seat 4 can be locked in place on the first contour mold seat 1 through at least two countersunk holes using locking components to prevent it from separating during the extrusion and shaping process.

[0055] Example 2

[0056] Based on the above embodiment 1, this embodiment also provides a method for forming a medical metal stent, including: fixing the bottom of the heat-treated metal stent to be shaped; distributively pressing the first layer of the metal stent to be shaped at the bottom to a preset position; distributively pressing the second layer of the metal stent to be shaped above the first layer to a preset position; and cooling the shaped metal stent to form the final shape.

[0057] In this embodiment, the forming method of the medical metal stent can use the above-mentioned medical metal stent forming mold.

[0058] In this embodiment, firstly, the bottom of the heat-treated metal bracket to be shaped is fixed inside the first molding die 1 by the positioning component 2. Secondly, the first shaping protrusion 31 of each first shaping block 3 hooks onto the parts to be shaped on the first layer of the metal bracket to be shaped, and is installed in the corresponding first shaping block receiving groove 12 of the first molding die 1. Then, the second molding die 4 is installed on the first molding die 1, and the second shaping protrusion 51 of each second shaping block 5 hooks onto the parts to be shaped on the second layer of the metal bracket to be shaped, and is installed in the corresponding second shaping block receiving groove 42 of the second molding die 4. Finally, by repeatedly pulling the corresponding first and second shaping blocks outward over short distances, the parts to be shaped on each layer of the metal bracket to be shaped are squeezed and shaped step by step, and then cooled and formed by cooling water.

[0059] In this embodiment, based on the number of layers that the metal mold to be shaped needs to be shaped, an additional second conforming mold base 4 and a corresponding second shaping pressure block 5 can be added upwards to the original medical metal stent forming mold to flexibly meet the shaping requirements of the metal mold to be shaped.

[0060] In summary, the first and second shaping blocks move within their respective first and second shaping block receiving slots, ensuring a constant direction of force applied to each part of the metal bracket to be shaped during the extrusion shaping process. This prevents poor shaping results due to unexpected changes in the force direction. As the positions of the first and second shaping blocks are adjusted, the fastener 6 can be fixed at a specific position in the corresponding oblong countersunk hole 7. This allows for adjustment of the deformation amount during each step of the extrusion shaping process, preventing breakage due to excessive deformation during a single forming operation. The protrusion 222 of the inner support positioning block 22 cooperates with the first contoured curved surface 11 to clamp the bottom of the metal bracket to be shaped. This prevents the bottom of the metal bracket from warping inwards during the extrusion shaping process, ensuring the roundness and diameter of the metal bracket's bottom and improving the shaping quality. Each drainage hole 224 facilitates the drainage of cooling water, and each drainage notch 223 facilitates the drainage of cooling water from the gap between the protrusion 222 of the inner support positioning block 22 and the first contouring surface 11 used to clamp the bottom of the metal bracket to be shaped. The positioning pieces 21 are spaced apart on the first contouring mold base 1 to prevent the metal bracket to be shaped from rotating axially during extrusion shaping. The positioning groove 15 cooperates with the positioning protrusion 45 to facilitate the positioning and installation of the second contouring mold base 4 on the first contouring mold base 1, avoiding misalignment. After installation, it can be locked onto the first contouring mold base 1 by using locking components through at least two countersunk holes on the second contouring mold base 4 to prevent it from separating during extrusion shaping.

[0061] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A medical metal stent forming mold characterized by comprising: The utility model relates to a medical metal support forming die which comprises: a first profiling die seat (1) with a first profiling curve (11) on its inner side wall; a positioning assembly (2) adapted to fix a metal support to be shaped on the inner side of the first profiling die seat (1); a plurality of first shaping blocks (3) adjustably installed on the first profiling die seat (1) and adapted to extrude a first layer of the metal support to be shaped step by step to tightly adhere to the first profiling curve (11); a second profiling die seat (4) disposed above the first profiling die seat (1) and having a second profiling curve (41) on its inner side wall; and a plurality of second shaping blocks (5) adjustably installed on the second profiling die seat (4) and adapted to extrude a second layer of the metal support to be shaped step by step to tightly adhere to the second profiling curve (41). The upper end of the first profiling die seat (1) is provided with a first shaping block (3) accommodating groove (12) corresponding to each first shaping block (3); The lower surface of the end of the first shaping block (3) extending into the first shaping block (3) accommodating groove (12) is obliquely disposed along the first profiling curve (11) and is provided with a first profiling protrusion (31) thereon; wherein The first profiling protrusion (31) is adapted to extend into the hollow portion of the first layer of the metal support to be shaped and abuts against the corresponding inner side of the metal support to be shaped on both sides thereof; The first shaping block (3) is adapted to move step by step outward along the first shaping block (3) accommodating groove (12) so that the first profiling protrusion (31) extrudes the first layer of the metal support to be shaped step by step on the first profiling curve (11); The upper end of the second profiling die seat (4) is provided with a second shaping block (5) accommodating groove (42) corresponding to each second shaping block (5); The lower surface of the end of the second shaping block (5) extending into the second shaping block (5) accommodating groove (42) is obliquely disposed along the second profiling curve (41) and is provided with a second profiling protrusion (51) thereon; wherein The second profiling protrusion (51) is adapted to extend into the hollow portion of the second layer of the metal support to be shaped and abuts against the corresponding inner side of the metal support to be shaped on both sides thereof; The second shaping block (5) is adapted to move step by step outward along the second shaping block (5) accommodating groove (42) so that the second profiling protrusion (51) extrudes the second layer of the metal support to be shaped step by step on the second profiling curve (41).

2. The medical metal support forming die according to claim 1, wherein A first mounting hole (13) is disposed in the first shaping block (3) accommodating groove (12); A second mounting hole (43) is disposed in the second shaping block (5) accommodating groove (42); The first and second shaping blocks (5) are adapted to be installed in the first and second shaping block (5) accommodating grooves, respectively, by cooperating with the corresponding first and second mounting holes through a fastener (6); and A waist-shaped counterbore (7) is formed on each of the first and second shaping blocks (5); wherein The fasteners (6) are adapted to cooperate with the corresponding first and second mounting holes through the corresponding waist-shaped counterbores (7).

3. The medical metal stent forming mold according to claim 1, characterized in that, The positioning assembly (2) comprises: An inner support positioning block (22) detachably mounted on the bottom of the first profiling mold base (1) and adapted to abut the bottom of the metal stent to be profiled against the first profiling curved surface (11).

4. The medical metal stent forming mold according to claim 3, characterized in that, The inner support positioning block (22) comprises a base (221) and a boss (222) upwardly protruding from the middle of the base (221); wherein The first profiling mold base (1) is seated on the base (221), and the first profiling curved surface (11) on the inner side thereof is adapted to cooperate with the outer edge of the boss (222) for clamping the bottom of the metal stent to be profiled.

5. The medical metal stent forming mold according to claim 4, characterized in that, The base (221) is provided with at least two water leakage notches (223); and The boss (222) is provided with a plurality of water leakage through holes (224).

6. The medical metal stent forming mold according to claim 3, characterized in that, The positioning assembly (2) further comprises a plurality of positioning pieces (21) detachably mounted on the first profiling mold base (1) and adapted to be inserted into the corresponding positioning holes of the metal stent to be profiled.

7. The medical metal stent forming mold according to claim 1, characterized in that, The first profiling mold base (1) is provided with a step (14) above the first profiling curved surface (11); The second profiling mold base (4) is adapted to be seated on the step (14); and The lower end of the second profiling mold base (4) is further provided with a plurality of avoiding notches (44) adapted to accommodate the first profiling blocks (3) to pass through.

8. The medical metal stent forming mold according to claim 7, characterized in that, The upper end of the first profiling mold base (1) is further provided with at least two positioning grooves (15); and The lower end of the second profiling mold base (4) is provided with a positioning boss (45) corresponding to each positioning groove (15).

9. A method of forming a medical metal stent using the medical metal stent forming mold according to any one of claims 1 to 8, characterized by, comprises: fixing the bottom of the metal stent to be profiled after heat treatment; gradually extruding the first layer of the metal stent to be profiled on the bottom to a preset position; gradually extruding the second layer of the metal stent to be profiled above the first layer to a preset position; cooling the profiled metal stent to form.

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