Machining die for artificial heart valve stent

Abstract

The utility model discloses a machining die for an artificial heart valve support, which belongs to the technical field of production and machining of medical instruments, and comprises a support main body and a die-casting main body, the die-casting main body comprises at least two hold-down units, each hold-down unit comprises a first hold-down component and a second hold-down component, and the first hold-down component and the second hold-down component are arranged in the axial direction of the support main body. The first pressing and holding assembly and the second pressing and holding assembly are detachably connected. The first pressing assembly comprises a first pressing piece and a fixed anchor pressing piece, the fixed anchor pressing piece is arranged on the outer wall of the first pressing piece, the side, close to the fixed anchor pressing piece, of the first pressing piece is provided with a first protruding structure and a positioning groove, the first protruding structure is arranged in the positioning groove, and the fixed anchor pressing piece is provided with a second protruding structure corresponding to the first protruding structure. The inner wall and the outer wall of the fixing anchor are extruded and shaped through the first protruding structure and the second protruding structure respectively, so that the main body of the artificial heart valve stent and the fixing anchor are simultaneously machined at a time through the machining die, and the machining production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of medical device manufacturing and processing, and in particular to a processing mold for artificial heart valve stents. Background Technology

[0002] Artificial heart valve stents are implantable cardiac interventional medical devices used to treat heart valve diseases or defects. They are generally made of nickel-titanium alloy. Artificial heart valve stents are shaped into various forms through heat treatment. Due to the complex and irregular shapes of artificial heart valve stents, the types of molds currently used for their fabrication are relatively limited.

[0003] In existing processing molds, artificial heart valve stents can generally be processed as a whole, but the fixing anchors of artificial heart valve stents are usually processed separately. This makes the processing procedure of artificial heart valve stents complicated and makes it impossible to complete the processing and production in one go. Summary of the Invention

[0004] The purpose of this invention is to improve the problem that existing processing molds cannot process the main body and fixing anchor of artificial heart valve stents in one go, and to provide a processing mold for artificial heart valve stents.

[0005] The technical solutions for achieving the above objectives include the following:

[0006] A processing mold for an artificial heart valve stent, the processing mold comprising:

[0007] The support body and the die-casting body are fitted onto the support body and are detachably connected to the support body. There is a machining gap between the die-casting body and the support body.

[0008] The die-casting body includes at least two holding units, which are detachably mounted on the support body in the circumferential direction; each holding unit includes a first holding component and a second holding component, which are detachably connected in the axial direction of the support body.

[0009] The first pressing assembly includes a first pressing plate and a fixed anchor plate. The fixed anchor plate is disposed on the outer wall of the first pressing plate. The first pressing plate has a first protrusion structure and a positioning groove on the side near the fixed anchor plate. The first protrusion structure is disposed in the positioning groove. The fixed anchor plate has a second protrusion structure corresponding to the first protrusion structure.

[0010] In one embodiment, the first protrusion structure and the second protrusion structure are staggered in the axial direction of the support body.

[0011] In one embodiment, the first pressure plate is at least partially recessed inward to form the positioning groove;

[0012] The first protrusion structure includes a first extrusion block and a second extrusion block. The width of the second extrusion block is smaller than the width of the first extrusion block. The first extrusion block is installed on the bottom wall of the positioning groove, and the second extrusion block is installed on the first extrusion block. The second extrusion block is located close to the center of the first extrusion block.

[0013] In one embodiment, the second extrusion block has an arc-shaped structure and has a first abutting surface and a second abutting surface. The first abutting surface is an outer arc surface and abuts against the inner wall of the fixed anchor plate. The second abutting surface is used to abut against the fixed anchor.

[0014] In one embodiment, the fixed anchor plate is arc-shaped, and the second protrusion structure is disposed on the inner side of the fixed anchor plate and extends along the arc-shaped edge of the fixed anchor plate.

[0015] In one embodiment, the support body includes a first support column, a second support column, and a third support column, which are connected in sequence. The first support column is at least partially conical in structure, and the diameter of the middle part of the first support column is larger than the diameter of the second support column, and the diameter of the third support column is larger than the diameter of the second support column.

[0016] In one embodiment, the second pressing assembly includes a second pressing plate and a third pressing plate, the second pressing plate cooperating with a first support column, and the third pressing plate cooperating with a second support column; both ends of the first pressing plate are respectively cooperating with the second support column and the third support column.

[0017] In one embodiment, there are two first pressure plates, and the two ends of the fixed anchor pressure plate are respectively fixed to the two first pressure plates;

[0018] The sum of the widths of the two first pressing tablets is equal to the width of the third pressing tablet.

[0019] In one embodiment, the first pressing plate has a first fixing hole and two second fixing holes, the two second fixing holes being disposed below the first fixing hole and respectively located on both sides of the first fixing hole;

[0020] Both the first fixing hole and the second fixing hole are used for fasteners to pass through, so that the first pressure plate is fixed on the third support column.

[0021] In one embodiment, the fixed anchor plate has two third fixing holes, which are disposed at both ends of the fixed anchor plate, and both first plates have through holes corresponding to the third fixing holes;

[0022] Both the third fixing hole and the through hole are for fasteners to pass through, so that the fixing anchor plate and the first pressure plate are both fixed on the third support column.

[0023] The technical solution provided by this utility model has the following advantages and effects:

[0024] A semi-finished artificial heart valve stent is fitted onto a support body, and then a die-cast body is installed on the outside of the support body. The artificial heart valve stent is located within the processing gap and is fixed by fasteners. The tightness between the die-cast body and the support body is adjusted, and the semi-finished artificial heart valve stent is shaped. Then, the fixing anchor of the artificial heart valve stent is placed in a positioning groove. The inner wall of the fixing anchor is shaped by extrusion using a first protrusion structure, and the outer wall of the fixing anchor is shaped by extrusion using a second protrusion structure, so that the fixing anchor is processed into the required shape. This processing method allows the artificial heart valve stent body and the fixing anchor to be processed simultaneously in one operation, eliminating the need to process the fixing anchor separately, thus greatly improving the processing and production efficiency of artificial heart valve stents. Attached Figure Description

[0025] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.

[0026] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0027] Figure 1 This is a schematic diagram of the processing mold in one embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the processing mold in one embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the pressing unit in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of a fixed anchor plate in one embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the first compression tablet in one embodiment of the present invention;

[0032] Figure 6 This is one embodiment of the present invention. Figure 5 Enlarged view of point A;

[0033] Figure 7This is a schematic diagram of an artificial heart valve stent in one embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of a fixed anchor in one embodiment of the present invention;

[0035] Explanation of reference numerals in the attached figures:

[0036] 100. Mold processing;

[0037] 1. Main support structure; 11. First support column; 12. Second support column; 13. Third support column;

[0038] 2. Die-casting body; 20. Holding unit;

[0039] 21. First pressing assembly; 211. First pressing plate; 2111. First fixing hole; 2112. Second fixing hole; 2113. Positioning groove; 2110. First protruding structure; 2114. First extrusion block; 2115. Second extrusion block; 21151. First abutting surface; 21152. Second abutting surface; 212. Fixed anchor plate; 2121. Third fixing hole; 2122. Second protruding structure;

[0040] 22. Second pressing assembly; 221. Second pressing plate; 2211. Fourth fixing hole; 2212. Fifth fixing hole; 222. Third pressing plate; 2221. Sixth fixing hole;

[0041] 3. Machining clearance;

[0042] 200. Artificial heart valve stent; 201. Fixing anchor; 202. Clearance hole. Detailed Implementation

[0043] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0044] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0045] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0046] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0047] This utility model proposes a processing mold 100 for an artificial heart valve stent 200, such as... Figures 1 to 6 As shown, it includes: a support body 1 and a die-casting body 2. The die-casting body 2 is sleeved on the support body 1 and is detachably fitted with the support body 1. There is a machining gap 3 between the die-casting body 2 and the support body 1. The die-casting body 2 includes at least two holding units 20. In the circumferential direction of the support body 1, the two holding units 20 are detachably installed on the support body 1. The holding unit 20 includes a first holding assembly 21 and a second holding assembly 22. In the axial direction of the support body 1, the first holding assembly 21 is detachably installed on the support body 1. 1. The second pressing component 22 is detachably connected; the first pressing component 21 includes a first pressing plate 211 and a fixed anchor plate 212. The fixed anchor plate 212 is disposed on the outer wall of the first pressing plate 211. The first pressing plate 211 has a first protrusion structure 2110 and a positioning groove 2113 on the side near the fixed anchor plate 212. The first protrusion structure 2110 is disposed in the positioning groove 2113. The fixed anchor plate 212 has a second protrusion structure 2122 corresponding to the first protrusion structure 2110.

[0048] Specifically, in processing the artificial heart valve stent 200, the artificial heart valve stent 200 is first pre-supported using mold columns of different specifications, including preheating and precooling processes, to give the artificial heart valve stent 200 a rough shape. At this point, the artificial heart valve stent 200 is a semi-finished product. The semi-finished artificial heart valve stent 200 is fitted onto the support body 1, and then the die-casting body 2 is installed outside the support body 1. The artificial heart valve stent 200 is located within the processing gap 3, and is fixed by fasteners. The tightness between the die-casting body 2 and the support body 1 is adjusted, and the semi-finished artificial heart valve stent 200 is shaped. Then, the fixing anchor 201 of the artificial heart valve stent 200 is placed in the positioning groove 2113. The inner wall of the fixing anchor 201 is extruded and shaped using the first protrusion structure 2110, and the outer wall of the fixing anchor 201 is extruded and shaped using the second protrusion structure 2122, so that the fixing anchor 201 is processed into the required shape. The processing method provided by this processing mold allows the main body of the artificial heart valve stent 200 and the fixing anchor 201 to be processed simultaneously by the processing mold 100 in one go, without the need to process the fixing anchor 201 separately, which greatly improves the processing and production efficiency of the artificial heart valve stent 200.

[0049] Furthermore, through Figure 7 As can be seen, the artificial heart valve stent 200 has an irregular cylindrical structure. Therefore, the artificial heart valve stent 200 has different diameters. In order to process cylindrical structures of different regularity, the die-cast body 2 is set as three detachably connected pressing units 20. Moreover, each pressing unit 20 is set as a first pressing component 21 and a second pressing component 22 that are detachably connected. The multiple unit splicing method facilitates the assembly and processing of the mold 100, further improving the processing efficiency of the artificial heart valve stent 200.

[0050] Preferably, the first protruding structure 2110 and the second protruding structure 2122 are staggered along the axial direction of the supporting body 1. Specifically, by staggering the first protruding structure 2110 and the second protruding structure 2122, the fixed anchor 201 is shaped and processed along the axial direction of the supporting body 1; the outer end of the fixed anchor 201 processed in this way has a larger abutment surface that abuts against the skirt, thereby increasing the support area of ​​the fixed anchor 201.

[0051] In some embodiments, the first pressing plate 211 is at least partially recessed inward to form a positioning groove 2113; the first protruding structure 2110 includes a first pressing block 2114 and a second pressing block 2115, the width of the second pressing block 2115 is smaller than the width of the first pressing block 2114, the first pressing block 2114 is mounted on the bottom wall of the positioning groove 2113, the second pressing block 2115 is mounted on the first pressing block 2114, and the second pressing block 2115 is disposed close to the center of the first pressing block 2114. Specifically, the fixed anchor 201 is placed in the positioning groove 2113, and the first extrusion block 2114 is used to support the inner wall of the fixed anchor 201 and extrude force on the fixed anchor 201. The second extrusion block 2115 is used to extend into the clearance hole 202 of the fixed anchor 201, so that the two side walls of the second extrusion block 2115 abut against the two sides of the fixed anchor 201. After the fixed anchor 201 is set in the first extrusion block 2114 and the second extrusion block 2115, the fixed anchor pressure plate 212 and the first pressure plate 211 are squeezed together to realize the processing of the fixed anchor 201. At the same time, the die-casting body 2 cooperates with the support body 1 and performs shaping processing on the body of the artificial heart valve stent 200, further realizing the synchronous processing of the body of the artificial heart valve stent 200 and the fixed anchor 201.

[0052] Preferably, the second extrusion block 2115 has an arc-shaped structure and has a first abutment surface 21151 and abutment surface 21152. The first abutment surface 21151 is an outer arc surface and abuts against the inner wall of the fixed anchor plate 212. The second abutment surface 21152 is used to abut against the fixed anchor 201. Specifically, by using the first abutment surface 21151 to abut against the inner wall of the fixed anchor plate 212, the fixed anchor 201 is further avoided and positioned. The two second abutment surfaces 21152 are used to abut against the two side walls of the fixed anchor 201, thereby extruding the fixed anchor 201 from all directions and achieving precise shaping of the fixed anchor 201.

[0053] Preferably, the fixing anchor plate 212 is arc-shaped, and the second protrusion structure 2122 is disposed on the inner side of the fixing anchor plate 212 and extends along the arc-shaped edge of the fixing anchor plate 212. Specifically, the second protrusion structure 2122 is relatively wide and can completely cover the outer surface of the fixing anchor 201, thereby achieving compression and shaping of the outer surface of the fixing anchor 201.

[0054] In some embodiments, the support body 1 includes a first support column 11, a second support column 12, and a third support column 13, which are connected sequentially. The first support column 11 is at least partially conical, with a central diameter larger than that of the second support column 12, and the diameter of the third support column 13 is larger than that of the second support column 12. Specifically, the diameters of the first support column 11, the second support column 12, and the third support column 13 are set according to the shape of the main body of the artificial heart valve stent 200. The first support column 11, the second support column 12, and the third support column 13 are used to compress three different positions of the main body of the artificial heart valve stent 200, so that the shape of the main body of the artificial heart valve stent 200 meets the needs of the implantation position. The shape of the die-casting body 2 corresponds to the first support column 11, the second support column 12, and the third support column 13, so that the width of the processing gap 3 remains unchanged, ensuring that any position of the main body of the artificial heart valve stent 200 can be shaped and processed by the processing mold 100.

[0055] Preferably, the second pressing assembly 22 includes a second pressing plate 221 and a third pressing plate 222. The second pressing plate 221 cooperates with the first support column 11, and the third pressing plate 222 cooperates with the second support column 12. The two ends of the first pressing plate 211 cooperate with the second support column 12 and the third support column 13, respectively. Specifically, the second pressing plate 221 is used to shape the top of the main body of the artificial heart valve stent 200, the third pressing plate 222 is used to shape the waist of the main body of the artificial heart valve stent 200, and the first pressing plate 211 is used to shape the bottom of the main body of the artificial heart valve stent 200, further improving the dimensional accuracy of the artificial heart valve stent 200 after processing.

[0056] Preferably, there are two first pressure plates 211, and the two ends of the fixed anchor plate 212 are fixed to the two first pressure plates 211 respectively; the sum of the widths of the two first pressure plates 211 is equal to the width of the third pressure plate 222. Specifically, each first pressing assembly 21 has two first pressure plates 211, which is set according to the number of fixed anchors 201; the fixed anchor plate 212 is fixed to the two first pressure plates 211, and a single fixed anchor plate 212 is used to simultaneously compress and shape the two fixed anchors 201, thereby improving the stability of the two adjacent fixed anchors 201 being pressed; at the same time, the fixed anchor plate 212 is also fixed to the two first pressure plates 211, further improving the overall stability of the first pressing assembly 21.

[0057] Preferably, the first pressure plate 211 has a first fixing hole 2111 and two second fixing holes 2112. The two second fixing holes 2112 are located below the first fixing hole 2111 and on both sides of the first fixing hole 2111. Both the first fixing hole 2111 and the second fixing hole 2112 are used for fasteners to pass through, so that the first pressure plate 211 is fixed to the third support column 13. Specifically, by providing the first fixing hole 2111 and the two fixing holes 2112, the first pressure plate 211 and the support body 1 have three connection points at different positions, which improves the stability of the first pressure plate 211 in holding the artificial heart valve stent 200.

[0058] Preferably, the fixing anchor plate 212 has two third fixing holes 2121, which are located at both ends of the fixing anchor plate 212. Each of the two first pressure plates 211 has a through hole corresponding to the third fixing hole 2121. Both the third fixing holes 2121 and the through holes allow fasteners to pass through, so that both the fixing anchor plate 212 and the first pressure plates 211 are fixed to the third support column 13. Specifically, by providing two third fixing holes 2121, the fixing anchor plate 212 and the first pressure plates 211 are fixed to the third support column 13 using the same fastener, further improving the overall integrity of the fixing anchor plate 212 and the first pressure plates 211.

[0059] Preferably, the second pressing plate 221 also has a fourth fixing hole 2211 and two fifth fixing holes 2212. The two fifth fixing holes 2212 are located below the fourth fixing hole 2211 and are respectively located on both sides of the fourth fixing hole 2211. The third pressing plate 222 also has two sixth fixing holes 2221. The two sixth fixing holes 2221 are located at both ends of the third pressing plate 222. The fourth fixing hole 2211, the fifth fixing hole 2212, and the sixth fixing hole 2221 have the same function as the first fixing hole 2111 and the second fixing hole 2112 mentioned above, and will not be described in detail here.

[0060] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0061] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.

[0062] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A processing mold for artificial heart valve stents, characterized in that, The processing mold includes: The support body and the die-casting body are fitted onto the support body and are detachably connected to the support body. There is a machining gap between the die-casting body and the support body. The die-casting body includes at least two holding units, which are detachably mounted on the support body in the circumferential direction; each holding unit includes a first holding component and a second holding component, which are detachably connected in the axial direction of the support body. The first pressing assembly includes a first pressing plate and a fixed anchor plate. The fixed anchor plate is disposed on the outer wall of the first pressing plate. The first pressing plate has a first protrusion structure and a positioning groove on the side near the fixed anchor plate. The first protrusion structure is disposed in the positioning groove. The fixed anchor plate has a second protrusion structure corresponding to the first protrusion structure.

2. The processing mold for artificial heart valve stents as described in claim 1, characterized in that, Along the axial direction of the supporting body, the first protruding structure and the second protruding structure are staggered.

3. The processing mold for artificial heart valve stents as described in claim 2, characterized in that, The first pressure plate is at least partially recessed inward to form the positioning groove; The first protrusion structure includes a first extrusion block and a second extrusion block. The width of the second extrusion block is smaller than the width of the first extrusion block. The first extrusion block is installed on the bottom wall of the positioning groove, and the second extrusion block is installed on the first extrusion block. The second extrusion block is located close to the center of the first extrusion block.

4. The processing mold for artificial heart valve stents as described in claim 3, characterized in that, The second extrusion block has an arc-shaped structure and has a first abutting surface and a second abutting surface. The first abutting surface is an outer arc surface and abuts against the inner wall of the fixed anchor plate. The second abutting surface is used to abut against the fixed anchor.

5. The processing mold for artificial heart valve stents as described in any one of claims 1 to 4, characterized in that, The fixed anchor plate is arc-shaped, and the second protrusion structure is disposed on the inner side of the fixed anchor plate and extends along the arc-shaped edge of the fixed anchor plate.

6. The processing mold for artificial heart valve stents as described in any one of claims 1 to 4, characterized in that, The supporting body includes a first support column, a second support column, and a third support column, which are connected in sequence. The first support column is at least partially conical in structure, and the diameter of the middle part of the first support column is larger than the diameter of the second support column. The diameter of the third support column is larger than the diameter of the second support column.

7. The processing mold for artificial heart valve stents as described in claim 6, characterized in that, The second pressing assembly includes a second pressing plate and a third pressing plate. The second pressing plate cooperates with the first support column, and the third pressing plate cooperates with the second support column. The two ends of the first pressing plate cooperate with the second support column and the third support column, respectively.

8. The processing mold for artificial heart valve stents as described in claim 7, characterized in that, The number of the first pressure plates is two, and the two ends of the fixed anchor pressure plate are respectively fixed to the two first pressure plates; The sum of the widths of the two first pressing tablets is equal to the width of the third pressing tablet.

9. The processing mold for artificial heart valve stents as described in claim 8, characterized in that, The first pressure plate has a first fixing hole and two second fixing holes, the two second fixing holes being disposed below the first fixing hole and located on both sides of the first fixing hole respectively; Both the first fixing hole and the second fixing hole are used for fasteners to pass through, so that the first pressure plate is fixed on the third support column.

10. The processing mold for artificial heart valve stents as described in claim 8, characterized in that, The fixed anchor plate has two third fixing holes, which are located at both ends of the fixed anchor plate. Both first plates have through holes corresponding to the third fixing holes. Both the third fixing hole and the through hole are for fasteners to pass through, so that the fixing anchor plate and the first pressure plate are both fixed on the third support column.

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