A 3D printing device for preparing cardiovascular stents

Abstract

The utility model discloses a 3D printing device for preparing a cardiovascular stent, comprising: a base, and a molding winding mechanism and a spinning mechanism installed on the base; the molding winding mechanism comprises: a first mounting seat, a second mounting seat, and a rotating shaft assembly installed between the first mounting seat and the second mounting seat; a mounting shaft for fixing the rotating shaft assembly is arranged on one side of the first mounting seat, and an air pump connected to the inside of the rotating shaft assembly is arranged at the second mounting seat; the rotating shaft assembly comprises: a plug-in shaft, a limit plate, a deformable layer and a rotating shaft blade plate group; there is a gap between the plug-in shaft and the rotating shaft blade plate group, and an air supply pipe connected to the gap is arranged at the output end of the air pump. The air pump supplies air to the gap between the rotating shaft blade plate group and the plug-in shaft through the air supply pipe, and can accurately change the inner diameter of the rotating shaft formed by the rotating shaft blade plate group, thereby adjusting the size of the entire rotating shaft assembly.

Description

Technical Field

[0001] The utility model relates to a 3D printing device, in particular to a 3D printing device for preparing a cardiovascular stent. Background Art

[0002] Cardiovascular stents play a vital role in the treatment of cardiovascular diseases. They are mainly used in the treatment of cardiovascular diseases such as coronary heart disease, peripheral vascular disease, and cerebrovascular disease. They support the diseased blood vessels, prevent blood vessel collapse, and restore blood circulation, thereby alleviating patients' symptoms and improving their quality of life. Traditional cardiovascular stents mostly use standardized designs and cannot meet the specific cardiovascular structural needs of each patient. This "one-size-fits-all" treatment method may lead to complications such as restenosis and thrombosis during long-term use, affecting the treatment effect and the patient's quality of life.

[0003] 3D printing technology can be used to perform personalized design based on the patient's specific cardiovascular structure data, and produce a stent that fully matches the patient's cardiovascular morphology. This personalized design can better adapt to the patient's lesion morphology, improve treatment effects, and reduce the occurrence of postoperative complications.

[0004] In the prior art, the 3D printed cardiovascular stent device used for cardiovascular stents usually includes a base, a molding and winding mechanism, and a spinneret mechanism. The molding and winding mechanism is responsible for manufacturing the basic shape of the stent according to the design data, while the spinneret mechanism is responsible for printing the material layer by layer on the stent to form the final stent structure.

[0005] However, the existing 3D printed cardiovascular stent devices have the following technical problems during the printing process:

[0006] (1) In the molding and winding mechanism of the existing 3D printed cardiovascular stent device, the winding roller is usually a solid columnar body, so each winding roller can only be used to manufacture stents of fixed specifications and sizes.

[0007] (2) When the existing 3D printing cardiovascular stent device needs to print cardiovascular stents of different specifications and sizes, the corresponding winding roller must be replaced before printing, which increases the complexity and time cost of the operation.

[0008] Therefore, there is an urgent need for a 3D printing device for preparing cardiovascular stents to solve the technical problems existing in the prior art. Summary of the invention

[0009] The utility model overcomes the deficiencies of the prior art and provides a 3D printing device for preparing a cardiovascular stent.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a 3D printing device for preparing a cardiovascular stent, comprising: a base, a forming and winding mechanism installed on the base, and a spinning mechanism;

[0011] The forming and winding mechanism comprises: a first mounting seat, a second mounting seat and a rotating shaft assembly mounted between the first mounting seat and the second mounting seat; a mounting shaft for fixing the rotating shaft assembly is arranged on one side of the first mounting seat, and an air pump connected to the interior of the rotating shaft assembly is arranged at the second mounting seat;

[0012] The rotating shaft assembly comprises: a plug-in shaft, a limit plate, a deformable layer and a rotating shaft blade plate group; there is a gap between the plug-in shaft and the rotating shaft blade plate group, an air delivery pipe communicating with the gap is provided at the output end of the air pump, and the deformable layer is sleeved on the surface of the rotating shaft blade plate group;

[0013] The rotating shaft blade group is composed of a plurality of rotating blades, one end of each rotating blade is provided with a latch, and the interior of each rotating blade has a slide groove matched with the latch.

[0014] In a preferred embodiment of the present invention, there are at least three rotating blades, and the rotating blades are made of stainless steel, aluminum alloy or carbon fiber composite material.

[0015] In a preferred embodiment of the present invention, the thickness of the deformable layer is 0.2-0.4 cm, and the deformable layer is made of silica gel or high molecular elastomer.

[0016] In a preferred embodiment of the present invention, the cross-section of the end of the latch is T-shaped, and one end of the slide slot has a groove matched with the end of the latch.

[0017] In a preferred embodiment of the utility model, an operating table is arranged on the top of the first mounting seat, a transmission shaft is arranged on one side of the first mounting seat, the transmission shaft and the mounting shaft are connected by a shaft sleeve, and a support seat is arranged between the transmission shaft and the mounting shaft.

[0018] In a preferred embodiment of the utility model, the base is provided with a slide rail, and the first mounting seat, the second mounting seat and the supporting seat are all slidably connected to the slide rail.

[0019] In a preferred embodiment of the present invention, the inner diameter of the rotating shaft formed by the deformable layer before deformation is 1-2 mm, and the inner diameter after deformation is 5-6 mm.

[0020] In a preferred embodiment of the utility model, the spinning mechanism comprises: a fixed seat, a telescopic column and a nozzle, a fixed plate parallel to the rotating shaft assembly is arranged on the top of the telescopic column, and the nozzle is slidably connected to the fixed plate.

[0021] In a preferred embodiment of the present invention, both ends of the plug-in shaft are provided with the limiting plates, and the ends of the rotating blades are in contact with the limiting plates.

[0022] In a preferred embodiment of the present invention, the maximum inner diameter of the rotating shaft formed by the rotating blade is smaller than the inner diameter of the limiting plate.

[0023] The utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0024] (1) The utility model is provided with a deformable layer, a rotating shaft blade plate group, and an air pump. When in use, the air pump supplies air to the gap between the rotating shaft blade plate group and the plug-in shaft through the air supply pipe, which can accurately change the inner diameter of the rotating shaft formed by the rotating shaft blade plate group, thereby adjusting the size of the entire rotating shaft assembly. The variability enables the device to prepare a cardiovascular stent that is highly matched with the patient's cardiovascular morphology, reduces friction and damage between the stent and the blood vessel wall, and improves the adaptability and stability of the stent.

[0025] (2) The utility model provides a latch and a slide groove at the rotating blade plate, and when in use, each rotating blade plate slides in the slide groove through the latch, thereby changing its angle and position. This enhances the flexibility and adjustability of the rotating shaft assembly, so that the device can adapt to cardiovascular structures of different shapes and sizes, and increases the flexibility and controllability during the preparation process.

[0026] (3) The utility model is provided with a telescopic column and a slide rail, and when in use, the spinneret mechanism changes in the vertical direction of the telescopic column to adjust the distance between the nozzle and the forming winding mechanism, so that the relative position of the nozzle and the rotating shaft assembly can be accurately controlled to achieve accurate printing of the cardiovascular stent. At the same time, the first mounting seat, the second mounting seat, and the support seat can all slide on the slide rail, thereby ensuring stability and accuracy during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the structure of the rotating shaft assembly of the utility model;

[0030] Figure 3 It is a schematic diagram of the exploded structure of the rotating shaft assembly of the utility model;

[0031] Figure 4 This is a cross-sectional structural diagram of the rotating shaft blade assembly of the utility model;

[0032] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0033] In the figure: 1. base; 2. slide rail; 3. first mounting seat; 4. operating table; 5. transmission shaft; 6. bushing; 7. mounting shaft; 8. rotating shaft assembly; 8.1. plug-in shaft; 8.2. limit plate; 8.3. deformable layer; 8.4. rotating shaft blade group; 8.4.1. rotating blade; 8.4.2. latch; 8.4.3. slide groove; 9. fixing bolt; 10. second mounting seat; 11. air pump; 12. air pipe; 13. fixing seat; 14. telescopic column; 15. nozzle; 16. supporting seat. DETAILED DESCRIPTION

[0034] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0035] like Figure 1 As shown, a 3D printing device for preparing a cardiovascular stent includes: a base 1, and a molding and winding mechanism and a spinning mechanism installed on the base 1.

[0036] An operating table 4 is arranged on the top of the first mounting seat 3, a transmission shaft 5 is arranged on one side of the first mounting seat 3, the transmission shaft 5 is connected to the mounting shaft 7 through a shaft sleeve 6, and a support seat 16 is arranged between the transmission shaft 5 and the mounting shaft 7. A slide rail 2 is arranged at the base 1, and the first mounting seat 3, the second mounting seat 10, and the support seat 16 are all slidably connected to the slide rail 2.

[0037] The molding and winding mechanism includes: a first mounting seat 3, a second mounting seat 10, and a rotating shaft assembly 8 installed between the first mounting seat 3 and the second mounting seat 10; a mounting shaft 7 for fixing the rotating shaft assembly 8 is provided on one side of the first mounting seat 3, and an air pump 11 connected to the inside of the rotating shaft assembly 8 is provided at the second mounting seat 10.

[0038] In one embodiment, the rotating shaft assembly 8 is connected to the first mounting seat 3 via a fixing bolt 9 .

[0039] The spinning mechanism comprises: a fixed seat 13, a telescopic column 14 and a nozzle 15. A fixed plate parallel to the rotating shaft assembly 8 is arranged on the top of the telescopic column 14, and the nozzle 15 is slidably connected to the fixed plate.

[0040] like Figure 2 As shown, the rotating shaft assembly 8 includes: a plug-in shaft 8.1, a stopper plate 8.2, a deformable layer 8.3 and a rotating shaft blade plate group 8.4; there is a gap between the plug-in shaft 8.1 and the rotating shaft blade plate group 8.4, and the output end of the air pump 11 is provided with an air delivery pipe 12 connected to the gap, and the deformable layer 8.3 is sleeved on the surface of the rotating shaft blade plate group 8.4. Thus, the personalized cardiovascular stent can better adapt to the patient's cardiovascular morphology, reduce the friction and damage between the stent and the blood vessel wall, and improve the adaptability and stability of the stent.

[0041] The rotating shaft blade group 8.4 is composed of a plurality of rotating blades 8.4.1, each of which is provided with a latch 8.4.2 at one end, and each of which is provided with a slide groove 8.4.3 adapted to the latch 8.4.2. Both ends of the plug shaft 8.1 are provided with a limit plate 8.2, and the ends of the rotating blades 8.4.1 are in contact with the limit plates 8.2. By adjusting the position of the latch in the slide groove, the angle and position of the rotating blade can be precisely controlled, thereby achieving precise control of the entire structure. At the same time, the adjustability during the stent printing process can ensure that the stent better adapts to the complex structure of the patient's cardiovascular system.

[0042] There are at least three rotating blades 8.4.1, which are made of stainless steel or aluminum alloy or carbon fiber composite material. The thickness of the deformable layer 8.3 is 0.2-0.4 cm, and the deformable layer 8.3 is made of silica gel or polymer elastomer.

[0043] In a preferred embodiment, the deformable layer 8.3 is made of silicone. The preparation process is as follows: prepare a certain amount of liquid silicone raw material, and add a silane crosslinker to the silicone raw material at a mass ratio of 4:1 to improve the high elasticity of the silicone. Then, the silicone raw material with the crosslinker added is mixed with a plasticizer at a mass ratio of 5:1 to prepare a silicone mixture. Then, the silicone mixture is placed in a pipe mold, and after a pressurized cooling treatment, a deformable layer with an inner diameter of 1 to 2 mm is finally prepared. The deformable layer is then sleeved on the outside of the rotating shaft blade group 8.4 for use in subsequent bracket printing.

[0044] The end cross section of the latch 8.4.2 is T-shaped, and one end of the slide slot 8.4.3 has a groove that matches the end of the latch 8.4.2. The inner diameter of the deformable layer 8.3 before deformation is 1 to 2 mm, and the inner diameter after deformation is 5 to 6 mm. The maximum inner diameter formed by the rotating blade 8.4.1 is smaller than the inner diameter of the limit plate 8.2.

[0045] When the utility model is used, a forming winding mechanism consisting of a first mounting seat 3, a second mounting seat 10, and a rotating shaft assembly 8 and a spinning mechanism consisting of a fixed seat 13, a telescopic column 14, and a nozzle 15 are sequentially mounted on the base 1. The rotating shaft assembly 8 consists of a plug-in shaft 8.1, a limit plate 8.2, a deformable layer 8.3, and a rotating shaft blade assembly 8.4, and a gap is left between the rotating shaft blade assembly 8.4 and the plug-in shaft 8.1.

[0046] The air pump 11 supplies air to the gap between the rotating shaft blade set 8.4 and the plug shaft 8.1 through the air supply pipe 12, so that the latch 8.4.2 at one end of the rotating blade set 8.4.1 can slide in the slide groove 8.4.3, thereby changing the inner diameter of the rotating shaft blade set 8.4, thereby achieving the effect of deformation of the deformable layer, thereby changing the inner diameter formed by the rotating shaft blade set. This change allows the preparation requirements of cardiovascular stents of different sizes to be met.

[0047] The transmission shaft 5 is connected to the installation shaft 7 through the shaft sleeve 6, and the driving device drives the installation shaft 7 and the rotating shaft assembly 8 to rotate. This rotational motion allows the rotating shaft blade assembly 8.4 to perform the forming and winding of the cardiovascular stent during the rotation process.

[0048] The nozzle 15 of the spinneret mechanism slides along the fixed plate, and the relative position of the nozzle 15 and the rotating shaft assembly 8 is precisely controlled, so as to print the cardiovascular stent.

[0049] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A 3D printing device for preparing a cardiovascular stent, comprising: A base, a forming and winding mechanism and a spinning mechanism installed on the base, characterized in that: The forming and winding mechanism comprises: a first mounting seat, a second mounting seat and a rotating shaft assembly mounted between the first mounting seat and the second mounting seat; a mounting shaft for fixing the rotating shaft assembly is arranged on one side of the first mounting seat, and an air pump connected to the interior of the rotating shaft assembly is arranged at the second mounting seat; The rotating shaft assembly comprises: a plug-in shaft, a limit plate, a deformable layer and a rotating shaft blade plate group; there is a gap between the plug-in shaft and the rotating shaft blade plate group, an air delivery pipe communicating with the gap is provided at the output end of the air pump, and the deformable layer is sleeved on the surface of the rotating shaft blade plate group; The rotating shaft blade group is composed of a plurality of rotating blades, one end of each rotating blade is provided with a latch, and the interior of each rotating blade has a slide groove matched with the latch.

2. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: There are at least three rotating blades, and the rotating blades are made of stainless steel, aluminum alloy or carbon fiber composite material.

3. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The thickness of the deformable layer is 0.2-0.4 cm, and the deformable layer is made of silica gel or high molecular elastomer.

4. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The cross section of the end of the latch is T-shaped, and one end of the slide slot has a groove matched with the end of the latch.

5. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: An operating table is arranged on the top of the first mounting seat, a transmission shaft is arranged on one side of the first mounting seat, the transmission shaft is connected to the mounting shaft via a shaft sleeve, and a support seat is arranged between the transmission shaft and the mounting shaft.

6. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The base is provided with a slide rail, and the first mounting seat, the second mounting seat and the supporting seat are all slidably connected to the slide rail.

7. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The adjustable range of the inner diameter of the deformable layer is 1 to 6 mm.

8. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The spinning mechanism comprises: a fixed seat, a telescopic column and a nozzle, a fixed plate parallel to the rotating shaft assembly is arranged on the top of the telescopic column, and the nozzle is slidably connected to the fixed plate.

9. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: Both ends of the plug-in shaft are provided with the limiting plates, and the ends of the rotating blades are in contact with the limiting plates.

10. A 3D printing device for preparing a cardiovascular stent according to claim 1, characterized in that: The maximum inner diameter formed by the rotating blade is smaller than the inner diameter of the limiting plate.

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