Manufacturing equipment for multi-segment hardness interventional catheter

Abstract

The utility model provides manufacturing equipment for a multi-segment hardness interventional catheter, which relates to the field of medical instruments and comprises a solution tank, a frame and a lifting rotating component. A plurality of dissolving tanks which are sequentially arranged in the length direction of the solution tank are arranged in the solution tank, and side wall grooves which are sunken downwards are formed in the side walls of every two adjacent dissolving tanks; the lifting and rotating assembly comprises a lifting table mounted on the rack, a rotating shaft mounted on the lifting table and a rotating shaft rotating driving part connected with the rotating shaft; the rotating shaft extends in the horizontal direction; the lifting table can ascend and descend along the rack so as to drive the rotating shaft to downwards enter or upwards move out of a side wall groove of the dissolving tank; the rotating shaft rotation driving part can drive the rotating shaft to rotate along the axis of the rotating shaft so as to drive the semi-finished pipe fixedly arranged outside the rotating shaft in a sleeving mode to rotate. According to the utility model, the production efficiency and the product quality of the interventional catheter are obviously improved, and a more flexible and reliable interventional catheter manufacturing means is provided for the medical field.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a fabrication device for a multi-segment rigid interventional catheter. Background Technology

[0002] With the development of interventional surgical techniques and instruments, interventional therapy is being used more and more widely. Interventional catheters, as the most basic consumable in interventional surgery, are widely used in the field of vascular intervention. An ideal interventional catheter needs to possess both good flexibility and sufficient support to smoothly enter complex vascular pathways and ensure effective transmission of pushing force. The stiffness of the catheter directly affects its flexibility and pushing ability. A catheter that is too soft, while having good flexibility, has poor pushing ability; conversely, a catheter that is too stiff, while having good pushing ability, may lead to insufficient flexibility and increase the risk of vascular injury.

[0003] Interventional catheters generally consist of a three-layer structure: an inner polymer tubing, a middle layer often made of braided or spiral metal wire, and an outer polymer material. To meet clinical needs, interventional catheters are typically designed with a multi-segment, gradually softening structure from proximal to distal. Current manufacturing processes usually involve creating a semi-finished tubing by attaching braided or spiral metal wires to the outer tubing; fusing extruded outer tubing of different hardnesses to create the outer tubing (i.e., the outer layer of the interventional catheter); and finally, assembling the outer tubing over the semi-finished tubing to form the interventional catheter. For the fusing of extruded outer tubing of different hardnesses—that is, using a high-hardness polymer extruded outer tubing at the proximal end and a low-hardness polymer extruded outer tubing at the distal end—this process first uses extrusion technology to create extruded outer tubing of different hardness properties and sizes. Then, using auxiliary consumables such as heat-shrink tubing, these segments of different hardness are fused to form an outer tubing layer with gradually changing hardness, which is then further combined with the semi-finished tubing to form the interventional catheter.

[0004] While this method can meet the requirement of gradual hardness variation in interventional catheters to some extent, several problems remain in practical operation. For example, slight dimensional differences in polymer outer tubes with different hardness can lead to large weld steps in the fusion bonding area, placing very high demands on the inner and outer diameters and concentricity of the polymer outer tubes, increasing the difficulty of achieving dimensional compliance. Furthermore, variations in various parameters during the extrusion process (such as temperature, speed, and pressure) significantly affect the final product's appearance quality, potentially causing issues such as black spots, pits, bumps, or abnormal colors on the product surface. Moreover, the fusion welding process requires the use of heat-shrink tubing, which is equivalent to a secondary high-temperature plasticization of the polymer material. Frequent or prolonged high-temperature treatments can lead to material hardening, cracking, and decreased durability. Therefore, developing a new method or equipment to improve existing processes and enhance the manufacturing efficiency and product quality of interventional catheters is particularly important. Utility Model Content

[0005] The purpose of this invention is to provide a device for manufacturing multi-segment rigid interventional catheters to alleviate the aforementioned technical problems in the prior art.

[0006] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0007] This utility model provides a device for manufacturing a multi-segment hardness interventional catheter, which is used to further process a semi-finished tube made by braiding or spiraling metal wires on the outside of the inner tube to manufacture a multi-segment hardness interventional catheter. The device includes a solution tank, a frame and a lifting and rotating assembly.

[0008] The solution tank has multiple dissolving tanks arranged sequentially along its length. Each dissolving tank is used to hold a solution containing dissolved polymer resin. The top surface of each dissolving tank is open, and the sidewalls of every two adjacent dissolving tanks have downwardly recessed sidewall grooves.

[0009] The lifting and rotating assembly includes a lifting platform mounted on the frame, a rotating shaft mounted on the lifting platform, and a rotating shaft drive unit connected to the rotating shaft; the rotating shaft extends horizontally; the lifting platform can be lifted and lowered along the frame to move the rotating shaft downwards into or upwards out of the side wall groove of the melting tank; the rotating shaft drive unit can drive the rotating shaft to rotate along its own axis to rotate the semi-finished tube that is fitted and fixed to the outside of the rotating shaft.

[0010] In an optional embodiment, the frame includes at least a first upright and a second upright disposed at both ends of the solution tank along the length of the solution tank, and the lifting and rotating assembly includes a first assembly and a second assembly, wherein the lifting platform of the first assembly is axially slidably mounted on the first upright, and the lifting platform of the second assembly is axially slidably mounted on the second upright.

[0011] In an optional embodiment, the first frame and the second frame each include at least two columns;

[0012] Each of the lifting platforms is provided with an axial through hole that is the same number of columns as the corresponding upright and extends vertically through the lifting platform, a lateral threaded hole that is the same number of axial through holes and connects one side surface of the lifting platform and the corresponding axial through hole, and a locking member that is the same number of lateral threaded holes.

[0013] Each column of the first and second uprights passes through the corresponding axial through holes of the lifting platform.

[0014] The locking element includes a rotating wheel and a locking rod connected to the middle of the rotating wheel and extending toward one side of the rotating wheel. The locking rods of each locking element are inserted into and threadedly connected to the interior of each of the lateral threaded holes.

[0015] In the locked state, the locking rod presses against the corresponding column to lock the lifting platform to the corresponding frame.

[0016] In an optional embodiment, the column is a threaded rod on its outer surface. In the locked state, the locking rod presses against a threaded groove corresponding to the threaded rod to lock the lifting platform to the corresponding support frame.

[0017] In an optional embodiment, the first frame and the second frame each include four columns, which are arranged in a long-sided shape in the horizontal plane.

[0018] In an optional embodiment, the rotating shaft drive unit is a drive motor, the housing of the drive motor is fixedly installed on the lifting platform, and the rotating shaft is connected to the output end of the drive motor.

[0019] In an optional embodiment, a fixed base is fixedly connected to the lifting platform, the rotating shaft is rotatably mounted on the fixed base, and the rotating shaft rotation drive is a manual crank fixedly connected to one end of the rotating shaft.

[0020] In an optional embodiment, the manufacturing apparatus further includes a heating and curing device;

[0021] The heating and curing device is fixed to the top of the frame and located directly above the solution tank;

[0022] The lifting platform can be raised and lowered along the frame to move the rotating shaft upwards toward or downwards away from the heating and curing device.

[0023] In an optional embodiment, the heating curing device includes a heating hood, a fan, and a heater; the heating hood has a heating chamber inside, the heating chamber has an air inlet, the air outlet of the fan is connected to the air inlet of the heating chamber, and the heater is disposed in the air duct connecting the fan and the air inlet of the heating chamber and is electrically connected to the fan; the lower surface of the heating hood is an arc surface that is open at both ends along the length of the solution tank and arches upward, the arc surface encloses a semi-cylindrical recessed space, and a plurality of air outlets communicating with the heating chamber are provided on the arc surface;

[0024] The lifting platform can move up and down along the frame to move the rotating shaft upwards into or downwards away from the recessed space enclosed by the lower surface of the heating shroud.

[0025] In an optional embodiment, the air outlets are evenly arranged on the lower surface of the heating cover.

[0026] The fabrication equipment for multi-segment rigid interventional catheters provided in this embodiment of the invention has at least the following significant beneficial effects:

[0027] (1) Different mechanical properties can be imparted to different areas of the catheter by using polymer resins with different hardness, so that the catheter can provide different support and flexibility in different parts as needed in clinical applications, thereby optimizing the overall performance of the interventional catheter:

[0028] (2) Improve the manufacturing precision and controllability of interventional catheters: By controlling the solution soaking time and rotation speed, the manufacturing equipment can ensure that each semi-finished tube is uniformly coated with a polymer resin solution of different hardness. This controllability helps to manufacture interventional catheters with precise multi-segment hardness distribution.

[0029] (3) High adaptability: The hardness distribution of the final product can be flexibly adjusted by changing parameters such as solution formulation, soaking time and number of rotations to meet different surgical needs.

[0030] (4) It can simplify the production process: the whole process only requires simple steps to complete the production of multi-segment hardness, without the need for complicated procedures and tools, which improves the efficiency and convenience of production.

[0031] In summary, the multi-segment rigidity interventional catheter manufacturing equipment provided by this embodiment significantly improves the production efficiency and product quality of interventional catheters, offering a more flexible and reliable means of manufacturing interventional catheters for the medical field. For other beneficial effects achievable by this embodiment, please refer to the detailed description in the specific embodiments section of this specification. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A front view of the overall structure of the fabrication equipment for the multi-segment rigid interventional catheter provided in this embodiment of the utility model, in its usage state;

[0034] Figure 2 Axonometric view of the overall structure of the fabrication equipment for the multi-segment rigid interventional catheter provided in this embodiment of the invention, in its use state. Figure 1 ;

[0035] Figure 3 for Figure 2 Enlarged view of the local structure of region A in the middle;

[0036] Figure 4 Axonometric view of the overall structure of the fabrication equipment for the multi-segment rigid interventional catheter provided in this embodiment of the invention, in its use state. Figure 2 ;

[0037] Figure 5 A schematic diagram of the isometric structure of the solution tank in the fabrication equipment for the multi-segment hardness interventional catheter provided in this embodiment of the utility model;

[0038] Figure 6 A schematic diagram of the isometric structure of the heating cover in the heating curing device of the multi-segment hardness interventional catheter fabrication equipment provided in this embodiment of the utility model.

[0039] Icons: 1-Semi-finished pipe; 2-Frame; 21-First upright; 22-Second upright; 23-Outer frame; 3-Solution tank; 31-Dissolving tank; 311-Side wall groove; 4-Lifting and rotating assembly; 41-Lifting platform; 411-Locking component; 42-Rotating shaft; 421-Rotating shaft rotation drive unit; 5-Heating cover; 51-Curved surface; 511-Air outlet. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0043] In the description of this utility model, it should be noted that:

[0044] Unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The terms "proximal," "distal," "axial," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In this embodiment, the end of the medical instrument closer to the surgeon during surgery is the proximal end of the medical instrument, and the end of the medical instrument entering the patient's blood vessel is the distal end of the medical instrument (the front end of the medical instrument is the distal end, and the rear end of the medical instrument is the proximal end). Furthermore, the terms "horizontal," "upper," and "lower" do not mean that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] The terms “first”, “second”, etc. are used only for distinguishing descriptions and do not indicate totality or relative position in time and / or space, nor should they be construed as indicating or implying relative importance.

[0047] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings.

[0048] This embodiment provides a fabrication device for a multi-segment rigidity interventional catheter, referring to... Figures 1 to 5 The equipment for manufacturing multi-segment rigidity interventional catheters is used to further process the semi-finished tube 1, which is made by braiding or spiraling metal wires on the outside of the inner tube, to manufacture multi-segment rigidity interventional catheters. Specifically, it includes a solution tank 3, a frame 2, and a lifting and rotating assembly 4. The interior of the solution tank 3 is provided with multiple dissolving tanks 31 arranged sequentially along the length of the solution tank 3. Each dissolving tank 31 is used to hold a solution containing dissolved polymer resin. The top surface of each dissolving tank 31 is open, and the sidewall of every two adjacent dissolving tanks 31 is provided with a downwardly recessed sidewall groove 311. The lifting and rotating assembly 4 includes a lifting platform 41 mounted on the frame 2, a rotating shaft 42 mounted on the lifting platform 41, and a rotating shaft rotation drive 421 connected to the rotating shaft 42; the rotating shaft 42 extends horizontally; the lifting platform 41 can be lifted and lowered along the frame 2 to bring the rotating shaft 42 downward into or upward out of the side wall groove 311 of the melting tank 31; the rotating shaft rotation drive 421 can drive the rotating shaft 42 to rotate along its own axis to bring the semi-finished tube 1, which is fitted and fixed outside the rotating shaft 42, to rotate.

[0049] The detailed steps for fabricating a multi-segment rigid interventional catheter using the fabrication equipment provided in this embodiment are as follows:

[0050] First, polymer resins of different hardness are dissolved in suitable organic solvents to prepare solutions containing polymer resins of different hardnesses. These resins include, but are not limited to, PA, PEBAX, TPU, PE, PP, PI, PVC, PET, and PEEK. Suitable organic solvents are selected based on the type of resin and may include, but are not limited to, one or more of the following: DMF, methyl ethyl ketone (MEK), acetone, methyl MEK, methyl isobutyl ketone (MEK), cyclohexane, cyclohexanone, benzene, toluene, xylene, formic acid, phenol, cresol, chlorobenzene, dichlorobenzene, dichloromethane, methanol, ethanol, isopropanol, methyl acetate, ethyl acetate, and propyl acetate. The prepared solutions containing polymer resins of different hardnesses are then poured sequentially into the respective dissolving tanks 31 along the length of the solution tank 3, in order of increasing or decreasing hardness of the dissolved polymer resins (or other desired order).

[0051] Then, the semi-finished tube 1, made of braided or spiral metal wires on the outside of the inner tube, is fixed to the outside of the rotating shaft 42;

[0052] The operating lifting platform 41 descends along the frame 2 to bring the rotating shaft 42 downward into the side wall groove 311 of the dissolving tank 31. When the rotating shaft 42 enters the side wall groove 311 of the dissolving tank 31, the lower half of the semi-finished tube 1 fixed on the rotating shaft 42 is immersed in the solution. The rotating shaft 42 is driven by the rotating shaft drive unit 421 to rotate along its own axis, so as to rotate the semi-finished tube 1 which is fixed outside the rotating shaft 42. Thus, the entire tube of the semi-finished tube 1 is flipped until the entire outer wall of the semi-finished tube 1 can contact the solution. The contact time can be selected within the range of 1s to 600s or longer, completing the process of coating the solution of polymer resin with different hardness in sections onto the outside of the semi-finished tube 1.

[0053] Then, the lifting platform 41 is raised along the frame 2 to move the rotating shaft 42 downward out of the side wall groove 311 of the dissolving tank 31, and wait for the solution to solidify. The solidification process can be carried out with the help of a heating and solidification device to quickly solidify the polymer resin on the outer surface of the tube.

[0054] Depending on the actual design size requirements of the product, repeat the above steps once or multiple times (e.g., but not limited to 2 to 100 times) to obtain an interventional catheter with multi-segment rigidity.

[0055] The fabrication equipment for the multi-segment rigid interventional catheter provided in this embodiment has at least the following significant beneficial effects:

[0056] (1) Different mechanical properties can be imparted to different areas of the catheter by using polymer resins with different hardness, so that the catheter can provide different support and flexibility in different parts as needed in clinical applications, thereby optimizing the overall performance of the interventional catheter:

[0057] (2) Improve the manufacturing precision and controllability of interventional catheters: By controlling the solution soaking time and rotation speed, the manufacturing equipment can ensure that each semi-finished tube 1 is uniformly coated with a polymer resin solution of different hardness. This controllability helps to manufacture interventional catheters with precise multi-segment hardness distribution.

[0058] (3) High adaptability: The hardness distribution of the final product can be flexibly adjusted by changing parameters such as solution formulation, soaking time and number of rotations to meet different surgical needs.

[0059] (4) It can simplify the production process: the whole process only requires simple steps to complete the production of multi-segment hardness, without the need for complicated procedures and tools, which improves the efficiency and convenience of production.

[0060] In summary, the multi-segment rigidity interventional catheter manufacturing equipment provided in this embodiment significantly improves the production efficiency and product quality of interventional catheters, offering a more flexible and reliable means of manufacturing interventional catheters for the medical field. For other beneficial effects achievable through this embodiment, please refer to the detailed description in the specific implementation section of this specification.

[0061] For the lifting and rotating assembly in this embodiment, it can be set on one side of the solution tank 3 along its length, or one set can be set on each side of the solution tank 3 along its length. In order to improve the stability of the operation, in this embodiment, it is optional and more preferably that the frame 2 includes at least a first upright 21 and a second upright 22 respectively set on both ends of the solution tank 3 along its length. The lifting and rotating assembly 4 includes a first assembly and a second assembly. The lifting platform 41 of the first assembly is axially slidably installed on the first upright 21, and the lifting platform 41 of the second assembly is axially slidably installed on the second upright 22.

[0062] There are several options for the lifting drive method between the lifting platform 41 and the corresponding upright. For example, an outer frame 23 can be provided as part of the machine frame 2. The aforementioned upright is located on the top or bottom frame of the outer frame 23. A lifting mechanism such as a pneumatic cylinder piston rod assembly, a hydraulic cylinder piston rod assembly, or an electric push rod is installed between the lifting platform 41 and the top or bottom frame of the outer frame 23 to drive the lifting platform 41 to rise and fall (slide axially) along the corresponding upright. For another example, refer to... Figures 1 to 5 In some optional embodiments of this example, the first support 21 and the second support 22 each include at least two columns; each lifting platform 41 is provided with an axial through hole that is the same number as the columns of the corresponding support and passes through the lifting platform 41 vertically, a lateral threaded hole that is the same number as the axial through hole and connects one side surface of the lifting platform 41 and the corresponding axial through hole, and a locking member 411 that is the same number as the lateral threaded hole. Each column of the first support 21 and the second support 22 passes through the corresponding axial through hole of the corresponding lifting platform 41. The locking member 411 includes a rotating wheel and a locking rod connected to the middle of the rotating wheel and extending toward one side of the rotating wheel. The locking rod of each locking member 411 is inserted into and threaded into the interior of the corresponding lateral threaded hole; in the locked state, the locking rod presses against the corresponding column to lock the lifting platform 41 to the corresponding support. To improve stability during locking, the column can optionally be a threaded rod with threads on its outer surface. In the locked state, the locking rod presses against a threaded groove of the corresponding screw to lock the lifting platform 41 to the corresponding support frame.

[0063] To further improve the lifting stability of the lifting platform 41, optionally, the first upright 21 and the second upright 22 each include four columns, which are arranged in a long side shape in the horizontal plane.

[0064] In some alternative embodiments, the rotating shaft drive unit 421 is a drive motor, the housing of which is fixedly mounted on the lifting platform 41, and the rotating shaft 42 is connected to the output end of the drive motor, driving the rotating shaft 42 to rotate. In other alternative embodiments, a fixed base is fixedly connected to the lifting platform 41, and the rotating shaft 42 is rotatably mounted on the fixed base. The rotating shaft drive unit 421 is a manual crank fixedly connected to one end of the rotating shaft 42 for manually rotating the rotating shaft 42. However, the manual rotation method is cumbersome, so the motor-driven rotation method is preferred.

[0065] Continue to refer to Figures 1 to 5 The manufacturing equipment also includes a heating and curing device; the heating and curing device is fixed on the top of the frame 2 and located directly above the solution tank 3; the lifting platform 41 can be raised and lowered along the frame 2 to move the rotating shaft 42 upward toward or downward away from the heating and curing device. The heating temperature of the heating and curing device can be selected in the range of 50℃ to 400℃. While heating, the rotating shaft 42 can be driven to rotate by the rotating shaft drive unit 421 to achieve rotational heating. The rotational heating time can be selected in the range of 1s to 600s to complete rapid curing.

[0066] Optionally, refer to Figure 6 , combined Figures 1 to 5 The heating method of the aforementioned heating and curing device is hot air heating, specifically including a heating hood 5, a fan, and a heater. The heating hood 5 has a heating chamber with an air inlet. The air outlet of the fan is connected to the air inlet of the heating chamber. The heater is located in the air duct connecting the fan and the air inlet of the heating chamber and is electrically connected to the fan. The lower surface of the heating hood 5 is an arc surface 51 that is open at both ends along the length of the solution tank 3 and arches upwards. This arc surface 51 forms a semi-cylindrical recessed space, and multiple air outlets 511 communicating with the heating chamber are provided on this arc surface 51. The lifting platform 41 can be raised and lowered along the frame 2 to carry the rotating shaft 42. The recessed space formed by the upper or lower surface of the heating cover 5 is used to guide the semi-finished tube 1 coated with the solution into the recessed space. The hot air drawn into the heating chamber of the heating cover 5 by the fan and heated by the heater can be discharged through the air outlets 511. The shape of the air outlets 511 can be selected, but is not limited to, circular, triangular, rectangular, rhomboid, trapezoidal, irregular, etc. The number of air outlets 511 can be selected, but is not limited to, 1 to 10,000. The air outlets 511 can be scattered or evenly arranged on the arc surface 51, preferably evenly arranged, so as to evenly heat and solidify the outer layer material of the tube.

[0067] Finally, it should be noted that the above embodiments and optional implementations in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing optional implementations, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. In addition, it is emphasized again that, in the absence of conflict, the features of the embodiments and optional implementations in the embodiments in this specification can be combined with each other.

Claims

1. A fabrication device for a multi-segment rigid interventional catheter, characterized in that: The application relates to a device for manufacturing a multi-segment intermediate catheter by further processing a semi-finished pipe (1) made of braided or spiral metal wires outside an inner pipe, and the device comprises a solution tank (3), a rack (2) and a lifting and rotating assembly (4). The solution tank (3) is internally provided with a plurality of solution dissolving grooves (31) arranged in sequence along the length direction of the solution tank (3), each of the solution dissolving grooves (31) is used for containing a solution in which a high molecular resin is dissolved; the top surface of each of the solution dissolving grooves (31) is open, and the side wall of each of two adjacent solution dissolving grooves (31) is provided with a downwardly recessed side wall groove (311). The lifting and rotating assembly (4) comprises a lifting table (41) installed on the rack (2), a rotating shaft (42) installed on the lifting table (41) and a rotating shaft rotating driving part (421) connected with the rotating shaft (42); the rotating shaft (42) extends along the horizontal direction; the lifting table (41) can be lifted along the rack (2) to enter or move out of the side wall groove (311) of the solution dissolving groove (31) with the rotating shaft (42); and the rotating shaft rotating driving part (421) can drive the rotating shaft (42) to rotate along the axis line thereof to rotate the semi-finished pipe (1) sleeved and fixed on the outside of the rotating shaft (42).

2. The apparatus for making a multi-segment stiffness interventional catheter of claim 1, wherein: The rack (2) at least comprises a first stand (21) and a second stand (22) arranged at the two ends of the solution tank (3) along the length direction of the solution tank (3), the lifting and rotating assembly (4) comprises a first assembly and a second assembly, the lifting table (41) of the first assembly is axially slidably installed on the first stand (21), and the lifting table (41) of the second assembly is axially slidably installed on the second stand (22).

3. The apparatus for making a multi-segment stiffness interventional catheter of claim 2, wherein: The first stand (21) and the second stand (22) each comprise at least two columns; Each of the lifting tables (41) is respectively provided with an axial through hole penetrating through the lifting table (41) in the up-down direction and having the same number as the columns of the corresponding stand, a lateral screw hole communicating the side surface of the lifting table (41) and the corresponding axial through hole and having the same number as the axial through holes, and a locking piece (411) having the same number as the lateral screw holes; Each of the columns of the first stand (21) and the second stand (22) respectively passes through the corresponding axial through hole of the corresponding lifting table (41); The locking piece (411) comprises a rotating wheel and a locking rod connected to the middle part of the rotating wheel and extending towards one side of the rotating wheel, and the locking rod of each of the locking pieces (411) is inserted into and threadedly connected to the inside of each of the lateral screw holes; In the locked state, the locking rod abuts against the corresponding column to lock the lifting table (41) on the corresponding stand.

4. The apparatus for making a multi-segment stiffness interventional catheter of claim 3, wherein: The column is a screw rod with a threaded outer surface, and in the locked state, the locking rod abuts against the inside of the threaded groove of the corresponding screw rod to lock the lifting table (41) on the corresponding stand.

5. The apparatus for making a multi-segment stiffness interventional catheter of claim 3, wherein: The first stand (21) and the second stand (22) each include four columns arranged in a long rectangle in a horizontal plane.

6. The apparatus for making a multi-segment stiffness interventional catheter of claim 1, wherein: The rotating shaft rotating drive part (421) is a drive motor, the shell of the drive motor is fixedly installed on the lifting platform (41), and the rotating shaft (42) is connected to the output end of the drive motor.

7. The apparatus for making a multi-segment stiffness interventional catheter of claim 1, wherein: The lifting platform (41) is fixedly connected with a fixed seat, the rotating shaft (42) is rotatably installed on the fixed seat, and the rotating shaft rotating drive part (421) is a manual crank fixedly connected to one end of the rotating shaft (42).

8. The apparatus for making a multi-segment stiffness interventional catheter of claim 1, wherein: The manufacturing equipment further comprises a heating and curing device; The heating and curing device is fixed on the top of the rack (2) and directly above the solution tank (3); The lifting platform (41) can be lifted along the rack (2) to approach or move away from the heating and curing device with the rotating shaft (42).

9. The apparatus for making a multi-segment stiffness interventional catheter of claim 8, wherein: The heating and curing device comprises a heating cover (5), a fan and a heater; the heating cover (5) is internally provided with a heating cavity, the heating cavity is provided with an air inlet, the air outlet of the fan is connected with the air inlet of the heating cavity, the heater is arranged in an air duct connecting the fan and the air inlet of the heating cavity and is electrically connected with the fan; the lower surface of the heating cover (5) is an arc surface (51) which is open at both ends along the length direction of the solution tank (3) and is upwardly arched, the arc surface (51) surrounds a semicylindrical recessed space, a plurality of air outlets (511) in communication with the heating cavity are arranged on the arc surface (51); The lifting platform (41) can be lifted along the rack (2) to enter or move away from the recessed space surrounded by the lower surface of the heating cover (5) with the rotating shaft (42).

10. The apparatus for making a multi-segment stiffness interventional catheter of claim 9, wherein: The air outlets (511) are uniformly arranged on the lower surface of the heating cover (5).

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