Manufacturing method of hypotube guide wire
By forming a wrapped first heat shrink tube on the outside of the hyperbar guide wire and injecting the adhesive between the hyperbar guide tube and the first composition, the problem of glue overflow is solved, the neatness of the guide wire and the firmness of the adhesive are achieved, and the overall performance of the guide wire is improved.
Patent Information
- Application Number
- CN202411736609.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-14
AI Technical Summary
In the existing method of making guide wires of hypotubes, glue is prone to overflow from the notch of hypotubes, affecting the quality of the guide wires.
By forming a wrapped first heat shrink tube outside the guide wire of the hypotube and injecting the adhesive between the hypotube and the first composition, the adhesive is filled inside the hypotube, so that the hypotube is bonded to the spring, and the adhesive cannot seep out of the notch structure of the hypotube.
This method ensures that the appearance of the guide wire is neat and the adhesive can be filled more and more uniformly, making the bond between the hypotube and the spring more firmly, and the performance of each part of the hypotube guide wire is more uniform, making it easy to use.
Smart Images
Figure CN119610698A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of guide wire processing, and in particular to a method for manufacturing a hypotube guide wire. Background Art
[0002] When producing a hypotube guidewire, a spring is connected to the outside of the core wire, and after glue is coated on the outside, the hypotube is sleeved outside the spring to connect the hypotube and the spring. However, this method easily causes the glue to overflow from the notch of the hypotube, thereby affecting the quality of the guidewire. Summary of the invention
[0003] The purpose of the present invention is to provide a method for manufacturing a hypotube guidewire to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0004] Technical solutions adopted to solve the above technical problems: On the one hand, the present invention provides a method for manufacturing a hypotube guidewire, the hypotube guidewire comprising a core wire, a spring and a hypotube, and the manufacturing method comprises the following steps: S100: fixing the core wire and the spring to form a first composition; sleeve the hypotube on the outside of the first composition to form a second composition; sleeve the first heat shrink tube on the outside of the second composition to form a third composition; S200: performing a first heat treatment on the third composition to shrink the first heat shrink tube and wrap it around the outside of the hypotube; S300: injecting an adhesive between the hypotube and the first composition to connect them; after the hypotube and the first composition are connected, tearing off the first heat shrink tube.
[0005] This technical solution has at least the following beneficial effects: when manufacturing a hypotube guidewire, a first heat shrink tube is formed to wrap around the outside of the hypotube guidewire, and then an adhesive is injected between the hypotube and the first composition, so that the adhesive is filled inside the hypotube, so that the hypotube and the spring are adhered, and the adhesive cannot seep out of the groove structure of the hypotube to the outside, thereby ensuring the neat appearance of the guidewire, and the adhesive can be filled more and more evenly, so that the bonding between the hypotube and the spring is more firmly, and the performance of each part of the hypotube guidewire is more uniform, which is easy to use.
[0006] As a further improvement of the above technical solution, in S200, a portion of the third composition is subjected to a first heat treatment so that one end of the first heat shrink tube protrudes from the hypotube to form a bell-mouth structure.
[0007] As a further improvement of the above technical solution, the adhesive is ultraviolet light-curing glue, and S300 includes: injecting the ultraviolet light-curing glue from the bell-mouth structure into the internal gap between the hypotube and the first composition, and curing it with an ultraviolet lamp.
[0008] As a further improvement of the above technical solution, step S300 includes: after applying a preset pressure when the adhesive is injected, performing a second heat treatment on the third composition, so that the first heat shrink tube shrinks, the excess adhesive is discharged, and after the sea wave tube is connected to the first composition, the first heat shrink tube is torn off.
[0009] As a further improvement of the above technical solution, the method of fixedly connecting the core wire and the spring to form a first composite comprises: sleeved the spring on the outside of the core wire and fixed with ultraviolet light-curing glue.
[0010] As a further improvement of the above technical solution, the first heat shrinkable tube is a FEP heat shrinkable tube.
[0011] As a further improvement of the above technical solution, the heat shrinkage ratio of the first heat shrinkable tube is 2:1.
[0012] As a further improvement of the above technical solution, in step S200, a temperature-controlled drying gun is used to perform a first heat treatment on the third composition, and the temperature of the first heat treatment is 200 degrees Celsius to 250 degrees Celsius.
[0013] As a further improvement of the above technical solution, the manufacturing method includes: S400: fixing the core wire and the spring to form a first composition; putting a thermoplastic polyurethane tube on the outside of the first composition to form a fourth composition; putting the sea wave tube on the outside of the fourth composition to form a fifth composition; putting a first heat shrink tube on the outside of the fifth composition to form a sixth composition; S500: performing a first heat treatment on the sixth composition to shrink the first heat shrink tube and wrap the outside of the sea wave tube, and the thermoplastic polyurethane tube melts to complete the connection between the sea wave tube and the first composition; S600: cooling the sixth composition and tearing open the first heat shrink tube.
[0014] Another aspect of the present invention provides a hypotube guidewire, which is manufactured by any of the hypotube guidewire manufacturing methods described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0016] Figure 1 Schematic diagram of the process of manufacturing a hypotube guidewire in an embodiment of the present invention;
[0017] Figure 2 It is a schematic diagram of the structure of the core wire and the spring in an embodiment of the present invention;
[0018] Figure 3Schematic diagram of the structure of the hypotube guidewire in an embodiment of the present invention.
[0019] 71. Core wire; 72. Spring; 73. Hypotube. DETAILED DESCRIPTION
[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0022] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0024] Embodiment 1:
[0025] Reference Figure 1-3 The hypotube guidewire includes a core wire 71, a spring 72 and a hypotube 73, wherein the spring 72 is a platinum tungsten spring. The platinum tungsten spring is sleeved on the outside of the core wire 71, and the hypotube 73 is sleeved on the outside of the platinum tungsten spring. The hypotube 73, the platinum tungsten spring and the core wire 71 are sleeved and connected in sequence to form a hypotube guidewire.
[0026] The method for manufacturing a hypotube guidewire comprises the following steps:
[0027] Step S100: the core wire 71 is fixedly connected to the spring to form a first composite; a hypotube 73 is sheathed outside the first composite to form a second composite; a first heat shrink tube is sheathed outside the second composite to form a third composite.
[0028] Specifically, a platinum tungsten spring is sleeved on the outside of the core wire 71, and the platinum tungsten spring and the core wire 71 are adhered by ultraviolet (UV) light-curing glue, and cured by ultraviolet light irradiation to achieve a relatively fixed connection between the platinum tungsten spring and the core wire 71 to form a first combination, and a sea wave tube 73 is sleeved on the outside of the first combination (the core wire 71 and the platinum tungsten spring that are fixedly connected), that is, the sea wave tube 73 is sleeved on the outside of the platinum tungsten spring, thereby forming a second combination (the core wire 71 and the platinum tungsten spring that are fixedly connected, and the sea wave tube 73).
[0029] A first heat shrink tube is sleeved on the outer side of the second composition to form a third composition (a core wire 71 and a platinum tungsten spring fixedly connected, a sea wave tube 73, and a first heat shrink tube). The first heat shrink tube is an FEP heat shrink tube. Among them, FEP heat shrink tube, the full name of which is fluorinated ethylene propylene copolymer heat shrink tube, is a high-performance heat shrink tube material. It combines the excellent properties of fluoropolymers, including high temperature resistance, chemical corrosion resistance, electrical insulation, and non-stickiness. In this embodiment, an FEP heat shrink tube with a shrinkage ratio of 2:1 is used. In other embodiments, a common FEP heat shrink tube with a shrinkage ratio of 1.3:1 or 1.6:1 may also be used.
[0030] It should be noted that, in the actual operation steps, the first heat shrink tube can be first sleeved on the outside of the hypotube 73 and then the hypotube 73 can be sleeved on the outside of the second composition, so as to directly form the third composition. In other embodiments, the two ends of the platinum tungsten spring can be welded to the corresponding two ends of the core wire 71 by welding, so as to achieve relative fixation of the platinum tungsten spring and the core wire 71.
[0031] In addition, the length of the first heat shrink tube is longer than that of the sea wave tube 73, and when the first heat shrink tube is inserted into the sea wave tube 73, a length is reserved near the end of the core wire 71 so that the first heat shrink tube protrudes from the end of the sea wave tube 73 at this end.
[0032] Step S200 : performing a first heat treatment on the third composition, so that the first heat shrink tube shrinks and wraps around the outer side of the hypotube 73 .
[0033] Specifically, the first heat treatment can be achieved by a temperature-controlled drying gun device, that is, the third composition (the fixedly connected core wire 71 and the platinum tungsten spring, the hypotube 73, and the first heat shrink tube) is subjected to the first heat treatment by the device, and the temperature of the first heat treatment is controlled at 200 degrees Celsius-250 degrees Celsius, and the temperature of the first heat treatment is preferably 220 degrees Celsius and 230 degrees Celsius. In other embodiments, the temperature of the first heat treatment can also be controlled at 100 degrees Celsius-200 degrees Celsius. During the heat treatment process, only the first heat shrink tube on the outside of the hypotube 73 is heat-treated, and the first heat shrink tube on the outside of the hypotube 73 is heat-shrunk and deformed after the heat treatment and is tightly wrapped on the outside of the hypotube 73, thereby forming a closed barrier on the outside of the hypotube 73. The first heat shrink tube portion protruding from the end of the hypotube 73 is not heat-treated in a transitional manner, so that the first heat shrink tube portion protruding from the end of the hypotube 73 forms a bell-mouth structure, and the diameter of the bell-mouth structure gradually increases in the direction away from the hypotube 73.
[0034] Step S300: injecting adhesive between the hypotube 73 and the first composition to connect them; after the hypotube 73 and the first composition are connected, tearing off the first heat shrink tube.
[0035] Specifically, the adhesive is injected from the trumpet structure formed at the end of the first heat shrink tube, so that the adhesive is filled on the outside of the first composition and the hypotube 73. At the same time, the adhesive will flow through the gap of the platinum tungsten spring to the outer surface of the core wire 71. Not only can the hypotube 73 and the platinum tungsten spring be firmly connected, but also the connection between the platinum tungsten spring and the core wire 71 can be strengthened, so that the overall structure of the hypotube guide wire is more stable and the performance is more uniform. Among them, the adhesive is ultraviolet light-curing glue. After the ultraviolet light-curing glue is injected between the hypotube 73 and the platinum tungsten spring from the trumpet structure, it is irradiated and cured by ultraviolet lamp to achieve the overall stable connection of the hypotube 73, the platinum tungsten spring and the core wire 71. Finally, the opening is pierced with a knife on the trumpet structure, and the first heat shrink tube is torn off to complete the production of the hypotube guide wire. Since the FEP heat shrink tube is usually transparent or translucent, while realizing the ultraviolet light curing process, the filling of the internal ultraviolet light-curing glue can also be observed, thereby improving the quality of the injection.
[0036] After tearing off the first heat shrink tube, a hemispherical ball head is formed at the end of the hypotube guide wire by dispensing glue.
[0037] In other embodiments, an opening for easy tearing may be pre-set at one end of the first heat shrink tube. The opening is located at the end of the trumpet structure away from the sea wave tube 73. After the sea wave tube 73, the platinum tungsten spring and the core wire 71 are firmly connected as a whole, the tube can be directly torn through the opening to improve the production efficiency.
[0038] In another embodiment, in step S300, when the adhesive is injected into the sea wave tube 73 through the trumpet structure, a preset pressure is applied to the injection of the adhesive, so that after the adhesive fills or almost fills the gap between the sea wave tube 73 and the platinum tungsten spring, under the action of the preset pressure, the adhesive is filled as much as possible in the slot space outside the sea wave tube 73 and the gap space outside the platinum tungsten spring, thereby ensuring the filling degree of the adhesive between the sea wave tube 73 and the platinum tungsten spring. The sea wave tube guide wire containing high quality adhesive has better properties such as toughness and bending resistance, and the uniformity of various properties is also good, thereby improving the passability of the sea wave tube guide wire and promoting smooth use.
[0039] After the injection of the adhesive is completed and before curing, the third composition (the fixedly connected core wire 71 and the platinum tungsten spring, the sea wave tube 73, and the first heat shrink tube) is subjected to a second heat treatment, and the temperature of the second heat treatment is lower than 180 degrees Celsius. Preferably, the temperature of the second heat treatment is 130 degrees Celsius. It is understandable that the lowest temperature of the heat treatment is conventionally determined at the lowest temperature at which the material can be deformed, which is related to the actual material properties and is not further limited here. When the adhesive is subjected to a preset pressure, the first heat shrink tube may be deformed and bulge outward at the corresponding notch position of the sea wave tube 73. During the second heat treatment, the first heat shrink tube further shrinks, so that the excess adhesive is discharged and the adhesive is not easy to protrude from the outer wall of the sea wave tube 73, thereby ensuring the neatness and smoothness of the outer side of the sea wave tube 73. Finally, it is cured by irradiation with an ultraviolet lamp, and then the first heat shrink tube is torn off to complete the production of the sea wave tube guide wire.
[0040] The embodiment of the present application also provides a hypotube guidewire, which is manufactured using the above hypotube guidewire manufacturing method.
[0041] Embodiment 2:
[0042] The difference between this embodiment and the first embodiment lies in the difference in the adhesive and the method of using the adhesive. Specifically, in this embodiment, the method for making a hypotube guidewire includes the following steps:
[0043] Step S400: the core wire 71 is fixedly connected to the spring to form a first composite; a thermoplastic polyurethane tube is placed on the outside of the first composite to form a fourth composite; a sea wave tube 73 is placed on the outside of the fourth composite to form a fifth composite; a first heat shrinkable tube is placed on the outside of the fifth composite to form a sixth composite;
[0044] Specifically, a platinum tungsten spring is sleeved on the outside of the core wire 71, and the platinum tungsten spring and the core wire 71 are adhered by ultraviolet (UV) light-curing glue, and cured by ultraviolet light irradiation, so that the platinum tungsten spring and the core wire 71 are relatively fixedly connected to form a first composite. The difference between step S400 and step S100 is that before the hypotube 73 is sleeved, the outside of the first composite is first sleeved with a thermoplastic polyurethane tube, and then the hypotube 73 is sleeved to form a fifth composite, and the first heat shrink tube is sleeved on the outer surface of the fifth composite to form a sixth composite (fixedly connected core wire 71 and platinum tungsten spring, thermoplastic polyurethane tube, hypotube 73, first heat shrink tube).
[0045] The first heat shrinkable tube is a FEP heat shrinkable tube. Among them, the FEP heat shrinkable tube, the full name of which is fluorinated ethylene propylene copolymer heat shrinkable tube, is a high-performance heat shrinkable tube material. It combines the excellent properties of fluoropolymers, including high temperature resistance, chemical corrosion resistance, electrical insulation and non-stickiness. In this embodiment, a FEP heat shrinkable tube with a shrinkage ratio of 2:1 is used. In other embodiments, a common FEP heat shrinkable tube with a shrinkage ratio of 1.3:1 or 1.6:1 can also be used.
[0046] In addition, the length of the first heat shrink tube is longer than that of the sea wave tube 73, and when the first heat shrink tube is inserted into the sea wave tube 73, a length is reserved near the end of the core wire 71 so that the first heat shrink tube protrudes from the end of the sea wave tube 73 at this end.
[0047] Step S500: performing a first heat treatment on the sixth composition, so that the first heat shrink tube shrinks and wraps the outer side of the hypotube 73, and the thermoplastic polyurethane tube melts to complete the connection between the hypotube 73 and the first composition;
[0048] Specifically, the temperature of the first heat treatment is controlled at 200 degrees Celsius-250 degrees Celsius, and the temperature of the first heat treatment is preferably 220 degrees Celsius and 230 degrees Celsius. In other embodiments, the temperature of the first heat treatment can also be controlled at 100 degrees Celsius-200 degrees Celsius. During the heat treatment process, only the first heat shrink tube on the outside of the sea wave tube 73 is heat treated. After the heat treatment, the first heat shrink tube on the outside of the sea wave tube 73 is deformed by heat shrinkage and tightly wrapped on the outside of the sea wave tube 73, thereby forming a closed barrier on the outside of the sea wave tube 73. The portion of the first heat shrink tube protruding from the end of the sea wave tube 73 is not heat treated transitionally, so that the portion of the first heat shrink tube protruding from the end of the sea wave tube 73 forms a bell-mouth structure, and the diameter of the bell-mouth structure gradually increases in the direction away from the sea wave tube 73.
[0049] The difference between step S500 and step S200 is that when the sixth composition is subjected to the first heat treatment, the thermoplastic polyurethane tube (TPU tube) between the platinum tungsten spring and the hypotube 73 realizes thermal rheology and adheres the platinum tungsten spring and the hypotube 73 to each other, thereby realizing the connection between the platinum tungsten spring and the hypotube 73. The thermoplastic polyurethane tube contains a developer.
[0050] Step S600: cooling the sixth composition and tearing open the first heat shrink tube.
[0051] Specifically, the difference between step S600 and step S300 is that the connection between the platinum tungsten spring and the hypotube 73 has been completed without injecting an adhesive, and after the sixth composition is cooled, the first heat sink tube is torn open to complete the production of the hypotube guidewire. It should be noted that the cooling of the sixth composition can be carried out by natural cooling or air cooling.
[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A method for manufacturing a hypotube guidewire, characterized in that: The hypotube guidewire comprises a core wire, a spring and a hypotube, and the manufacturing method comprises the following steps: S100: The core wire is fixedly connected to the spring to form a first composite; the hypotube is sheathed on the outer side of the first composite to form a second composite; the first heat shrink tube is sheathed on the outer side of the second composite to form a third composite; S200: performing a first heat treatment on the third composition to shrink the first heat shrink tube and wrap it around the outer side of the hypotube; S300: injecting an adhesive between the hypotube and the first composition to connect them; after the hypotube and the first composition are connected, tearing open the first heat shrink tube.
2. A method for manufacturing a hypotube guidewire according to claim 1, characterized in that: In S200, a portion of the third composition is subjected to a first heat treatment, so that the first heat shrink tube protrudes from one end of the hypotube to form a bell-mouth structure.
3. A method for manufacturing a hypotube guidewire according to claim 2, characterized in that: The adhesive is ultraviolet light-curing glue, and S300 includes: injecting the ultraviolet light-curing glue from the bell-mouth structure into the internal gap between the hypotube and the first composition, and curing it by irradiation with an ultraviolet lamp.
4. A method for manufacturing a hypotube guidewire according to claim 2, characterized in that: Step S300 includes: after applying a preset pressure when injecting the adhesive, performing a second heat treatment on the third composition, shrinking the first heat shrink tube, discharging the excess adhesive, and tearing off the first heat shrink tube after the sea wave tube is connected to the first composition.
5. A method for manufacturing a hypotube guidewire according to claim 1, characterized in that: The step of fixedly connecting the core wire and the spring to form a first composite comprises: The spring is sleeved on the outside of the core wire and fixed with ultraviolet light-curing glue.
6. A method for manufacturing a hypotube guidewire according to claim 1, characterized in that: The first heat shrinkable tube is a FEP heat shrinkable tube.
7. A method for manufacturing a hypotube guidewire according to claim 1, characterized in that: The heat shrinkage ratio of the first heat shrinkable tube is 2:
1.
8. A method for manufacturing a hypotube guidewire according to claim 1, characterized in that: In step S200, a temperature-controlled drying gun is used to perform a first heat treatment on the third composition, and the temperature of the first heat treatment is 200 degrees Celsius to 250 degrees Celsius.
9. A method for manufacturing a hypotube guidewire according to any one of claims 1 to 8, characterized in that: The production method comprises: S400: fixing and connecting the core wire and the spring to form a first composition; covering the first composition with a thermoplastic polyurethane tube to form a fourth composition; covering the fourth composition with a hypotube to form a fifth composition; covering the fifth composition with a first heat shrink tube to form a sixth composition; S500: performing a first heat treatment on the sixth composition, so that the first heat shrinkable tube shrinks and wraps the outer side of the hypotube, and the thermoplastic polyurethane tube melts to complete the connection between the hypotube and the first composition; S600: Cooling the sixth composition and tearing open the first heat shrink tube.
10. A hypotube guidewire, characterized in that: The hypotube guidewire is manufactured by the method for manufacturing a hypotube guidewire as described in any one of claims 1 to 9.