Guidewire forming equipment and process

Abstract

The present invention relates to the field of medical device technology, and specifically to a guide wire forming equipment and process. The equipment includes a frame with a slide rail provided on the frame along the length direction; at least a pair of clamping mechanisms installed at both ends of the frame along the length direction, for fixing and tightening the core wire; a coating mechanism, slidably installed on the slide rail, for coating the core wire tightened on the clamping mechanism; a curing mechanism, slidably installed on the slide rail, for curing the guide wire coated by the coating mechanism; and a control mechanism, for controlling the clamping mechanism, the coating mechanism and the curing mechanism to operate; the present invention adopts an extrusion molding method through a supply pump during movement to form a coating layer wrapped around the outer surface of the core wire. Compared with the existing heat shrinkage process, this coating molding method is simpler, easier to operate, and the material is firmly bonded, and the coating is uniform. The formed coating layer has a good sealing effect, is not easy to expose the core wire, and greatly improves the safety of surgical treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guidewire forming device and process. Background Art

[0002] Guidewire technology refers to a minimally invasive interventional technique that uses flexible metal instruments, guided by imaging equipment, to enter human cavities or blood vessels to assist in channel establishment, lesion dredging, media delivery, tissue or media removal, and other instrument delivery. Common guidewires, such as the Zebra Guidewire, are medical assistive devices commonly used in surgical procedures involving non-vascular cavities. During surgery, the Zebra Guidewire is operated under endoscopic or X-ray monitoring to guide instruments into non-vascular cavities for targeted procedures. Structurally, the zebra guidewire consists of an internal core wire and a coating layer wrapped around the core wire. The existing guidewire coating is generally made of PTFE (polytetrafluoroethylene), and its production process uses PTFE heat shrink tubing heat shrink molding. Since high-quality PTFE heat shrink tubing materials are still monopolized by foreign companies, they rely on imports, which brings high production costs to companies and is also prone to restrictions. In addition, the heat shrink process of PTFE heat shrink tubing and core wire is difficult, and the shrinkage force and temperature must be precisely controlled. Improper operation may affect the sealing effect or cause the material performance to deteriorate, resulting in poor sealing effect of the coating layers at both ends of the zebra guidewire on the core wire, and there is a risk of exposing the core wire, thereby increasing the unsafety of surgical treatment. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a guide wire forming device and process, and the technical solution is as follows:

[0004] The present invention provides a guide wire forming device, which is used for coating the outer surface of the core wire of the guide wire to form a coating layer that wraps the core wire, and has the following characteristics: it comprises a frame, on which a slide rail is provided along the length direction; at least one pair of clamping mechanisms, which are installed at both ends of the frame along the length direction, and are used to fix and tighten the core wire; a coating mechanism, which is slidably installed on the slide rail, and is used to coat the core wire tightened on the clamping mechanism; a curing mechanism, which is slidably installed on the slide rail, and is used to cure the guide wire coated by the coating mechanism; and a control mechanism, which is used to control the clamping mechanism, the coating mechanism and the curing mechanism to work; wherein the coating mechanism comprises: a coating frame, which is slidably installed on the slide rail; a coating liquid A supply component comprising a liquid storage vessel, a supply pump and a delivery pipe installed on the coating rack; a coating component comprising a first coating seat and a second coating seat corresponding to each other, wherein a coating space for the core wire to pass through is formed between the first coating seat and the second coating seat; and a moving component installed on the coating rack, driving the first coating seat and the second coating seat to move toward each other or driving the first coating seat to move toward the second coating seat or driving the second coating seat to move toward the first coating seat, so as to clamp the core wire between the first coating seat and the second coating seat; the liquid storage vessel stores coating liquid, and the supply pump delivers the coating liquid from the liquid storage vessel to the coating space through the delivery pipe.

[0005] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the first coating seat is located above the second coating seat, and the first coating seat includes a first coating mounting seat and a first coating block fixed on the first coating mounting seat, the second coating seat includes a second coating mounting seat and a second coating block fixed on the second coating mounting seat, the first coating block has a first coating action surface for contacting the core wire; the second coating block has a second coating action surface for contacting the core wire; the first coating action surface and the second coating action surface are arranged opposite to each other, and the coating space is formed between the two.

[0006] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the area of ​​the first coating action surface is smaller than the area of ​​the second coating action surface, so that the second coating block has a covered part vertically covered by the first coating block and an exposed part exposed to the first coating block.

[0007] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the liquid outlet end of the delivery tube is fixed on one side of the first coating mounting seat, and this side is the side where the second coating block has the exposed part, and the delivery tube can drop the coating liquid on the core wire in the exposed part while following the movement of the coating frame.

[0008] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the coating mechanism also includes a telescopic frame movably mounted on the coating frame, and the moving component contains: a fixed plate, mounted on the telescopic frame; a guide rail, vertically fixed on the fixed plate; a first sliding seat, slidably mounted on the guide rail, and equipped with the first coating mounting seat; a first drive group, mounted on the first sliding seat, for driving the first sliding seat to slide along the guide rail.

[0009] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the moving component also contains: a second sliding seat, which is slidably mounted on the guide rail and is equipped with the second coating mounting seat; and a second driving group, which is mounted on the second sliding seat and is used to drive the second sliding seat to slide along the guide rail.

[0010] The guide wire forming device proposed in the present invention may also have the following features: the curing mechanism comprises: a curing frame, slidably arranged on the slide rail; a heat preservation box, having a curing channel for the guide wire to enter; a movable component, used to drive the heat preservation box to move relative to the curing frame so that the heat preservation box is close to or away from the curing frame; a curing device, mounted on the heat preservation box, used to cure the guide wire. The movable component comprises: a slide cylinder, fixed to the curing frame; a slide telescopic rod, one end of which is connected to the slide cylinder and the other end is connected to the heat preservation box; the slide cylinder drives the slide telescopic rod to telescope in the lateral direction.

[0011] In the guide wire forming equipment proposed in the present invention, it can also have the following features: the clamping mechanism has: a clamping frame, movably arranged on the frame; a positioning plate, fixed at one end of the clamping frame, on which a through hole is provided for the end of the core wire to pass through; a clamping claw, installed on the clamping frame and located on one side of the positioning plate, for grabbing and fixing the end of the core wire passing through the through hole; a clamping drive group, installed at the other end of the clamping frame, for driving the clamping claw to rotate.

[0012] In the guide wire forming equipment proposed in the present invention, it can also have the following characteristics: the clamping drive group contains: a rotating motor, fixed on the clamping frame, a rotating rod, one end of which is installed on the output shaft of the rotating motor through a clamping coupling, and the other end is connected to the clamping claw.

[0013] The present invention also proposes a guidewire forming process having the following characteristics, which is applicable to the guidewire forming device as described above and comprises at least the following steps:

[0014] Step 1: Fixing the core wire: fixing the two ends of the core wire to be coated on a pair of clamping mechanisms at both ends of the frame respectively, and controlling the clamping mechanisms through a control mechanism to tighten the core wire;

[0015] Step 2: Core wire coating: first, start the supply pump to pre-fill the delivery pipe with coating liquid, and apply the coating liquid to the coating space between the first coating mounting seat and the second coating mounting seat through the delivery pipe; then, control the first coating mounting seat and the second coating mounting seat of the coating mechanism to move to the upper and lower sides of the core wire through the control mechanism, so that the core wire is in the coating space, and move the first coating mounting seat and the second coating mounting seat toward each other to clamp the core wire; then, control the coating mechanism to slide along the slide rail to coat the core wire through the control mechanism. During the coating process, the supply pump delivers the coating liquid from the liquid storage container through the delivery pipe to the coating space;

[0016] Step 3: Curing the guide wire: The curing mechanism is controlled by the control mechanism to move to the vicinity of the guide wire coated in step 2, to accommodate part of the guide wire therein, and then slide along the slide rail to cure the guide wire, thus completing one coating and curing step;

[0017] Step 4: Rotate the guide wire to coat and cure again: The control mechanism controls the clamping mechanism to drive the guide wire that has completed the coating and curing in the above step 3 to rotate 90°, and repeat steps 2-3 for coating and curing; after completion, the clamping mechanism is controlled again to drive the guide wire that has completed the coating and curing in the above step 3 to rotate 90°, and repeat steps 2-3 for coating and curing; and so on, until the thickness of the coating layer formed after coating and curing reaches a predetermined thickness.

[0018] The beneficial technical effects of the present invention compared with the prior art are as follows:

[0019] The present invention provides a guide wire forming device and process. This device has a clamping mechanism, a coating mechanism, and a curing mechanism. When in use, the core wire is first clamped and tightened by the clamping mechanism, and then the coating mechanism is manipulated to move near the core wire so that the core wire is clamped in the coating space on the coating mechanism. The coating mechanism moves along the slide rail and the core wire, and during the movement, the supply pump of the coating mechanism can deliver and extrude the coating material (coating liquid) through the delivery pipe to the coating space, so that the coating mechanism uniformly coats the core wire clamped thereon during the movement. Then the curing mechanism is manipulated to move near the coated guide wire, and the coating liquid coated on the outside of the core wire is gradually cured by movement to form a coating layer. The present invention adopts the method of forming a coating layer on the outer surface of the core wire by extrusion molding through the supply pump during the movement. Compared with the existing heat shrink process, this coating molding method is simpler, easier to operate, and the material is firmly bonded. The coating is uniform, and the formed coating layer has a good sealing effect and is not easy to expose the core wire, which greatly improves the safety of surgical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the description of the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a simplified structural diagram of the guide wire forming equipment in Example 1 of the present invention.

[0022] Figure 2 This is a simplified structural diagram of the clamping mechanism in Example 1 of the present invention.

[0023] Figure 3 This is a simplified structural diagram of the coating mechanism in Example 1 of the present invention.

[0024] Figure 4 This is a schematic diagram of the first coating seat installation structure in Example 1 of the present invention.

[0025] Figure 5 This is a schematic diagram of the second coating seat installation structure in Example 1 of the present invention.

[0026] Figure 6 This is a schematic diagram of the first coating seat, the second coating seat and the guide rail installation structure in Example 1 of the present invention.

[0027] Figure 7 This is a simplified structural diagram of the curing mechanism in Example 1 of the present invention as viewed from the curing frame.

[0028] Figure 8This is a simplified structural diagram of the curing mechanism in Example 1 of the present invention from the perspective of the curing channel.

[0029] Description of reference numerals:

[0030] Guidewire forming device 100; core wire 1; frame 10; left slide rail 111; right slide rail 112; curing drive motor 12; coating drive motor 13; clamping mechanism 20; clamping frame 21; positioning plate 22; through hole 221; clamping claw 23; finger cylinder 231; clamping arm 232; clamping drive group 24; rotating motor 241; rotating rod 242; clamping coupling 243; cylinder assembly 25; coating mechanism 30; coating frame 31; liquid storage container 32; fixing bracket 321; supply pump 33; output delivery pipe 34; first coating seat 35; first coating mounting seat 351; first coating block 352; first coating active surface 3521; first coating mounting block 353; second coating seat 36; second coating mounting seat 361; second coating block 362; second coating active surface 3621; second coating mounting block 36 3; coating space 37; fixing plate 381; guide rail 382; guide rail A3821; guide rail B3822; first sliding seat 383; first sliding seat A3831; first sliding seat B3832; first drive group 384; first drive motor 3841; first coupling 3842; first converter 3843; first mounting block 3844; second sliding seat 385; second sliding seat B3852; second drive group 386; second drive motor 3861; second coupling 3862; second converter 3863; second mounting block 3864; telescopic frame 39; curing mechanism 40; curing frame 41; curing frame slider 411; insulation box 42; curing channel 421; positioning plate 422; positioning groove 423; curing device 43; slide cylinder 441; slide telescopic rod 442; control mechanism 50. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," and "horizontal" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Example 1:

[0036] This embodiment provides a guidewire forming device 100 for coating the outer surface of a core wire of a guidewire to form a coating layer. The aforementioned guidewire can be used to guide an instrument into a non-vascular cavity to perform a medical procedure at a predetermined location. Typically, the structure of such a guidewire mainly includes an inner core wire and a coating layer located outside the core wire, wherein the coating layer can be formed on the surface of the core wire by the guidewire forming device.

[0037] Figure 1 FIG. 1 shows a simplified structural diagram of the guide wire forming device 100 of this embodiment. Figure 1As shown, the guide wire forming equipment 100 includes a frame 10, at least a pair of clamping mechanisms 20, a coating mechanism 30, a curing mechanism 40 and a control mechanism 50, wherein the frame 10 is in the shape of a rectangular frame, and a slide rail is provided on it along the length direction (that is, the long side of the rectangular frame), and a pair of clamping mechanisms 20 are respectively installed at the two ends of the frame 10 along the length direction (that is, on the two short sides of the rectangular frame), for fixing the two ends of the core wire 1 and tightening the core wire 1; the coating mechanism 30 and the curing mechanism 40 are both slidably installed on the slide rails, and the coating mechanism 30 is used to coat the core wire 1 tightened on the clamping mechanism during its sliding process, and the curing mechanism 40 is used to cure the guide wire coated by the coating mechanism 30 during its sliding process; the control mechanism 50 is installed near the frame 10, and a control screen is provided on the frame 10, and the control screen has operation keys such as a start button and an off button, and the control mechanism 50 is used to control the clamping mechanism 20, the coating mechanism 30 and the curing mechanism 40 to work.

[0038] In the following description of directions, “front” and “rear” directions refer to the length direction of the rack 10 , “left” and “right” directions refer to the width direction of the rack 10 , and “up” and “down” directions refer to the height direction of the rack 10 .

[0039] In this embodiment, a pair of slide rails are provided on the rack 10, namely, a left slide rail 111 disposed on the left long side of the rack 10 and a right slide rail 112 disposed on the right long side of the rack 10, and the coating mechanism 30 and the curing mechanism 40 are slidably disposed on the left slide rail 111 and the right slide rail 112 respectively (as shown in FIG. Figure 1 As shown, the coating mechanism 30 is mounted on the right slide rail 112, and the curing mechanism 40 is mounted on the left slide rail 111. In actual situations, the coating mechanism 30 can also be mounted on the left slide rail 111, and the curing mechanism 40 can be mounted on the right slide rail 112, and the orientations can be adjusted accordingly. A curing drive motor 12 is mounted at the end of the left slide rail 111, and a coating drive motor 13 is mounted at the end of the right slide rail 112. Both motors are servo motors, which are used to drive the curing mechanism 40 and the coating mechanism 30 to slide on the left slide rail 111 and the right slide rail 112, respectively. In this embodiment, the coating mechanism 30 and the curing mechanism 40 are respectively arranged on the slide rails on both sides, which facilitates the mutual coordination of the two processes during processing to ensure the integrity of the core wire coating. Specifically, the coating mechanism 30 and the curing mechanism 40 can not only slide forward and backward along the slide rail, but can also move left and right (or extend and retract) in the width direction. Therefore, if the two slide to the intersection during the processing, the mechanism on one side can be extended and retracted to avoid the mechanism on the other side, so as to ensure the integrity of the coating and curing of the core wire 1.

[0040] At least one pair of clamping mechanisms 20 is disposed opposite to each other on the frame 10 , and the pair of clamping mechanisms 20 have the same structure, so only one side of the clamping mechanism 20 is described in detail herein.

[0041] Figure 2 FIG. 2 shows a simplified structural diagram of the clamping mechanism 20 of this embodiment.

[0042] like Figure 1 As shown, two pairs of clamping mechanisms 20 (ie, four clamping mechanisms 20) are installed on the frame 10. Two clamping mechanisms 20 are installed at the front and rear ends of the frame 10 respectively. The clamping mechanisms 20 at the front and rear ends correspond to each other and are arranged relative to each other. Figure 2 As shown, each clamping mechanism 20 comprises a clamping frame 21, a positioning plate 22, a clamping claw 23, and a clamping drive assembly 24. The clamping frame 21 is movably mounted on the short side of the frame 10 via a cylinder assembly 25 at the bottom. The cylinder assembly 25 can propel the clamping frame 21 forward and backward (or extend and retract) relative to the frame 10. The positioning plate 22 is fixed to one end of the clamping frame 21 and defines a through hole 221 through which the end of the core wire 1 passes. The clamping claw 23 is mounted on the clamping frame 21 and located on one side of the positioning plate 22. It is used to grasp and secure the end of the core wire 1 passing through the through hole 221.

[0043] The clamping drive group 24 is installed at the other end of the clamping frame 21, and is used to drive the clamping claw 23 to rotate. Specifically, the clamping drive group 24 contains a rotating motor 241 and a rotating rod 242. The rotating motor 241 is fixed on the end of the clamping frame 21 away from the positioning plate 22. One end of the rotating rod 242 is installed on the output shaft of the rotating motor 241 through the clamping coupling 243, and the other end is connected to the clamping claw 23, so that the rotating motor 241 can drive the clamping claw 23 to rotate so that the core wire 1 rotates and adjusts its direction. After the core wire 1 is coated and cured once, the rotating motor 241 can be used to drive the core wire 1 to rotate a certain angle (such as 90°) to change its direction, and the uncoated part of the side of the core wire 1 can be coated and cured; and after the coating and curing are completed, it can be rotated in the opposite direction by 90° for coating and curing, and so on. After multiple rotations, coating and curing, it is ensured that the coating layer formed after the core wire is coated can meet the predetermined thickness requirements. In this embodiment, the rotating motor 241 can be a stepper motor; such as Figure 2 As shown, the clamping jaw 23 can be a cylinder clamping jaw, which has a finger cylinder 231 and a pair of clamping arms 232. The pair of clamping arms 232 are installed on one side of the finger cylinder 231. The side of the finger cylinder 231 away from the clamping arms 232 is connected to the rotating rod 242. The clamping arms 232 are driven by the finger cylinder 231 to approach and separate from each other, thereby achieving the tightening and loosening of the end of the core wire 1.

[0044] In this embodiment, if Figure 2 As shown, the clamping mechanism 20 on one side can be provided with multiple clamping mechanisms 20 (two are arranged side by side on the left and right in the figure) to form a clamping mechanism group. Each clamping mechanism 20 and the corresponding clamping mechanism 20 on the object side can fix and tighten a core wire. Setting multiple clamping mechanisms 20 can fix multiple core wires at the same time. The number of clamping mechanisms 20 can be increased or decreased according to actual needs.

[0045] The specific method for the clamping mechanism 20 to fix and tighten the core wire 1 is as follows: insert the end of the core wire 1 from the through hole 221, and make the clamping claw 23 grasp the end of the inserted core wire 1 to fix the end of the core wire 1; then control the cylinder assembly 25 to drive the clamping frame 21 to move to tighten the core wire 1 (the clamping mechanisms 20 at both ends of the frame 10 respectively fix the two ends of the core wire 1, and then both or one of them move away from each other to achieve tightening).

[0046] Figure 3 FIG. 3 shows a simplified structural diagram of the coating mechanism 30 of this embodiment. Figure 3 As shown, the coating mechanism 30 comprises a coating rack 31, a coating liquid supply assembly, a coating assembly, and a moving assembly. The coating rack 31 is slidably mounted on a slide rail (specifically, the right slide rail 112). The coating liquid supply assembly comprises a liquid storage vessel 32 mounted on the coating rack 31, a supply pump 33, and a delivery pipe. The liquid storage vessel 32 is a storage bottle containing coating liquid. The liquid storage vessel 32 is fixed to the coating rack 31 via a fixing bracket 321, and coating liquid is manually added to the storage bottle. The supply pump 33 is a peristaltic pump placed on the coating rack 31. The peristaltic pump is connected to a delivery pipe. The delivery pipe can be divided into an input delivery pipe and an output delivery pipe 34. One end of the input delivery pipe is inserted into the liquid storage vessel 32, and the other end is connected to the peristaltic pump (not shown in the figure). The output delivery pipe 34 is led out from the peristaltic pump and connected to the coating assembly. The liquid outlet end of the output delivery pipe 34 has a liquid outlet for discharging liquid from the coating assembly. The supply pump 33 can deliver the coating liquid in the liquid storage container 32 to the coating assembly through the delivery tube. The coating liquid is a PTFE solution. The peristaltic pump can control the supply flow of the coating liquid by controlling the peristaltic speed. The peristaltic pump can also control the thickness of the coating layer formed by coating the core wire 1 by following the speed of the coating frame 31, so that the coating can be evenly applied.

[0047] like Figure 3-Figure 6 As shown, the coating assembly contains a first coating seat 35 and a second coating seat 36 corresponding to each other, and a coating space 37 for the core wire 1 to pass through is formed between the first coating seat 35 and the second coating seat 36. The liquid outlet end of the output delivery pipe 34 is arranged on the side of the coating assembly, and the liquid outlet thereon can drip liquid toward the coating space 37.

[0048] In this embodiment, if Figure 3 and Figure 6 As shown, the first coating seat 35 is located above the second coating seat 36. Specifically, the first coating seat 35 includes a first coating mounting seat 351 and a first coating block 352 fixed on the first coating mounting seat 351. The second coating seat 36 includes a second coating mounting seat 361 and a second coating block 362 fixed on the second coating mounting seat 361. Figure 4 As shown, the first coating block 352 has a first coating action surface 3521 for contacting the core wire 1. Figure 5 As shown, the second coating block 362 has a second coating surface 3621 for contacting the core wire 1. The first coating surface 3521 and the second coating surface 3621 are arranged relative to each other, so that the above-mentioned coating space 37 is formed between the first coating surface 3521 and the second coating surface 3621. Before coating the core wire 1, the supply pump 33 can be started first. The supply pump 33 pre-fills the delivery pipe with coating liquid, and the output delivery pipe 34 pre-coats the coating liquid on the first coating surface 3521 and / or the second coating surface 3621. This can speed up the subsequent coating process and also ensure the coating integrity of the core wire 1.

[0049] In addition, in this embodiment, the area of ​​the first coating action surface 3521 is smaller than the area of ​​the second coating action surface 3621, so that the second coating block 362 has a covered portion vertically covered by the first coating block 352 and an exposed portion exposed to the first coating block 352. The delivery tube can drop the coating liquid on the exposed portion during the movement of the coating rack 31, so that the coating liquid can be coated on the surface of the core wire 1 during the movement of the coating rack 31. Figure 4 As shown, a fixing groove 3511 is provided on the side of the first coating mounting seat 351, and the liquid outlet end of the output delivery pipe 34 can be fixed on the fixing groove 3511 so that the liquid outlet of the output delivery pipe 34 is aligned with the exposed part of the second coating block 362. When the core wire 1 is accommodated in the coating space 37, the best position is when the liquid outlet is moved to be aligned with the core wire 1 located on the exposed part, so that the coating liquid can be accurately dripped onto the core wire 1, and the coating liquid is evenly coated on the surface of the core wire 1 during the movement of the first coating block 352 and the second coating block 362 along the core wire 1. The liquid outlet end of the output delivery pipe 34 is preferably installed on the front side of the moving direction of the coating mechanism 30, which is also the side with the exposed part of the second coating block 362, to ensure that the coating liquid can be immediately coated by the first coating block 352 and the second coating block 362 after being dripped onto the core wire 1. Figure 3 、 Figure 4 The position of the output delivery pipe 34 in the figure only shows a preferred installation position. In practice, the position and direction of the output delivery pipe 34 can be adjusted according to actual needs, as long as it can deliver the coating liquid to the coating space 37.

[0050] A telescopic frame 39 is mounted on the coating frame 31 via a telescopic cylinder, and a coating assembly is mounted on the telescopic frame 39. The telescopic frame 39 can drive the first coating seat 35 and the second coating seat 36 to telescopically move in the lateral direction, thereby accommodating the core wire 1 into the coating space 37. In addition, the first coating seat 35 and / or the second coating seat 36 can be vertically movably arranged on the coating frame 31 via a moving assembly, and when moving, the first coating seat 35 and the second coating seat 36 move closer to or away from each other. When moving toward each other and approaching each other, the core wire 1 can be clamped between the first coating action surface 3521 of the first coating block 352 and the second coating action surface 3621 of the second coating block 362.

[0051] In this embodiment, the first coating seat 35 and the second coating seat 36 are both capable of moving vertically as an example for description. Figure 3 As shown, the moving assembly includes a fixed plate 381, a guide rail 382, ​​a first sliding seat 383, a first drive group 384, a second sliding seat 385 and a second drive group 386. The fixed plate 381 is installed on the telescopic frame 39 and can move laterally under the drive of the telescopic frame 39; the guide rail 382 is vertically fixed on the fixed plate 381, used to guide the vertical movement of the first coating seat 35 and the second coating seat 36; the first sliding seat 383 is slidably installed on the guide rail 382, ​​and is installed with the first coating seat 35; the first drive group 384 is used to drive the first sliding seat 383 to slide along the guide rail 382; the second sliding seat 385 is slidably installed on the guide rail 382, ​​and is installed with the second coating seat 36; the second drive group 386 is used to drive the second sliding seat 385 to slide along the guide rail 382.

[0052] Specifically, the first drive group 384 and the second drive group 386 may adopt the same drive structure, such as Figure 3As shown, the first drive group 384 includes a first drive motor 3841, a first coupling 3842, a first converter 3843 and a first mounting block 3844. The first coupling 3842 connects the output shaft of the first drive motor 3841 and the first converter 3843. The first converter 3843 is connected to the first mounting block 3844. The first coating seat 35 is mounted on the first mounting block 3844. When the first drive motor 3841 rotates, it is transmitted to the first converter 3843 through the first coupling 3842. The first converter 3843 converts the rotation into up and down movement of the first coating seat 35. The second drive group 386 includes a second drive motor 3861, a second coupling 3862, a second converter 3863, and a second mounting block 3864. The second coupling 3862 is connected to the output shaft of the second drive motor 3861 and the second converter 3863. The second converter 3863 is connected to the second mounting block 3864. The second coating seat 36 is mounted on the second mounting block 3864. When the second drive motor 3861 rotates, the rotation is transmitted to the second converter 3863 through the second coupling 3862. The second converter 3863 converts the rotation into up and down movement of the second coating seat 36. The first drive motor 3841 and the second drive motor 3861 are both servo motors. The first converter 3843 and the second converter 3863 are devices that can convert rotation into linear motion, such as a screw.

[0053] In addition, in order to ensure the smoothness of movement, such as Figure 6 As shown, a pair of guide rails 382 can be provided, namely guide rail A3821 and guide rail B3822. Correspondingly, two first sliding seats 383 are provided, namely first sliding seats A3831 and first sliding seats B3832. First sliding seat A3831 is fixed to the inside of the first mounting block 3844, and first sliding seat B3832 is fixed to the inside of the first coating seat 35. Second sliding seats 385 are also provided with two, namely second sliding seat A (not shown) and second sliding seat B3852. Second sliding seat A is fixed to the inside of the second mounting block 3864 (refer to the installation method of first sliding seat A3831), and second sliding seat B3852 is fixed to the inside of the second coating seat 36. First sliding seat A3831 and second sliding seat A are both slidably mounted on guide rail A3821, and first sliding seat B3832 and second sliding seat B3852 are both slidably mounted on guide rail B3822. A pair of guide rails 382 are spaced apart on the fixed plate 381, and the second drive group 386 can be arranged at the space, so that the entire moving assembly structure is compact, the layout span is reduced, the volume is reduced, and it is easier to install and use.

[0054] like Figure 3 and Figure 4As shown, the first coating seat 35 further includes a first coating mounting block 353 for mounting the first coating mounting seat 351 on the first mounting block 3844. The first coating mounting block 353 is plate-shaped and can mount at least one first coating mounting seat 351. Each first coating mounting seat 351 is equipped with a first coating block 352. Similarly, as Figure 3 and Figure 5 As shown, the second coating seat 36 also includes a second coating mounting block 363 for mounting the second coating mounting seat 361 on the second mounting block 3864. The second coating mounting block 363 is plate-shaped and can be mounted on at least one second coating mounting seat 361. Each second coating mounting seat 361 is mounted within a second coating block 362. Each first coating block 352 corresponds to each second coating block 362 in a one-to-one manner, forming a coating space 37. The number of first coating mounting seats 351 (first coating blocks 352) and second coating mounting seats 361 (second coating blocks 362) installed depends primarily on the number of core wires 1. In this embodiment, two are provided, enabling simultaneous coating of two core wires 1. This number also corresponds to the logarithm of the clamping mechanism 20.

[0055] In this embodiment, the working process of the coating mechanism 30 is as follows: in the initial state, the first coating action surface 3521 and the second coating action surface 3621 are separated by a certain distance, and the telescopic frame 39 is retracted to the side of the coating frame 31. When it is necessary to start coating the core wire 1, the telescopic cylinder is first started to drive the telescopic frame 39 and the first coating seat 35 and the second coating seat 36 installed thereon to extend close to the core wire 1 (that is, extend toward the side where the core wire 1 is located). Figure 1In the figure, the coating mechanism 30 is located on the right side of the core wire 1, so when the work starts, the telescopic frame 39 is first driven to extend to the left side), the core wire 1 will enter between the first coating action surface 3521 and the second coating action surface 3621, until the core wire 1 can be aligned with the liquid outlet of the conveying pipe, the telescopic cylinder stops extending, and then the moving component is started to move the first coating seat 35 and / or the second coating seat 36 toward each other, and the distance between the first coating action surface 3521 and the second coating action surface 3621 gradually decreases until the core wire 1 is clamped between the first coating action surface 3521 and the second coating action surface 3621. Subsequently, the coating drive motor 13 can be started to drive the entire coating mechanism 30 to move along the guide rail. During the movement, the liquid outlet will drop the coating liquid on the core wire 1 located on the exposed part, so that the first coating action surface 3521 and the second coating action surface 3621 coat the core wire 1 during the movement. It should be noted that the first coating action surface 3521 and the second coating action surface 3621 do not completely clamp the core wire 1, but rather to the extent that the first coating action surface 3521 and the second coating action surface 3621 can slide along the length direction of the core wire 1 while being able to apply the coating liquid to the core wire 1.

[0056] Figure 7 and Figure 8 FIG. 4 shows a simplified structural diagram of the curing mechanism 40 of this embodiment. Figure 7 and Figure 8 As shown, the curing mechanism 40 includes a curing frame 41, an insulation box 42, a curing device 43 and a movable component. A curing frame slider 411 is provided at the bottom of the curing frame 41, and the curing frame 41 is slidably set on a slide rail (specifically the left slide rail 111) through the curing frame slider 411; the insulation box 42 is in the shape of a rectangle, and has a curing channel 421 for the guide wire to enter along its length direction. The curing channel 421 can be a groove structure that is open to one side (open to the side where the guide wire is located) and passes through the front and rear ends of the insulation box 42. The two ends of the curing channel 421 have positioning pieces 422 fixed on the two end surfaces of the insulation box 42. The middle part of the positioning piece 422 corresponds to the curing channel 421 to form a positioning groove 423 that is open to one side. The slot width h of the positioning groove 423 (that is, the dimension in the height direction in the drawing) is smaller than the slot width H of the curing channel 421. On the one hand, it can limit the front and rear range of the curing channel 421, and on the other hand, it can form a positioning and limit for the core shaft 1 to prevent it from shaking significantly. The curing device 43 is a quartz heating rod or a curing lamp, which is installed on the heat preservation box 42 and is used to cure the guide wire. When the curing frame 41 slides along the slide rail, it can move along the length direction of the guide wire with the heat preservation box 42, thereby gradually curing the guide wire.

[0057] The movable component is used to drive the thermal insulation box 42 to move relative to the curing frame 41, so that the thermal insulation box 42 is close to the curing frame 41 or away from the curing frame 41. The movable component includes a slide cylinder 441 and a slide telescopic rod 442. The slide cylinder 441 is fixed on the curing frame 41; one end of the slide telescopic rod 442 is connected to the slide cylinder 441, and the other end is connected to the thermal insulation box 42. The slide cylinder 441 can drive the slide telescopic rod 442 to move telescopically left and right in the horizontal direction, thereby driving the thermal insulation box 42 to move left and right in the horizontal direction. When the thermal insulation box 42 moves in a direction away from the curing frame 41, the guide wire can be accommodated from the open end of the curing channel 421 into the curing channel 421 for curing; when the thermal insulation box 42 moves in a direction close to the curing frame 41, the guide wire can be exposed from the open end of the curing channel 421.

[0058] The guidewire forming process of the guidewire forming device 100 proposed in this embodiment has the following steps:

[0059] Step 1: Fix the core wire 1: Fix the two ends of the core wire 1 to be coated on the clamping mechanisms 20 at both ends of the frame 10 respectively, and control the clamping mechanism 20 through the control mechanism 50 to tighten the core wire 1 (the specific method of fixing and tightening the core wire 1 has been described in the previous text and will not be repeated here).

[0060] Step 2: Coating of core wire 1: First, start the supply pump 33 to pre-fill the delivery pipe with coating liquid (the coating liquid comes from the liquid storage container 32), and apply the coating liquid to the coating space 37 between the first coating mounting seat 351 and the second coating mounting seat 361 through the delivery pipe 43; then, control the first coating seat 35 and the second coating seat 36 of the coating mechanism 30 by the control mechanism 50 to move to the upper and lower sides of the core wire 1, so that part of the core wire 1 is in the coating space 37, and the first coating seat 35 and the second coating seat 36 move toward each other to clamp the core wire 1; then, control the coating drive motor 13 by the control mechanism 50 to start, and drive the coating mechanism 30 along the slide rail (with The coating liquid is supplied from the liquid storage container 32 to the coating space 37 through the delivery pipe (the coating liquid supply during the movement is mainly for the exposed part). When the coating liquid is applied to the outer surface of the core wire 1, a core wire with a coating layer is gradually formed (i.e., a guide wire, and the guide wire at this time is a semi-finished guide wire). After reaching the designated area, the coating drive motor 13 is turned off, the coating mechanism 30 stops sliding in the length direction, and then the moving component is started to control the first coating block 352 and the second coating block 362 to move toward each other to loosen the guide wire, and retract to its original position under the drive of the telescopic frame.

[0061] Step 3: Guidewire curing: The curing mechanism 40 is turned on by the control mechanism 50, and the curing device 43 starts heating. After reaching the preset temperature, the slide cylinder 441 is started, and the heat preservation box 42 is pushed out and moved to the vicinity of the guidewire semi-finished product coated in step 2 through the slide telescopic rod 442, and part of the guidewire semi-finished product is accommodated in its curing channel 421, and then slides along the slide rail (specifically the left slide rail 111) to uniformly cure the guidewire. After reaching the set position, the slide cylinder 441 retracts and the curing mechanism 40 is reset. At this point, one coating and curing are completed, and the guidewire is gradually formed.

[0062] Step 4: Rotate the guide wire to coat and cure again: After completing step 3, the control mechanism 50 controls the clamping mechanism to drive the guide wire that has been coated and cured once in the above step 3 to rotate 90°, repeat steps 2-3, and then control the clamping mechanism to drive the guide wire to rotate 90° in the opposite direction, repeat steps 2-3, and so on, until the thickness of the coating layer formed after coating and curing reaches the predetermined thickness and the processing is completed.

[0063] After the processing is completed, first open the clamping claw 23 in the clamping mechanism 20 at the front end of the frame 10, loosen the processed guide wire, and place the end on the clamping mechanism 20, then open the clamping claw 23 in the clamping mechanism 20 at the rear end of the frame 10, loosen the processed guide wire, and pass it through the through hole 221 on the positioning plate 22, and coil and recycle the guide wire from the rear end.

[0064] In step 2, the coating liquid can be pre-applied to the first coating surface 3521 and the second coating surface 3621. This allows the core filament 1 to be coated immediately after entering between the two surfaces, ensuring the integrity of the coating. The thickness of each coating can be controlled by controlling the speed of the supply pump 33 and the flow rate of the coating liquid in the delivery pipe. The desired coating thickness can be achieved through multiple coatings.

[0065] Since the core wire 1 is in contact with the first coating action surface 3521 and the second coating action surface 3621 mainly on the upper and lower surfaces during the coating process, the left and right sides may not be completely coated. Therefore, in step four, it is necessary to rotate 90°, adjust the original left and right sides to the upper and lower sides, and coat again, so as to ensure that the surface of the entire core wire 1 is coated.

[0066] In actual processing, steps 2 and 3 can be performed independently or simultaneously. In independent operation, in step 2, coating mechanism 30 first coats the core wire 1 from beginning to end (i.e., to a predetermined position), and then initiates step 3, allowing curing mechanism 40 to cure the coated semi-finished guide wire from beginning to end. In a synchronized operation, coating mechanism 30 coats the core wire 1 from the front, while curing mechanism 40 cures the coated portion from the rear. Clearly, the latter coating and curing method is more efficient and produces better results.

[0067] Beneficial effects of this embodiment:

[0068] The guidewire forming device and process provided in this embodiment comprises a clamping mechanism 20, a coating mechanism 30, and a curing mechanism 40. When in use, the clamping mechanism 20 is first used to clamp and tighten the core wire 1. The coating mechanism 30 is then manipulated to move near the core wire 1 so that the core wire 1 is clamped in the coating space 37 on the coating mechanism 30. The coating mechanism 30 moves along the slide rail and the core wire 1. During the movement, the supply pump 33 of the coating mechanism 30 can deliver the coating material (coating liquid) through the delivery pipe and extrude it into the coating space 37, so that the coating mechanism 30 uniformly coats the core wire 1 clamped thereon during the movement. The curing mechanism 40 is then manipulated to move near the coated guide wire and gradually cures the coating liquid coated on the outside of the core wire 1 through the movement to form a coating layer. This embodiment uses an extrusion molding method to form a coating layer coated on the outer surface of the core wire 1 during the movement. This coating molding method is simpler and easier to operate than the existing heat shrink process, and the coating is uniform. The formed coating layer has a good sealing effect and is not easy to expose the core wire, greatly improving the safety of surgical treatment.

[0069] This embodiment is provided with a stable clamping mechanism, which ensures the stability of the guide wire during the coating movement by driving the clamping claws to rotate through a stepping motor; the coating mechanism adopts a peristaltic pump to extrude the solution, so that the solution drips onto the surface of the core wire 1, and then the coating mechanism is driven to move by a servo motor, and the first coating block and the second coating block are used to apply the solution evenly to ensure that the guide wire coating is smooth; the coating and curing mechanism can wrap the semi-finished guide wire that has been coated, and at the same time allow the curing device 43 to perform high-temperature curing during the movement, with fast curing speed and good effect, and the structural device is simple and effective.

[0070] The coating liquid of this embodiment is a PTFE material solution, which is coated on the outer surface of the core wire through extrusion molding to form a coating layer. This can avoid the restrictive factor of the import of the original coating material (PTFE heat shrink tube) in the zebra guidewire, reduce costs and increase production at the same time; on the other hand, compared with the PTFE heat shrink molding coating layer molding method, the extrusion coating molding method of this embodiment can make the bonding between the coating layer and the core wire more reliable and firm, greatly improving the coating effect.

[0071] Example 2:

[0072] This embodiment differs from the first embodiment described above in that the coating mechanism 30 and the curing mechanism 40 are positioned on the same side slide rail (i.e., only one of the long sides of the frame 10 is provided with a slide rail). When the coating mechanism 30 and the curing mechanism 40 are positioned on the same side, the coating mechanism 30 blocks the sliding direction of the curing mechanism 40, which can easily prevent the curing mechanism 40 from curing the core wire portion corresponding to the blocked area (generally, the end area of ​​the core wire), resulting in incomplete coating of the core wire. To address this issue, an up-and-down lifting mechanism can be added at the end of the rail 11 to allow the coating mechanism 30 to be raised and lowered. To cure the core wire corresponding to the blocked area, the coating mechanism 30 can be first moved out of the blocked area using the up-and-down lifting mechanism (e.g., moved up or down to above or below the blocked area), and then the curing mechanism can be slid back to the blocked area to cure the core wire in that area. While this solves the problem of incomplete coating and curing, it is inherently more complex in structure. Therefore, this embodiment is relatively more complex in structure and operation steps than the first embodiment.

[0073] Example 3:

[0074] This embodiment differs from the aforementioned embodiment 1 in that the structures of the clamping mechanisms 20 at both ends of the frame 10 are slightly different. The clamping mechanism 20 at one end is identical to the clamping mechanism 20 in embodiment 1, while the clamping mechanism 20 at the other end eliminates the cylinder assembly 25 at the bottom of the clamping frame 21. In this embodiment, when the core wire 1 is tightened, only one side of the clamping mechanism 20 (the side with the cylinder assembly 25 installed) needs to be moved to achieve tightening. Because the clamping mechanism 20 at the other end eliminates the cylinder assembly 25 at the bottom, in order to ensure that both ends of the core wire 1 are located at the same horizontal plane, the height of the clamping frame at this end needs to be increased, such as by increasing the thickness of the clamping frame 21 on this side or by adding a pad to the bottom of the clamping frame 21.

[0075] Example 4:

[0076] The difference between this embodiment and the above-mentioned embodiment 1 is that: the moving component on the coating mechanism 30 is only provided with a first drive group, that is, the second drive group is cancelled. In this embodiment, the second coating seat 36 can be directly fixed on the fixed plate, and the first coating seat 35 is driven up and down only by the first drive group (the driving method is the same as that of embodiment 1), so as to realize the approach and distance between the first coating seat 35 and the second coating seat 36. When approaching, they can clamp the core wire 1, and when moving away, they can release the core wire 1.

[0077] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A guide wire forming device, used for coating the outer surface of the core wire of the guide wire to form a coating layer, characterized in that: include: A frame having slide rails provided along its length; At least one pair of clamping mechanisms, mounted at both ends of the frame, for fixing and tightening the core wire; a coating mechanism, slidably mounted on the slide rail, for coating the core wire stretched on the clamping mechanism; a curing mechanism, slidably mounted on the slide rail, for curing the guide wire after being coated by the coating mechanism; as well as A control mechanism, used to control the clamping mechanism, coating mechanism and curing mechanism to operate; Wherein, the coating mechanism comprises: A coating rack, slidably arranged on the slide rail; A coating liquid supply assembly comprising a liquid storage container, a supply pump and a delivery pipe mounted on the coating rack; a coating assembly comprising a first coating seat and a second coating seat corresponding to each other, wherein a coating space for the core wire to pass through is formed between the first coating seat and the second coating seat; and a moving assembly, mounted on the coating frame, driving the first coating seat and the second coating seat to move toward each other, or driving the first coating seat to move toward the second coating seat, or driving the second coating seat to move toward the first coating seat, so as to clamp the core wire between the first coating seat and the second coating seat; The liquid storage container stores coating liquid, and the supply pump transports the coating liquid from the liquid storage container to the coating space through the transport pipe.

2. The guide wire forming device according to claim 1, characterized in that The first coating seat is located above the second coating seat, and the first coating seat includes a first coating mounting seat and a first coating block fixed on the first coating mounting seat, and the second coating seat includes a second coating mounting seat and a second coating block fixed on the second coating mounting seat. The first coating block has a first coating action surface for contacting the core wire; The second coating block has a second coating active surface for contacting the core wire; The first coating action surface and the second coating action surface are arranged opposite to each other, and the coating space is formed therebetween.

3. The guide wire forming device according to claim 2, characterized in that The area of ​​the first coating active surface is smaller than that of the second coating active surface, so that the second coating block has a covered portion vertically covered by the first coating block and an exposed portion exposed to the first coating block.

4. The guide wire forming device according to claim 3, characterized in that The liquid outlet end of the delivery tube is fixed on one side of the first coating mount, and this side is the side where the second coating block has the exposed portion. The delivery tube can drop the coating liquid onto the core wire at the exposed portion while following the movement of the coating rack.

5. The guide wire forming device according to any one of claims 2 to 4, characterized in that: The coating mechanism further includes a telescopic frame movably mounted on the coating frame. The mobile assembly comprises: a fixed plate, mounted on the telescopic frame; A guide rail, vertically fixed to the fixed plate; a first sliding seat, slidably mounted on the guide rail and having the first coating mounting seat mounted thereon; as well as The first driving group is used to drive the first sliding seat to slide along the guide rail.

6. The guide wire forming device according to claim 5, characterized in that The mobile assembly also contains: a second sliding seat, slidably mounted on the guide rail and having the second coating mounting seat mounted thereon; and The second driving group is used to drive the second sliding seat to slide along the guide rail.

7. The guide wire forming device according to any one of claims 1 to 4, characterized in that: The curing mechanism comprises: a curing rack, slidably arranged on the slide rail; an insulated box having a curing channel for the guide wire to enter; a movable assembly, configured to drive the heat preservation box to move relative to the curing rack so as to move the heat preservation box closer to or farther away from the curing rack; a curing device, mounted on the heat preservation box, for curing the guide wire; Wherein, the active component contains: a slide cylinder fixed on the curing frame; A sliding table telescopic rod, one end of which is connected to the sliding table cylinder and the other end of which is connected to the thermal insulation box; The slide cylinder drives the slide telescopic rod to move telescopically in the lateral direction.

8. The guide wire forming device according to any one of claims 1 to 4, characterized in that: The clamping mechanism comprises: A clamping frame, movably arranged on the frame; A positioning plate is fixed to one end of the clamping frame and is provided with a through hole for the end of the core wire to pass through; A clamping claw is installed on the clamping frame and is located on one side of the positioning plate, and is used to grab and fix the end of the core wire passing through the through hole; The clamping drive group is installed at the other end of the clamping frame and is used to drive the clamping claws to rotate.

9. The guide wire forming device according to claim 8, characterized in that: The clamping drive group includes: A rotating motor is fixed on the clamping frame. One end of the rotating rod is mounted on the output shaft of the rotating motor through a clamping coupling, and the other end is connected to the clamping claw.

10. A guide wire forming process, characterized in that: The guide wire forming device according to any one of claims 1 to 9 comprises at least the following steps: Step 1: Fixing the core wire: fixing the two ends of the core wire to be coated on a pair of clamping mechanisms at both ends of the frame respectively, and controlling the clamping mechanisms through a control mechanism to tighten the core wire; Step 2: Core wire coating: first, start the supply pump to pre-fill the delivery pipe with coating liquid, and apply the coating liquid to the coating space between the first coating seat and the second coating seat through the delivery pipe; then, control the first coating mounting seat and the second coating mounting seat of the coating mechanism to move to the upper and lower sides of the core wire through the control mechanism, so that the core wire is in the coating space, and move the first coating mounting seat and the second coating mounting seat toward each other to clamp the core wire; then, control the coating mechanism to slide along the slide rail to coat the core wire through the control mechanism. During the coating process, the supply pump delivers the coating liquid from the liquid storage container through the delivery pipe to the coating space; Step 3: Curing the guide wire: The curing mechanism is controlled by the control mechanism to move to the vicinity of the guide wire coated in step 2, to accommodate part of the guide wire therein, and then slide along the slide rail to cure the guide wire, thus completing one coating and curing step; Step 4: Rotate the guide wire to coat and cure again: The control mechanism controls the clamping mechanism to drive the guide wire that has completed the coating and curing in the above step 3 to rotate 90°, and repeat steps 2-3 for coating and curing; after completion, the clamping mechanism is controlled again to drive the guide wire that has completed the coating and curing in the above step 3 to rotate 90°, and repeat steps 2-3 for coating and curing; and so on, until the thickness of the coating layer formed after coating and curing reaches a predetermined thickness.

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