KR102272935B1 - Straightness improvement apparatus for reflow process of catheter - Google Patents

Abstract

The present invention relates to a straightness improvement device for a catheter reflow process, comprising: a reflow heater for spraying hot air to a resin tube made of an elastomer material molded into a tube shape by an extrusion molding process and a wire bundle braided by a braiding process on a mandrel and bonding the resin tube and the wire bundle to complete a braided tube; and a straightness maintaining unit including a disk provided above the reflow heater and having an inner surface facing the outer circumferential surface of the braided tube which is passed through and drawn out from the reflow heater at a constant speed, regulating bending due to hot air heating of the braided tube, and maintaining a straight state. In developing a braided catheter shaft that is applied to the diagnosis and treatment of cardiovascular diseases, straightness can be improved when performing a reflow process of a multi-lumen catheter having a complex shape.

Description

Straightness improvement device for catheter reflow process {STRAIGHTNESS IMPROVEMENT APPARATUS FOR REFLOW PROCESS OF CATHETER}

The present invention relates to an apparatus for improving straightness for a catheter reflow process, and more particularly, in developing a braided catheter shaft applied to the diagnosis and treatment of cardiovascular diseases, the straightness of a complex-shaped miltilumen catheter when performing the reflow process. It relates to a straightness improvement device for the catheter reflow process that enables improvement.

A catheter refers to a minimally invasive medical device in the form of a tube that can be used for diagnosis and treatment of lesions.

The process required to manufacture a catheter is divided into two major categories: an extrusion process of molding the tube shape and size with a medical polymer, and a post-processing process of improving the shape and physical properties of the manufactured tube.

Among them, the post process includes braiding, reflow, tipping, butt welding, and the like.

These post-processes mainly share the method of supplying thermal energy to the polymer material to realize the desired specifications.

Among them, the braiding process and the reflow process protect the kinking phenomenon from appearing when the catheter passes through the curved vascular structure, or when manufacturing the braided tube shape so that it can be stably inserted by maintaining the axial strength. Refers to the braiding process and thermoforming process used, and is essential for enhancing the performance of pushing (Pushability and Trackability) along the path of the catheter.

The braided shaft used in the catheter is manufactured through the following process.

First, the resin of the elastomer material is molded into a tube shape through an extrusion molding process.

Then, a bundle is manufactured by braiding a metal or polymer wire having a diameter of 10 to 100 um through a braiding process.

Then, the prepared wire bundle and the polymer tube are mounted on the mandrel, and after bonding to each other through hot air during the lamination process (reflow process), the mandrel is removed to finally complete the braided tube.

The reflow process derives an optimal process by changing the temperature of the hot air and the transfer speed of the heater, and covers the outermost heat-shrinkable tube for stable tube molding to induce stable braided tube production in all directions during the reflow process.

The braided tube is composed of various materials depending on the purpose, but is generally formed in the form of a triple layer as shown in FIG. 6, and the innermost liner (10, Liner), a braiding bundle (20) in the middle layer, and a polymer out jacket (30, Out-jacket) in the outermost layer.

In particular, according to the purpose or scene of the procedure, the lumen inside the tube is manufactured in various shapes, or a catheter shaft composed of several lumens (Multi-lumen), such as the "catheter" of Patent Registration No. 10-1035748, is also manufactured.

In particular, when the shape of the lumen is complicated, it is difficult to implement the shape of the lumen using the metal mandrel used in the past. Therefore, a polymer mandrel having a high melting point that is easy to manufacture into a shape of a relatively complex lumen is used. do.

In this case, it is not easy to implement the straightness of the polymer mandrel, and the straightness of the catheter shaft after the reflow process is frequently significantly reduced, and this causes a problem in that the catheter surface roughness is defective.

In other words,

Registered Patent No. 10-1035748

The present invention was invented to improve the above problems, and in developing a braided catheter shaft applied to the diagnosis and treatment of cardiovascular diseases, to improve straightness when performing the reflow process of a miltilumen catheter having a complex shape. It is to provide an apparatus for improving straightness for the catheter reflow process.

In order to achieve the above object, the present invention is a resin tube made of an elastomer material molded into a tube shape by an extrusion molding process, and a wire bundle braided by a braiding process mounted on a mandrel. Reflow heater for completing the braided tube by spraying and bonding; and a disk provided above the reflow heater and having an inner surface facing the outer circumferential surface of the braided tube and drawn out from the reflow heater at a constant speed, regulating bending caused by hot air heating of the braided tube And it will be possible to provide a straightness improvement device for the catheter reflow process, characterized in that it includes a straightness maintaining unit for maintaining a straight state.

Here, the straightness maintaining unit further includes a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk, and the braided tube passes through the disk housing and the disk. characterized.

In this case, the straightness maintaining unit includes a disc housing disposed on the upper side of the reflow heater and having a seating groove for seating the disc, and a disc housing orthogonal to the upper surface of the reflow heater to hold the disc housing to the ripple. It further includes a plurality of support legs for supporting and supporting the disk housing while being spaced apart from the row heater by a predetermined distance, wherein the braided tube passes through the disk housing and the disk.

In addition, the straightness maintaining unit, characterized in that it further comprises a tube guide groove formed by cutting from one edge of the disk-shaped disk toward the center of the disk to have a width greater than or equal to the diameter of the braided tube.

In addition, a tube guide groove is cut and formed to have a width greater than or equal to the diameter of the braided tube from one edge of the disk-shaped disk toward the center of the disk, and a tube guide groove formed through the disk and near the inner end of the tube guide groove and a first wedge slot disposed in the tube guide groove and disposed perpendicular to the tube guide groove, the inner end inner surface of the tube guide groove forming an inner surface facing the outer peripheral surface of the braided tube, the tube guide groove The outer peripheral surface of the braided tube is guided along the inner surface of the inner end, and straightness is maintained.

In addition, a tube guide groove is cut and formed to have a width greater than or equal to the diameter of the braided tube from one edge of the disk-shaped disk toward the center of the disk, and a tube guide groove formed through the disk and near the inner end of the tube guide groove and a first wedge slot disposed in the tube guide groove and disposed perpendicular to the tube guide groove, the inner end inner surface of the tube guide groove forming an inner surface facing the outer peripheral surface of the braided tube, the tube guide groove The outer peripheral surface of the braided tube is guided along the inner surface of the inner end, and straightness is maintained.

And, it is formed through the disk, is disposed near the inner end of the tube guide groove, characterized in that it further comprises a first wedge slot disposed perpendicular to the tube guide groove.

In addition, the straightness maintaining unit includes a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk, and the braided disk from one edge of the disk-shaped disk toward the center of the disk. A tube guide groove cut to have a width greater than or equal to the diameter of the tube, a first wedge slot formed through the disk, disposed near the inner end of the tube guide groove, and disposed perpendicular to the tube guide groove; A second wedge slot formed through the disk housing at a position corresponding to the first wedge slot and having the same size and shape as the first wedge slot, and the second wedge slot and the first wedge slot are sequentially passed through The upper end portion is exposed from the disk, characterized in that it further comprises a horizontal wedge (cotter) for fixing the disk to the disk housing.

In addition, the horizontal wedge has an exposed piece that sequentially passes through the second wedge slot and the first wedge slot and has an upper end exposed from the disk, has a greater width than the exposed piece, and is caught and fixed to the lower surface of the disk housing It has an upper end that is characterized in that it comprises a support piece for supporting and supporting the disk housing.

In addition, the disk housing includes a flat body block, a tube through hole formed through the center of the main body block and having a larger diameter than the braided tube, and the disk having a disk shape with the tube through hole as the center. Correspondingly, it further comprises a first stepped groove recessed in a semicircular shape, and a second stepped groove recessed in a rectangular shape from the first stepped groove to the edge of the body block to guide the insertion of the disk. do.

In addition, it further comprises a tube guide groove that is cut and formed to have a width greater than or equal to the diameter of the braided tube from one edge of the disk-shaped disk toward the center of the disk, and the center of the inner end of the tube guide groove is the tube It is characterized in that it coincides with the center of the through hole.

In addition, a plurality of support legs disposed orthogonally to the lower surface of the disk housing to support and support the disk housing are formed through the edge of the body block by the number of each of the plurality of support legs, so that each of the plurality of support legs is formed. It characterized in that it further comprises a fastening hole fastened to the upper end and the fastener.

On the other hand, the present invention is a reflow heater for heating the braided tube with hot air to complete the braided tube; a disk provided on the reflow heater and having an inner surface facing the outer circumferential surface of the braided tube and being drawn out from the reflow heater at a constant speed; and a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk, wherein the disk housing and the disk regulate bending due to hot air heating of the braided tube and straighten it. It is also possible to provide a straightness improvement device for the catheter reflow process, characterized in that to maintain.

In addition, the present invention is a reflow heater for heating the braided tube with hot air to complete the braided tube; A seating groove disposed on the upper side of the reflow heater and provided above the reflow heater to seat a disk having an inner surface facing the outer circumferential surface of the braided tube that passes through and is drawn out from the reflow heater at a constant speed This provided disc housing; and a plurality of support legs disposed orthogonally to an upper surface of the reflow heater to support and support the disk housing while spacing the disk housing from the reflow heater by a predetermined distance, wherein the disk housing and the disk are braided. Of course, it is also possible to provide an apparatus for improving straightness for the catheter reflow process, characterized in that it regulates the bending according to the hot air heating of the tube and maintains a straight state.

According to the present invention having the configuration as described above, the following effects can be achieved.

First, the present invention has the feature that it is possible to maintain a straightness by passing the hot air heated catheter during the catheter reflow process under the guidance of the disk, so that it is possible to produce a product of excellent quality.

In addition, the present invention has the effect of minimizing the interference of the hot air generated by the reflow heater during hot air heating by providing a support structure spaced apart a predetermined distance between the disk and the reflow heater.

And, the present invention provides a structure for seating the disk so that the catheter can be transferred in one direction through the center of the disk, but the disk seating structure shares the center with the disk and at the same time maintains a straight line with the center of the discharge side of the reflow heater. By helping the mandrel to maintain straightness, it has the effect of preventing buckling or defects in advance.

Above all, the present invention prevents the occurrence of a fatal problem in which thermal damage occurs due to the proximity of the catheter to the hot air generating part of the reflow heater by performing the reflow process using a structure including a disk for maintaining straightness. It's very useful in terms of what you can do.

In particular, as described above, the problem of increasing surface roughness due to thermal damage on the surface of the catheter is a fatal side effect to the recipient, such as thrombus or damage to the blood vessel when the catheter is introduced into the blood vessel. In that there is a risk of causing a catheter having a smooth surface while maintaining the normal surface roughness, the fatal problem described above does not occur at all by using the device for maintaining straightness according to the present invention. .

In other words, if the shape of the lumen in the catheter shaft is complicated or consists of multiple lumens, it is difficult to implement the shape of the lumen using the existing metal mandrel. A polymer mandrel having a point is used, and in this case, it is not easy to implement the straightness of the polymer mandrel, so that the straightness of the catheter shaft after the reflow process is not only frequently reduced, but also the catheter surface roughness is poor. It can prevent problems from occurring.

Specifically, the device according to the present invention is designed in the form of a guide that can maintain the straightness of the catheter shaft at the top of the heater in the reflow device, and when this is used, the straightness of the catheter shaft is remarkably improved and a high-quality result is formed it can be

In addition, when the device according to the present invention is utilized, the catheter shaft is located in the center of the hot air generator in the reflow equipment, and it is possible to maintain a stable surface roughness by reducing damage to the catheter surface due to heat It is a very useful invention. .

1 is a perspective conceptual view showing the overall structure of a device for improving straightness for a catheter reflow process according to an embodiment of the present invention;
Figure 2 is an exploded perspective conceptual view listing all parts of the straightness maintenance unit, which is a main part of the straightness improvement device for the catheter reflow process according to an embodiment of the present invention;
3 is a perspective conceptual view showing a state in which the straightness improvement device for the catheter reflow process according to an embodiment of the present invention is installed on the upper part of the reflow heater and not installed.
Figure 4 is a conceptual diagram comparing the molding state of the catheter shaft manufactured according to the case where the straightness improvement device for the catheter reflow process is not used and the case where it is utilized according to an embodiment of the present invention
5 is a conceptual diagram comparing the difference in the degree of surface roughness of the manufactured catheter shaft according to the case where the straightness improvement device for the catheter reflow process is not used and the case where it is utilized according to an embodiment of the present invention
6 is a partial incision internal isometric conceptual view showing the internal structure of a braided tube for a general catheter shaft

Advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the present invention.

And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described to avoid obscuring the present invention.

In addition, like reference numerals refer to like elements throughout the specification, and terms used (referred to) in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase, and elements and operations referred to as 'comprising (or having)' do not exclude the presence or addition of one or more other elements and operations. .

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs.

Also, terms defined in commonly used dictionary are not to be interpreted ideally or excessively unless defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, Figure 1 is a perspective view showing the overall structure of the straightness improvement device for a catheter reflow process according to an embodiment of the present invention.

And, Figure 2 is an exploded perspective view listing all parts of the straightness maintenance unit, which is a main part of the straightness improvement device for the catheter reflow process according to an embodiment of the present invention.

And, Figure 3 is a perspective conceptual view showing a state in which the straightness improvement device for the catheter reflow process according to an embodiment of the present invention is installed and not installed on the upper portion of the reflow heater 100, respectively.

In addition, Figure 4 is a conceptual diagram comparing the molding state of the manufactured catheter shaft according to the case of not using the straightness improvement device for the catheter reflow process according to an embodiment of the present invention and the case of use

In addition, Figure 5 is a conceptual diagram comparing the difference in the degree of surface roughness of the catheter shaft manufactured according to the case in which the straightness improvement device for the catheter reflow process according to an embodiment of the present invention is not utilized and the case where it is utilized.

For reference, a transparent arrow in FIG. 1 indicates a transport direction of the braided tube 300 .

As shown in the present invention, a resin tube made of an elastomer material molded into a tube shape by an extrusion molding process and a wire bundle braided by a braiding process are mounted on a mandrel by spraying hot air to bond them together. It can be understood that the straightness maintaining unit 200 is arranged on the reflow heater 100 for completing the tube 300 .

The straightness maintaining unit 200 is a disk having an inner surface facing the outer peripheral surface of the braided tube 300 that is provided on the reflow heater 100 and is drawn out through the reflow heater 100 at a constant speed ( 210), and is provided to regulate bending according to hot air heating of the braided tube 300 and to maintain a straight state.

It goes without saying that the present invention can be applied to the above-described embodiments, and can also be applied to the following various embodiments.

First, the straightness maintaining unit 200 may further include a disk housing 220 disposed on the upper side of the reflow heater 100 and provided with a seating groove for seating the disk 210 .

Here, the braided tube 300 passes through the disk housing 220 and the disk 210 .

At this time, the straightness maintaining unit 200 is a tube guide groove that is cut and formed with a width greater than or equal to the diameter of the braided tube 300 from one edge of the disk 210 having a disk shape toward the center of the disk 210 ( 212) may be further provided.

In addition, the inner end inner surface of the tube guide groove 212 forms an inner surface facing the outer peripheral surface of the braided tube 300, along the inner end inner surface of the tube guide groove 212, the outer peripheral surface of the braided tube 300 This guide will guide you to keep going straight.

In addition, since the center of the inner end of the tube guide groove 212 coincides with the center of the tube through hole 223 to be described later, it will be possible to help maintain straightness of the braided tube 300 .

On the other hand, the straightness maintaining unit 200 is disposed orthogonally to the upper surface of the reflow heater 100 to support and support the disk housing 220 while spacing the disk housing 220 from the reflow heater 100 by a certain distance. A plurality of support legs 230 may be further provided.

The plurality of support legs 230 are provided to minimize interference of hot air generated by the reflow heater 100 .

Here, the straightness maintaining unit 200 is formed through the disk housing 220 as shown in FIGS. 1 and 2 and a plurality of fastening holes 240 disposed at positions corresponding to the upper ends of the support legs 230 are further added. can be provided

At this time, the upper end of the support leg 230 and the disk housing 220 through the fastening hole 240 may be fastened and fixed as shown in FIG. 3 with a bolt or the like.

On the other hand, the straightness maintaining unit 200 further includes the first and second wedge slots 211 and 222 and the horizontal wedges 250 and cotter to maintain the seating and fixed state of the disk 210 with respect to the disk housing 220 . Of course, it can be provided.

First, the first wedge slot 211 is formed through the disk 210 and is disposed near the inner end of the tube guide groove 212 and is disposed orthogonally to the tube guide groove 212 .

In addition, the second wedge slot 222 is formed through a position corresponding to the first wedge slot 211 of the disk housing 220 to have the same size and shape as the first wedge slot 211 .

In addition, the horizontal wedge 250 sequentially passes through the second wedge slot 222 and the first wedge slot 211 so that the upper end is exposed from the disk 210 , and the disk 210 is fixed to the disk housing 220 . will make it

The horizontal wedge 250 sequentially passes through the second wedge slot 222 and the first wedge slot 211 to expose the upper end of the exposed piece 251 from the disk 210 and the exposed piece 251. An embodiment of a structure including a support piece 252 having a large width and having an upper end secured to the lower surface of the disk housing 220 to support and support the disk housing 220 may be applied.

In FIG. 2 , there are a small and a large support piece 252 in height. When the support piece 252 is supported by a support leg 230 on the lower surface of the disk housing 220 , the large support leg 230 . In consideration of the length of the disk 210 is fixed to the disk housing 220 and at the same time, the disk housing 220 is also provided to support and support the support legs 230 together.

On the other hand, the small height of the support piece 252 is, in order to fix the casing 110 of the reflow heater 100, the head portion of the fastener protruding from the upper surface of the casing 110 as shown in the left part of FIG. When the support leg 230 is omitted on the 120 and the disk housing 220 is mounted directly, the height of the support piece 252 is designed as much as the protruding height of the head.

On the other hand, the disc housing 220 includes a flat body block 221 in order to seat and fix the disc 210 and a tube through hole 223 that is formed through the center of the body block 221 and has a larger diameter than the braided tube. ), and a structure provided with first and second stepped grooves 224 and 225 here.

The first stepped groove 224 is formed to be recessed in a semicircular shape to correspond to the diameter of the disk 210 having a disk shape centering on the here, that is, the tube through hole 223 .

The second stepped groove 225 is formed to be recessed in a rectangular shape from the first stepped groove 224 to the edge of the body block 221 to guide the insertion of the disk 210 .

Accordingly, the operator inserts and pushes the disk 210 from the second stepped groove 225 to bring the outer circumferential surface of the disk 210 into close contact with the first stepped groove 224 and insert the first wedge slot 211 into the second wedge slot. When the horizontal wedge 250 is mounted in line with the 222, the disk 210 and the disk housing 220 are easily and reliably coupled.

In particular, in that the center of the inner end of the tube guide groove 212 and the center of the tube through hole 223 can be matched only with the above-described operation, it can greatly help to maintain the straightness of the braided tube 300 .

Therefore, the difference in the final result according to whether or not the straightness maintaining unit 200 according to the present invention is used is shown in FIG. 4 .

That is, when the straightness maintaining unit 200 is not used, it can be seen that the straightness of the braided tube 300 is not maintained as shown in FIG. 4( a ), so that there is no utility value as a product.

In contrast, when the straightness maintaining unit 200 is used, it can be seen that the straightness is remarkably improved as shown in FIG. 4( b ), and thus the useful value as a product is excellent.

On the other hand, the difference in the surface roughness (粗度), that is, the surface roughness of the braided tube 300 according to whether the straightness maintaining unit 200 according to the present invention is used is as shown in FIG. 5 .

That is, when the straightness maintaining unit 200 is not used, the straightness of the braided tube 300 cannot be maintained during the reflow process as shown in FIG. There was a problem in that the surface roughness was increased due to heat damage.

Such a problem may cause serious problems, such as when the catheter enters the blood vessel, it may cause a blood clot in the corresponding part or damage the blood vessel.

In contrast, when the straightness maintaining unit 200 is used, as shown in FIG. 5(b) , the above-described problems disappear, and it can be confirmed that the braided tube 300 having a smooth surface while maintaining a normal surface roughness is molded.

Hereinafter, the action and effect of the device for improving straightness for a catheter reflow process according to a preferred embodiment of the present invention will be looked at as follows.

First, the present invention relates to a braided tube (a braided tube () by spraying hot air to a resin tube made of an elastomer material molded into a tube shape by an extrusion molding process and a wire bundle braided by a braiding process mounted on a mandrel. Reflow heater 100 for completing 300); and a disk 210 provided on the reflow heater 100 and having an inner surface facing the outer circumferential surface of the braided tube 300 that is provided on the reflow heater 100 and is drawn out through the reflow heater 100 at a constant speed, the braided tube (300) characterized in that it comprises a straightness maintaining unit 200 for regulating the bending according to the heating of the hot air and maintaining a straight state, the braided tube 300 heated by the hot air during the reflow process of the catheter is the disk 210 ), it is possible to maintain straightness by passing through the guide, so it has the advantage of being able to produce high-quality products.

And, according to the present invention, it is possible to minimize the interference of hot air generated in the reflow heater 100 during hot air heating by providing a support leg 230 that is spaced apart by a predetermined distance between the disk 210 and the reflow heater 100 . have an effect

In addition, the present invention provides a structure of the disk housing 220 for seating the disk 210 so that the braided tube 300 can be transferred in one direction through the center of the disk 210 , but the disk housing 220 is the disk 210 . ) and at the same time maintaining a straight line with the center of the discharge side of the reflow heater 100, thereby helping the mandrel maintain straightness, thereby preventing buckling or defects in advance.

Above all, the present invention performs a reflow process using a straightness maintaining unit 200 including a disk 210 for maintaining straightness, so that the hot air generating portion of the reflow heater 100 has a braided tube 300 . It is very useful in that it can prevent in advance the occurrence of a fatal problem in which thermal damage occurs due to the proximity of .

In particular, as described above, the problem of increase in surface roughness due to thermal damage generated on the surface of the braided tube 300 is, when the catheter is introduced into the blood vessel, a thrombus occurs in the cervix or damage to the blood vessel, etc. In terms of causing a fatal side effect to the recipient, by utilizing the straightness maintaining unit 200 according to the present invention, the above-mentioned fatal problem does not occur at all, and the braided tube 300 having a smooth surface while maintaining normal surface roughness. It has the special advantage that it can be molded.

In other words, if the shape of the lumen in the catheter shaft is complicated or consists of multiple lumens, it is difficult to implement the shape of the lumen using the existing metal mandrel. A polymer mandrel having a point is used, and in this case, it is not easy to implement the straightness of the polymer mandrel, so that the straightness of the catheter shaft after the reflow process is not only frequently reduced, but also the catheter surface roughness is poor. It can prevent problems from occurring.

Specifically, the straightness maintaining unit 200 according to the present invention is designed in the form of a guide that can maintain the straightness of the braided tube 300 at the top of the reflow heater 100, and when used, the braided tube 300 The straightness of the product can be dramatically improved and high-quality results can be molded.

In addition, when the device according to the present invention is used, the braided tube 300 is located in the center of the reflow heater 100, and it is very useful, such as being able to maintain a stable surface roughness by reducing damage to the catheter surface due to heat it is an invention

As described above, the present invention provides an apparatus for improving straightness for a catheter reflow process to improve straightness when performing a reflow process of a miltilumen catheter having a complex shape in developing a braided catheter shaft applied to the diagnosis and treatment of cardiovascular diseases It can be seen that the basic technical idea is to provide

And, within the scope of the basic technical spirit of the present invention, many other modifications and applications are also possible for those of ordinary skill in the art.

100...reflow heater
110... the casing of the reflow heater (100)
120...head of fasteners
200... straightness maintenance unit
210...disc
211...1st wedge slot
212...tube guide home
220...disc housing
221...Body block
222...2nd wedge slot
223... tube through hole
224...First step groove
225...Second step groove
230...support leg
240...fastening hole
250... transverse wedge
251...Exposed edition
252...Support
300...braided tube

Claims (14)

Reflow for completing the braided tube by spraying hot air to attach a resin tube made of an elastomer material molded into a tube shape by the extrusion molding process and a wire bundle braided by a braiding process mounted on a mandrel. heater; and
It is provided on the top of the reflow heater and includes a disk having an inner surface facing the outer circumferential surface of the braided tube that is drawn out through the reflow heater at a constant speed, and regulates bending due to hot air heating of the braided tube, Straightness improvement device for catheter reflow process, characterized in that it comprises a straightness maintaining unit for maintaining a straight forward state.
The method according to claim 1,
The straightness maintaining unit,
It is disposed on the upper side of the reflow heater further comprising a disk housing provided with a seating groove for seating the disk,
The braided tube is straightness improving device for a catheter reflow process, characterized in that through the disc housing and the disc.
The method according to claim 1,
The straightness maintaining unit,
a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk;
It further comprises a plurality of support legs disposed orthogonally to the upper surface of the reflow heater to support and support the disk housing while spacing the disk housing from the reflow heater by a predetermined distance,
The braided tube is straightness improving device for a catheter reflow process, characterized in that through the disc housing and the disc.
The method according to claim 1,
The straightness maintaining unit,
Straightness improvement apparatus for catheter reflow process, characterized in that it further comprises a tube guide groove that is formed to have a width greater than or equal to the diameter of the braided tube from one edge of the disk-shaped disk toward the center of the disk.
4. The method according to claim 2 or 3,
a tube guide groove formed by incision from one edge of the disk-shaped disk toward the center of the disk to have a width greater than or equal to the diameter of the braided tube;
Further comprising a first wedge slot formed through the disk, disposed near the inner end of the tube guide groove and disposed perpendicular to the tube guide groove,
The inner end inner surface of the tube guide groove forms an inner surface facing the outer peripheral surface of the braided tube, and the outer peripheral surface of the braided tube is guided along the inner end inner surface of the tube guide groove and straightness is maintained. Straightness improvement device for catheter reflow process.
4. The method according to claim 2 or 3,
a tube guide groove formed by incision from one edge of the disk-shaped disk toward the center of the disk to have a width greater than or equal to the diameter of the braided tube;
a first wedge slot formed through the disk, disposed near the inner end of the tube guide groove, and disposed perpendicular to the tube guide groove;
Straightness improvement apparatus for catheter reflow process, characterized in that it further comprises a second wedge slot formed through the disk housing at a position corresponding to the first wedge slot and having the same size and shape as the first wedge slot.
5. The method according to claim 4,
Straightness improvement apparatus for catheter reflow process, which is formed through the disk, is disposed near the inner end of the tube guide groove, and further comprises a first wedge slot disposed orthogonal to the tube guide groove.
The method according to claim 1,
The straightness maintaining unit,
a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk;
a tube guide groove formed by incision from one edge of the disk-shaped disk toward the center of the disk to have a width greater than or equal to the diameter of the braided tube;
a first wedge slot formed through the disk, disposed near the inner end of the tube guide groove, and disposed perpendicular to the tube guide groove;
a second wedge slot formed through the disk housing at a position corresponding to the first wedge slot and having the same size and shape as the first wedge slot;
Catheter reflow process, characterized in that it sequentially passes through the second wedge slot and the first wedge slot, the upper end is exposed from the disk, and further comprises a transverse wedge (cotter) for fixing the disk to the disk housing For straightness improvement device.
9. The method of claim 8,
The horizontal wedge is
an exposed piece passing through the second wedge slot and the first wedge slot sequentially and exposing an upper end of the disc from the disk;
Straightness improvement device for catheter reflow process, characterized in that it has a larger width than the exposed piece and includes a support piece having an upper end that is hooked and fixed to the lower surface of the disk housing and supporting the disk housing.
4. The method according to claim 2 or 3,
The disk housing,
a flat body block;
A tube through hole formed through the center of the body block and having a larger diameter than the braided tube;
a first step groove recessed in a semicircular shape to correspond to the diameter of the disk-shaped disk with the tube through-hole as a center;
Straightness improvement apparatus for catheter reflow process, characterized in that it further comprises a second stepped groove recessed in a rectangular shape from the first stepped groove to the edge of the body block to guide the insertion of the disk.
11. The method of claim 10,
Further comprising a tube guide groove formed by incision from one edge of the disk-shaped disk toward the center of the disk to have a width greater than or equal to the diameter of the braided tube,
The straightness improvement device for the catheter reflow process, characterized in that the center of the inner end of the tube guide groove coincides with the center of the tube through hole.
11. The method of claim 10,
a plurality of support legs disposed orthogonally to a lower surface of the disk housing to support and support the disk housing;
Straightness improvement device for catheter reflow process, characterized in that it further comprises a fastening hole formed through the edge of the main body block by the number of each of the plurality of support legs is fastened to the upper end of each of the plurality of support legs and fasteners.
a reflow heater heating the braided tube with hot air to complete the braided tube;
a disk provided on the reflow heater and having an inner surface facing the outer circumferential surface of the braided tube and being drawn out from the reflow heater at a constant speed; and
and a disk housing disposed on the upper side of the reflow heater and provided with a seating groove for seating the disk,
The disk housing and the disk,
Straightness improvement device for catheter reflow process, characterized in that it regulates bending according to hot air heating of the braided tube and maintains a straight-line state.
a reflow heater heating the braided tube with hot air to complete the braided tube;
A seating groove disposed on the upper side of the reflow heater and provided above the reflow heater to seat a disk having an inner surface facing the outer circumferential surface of the braided tube that passes through and is drawn out from the reflow heater at a constant speed This provided disc housing; and
and a plurality of support legs disposed orthogonally to the upper surface of the reflow heater to support and support the disk housing while spacing the disk housing from the reflow heater by a predetermined distance;
The disk housing and the disk,
Straightness improvement device for catheter reflow process, characterized in that it regulates bending according to hot air heating of the braided tube and maintains a straight-line state.

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