KR20170100357A - Wire coating devices and Wire coating methods - Google Patents

Abstract

According to the present invention, a wire coating device and a wire coating method are disclosed. The present invention relates to the wire coating device which comprises: a wire supply unit configured to supply a wire; a graphene forming unit configured to form a graphene layer in the wire from the wire supply unit; and a coating unit configured to laminate an insulation layer on the wire formed on the graphene layer.

Description

TECHNICAL FIELD [0001] The present invention relates to wire coating devices and wire coating methods,

The present invention relates to an apparatus and a method, and more particularly, to a device for coating a wire and a method of coating the wire.

Metal leads are essential for electrical connections in semiconductors and electronics. Copper can also be produced from natural metals, and since the smelting process is relatively simple, it has long been used as a conductor. In the modern industrial society, copper is also used as a key material in the electronics industry because its thermal conductivity and electrical conductivity are second only to silver (Ag). In addition, since the resistance value is low, copper having high purity is used in cryogenic materials and the like.

In order to increase the conductivity of copper or the like, copper may be used as a core to form a graphene layer surrounding the core. It is possible to increase the current flowing through the conductor even if the width of the conductor is maintained or reduced by forming a graphene layer.

Generally, graphite has a structure in which a plate-shaped two-dimensional graphene sheet in which carbon atoms are connected in a hexagonal shape is laminated. Recently graphene was stripped from graphite and its properties were investigated.

The most notable feature is that when electrons move from graphene, the mass of electrons flows like zero. This means that the electrons flow at the speed at which the light travels in the vacuum, that is, the light flux. Graphene also has an unusual half-integer quantum Hall effect on electrons and holes. Also, to date, the electron mobility of graphene is known to have a high value of about 20,000 to 50,000 cm 2 / Vs. Specifically, it has a charge mobility of 150 times that of copper and has an allowable current density of 100 times that of copper.

The large-scale graphene films for stretchable transparent electrodes (nature07719), published on January 14, 2009 in nature, have been developed to a great extent recently, A manufacturing process of graphene using chemical vapor deposition (CVD) is disclosed.

On the other hand, motors that convert electric energy into mechanical energy and obtain rotational power are widely used not only in household electric appliances but also in industrial devices. In such a motor, the wire is wound in a coil shape, and the output and size of the motor can be determined according to the number of turns of the coil and the raw material of the wire.

In recent years, a motor with high output power has been demanded while reducing the size. However, it is difficult to minimize the size of the motor by increasing the number of windings wound on the coil. In order to secure insulation of the coil, Is not appropriate.

Embodiments of the present invention provide a wire coating apparatus and a wire coating method.

According to one aspect of the present invention, there is provided a wire coating apparatus including a wire feed unit for feeding a wire, a graphen forming unit for forming a graphene layer on a wire from the wire feed unit, And a coating unit for laminating the substrate.

The wire feeding unit may include a wire feeding roll around which the wire is wound, a wire guide roller for guiding the movement of the wire unwound from the wire feeding roll, and a wire feeding roller for winding the wire.

The conductive line may be formed of at least one of Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, brass, bronze, white brass, stainless steel, Ge, and combinations thereof.

The lead wire further includes a core and a catalyst metal layer disposed to surround the outer surface of the core.

The catalyst metal layer may be formed of a metal such as copper, nickel, cobalt, titanium, platinum, zirconium, vanadium, rhodium, ≪ / RTI >

In addition, the graphene forming unit injects a reaction gas containing a carbon source to form a graphene layer by synthesizing graphene on the surface of the conductor by chemical vapor deposition.

The coating unit may further include: a coating chamber installed to be connected to an outlet of the graphen forming unit; a lamination part for laminating an insulating material on a lead wire on which the graphene layer is formed; And a weight portion for delaying the entry into the lamination portion of the formed conductor.

In addition, the coating unit may further include a collecting unit for collecting the conductive line on which the insulating layer is stacked.

According to another aspect of the present invention, there is provided a wire coating method comprising: a winding step of winding a metal wire from a winding; a synthesizing step of forming a graphene layer by synthesizing graphene on the surface of the wire, A coating step of laminating and coating an insulating material on the conductive wire, and a winding step of winding the coated metal conductive wire.

Also, in the synthesis step, a reactive gas containing a carbon source is injected to form a graphene layer on the surface of the conductor by chemical vapor deposition.

Embodiments of the present invention can improve the electrical conductivity by reducing the width of the conductor by forming a graphene layer and an insulating layer on the conductor and protect the graphene layer formed on the conductor through the insulation layer And even if the conductor is continuously supplied, the process of forming the graphene and the process of stacking the insulating layer can be continuously carried out.

1 is a front view showing a wire coating apparatus according to an embodiment of the present invention.
2 is an operational view showing an operation of a wire coating apparatus according to an embodiment.
Figure 3 shows a cross-sectional view of a coated wire according to one embodiment, and Figure 4 shows a cross-sectional view of a coated wire according to another embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

1 is a front view showing a wire coating apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a wire coating apparatus 10 includes a wire feed unit 100, a graphen forming unit 200, a coating unit 300, and a control unit 400.

The lead wire feed unit 100 is a device for feeding a lead S. The lead wire feed unit 100 includes a lead wire feed roll 110, a lead wire guide roller 120 and a lead wire feed roller 130.

A wire s is wound around the wire feed roll 110. The wire S may further include a catalyst metal layer 21a.

The wire (S) may be made of copper as a raw material, but there is no particular limitation on the raw material included in the wire (S) according to the present invention. For example, the raw material according to the present invention needs only to absorb carbon to grow graphene when the chemical vapor deposition method is performed, and there is no particular restriction on the selection of other materials. The raw material according to the present invention may be at least one selected from the group consisting of Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, brass ), Bronze, white brass, stainless steel, Ge, and combinations thereof.

The wire guide roller 120 functions to guide the movement of the wire S released from the wire feed roll 110.

The wire conveying roller 130 performs a function of assisting the conveyance of the lead wire S by rotating and receiving the power. For example, the power may include a motor or a pneumatic or hydraulic cylinder connected to the wire feed roller 130.

The lead wire supply chamber 140 is a chamber for receiving the lead wire feed roll 110, the lead guide roller 120, and the lead wire feed roller 130.

The wire feeding unit 100 may further include a first sensor 150 capable of measuring a moving speed of the wire S between the wire guide roller 120 and the wire conveying roller 130.

The wire feed chamber 140 is not provided with a vacuum means for applying a vacuum to the wire feed chamber 140, but the present invention is not limited thereto. That is, the wire supply chamber 140 may be provided with a vacuum means (for example, a vacuum pump or the like) so as to apply a vacuum so that the inner space of the wire supply chamber 140 has a certain degree of vacuum.

On the other hand, the graphene forming unit 200 forms graphene on the surface of the lead wire S from the lead wire feeding unit 100 to produce a graphene forming wire G on which the graphene layers 20b and 20c are formed.

The graphene forming unit 200 is a reactor for thermochemical vapor deposition and ICP-CVD (Inductive Coupled Plasma Chemical Vapor Deposition), and includes a gas containing carbon (CH4, C2H2, C2H4, CO Etc.), and then the internal heating device is operated to adjust the internal temperature so that carbon is absorbed in the conductor S passing through the space inside. Concretely, the behavior of recrystallization / crystal growth of copper varies depending on temperature and temperature. If the temperature is raised rapidly for a few seconds to a few minutes, the grain size becomes very large, and crystals grow in a specific direction. Under these conditions, graphene with a very low resistance value can be formed.

When carbon is absorbed into the conductor S, the graphene forming unit 200 stops heating and cools the conductor at a cooling rate of about 30 to 600 DEG C per minute (30 DEG C / min to 600 DEG C / min). The graphene forming unit 200 cools the conductor S and causes graphene to grow on the surface of the conductor S. [

On the other hand, according to one embodiment, graphene is synthesized on the conductor S by CVD, but the present invention is not limited thereto. The method of synthesizing the graphene of the present invention on the conductor S may be various. For example, a method of directly depositing the conductor on the conductor S by PECVD (Plasma Enceased Chemical Vapor Deposition) ) Or the like is arranged on the conductor (S) and then annealed, or indirectly deposited on the conductor (S) by an electrophoretic deposition method. Among these various methods, when the graphene layers 20b and 20c are formed on the conductor S by the CVD method, the electrical conductivity is high, the uniformity is excellent, and the coating thickness of the graphene can be efficiently controlled. It is efficient to use. That is, in the CVD method, since the thickness of the graphene layers 20b and 20c becomes thicker as the flow rate of the CH4 gas and the deposition temperature are higher and the cooling rate after the formation of the graphene layers 20b and 20c is delayed, The coating thickness of the graphene can be efficiently controlled. In addition, since the graphene can be deposited even under an atmospheric pressure environment by using the CVD method, there is an advantage that it can be manufactured in a continuous process.

The graphene forming unit 200 is not provided with a vacuum means for applying a vacuum, but the present invention is not limited thereto. The graphene forming unit 200 may be provided with a vacuum means so that the internal space is in a constant vacuum state.

The graphene forming unit 200 is formed in a single space by heating the wire S to absorb carbon into the wire S and cooling the wire S to grow the graphene. The present invention is not limited thereto. That is, the reaction part and the cooling part are separated into separate spaces, and the conductor S is heated in the reaction part so that carbon is absorbed in the conductor S. The conductor S in which the carbon is absorbed is transferred to the cooling section to cool the conductor S so that graphene grows.

Hereinafter, the conductor S on which the graphene layers 20b and 20c are formed on the outer surface of the conductor S is referred to as a graphene forming conductor G. [

The coating unit 300 is a unit for laminating an insulating material on the graphene forming conductor G. The coating unit 300 includes a coating chamber 380, a first conveying roller 310, A second conveying roller 330, a weight portion 320, a lamination guide roller 340, a lamination portion 350, a drying portion 351, and a collecting portion. The coating chamber 380 is installed to be connected to the outlet of the graphen forming unit 200.

The first conveying roller 310 performs a function of assisting conveyance of the graphene forming wire G in the graphen forming unit 200 by rotating and receiving the power. The first conveying roller 310 may apply a predetermined tension to the conductor S to prevent the graphene forming conductor G from being bent. For example, the power may include a motor or a pneumatic or hydraulic cylinder connected to the first conveying roller 310.

The second conveying roller 330 performs a function of assisting conveying of the graphene forming conductor G into the stacking portion 350 by rotating and receiving the power. The second conveying roller 330 can transfer the graphene forming wire G into the lamination portion 350 and rotate the graphene forming wire G in the stacking portion 350 320, respectively. For example, the power may include a motor or a pneumatic or hydraulic cylinder connected to the second conveying roller 330.

The lamination guide roller 340 serves to guide the movement of the graphene forming wire G conveyed by the second conveying roller 330.

The layered portion 350 is formed by forming a precursor layer on the surface of the conductor S on which the graphene layers 20b and 20c are formed by immersing the conductor S on which the graphene layers 20b and 20c are formed in an insulating coating solution or slurry can do. The lamination portion 350 can be performed by a continuous roll-to-roll process.

According to one embodiment, the laminating portion 350 is coated with an insulating coating liquid. The insulating coating solution may be enamel, varnish, epoxy, or the like. In the lamination part 350, through holes, through which the conductor S can pass, are formed on both sides facing each other. The graphen forming wire G passes through the through holes. The graphene forming conductor G is immersed in the insulating coating liquid during the penetration, so that the insulating layers 20c and 21c can be laminated.

According to another embodiment, the laminate portion 350 may form the insulating layers 20c and 21c on the graphene forming conductor G by spraying the insulating coating liquid. The layered portion 350 may include a plurality of sprays positioned at a predetermined distance from the outer circumferential surface of the graphene forming wire G. [ For example, the plurality of sprays can be disposed at regular intervals in a ring-shaped structure. Further, the layered portion 350 according to the present invention may be provided by any one of spray coating, dip coating, spin coating, and flow coating means.

Hereinafter, the conductor S in which the insulating layers 20c and 21c are laminated on the graphene layers 20b and 20c is referred to as a graphene insulated conductor (GC).

The weight portion 320 is disposed between the stacking portion 350 and the outlet of the graphen forming unit 200. The weight portion 320 provides a space in which the graphen forming wire G can stand. The weight portion 320 may be formed so that the graphene forming wire G conveyed by the first conveying roller 310 and the conveying speed or conveying direction of the graphene forming wire G conveyed by the second conveying roller 330 The graphene forming wire G can be placed in the space of the weight portion 320. [ Particularly, the second conveying roller 330 needs to pass through the lamination part 350 by repeating the graphene forming conductor G while changing the rotating direction to increase the thickness of the insulating layers 20c and 21c. In this case, the process of graphening the graphene in the graphen forming unit 200 and the process of stacking the stacking portion 350 are performed by waiting the gravitational forming wire G conveyed by the first conveying roller 310 in the weight portion 320, The process of forming the insulating layers 20c and 21c can be performed independently. That is, the weight portion 320 is included in the wire coating device 10, and the graphene layers 20b and 21b are formed continuously in the graphene forming unit 200 by continuously connecting the lead wires S, The insulating layers 20c and 21c can be continuously stacked at the same time.

More specifically, the weight portion 320 includes a weight roller 321 and controls the vertical movement of the weight roller 321 so that the graphene forming wire G waiting in the weight portion 320 moves only in a specific direction It can be guided to move. For example, the weight roller 321 contacts the graphene forming wire G waiting in the weight portion 320 and can have a constant tension. When the length of the graphene forming wire G waiting in the weight portion 320 increases, the weight roller 321 can be lowered. Conversely, when the length of the graphene forming wire G waiting in the weight portion 320 decreases, the weight roller 321 can be raised. The weight roller 321 controls the graphene forming wire G waiting in the weight portion 320 to move only in a specific direction to prevent the graphene forming wire G from entangling. That is, the weight roller 321 can restrict the movement of the graphene composite wire S between the first conveyance roller 310 and the second conveyance roller 330 to prevent the entanglement.

The weight portion 320 may include a linear driving portion 323 connected to the weight roller 321 to linearly move the weight roller 321. The linear drive unit 323 can move the weight roller 321 up or down using the rotational force of the motor and the conveyor belt, the ball screw, and the rack gear.

The drying section 351 applies heat or dries the insulating layers 20c and 21c laminated on the graphen layers 20b and 20c of the conductor S through blowing.

The second sensor 370 monitors the moving speed of the graphene insulated wire GC between the drying unit 351 and the stacking unit 350.

The recovery unit 360 includes a recovery guide roller 361 and a collection roller 363. The recovery guide roller 361 functions to guide the movement of the graphene insulated wire GC from the drying part 351. [

According to one embodiment, the coating chamber 380 accommodates the collection unit 360, but the present invention is not limited thereto. That is, the coating chamber 380 according to the present invention may not accommodate the recovery unit 360. In this case, the wire coating apparatus 10 may have a separate recovery chamber for receiving the recovery unit 360.

The control unit 400 is an apparatus for performing overall control of the wire coating apparatus 10.

The control unit 400 may be implemented in various forms such as an electric circuit form such as a semiconductor chip or a program form and controls each part of the wire feed unit 100, the graphen forming unit 200 and the coating unit 300 .

2 is an operational view showing an operation of a wire coating apparatus according to an embodiment.

Referring to FIG. 2, the operation of the wire coating apparatus 10 according to one embodiment will be described.

The wire S wound around the wire feed roll 110 of the wire feed unit 100 is released according to the rotation of the wire feed roll 110 and guided by the lamination guide roller 340, 130 to the graphen forming unit 200 by rotation.

In the graphene forming unit 200, the conductor S is heated to a high temperature by the gas (CH4, C2H2, C2H4, CO, etc.) containing carbon previously injected and the conductor S, Absorbed. After a predetermined time has elapsed, the conductor S is cooled, and the graphene layers 20b and 20c are grown on the surface of the conductor S.

According to another embodiment, the graphen forming unit 200 may include a reaction part and a cooling part in a separate configuration. In this case, the conductive part S is heated by the reaction part to allow carbon to be absorbed into the conductive wire S, and the conductive wire S from the reaction part moves to the cooling part. And the first conveying roller 310 are stopped so that the portion of the conductor S that absorbs carbon in the reaction portion is positioned in the cooling portion. The conductor S that absorbs carbon is cooled at a predetermined cooling rate in the cooling section so that graphene grows on the surface of the wire S to form a graphene forming wire G in which the graphene layers 20b and 20c are formed do.

The graphene forming wire G is then moved into the coating chamber 380 by the first conveying roller 310 and the wire conveying roller 130. The control unit 400 stops the wire feeding roller 130 and the first feeding roller 310 when the graphene forming wire G leaves the graphen forming unit 200. In this case, the graphene forming wire G is located in the weight portion 320 of the coating unit 300.

The graphen forming wire G is moved into the coating chamber 380 from the graphen forming unit 200 by the first conveying roller 310. When the graphen-forming wire G is out of the graphen forming unit 200, the controller 400 stops the wire feed roller 130 and the first feed roller 310.

The control unit 400 controls driving units connected to the second conveying roller 330 and the collection roller 363 to allow the graphene forming conductor G to enter the inside of the stacking unit 350 by a predetermined length. In addition, the control unit 400 controls the weight driving unit 323 in accordance with the rotation direction of the collecting roller 363, so that the weight roller 321 can be raised or lowered. Specifically, when the collection roller 363 rotates in the first direction, the control section can control the weight drive section 323 so that the weight roller 321 is lifted. On the other hand, when the collection roller 363 rotates in the second direction opposite to the first direction, the control unit can control the weight drive unit 32 so that the weight roller 321 descends. Referring to FIG. 2, the first direction may be a counterclockwise direction, and the second direction may be a clockwise direction. When the recovery roller 363 rotates in the counterclockwise direction with reference to FIG. 2, the length of the wire from the portion where the recovery roller 363 is loosened to contact the weight roller 321 to the portion where the recovery roller 363 begins to be wound is increased. The control unit 400 controls the weight driving unit 323 in such a manner that the length of the lead from the portion contacting the weight roller 321 to the portion where the recovery roller 363 begins to be wound is increased to lower the weight roller 321 The tension of the graphene forming wire G between the first conveying roller 310 and the second conveying roller 330 can be kept constant. Similarly, when the collection roller 363 rotates in the clockwise direction with reference to FIG. 2, a portion where the graphene insulated wire CG is wound and contacts the weight roller 321 extends to a portion where the collection roller 363 starts winding on the collection roller 363 The length of the lead of the wire is reduced. The control unit 400 controls the weight driving unit 323 so as to increase the weight roller 321 as long as the length of the lead from the portion contacting the weight roller 321 to the portion where the recovery roller 363 begins to be wound is reduced, The tension of the graphene forming wire G between the first conveying roller 310 and the second conveying roller 330 can be kept constant.

According to another embodiment, the controller 400 can determine the length or feed rate of the wire G supplied to the graphene forming unit 200 through the first sensor 150, The length or the conveying speed of the graphene forming wire G passing through the stacking portion 350 can be determined. The control unit 400 controls the speed at which the wire feeding unit 100 supplies the wire S to the graphen forming unit 200 or the length of the wire S to form the graphen through the first sensor 150 can do. The control unit 400 can control the length or speed of the graphene forming wire G passing through the stacking unit 350 through the second sensor 370. [ The control unit 400 determines whether the length of the graphene forming wire G waiting in the weight unit 320 is increased or decreased through the first sensor 150 and the second sensor 370, 323 to determine whether the weight roller 321 is to be raised or lowered.

The control unit 400 controls the driving units connected to the rollers so that the second conveying roller 330 and the collection roller 363 rotate so that the graphene forming conductor G is passed through the stacking unit 350 and the drying unit 351 And the insulating layers 20c and 21c can be laminated on the graphene forming conductor G. [ When the insulation layers 20c and 21c are formed by a predetermined length, the controller 400 linearly moves the graphene formation wire G formed with the insulation layers 20c and 21c in the opposite direction, The graphene insulated conductor line GC having the insulating layers 20c and 21c formed thereon can be passed through the drying section 351 and the lamination section 350 again. That is, the control unit 400 repeatedly rotates the second conveying roller 330 in accordance with the continuous roll-to-roll process, repeats the graphene forming conductor G, It is possible to pass through the drying section 351 and thereby increase the thickness of the insulating layers 20c and 21c of the graphene insulated wire GC.

Specifically, the thickness of the insulating layers 20c and 21c stacked on the graphene insulated conductor GC is varied depending on the number of times that the graphene forming conductor G passes through the stacking portion 350. [ The thickness of the insulating layers 20c and 21c stacked on the graphene forming conductor G when passing through the stacking portion 350 can be determined according to the length of the stacking portion 350 and the viscosity of the insulating material. The insulating properties required for the insulating layers 20c and 21c formed when the graphen forming wire G passes through the stacking portion 350 may not be secured. At this time, the thickness of the insulating layers 20c and 21c stacked on the graphene forming conductor G can be increased by passing the graphene forming conductor G repeatedly through the stacking portion 350. [

Figure 3 schematically shows a cross-sectional view of a coated wire according to one embodiment, and Figure 4 schematically shows a cross-sectional view of a coated wire according to another embodiment.

3 and 4, the graphene forming conductor G is a conductor S on which the graphene layers 20b and 20c are formed on the surface of the conductor S. [ In the graphen-forming wire G, several graphene layers 20b and 20c are formed. The graphene forming conductor G is increased in electric conductivity by graphene, and has a larger allowable current than a general conductor of the same volume.

The graphene insulated conductor GC is a conductor S in which insulating layers 20c and 21c are laminated by coating an insulating material on the graphene layers 20b and 20c. The outer surface of the lead wire (S) is insulated. For example, when the graphene insulated conductor GC is wound to form a coil, the thickness of the insulator layers 20c, 21c of the conductor S depends on the magnitude of the allowable current flowing through the coil, Can be determined in consideration of the interval between them. The insulation layer 20c or 21c having a predetermined thickness or more should be secured in consideration of the size of the allowable current and the distance between adjacent conductors S, As described in FIG. 2, the insulating layers 20c and 21c having a predetermined thickness or more can be ensured by repeating the graphene composite wire S repeatedly a predetermined number of times or more and drawing it into the laminate portion 350.

Referring to FIG. 4, the wire S includes a core metal and a catalyst metal layer 21a disposed to surround the core. The catalytic metal layer 21a is made of a metal having excellent solubility in carbon such as copper (Cu), nickel (Ni), cobalt (Co), titanium (Ti), platinum (Pt), zirconium (Zr), vanadium ) And ruthenium (Ru).

The graphene forming wire G may have tens or hundreds of graphene layers 20b and 20c formed thereon. The catalytic metal layer 21a may absorb more carbon than the core of the conductor S and may further include a catalytic metal layer 21a to increase the thickness of the graphene layers 20b and 20c.

On the other hand, the graphene layers 20b and 20c may include a single layer or multiple layers of graphene layers 20b and 20c, but the present invention is not limited thereto. The thickness of the graphene layers 20b and 20c can be adjusted by adjusting the number of layers. The graphene layers 20b and 20c may be grown on the surface of the metal conductor with high-density multilayer graphene by the formation of the catalytic metal layer 21a for graphene growth, but the present invention is not limited thereto. Conductivity, and the value of the oxygen shielding effect depending on the thickness of the graphene layers 20b and 20c. Therefore, the thickness of the graphene layer can be adjusted to a required thickness.

Generally, a method of increasing the number of windings of a coil-shaped conductor wound to increase the output of the motor or changing the source material of the conductor can be used. However, if the number of windings of the conductor increases, the size of the motor increases, so that there is a problem that the demand for increasing the output while maintaining the size of the motor is insufficient. Therefore, it is considered to increase the output while maintaining the size of the motor by changing the raw material. In general, however, it is not efficient to select a raw material other than copper in terms of price and electrical conductivity as a raw material of a lead wire.

According to one embodiment, the graphene layer may be formed on the surface of the copper wire while maintaining the original material of the copper to maintain or reduce the width of the coil-shaped wire, thereby improving the output of the motor.

Specifically, the output can be improved while maintaining the motor size by stacking the graphene layers 20b and 20c and the insulating layers 20c and 21c on the conductor S. For example, the thickness of the graphene layers 20b, 20c and the width of the conductor can be determined so as to have the electric conductivity having the output so as to have the required output while maintaining the motor size. The insulating layers 20c and 21c are laminated on the graphene layers 20b and 20c to prevent the graphene layers 20b and 20c from being damaged so that the graphene layers 20b and 20c can be maintained for a long time, The insulating property between the conductor (S) and the conductor (S) can be secured.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

10: wire coating apparatus 100: wire feed unit 110: wire feed roll
The present invention relates to an image forming apparatus, and more particularly, it relates to an image forming apparatus, and more particularly, to an image forming apparatus, 340: Lamination guide roller 350: Lamination part
351: drying unit 360: recovery unit
361: Recovery guide roller 363: Collection roller 370: Second sensor
380: coating chamber 400:

Claims (10)

A wire feeding unit for feeding a wire;
A graphen forming unit for forming a graphene layer on a lead wire from the lead wire feeding unit; And
And a coating unit for laminating an insulating layer on a conductor on which the graphen layer is formed, The method according to claim 1,
The wire feeding unit includes:
A wire feed roll on which the wire is wound;
A wire guide roller for guiding the movement of the wire unwound from the wire feed roll; And
And a wire feed roller for feeding the wire. The method according to claim 1,
The conductor may be at least one of Ni, Co, Fe, Pt, Au, Al, Cr, Cu, Mg, Mn, Mo, Rh, Si, Ta, Ti, W, U, V, Zr, brass, , White brass, stainless steel, Ge, and combinations thereof. ≪ Desc / Clms Page number 13 > The method according to claim 1,
The lead comprises a core; And
And a catalyst metal layer disposed to surround an outer surface of the core. The method according to claim 1,
The catalyst metal layer may be formed of one of copper (Cu), nickel (Ni), cobalt (Co), titanium (Ti), platinum (Pt), zirconium (Zr), vanadium (V), rhodium (Rh) Lead wire coating equipment. The method according to claim 1,
The graphene forming unit comprises:
A conductive coating device for forming a graphene layer by injecting a reaction gas containing a carbon source and synthesizing graphene on the surface of the conductive wire by chemical vapor deposition. The method according to claim 1,
The coating unit comprises:
A coating chamber installed to be connected to the outlet of the graphene forming unit;
A lamination part for laminating an insulating material on the conductor on which the graphene layer is formed; And
And a weight portion for delaying the entry of the graphene layer transferred from the graphen forming unit into the lamination portion of the conductor on which the graphen layer is formed. The method according to claim 1,
The coating unit
And a collecting unit for collecting the conductor on which the insulating layer is stacked. Withdrawing the metal wire from the winding;
A synthesis step of synthesizing graphene on the surface of the lead wire to form a graphene layer;
A coating step of laminating and coating an insulating material on the metal conductor on which the graphene layer is formed; And
And a winding step of winding the coated metal lead wire. 10. The method of claim 9,
Wherein the synthesis step comprises injecting a reaction gas containing a carbon source to form a graphene layer on the surface of the conductive line by chemical vapor deposition.

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