KR101877807B1 - Method for manufacturing string for strengthening the anisotropy of its string surface and string products manufactured by using the same - Google Patents

Abstract

Disclosed is a method for manufacturing a string for anisotropic strengthening of a string surface and a high-strength string product manufactured using the method. A method for manufacturing a string for anisotropic strengthening of a string surface according to an embodiment of the present invention includes the steps of aligning the reinforcement material on the substrate, placing the string on the aligned reinforcement material, Irradiating the transmissive welding light to the reinforcing material, and terminating the irradiation of the welding light to the reinforcing material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a string for anisotropic strengthening of a surface of a string, and a high-strength string product manufactured using the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a method for manufacturing a string for anisotropic strengthening of the surface of a string and a high-strength string product manufactured using the method.

In general, polymer strings can be made of various polymer materials. The products using these strings are not only applied to everyday life such as rope or fabric, but also used in various manufacturing industries, sports industry, military technology, , And the aviation industry.

In recent years, in order to improve the strength of the polymer string, improvements are being made in the development of new polymer materials, synthesis techniques of the materials, composite fabrication techniques of existing polymers, and microstructure joining techniques.

However, the development of new polymer materials is technically very difficult and slow to develop. In addition, in the case of a twisted string technique, it is difficult to reach a technologically mature stage and to exceed the limit. In addition, although the technology for the production of a composite is still under development, unlike a planar polymer board, it is still a technical problem to apply an anisotropic (anisotropic) composite having a rigidity to a twist by applying a polymer material to the string . Therefore, it is difficult to maximize the merit of the composite in the case of a string which is subjected to twisting, not longitudinal stretching of the string.

Related technologies are disclosed in Korean Patent Laid-Open Publication No. 10-2008-0009043 (published on Apr. 24, 2008), nanofiber ribbons, sheet and twist and non-twist nano fiber spun yarns.

The embodiments of the present invention are applicable to an anisotropic (non-isotropic) method of a string surface which can realize a string product having rigidity (anisotropy having rigidity with tensile stress in various directions) against tensile stress due to twist as well as rigidity against longitudinal tensile stress And to provide a high strength string product manufactured using the same.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: aligning a reinforcing material on a substrate; Disposing a string on the aligned reinforcing material; Pressing the string; Irradiating the reinforcing material with welding light that can transmit the substrate; There is provided a method of manufacturing a string for anisotropic strengthening of a string surface, comprising terminating the irradiation of the welding light to the reinforcing material.

A method of manufacturing a string for anisotropic strengthening of a string surface comprises rotating a string on a substrate; And repeating the step of pressing the string, the step of irradiating the welding light to the reinforcing material, and the step of terminating the irradiation of the welding light, after the step of rotating the string.

A method of manufacturing a string for anisotropic strengthening of a string surface includes moving a substrate; And after the step of moving the substrate, repeating the step of pressing the string, the step of irradiating the welding light to the reinforcing material, and the step of finishing the irradiation of the welding light in sequence.

In the step of arranging the string on the reinforcing material, the string may be arranged diagonally with respect to the aligning direction of the reinforcing material.

The substrate is made of a transparent substrate, and the welding light may include light in a visible light wavelength range that can be absorbed by the reinforcing material.

According to another aspect of the present invention, there is provided an apparatus comprising: a columnar string; And a reinforcing material welded to the outer periphery of the string by light transmission welding using welding light, wherein the reinforcing material is welded in an oblique direction to the outer periphery of the string.

The reinforcing material has a wire form and may be composed of a plurality of reinforcing materials.

The string includes a thermoplastic polymer material that increases the surface bonding force by heat, and the reinforcing material may include a fiber of carbon component capable of absorbing the welding light to generate heat.

The reinforcing material may comprise a fiber having a nanoscale diameter.

The high strength string product can be used as a torsion spring in which the reinforcing material is welded in an oblique direction to the outer periphery of the string and then processed into a coil shape through plastic working.

High strength string products may include high strength string products used in robot driven twist motors.

High strength string products can be used as strings for twisted string actuators.

According to the embodiments of the present invention, by welding the reinforcement material in the oblique direction on the surface of the string, it is possible to improve rigidity not only in the longitudinal direction tensile stress but also in the tensile stress due to twist (anisotropy ). ≪ / RTI >

FIG. 1 is a diagram showing a high-strength string product manufactured using a string manufacturing method according to an embodiment of the present invention.
FIG. 2 is a graph comparing the case where tensile stress due to twisting in a diagonal direction is applied to a conventional string and the case where a tensile stress due to twisting in an oblique direction is applied to a string product manufactured by a manufacturing method according to an embodiment of the present invention Fig.
3 is a flowchart illustrating a method of manufacturing a string for anisotropic strengthening of a surface of a string according to an embodiment of the present invention.
4 is a view illustrating a process of arranging a string on a reinforcing material aligned in one direction with the reinforcing material aligned in one direction on a substrate.
FIG. 5 is a view illustrating a process of pressing a string in a state where the string is disposed on the reinforcing material to enlarge the surface area between the string and the reinforcing material, and then irradiating the welding light to induce heat generation of the reinforcing material.
FIG. 6 is a view illustrating a process for repeating the processes described in FIG. 5 after the string is moved in the horizontal direction in a state where irradiation of the welding light to the reinforcing material is terminated.
7 is a flowchart illustrating a method of manufacturing a string for anisotropic strengthening of a surface of a string according to another embodiment of the present invention.
8 is a view showing a process of arranging a string on a reinforcing material aligned in one direction with the reinforcing material aligned in one direction on a substrate.
FIG. 9 is a view showing a process of inducing heat generation of reinforcing material by irradiating the welding light after pressing the string in a state where the string is disposed on the reinforcing material to enlarge the surface area between the string and the reinforcing material.
FIG. 10 is a view showing a process for repeating the processes described in FIG. 9 after moving the substrate in the horizontal direction in a state where irradiation of the welding light to the reinforcing material is terminated.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, the term " coupled " is used not only in the case of direct physical contact between the respective constituent elements in the contact relation between the constituent elements, but also means that other constituent elements are interposed between the constituent elements, Use them as a concept to cover each contact.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, a method of manufacturing a string for anisotropic strengthening of a surface of a string according to the present invention and a preferred embodiment of a high-strength string product manufactured using the same will be described in detail with reference to the accompanying drawings, , The same or corresponding components are denoted by the same reference numerals, and redundant description thereof will be omitted.

FIG. 1 is a diagram showing a high-strength string product manufactured using a string manufacturing method according to an embodiment of the present invention.

Referring to FIG. 1, a high-strength string product 100 manufactured using a string manufacturing method according to an embodiment of the present invention includes a columnar string 110 and a string (not shown) by light- 110) welded in an oblique direction to the outer periphery of the reinforcing material (120).

The reinforcement material 120 may be composed of fine fibers having a diameter of nanoscale and may be formed to have an arbitrary angle? In the diagonal direction with respect to the axial direction (longitudinal direction) of the string 110 at the outer periphery of the string 110 Respectively.

The angle θ can be +45 degrees or -45 degrees depending on the principal stress direction due to twisting.

According to this embodiment, the string 110 may be made of a thermoplastic polymer material having a high surface bonding force by heat. Since the string 110 is made of a material having a high surface bonding force by heat, the reinforcing material 120 can well absorb the heat generated by absorbing the welding light, thereby helping increase the surface bonding force with the reinforcing material 120 You can give.

The reinforcing material 120 may be made of a material having a fine diameter and serves as a reinforcing material for enhancing the strength against tensile stress applied to the surface of the string 110 by torsion.

According to this embodiment, the reinforcement material 120 should be made of a material capable of absorbing light within a specific wavelength range, such as welding light, as well as acting as a reinforcement material resistant to tensile force. To this end, the micro-reinforcement material 120 may be composed of a fiber of carbon component capable of absorbing welding light and generating heat.

Therefore, by irradiating the reinforcing material 120 with welding light in a specific wavelength range where the reinforcing material 120 can be absorbed in a state where the reinforcing material 120 is in contact with the outer circumference of the string 110, The reinforcing material 120 absorbs light to generate heat (generates heat), and the generated heat is transmitted to the surface of the string 110 in contact with the reinforcing material 120, The bonding force can be improved. As a result, the surface bonding force between the reinforcement material 120 and the string 110 is higher than the surface bonding force between the substrate 10 and the reinforcement material 120, so that when the string 110 cools down, It is possible to maintain a state in which it is completely fixed to the surface of the substrate 110.

As shown in FIG. 1, the reinforcing material 120 may have a wire shape, and a plurality of the reinforcing materials 120 may be continuously or discontinuously wound around the outer circumference of the string 110 in an oblique direction.

Although FIG. 1 shows a case where at least one reinforcing material 120 is arranged only in an oblique direction at a specific angle on the outer periphery of the string 110, the present invention is not necessarily limited to this, 120 may be arranged to cross each other at the outer periphery of the string 110 in oblique directions at various angles.

For reference, in the present invention, as a method for allowing the wire-like reinforcing material 120 to be more easily attached to the outer periphery of the string 110 in an oblique direction, a transmission welding method using welding light such as laser- Respectively.

FIG. 2 illustrates a case where a tensile stress due to twisting in a diagonal direction is applied to a conventional string, and a case where a tensile stress due to twisting in an oblique direction is applied to a high-strength string product manufactured using a manufacturing method according to an embodiment of the present invention FIG.

Referring to FIG. 2, in the case of the conventional type string shown on the left side, a force acting in the rotational direction at both ends of the string is opposite to each other (see arrows) (Tiny cracks) occur in the string when the tensile force acting in the diagonal direction of the string is excessive, resulting in a great problem in the stability of the article to which the string is applied.

However, in the case of the string product 100 manufactured using the manufacturing method according to an embodiment of the present invention, since a plurality of reinforcement materials 120 are welded in an oblique direction to the outer circumference of the string 110, The occurrence of cracks can be delayed even if the tensile force acting in the oblique direction of the string is excessive, and as a result, the case where the string 110 is ruptured can be minimized, and high stability can be imparted to the quality of the product.

For reference, the high-strength string product manufactured by the method for manufacturing the string for anisotropic strengthening of the surface of the string according to an embodiment of the present invention is further processed into a coil shape through plastic forming after the manufacturing process to be described later, It can be used as a torsion spring used.

In addition, the above-described high-strength string product can be used as a high-strength string product used in a twist motor for driving a robot. In this case, the high-strength string product 100 shown in FIG. 1 can be manufactured in such a way that a plurality of strands are twisted like a rope, and the high-strength string product thus produced has tensile stress acting in an oblique direction on the surface, It can be used as a means for transmitting the power of the twist motor.

In addition, the high strength string products described above can be used as strings for use in twisted string actuators.

In addition, since the high strength string product according to the embodiment of the present invention has a very high strength against tensile stress generated by twisting, it can be applied to a wire product in which such tensile stress frequently occurs.

Hereinafter, various embodiments of the string manufacturing method for manufacturing the high-strength string product will be described in more detail.

3 is a flowchart schematically illustrating a method of manufacturing a string for anisotropic strengthening of a surface of a string according to an embodiment of the present invention. FIG. 4 is a view showing a process of arranging a string on a reinforcement material aligned in one direction with the reinforcement material aligned in one direction on a substrate, FIG. 5 is a view showing a state in which the string is pressed FIG. 6 is a view showing a process of inducing heat generation of a reinforcing material by irradiating a welding light after enlarging the surface area between the string and the reinforcing material. FIG. FIG. 5 is a flowchart illustrating a process for repeating the processes illustrated in FIG.

Referring to FIG. 3, a method of manufacturing a string for anisotropic strengthening of a string surface according to an embodiment of the present invention includes: (S10) aligning a reinforcement material 120 on a substrate 10 in one direction; Placing (S20) the string (110) on the reinforcing material (120) aligned in one direction; Pressing the string 110 (S30); (S40) irradiating the reinforcing material (120) with the welding light (21) transmittable through the substrate (10); And terminating the irradiation of the welding light 21 to the reinforcing material 120 (S50).

According to this embodiment, a method of manufacturing a string for anisotropic strengthening of a string surface includes the steps of: (S60) rotating the string 110 horizontally on the substrate 10 in addition to the above-described steps; (S30) of pressing the string (S30) after the step of rotating the string (S60), irradiating the reinforcing material with the welding light (S40), and terminating the irradiation of the welding light (S50) (Step S70).

As shown in FIG. 4, after a plurality of reinforcing materials 120 are arranged on the substrate 10, the reinforcing materials 120 are oriented in one direction (in the same direction or in an arbitrary angle?) Through a reinforcing material aligning process (not shown) (S10). In this case, the one direction refers to a diagonal direction having an arbitrary angle of θ with respect to the axial direction (longitudinal direction) of the string 110.

The reinforcing material aligning process (not shown) for aligning the plurality of reinforcing materials 120 in one direction can be implemented by using, for example, a fluid flow sorting method or a sliding friction force sorting method. A detailed description thereof will be omitted here.

For reference, reinforcing material 120 having high strength and flexibility such as carbon fiber or carbon nanotube can be used as reinforcement material 120 applied to the present embodiment. For example, a reinforcing fiber having a diameter of a few nanometers to a few micrometers, or a reinforcing material in the form of a band, such as a graphene ribbon, may be used. As another example, reinforcing fibers of a carbon component excellent in thermal bonding strength with the polymer can be used as the reinforcement material 120.

Next, as shown in FIG. 4, the string 110 can be placed on the reinforcement material 120 in a state where all of the reinforcement materials 120 are aligned in one direction (S20). At this time, the arrangement angle between the string 110 and the reinforcing material 120 is arranged to have an arbitrary angle of θ, so that the string 110 can be arranged in an oblique direction with respect to the alignment direction of the reinforcing material 120.

Next, as shown in FIG. 5, the string 110 placed on the reinforcement material 120 may be pressed toward the substrate 10 (S30). It is possible to increase the contact surface area between the string 110 and the reinforcing material 120 through the pressing process so that the reinforcing material 120 (i.e., the reinforcing material 120) is increased in proportion to the increased contact surface area when the reinforcing material 120 is heated by the welding light 21. [ ) And the string 110 can be improved.

For reference, a thermoplastic polymer material having a high surface bonding strength by heat may be used as the string 110, for example, Dyneema, Vectran, polyethylene terephthalate, polycarbonate, and acryl. The size of the string 110 used in the present embodiment is not limited.

The pressing force to press the string 110 is such that the width of the contact surface between the string 110 and the reinforcement material 120 is less than the width of the width of the welded light on the weld surface, Lt; / RTI > For example, in the case of a polyethylene terephthalate string having a diameter of 1 mm and a length of 1 m, a pressing force of about 130 N is required for a contact width of about 100 μm.

5, the string 110 is pressed at a predetermined pressure, and at the bottom of the substrate 10, the welding light 21, which can be transmitted through the substrate 10, is irradiated toward the reinforcing material 120 (S40).

Welding light 21 may be a wavelength region of light that can be transmitted through substrate 10 and absorbed by reinforcing material 120 and may be irradiated at the bottom of substrate 10 toward reinforcing material 120 . For example, the substrate 10 may be a transparent glass substrate, and the reinforcing material 120 aligned on the glass substrate may be a carbon nanotube-type fiber, in which case the welding light 21 may be in the visible Light can be used.

The method of irradiating the welding light 21 may be a method of scanning a focused beam in the longitudinal direction of the string 110 or irradiating a linear beam. At this time, the welding light 21 may be formed by a laser light source 20, for example. In addition, the light source 20 forming the welding light 21 may be implemented through various lamps.

On the other hand, in order to minimize heat damage to the string 110, a light source 20 in the form of a continuous wave, as well as a pulsed light source 20 may be used.

When irradiating the welding light 21, the welding light 21 absorbed by the reinforcing material 120 may be converted into heat and transmitted to the string 110. That is, in the light transmission welding using the welding light, the welding light 21 is transmitted through the substrate 10 and irradiated to the reinforcing material 120 attached on the substrate 10, The light energy accumulated on the portion heats and melts the contact portion, and the string 110 touching the contact portion is also heated and melted through heat transfer. Through this process, the fine reinforcement material 120 can be easily joined to the outer periphery of the string 110 in an oblique direction.

At this time, the temperature of the contact surface between the string 110 and the reinforcement material 120 increases above the glass transition temperature of the string 110, so that the surface bonding force between the reinforcement material 120 and the substrate 10 becomes higher than the string transition temperature 110 - reinforcing material 120. [0034]

In contrast, when the string 110 is heated to a temperature higher than the glass transition temperature, wetting of the string 110 increases the micro-contact surface between the string-reinforced materials, The surface bonding force (bonding force) between the two objects is greatly increased. The surface bonding force between the string 110 and the reinforcing material 120 thus induced becomes greater than the surface bonding force of the reinforcing material 120 and the substrate 10 before light irradiation. Therefore, when the string 110 is separated from the substrate 10 after the light irradiation, the reinforcing material 120 attached to the existing substrate 10 is separated from the substrate 10 and transferred to the string 110 .

In this embodiment, the substrate 10 is utilized to weld the reinforcing material 120 in an oblique direction to the outer periphery of the string 110. The nano-sized reinforcement material 120 having a fine diameter is used as the reinforcing material 120, As a base for aligning the strap 110 in one direction at a time and also serves as a support when pushing the string 110 on the reinforcement material 120 and also acts as a reinforcement material located under the string 110 in light- And can also function as a transparent plate for irradiating welding light to the substrate 120.

Next, when the surface bonding force between the reinforcing material 120 and the substrate 10 is induced by the surface bonding force between the string 110 and the reinforcing material 120, the contact surface temperature between the string 110 and the reinforcing material 120 is lowered Irradiation of the welding light 21 to the reinforcing material 120 can be terminated (S50).

The contact surface temperature between the string 110 and the reinforcement material 120 is lowered as the irradiation of the welding light 21 is terminated and the surface bonding force between the string 110 and the reinforcement material 120 The reinforcing material 120 is transferred from the surface of the substrate 10 to the surface of the string 110 when the string 110 is rotated in a process to be described later from the surface of the substrate 110 It can be separated naturally.

As described above, according to the present embodiment, rod-like reinforcing material 120 wound in an oblique direction on the outer periphery of the string 110 is welded in a minimum process through light welding such as laser transmission welding while pressurizing the rod- .

In addition to the above-described steps, in the present embodiment, a step S60 of rotating the string 110 in the horizontal direction on the substrate 10; A step S30 of pressing the string 110 and a step S40 of irradiating the welding material 21 to the reinforcing material 120 after the step S60 of rotating the string 110, (Step S70) of repeating the step of terminating the examination of the first to fourth embodiments (step S50).

This is because if it is technically somewhat difficult to press the bar reinforcing material 120 obliquely wound around the outer periphery of the string 110 at a uniform pressure and weld it in a single process through light welding, The reinforcing material 120 is welded to the circumferential direction of the circular object (i.e., the tangential direction of the circumference of the circular object) several times to stably fix the reinforcing material 120 on the surface of the string 110 .

Referring to FIG. 6, as one method for implementing such a process, in this embodiment, a substrate 10, a reinforcing material 120 attached to the upper surface of the substrate 10, The light source 20 positioned is rotated in the circumferential direction (from right to left with respect to the drawing) (S60) while only the string 110 located on the substrate 10 is rotated (S60) The reinforcing material 120 may be transferred more stably along the outer circumference of the string 110 through the step S70 of repeating the steps S30, S40 and S50.

In the foregoing, a method of manufacturing a string for anisotropic strengthening of a surface of a string according to an embodiment of the present invention has been described. Hereinafter, a method of manufacturing a string for anisotropic strengthening of a surface of a string according to another embodiment of the present invention will be described.

7 to 10, in the same manner as the method of manufacturing a string for anisotropic strengthening of a surface of a string according to another embodiment of the present invention, overlapping portions are not described in detail And processes (S60 ', S70') that can replace the steps (S60, S70) of the above-described embodiment will be mainly described.

7 is a flowchart illustrating a method of manufacturing a string for anisotropic strengthening of a surface of a string according to another embodiment of the present invention. 8 is a view showing a process of arranging a string on a reinforcement material aligned in one direction with the reinforcement material aligned in one direction on a substrate, FIG. 9 is a view showing a process of pressing the string in a state where the string is disposed on the reinforcement material FIG. 10 is a view illustrating a process of inducing heat generation of a reinforcing material by irradiating a welding light after enlarging the surface area between the string and the reinforcing material. And then repeating the processes described with reference to FIG. 9.

Referring to FIG. 7, a method of manufacturing a string for anisotropic strengthening of a surface of a string according to another embodiment of the present invention includes: (S10) aligning a reinforcement material 120 on a substrate 10; Placing (S20) the string (110) on the aligned reinforcement material (120); Pressing the string 110 (S30); (S40) irradiating the reinforcing material (120) with the welding light (21) transmittable through the substrate (10); And terminating the irradiation of the welding light 21 to the reinforcing material 120 (S50).

According to this embodiment, a method of manufacturing a string for anisotropic strengthening of a string surface includes steps S60 'of moving the substrate 10 in addition to the above-described steps; (S30) of pressing the string (S30) after the step of moving the substrate (S60 '), irradiating the reinforcing material with the welding light (S40), and terminating the irradiation of the welding light (Step S70 ').

In describing the present embodiment, the processes (S10 to S50) shown in FIGS. 7 to 9 are substantially the same as or corresponding to the processes (S10 to S50) described in the above-described embodiment, and thus a detailed description thereof will be omitted.

10, a reinforcing material 120 attached to the upper surface of the substrate 10, a string 110 mounted on the reinforcing material 120, and a light source (not shown) (S60 ') while slightly moving the substrate 10 only in the circumferential direction (in this case, left to right or in the horizontal direction with reference to the drawing) while all of the steps A process of transferring the reinforcing material 120 more stably along the outer circumference of the string 110 can be realized through the step S70 'of sequentially repeating the steps S30, S40 and S50.

As described above, according to the method for manufacturing the string for anisotropic strengthening of the surface of the string according to the embodiment of the present invention, by welding the reinforcing material in the oblique direction on the surface of the string, not only the rigidity against the tensile stress in the longitudinal direction, It is possible to produce a high-strength string product having superior rigidity (anisotropy having tensile strength in various directions) even in tensile stress, and it is also advantageous in that it is easy to manufacture and can increase the mass production yield.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

10: substrate 20: light source
21: Welding light 100: High strength string products
110: string 120: reinforcement material

Claims (12)

Aligning the wire-shaped reinforcement material on the substrate;
Disposing a columnar string on the aligned reinforcing material;
Pressing the string;
Irradiating the substrate with a penetrable welding light from the bottom of the substrate toward the reinforcing material;
Terminating the irradiation of the welding light with respect to the reinforcing material;
Moving the substrate relative to the string; And
Sequentially pressing the string, applying the welding light to the reinforcing material, and terminating the irradiation of the welding light, after the step of moving the substrate;
/ RTI >
Wherein arranging the string on the aligned reinforcing material places the string in an oblique direction with respect to an alignment direction of the reinforcing material,
Wherein the string comprises a thermoplastic polymer material having a high surface bonding force by heat,
Wherein the reinforcing material comprises a fiber of a carbon component capable of absorbing the welding light to generate heat. ≪ RTI ID = 0.0 > 15. < / RTI >
Aligning the wire-shaped reinforcement material on the substrate;
Disposing a columnar string on the aligned reinforcing material;
Pressing the string;
Irradiating the substrate with a penetrable welding light from the bottom of the substrate toward the reinforcing material;
Terminating the irradiation of the welding light with respect to the reinforcing material;
Rotating the string on the substrate; And
Repeating the step of pressing the string, the step of irradiating the reinforcing material with the welding light, and the step of finishing the irradiation of the welding light, after the step of rotating the string;
/ RTI >
Wherein arranging the string on the aligned reinforcing material places the string in an oblique direction with respect to an alignment direction of the reinforcing material,
Wherein the string comprises a thermoplastic polymer material having a high surface bonding force by heat,
Wherein the reinforcing material comprises a fiber of a carbon component capable of absorbing the welding light to generate heat. ≪ RTI ID = 0.0 > 15. < / RTI >
delete delete The method according to claim 1,
Wherein the substrate is made of a transparent substrate,
Wherein the welding light includes light in a visible light wavelength range that can be absorbed by the reinforcing material.
Columnar string; And
A reinforcing material welded to the outer periphery of the string by light transmission welding using welding light;
≪ / RTI >
The reinforcement material is welded in an oblique direction to the outer periphery of the string,
Characterized in that the high strength string product is manufactured using a string manufacturing method for anisotropic strengthening of the string surface according to the above item 1 or 2.
The method according to claim 6,
Wherein the reinforcing material can be composed of a plurality of reinforcing materials.
delete The method according to claim 6,
Wherein the reinforcing material comprises a fiber having a nanoscale diameter.
The method according to claim 6,
Wherein the high strength string product is used as a torsion spring in which the reinforcing material is welded in an oblique direction to the outer periphery of the string and then processed into a coil shape through plastic forming.
The method according to claim 6,
Wherein the high strength string product comprises a high strength string product used in a twist motor for driving a robot.
The method according to claim 6,
Characterized in that the high strength string product is used as a string for use in a twisted string actuator.

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