KR102668990B1 - How to Make GFRP Reinforcements for High Strength - Google Patents

Abstract

The present invention relates to a method of manufacturing high-strength GFRP reinforcing bar, which improves the structure so that the reinforcing yarn is spirally wound around the outer peripheral surface of the core fiber to form a space between the reinforcing yarn and the core fiber, thereby forming a fiber-reinforced composite reinforcing bar made of core fiber and reinforcing yarn into concrete. When applied as a reinforcing bar in a structure, the poured concrete fills the space and maintains its integrity with the fiber-reinforced composite reinforcing bar, so it is impregnated to improve durability and safety when the concrete structure vibrates due to an earthquake, impact load, or dynamic load. The main components include step (S10), winding step (S20), curing step (S30), cooling step (S40), and cutting step (S50).

Description

How to make GFRP Reinforcements for High Strength}

The present invention relates to a method of manufacturing high-strength GFRP reinforcing bar, and more specifically, the structure is improved so that the reinforcing yarn is wound spirally around the outer peripheral surface of the core fiber to form a space between the reinforcing yarn and the core fiber, and a fiber-reinforced composite composed of the core fiber and the reinforcing yarn. When applying reinforcing bars as reinforcing bars in a concrete structure, the poured concrete fills the space and maintains unity with the fiber-reinforced composite reinforcing bars, thereby improving durability and safety when the concrete structure vibrates due to earthquakes, impact loads, or dynamic loads. This relates to a method of manufacturing high-strength GFRP reinforcement.

Typically, concrete structures are used as rebar by planting rebar inside, but the rebar is subject to serious corrosion due to the influence of various environmental factors, such as snow removal materials or seawater environment.

To replace these rebars, reinforcing bars made of fiber-reinforced composite materials are used. Here, fiber-reinforced composite materials not only have excellent corrosion resistance, heat resistance, and corrosion resistance, but also have very high strength, so they are applied across all industrial fields. Although it is a semi-permanent new material whose field is expanding, most reinforcing bars made of fiber-reinforced composite materials are manufactured in the shape of bars, so they are more easily damaged than reinforcing bars when vibrations occur in buildings due to earthquakes, impact loads, or dynamic loads.

Accordingly, in the previously disclosed Patent No. 10-2156158, a resin impregnation unit formed to unwrap the roving fibers into a bundle from a plurality of single eld rovings wound with composite reinforcing bar roving fibers and impregnate them; a reinforcing bar rod processing unit formed to input the roving fiber bundles impregnated into the resin impregnation unit together, and pultruding the roving fiber bundles to process them into reinforcing bar rods; A winding unit that forms ribs by spirally winding rib fibers around the outer peripheral surface of the reinforcement rod discharged from the reinforcement rod processing unit; a hardening portion that promotes a hardening reaction by applying heat to the reinforcing bar rod on which the rib is formed; And a caterpillar portion formed to continuously pull the reinforcing rod discharged from the winding portion and the hardening portion rearward; a cooling portion that cools the reinforcing rod that has passed through the hardening portion; And a cutting part that cuts the reinforcing bar rod along a set length at the rear of the caterpillar part, wherein the caterpillar part includes: a lower caterpillar that rotates while supporting the reinforcing bar rod that has passed through the cooling part; an upper caterpillar that continuously rotates in a direction opposite to the lower caterpillar and presses the reinforcing bar rod together with the lower caterpillar to move it toward the cutting unit; And an elastic member is coupled to the outer peripheral surface of the lower caterpillar and the upper caterpillar, respectively, and is provided to directly contact the moving reinforcing bar rod. A technology including a has been previously proposed.

However, the above-described prior art seeks to achieve lightweight and high rigidity while manufacturing fiber-reinforced rebar for concrete with excellent corrosion resistance and durability. However, the integrity is still not maintained between concrete and fiber-reinforced rebar due to low bonding strength, resulting in earthquakes. When exposed to shock loads, or dynamic loads, problems leading to defects in the concrete structure followed.

KR 10-2156158 B1 (2020.09.09.)

Accordingly, the present invention was conceived to solve the above problems, and the structure is improved so that the reinforcing yarn is wound spirally around the outer peripheral surface of the core fiber to form a space between the reinforcing yarn and the core fiber, so that the fiber-reinforced composite reinforcement bar composed of the core fiber and the reinforcing yarn When applied as a reinforcing bar in a concrete structure, the poured concrete fills the space and maintains its integrity with the fiber-reinforced composite reinforcing bar, thereby improving durability and safety when the concrete structure vibrates due to an earthquake, impact load, or dynamic load. The purpose is to provide a method of manufacturing high-strength GFRP reinforcement.

In order to achieve this purpose, a feature of the present invention is to transfer multiple strands of core fibers (10) formed of one or more of glass fibers, aramid fibers, carbon fibers, basalt fibers, PVA fibers, and high-strength polyester fibers in a bundle. An impregnation step (S10) of impregnating and drawing a thermosetting epoxy resin while doing so; While drawing the bundle of core fibers (10) impregnated with the thermosetting epoxy resin, reinforcing yarn (20) formed of one or more of glass fiber, aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber is spirally formed on the outer peripheral surface. A winding step (S20) of forming a concavo-convex band (21) by winding; A curing step (S30) of curing the thermosetting epoxy resin by heating the core fiber 10 on which the uneven band 21 is formed through the winding step (S20) to a predetermined temperature; A cooling step (S40) of cooling the core fibers (10) that have passed the curing step (S30) by putting them into a water tank (400) storing cooling water; And a cutting step (S50) of cutting the core fiber 10 that has passed the cooling step (S40) to a set length.

At this time, the winding step (S20) is provided to spirally wind the reinforcing yarn 20 by the winding unit 200, and the winding unit 200 is formed into a predetermined cross-sectional shape while passing a bundle of core fibers. A first drive is installed so that the die 210 to be pultruded and the first bobbin 221, which is inserted into the outer peripheral surface of the die 210 and rotated by the drive module 260 and on which the first reinforcing yarn 20a is wound, are installed. A first driving wheel 220 equipped with an arm 222, a first withdrawal guide 230 that guides the withdrawal position of the first reinforcing yarn 20a wound on the first bobbin 221, and a first drive The second driving arm 242 is inserted into the outer peripheral surface of the wheel 220 and rotated by the driving module 260, and the second driving arm 242 is installed on the second driving wheel so that the second bobbin 241 on which the second reinforcing yarn 20b is wound is installed. (240) and a second pull-out guide 250 that guides the pull-out position of the second reinforcing yarn (20b) wound on the second drive wheel 240, and the first and second drive wheels 220 ( 240) is characterized in that it is provided to spirally wind the first and second reinforcing yarns 20a and 20b around the outer peripheral surface of the core fiber 10 while rotating around the die 210.

In addition, the drive module 260 is installed on the first and second drive gears 261 and 262 and the first drive wheel 220, which are arranged on the same axis and operate in conjunction with the motor (M), and operate at idle speed. A first driven gear 264 that engages with the first driving gear 261 through a gear 263 and rotates is installed on the second driving wheel 240, and engages with the second driving gear 262 to rotate the first driven gear 264. It is characterized by including a first driven gear (264) and a second driven gear (265) rotating in the opposite direction.

In addition, the first and second driving wheels 220 and 240 are provided to rotate in opposite directions to each other by the drive module 260, and the first and second driving wheels 220 and 240 rotate in opposite directions to each other. After the first reinforcing yarn (20a) drawn from the first bobbin 221 is wound in a spiral manner, the second reinforcing yarn (20b) drawn from the second bobbin 241 is wound on the outer peripheral surface of the first reinforcing yarn (20b). is spirally wound in the reverse direction, and the second reinforcing yarn (20b) is spaced apart from the outer peripheral surface of the core fiber (10) by the first reinforcing yarn (20a) to form a space 30, thereby forming a space between the core fiber (10) and the first reinforcing yarn (20a). , When applying a fiber-reinforced composite rebar consisting of 2 reinforcing threads (20a) (20b) as a rebar of a concrete structure, the concrete is filled into the space 30 to maintain unity with the fiber-reinforced composite rebar. do.

In addition, the gear ratio of the second drive gear 262 and the second driven gear 265 compared to the rotation speed of the first drive wheel 220 due to the gear ratio of the first drive gear 261 and the first driven gear 264 The rotation speed of the second driving wheel 240 is provided to rotate at a reduced rate, and the second driving wheel 240 rotates at a reduced rate compared to the first driving wheel 220, so that the second driving wheel 240 rotates at a reduced speed compared to the first reinforcing thread 20a. It is characterized in that the spiral pitch of the reinforcing yarn (20b) is formed to be expanded.

In addition, the second bobbins 241 are arranged in plural numbers spaced apart in the longitudinal direction of the core fiber 10, so that a plurality of strands of the second reinforcing yarn 20b are wound in double rows on the outer peripheral surface of the first reinforcing yarn 20a. It is characterized by

In addition, the first bobbin 221 and the first withdrawal guide 230 are provided to reciprocate linearly in the longitudinal direction of the core fiber 10 by a cam module 270, and the cam module 270 is configured to It is installed on the drive wheel 220 and is conveyed linearly in the longitudinal direction of the core fiber 10, and the conveying force is applied in the opposite direction to the conveying direction of the core fiber 10 by the elastic body, and the first bobbin 221 and the second bobbin are at one end. 1. A cam rod 271 on which the withdrawal guide 230 is installed, and a cam 272 installed on the other end of the cam rod 271 and pressing the cam rod 271 while performing a cam movement with the second driving arm 242. Included, while the first and second drive wheels 220 and 240 rotate in opposite directions to each other, the cam 272 performs the second drive at the point where the cam rod 271 intersects the second drive arm 242. When the arm 242 is pressed, the cam rod 271 is moved straight in the direction of transport of the core fiber 10 and changes the position of the first pull-out guide 230, and the first pull-out guide 230 is pulled out. When the spiral winding pitch of the reinforcing yarn 20a is reduced and the cam rod 271 leaves the section where it intersects the second driving arm 242, the pressing force on the cam 272 by the second driving arm 242 is When the cam rod 271 is released and returned and transported in the direction opposite to the direction of transport of the core fiber 10, the spiral winding pitch of the first reinforcing yarn 20a drawn out through the first withdrawal guide 230 is provided to expand. , It is characterized in that the size of the space 30 is reduced and expanded by reducing and expanding the pitch of the first reinforcing yarn 20a by the cam module 270.

According to the above configuration and operation, the present invention has been improved in structure so that the reinforcing yarn is wound spirally around the outer peripheral surface of the core fiber to form a space between the reinforcing yarn and the core fiber, and the fiber-reinforced composite reinforcing bar consisting of the core fiber and the reinforcing yarn is used as a reinforcing bar in the concrete structure. When applied, the poured concrete fills the space and maintains its integrity with the fiber-reinforced composite reinforcement bars, which has the effect of improving durability and safety when the concrete structure vibrates due to earthquakes, impact loads, or dynamic loads.

Figure 1 is an overall configuration diagram showing a method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention.
Figure 2 is a configuration diagram showing the winding part of the method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention from the front.
Figure 3 is a configuration diagram showing the winding portion of the method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention from the side.
Figure 4 is a configuration diagram showing a modified example of the winding part of the method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention.
Figure 5 is a configuration diagram showing the cam module of the method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention.
Figure 6 is a configuration diagram showing the operating state of the cam module of the method for manufacturing high-strength GFRP reinforcement according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Also, in describing the present invention, if it is determined that related known functions may unnecessarily obscure the gist of the present invention as they are obvious to those skilled in the art, the detailed description thereof will be omitted.

Figure 1 is an overall configuration diagram showing a method for manufacturing a high-strength GFRP reinforcement bar according to an embodiment of the present invention, and Figure 2 is a diagram showing the winding portion of the method for manufacturing a high-strength GFRP reinforcement bar from the front according to an embodiment of the present invention. , Figure 3 is a configuration diagram showing the winding part of the method for manufacturing high-strength GFRP reinforcement bar from the side according to an embodiment of the present invention, and Figure 4 is a modified example of the winding part of the method for manufacturing high-strength GFRP reinforcement bar according to an embodiment of the present invention. is a configuration diagram showing a configuration diagram, and Figure 5 is a configuration diagram showing a cam module of a method of manufacturing a high-strength GFRP reinforcement bar according to an embodiment of the present invention, and Figure 6 is a diagram showing a cam module of a method of manufacturing a high-strength GFRP reinforcement bar according to an embodiment of the present invention. This is a configuration diagram showing the cam module operating status.

The present invention relates to a method of manufacturing high-strength GFRP reinforcing bar, which improves the structure so that the reinforcing yarn is spirally wound around the outer peripheral surface of the core fiber to form a space between the reinforcing yarn and the core fiber, thereby forming a fiber-reinforced composite reinforcing bar made of core fiber and reinforcing yarn into concrete. When applied as a reinforcing bar in a structure, the poured concrete fills the space and maintains its integrity with the fiber-reinforced composite reinforcing bar, so it is impregnated to improve durability and safety when the concrete structure vibrates due to an earthquake, impact load, or dynamic load. The main components include step (S10), winding step (S20), curing step (S30), cooling step (S40), and cutting step (S50).

1. Impregnation step (S10)

The impregnation step (S10) according to the present invention involves transporting a plurality of core fibers (10) formed of one or more of glass fiber, aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber in a bundle, and thermosetting. This is the step of impregnating and drawing into epoxy resin.

The core fiber 10 is installed on a bobbin tray while being wound around each bobbin, and the core fiber 10 drawn out to each bobbin is supplied in the form of a bundle through the transfer guide 100.

In addition, the core fiber 10 is impregnated with the thermosetting epoxy resin while passing through a storage tank containing the thermosetting epoxy resin, and then drawn into a predetermined cross-sectional shape through the die 210 to impregnate the core fiber 10. It is equipped to squeeze out some of the thermosetting epoxy resin.

2. Winding step (S20)

In the winding step (S20) according to the present invention, the bundle of core fibers 10 impregnated with thermosetting epoxy resin is drawn and at least one of glass fiber, aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber is added to the outer peripheral surface. This is the step of forming the uneven band 21 by winding the reinforcing yarn 20 formed in a spiral shape.

In FIG. 2, the winding step (S20) is provided to spirally wind the reinforcing yarn 20 by a winding unit 200, and the winding unit 200 allows a bundle of core fibers (1 bundle) to pass through a predetermined cross section. The die 210, which is pultruded into a shape, and the first bobbin 221, which is inserted into the outer peripheral surface of the die 210 and rotated by the drive module 260, and on which the first reinforcing yarn 20a is wound, are installed. A first driving wheel 220 equipped with a first driving arm 222, a first withdrawal guide 230 that guides the withdrawal position of the first reinforcing yarn 20a wound on the first bobbin 221, and a first The second drive arm 242 is inserted into the outer peripheral surface of the first drive wheel 220 and rotated by the drive module 260, and the second drive arm 242 is installed so that the second bobbin 241 on which the second reinforcing yarn 20b is wound is installed. It includes a drive wheel 240 and a second pull-out guide 250 that guides the pull-out position of the second reinforcing yarn 20b wound around the second drive wheel 240.

In addition, the first and second driving wheels 220 and 240 rotate around the die 210 to spirally wind the first and second reinforcing yarns 20a and 20b around the outer peripheral surface of the core fiber 10. It is provided.

At this time, the first and second driving wheels 220 and 240 rotate in the same direction at the same speed, rotate in the opposite direction at the same speed, rotate in the same direction at different speeds, or rotate in the opposite direction at the same speed. It is provided to rotate, and is provided to form various uneven rolls on the outer peripheral surface of the core fiber 10 using the first and second reinforcing yarns 20a and 20b.

Meanwhile, the first and second reinforcing threads 20a and 20b are organized to exhibit performance suitable for the construction environment by applying the same material and diameter or applying them differently.

In addition, the drive module 260 is installed on the first and second drive gears 261 and 262 and the first drive wheel 220, which are arranged on the same axis and operate in conjunction with the motor (M), and operate at idle speed. A first driven gear 264 that engages with the first driving gear 261 through a gear 263 and rotates is installed on the second driving wheel 240, and engages with the second driving gear 262 to rotate the first driven gear 264. It includes a first driven gear (264) and a second driven gear (265) that rotates in the reverse direction.

In addition, the first and second driving wheels 220 and 240 are provided to rotate in opposite directions to each other by the driving module 260.

In this way, as shown in FIG. 3, after the first reinforcing yarn 20a drawn out from the first bobbin 221 is wound in a spiral shape by the mutually reverse rotation movement of the first and second driving wheels 220 and 240, The second reinforcing yarn (20b) drawn out from the second bobbin (241) forms an overlapping structure in which the second reinforcing yarn (20b) is wound spirally in the reverse direction around the outer peripheral surface of the first reinforcing yarn (20b).

At this time, the second reinforcing yarn 20b is spaced apart from the outer peripheral surface of the core fiber 10 by the first reinforcing yarn 20a to form a space 30, thereby forming a space 30 between the core fiber 10 and the first and second reinforcing yarns ( When applying the fiber-reinforced composite reinforcing bar consisting of 20a) (20b) as a reinforcing bar in a concrete structure, the poured concrete is filled into the space 30 and is provided to maintain unity with the fiber-reinforced composite reinforcing bar, so that it can be subjected to earthquake or impact load, or There is an advantage in that durability and safety are improved when concrete structures vibrate due to dynamic loads.

In addition, the gear ratio of the second drive gear 262 and the second driven gear 265 compared to the rotation speed of the first drive wheel 220 due to the gear ratio of the first drive gear 261 and the first driven gear 264 The rotation speed of the second drive wheel 240 is provided to rotate at a reduced speed.

In this way, since the second drive wheel 240 rotates at a reduced rate relative to the first drive wheel 220, the spiral pitch of the second reinforcing yarn 20b is expanded compared to the first reinforcing yarn 20a, so that the first reinforcing yarn 20a The binding force of the core fiber (10) is improved by (20a), and the second reinforcing yarn (20b) is safely supported by the relatively tightly arranged core fibers (10), thereby strengthening the second reinforcing yarn (20b) and the core fiber (10). ) There is an advantage that the space 30 between them is formed of a uniform size.

In FIG. 4, the second bobbins 241 are arranged in plural numbers spaced apart in the longitudinal direction of the core fiber 10, and a plurality of strands of the second reinforcing yarn 20b are wound in multiple rows on the outer peripheral surface of the first reinforcing yarn 20a. As a result, the area of the space 30 by the second reinforcing yarn 20b is expanded to improve bonding with concrete.

In Figure 5, the first bobbin 221 and the first withdrawal guide 230 are provided to reciprocate linearly in the longitudinal direction of the core fiber 10 by the cam module 270.

The cam module 270 is installed on the first driving wheel 220 and is transported linearly in the longitudinal direction of the core fiber 10, and a transport force is applied in the opposite direction to the transport direction of the core fiber 10 by the elastic body, A cam rod 271 on which the first bobbin 221 and the first withdrawal guide 230 are installed at one end, and a cam rod 271 on the other end performs a cam movement with the second driving arm 242 and the cam rod ( It includes a cam 272 that pressurizes 271).

Looking at the operating state of the cam module 270, the point at which the cam rod 271 intersects the second driving arm 242 while the first and second driving wheels 220 and 240 rotate in opposite directions to each other When the cam 272 is pressed against the second driving arm 242, the cam rod 271 is moved straight in the direction of transport of the core fiber 10 as shown in FIG. 6 and changes the position of the first withdrawal guide 230. The spiral winding pitch of the first reinforcing yarn (20a) drawn out through the draw-out guide (230) is reduced.

And, when the cam rod 271 leaves the section where it intersects the second driving arm 242, the pressing force on the cam 272 by the second driving arm 242 is released, as shown in FIG. 5, and the cam rod 271 is released. When the core fiber 10 is returned and transported in the direction opposite to the transport direction, the spiral winding pitch of the first reinforcing yarn 20a drawn out through the first draw-out guide 230 is provided to expand.

In this way, the pitch of the first reinforcing yarn 20a is reduced and expanded by the cam module 270, thereby reducing and expanding the size of the space 30, which has the advantage of improving bonding strength with concrete.

3. Hardening step (S30)

The curing step (S30) according to the present invention is a step of curing the thermosetting epoxy resin by heating the core fiber (10) on which the uneven band (21) is formed through the winding step (S20) to a predetermined temperature.

The curing step (S30) is provided with a heating chamber 300 in which the internal space is heated by one or more heating means of hot air or a coil heater, and the core fiber 10 is heated while passing through the heating chamber to form a thermosetting epoxy resin. is provided to be hardened.

4. Cooling step (S40)

The cooling step (S40) according to the present invention is a step of cooling the core fibers (10) that have passed the curing step (S30) by putting them into the water tank (400) where cooling water is stored.

The cooling step (S40) is designed to quickly cool the core fibers (10) heated through the curing step (S30) and then continuously perform the cutting process in the cutting step (S50).

Meanwhile, the cooling water stored in the water tank 400 is configured to be maintained at a set temperature by a separate heat exchanger.

5. Cutting step (S50)

The cutting step (S50) according to the present invention is a step of cutting the core fiber 10 that has passed the cooling step (S40) to a set length.

The cutting step (S50) uses a cutting unit 500 including a cutter rotated by a motor, and the cutter moves in a direction perpendicular to the longitudinal direction of the core fiber 10 to cut the core fiber 10 to a predetermined length. It is equipped to cut.

As described above, the most preferred embodiments of the present invention have been described in the detailed description of the present invention, but various modifications may be made without departing from the technical scope of the present invention. Therefore, the scope of protection of the present invention should not be limited to the above-mentioned embodiments, but should be recognized to the technologies in the patent claims described later and to equivalent technical means from these technologies.

10: Core fiber 20: Reinforcement yarn
200: winding part 210: die
220: first driving wheel 230: first withdrawal guide
240: 2nd drive wheel 250: 2nd withdrawal guide

Claims (7)

An impregnation step of impregnating and drawing a plurality of core fibers (10) formed of one or more of glass fiber, aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber in a bundle while impregnating and drawing them in a thermosetting epoxy resin. S10); While drawing the bundle of core fibers (10) impregnated with the thermosetting epoxy resin, reinforcing yarn (20) formed of one or more of glass fiber, aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber is spirally formed on the outer peripheral surface. A winding step (S20) of forming a concavo-convex band (21) by winding; A curing step (S30) of curing the thermosetting epoxy resin by heating the core fiber 10 on which the uneven band 21 is formed through the winding step (S20) to a predetermined temperature; A cooling step (S40) of cooling the core fibers (10) that have passed the curing step (S30) by putting them into a water tank (400) storing cooling water; And a cutting step (S50) of cutting the core fiber 10 that has passed the cooling step (S40) to a set length,
The winding step (S20) is provided to spirally wind the reinforcing yarn 20 by the winding unit 200,
The winding unit 200 includes a die 210 that is drawn and molded into a predetermined cross-sectional shape while passing a bundle of core fibers 10, and is inserted into the outer peripheral surface of the die 210 and rotated by the drive module 260, A first driving wheel 220 provided with a first driving arm 222 so that the first bobbin 221 on which the first reinforcing yarn 20a is wound is installed, and a first bobbin wound on the first bobbin 221 The first withdrawal guide 230, which guides the withdrawal position of the instructor 20a, is inserted into the outer peripheral surface of the first drive wheel 220 and rotated by the drive module 260, and the second reinforcing yarn 20b is wound. The second driving arm 242 guides the withdrawal position of the second driving wheel 240 and the second reinforcing yarn 20b wound on the second driving wheel 240 so that the second bobbin 241 is installed. It includes a second withdrawal guide 250, and the first and second driving wheels 220 and 240 rotate around the dice 210 and form first and second reinforcing yarns 20a on the outer peripheral surface of the core fiber 10. ) (20b) is provided to be wound in a spiral manner,
The drive module 260 is installed on the first and second drive gears 261 and 262, which are arranged on the same axis and operate in conjunction with the motor (M), and the first drive wheel 220, and an idle gear ( 263), the first driven gear 264 is engaged with the first drive gear 261 and rotates, is installed on the second drive wheel 240, and is engaged with the second drive gear 262 to rotate the first driven gear 264. A method of manufacturing a high-strength GFRP reinforcement bar, comprising a second driven gear (265) rotating in the opposite direction to the gear (264).
delete delete According to clause 1,
The first and second driving wheels 220 and 240 are provided to rotate in opposite directions to each other by the drive module 260, and the first and second driving wheels 220 and 240 rotate in opposite directions to each other. After the first reinforcing yarn (20a) drawn from the first bobbin 221 is wound in a spiral manner, the second reinforcing yarn (20b) drawn from the second bobbin 241 is wound on the outer peripheral surface of the first reinforcing yarn (20b) in the reverse direction. It is wound in a spiral,
The second reinforcing yarn (20b) is spaced apart from the outer peripheral surface of the core fiber (10) by the first reinforcing yarn (20a) to form a space 30, so that the core fiber (10) and the first and second reinforcing yarns (20a) When applying the fiber-reinforced composite rebar consisting of (20b) as a rebar of a concrete structure, the concrete is filled into the space 30 and is provided to maintain unity with the fiber-reinforced composite rebar. A method of manufacturing a high-strength GFRP rebar. .
According to clause 1,
The rotational speed of the first drive wheel 220 due to the gear ratio of the first drive gear 261 and the first driven gear 264 is determined by the gear ratio of the second drive gear 262 and the second driven gear 265. The rotation speed of the second drive wheel 240 is provided to rotate at a reduced speed,
As the second drive wheel 240 rotates at a reduced rate relative to the first drive wheel 220, the helical pitch of the second reinforcing yarn (20b) is expanded compared to the first reinforcing yarn (20a). GFRP reinforcement manufacturing method.
According to clause 4,
The second bobbin 241 is arranged in plural numbers spaced apart in the longitudinal direction of the core fiber 10, and is provided so that a plurality of strands of the second reinforcing yarn 20b are wound in double rows on the outer peripheral surface of the first reinforcing yarn 20a. Method for manufacturing high-strength GFRP reinforcement.
According to clause 5,
The first bobbin 221 and the first withdrawal guide 230 are provided for linear reciprocating movement in the longitudinal direction of the core fiber 10 by the cam module 270,
The cam module 270 is,
It is installed on the first driving wheel 220 and is transported straight in the longitudinal direction of the core fiber 10, and the transport force is applied in the opposite direction to the transport direction of the core fiber 10 by the elastic body, and the first bobbin 221 is located at one end. And a cam rod 271 on which the first withdrawal guide 230 is installed,
It includes a cam 272 installed on the other end of the cam rod 271 and pressing the cam rod 271 while performing a cam movement with the second driving arm 242,
While the first and second drive wheels 220 and 240 rotate in opposite directions, at the point where the cam rod 271 intersects the second drive arm 242, the cam 272 rotates in the second drive arm 242. ), when the cam rod 271 is moved straight in the direction of transport of the core fiber 10 and changes the position of the first pull-out guide 230, the first reinforcing yarn (271) is drawn out through the first pull-out guide 230. The helical winding pitch of 20a) is reduced,
When the cam rod 271 leaves the section where it intersects the second driving arm 242, the pressing force on the cam 272 by the second driving arm 242 is released and the cam rod 271 moves toward the core fiber 10. When returned and transported in the direction opposite to the transport direction, the spiral winding pitch of the first reinforcing yarn (20a) drawn out through the first withdrawal guide (230) is provided to expand,
A method of manufacturing a high-strength GFRP reinforcement bar, characterized in that the size of the space portion 30 is reduced and expanded by reducing and expanding the pitch of the first reinforcing yarn (20a) by the cam module 270.