KR20010028610A - Hybrid bar and its product method and its fabric - Google Patents

Abstract

PURPOSE: A hybrid bar, a method to manufacture the hybrid bar and a structure using the hybrid bar are provided to reduce specific gravity, to improve tensile force and strength, and to prevent the split generated by bending. CONSTITUTION: A hybrid bar(17) comprises a core-fiber(10) of several plies, a covering fiber(13a,13b) of several plies and resins(25,26). In the hybrid bar, the core fiber is placed in the central part, and the covering fiber surrounds the core fiber. A first resin, and a second resin cover the core fiber and the covering fiber. The core fiber and the covering fiber are hardened by heat. The method to manufacture the hybrid bar comprises the steps of supplying the core fiber, impregnating the core fiber with the resins in a resin tank(20), putting the core fiber in a braiding device(30), supplying the covering fiber around the core fiber, and hardening the resins remaining in the core fiber and the covering fiber.

Description

Hybrid bar and its manufacturing method and structure using hybrid bar {Hybrid bar and its product method and its fabric}

The present invention relates to a reinforcing member used in concrete structures and various structures, and in particular, a hybrid bar having a lightweight and high-strength property used in concrete reinforcing members, sporting goods, leisure goods and many other fields, and a method of manufacturing the same and It relates to a structure using a hybrid bar.

Currently, steel beams are used for beams, columns or reinforcement of concrete structures. These steel members are widely used as a support for low prices and abundant resources, but as civil engineering and building technology have recently developed, many buildings that do not match the characteristics of these steel members have appeared.

The biggest drawback in the characteristics of the steel member is that it is not suitable for use as a large reinforcing member of a large building structure due to its large proportion of the reinforcing steel itself and its inconvenience in carrying and working. In addition, if stored for a long time for the construction, or damaged by external factors after construction of the building, the steel member accommodated in the interior of the building is exposed to the atmosphere and corroded in contact with moisture, causing a decrease in durability of the structure.

To solve this problem, the FRP bar (Fiber Reinforcement Plastic bar) has been developed. The FRP bar is arranged in a certain direction so that the tensile strength and strength are improved to some extent, but the fiber direction is formed in one direction and bent. The phenomenon of cracking occurs.

The present invention is provided to solve the problems of the prior art as described above, the specific gravity is small, the tensile strength and strength is improved, and the phenomenon of cracking due to bending does not occur and provides a structure and a structure using the hybrid bar Its purpose is to.

1 is a schematic diagram showing a manufacturing process of a hybrid bar according to a first embodiment of the present invention,

Figure 2 is a cross-sectional view of the resin tank showing a process in which the core fiber shown in Figure 1 passes through the resin tank,

3 is a schematic view showing a state in which the coated fiber is drawn out from the braiding apparatus shown in FIG. 1 and positioned around the core fiber;

Figure 4 is a detailed view showing a state in which the coating fibers surrounding the circumference of the core fiber shown in Figure 3 is woven in the form of a fabric,

5 is a detailed view showing the compression roller shown in FIG.

6 is a schematic diagram showing a manufacturing process of a hybrid bar according to a second embodiment of the present invention;

7 is a perspective view showing a loading state of the hybrid bar according to the manufacture of the structure using the hybrid bar according to a preferred embodiment of the present invention,

8 is a detailed view showing that the hybrid bar loaded with a plurality of stages is bonded by a resin in the manufacturing process of the structure using a hybrid bar according to a preferred embodiment of the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

10 core fiber 13 coated fiber

17: hybrid bar 20, 21: resin tank

25, 26, 27: Resin 30: braiding device

50: cooling device 60: compression roller

According to the present invention for achieving the object as described above, in the hybrid bar utilizing the characteristics of each fiber by hybridizing the various types of fibers, a plurality of core fibers and a plurality of fiber strands are woven There is provided a hybrid bar comprising a plurality of strands of coated fibers surrounding the core fiber, and the resin impregnated and cured in the core fiber and the coated fiber.

In addition, according to the present invention, the plurality of strands of the core fiber is provided with a hybrid bar that is supplied in the form of twisted or untwisted fiber in the form of tow, roving or rope.

Further, according to the present invention, the plurality of strands of the fiber is supplied in the form of twisted or untwisted fiber in the form of tow, roving or rope, the supplied multiple strands of fiber wrapped around the core fiber, A hybrid bar is provided in which a plurality of protrusions are formed along the circumference of the coating fiber.

In addition, according to the present invention, in the method of manufacturing a hybrid bar utilizing the characteristics of each fiber by hybridly stacking various types of fibers, supplying a plurality of strands of core fibers, and impregnating the resin into the core fibers And, supplying a plurality of strands of coated fiber around the core fiber impregnated with the resin, enclosing the supplied coated fiber to surround the core fiber, and impregnated in the core fiber, There is provided a method for producing a hybrid bar comprising the step of curing the resin impregnated from the core fiber to the surface of the coated fiber.

In addition, according to the present invention, there is provided a method for producing a hybrid bar that is completely cured after forming a protrusion around the coated fiber before the resin impregnated in the coated fiber is completely cured.

In addition, according to the present invention, in the method of manufacturing a hybrid bar utilizing the characteristics of each fiber by hybridly stacking various types of fibers, supplying a plurality of strands of core fibers, and impregnating the resin into the core fibers And, curing the resin impregnated in the core fiber, supplying a plurality of strands of coated fiber around the core fiber cured with the resin, and weaving the supplied coated fiber to circumference of the core fiber. There is provided a method of manufacturing a hybrid bar comprising the step of wrapping.

In addition, according to the present invention, in a structure using a hybrid bar that hybridized and laminated various types of fibers to take advantage of the characteristics of each fiber, one stage hybrid bar is disposed in parallel to one surface, the two stage hybrid bar is the 1 It is arranged in parallel so as to intersect the upper surface of the hybrid bar of the stage, the three-stage hybrid bar is loaded up to a predetermined thickness in the form arranged in the same manner as the hybrid bar of the first stage on the upper surface of the two-stage hybrid bar, The structure is formed by the adhesive resin is applied and cured at the site where the hybrid bar of the end and the second and third stages are in contact with each other. The hybrid bar has a plurality of core fibers and a plurality of fiber strands interwoven with each other to form a core fiber. It consists of a plurality of strands of coated fibers surrounding the periphery, and the resin impregnated and cured in the core fibers and the coated fibers This hybrid structure using what is provided.

In addition, according to the present invention, the adhesive resin is provided with a structure using a hybrid bar that additionally accommodates a short length of fiber.

In addition, according to the present invention, there is provided a structure using a hybrid bar, characterized in that a plurality of protrusions are formed along the circumference of the coating fiber.

In the following, with reference to the accompanying drawings, preferred embodiments of a structure using a hybrid bar and a method of manufacturing the hybrid bar according to the present invention will be described in detail.

Example 1

1 is a schematic diagram showing a manufacturing process of a hybrid bar according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of a resin tank showing a process in which the core fiber shown in Figure 1 passes through the resin tank. 3 is a schematic view showing a state in which the coated fiber is drawn out from the braiding apparatus shown in FIG. 1 and positioned around the core fiber, and FIG. 4 is a cloth covering the circumference of the core fiber shown in FIG. It is a detailed view showing a state woven in shape, Figure 5 is a detailed view showing a compression roller shown in FIG.

Here, Figure 5 (a) is a front view of the compression roller, (b) is a side view of the compression roller.

In the hybrid bar 17, the core fiber 10 is located at the center, and the covering fiber 13 is wrapped around the core fiber 10, and the first and second resins 25 and 26 are the core fiber 10. And the core fiber 10 and the coated fiber 13 are cured by the heat applied to the coated fiber 13.

As shown in FIG. 1, the core fiber 10 is a fiber such as carbon fiber or glass fiber or aramid fiber or polyethylene or nylon, and a plurality of strands of such core fiber 10 are twisted in the form of tow or roving or rope. It is supplied in the form of fibres, or twisted fibers. A plurality of strands of the core fibers (10a, 10b) are respectively wound on the tuft (1), the tuft (1) is installed in the fiber supply stand (5) to continuously supply the core fibers (10a, 10b).

As shown in FIG. 2, the core fibers 10a and 10b of the plurality of strands enter the resin tank 20 and come out of the resin tank 25 in a state in which the first resin 25 is impregnated. do. Thereafter, the multiple strands of core fibers 10a and 10b pass through the first guide 29a while the multiple strands of core fibers 10a and 10b are gathered into one strand of core fibers 10 and at the same time, excessively. The impregnated first resin 25 is removed from the core fiber 10. As the first resin 20, an epoxy resin, a phenol resin, a urethane resin, an unsaturated polyester or polyester resin, or a polyamide or vinyl ester resin is used.

The core fiber 10 enters the braiding device 30 which is the next facility. As shown in FIG. 3, the braiding device 30 has a circular frame 32 through which the core fiber 10 penetrates, and is installed on the frame 32 and moves along a predetermined movement path, respectively, and the coated fiber 13a. , 13b) is wound around a plurality of tufts 34, the coated fibers (13a, 13b) are withdrawn from each of the tufts 34 are positioned to advance around the core fiber (10). At this time, as shown in Figure 4, by the rotation of the frame 32 and the movement of the tuft 34, the coated fibers (13a, 13b) weaving the weaving yarn and warp orthogonal to the periphery of the core fiber (10) The structure wraps around the core fiber 10. Coated fibers 13a and 13b are also used as carbon fibers or glass fibers or aramid fibers or polyethylene or nylon, such as core fibers 10, and a plurality of strands of such coated fibers 13a and 13b are in the form of tow or roving or rope. It is supplied in the form of fibers with or without twist.

Then, the first resin 25 impregnated in the core fiber 10 is impregnated toward the coated fiber 13, and the core resin 10 and the coated fiber 13 are impregnated together.

The core fiber 10 and the coated fiber 13 thus formed are passed through the second resin bath 21 according to the kind of the product and the required amount of the resin, and the second fiber (10) is applied to the core fiber 10 and the coated fiber 13. 26) is impregnated. After the core fiber 10 and the coated fiber 13 are impregnated with the second resin 26, the core fiber 10 and the coated fiber 13 pass through the second guide 29b to remove the predetermined amount of the second resin 26 and enter the heating device 40. By getting heat. At this time, the heating device 40 has a two-stage heating form of the front end heating unit 40a and the rear end heating unit 40b, and the compression roller 60 is disposed between the front end heating unit 40a and the rear end heating unit 40b. ) Is located. The fiber passing through the tip heating part 40a passes through the compression roller 60 in an incompletely cured state.

As shown in Figure 5, the compression roller 60 is installed above and below the advancing fibers, grooves 63 are formed at regular intervals along the circumference of the upper and lower compression rollers (61, 62).

As the core fiber 10 and the coated fiber 13 are compressed between the upper and lower compression rollers 61 and 62 having such grooves 63 formed thereon, the outer surface of the incompletely cured coated fiber 13 is pressed into the roller 61. A protrusion corresponding to the groove 63 of 62 is formed. The protruding fiber is completely cured while passing through the rear heating device 40b of the heating device 40 to form a hybrid bar 17. The hybrid bar 17 thus formed passes through the cooling device 50 at room temperature. do.

Example 2

6 is a schematic diagram showing a manufacturing process of a hybrid bar according to a second embodiment of the present invention.

The second embodiment is the same as or similar to the first embodiment except that the first and second heating devices 41 and 42 are installed, compared to the first embodiment described above, and thus, the description of the same parts in the detailed description will be given. Omitted and given the same or similar reference numerals.

As shown in FIG. 6, the first heating device 41 is located between the first guide 29a and the braiding device 30, and the second heating device 42 is located behind the braiding device 30. The second resin tank 21 is installed between the braiding device 30 and the second heating device 42.

The plurality of strands of core fibers 10a and 10b drawn out from the fiber supply stand 5 are impregnated in the first resin bath 20, pass through the first guide 29a, and pass through the first heating device 41. do. Then, the multiple strands of core fibers 10a and 10b are bonded to one strand of coarse core fibers 10 by curing the first resin 25. This core fiber 10 passes through the braiding device 30 and a single strand of core fiber 10 hardened by the rotation of the frame 32 and the movement of the tuft 34 of the braiding device 30. A plurality of coated fibers 13a and 13b are wrapped around the fabric form.

The core fiber 10 and the coated fiber 13 enter the second resin tank 21 and come out of the second resin tank 21 in a state in which the second resin 26 is impregnated. 29b), the second heating device 42 enters the second heating device 42 while the second resin 26 impregnated with excess is removed. At this time, the second heating device 42 has a two-stage heating form of the front end heating part 42a and the rear end heating part 42b, and is compressed between the front end heating part 42a and the rear end heating part 42b. 60 is located. The fiber passing through the tip heating part 42a passes through the compression roller 60 in an incompletely cured state.

The fiber passing through the compression roller 60 is completely cured while passing through the rear end heating part 42b of the second heating device 42 to form a hybrid bar 17, and the hybrid bar 17 is a cooling device 50. At room temperature while passing through.

As described above, the core fiber 10 of the hybrid bar 17 has rigidity and elasticity against tension and bending, and the orthogonally interwoven fiber 13 serves to prevent the core fiber 10 from splitting.

On the other hand, another hybrid bar is passed through the second resin bath 21 emptied after weaving the wrapping fiber 13 around the core fiber 10 of the fully cured strand through the first heating device 41 In order to prevent the second resin 26 from being impregnated into the coated fiber 13, the second heating device 42 and the cooling device 50 are passed in this state to form a hybrid bar.

The structure using the hybrid bar formed as described above will be described in detail.

In the drawings, Figure 7 is a perspective view showing a loading state of the hybrid bar according to the production of the structure using the hybrid bar according to a preferred embodiment of the present invention.

As shown in FIG. 7, the hybrid bars 17 produced as in Embodiment 1 or Embodiment 2 have a plurality of first-stage hybrid bars 17-1 positioned horizontally and parallel to one surface at regular intervals. And a plurality of two-stage hybrid bars 17-2 and a two-stage hybrid bar 17-2 positioned on the top surface of the first-stage hybrid bar 17-1 while maintaining parallelism at a predetermined interval in the vertical direction. In the same manner as the plurality of three-stage hybrid bars 17-3 positioned in the same manner as the one-stage hybrid bar 17-1, they are continuously stacked while being orthogonal. The stacked hybrid bars 17 form a structure having a predetermined thickness.

A hybrid bar as a reinforcing structure of a concrete structure by applying a curable resin to the contact portions of the orthogonal one-, two-, and three-stage hybrid bars 17-1, 17-2, and 17-3 and applying heat to completely harden it. The structure of 17) is formed. At this time, the protrusion formed on the hybrid bar 17 improves adhesion with the hardened concrete.

Example 3

In the drawings, Figure 8 is a detailed view showing that the hybrid bar loaded in a plurality of stages in the manufacturing process of the structure using the hybrid bar according to the present invention is bonded by a resin.

As shown in FIG. 8, the structure using the hybrid bar of Example 3 is applied to the first and second resins 25 without heating in the heating devices 40, 40a, and 40b of Example 1 or 2. , 26 is a structure using a hybrid bar 17 impregnated in the core fiber 10 and the coated fiber 13.

As described above, the uncured hybrid bar 17 has a structure in which the above-described structures, that is, hybrid bars 17-1, 17-2, and 17-3 in the first, second, and third stages are orthogonal to form a predetermined thickness. It is arranged in the same shape as a structure.

In this way, a portion of the hybrid bar 17 is applied to the curable resin 27 for receiving the short fibers (18) in the contact area with each other. Here, the short fibers 18 use carbon fibers or glass fibers or aramid fibers or polyethylene or nylon.

The first and second resins impregnated in the core fiber 10 and the coated fiber 13 by applying heat to the structure of the hybrid bar 17 configured as described above (reference numerals 25 and 26 shown in FIGS. 1 and 6). And the curable resin 27 is cured to form a structure of the hybrid bar 17.

On the other hand, the first resin and the second resin may be the same type of resin, different types of resin may be used according to the product characteristics of the hybrid bar, and only one of the first and second resins may be used. In some cases.

As described in detail above, the hybrid bar of the present invention has the advantage that the coating fibers woven into the circumference of the core fiber is formed to prevent the splitting of the core fiber against bending.

In addition, a protrusion is formed around the hybrid bar to improve adhesion to concrete while being located inside the concrete structure.

In addition, when a structure using a hybrid bar composed of a hybrid bar is used as a reinforcing member of a concrete structure, the concrete structure is resistant to vibration resistance and weight reduction of the structure due to the advantages of high strength, high elasticity, chemical resistance, and durability. Has an excellent advantage.

Although the technical idea of the hybrid bar of the present invention and its manufacturing method and the structure using the hybrid bar has been described with reference to the accompanying drawings, this is illustrative of the best embodiment of the present invention and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (10)

In the hybrid bar that hybridized and laminated various kinds of fibers to take advantage of the characteristics of each fiber, Core fiber of many strands located in the center, Multiple fiber strands are woven to wrap around the core fiber of the plurality of strands, And a resin which is hardened by being impregnated into the core fiber and the coated fiber. The method of claim 1, The plurality of strands of the core fiber is a hybrid bar, characterized in that supplied in the form of twisted or untwisted fiber in the form of tow, roving or rope. The method according to claim 1 or 2, The plurality of strands of the fiber is supplied in the form of twisted or untwisted fiber in the form of tow, roving or rope, the supplied multi-stranded fiber is wrapped, the hybrid bar characterized in that it wraps around the core fiber. The method of claim 3, wherein Hybrid bar characterized in that a plurality of protrusions formed along the circumference of the coating fiber. In the method of manufacturing a hybrid bar that hybridized and laminated various types of fibers to take advantage of the characteristics of each fiber, Supplying a plurality of strands of core fibers, Impregnating a resin into the core fiber; Supplying a plurality of coated fibers around the core fiber impregnated with the resin; Weaving the supplied fiber to wrap around the core fiber; And a step of curing the resin impregnated in the core fiber and impregnated with the surface of the coated fiber from the core fiber. The method of claim 5, The method of producing a hybrid bar, characterized in that the resin impregnated in the coated fiber is completely cured after forming a protrusion around the coated fiber before the resin is completely cured. In the method of manufacturing a hybrid bar that hybridized and laminated various types of fibers to take advantage of the characteristics of each fiber, Supplying a plurality of strands of core fibers, Impregnating a resin into the core fiber; Curing the resin impregnated in the core fiber; Supplying a plurality of strands of coated fiber around the core fiber cured with the resin; The method of manufacturing a hybrid bar comprising the step of weaving the supplied coated fiber to wrap around the core fiber. In the structure using a hybrid bar that hybridized and laminated various types of fibers to take advantage of the characteristics of each fiber, The first stage hybrid bar is disposed parallel to one surface, and the second stage hybrid bar is disposed parallel to the top surface of the first stage hybrid bar, and the third stage hybrid bar is disposed on the top surface of the second stage hybrid bar. It is loaded to a predetermined thickness in a form arranged in the same manner as the hybrid bar of the first stage, Where the hybrid bar of the first stage and the second stage and the third stage is in contact with the adhesive resin is applied and cured to form a structure, The hybrid bar includes a plurality of strands of core fibers located in the center, a plurality of strands of fiber coated with a plurality of strands of fiber wrapped around the core fiber, and the resin impregnated and cured by the core fibers and the coated fibers. Structure using a hybrid bar, characterized in that configured. The method of claim 8, The adhesive resin is a structure using a hybrid bar, characterized in that additionally short fibers are accommodated. The method according to claim 8 or 9, A structure using a hybrid bar, characterized in that a plurality of protrusions formed along the circumference of the coating fiber.