KR102735443B1 - Manufacturing apparatus for hybrid fiber reinforced plastic bent rebar and hybrid fiber reinforced plastic bent rebar manufactured therefrom - Google Patents

Abstract

The present invention relates to a device for manufacturing a fiber-reinforced composite bent rebar, comprising: a core fiber yarn supply unit including a plurality of core fiber yarn rovings in which core fiber yarns are wound for manufacturing a fiber-reinforced composite bent rebar; a resin impregnation unit for impregnating each core fiber yarn supplied from the core fiber yarn supply unit with a resin; at least one rod processing unit for processing a reinforcing bar rod having a preset cross-sectional shape by drawing and forming the core fiber yarn bundles supplied into a bundle; a rib forming unit for spirally winding rib fiber yarns on the outer surface of the reinforcing bar rod discharged from the rod processing unit to form ribs on the outer surface of the reinforcing bar rod; a first hardening unit for promoting a hardening reaction by irradiating the reinforcing bar rod on which the ribs are formed, thereby hardening the surface of the reinforcing bar rod; and at least one rod winding unit including a winding frame for winding the reinforcing bar rod, the surface of which is hardened through the first hardening unit, to form a bent rebar; and a rod winding unit for completing the winding of the reinforcing bar rod. It comprises a second hardening section that promotes a hardening reaction by irradiating near-infrared rays or ultraviolet rays to the reinforcing bar rod wound on the winding frame while simultaneously rotating the winding frame and moving it in one direction, thereby completely hardening the reinforcing bar rod.
According to the present invention as described above, by improving the structure of the device, not only can the core fibers supplied from the core fiber supply section be dried and aligned while applying tension thereto, thereby preventing twisting of the core fibers, but also uniform impregnation of the outer surface of the core fibers with resin can be achieved, thereby easily forming a reinforcing bar rod uniformly impregnated with resin through the rod processing section.
In addition, since the present invention does not require cutting the reinforcing bar rod to replace the rod processing portion when the specifications of the manufactured reinforcing bar rod are changed, the replacement work of the rod processing portion can be performed more quickly, thereby greatly improving the productivity of the fiber-reinforced composite bent reinforcing bar.
In addition, the present invention can manufacture fiber-reinforced composite bent reinforcing bars of various shapes since it is provided with a rod winding section having a circular or polygonal cross-section for winding the reinforcing bar rod.

Description

{Manufacturing apparatus for hybrid fiber reinforced plastic bent rebar and hybrid fiber reinforced plastic bent rebar manufactured therefrom}

The present invention relates to a device for manufacturing a fiber-reinforced composite bent reinforcing bar, and more specifically, to a device for manufacturing a fiber-reinforced composite bent reinforcing bar, which is capable of drying and aligning core fibers supplied from a core fiber supply unit while applying tension, and more quickly performing a replacement operation of a rod processing unit when the specification of the manufactured reinforcing bar rod is changed, and is equipped with a rod winding unit for winding the reinforcing bar rod.

Structures such as piers used in building or bridge construction are generally made of concrete. While concrete is strong in compression, it is weak in tension, so to reinforce tension, steel bars are embedded inside and used as rebar.

However, conventional rebars such as the above are subject to serious corrosion due to various environmental factors, such as snow removal materials or seawater environments, and to prevent this, epoxy coating is applied to the surface and used, but there is still the problem that it is difficult to overcome the problem of rebar corrosion in a chloride concrete environment.

For the reasons mentioned above, reinforcing bars made of fiber-reinforced composites are being used recently to replace the steel bars used in the past. These fiber-reinforced composite reinforcing bars not only have excellent corrosion resistance, heat resistance, and corrosion resistance, but also have very high strength, and are attracting attention as a semi-permanent new material whose applications are expanding across all industrial fields.

Meanwhile, Korean Patent Registration No. 10-2198226 discloses a fiber-reinforced composite reinforcing bar manufacturing device, which includes a plurality of creel sections in which roving fiber yarns are wound, a resin impregnation section for unrolling each roving fiber yarn from the plurality of creel sections into a bundle and impregnating them, a rod processing section for processing a reinforcing bar rod by drawing and forming by inputting the impregnated roving fiber yarn bundle, a winding section for forming a rib by spirally winding rib fiber yarns on the outer surface of the reinforcing bar rod discharged from the rod processing section, a hardening section for hardening the reinforcing bar rod on which the ribs have been formed, a cooling section for cooling the reinforcing bar rod heated in the hardening section, and a transfer section for pulling the reinforcing bar rod passing through the cooling section backward and transferring the reinforcing bar rod to a subsequent process throughout the entire process.

However, the conventional fiber-reinforced composite reinforcing bar manufacturing device as described above has a problem in that when moisture remains on the outer surface of roving fiber yarns being transported from a plurality of creel sections to a resin-impregnating section, or when the tension of the roving fiber yarns is loose and they are introduced into the resin-impregnating section in a twisted state, uniform resin impregnation does not occur on the outer surface of the roving fiber yarns, making it difficult to form a reinforcing bar rod uniformly impregnated with resin through a subsequent rod processing section.

In addition, since the conventional fiber-reinforced composite reinforcing bar manufacturing device has an integrated structure in the front and rear molds of the rod processing section in which an internal passage through which a bundle of roving fiber yarns passes is formed, when a change in the diameter of the reinforcing bar to be manufactured is required, a cumbersome task is required in which the reinforcing bar rod discharged to the rear of the mold of the existing rod processing section is cut, separated from the existing mold, the existing mold is replaced with a new mold, the cut reinforcing bar rod is inserted into the replaced mold, and then this is reconnected to the reinforcing bar rod bitten on the transfer section side.

As described above, the conventional fiber-reinforced composite reinforcing bar manufacturing device has a problem in that when the diameter of the reinforcing bar rod being manufactured changes, the working time for replacing the mold significantly increases, resulting in a decrease in product productivity.

In addition, although conventional fiber-reinforced composite reinforcing bar manufacturing devices can manufacture straight reinforcing bars that are usually used as main reinforcing bars or auxiliary reinforcing bars, since the resin constituting the reinforcing bars is formed of a thermosetting material, it is difficult to change the shape of the reinforcing bars into other shapes after manufacturing is complete, and thus bent reinforcing bars such as belt reinforcing bars, spiral reinforcing bars, and stirrups arranged to surround main reinforcing bars or auxiliary reinforcing bars cannot be manufactured.

Korean Patent No. 10-2198226 (Fiber-reinforced composite reinforcing bar manufacturing device for concrete and fiber-reinforced composite reinforcing bar manufactured thereby, 2021.01.05)

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fiber-reinforced composite bent reinforcing bar manufacturing device having an improved structure, which can dry and align core fibers supplied from a core fiber supply unit while applying tension, and can more quickly perform the replacement work of a rod processing unit when the specification of the manufactured reinforcing bar rod is changed, and which is equipped with a rod winding unit for winding the reinforcing bar rod.

According to the present invention for achieving the above object, the present invention comprises a core fiber yarn supply section including a plurality of core fiber yarn rovings in which core fiber yarns are wound for manufacturing a fiber-reinforced composite bent reinforcing bar, a resin impregnation section for impregnating each core fiber yarn supplied from the core fiber yarn supply section with a resin, at least one rod processing section for processing a reinforcing bar rod having a preset cross-sectional shape by feeding each core fiber yarn impregnated with resin into a bundle and pultruding the fed core fiber yarn bundle, and a rib forming section for forming a rib on the outer surface of the reinforcing bar rod discharged from the rod processing section by spirally winding rib fiber yarns on the outer surface of the reinforcing bar rod, and a first hardening section for promoting a hardening reaction by irradiating the reinforcing bar rod on which the ribs are formed, thereby hardening the surface of the reinforcing bar rod, and at least one rod winding section including a winding frame for winding the reinforcing bar rod, the surface of which is hardened through the first hardening section, to form a bent reinforcing bar, and rotating the winding frame on which the winding of the reinforcing bar rod is completed. A fiber-reinforced composite bent reinforcing bar manufacturing device is provided, characterized in that it includes a second hardening section that promotes a hardening reaction by irradiating near-infrared rays or ultraviolet rays to the reinforcing bar rod wound on the winding frame while simultaneously transporting in one direction, thereby completely hardening the reinforcing bar rod.

Here, a core fiber alignment unit is provided between the core fiber supply unit and the resin impregnation unit, and aligns each core fiber supplied from the core fiber supply unit so as to be spaced apart in the transverse direction and also adds tension, wherein the core fiber alignment unit includes a plurality of guide bars each of which is spaced apart from each other along the supply direction of the core fibers and has a plurality of guide grooves formed on one side of each outer circumference spaced apart at a predetermined interval along the longitudinal direction, into which the core fibers are inserted along the outer circumference direction, and the core fibers can be arranged to alternately pass through the upper and lower outer circumferences of neighboring guide bars.

In addition, the core fiber alignment part may further include a heating means installed along the longitudinal direction inside the guide bar.

In addition, the load processing section includes an internal passage in which a first internal passage is formed to taper so as to become narrower toward an exit, and a second internal passage is formed in a straight line at the rear of the first internal passage and processes the core fiber bundle into a reinforcing rod having a preset cross-sectional shape, and is sequentially formed, wherein a lower body and an upper body formed to be mutually separable can be mutually coupled to form the internal passage.

In addition, the rib forming section includes a rib fiber roving having a rib fiber yarn wound on an outer surface and supplying the rib fiber yarn to an outer surface of the reinforcing bar rod, a support on which the rib fiber yarn roving is settled, and a first tension adding roller and a second tension adding roller sequentially arranged in a lower portion of the support along a discharge direction of the reinforcing bar rod, and an elastic member connected between the support and the second tension adding roller and providing an elastic restoring force to the second tension adding roller in the direction of the support, and an upper ring and a lower ring arranged in a vertical direction on one side of the rod processing section, wherein the rib fiber yarn can be wound at least once around each of the upper ring and the lower ring through the lower portion of the first tension adding roller and the upper portion of the second tension adding roller, and then supplied to the outer surface of the reinforcing bar rod.

And, the sand application unit may further include an adhesive spraying means for spraying and applying adhesive to the outer surface of the reinforcing bar rod discharged from the rib forming part, a sand spraying means for spraying and applying sand to the outer surface of the reinforcing bar rod to which the adhesive has been applied, and an air spraying means for removing unbonded sand by spraying air to the outer surface of the reinforcing bar rod to which the sand has been applied.

In addition, it further includes a forming restoration part that pressurizes the outer surface of the reinforcing bar rod discharged from the rib forming part to restore the reinforcing bar rod to a preset cross-sectional shape.

The above-mentioned molding restoration part includes a lower molding restoration roller having a lower groove formed along an outer circumference corresponding to an outer surface of the reinforcing bar rod, and an upper molding restoration roller installed above the lower molding restoration roller and having an upper groove formed along an outer circumference corresponding to an outer surface of the reinforcing bar rod, wherein the lower groove and the upper groove can be formed to surround an outer surface of the reinforcing bar rod.

In addition, the winding frame may be formed in any one shape selected from among circular, elliptical, or polygonal cross-sectional shapes.

And, the load winding part may include a body having a shape selected from among a circular, oval, or polygonal cross-sectional shape, a winding frame including a pair of rotary shafts protruding in both directions of the body, a support frame including a pair of support plates having open upper support grooves formed on the upper ends for supporting each of the rotary shafts, a power means coupled to one side of the support frame and having a driving shaft coupled to one of the rotary shafts, a pinion gear coupled to the other rotary shaft of the winding frame and having a plurality of teeth formed along an outer circumferential surface, and an elevating means coupled to a lower portion of the support frame and elevating the support frame upwardly and downwardly.

In addition, the second hardening section may include a hardening tank having a light source installed therein that irradiates near-infrared or ultraviolet rays along the longitudinal direction of the hardening tank and a pair of transfer rails that are installed at a predetermined interval on the inner upper side of the hardening tank along the longitudinal direction of the hardening tank, each end of which extends to the upper side of the rod winding section, and a transfer frame that is installed so as to be able to move along the pair of transfer rails, and a pair of rotational shafts are rotatably coupled to one side of the lower side, and when the support frame moves downward and the rotational shaft is disengaged from the support groove, the transfer frame moves the winding frame along the longitudinal direction of the hardening tank, and a rack member that is installed on one side of the inner surface of the hardening tank corresponding to the pinion gear along the longitudinal direction of the hardening tank and has teeth formed on an upper surface that are gear-engaged with teeth of the pinion gear.

According to the present invention as described above, by improving the structure of the device, not only can the core fibers supplied from the core fiber supply section be dried and aligned while applying tension thereto, thereby preventing twisting of the core fibers, but also uniform impregnation of the outer surface of the core fibers with resin can be achieved, thereby easily forming a reinforcing bar rod uniformly impregnated with resin through the rod processing section.

In addition, since the present invention does not require cutting the reinforcing bar rod to replace the rod processing portion when the specifications of the manufactured reinforcing bar rod are changed, the replacement work of the rod processing portion can be performed more quickly, thereby greatly improving the productivity of the fiber-reinforced composite bent reinforcing bar.

In addition, since the present invention is provided with a rod winding section for winding a reinforcing bar rod, it is possible to manufacture a fiber-reinforced composite bent reinforcing bar having various shapes.

Figure 1 is a schematic diagram of a fiber-reinforced composite bent reinforcement bar manufacturing device according to one embodiment of the present invention.
Figure 2 is a schematic perspective view of a roving guide according to one embodiment of the present invention;
FIG. 3 is a perspective view of a core fiber alignment part according to one embodiment of the present invention;
Figure 4 schematically illustrates the state in which core fibers pass through the core fiber alignment section.
Figures 5 (a) and (b) schematically illustrate a load processing unit according to one embodiment of the present invention.
Figure 6 schematically illustrates a rib forming part according to one embodiment of the present invention.
Figure 7 schematically illustrates a sandblasting unit according to one embodiment of the present invention.
Figure 8 schematically illustrates a restoration part according to one embodiment of the present invention.
FIG. 9 and FIG. 10 are drawings for explaining the configuration and linked operation of the load winding unit and the second hardening unit according to one embodiment of the present invention.
Figure 11 illustrates a state in which a reinforcing bar rod is wound around a winding frame having various cross-sectional shapes of a fiber-reinforced composite bent reinforcing bar manufacturing device according to one embodiment of the present invention.
FIG. 12 illustrates various types of bent reinforcing bars manufactured using a fiber-reinforced composite bent reinforcing bar manufacturing device according to one embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. It should be noted that the same components in the drawings are indicated by the same symbols wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the invention are omitted.

FIG. 1 is a schematic diagram of a fiber-reinforced composite bent reinforcing bar manufacturing device according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of a roving guide according to an embodiment of the present invention, FIG. 3 is a perspective view of a core fiber yarn alignment part according to an embodiment of the present invention, FIG. 4 is a schematic diagram illustrating a state in which core fiber yarns pass through the core fiber yarn alignment part, FIGS. 5 (a) and 5 (b) are schematic diagrams illustrating a rod processing part according to an embodiment of the present invention, FIG. 6 is a schematic diagram illustrating a rib forming part according to an embodiment of the present invention, FIG. 7 is a schematic diagram illustrating a forming restoration part according to an embodiment of the present invention, FIG. 8 is a schematic diagram illustrating a sandblasting part according to an embodiment of the present invention, and FIGS. 9 and 10 are drawings for explaining the configuration and linked operation of a rod winding part and a second hardening part according to an embodiment of the present invention.

Referring to FIG. 1, a fiber-reinforced composite bent reinforcement bar manufacturing device (1) according to one embodiment of the present invention is configured to include a core fiber yarn supply unit (10), a core fiber yarn alignment unit (20), a resin impregnation unit (30), a rod processing unit (40), a rib forming unit (50), a sand application unit (60), a forming restoration unit (70), a first hardening unit (80), a rod winding unit (90), and a second hardening unit (100).

The core fiber supply section (10) is formed by a plurality of core fiber rovings (12) in the shape of a tube, in which core fibers (12a) are wound to manufacture a rod of a fiber-reinforced composite bent reinforcing bar, and are arranged in the up-down and left-right directions on a multi-stage shelf frame (11). For convenience of explanation, FIG. 1 illustrates the core fiber supply section (10) as viewed from above.

Here, the core fiber is generally composed of glass fiber, but is not limited thereto, and may be composed of any one selected from aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber, or a combination thereof.

Meanwhile, the number of core fiber rovings (12) is determined according to the diameter of the preset reinforcing bar rod, and the core fibers (12a) released from each core fiber roving (12) are fed into the resin impregnation section (20) in a state where they are separated into strands without being bundled through the first roving guide (G1) arranged at the rear of the core fiber supply section (10), and impregnation is performed.

Here, the first roving guide (G1), as shown in Fig. 2, is a plate-shaped member that is arranged vertically at the rear of the core fiber supply section (10), and has a structure in which a plurality of passage holes (H) are formed on the outer surface through which the core fiber passes in the up-down and left-right directions.

This first roving guide (G1) prevents each core fiber from becoming entangled with each other by passing each core fiber through a number of passing holes (H) and serves to apply tension to each core fiber.

As shown in Fig. 3, the core fiber alignment section (20) is formed by a plurality of guide bars (21) spaced apart from each other along the supply direction of the core fiber (12a), and having guide grooves (21aa) formed along the outer peripheral surface at a predetermined interval along the length direction, as shown in enlarged view A, into which the core fiber is inserted.

As seen in enlarged view B, this guide bar (21) has a structure in which a coating layer (21a) made of urethane material is formed on the outer surface, and an insertion groove (21aa) is formed in this coating layer (21a).

In addition, the guide bar (21) has a heating means (21b) installed along the length thereof. This heating means (21b) heats the core fiber yarn passing through the insertion groove (21aa) to remove moisture remaining on the outer surface of the core fiber yarn.

Meanwhile, the core fibers (12a) are arranged to alternately pass through the upper and lower outer surfaces of neighboring guide bars (21) as shown in Fig. 4 so that tension can be added.

As described above, the present invention can align core fibers supplied from a core fiber supply unit (10) by applying tension to the core fiber alignment unit (20), thereby preventing twisting of core fibers supplied backwards. In addition, since moisture remaining on the outer surface is removed through the heating means (21b), resin can be uniformly impregnated into the outer surface of the core fibers through the resin impregnation unit (30) described below, so that a reinforcing bar rod uniformly impregnated with resin can be easily formed through the rod processing unit (40) described below.

In addition, a second roving guide (G2) is installed at the rear of the core fiber alignment section (20). Since this second roving guide (G2) has the same configuration and effect as the first roving guide (G1), a detailed description thereof is omitted.

The resin impregnation section (30) can be formed in the form of a tank filled with resin within a receiving space (S) configured to impregnate each core fiber yarn supplied as a strand through the second roving guide (G2).

Here, the resin filled in the resin impregnation section (30) is an epoxy series for achieving the purpose of increasing the tensile strength and elastic modulus of the reinforcing bar, and may be composed of a thermosetting resin mixed with a hardener and a coloring agent, but is not limited thereto, and may be composed of a photocurable resin mixed with a UV hardener instead of a hardener.

More specifically, the resin may be selected from either a vinylester resin or an unsaturated polyester resin among the epoxy series, and the hardener and UV hardener may be selected in accordance with the type of resin.

In addition, the present invention can also be used by blending ceramic materials such as silica (SiO ₂ ) or alumina (Al ₂ O ₂ ) into vinylester resin or unsaturated polyester resin as needed.

Meanwhile, a third roving guide (G3) is installed at the rear of the resin impregnation section (30). This third roving guide (G3) has the same configuration and effect as the first roving guide (G1), but since it is installed at the rear of the resin impregnation section (30), it also plays a role in controlling the amount of resin impregnated in the core fiber yarn passing through the passage hole (H).

As shown in Fig. 1, the load processing section (40) is formed in a circular tubular shape with a plurality of sections arranged in parallel at the rear of the third roving guide (G3), and has flanges formed at both ends, as shown in Fig. 5 (a), and is formed to be divided into a lower body (41) and an upper body (42) based on the center of the internal passage formed inside.

Here, the load processing section (40) may be coated with hard chrome to allow the core fiber bundle to move more smoothly along the inner surface where the internal passage is formed, and to prevent the inner surface from being worn by the passing core fiber bundle.

As shown in (b) of Fig. 5, this load processing section (40) has a structure in which a first internal passage (40a) in the shape of a trumpet is formed to taper so that it becomes narrower toward the exit, and a second internal passage (50b) in the shape of a circle is formed in a straight line at the rear of the first internal passage (40a) and processes a core fiber bundle into a reinforcing bar rod having a predetermined circular cross-sectional shape.

As described above, the rod processing section (40) according to the present invention is composed of a lower body (41) and an upper body (42) that are formed separately, so that when the specification of the processed reinforcing bar rod changes and replacement of the rod processing section (40) is required, the upper body (42) is divided from the lower body (41), and then the reinforcing bar rod that was previously being processed can be removed from the lower body (41), so there is no need to cut the reinforcing bar rod that was previously being processed when replacing the rod processing section (40).

Accordingly, the present invention installs the lower body (41) of the rod processing part (40) to be replaced, places the reinforcing bar rod that was previously being processed on the lower body (41), and then connects the upper body (42) to the lower body (41) so that a reinforcing bar rod with a changed specification can be processed.

That is, the present invention does not require cutting a reinforcing bar rod that was previously being processed in order to replace a previously integrally formed rod processing portion, inserting one side of the cut reinforcing bar rod into the replaced rod processing portion (40), and then connecting one side of the cut reinforcing bar rod to the other side of the cut reinforcing bar rod.

Accordingly, the present invention enables the replacement work of the rod processing section (40) to be performed more quickly when the specifications of the manufactured reinforcing bar are changed, so the work time for replacing the rod processing section (40) is significantly shortened, thereby greatly improving the productivity of the fiber-reinforced composite bent reinforcing bar.

As shown in FIG. 6, the rib forming section (50) spirally winds rib fiber yarn on the outer surface of the reinforcing rod (Ro) discharged from the rod processing section (40) to form a rib (R) on the outer surface of the reinforcing rod (Ro), and includes a rib fiber yarn roving (51), a support member (52), a first tension-addition roller (53), a second tension-addition roller (54), an elastic member (55), an upper ring (56), and a lower ring (57).

The rib fiber roving (51) is a cylindrical shape in which rib fibers (51a) are wound, and is placed on top of the reinforcing bar rod (Ro) discharged from the rod processing section (40) to supply the rib fibers (51a) to the reinforcing bar rod (Ro).

These rib fibers (51a) are wound spirally on the outer surface of the reinforcing rod (Ro) to form a rib (R).

The support (52) provides an area where the rib fiber roving (51) is settled, and also provides an area where the upper end of the elastic member (55) described later is joined.

The first tension adding roller (53) is placed at the bottom of the support (52) and serves to guide and add tension to the rib fiber yarn (51a) supplied from the rib fiber yarn roving (51).

The second tension adding roller (54) is placed at the rear upper portion of the first tension adding roller (54) and, together with the first tension adding roller (54), serves to guide the rib fiber yarn (51a) and also add tension.

That is, the rib fiber (51a) is arranged to be supplied to the reinforcing bar rod (Ro) through the lower part of the first tension-adding roller (53) and the upper part of the second tension-adding roller (54), and thus tension is applied by the first tension-adding roller (53) and the second tension-adding roller (54).

The elastic member (55) has a lower end coupled to the second tension-adding roller (54) and an upper end coupled to one side of the lower portion of the support, and as it applies elastic force to the second tension-adding roller (54) in the direction of the support (52), it serves to apply greater tension to the rib fiber yarn (51a) through the second tension-adding roller (54).

The upper ring (56) and the lower ring (57) are ring-shaped ring members arranged in the vertical direction on one side of the rear surface of the rod processing section (40), and serve to apply additional tension to the rib fiber yarn (51a) by allowing the rib fiber yarn (51a) supplied to the reinforcing rod (Ro) to be wound at least once and then supplied to the reinforcing rod (Ro).

As described above, the rib forming part (50) according to the present invention is supplied to the reinforcing bar rod (Ro) with tension added through the first tension adding roller (53) and the second tension adding roller (54), and additional tension added by the elastic member (55), the upper ring (56), and the lower ring (57), thereby being wound more firmly in close contact with the outer surface of the reinforcing bar rod (Ro).

In particular, the rib forming part (50) according to the present invention uses a rib fiber roving (51) in which a large amount of rib fiber yarn is wound as a rib fiber yarn supply source, and thus, compared to the existing method of using a spool of rib fiber yarn in which a small amount of rib fiber yarn is wound as a rib fiber yarn supply source, the replacement cycle of the rib fiber yarn supply source increases, and thus, productivity can be prevented from being reduced due to frequent replacement of the rib fiber yarn supply source.

Meanwhile, the rib fiber (51a) is generally composed of glass fiber, but is not limited thereto, and may be composed of any one selected from among aramid fiber, carbon fiber, basalt fiber, PVA fiber, and high-strength polyester fiber, or a combination thereof.

The sand application unit (60) serves to apply sand to the outer surface of the reinforcing bar rod discharged to the rear of the rib forming unit (50), and as shown in Fig. 7, includes an adhesive spraying unit (61), a sand spraying unit (62), and an air spraying unit (63).

The adhesive spraying means (61) sprays and applies adhesive to the outer surface of the reinforcing bar rod (Ro) discharged to the rear of the rib forming part (50), and includes an adhesive storage tank (61a) and an adhesive spraying nozzle (61b) that is arranged adjacent to the upper portion of the reinforcing bar rod (Ro) and sprays adhesive to the outer surface of the reinforcing bar rod (Ro).

The sand blasting means (62) is installed at the rear of the adhesive spraying means (61) and serves to spray sand onto the outer surface of the reinforcing bar rod to which adhesive has been applied. The sand blasting means (62) includes a sand storage tank (62a), an air supply tank (62b) that supplies air by controlling the amount of air to the sand storage tank (62a), and a sand blasting nozzle (62c) that is arranged adjacent to the upper and lower portions of the reinforcing bar rod (Ro) and sprays sand onto the outer surface of the reinforcing bar rod (Ro).

The air injection means (63) is installed at the rear of the sand injection means (62) and has the function of removing unbonded sand by injecting air onto the outer surface of the reinforcing bar rod to which sand has been applied. The air injection means (63) includes an air storage tank (63a) and an air injection nozzle (63b) that is arranged adjacent to the upper portion of the reinforcing bar rod (Ro) and injects air onto the outer surface of the reinforcing bar rod (Ro).

As described above, the bond strength of the fiber-reinforced composite bent reinforcing bar manufactured by the present invention is greatly improved by applying sand to the outer surface of the reinforcing bar rod through the sand application portion (60).

As shown in FIG. 1, the molding restoration part (70) is installed in front of the first hardening part (85) and acts to restore the cross-sectional shape of each reinforcing bar rod to a circle by applying pressure to the outer surface of a plurality of reinforcing bar rods discharged from the rib molding part (60) before being fed into the first hardening part (85). As shown in FIG. 8, the molding restoration part includes a plurality of lower molding restoration rollers (71) and a plurality of upper molding restoration rollers (72).

The lower molding restoration roller (71) has a hemispherical lower groove (71a) formed along the outer surface corresponding to the outer surface of the reinforcing bar rod.

The upper molding restoration roller (72) is configured to include a plurality of upper molding restoration rollers (72) having a hemispherical upper groove (72a) formed along the outer surface corresponding to the outer surface of the reinforcing bar rod.

The above-mentioned molding restoration part (70) is formed so that the lower groove (71a) formed in the lower molding restoration roller (71) and the upper groove (72a) formed in the upper molding restoration roller (72) surround the outer surface of the reinforcing bar rod, thereby restoring the cross-sectional shape of the reinforcing bar rod passing through it to a preset circle, thereby preventing the occurrence of defects in the reinforcing bar rod.

The first hardening unit (80) is installed at the rear of the molding restoration unit (70) and irradiates the reinforcing bar rod discharged from the molding restoration unit (70) with near-infrared or ultraviolet rays to promote the hardening reaction of the resin constituting the reinforcing bar rod, thereby hardening the surface of the reinforcing bar rod.

In the surface hardening process of the reinforcing bar rod through the first hardening section (80) as described above, the resin impregnated in the reinforcing bar rod spreads to and impregnates the rib fiber yarn, thereby hardening the surface of the reinforcing bar rod and the rib fiber yarn as one.

Meanwhile, if the resin impregnated in the reinforcing bar rod is a thermosetting resin containing a hardener, a cooling tank may be additionally installed at the rear of the first hardening section (80) to cool the reinforcing bar rod in order to prevent the center of the reinforcing bar rod heated by near-infrared rays from being completely hardened.

The rod winding unit (90) forms a bent reinforcing bar by bending and winding the reinforcing bar discharged from the first hardening unit (85) into a predetermined shape, and as shown in FIGS. 9 and 10, it comprises a winding frame (91), a support frame (92), a power means (93), a pinion gear (94), and an elevating means (95).

The winding frame (91) includes a body (91a) having a rectangular cross-section shape including a pair of support plates (91aa) spaced apart at a predetermined interval and a support member (91ab) whose ends are respectively connected to the four corners of the pair of support plates (91aa), and a pair of rotation shafts (91b) each protruding from both sides of the outer surface of the pair of support plates (91aa), and serves to form a bent reinforcing bar by winding a reinforcing bar rod discharged in a straight shape by bending it to have a predetermined shape.

In this embodiment, the body (91a) of the winding frame (91) is formed to have a rectangular cross-section as an example, but the present invention is not limited thereto, and may be formed to have a circular or polygonal cross-section shape in various ways depending on the shape of the bent reinforcing bar to be manufactured.

The support frame (92) rotatably supports the winding frame (91) and provides an installation area for the power means (93), and comprises a pair of support plates (92a) having open upper support grooves (92aa) formed at the upper end to support each rotation axis (91b) of the winding frame (91), and a lower plate (92b) connecting the lower ends of the pair of support plates (92a).

The power means (93) includes a driving body (93a) coupled to the side of one of the support plates (92a) and a driving shaft (93b) coupled to one of the rotation shafts (91b) of the winding frame (91), and serves to rotate the winding frame (91) to wind the reinforcing bar rod onto the winding frame (91), and a general motor can be used.

The pinion gear (94) is shaped like a disk and is connected to another rotation shaft (91b) of the winding frame (91), and has a plurality of teeth (94a) formed along the outer surface.

This pinion gear (94) rotates along the rack member () of the second hardening portion (95) described later, thereby rotating the winding frame (91) that moves along the longitudinal direction of the second hardening portion (95), thereby allowing the reinforcing bar rod wound on the winding frame (91) to be uniformly hardened.

The lifting means (95) is connected to the lower part of the support frame (92) and functions to raise and lower the support frame (92) in the vertical direction. It can be formed as a general cylinder structure including a cylinder arm (95a) connected to the lower part of the lower plate (92b) and a cylinder body (95b).

After the winding of the reinforcing rod on the winding frame (91) is completed, when the reinforcing rod is cut, as shown in FIG. 10, the lifting means (95) moves the support frame (92) downward to detach the rotation axis (91b) of the winding frame (91) from the support groove (92aa) of the support plate (92a), thereby allowing the winding frame (91) to be transported along the length direction of the hardening tank (95a) via the transport frame (95c) of the second hardening section (95) described later.

The second hardening unit (100) is installed at the rear of the rod winding unit (90), and rotates the winding frame (91) on which the reinforcing rod has been wound, while simultaneously moving it in one direction, irradiating the reinforcing rod wound on the winding frame (91) with near-infrared rays or ultraviolet rays to promote the hardening reaction, thereby completely hardening the reinforcing rod. As shown in FIGS. 9 and 10, the second hardening unit comprises a hardening tank (100a), a transfer rail (100b), a transfer frame (100c), and a rack member (100d).

The hardening tank (100a) has a body shape with the front and back open, and light sources (100aa) that irradiate near-infrared or ultraviolet rays are installed on the inner upper surface spaced at a certain interval along the length direction.

The transfer rail (100b) provides an area in which the transfer frame (100c) described below is installed to be movable along the longitudinal direction of the hardening tank (100a), and is arranged at a certain interval on the inner upper side of the hardening tank (100a), with each end extending to the upper side of the load winding part (90).

The transfer frame (100c) has a role of moving the winding frame (91) on which the winding of the reinforcing bar rod is completed along the longitudinal direction of the hardening tank (100a), and is formed with a connecting hole (not shown) formed at each lower end to which a pair of rotation axes (91b) of the winding frame (91) are rotatably connected, and includes a transfer plate (100ca) whose upper end is movably connected to each transfer rail (100b).

Here, a known LM guide structure can be used as the structure in which the upper part of the transfer plate (100ca) and the transfer rail (100b) are movably connected.

The rack member (100d) is installed along the length direction of the hardening tank (100a) on one side of the inner surface of the hardening tank (100a) corresponding to the pinion gear (94) of the load winding unit (90), and has teeth formed on the upper surface that are engaged with the teeth of the pinion gear (94).

These rack members (100d) rotate the winding frame (91) in one direction, which is transported along the longitudinal direction of the hardening tank (100a) through the transport frame (100c), by interaction with the pinion gear (94) installed on the rotational axis (91b) of the winding frame (91), so that near-infrared rays or ultraviolet rays are evenly irradiated to the reinforcing bar rods wound on the winding frame (91), thereby allowing the reinforcing bar rods wound on the winding frame (91) to be evenly hardened overall.

As described above, the present invention can continuously transport the winding frame (91) on which the reinforcing bar rod is wound to the second hardening unit (100) through a structure in which the rod winding unit (90) can be moved up and down and a transport frame (100c) for transporting the winding frame (91) on which the reinforcing bar rod is wound is installed so as to be movable to the upper part of the rod winding unit (90). Therefore, a separate work process for feeding the winding frame (91) on which the reinforcing bar rod is wound to the second hardening unit (100) is not required, and thus the productivity of the product is greatly improved.

FIG. 11 illustrates a state in which a reinforcing bar rod is wound around a winding frame having various cross-sectional shapes of a fiber-reinforced composite bent reinforcing bar manufacturing device according to one embodiment of the present invention, and FIG. 12 illustrates various shapes of bent reinforcing bars manufactured through a fiber-reinforced composite bent reinforcing bar manufacturing device according to one embodiment of the present invention.

According to one embodiment of the present invention, a device for manufacturing a fiber-reinforced composite bent reinforcing bar can form a winding frame (91) on which a reinforcing bar rod (Ro) is wound, to have various cross-sectional shapes including circular, elliptical, and polygonal, as shown in (a) to (d) of FIG. 11, depending on the purpose of the bent reinforcing bar being manufactured.

Accordingly, the present invention can manufacture fiber-reinforced composite bent reinforcing bars having various shapes, as shown in (a) to (f) of FIG. 12, by cutting reinforcing rods (Ro) wound on a winding frame (91) having various cross-sectional shapes at appropriate locations as needed.

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

1: Fiber-reinforced composite bent reinforcement bar manufacturing device
10: Core fiber supply section 11: Shelf frame
12: Core fiber roving 12a: Core fiber roving
20: Core fiber alignment section 21a: Coating layer
21aa: Insertion groove 21b: Heating means
30: Resin impregnation section 40: Rod processing section
41: Lower body 42: Upper body
40a: First inner passage 40b: Second inner passage
50: Rib forming part 51: Rib fiber roving
51a: Rib fiber 52: Support
53: 1st tension adding roller 54: 2nd tension adding roller
55: Elastic member 56: Upper ring
57: Lower ring 60: Sand application part
61: Adhesive spraying means 61a: Adhesive storage tank
61b: Adhesive spray nozzle 62: Sand spray means
62a: Sand storage tank 62b: Air supply tank
62c: Sand blasting nozzle 63: Air blasting means
63a: Air storage tank 63b: Air injection nozzle
70: Mold restoration part 71: Lower mold restoration roller
71a: Lower groove 72: Upper molding restoration roller
72a: Upper groove 80: First hardening section
90: Load winding part 91: Winding frame
91a: Body 91aa: Support plate
91ab: Support 91b: Rotation axis
92: Support frame 92a: Support plate
92b: Lower plate 93: Power means
93a: Drive body 93b: Drive shaft
94: Pinion gear 95: Elevator
95a: Cylinder arm 95b: Cylinder body
100: 2nd hardening section 100a: Hardening tank
100aa: Light source 100b: Transport rail
100c: transfer frame 100ca: transfer plate
100d : Rack member

Claims (11)

A core fiber yarn supply section comprising a plurality of core fiber yarn rovings each having core fiber yarns wound therein for manufacturing a fiber-reinforced composite bent reinforcing bar;
A core fiber alignment unit that aligns each core fiber supplied from the core fiber supply unit so that it is spaced apart in the transverse direction and also applies tension to the core fiber;
A resin impregnation unit for impregnating each core fiber supplied from the core fiber alignment unit with resin;
At least one rod processing section for processing a reinforcing bar rod having a preset cross-sectional shape by drawing and forming the bundles of core fiber yarns impregnated with resin into bundles;
A rib forming section for forming a rib on the outer surface of the reinforcing bar rod by spirally winding rib fiber yarn on the outer surface of the reinforcing bar rod discharged from the above load processing section;
A first hardening section that hardens the surface of the reinforcing bar rod by irradiating near-infrared or ultraviolet rays to the reinforcing bar rod on which the ribs are formed to promote a hardening reaction;
At least one rod winding section including a winding frame for winding the reinforcing bar rod whose surface has been hardened through the first hardening section to form a bent reinforcing bar;
A second hardening section is included, which simultaneously rotates the winding frame in which the winding of the reinforcing bar rod is completed and moves in one direction, and irradiates near-infrared rays or ultraviolet rays to the reinforcing bar rod wound on the winding frame to promote a hardening reaction, thereby completely hardening the reinforcing bar rod.
The above core fiber alignment part
A fiber-reinforced composite bent reinforcing bar manufacturing device, comprising: a plurality of guide bars, each of which is spaced apart from one another along the supply direction of the core fiber yarns, each having a plurality of guide grooves formed on one side of an outer peripheral surface spaced apart at a predetermined interval along the longitudinal direction, into which the core fiber yarns are inserted along the outer peripheral direction, and having a heating means installed inside along the longitudinal direction; wherein the core fiber yarns are arranged to alternately pass through the upper and lower portions of the outer peripheral surfaces of neighboring guide bars.
delete delete In the first paragraph,
The above load processing section
An internal passage is formed in a tapered manner so as to become narrower toward the exit, and a second internal passage is formed in a straight line at the rear of the first internal passage and processes the core fiber bundle into a reinforcing bar having a preset cross-sectional shape, and is sequentially formed.
A fiber-reinforced composite bent reinforcement bar manufacturing device characterized in that a lower body and an upper body formed to be mutually separable are mutually joined to form the internal passage.
In the first paragraph,
The above rib forming part
A rib fiber roving having rib fibers wound on the outer surface and supplying the rib fibers to the outer surface of the reinforcing bar rod;
A support on which the above rib fiber roving is settled;
A first tension adding roller and a second tension adding roller are installed at the lower part of the above support and are arranged sequentially along the discharge direction of the reinforcing bar rod;
An elastic member connected between the support member and the second tension adding roller and providing elastic restoring force to the second tension adding roller in the direction of the support member;
Including an upper ring and a lower ring arranged in the vertical direction on one side of the above load processing section,
A fiber-reinforced composite bent reinforcing bar manufacturing device characterized in that the rib fiber yarn passes through the lower part of the first tension-adding roller and the upper part of the second tension-adding roller, is wound at least once around each of the upper ring and the lower ring, and then is supplied to the outer surface of the reinforcing bar rod.
In the first paragraph,
An adhesive spraying means for spraying and applying adhesive to the outer surface of the reinforcing bar rod discharged from the rib forming part;
A sand blasting means for spraying sand onto the outer surface of the reinforcing bar rod to which the adhesive has been applied;
A fiber-reinforced composite bent reinforcing bar manufacturing device characterized in that it further includes a sand application unit including an air injection means for removing unbonded sand by injecting air onto the outer surface of the reinforcing bar rod to which the sand has been applied.
In the first paragraph,
Further comprising a forming restoration part that pressurizes the outer surface of the reinforcing bar rod discharged from the rib forming part to restore the reinforcing bar rod to a preset cross-sectional shape,
The above plastic surgery restoration part
It includes a lower forming restoration roller having a lower groove formed along the outer surface corresponding to the outer surface of the reinforcing bar rod, and an upper forming restoration roller installed on the upper side of the lower forming restoration roller and having an upper groove formed along the outer surface corresponding to the outer surface of the reinforcing bar rod,
A fiber-reinforced composite bent reinforcing bar manufacturing device, characterized in that the lower groove and the upper groove are formed to surround the outer surface of the reinforcing bar rod.
In the first paragraph,
A device for manufacturing a fiber-reinforced composite bent reinforcing bar, characterized in that the above-mentioned winding frame is formed in any one shape selected from the cross-sectional shapes of a circle, an ellipse, or a polygon.
In Article 8,
The above load winding part
A winding frame including a body having a cross-sectional shape selected from among circular, elliptical, or polygonal shapes, and a pair of rotational axes protruding from both sides of the body;
A support frame including a pair of support plates each having an open upper support groove formed therein to support each rotation axis;
A power means coupled to one side of the above support frame, the driving shaft being coupled to one of the rotational shafts;
A pinion gear coupled to another rotational axis of the above winding frame and having a plurality of teeth formed along the outer surface;
A fiber-reinforced composite bent reinforcement bar manufacturing device characterized by including an elevating means coupled to the lower portion of the support frame and elevating the support frame in the vertical direction.
In Article 9,
The above second hardening part
A curing tank having a light source installed therein that irradiates near-infrared or ultraviolet rays along the length thereof;
A pair of transfer rails arranged at a set interval on the inner upper portion of the hardening tank and installed along the longitudinal direction of the hardening tank, each end of which extends to the upper portion of the load winding section;
A transport frame, wherein one side of the upper part is installed so as to be movable along the pair of transport rails, and one side of the lower part is rotatably coupled with the pair of rotation axes, and when the support frame moves downward and the rotation axes are separated from the support groove, the transport frame transports the winding frame along the longitudinal direction of the hardening tank;
A fiber-reinforced composite bent reinforcing bar manufacturing device characterized by including a rack member installed along the longitudinal direction of the hardening tank on one side of the inner surface of the hardening tank corresponding to the pinion gear, and having teeth formed on the upper surface that are gear-engaged with the teeth of the pinion gear.





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