CN115369542A

CN115369542A - Woven fiber reinforcing bar with threads and weaving method

Info

Publication number: CN115369542A
Application number: CN202211041236.0A
Authority: CN
Inventors: 李昕; 李锡放; 何慧珊; 彭琪帜
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-22
Anticipated expiration: 2042-08-29
Also published as: CN115369542B

Abstract

The invention discloses a woven fiber reinforced rib with threads and a weaving method, and relates to the technical field of fiber reinforced rib materials, wherein the woven fiber reinforced rib with threads comprises a reinforced rib body, the reinforced rib body comprises an inner core part, the inner core part comprises a plurality of core tows, and the direction of the core tows is consistent with the axial direction of the reinforced rib body; the warp part comprises a plurality of warp tows, the warp tows are uniformly and densely distributed and arranged on the periphery of the inner core part, and the direction of the warp tows is consistent with the axial direction of the reinforcing rib body; and the weft yarn part comprises at least one weft yarn bundle, the weft yarn bundles are spirally distributed along the peripheral circumference of the inner core part, the weft yarn bundles are interwoven with the warp yarn bundles to form a compact woven interweaving structure, and the compact woven interweaving structure forms a spiral thread convex part and a spiral thread concave part. The invention makes the screw thread which is beneficial to anchoring, and simultaneously improves the transverse strength and the shear strength of the reinforcement bar body.

Description

Woven fiber reinforcing bar with threads and weaving method

Technical Field

The invention relates to the technical field of fiber reinforced rib materials, in particular to a woven fiber reinforced rib with threads and a weaving method of the woven fiber reinforced rib with threads.

Background

The fiber reinforced bar, also called FRP bar, can replace steel bar for building engineering due to its advantages of light weight, high tensile strength, corrosion resistance, no metal fatigue, etc. The existing FRP bars are all pultrusion bars, reinforcing fibers of the existing FRP bars are distributed in the axial direction, the tensile strength is good, but the transverse anti-extrusion capability and the transverse anti-shearing strength are poor. In addition, the surface of the pulling agent rib is smooth and has no bulge, and the bonding force bearing capacity with the grouting material in a building is poor; no screw thread, and inconvenient anchoring in prestress.

The Chinese patent document (application number 200780052722.X, the name of the invention is a fiber reinforced bar) well analyzes the importance of a threaded bar and indicates the defects of two threads in the prior art: (1) The thread is processed by a mechanical processing method, so that the reinforcing fiber is cut off, and the strength is poor; (2) Type, molded plastic threads, are also weak. The solution of this patent is to bundle the middle longitudinal fibers with two bundles of helically cross-wound fibers such that "a portion of the longitudinal fibers between each wound fiber tape is squeezed and protrudes outward".

It is known that bulky elastic cotton and wool fiber bundles produce such a bulging effect after binding; reinforcing fibers such as carbon fibers, glass fibers and basalt fibers are not projected at all, and particularly, are in a state where longitudinal fibers are strained. In addition, the above patent specification also states that "normally the wound fibres can be spaced about 1 to 3 inches apart in each direction", which is a dimension that is clearly large as the pitch of the thread, and in view of this, the solution proposed by this patent does not solve the technical problem "there is a need in the mining, construction and other industries for a composite bar and nut fastening system having full thread characteristics without the drawbacks of types (1) and (2) described in the above paragraph".

Disclosure of Invention

The present invention aims to solve at least to some extent one of the above-mentioned technical problems of the prior art. Therefore, the embodiment of the invention provides a woven fiber reinforcing bar with threads, which is beneficial to anchoring and can improve transverse strength and shear strength.

The embodiment of the invention also provides a weaving method of the woven fiber reinforced rib with the threads.

According to an embodiment of a first aspect of the present invention, there is provided a threaded woven fiber tendon comprising a tendon body including an inner core portion comprising a plurality of core tows oriented in a direction axially of the tendon body; the warp yarn part comprises a plurality of warp yarn tows, the warp yarn tows are uniformly and densely distributed and arranged on the periphery of the inner core part, and the direction of the warp yarn tows is consistent with the axial direction of the reinforcing rib body; and the weft yarn part comprises at least one weft yarn bundle, the weft yarn bundles are spirally distributed along the peripheral circumference of the inner core part, the weft yarn bundles are interwoven with the warp yarn bundles to form a compact woven interweaving structure, and the compact woven interweaving structure forms spiral thread convex parts and spiral thread concave parts.

The woven fiber reinforced rib has at least the following beneficial effects: the surface of the reinforcement rib body is made into a compact woven and interwoven structure formed by interweaving warp yarn tows and weft yarn tows, and the compact woven and interwoven structure forms spiral thread convex parts and thread concave parts, so that the combination bearing force with the grouting material can be effectively improved. And because there is continuous and the reinforcing fiber that combines closely with the reinforcing bar body fiber interweaves and forms, can bear very large pulling force, can be used for the prestressed anchorage of the reinforcing bar body, because there is the fiber distribution of circumferential winding at the same time, have improved the transverse strength and shear strength of the reinforcing bar body.

According to an embodiment of the first aspect of the present invention, the core tows, the warp tows and the weft tows adopt high performance composite material fibers, and the high performance composite material fibers are one or a mixture of more of carbon fibers, glass fibers, basalt fibers, aramid fibers, ultra-high molecular weight polyethylene fibers, quartz fibers, ceramic fibers and metal fibers.

According to an embodiment of the first aspect of the present invention, the core tows, the warp tows and the weft tows adopt high performance composite material fibers, and the high performance composite material fibers are one or more of mixed raw silk, woven processing tows and braided processing tows.

According to an embodiment of the first aspect of the present invention, the tightly woven interweaving weave is one or more of plain weave, twill weave and satin weave, and other required weaves can also be adopted.

According to one embodiment of the first aspect of the present invention, the weft yarn bundle is one, the weft yarn bundle is a first weft yarn bundle, the first weft yarn bundle forms the close woven interweaving structure by interweaving with the warp yarn bundle, the first weft yarn bundle and the interweaved warp yarn bundle form the thread convex part, and the warp yarn bundle between two adjacent thread convex parts forms the thread concave part. Furthermore, the warp yarn tows adopt tows with flat sections, and the first weft yarn tows adopt tows with round sections.

According to another embodiment of the first aspect of the present invention, the number of the weft tows is two, the two weft tows are respectively a first weft tow and a second weft tow, and the first weft tow and the second weft tow are spirally distributed along the peripheral circumference of the inner core part in a staggered manner to form the tight woven interweaving structure; the first weft yarn tows are interwoven with the warp yarn tows to form the thread crests; the second weft yarn tows are interwoven with the warp yarn tows to form the thread concave portion, further, the warp yarn tows adopt tows with flat sections, the first weft yarn tows adopt tows with round sections, and the second weft yarn tows adopt tows with flat sections.

According to an embodiment of the second aspect of the present invention, there is provided a method for weaving a threaded woven fiber reinforcement bar, for weaving a threaded woven fiber reinforcement bar according to an embodiment of the first aspect of the present invention, comprising the steps of:

s1, operating a machine: the core tows and the warp tows adopt creels with tension control for yarn supply, the creels are uniformly distributed along the circumference, the core tows are directly led into the fabric traction device for fixation, and the warp tows pass through heddle eyelets of heddles controlled by the electronic jacquard shedding device and are led into the fabric traction device for fixation; more than two independently-driven electronic jacquard opening devices are uniformly distributed along the circumference, so that more than two subarea openings can be realized; the first weft yarn bundle is wound on a quill and is placed into a shuttle, the shuttle is a shuttle car capable of moving on a shuttle channel, and the shuttle is placed on the partition edge on the shuttle channel;

s2, starting up: the loom realizes the opening, weft insertion, closing, beating-up and traction of subareas in sequence; at the top view angle of the loom, the shuttle moves anticlockwise to weave a positive thread or clockwise to weave a negative thread;

s3, the movement of the fabric traction device and the shuttle is matched: the shuttle completes a circle, and the fabric traction device completes the traction amount of a pitch d;

and S4, circularly executing the step S2.

The weaving method of the woven fiber reinforced rib with the threads at least has the following beneficial effects: the weaving fiber reinforced rib with one weft yarn interwoven thread can be woven by weaving one weft yarn through single-shuttle weaving, the interweaving of the weft yarn tows and the warp yarn tows not only forms spiral thread convex parts and thread concave parts, but also improves the transverse strength and the shear strength of the rib due to the distribution of circumferential fibers.

According to an embodiment of the third aspect of the present invention, there is provided a method for weaving a threaded woven fiber reinforcement bar, for weaving a threaded woven fiber reinforcement bar according to an embodiment of the first aspect of the present invention, comprising the steps of:

s1, operating a machine: the core tows and the warp tows adopt creels with tension control for yarn supply, the creels are uniformly distributed along the circumference, the core tows are directly led into the fabric traction device for fixation, and the warp tows pass through heddle eyelets of heddles controlled by the electronic jacquard shedding device and are led into the fabric traction device for fixation; more than four electronic jacquard opening devices which can be independently driven are uniformly distributed along the circumference, so that more than four partition openings with even numbers can be realized; the first weft yarn bundle is wound on a first quill and placed into a first shuttle, and the first shuttle is a shuttle car capable of moving on a shuttle channel; the second weft yarn bundle is wound on a second quill and placed into a second shuttle, and the second shuttle is a shuttle car capable of moving on the shuttle channel; the first shuttle and the second shuttle are respectively arranged on two opposite subarea edges on the shuttle track, and the subareas on which the first shuttle is arranged and the subareas on which the second shuttle is arranged are circumferentially 180 degrees out of phase;

s2, starting up: the loom realizes the opening, weft insertion, closing, beating-up and traction of subareas in sequence; at the top view of the weaving machine, the first shuttle and the second shuttle move anticlockwise to weave a positive thread or clockwise to weave a negative thread;

s3, the fabric traction device is matched with the first shuttle and the second shuttle in motion: the first shuttle or the second shuttle completes a circumference, and the fabric traction device completes the traction amount of a thread pitch d;

and S4, circularly executing the step S2.

The weaving method of the woven fiber reinforced rib with the threads at least has the following beneficial effects: by carrying out double-shuttle weaving on two weft yarn tows, the two weft yarn tows need the first shuttle and the second shuttle to run simultaneously, the phase difference of the double-shuttle is 180 degrees, the woven fiber reinforced rib with the interweaved threads of the two weft yarn tows can be woven, the interweaving of the weft yarn tows and the warp yarn tows not only forms spiral thread convex parts and spiral thread concave parts, but also improves the transverse strength and the shear strength of the rib due to the distribution of circumferential fibers.

Drawings

The invention is further described below with reference to the drawings and examples;

FIG. 1 is a perspective view of a first construction of a threaded woven fiber reinforcement bar in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of a circular loom in single-shuttle weaving;

FIG. 3 is a timing diagram for a single shuttle four-partition aperture;

FIG. 4 is a perspective view of a second construction of a threaded woven fiber reinforcement bar in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of a circular loom in a double-shuttle weaving process;

FIG. 6 is a timing diagram for a dual shuttle run octant aperture.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, preferred embodiments of which are illustrated in the accompanying drawings, wherein the drawings are provided for the purpose of visually supplementing the description in the specification and so forth, and which are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 and 4, there is shown a threaded woven fiber reinforcement bar comprising a reinforcement bar body including an inner core portion, a warp yarn portion, and a weft yarn portion.

The inner core portion includes a plurality of core tows 111, the core tows 111 being oriented in the axial direction of the reinforcement bar body.

The warp yarn part comprises a plurality of warp yarn bundles 121, the warp yarn bundles 121 are uniformly densely distributed and arranged on the periphery of the inner core part, and the trend of the warp yarn bundles 121 is consistent with the axial direction of the reinforcing rib body.

The weft yarn part comprises at least one weft yarn bundle, the weft yarn bundles are spirally distributed along the peripheral circumference of the inner core part, the weft yarn bundles are interwoven with the warp yarn bundles 121 to form a tight woven interweaving structure, and the tight woven interweaving structure forms spiral thread convex parts 141 and spiral thread concave parts 142.

As known to those skilled in the art, the conventional manufacturing method of the woven fiber reinforcement bar generally comprises "fiber preform manufacturing" and "infiltration, filling and curing of the base material", and the embodiment is mainly modified with respect to the "fiber preform manufacturing" part. The 'infiltration, filling and curing of the base material' part is that the woven fiber reinforced bar is infiltrated, filled and cured by the base material to obtain the reinforced bar with screw threads, wherein the base material is one or a mixture of a polymer material, a metal material and a ceramic material.

In some embodiments, the tightly woven weave is a blend of one or more of plain weave, twill weave, satin weave, and other desired weaves may also be used.

The core tows, the warp tows and the weft tows adopt high-performance composite material fibers, and the high-performance composite material fibers are one or a mixture of a plurality of carbon fibers, glass fibers, basalt fibers, aramid fibers, ultra-high molecular weight polyethylene fibers, quartz fibers, ceramic fibers and metal fibers.

It can be understood that in the application, the high-performance composite material fibers such as carbon fibers, glass fibers, basalt fibers and the like have the characteristic of high strength, but the threads are difficult to machine and combine with the grouting material. In the embodiment of the invention, the surface of the reinforcement rib body is provided with a compact woven and interwoven structure of the warp yarn tows 121 and the weft yarn tows, and the compact woven and interwoven structure forms spiral thread convex parts and thread concave parts, so that the combination bearing force with the grouting material can be effectively improved. And because there is continuous and the reinforcing fiber closely bound with reinforcing fiber of body of the bar interweaves to get final product, can bear the very large pulling force, can be used for the prestressed anchorage of the reinforcing bar body, because there is fiber distribution of circumferential winding at the same time, have improved the transverse strength and shear strength of the reinforcing bar body.

The core tows, the warp tows and the weft tows adopt high-performance composite material fibers, and the high-performance composite material fibers are one or a mixture of outgoing precursor yarns, weaving processed tows and weaving processed tows.

Referring to FIG. 1, a first construction of a threaded woven fiber reinforcement bar is shown.

Specifically, the number of the weft yarn bundles is one, the weft yarn bundle is a first weft yarn bundle 131, and the first weft yarn bundle 131 is interwoven with the warp yarn bundle 121 to form a tightly woven and interwoven structure.

The close weave shown in fig. 1 is a plain weave over one and under one, specifically formed by interweaving warp yarn bundles 121 over one and under one with first weft yarn bundles 131; the interweaving of the warp yarn bundles 121 with the first weft yarn bundles 131 together forms thread protrusions 141, and the warp yarn bundles 121 between two adjacent thread protrusions 141 form thread recesses 142. The person skilled in the art can design the specific interlacing of the warp yarn bundles 121 with the first weft yarn bundles 131 when designing the first structure of the threaded woven fiber reinforcement bar.

The warp yarn bundle 121 is a bundle with a flat section, the first weft yarn bundle 131 is a bundle with a circular section, and the shape of the warp yarn bundle 121 and the shape of the first weft yarn bundle 131 are selected to enhance the concave-convex effect of the compact woven and interwoven structure.

In actual weaving, since the warp yarn bundle 121 is woven with a large tension, the fibers tend to be more spread out in the portion of the thread protrusion 141 of the warp yarn bundle 121.

In fig. 1, the left end of the first weft yarn bundle 131 is the starting end, and it can be seen that the weft insertion path is rotated counterclockwise along the circumference, the traction device is axially displaced while weft insertion is performed, and the traction displacement amount of one weft insertion circle is one thread pitch d, so that a positive thread is woven. On the contrary, if the weft insertion path is rotated clockwise, the reverse thread can be woven.

FIG. 2 is a schematic diagram of a circular loom in a single-shuttle weaving mode, and is a top view of the loom. In the figure, four electronic jacquard opening devices 210 are circumferentially distributed, and are numbered counterclockwise, and the four electronic jacquard opening devices 210 are a No. 1 electronic jacquard opening device 211, a No. 2 electronic jacquard opening device 212, a No. 3 electronic jacquard opening device 213 and a No. 4 electronic jacquard opening device 214, respectively. The circumferential angle partition indicating line 251 is divided, the whole circular ring is divided into four opening partitions, the partition numbers of the four opening partitions correspond to those of the electronic jacquard opening devices, namely, the electronic jacquard opening device No. 1 211 corresponds to the partition No. 1, and the rest is analogized.

The electronic jacquard opening devices are all opening devices with independent electric drive, and can realize independent partition opening; although two subareas (namely an opening area and a closed area) can realize alternate and continuous weaving theoretically, the movement of the electronic jacquard opening device from the opening state to the closed state needs time, and four subareas are better in engineering, namely a transition area is arranged between the opening area and the closed area; the partition openings are beneficial to the continuous movement of the shuttle car on the circular shuttle track and can also support the weaving of a plurality of shuttles; for the partition opening and multi-shuttle weaving, see the chinese patent application (application No. 201710225077.2, inventing a wave-type opening device named as a large weaving system).

The axial yarns of the fabric are provided by a creel with tension control, the creel is circumferentially distributed on the periphery of the weaving machine (the creel is not drawn in the figure), the axial yarns of the fabric comprise a core filament bundle 111 and a warp filament bundle 121, the core filament bundle does not participate in interweaving, so the core filament bundle is directly led into a fabric traction device 241 to be fixed, and the warp filament bundle 121 is led into the fabric traction device 241 to be fixed through a heddle eye of a jacquard heddle.

The shuttle track 231 may be a reed-type endless shuttle track 231 on which the shuttle 220 moves, the shuttle 220 being indicated by S in fig. 2, the shuttle 220 typically being a powered shuttle car. The circumferentially distributed axial yarns, including the core yarn bundle 111 and the warp yarn bundle 121, are all gathered and held by the fabric pulling device 241 and pulled and displaced, and since the creel responsible for supplying the yarns is provided with tension control, the tension of the axial yarns is formed between the creel and the fabric pulling device 241. In order to weave high-density fiber ribs, high tension is adopted. The shuttle 220 moves along the circumference of the circular shuttle track 231, so that the weft yarn tows form a winding bundle for the axial yarn tows, and a larger weft yarn tension needs to be maintained to improve the fiber density of the rib.

FIG. 3 is a timing diagram of a four-partition open for single-shuttle operation, with four partitions in sequence from left to right, and partition labels below; the horizontal line at the high position represents an opening area, the horizontal line at the low position represents a closed area, and the horizontal line at the middle position represents a transition area; the left side is an angular sector, e.g., a 0-90 ° sector, the 1 sector is an open sector, and the shuttle 220 is in the 1 sector; and so on. The weaving process with one shuttle movement can be seen from the timing diagram.

With reference to fig. 2 and 3, this embodiment also shows a method for weaving a threaded woven fiber-reinforced rib, which is used for weaving the threaded woven fiber-reinforced rib of the single weft yarn bundle, and includes the following steps:

s1, operating a machine: the core tows 111 and the warp tows 121 are supplied by creels with tension control, the creels are uniformly distributed along the circumference, the core tows 111 are directly led into the fabric traction device 241 to be fixed, and the warp tows 121 pass through heddle eyes of heddles controlled by the electronic jacquard shedding device to be led into the fabric traction device 241 to be fixed;

more than two independently-driven electronic jacquard opening devices 210 are uniformly distributed along the circumference, so that more than two subarea openings can be realized;

the first weft yarn bundle 131 is wound on the quill and inserted into the shuttle 220, the shuttle 220 is a shuttle car capable of moving on the shuttle channel 231, and the shuttle 220 is placed on the partition edge on the shuttle channel 231;

s2, starting up: the loom realizes the opening, weft insertion, closing, beating-up and traction of subareas in sequence; at the top view of the loom, the shuttle 220 moves counterclockwise to weave a positive thread or clockwise to weave a negative thread;

s3, the movement of the fabric pulling device 241 and the shuttle 220 cooperates: the shuttle 220 completes a circle, and the fabric traction device 241 completes the traction amount of a pitch d;

and S4, circularly executing the step S2.

Referring to fig. 4, a second construction of a threaded woven fiber reinforcement bar is shown.

Specifically, the number of the weft yarn tows is two, the two weft yarn tows are respectively a first weft yarn tow 131 and a second weft yarn tow 132, and the two weft yarn tows are spirally distributed along the peripheral circumference of the inner core part in a staggered manner to form a tight woven and interwoven structure.

The first weft yarn bundle 131 is interwoven with the warp yarn bundle to form the thread protrusion 141. As shown in fig. 4, the warp yarn bundle 121 is interwoven with the first weft yarn bundle 131 in a four-over-one-under manner, and the two together form a thread protrusion 141; in other embodiments, the warp yarn bundle 121 can be woven in a five-over-one-bottom manner, a six-over-one-bottom manner, etc., and can also be interwoven with the first weft yarn bundle 131 to form the thread protrusion 141. The warp yarn bundle 121 is a bundle with a flat section, and the first weft yarn bundle 131 is a bundle with a circular section, so that the protruding effect of the thread convex part 141 of the tightly woven interweaving structure can be further enhanced. Of course, the warp yarn bundles 121 and the first weft yarn bundles 131 may adopt bundles with other cross sections, for example, the first weft yarn bundles 131 may adopt bundles with an oval cross section.

The second weft yarn bundle 132 is interwoven with the warp yarn bundles to form the thread recess 142. As in fig. 4, the warp yarn bundle 121 is interwoven with the second weft yarn bundle 132 in a four-over-four fashion, both of which together form a threaded recess 142; in other embodiments, the warp yarn bundle 121 may be woven in a five-next-up, six-next-up, etc. fashion, as well as being interwoven with the second weft yarn bundle 132 to form the threaded recess 142. The warp yarn bundle 121 is a bundle having a flat cross section, and the second weft yarn bundle 132 is a bundle having a flat cross section, so that the recess effect of the thread recess 142 of the tight woven weave can be further enhanced.

The threaded woven fiber reinforcement bars of the two structures described above are compared as follows:

in the threaded woven fiber reinforcing rib with double weft yarn tows, the arrangement of the two weft yarn tows has the following purposes: in the threaded recess, the force pressing the warp yarn bundle downward (i.e., toward the inside) can be formed by winding with the second weft yarn bundle, and is a holding force, and a flat recess can be obtained.

In the woven fiber reinforcing bar with threads of one weft yarn bundle, the thread concave part is formed by crossing inclined warp yarn bundles, and when the warp yarn bundles are tensioned axially, the inclined warp yarn bundles have upward (namely, outward) force which is separating force and is not good. The thread relief ratio is not large because the higher the thread crests, the more inclined the warp yarn bundles at the thread troughs and the higher.

The weaving scheme of two weft yarn tows is adopted, so that the woven thread has better external force bearing characteristic, but has higher requirements on weaving equipment and weaving process, and eight electronic jacquard opening devices which are independently driven are preferably used for realizing circumferential eight-partition opening, so that two shuttles can be simultaneously accommodated to continuously run to weave the woven threads of the two weft yarn tows.

Specifically, as shown in fig. 4, the left ends of the first weft yarn bundle 131 and the second weft yarn bundle 132 are starting ends, and it can be seen that the weft insertion path is rotated counterclockwise along the circumference, the traction device is axially displaced while weft insertion is performed, and the traction displacement amount during weft insertion one circle is one thread pitch d, so that positive threads are woven. Conversely, if the weft insertion path is rotated clockwise, a reverse thread can be woven. The second weft yarn bundle 132 is spaced from the first weft yarn bundle 131 by half a pitch, and for a circularly moving shuttle, the phase of the circumference is 180 degrees different by half a pitch, so that the two shuttles always run in opposite side divisions (180 degrees apart) during weaving.

FIG. 5 is a schematic diagram of a circular loom in a top view. In the figure, eight electronic jacquard opening devices 210 are circumferentially distributed, and the numbering sequence is counterclockwise, and the eight electronic jacquard opening devices 210 are a No. 1 electronic jacquard opening device 211, a No. 2 electronic jacquard opening device 212, a No. 3 electronic jacquard opening device 213, a No. 4 electronic jacquard opening device 214, a No. 5 electronic jacquard opening device 215, a No. 6 electronic jacquard opening device 216, a No. 7 electronic jacquard opening device 217, and a No. 8 electronic jacquard opening device 218, respectively. The circumferential angle partition indicating line 251 is divided, the whole circular ring is divided into eight opening partitions, the partition numbers of the eight opening partitions correspond to the electronic jacquard opening devices, namely, the electronic jacquard opening device No. 1 211 corresponds to the partition 1, and the rest is analogized.

The electronic jacquard opening devices are all opening devices with independent electric drive, and can realize independent partition opening; the axial yarns of the fabric are provided by a creel with tension control, the creel is circumferentially distributed on the periphery of a weaving machine (not shown in the figure), the axial yarns of the fabric comprise a core tow 111 and a warp tow 121, the core tow does not participate in interweaving and is directly led into a fabric traction device 241 for fixing, and the warp tow 121 is led into the fabric traction device 241 for fixing through heddle eyes of a jacquard heddle.

The shuttle path 231 may be a reed-type annular shuttle path, the first shuttle 221 and the second shuttle 222 move on the shuttle path 231, the first shuttle 221 is denoted by S1 in fig. 5, the second shuttle 222 is denoted by S2, and the first shuttle 221 and the second shuttle 222 are powered shuttle cars respectively. In fig. 5, the first shuttle 221 is on the 1-division edge, the second shuttle 222 is on the 5-division edge, and the first shuttle 221 and the second shuttle 222 are on the opposite side division and are 180 degrees out of phase. For example, no. 5,1 electronic jacquard opening device 211 corresponds to partition 1, and No. 5 electronic jacquard opening device 215 corresponds to partition 5.

The circumferentially distributed axial yarns, including the core yarn bundle 111 and the warp yarn bundle 121, are all gathered and held by the fabric pulling device 241 and pulled and displaced, and since the creel responsible for supplying the yarns is provided with tension control, the tension of the axial yarns is formed between the creel and the fabric pulling device 241. In order to weave high-density fiber ribs, large tension is adopted. The first shuttle 221 and the second shuttle 222 move circumferentially along the annular shuttle track 231.

FIG. 6 is a schematic view of an eight-zone opening for dual shuttle operation, with eight zones in sequence from left to right, and zone numbers below; the horizontal line at the high position represents an opening area, the horizontal line at the low position represents a closed area, and the horizontal line at the middle position represents a transition area; the left side is an angular sector, e.g., 0-45 ° sector, 1 sector and 5 sectors are open sectors, the first shuttle 221 is in sector 1, the second shuttle 222 is in sector 5; and so on. The weaving process with one double shuttle movement can be seen from the timing diagram.

With reference to fig. 5 and 6, this embodiment further shows a method for weaving a threaded woven fiber-reinforced rib, which is used for weaving the threaded woven fiber-reinforced rib with two weft tows, and includes the following steps:

s1, operating a machine: the core tows 111 and the warp tows 121 are supplied by creels with tension control, the creels are uniformly distributed along the circumference, the core tows 111 are directly led into the fabric traction device 241 to be fixed, and the warp tows 121 pass through heddle eyes of heddles controlled by the electronic jacquard shedding device to be led into the fabric traction device 241 to be fixed; more than four even-numbered independently-driven electronic jacquard opening devices 210 are uniformly distributed along the circumference, so that more than four even-numbered partition openings can be realized; the first weft yarn bundle 131 is wound on a first quill and placed into a first shuttle 221, and the first shuttle 221 is a shuttle car capable of moving on a shuttle channel; the second weft yarn bundle 132 is wound on the second quill and placed into the second shuttle 222, and the second shuttle 222 is a shuttle car capable of moving on the shuttle channel 231; the first shuttle 221 and the second shuttle 222 are respectively arranged on two opposite zone edges on the shuttle track, the circumference of the zone for arranging the first shuttle and the zone for arranging the second shuttle are 180 degrees out of phase, and referring to fig. 5 and 6, the first shuttle 221 is arranged on the 1-zone edge, and the second shuttle 222 is arranged on the 5-zone edge;

s2, starting up: the loom realizes the opening, weft insertion, closing, beating-up and traction of subareas in sequence; in the top view of the loom, the first shuttle 221 and the second shuttle 222 move counterclockwise to weave a positive thread or clockwise to weave a negative thread;

s3, the fabric dragging device 241 cooperates with the movement of the first shuttle 221 and the second shuttle 222: the first shuttle 221 and the second shuttle 222 complete a circle, and the fabric traction device 241 completes the traction amount of one pitch d;

and S4, circularly executing the step S2.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A threaded woven fiber reinforcement bar characterized by: comprises a reinforcing bar body, the reinforcing bar body comprises

An inner core portion comprising a plurality of core tows, the core tows oriented in a direction axially of the rebar body;

the warp yarn part comprises a plurality of warp yarn tows, the warp yarn tows are uniformly and densely distributed on the periphery of the inner core part, and the direction of the warp yarn tows is consistent with the axial direction of the reinforcing rib body; and

the weft yarn part comprises at least one weft yarn bundle, the weft yarn bundle is spirally distributed along the peripheral circumference of the inner core part, the weft yarn bundle is interwoven with the warp yarn bundle to form a tight woven interweaving structure, and the tight woven interweaving structure forms spiral thread convex parts and spiral thread concave parts.

2. A threaded woven fiber reinforcement bar according to claim 1, wherein: the core tows, the warp tows and the weft tows are made of high-performance composite material fibers, and the high-performance composite material fibers are one or a mixture of multiple of carbon fibers, glass fibers, basalt fibers, aramid fibers, ultrahigh molecular weight polyethylene fibers, quartz fibers, ceramic fibers and metal fibers.

3. A threaded woven fiber reinforcement bar according to claim 1, wherein: the core tows, the warp tows and the weft tows adopt high-performance composite material fibers, and the high-performance composite material fibers are one or a mixture of outgoing raw yarns, weaving processed tows and weaving processed tows.

4. A threaded woven fiber reinforcement bar according to claim 1, wherein: the close weaving interweaving weave is one or a mixture of plain weave, twill weave and satin weave.

5. A threaded woven fiber reinforcement bar according to any one of claims 1 to 4, wherein: the thread forming structure comprises a plurality of thread bundles, wherein each thread bundle is a first weft yarn bundle, the first weft yarn bundle is interwoven with the corresponding warp yarn bundle to form the compact woven and interwoven structure, the thread protrusions are formed by the first weft yarn bundle and the interwoven warp yarn bundles, and the thread recesses are formed by the warp yarn bundles between every two adjacent thread protrusions.

6. A threaded woven fiber reinforcement bar according to claim 5, wherein: the warp yarn tows adopt tows with flat sections, and the first weft yarn tows adopt tows with round sections.

7. A threaded woven fiber reinforcement bar according to any one of claims 1 to 4, wherein: the number of the weft yarn tows is two, the two weft yarn tows are respectively a first weft yarn tow and a second weft yarn tow, and the first weft yarn tow and the second weft yarn tow are spirally distributed along the peripheral circumference of the inner core part in a staggered mode to form the compact woven and interwoven structure;

the first weft yarn tows are interwoven with the warp yarn tows to form the thread crests;

the second weft yarn tows are interwoven with the warp yarn tows to form the threaded recess.

8. A threaded woven fiber reinforcement bar according to claim 7, wherein: the warp yarn tows adopt tows with flat sections, the first weft yarn tows adopt tows with round sections, and the second weft yarn tows adopt tows with flat sections.

9. A method of weaving a threaded woven fiber reinforcement bar for weaving a threaded woven fiber reinforcement bar according to claim 5 or 6, comprising the steps of:

s1, operating a machine: the core tows and the warp tows adopt creels with tension control for yarn supply, the creels are uniformly distributed along the circumference, the core tows are directly led into the fabric traction device for fixation, and the warp tows pass through heddle eyelets of heddles controlled by the electronic jacquard shedding device and are led into the fabric traction device for fixation;

more than two independently-driven electronic jacquard opening devices are uniformly distributed along the circumference, so that more than two subarea openings can be realized;

the first weft yarn bundle is wound on a quill and is placed into a shuttle, the shuttle is a shuttle car capable of moving on a shuttle channel, and the shuttle is placed on the partition edge on the shuttle channel;

s2, starting up: the loom realizes the opening, weft insertion, closing, beating-up and traction of subareas in sequence; in the top view of the loom, the shuttle moves anticlockwise to weave a positive thread or clockwise to weave a negative thread;

and S4, circularly executing the step S2.

10. A method of weaving a threaded woven fiber reinforcement bar according to claim 7 or 8, comprising the steps of:

s3, the fabric traction device is matched with the first shuttle and the second shuttle in movement: the first shuttle or the second shuttle completes a circle, and the fabric traction device completes the traction amount of a thread pitch d;

and S4, circularly executing the step S2.