CN114214856B - Method for manufacturing composite steel strand - Google Patents
Method for manufacturing composite steel strand Download PDFInfo
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- CN114214856B CN114214856B CN202111282033.6A CN202111282033A CN114214856B CN 114214856 B CN114214856 B CN 114214856B CN 202111282033 A CN202111282033 A CN 202111282033A CN 114214856 B CN114214856 B CN 114214856B
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
- D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2066—Cores characterised by the materials used
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3007—Carbon
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/203—Bridges
Abstract
The invention relates to a manufacturing method of a composite steel strand, and belongs to the technical field of bridge inhaul cables. The method comprises the following steps: manufacturing a carbon fiber bar, conveying carbon fiber wires into a dipping pool through a wire releasing device for dipping, enabling the carbon fiber wires after dipping to pass through a wire filtering device, enabling the thickness of glue solution attached to the carbon fiber wires to be uniform, and bundling the carbon fiber wires attached to the glue solution and then feeding the carbon fiber wires into a forming die for curing and forming to form the carbon fiber bar; step two: preparing a high-strength steel strand; step three: the central wire of the high-strength steel strand is drawn out to form a steel strand without the central wire; step four: threading the carbon fiber bar into the center of the steel strand without the central wire to form the steel strand with the central wire being the carbon fiber bar; step five: the steel strand of which the central wire is a carbon fiber bar is coated with a sheath. The cable combines the excellent performances of light weight, high strength, no corrosion, corrosion resistance, fatigue resistance and the like of the carbon fiber material, has better strength and fatigue performance, meets the use working condition of high fatigue stress amplitude, and improves the durability of the cable.
Description
Technical Field
The invention relates to a manufacturing method of a composite steel strand, and belongs to the technical field of bridge inhaul cables.
Background
The steel strand inhaul cable is used as a prestressed inhaul cable component and is widely applied to cable-stayed bridges, arch bridges and building engineering with similar structures at home and abroad. The steel strand used in the conventional steel strand inhaul cable is formed by twisting 7 steel wires according to a certain spiral pitch, and is generally also called as a seven-wire prestressed steel strand.
Along with the construction and development of large-span bridges and railway bridges, the requirements on the durability of steel strand materials are higher and higher, and particularly, the railway bridges (including highway and railway bridges) have higher requirements on high stress amplitude fatigue resistance of steel strands. The technical performance of the conventional steel strand cannot meet the construction and development of modern bridges.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for manufacturing a composite steel strand aiming at the prior art, wherein a steel strand with a carbon fiber bar as a central wire meets the use working condition of high fatigue stress amplitude, and the durability of a stay cable is improved.
The technical scheme adopted by the invention for solving the problems is as follows: a manufacturing method of a composite steel strand comprises the following steps:
the method comprises the following steps: manufacturing a carbon fiber bar, conveying carbon fiber wires into a dipping pool through a wire releasing device for dipping, enabling the carbon fiber wires after dipping to pass through a wire filtering device, enabling the thickness of glue solution attached to the carbon fiber wires to be uniform, and bundling the carbon fiber wires attached to the glue solution and then feeding the carbon fiber wires into a forming die for curing and forming to form the carbon fiber bar;
step two: preparing a high-strength steel strand;
step three: the central wire of the high-strength steel strand is drawn out to form a steel strand without the central wire;
step four: threading the carbon fiber bar into the center of the steel strand without the central wire to form the steel strand with the central wire being the carbon fiber bar;
step five: the steel strand of which the central wire is a carbon fiber bar is coated with a sheath.
The carbon fiber yarn in the first step is a piece made of polyacrylonitrile fiber, pitch fiber, viscose fiber or phenolic fiber; the glue solution is epoxy resin glue; the heating temperature of the forming die is 130-200 ℃.
And the high-strength steel strand in the step two comprises a steel wire center wire, wherein a plurality of steel wire side wires are arranged around the steel wire center wire, and the plurality of steel wire side wires are spirally stranded on the steel wire center wire.
The high-strength steel strand in the third step is provided with a wire drawing working area, the wire drawing working area is reversely opened and twisted through a twisting process, the high-strength steel strand advances at a constant speed, the wire drawing working area is sequentially divided into a wire drawing opening and twisting area, a wire drawing area and a wire drawing closing and twisting area along the wire drawing advancing direction, and the wire drawing opening and twisting area, the wire drawing area and the wire drawing closing and twisting area are synchronously operated: the steel wire side wire is opened and twisted by the wire drawing opening and twisting area, the steel wire center wire is drawn out by the wire drawing area, and the steel wire side wire is closed and twisted by the wire drawing closing and twisting area.
The steel strand without the central wire in the fourth step is provided with a wire-passing working area, the steel strand without the central wire advances at a constant speed, the wire-passing working area is sequentially divided into a wire-passing open-twisting area, a wire-passing area and a wire-passing closed-twisting area along the wire-passing advancing direction, and the wire-passing open-twisting area, the wire-passing area and the wire-passing closed-twisting area synchronously operate: the wire threading and opening-twisting area is used for opening and twisting the steel strand without the central wire, the wire threading area is used for threading the carbon fiber bar rod to the center of the steel strand without the central wire, and the wire threading and closing-twisting area is used for closing and twisting the steel strand threaded with the carbon fiber bar rod.
And fifthly, the steel strand with the central wire being the carbon fiber bar passes through a neck mold of the plastic extruding machine in a constant-speed traction manner, the sheath raw material is heated to be molten, an extruding screw of the plastic extruding machine extrudes the molten sheath raw material to the neck mold, the molten sheath raw material is coated on the steel strand with the central wire being the carbon fiber bar, and the steel strand is drawn to a water tank to be cooled.
In the fifth step, the raw material of the sheath is Polyethylene (PE) or polypropylene (PP), and the heating temperature is 180-240 ℃.
The thickness of the sheath is 0.5-3 mm.
Filling epoxy resin in gaps among the central wires of the steel strands of the carbon fiber bar rods; the periphery of the steel strand of which the central wire is a carbon fiber bar is coated with epoxy resin.
Compared with the prior art, the invention has the advantages that: a composite steel strand manufacturing method combines the excellent performances of light weight, high strength, corrosion resistance, fatigue resistance and the like of carbon fiber materials, the central wire of the composite steel strand is a carbon fiber bar, and the side wires of the composite steel strand are high-strength steel wires, so that the composite steel strand has better strength and fatigue performance, meets the use working condition of high fatigue stress amplitude, and improves the durability of a stay cable. When the central wire is drawn and threaded, the operations of opening and twisting, drawing or threading and closing are carried out simultaneously, and the technical problems of central wire drawing and threading filling in the manufacturing process of the composite steel strand are solved.
Drawings
FIG. 1 is a schematic view of a manufacturing process of a carbon fiber bar in a composite steel strand according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a high strength steel strand;
FIG. 3 is a drawing diagram of a high strength steel strand;
FIG. 4 is a schematic cross-sectional view of a steel strand without a center wire;
FIG. 5 is a schematic view of a carbon fiber bar being compounded in a steel strand without a center wire;
FIG. 6 is a schematic cross-sectional view of a steel strand with a carbon fiber bar as the central filament;
FIG. 7 is a schematic cross-sectional view of a composite steel strand;
in the figure, a wire unwinding device 1, a glue dipping pool 2, a wire filtering device 3, a forming die 4, a traction device 5, a wire rewinding machine 6, a high-strength steel strand 7, a steel wire edge wire 71, a steel wire center wire 72, a carbon fiber bar 73, a sheath 74 and a wire dividing frame 8 are arranged.
Detailed Description
The invention is described in further detail below with reference to the following examples of the drawings.
The manufacturing method of the composite steel strand in the embodiment comprises the following steps:
the method comprises the following steps: a carbon fiber bar 73 is produced. As shown in fig. 1, a carbon fiber filament made of polyacrylonitrile fiber or pitch fiber or viscose fiber or phenolic fiber is fed into a dipping tank 2 filled with epoxy resin glue through a filament feeding device 1 for dipping, the carbon fiber filament after dipping passes through a filament filtering device 3, so that the thickness of glue solution attached to the carbon fiber filament is uniform, the carbon fiber filament attached to the glue solution is bundled and then enters a forming mold 4, the forming mold 4 is heated to 160 ℃, so that the carbon fiber bundle and the epoxy resin glue are cured and formed in the forming mold 4 to form a carbon fiber bar 73, and then the carbon fiber bar is pulled by a pulling device 5 and wound on a winding machine 6.
Step two: the high-strength steel strand 7 is prepared. As shown in fig. 2, the high-strength steel strand 7 includes a steel wire center wire 72, a plurality of steel wire side wires 71 are disposed around the steel wire center wire 72, and the plurality of steel wire side wires 71 are helically stranded on the steel wire center wire 72. According to the length of the required composite steel strand applied to a specific project, considering certain loss or process length, determining and preparing a high-strength steel strand with the required length, wherein the high-strength steel strand material conforms to the GB/T5224 or YB/T152 or GB/T25823 or JT/T1105 regulation or other types of steel strands. The cross-sectional structure of the high-strength steel strand is shown in fig. 2. And twisting steel wire side wires at one end of the high-strength steel strand 7, and penetrating a plurality of steel wire side wires into corresponding wire dividing holes on the wire dividing frame.
Step three: and (5) removing the steel wire central wire 72 of the high-strength steel strand 7 to form a steel strand without the central wire. The high-strength steel strand 7 is formed by spirally winding a steel wire edge wire 71 on a steel wire center wire 72 through a twisting process, in order to draw the steel wire center wire 72, the high-strength steel strand 7 needs to be reversely opened and twisted, and in order to prevent the steel wire edge wire 71 after drawing the steel wire center wire 72 from being scattered to cause subsequent failure in forming, the wire drawing process adopts a process of simultaneously opening and twisting and simultaneously drawing and simultaneously closing and twisting. As shown in fig. 3, the section M is a wire drawing working area of the steel wire central wire 72, wherein the section a is a wire drawing and twisting opening area, the section B is a wire drawing area, the section C is a wire drawing and twisting closing area, and the section a, the section B and the section C are sequentially arranged according to the advancing direction of the high-strength steel strand. When the wire drawing work is performed, the high-strength steel strand 7 moves at a constant speed in the direction shown in fig. 3, meanwhile, the wire dividing frame 8 is rotated in the direction shown in the drawing by the section M (other sections do not rotate), at the moment, the section A is opened and twisted, the section C is closed, the steel wire central wire 72 is drawn outwards in the section B, after the wire drawing work is completed, the steel strand without the central wire is formed, and the section of the steel strand without the central wire is shown in fig. 4.
Step four: the steel strand without the central wire and the carbon fiber bar are manufactured in a composite mode, the carbon fiber bar 73 is threaded into the center of the steel strand without the central wire, and the steel strand with the central wire being the carbon fiber bar is formed. As shown in fig. 5, the steel strand without the central wire is opened and twisted simultaneously and the wire is threaded simultaneously and closed, the N section is the wire-threading working area of the steel strand as the central wire, wherein the D section is the wire-threading opening and twisting area, the E section is the wire-threading area, and the F section is the wire-threading closing and twisting area. When the wire threading work is carried out, the steel strand without the central wire travels in the direction shown in figure 5 at a constant speed, and simultaneously N sections rotate the wire dividing frame 8 in the direction shown in the figure (other sections do not rotate); at this time, the section D is opened and twisted, the section F is closed and twisted, the carbon fiber bar 73 is threaded toward the center of the steel strand without the center wire at the section E and simultaneously must rotate around the steel wire side wires along with the twisting of the section N, after the above-mentioned threading process is completed, the steel strand with the center wire being the carbon fiber bar is formed, and the steel strand with the center wire being the carbon fiber bar is shown in fig. 6.
Step five: the steel strands with the central filaments being carbon fiber reinforced bars are coated with sheaths 74. The manufactured steel strand with the carbon fiber bar as the central wire is pulled at a constant speed to pass through a neck mold of an extruding machine to heat a sheath raw material, the sheath raw material is Polyethylene (PE) or polypropylene (PP), the heating temperature is 210 ℃, so that the sheath raw material is melted, an extruding screw of the extruding machine extrudes the sheath raw material to the neck mold, the sheath raw material is coated on the steel strand with the carbon fiber bar as the central wire, and the steel strand is pulled to a water tank to be cooled to form a composite steel strand, wherein the cross-sectional view of the composite steel strand is shown in figure 7. The thickness of the extrusion sheath 74 can be adjusted by adjusting the traction forward speed and the rotating speed of the extrusion screw, and the thickness of the sheath is 0.5-3 mm.
As shown in fig. 7, a composite steel strand includes a central wire made of a carbon fiber reinforced bar 73, a plurality of steel wire side wires 71 are arranged around the periphery of the central wire made of the carbon fiber reinforced bar 73, the plurality of steel wire side wires 71 are spirally twisted on the central wire made of the carbon fiber reinforced bar 73, and a sheath 74 made of polyethylene or polypropylene is wrapped around the periphery of the spirally twisted steel wire side wires 71.
Further, in order to improve the corrosion resistance and mechanical properties of the composite steel strand, after the steel strand without the central wire is composited with the carbon fiber bar in the step 4, the epoxy resin can be filled in the gaps among the steel strands with the central wire being the carbon fiber bar and the epoxy resin can be coated on the periphery of the steel strand with the central wire being the carbon fiber bar by referring to the manufacturing process of the filled epoxy coating steel strand, so that the filled epoxy coating composite steel strand is formed.
The carbon fiber composite inhaul cable combines the excellent performances of light weight, high strength, no corrosion, corrosion resistance, fatigue resistance and the like of the carbon fiber material, the center wire of the carbon fiber composite inhaul cable is a carbon fiber bar, the edge wire is a high-strength steel wire, the carbon fiber composite inhaul cable has better strength and fatigue performance, the service condition of high fatigue stress amplitude is met, and the durability of the inhaul cable is improved. When the central wire is drawn and threaded, the operations of opening and twisting, drawing or threading and closing are carried out simultaneously, and the technical problems of central wire drawing and threading filling in the manufacturing process of the composite steel strand are solved.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (7)
1. The manufacturing method of the composite steel strand is characterized by comprising the following steps of: the manufacturing method comprises the following steps:
the method comprises the following steps: manufacturing a carbon fiber bar (73), conveying carbon fiber wires into a dipping pool (2) through a wire releasing device (1) for dipping, enabling the carbon fiber wires after dipping to pass through a wire filtering device (3) so that the thickness of glue liquid attached to the carbon fiber wires is uniform, and enabling the carbon fiber wires attached to the glue liquid to enter a forming die (4) for curing and forming after being bundled to form the carbon fiber bar (73);
step two: preparing the high-strength steel strand (7);
step three: the central wire of the high-strength steel strand (7) is drawn out to form a steel strand without the central wire;
step four: threading a carbon fiber bar (73) at the center of the steel strand without a central wire to form the steel strand with the central wire being the carbon fiber bar;
step five: a sheath (74) is coated on the steel strand of which the central wire is a carbon fiber bar;
the high-strength steel strand (7) in the third step is provided with a spinning working area, the high-strength steel strand moves at a constant speed through a twisting process in a reverse twisting-opening spinning working area, the spinning working area is sequentially divided into a spinning twisting-opening area, a spinning area and a spinning twisting-closing area along the spinning moving direction, and the spinning twisting-opening area, the spinning area and the spinning twisting-closing area synchronously operate: the wire drawing and twisting opening area is used for opening twisting of the edge wires of the steel wire, the wire drawing area is used for drawing out the center wire of the steel wire, and the wire drawing and twisting closing area is used for closing twisting and compounding of the edge wires of the steel wire;
the steel strand without the central wire in the fourth step is provided with a wire-passing working area, the steel strand without the central wire advances at a constant speed, the wire-passing working area is sequentially divided into a wire-passing open-twisting area, a wire-passing area and a wire-passing closed-twisting area along the wire-passing advancing direction, and the wire-passing open-twisting area, the wire-passing area and the wire-passing closed-twisting area synchronously operate: the wire threading and opening-twisting area is used for opening and twisting the steel strand without the central wire, the wire threading area is used for threading the carbon fiber bar rod to the center of the steel strand without the central wire, and the wire threading and closing-twisting area is used for closing and twisting the steel strand threaded with the carbon fiber bar rod.
2. The method for manufacturing the composite steel strand according to claim 1, wherein the method comprises the following steps: the carbon fiber yarn in the first step is a piece made of polyacrylonitrile fiber, pitch fiber, viscose fiber or phenolic fiber; the glue solution is epoxy resin glue; the heating temperature of the forming die is 130-200 ℃.
3. The method for manufacturing the composite steel strand as claimed in claim 1, wherein the method comprises the following steps: and the high-strength steel strand (7) in the second step comprises a steel wire center wire (72), a plurality of steel wire side wires (71) are arranged around the periphery of the steel wire center wire (72), and the steel wire side wires (71) are spirally stranded on the steel wire center wire (72).
4. The method for manufacturing the composite steel strand according to claim 1, wherein the method comprises the following steps: and fifthly, drawing the steel strand with the central wire being the carbon fiber bar through a neck ring mold of an extruding machine at a constant speed, heating the sheath raw material to be molten, extruding the molten sheath raw material to the neck ring mold by an extruding screw of the extruding machine, coating the molten sheath raw material on the steel strand with the central wire being the carbon fiber bar, and drawing the steel strand to a water tank to cool the steel strand.
5. The method for manufacturing the composite steel strand as claimed in claim 4, wherein the method comprises the following steps: the heating temperature of the sheath raw material is 180-240 ℃.
6. The method for manufacturing the composite steel strand according to claim 1, wherein the method comprises the following steps: and fifthly, the raw material of the sheath is Polyethylene (PE) or polypropylene (PP), and the thickness of the sheath is 0.5-3 mm.
7. The method for manufacturing the composite steel strand as claimed in claim 1, wherein the method comprises the following steps: filling epoxy resin in gaps among the central wires of the steel strands of the carbon fiber bar rods; the periphery of the steel strand of which the central wire is a carbon fiber bar is coated with epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282033.6A CN114214856B (en) | 2021-11-01 | 2021-11-01 | Method for manufacturing composite steel strand |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282033.6A CN114214856B (en) | 2021-11-01 | 2021-11-01 | Method for manufacturing composite steel strand |
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| CN114214856A CN114214856A (en) | 2022-03-22 |
| CN114214856B true CN114214856B (en) | 2023-04-14 |
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Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2702063B2 (en) * | 1993-06-29 | 1998-01-21 | 東京製綱株式会社 | Wire rope |
| US5344315A (en) * | 1993-12-02 | 1994-09-06 | Hamilton Ortho Inc. | Multi-strand orthodontic arch wires and methods for use thereof |
| JPH111994A (en) * | 1997-06-10 | 1999-01-06 | Shinbashikiichirou Shoten:Kk | Stranded-wire reinforcing material with opening |
| KR100264428B1 (en) * | 1998-01-12 | 2001-04-02 | 신형인 | Steel cord applied aramid fiber cord |
| JP2002275774A (en) * | 2001-03-21 | 2002-09-25 | Asahi Intecc Co Ltd | Tube body for medical treatment, balloon catheter, and guide wire for medical treatment |
| JP4064668B2 (en) * | 2001-12-26 | 2008-03-19 | 東京製綱株式会社 | Composite wire rope |
| JP3538649B2 (en) * | 2002-06-17 | 2004-06-14 | 株式会社タイムスエンジニアリング | Carbon fiber strand and method for producing the same |
| JP2007277742A (en) * | 2006-04-04 | 2007-10-25 | Sumitomo Denko Steel Wire Kk | Anticorrosive pc steel member and method for producing the same |
| BRPI0810296A2 (en) * | 2007-05-18 | 2019-09-24 | Samson Rope Tech | rope structure and method for forming a rope structure |
| JP6611237B2 (en) * | 2015-08-31 | 2019-11-27 | トクセン工業株式会社 | Hollow stranded wire for operation |
| CN105304189A (en) * | 2015-12-04 | 2016-02-03 | 江苏亨通电力特种导线有限公司 | Stainless-steel-coated carbon fiber single conductor wire and corresponding production technology thereof |
| CN111535178A (en) * | 2020-04-24 | 2020-08-14 | 中建一局集团第三建筑有限公司 | Prestressed FRP (fiber reinforced Plastic) rib capable of being used for clamping piece anchoring and preparation method thereof |
| CN112160174A (en) * | 2020-10-12 | 2021-01-01 | 江西七圆新材料有限公司 | Intelligent composite epoxy steel strand |
| CN112882167A (en) * | 2021-01-18 | 2021-06-01 | 江西七圆新材料有限公司 | Filled epoxy coating prestress intelligent optical cable and production process |
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2021
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