JPH05147117A - Manufacture of fiber reinforced structural barlike body - Google Patents

Abstract

PURPOSE:To make the easy and continuous manufacturing of fiber reinforced structural barlike body having ruggedness on its surface by a method wherein the bundle of roving fibers impregnated with photo-setting resin liquid is semi-set by being irradiated with light and, under the condition that the ruggedness is formed by pinching the semi-set bundle with ruggedness forming tools, light is irradiated again so as to set the resin. CONSTITUTION:A large number of roving fibers 1 are impregnated with ultraviolet-curing resin liquid 2 and bundled in the form of bar at a die 3, at which excess resin liquid 2 is simultaneously removed. After that, the resultant bundle 9 is semi-cured with ultraviolet lamps 4. Then, the bundle 9 is fed to a continuous pressing machine 7 so as to be pressed with ruggedness forming tools, which are attached on an upper and a lower horizontal roller chains, in order to form ruggedness on its surface during the movement of the tools. During the movement, the bundle is cured with ultraviolet lamps 5 or the like. The curing may well be performed with ultraviolet lamps 6 after the formation of the ruggedness on the surface of the bundle 9. Thus, the cured bundle 9 is cut in proper lengths with cutters 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced structural rod-shaped body having irregularities on its surface, which is useful as a reinforcing material for structural materials such as a reinforcing bar substitute for reinforced concrete.

[0002]

2. Description of the Related Art In recent years, corrosion of reinforcing bars due to salt damage has become a problem especially in buildings and structures in coastal industrial areas. As a means for solving this corrosion problem, resin fiber reinforcement as a substitute for reinforcing bars is used. The use of structural rods is being considered.

As this fiber-reinforced structural rod, a cylindrical core made of a thermosetting resin is provided with spiral projections (Japanese Patent Laid-Open No. 61-274036). It has been proposed that the opposite surfaces of the resin-made rod-shaped body have a corrugated shape that repeats approaching and separating, and the cross-sectional area is constant at any place (Japanese Patent Laid-Open No. 63-138052).

Further, in Japanese Patent Application Laid-Open No. 63-138052, a press molding method in which the rod-shaped body is put in a mold and heated, or a heating mold provided in two boulers which repeats reciprocating motion is used. A method of molding while pressing is proposed.

[0005]

However, Japanese Unexamined Patent Application Publication No. 61-2
The method of Japanese Patent No. 74036 is a method in which a rod-shaped body is spirally wound around a cylindrical core to form a convex portion, so that the production is easy, but the cylindrical core and the convex portion of the rod-shaped body There is a drawback that the joint strength of is weak.

Further, in the method disclosed in Japanese Patent Laid-Open No. 63-138052, since the rod-shaped body is integrally formed, the disadvantage that the joining force is weak is solved, but the opposing surfaces approach each other,
An expensive heating die is required to manufacture such a rod-shaped body because it has a wavy shape that repeats separation and its cross-sectional area is constant at any place.

When continuously manufacturing this rod-shaped body, for example, heating dies are respectively attached to two facing endless chains, and the heating dies are used as upper and lower molds while pressing the rod-shaped body. The method has the drawback that a large number of expensive heating dies are required.

In view of the above points, the present invention provides a manufacturing method for easily and continuously manufacturing a fiber-reinforced structural rod having irregularities on its surface using a photocurable resin and an irregularity forming tool. With the goal.

[0009]

According to the present invention, a large number of roving fibers impregnated with a photocurable resin liquid are bundled into a rod shape,
The formed converging body is irradiated with light to semi-cure the resin, and the semi-cured converging body is sandwiched between the concavo-convex forming tools, while continuously forming concavo-convex on the surface of the converging body, or after forming. Further, the focusing body is irradiated with light to cure the resin.

Further, a large number of roving fibers impregnated with a photocurable and thermosetting combined resin solution are converged into a rod shape through a heating die and heated to semi-cure the resin, and the semi-cured bundle is made uneven. The present invention is characterized in that the resin is cured by irradiating the converging body with light while sandwiching it with a forming tool and continuously forming or forming irregularities on the surface of the converging body.

Further, a large number of roving fibers impregnated with a photocurable resin liquid are bundled into a rod shape, the formed bundle is coated with a thermoplastic resin through an extrusion die, and the coated bundle is provided with an unevenness forming tool. It is characterized in that the resin is cured by irradiating with light while forming the concavo-convex on the surface of the converging body continuously or after forming the concavo-convex.

As the photo-curable resin, a polyester resin, an epoxy resin or the like containing an ultraviolet curing agent is mainly used. A thermoplastic resin may be added as a low shrinkage agent. UV light such as glass fiber penetrates roving fiber,
Fibers that are strong are preferred. It is preferable that the fibers are not exposed on the surface, but there may be irregularities such as glass eyes.

The concavo-convex formed on the surface of the bundle is not what is expected to have adhesiveness as a bonding force with concrete,
Since the bonding force is expected due to the shape, it is provided in the longitudinal direction of the focusing body.

The concavo-convex forming tool has a structure attached to a continuously moving device such as a continuous pressing machine composed of a roller chain or the like. The roller chain preferably has a structure that presses the focusing body from four directions in the vertical and horizontal directions, but it may press the focusing body from two directions of the vertical direction and the horizontal direction. It is also possible to press the focusing body from three diagonal positions.

The concavo-convex forming tool may have a roll shape, a block shape, or any shape as long as irregularities are formed in the longitudinal direction. When unevenness having a different shape is required, the unevenness forming tool is exchanged.

The shape and size of the irregularities are determined by the required specifications of the structure used. When the roller chains are provided so as to face each other in the vertical direction and the horizontal direction, it is desirable to shift the driving pitches of the roller chains in the vertical direction and the horizontal direction by half a pitch in order to alternately form irregularities.

The resin is fed to the concavo-convex forming tool in a state where the resin is semi-cured. The purpose of the semi-cured state of the resin at this time is such that the concavo-convex forming tool can form concavities and convexities on the surface of the converging body. Use the hardness of as a guide.

While the unevenness forming tool is used to form unevenness on the surface of the focusing body, light is irradiated to cure the resin of the focusing body. In this case, the resin may be cured by irradiating light while forming irregularities on the surface, or the resin may be cured by irradiating light after forming irregularities on the surface.

[0019]

Since the unevenness is formed on the surface by the unevenness forming tool in the state where the resin is semi-cured, the surface unevenness of the fiber-reinforced structural rod can be easily and continuously formed.

Since a photocurable resin is used and cured by light, the curing time can be shortened and the curing time can be easily adjusted, and light can be irradiated through the gaps of the irregularity forming tool. The resin may be cured while forming.

If a compounding resin capable of both ultraviolet curing and heat curing is used, two curing methods of ultraviolet curing and heat curing can be used according to the characteristics of the apparatus. Further, when the bundle formed by being impregnated with the photocurable resin liquid is coated with the thermoplastic resin, the roving fibers are not exposed on the surface when unevenness is formed on the surface by a continuous press machine.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the drawings below. FIG. 1 is a process drawing of an embodiment of the method for manufacturing a fiber-reinforced structural rod-shaped body of the present invention.

Reference numeral 1 is a roving fiber, 2 is an ultraviolet curable resin liquid, 3 is a die, 4, 5 and 6 are ultraviolet lamps, 7 is a continuous press machine, 8 is a cutter, and 9 is a bundle. As shown in FIGS. 2 and 3, the concave-convex forming tool 11 is attached to the roller chain 10 of the continuous press machine 7 provided to face each other in the vertical direction and the horizontal direction.

Although the unevenness forming tool 11 has a roll shape, it may have a block shape or the like. The roller chains 10 in the up-down direction and the horizontal direction are configured to move while being shifted by half a pitch.

A large number of roving fibers 1 are impregnated with the ultraviolet curable resin liquid 2, are condensed into a rod shape by the die 3, and the excess resin liquid is removed, and the ultraviolet lamp 4 removes the rod-shaped converging body 9. It is semi-cured.

The semi-cured bundle 9 is sent to the continuous press 7. In the continuous press machine 7, the converging body 9 is pressed by the concavo-convex forming tool 11 attached to the roller chains 10 provided vertically and horizontally.

At this time, the roller chains 10 which are opposed to each other in the vertical and horizontal directions are displaced by half a pitch, so that the concave portions 30 and the convex portions 31 are formed on the surface of the focusing body 9 as shown in FIGS. To be done.

The converging member 9 is formed by the continuous pressing machine 7 into the concavo-convex forming tool 1.
While being pressed by 1, the concavo-convex is formed on the surface of the focusing body 9 and moved, the focusing body 9 is further cured by the ultraviolet lamp 5.

Unlike the conventional heating die method, the curing of the focusing body 9 by the ultraviolet lamp 5 forms a space between the unevenness forming tools 11 attached to the roller chain 10 in the method of the present invention. The focusing body 9 is easily irradiated by the ultraviolet lamp 5 through the space.

The curing by the ultraviolet lamp may be performed by the ultraviolet lamp 6 or the like after the unevenness is formed on the surface of the focusing body 9. The hardened bundle 9 is cut into a suitable size by the cutter 8.

FIG. 6 is a process diagram in the case where a large number of roving fibers impregnated with a photocurable / thermosetting resin solution are converged into a rod shape through a heating die and heated to semi-cure the resin.

A large number of roving fibers 1 are impregnated with the photocurable / thermosetting combined resin liquid 15, are bundled into a rod shape by a heating die 12, and are heated to semi-cure the resin. The continuous pressing machine 7 and the subsequent steps are the same as the above method.

FIG. 7 is a process diagram of a method of forming a concavo-convex pattern on the surface of a bundle by covering the bundle with a thermoplastic resin through an extrusion die and sandwiching the covered bundle with a continuous press machine.
Reference numeral 13 is an extruder, 14 is an extrusion die, and 5 is an ultraviolet lamp for curing a focusing body 17 coated with a transparent or translucent thermoplastic resin.

A large number of roving fibers 1 are impregnated with the ultraviolet curable resin liquid 2, and are bundled into a rod shape by the die 3 and excess resin liquid is removed. Next, the bundled bundle 17 is introduced into the extrusion die 14 and the surface thereof is covered with the transparent or translucent thermoplastic resin extruded from the extruder 13.

The reason why the surface of the bundle 17 is coated with the thermoplastic resin is to prevent the roving fibers 1 from appearing on the surface when the concavo-convex is formed on the surface of the bundle 17 by the continuous pressing machine 7.

Focusing body 1 whose surface is coated with a thermoplastic resin
As for No. 7, unevenness is formed on the surface by the continuous pressing machine 7 by the same method as described above. The converging body 17 is irradiated and cured by the ultraviolet lamp 5 while forming irregularities on the surface. After the unevenness is formed on the surface of the focusing body 17, the ultraviolet lamp 6
May be irradiated and cured.

Example 1 Unsaturated Polyester Resin Rigolac 2064 (Showa High Polymer) 100 parts by weight UV curing agent Irgacure # 651 (Ciba Geigy) 0.5 〃 Liquid paraffin WS-E (Japan Yupica) 10 〃 compounded as above UV curable resin 2 and glass roving (ER4630: Asahi Fiber Glass) 1
The resin is impregnated with a die 3 to remove excess resin to form a bundle 9, and the ultraviolet lamp 4 semi-hardens the vicinity of the surface, and the concavo-convex forming tool 11 attached to the roller chain 10 by the continuous press 7 collects the bundle. While forming the unevenness on the surface of 9, the bundle 9 was cured by the ultraviolet lamp 5 and then cut by the cutter 8.

Example 2 Unsaturated polyester resin Rigolac 2064 (Showa High Polymer) 100 parts by weight UV curing agent Irgacure # 651 (Ciba Geigy) 0.5 〃 Thermosetting agent Perkadox 16 (Kakuyaku Akzo) 0.5 〃 Trigonox 21LS50 (〃) 1.0 〃 Liquid paraffin WS-E (Nippon Yupika) 10 〃 UV curable and thermosetting resin 15 compounded as described above into multiple glass rovings (ER4630: Asahi Fiber Glass) 1 It is impregnated and passed through a heating die 12 to be converged into a rod shape to form a semi-cured state converging body 16, which is formed on the surface of the converging body 9 by a concavo-convex forming tool 11 attached to a roller chain 10 by a continuous press machine 7. While forming the unevenness, the bundle 9 was cured by the ultraviolet lamp 5 and then cut by the cutter 8.

Example 3 A glass roving (ER4630: made by Asahi Fiber Glass) 1 was impregnated with an ultraviolet curable resin 2 blended in the same manner as in Example 1, excess resin was dropped with a die 3, and the extruder 13 was used. It is introduced into the attached extrusion die 14 and coated with a thermoplastic resin to form a bar-shaped bundle 17, which is formed by the concavo-convex forming tool 11 attached to the roller chain 10 by the continuous press machine 7. While forming the unevenness on the surface of 9, the bundle 9 was cured by the ultraviolet lamp 5 and then cut by the cutter 8.

[0040]

The method for producing a rod-shaped body for fiber-reinforced structure of the present invention is configured as described above, and since the unevenness forming tool continuously forms unevenness on the surface in the state where the resin is semi-cured, Surface irregularities of the fiber-reinforced structural rod-shaped body having irregularities on the surface can be easily formed.

Further, since the unevenness forming tool may have a simple structure, it does not require expensive equipment unlike the conventional heating mold, and the fiber-reinforced structural rod having unevenness on the surface can be continuously and inexpensively manufactured. Can be manufactured.

Since a photocurable resin is used and cured by light, the curing time is shortened and the curing time can be easily adjusted, and light is irradiated from the gap between the unevenness forming tools.
Since the resin can be cured while forming irregularities on the surface, the fiber-reinforced structural rod can be manufactured with high productivity.

Further, by alternately shifting the pressing position of the concave-convex forming tool attached to the roller chain in the longitudinal direction,
Since the irregularly deformed irregularities are obtained, it is possible to obtain a fiber-reinforced structural rod which has a high bonding strength with concrete as a reinforcing bar substitute and is also useful as a structural reinforcing agent.

If a resin capable of both ultraviolet curing and heat curing is used, it is possible to selectively use two curing methods of ultraviolet curing and heat curing depending on the characteristics of the apparatus, and the fiber-reinforced structural rod can be manufactured efficiently. be able to.

Further, if the bundle formed by being impregnated with the photocurable resin liquid is coated with the thermoplastic resin, the roving fiber is prevented from being exposed on the surface when the unevenness is formed on the surface by the continuous press machine. ..

[Brief description of drawings]

FIG. 1 is a process drawing of an example of the present invention.

FIG. 2 is a partial front view of the continuous pressing machine used in FIG.

FIG. 3 is a partial side view of the continuous press used in FIG.

FIG. 4 is a partial front view of an example of the fiber-reinforced structural rod-shaped body obtained in the step of FIG.

5 is a cross-sectional view taken along the line AA of the rod-shaped body for fiber-reinforced structure of FIG.

FIG. 6 is a process drawing of another embodiment of the present invention.

FIG. 7 is a process drawing of still another embodiment of the present invention.

[Explanation of symbols]

 1 Roving Fiber 2 Ultraviolet Curable Resin Liquid 3 Die 4, 5, 6 Ultraviolet Lamp 7 Continuous Press Machine 9, 16, 17 Converging Body 10 Roller Chain 11 Concavo-convex Forming Tool 12 Heating Mold 13 Extruder 14 Extrusion Mold 15 Light Curing And thermosetting resin solution

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B29L 31:10 4F

Claims (3)

[Claims] 1. A large number of roving fibers impregnated with a photocurable resin liquid are converged in a rod shape, and the formed converging body is irradiated with light to semi-cure the resin, and the semi-cured converging body is made uneven. While sandwiching with a forming tool, while continuously forming irregularities on the surface of the bundle, or after forming the unevenness, further irradiating light to the bundle to cure the resin, fiber-reinforced structural rod-shaped body Production method. 2. A large number of roving fibers impregnated with a photocurable and thermosetting combined resin solution are converged into a rod shape through a heating mold and are heated to semi-cure the resin, and the semi-cured bundle is obtained. While sandwiching between the concavo-convex forming tools, while continuously forming concavities and convexities on the surface of the converging body, after irradiating the converging body with light to cure the resin, Production method. 3. A large number of roving fibers impregnated with a photocurable resin liquid are bundled into a rod shape, the formed bundle is coated with a thermoplastic resin through an extrusion die, and the coated bundle is formed into irregularities. A method for manufacturing a rod-shaped body for a fiber-reinforced structure, which comprises sandwiching a tool and continuously or irregularly forming a surface of the converging body, or irradiating light to cure the resin.