JPH0436857B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to structures made of glass fiber reinforced plastics, carbon fiber reinforced plastics, etc., which are used as concrete main reinforcements, shear reinforcing bars, etc., and which do not require a relatively strict cross-sectional shape. This invention relates to a method for manufacturing deformed reinforcing materials for use.

(Prior Art) Conventionally, as a manufacturing method for this type of structural reinforcement material, for example, a fiber body made of reinforcing fibers is impregnated with a thermosetting material, and the impregnated material is introduced into a mold having a desired irregular cross section. Pultrusion molding into the desired irregular cross-sectional shape,
A pultrusion molding method is known in which this pultruded fiber body is cured in a curing mold. In addition, in this pultrusion molding method, in order to manufacture structural reinforcing materials having different cross-sectional shapes in the longitudinal direction, the cross-sectional shape of the pultrusion mold is controlled by a hydraulic device so that the cross-sectional shape of the pultrusion mold can be variously deformed. is also known.

(Problems to be Solved by the Invention) In the above-mentioned conventional method for manufacturing irregularly shaped structural reinforcements, in the former case, only irregularly shaped structural reinforcements having the same cross-sectional shape in the length direction can be manufactured; In the latter case, there are disadvantages in that the mold control mechanism is complicated and the range of change in cross-sectional shape is limited.

(Means for Solving the Problems) The present invention eliminates the above-mentioned disadvantages and provides a method for manufacturing irregularly shaped structural reinforcements that can easily produce irregularly shaped structural reinforcements having different cross-sectional shapes in the longitudinal direction. For the purpose of this, a fibrous body made of reinforcing fibers is impregnated with a curable material, introduced into a mold having a desired cross section, and pultruded into a desired cross-sectional shape. This method consists of placing a shaping member around the outer periphery of the body, wrapping a tape around the outer periphery of the body, and curing the drawn fiber body in a state in which it is regulated into a desired irregular cross-sectional shape.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

Fig. 1 shows the manufacturing process of a semi-hardened drawn fiber body, in which 1 is a fibrous body and 2 is a reinforcing fiber. Fibers, aromatic polyamides, aromatic polyetheramides, aromatic polysulfamides, aromatic polysulfonamides,
Heat-resistant organic fibers such as aromatic polyketone amide and aromatic polyamine amide, metal fibers such as piano wire and stainless steel fibers, etc. are used.

A plurality of rovings 3 of these reinforcing fibers 2 are arranged in parallel to form a fibrous body 1, which is impregnated with a curable material 4.

As the hardening material 4, room temperature or thermosetting resin such as epoxy type, polyester type, vinyl ester type, phenol type, polyimide type, alkali metal silicate type, colloidal silica type, phosphate type, cement type, etc. Room temperature or heat curing inorganic materials, room temperature or heat curing organic/inorganic composite materials, etc. can be used, and in this example, room temperature curing resins were used.

Incidentally, necessary compounding agents, curing agents, additives, coloring agents, etc. can be added to the curable material 4.

Next, the fibrous body 1 impregnated with the curable material 4 is introduced into a mold 5 having a desired cross section such as a round shape, and pultruded into a desired cross-sectional shape to obtain a continuous pultruded fibrous body 1 in a semi-cured state. .

The above process is not particularly different from the conventional pultrusion method, but according to the characteristics of the present invention, as shown in FIGS.
Two molding members 7 made of rod-shaped bodies with a round cross section are arranged over the entire length in the longitudinal direction of the continuous drawn fiber body 1 in a semi-cured state that has been pulled out from A tape 8 is wound around the outer periphery of the tape 8 to cover it, and the shaping member 7 is tightened to bite into the drawn fiber body 1 to give the drawn fiber body 1 an irregular cross-section. Then, as shown in Figure 4, after untying the tape 8 wound around the fiber body 1 and removing the molding member 7, it is cut into a desired length with a cutter 6. to obtain a structural reinforcement material.

In the case of the above embodiment, the molding member 7 is attached to the tape 8
By tightening the fibrous material 1, the pultruded fibrous body 1 is bitten and given an irregular cross-sectional shape. The shaping member 7 may be placed while being press-fitted into the drawn fiber body 1 in advance to give an irregularly shaped cross section, and the tape 8 may be used only to regulate the press-fitting state.

The molding member 7 is made of metal, ceramic, inorganic material, resin, a composite material thereof, etc., and can be formed into a rod-shaped body with various cross-sectional shapes instead of the rod-shaped body with a round cross section, and the length of the rod-shaped body itself When the cross-sectional shape in the longitudinal direction is changed, or when the rod-like body is configured in a curved shape such as a wave shape, it is possible to easily manufacture a structural reinforcement material having a different cross-sectional shape in the longitudinal direction as shown in Fig. 5. . Further, the shaping member 7 is not limited to a rod-shaped body, but may be formed into, for example, a spherical body, a star shape, etc., and a large number of them may be scattered around the outer periphery of the fibrous body 1. Furthermore, by configuring the shaping member 7 as a flexible linear body, it can be wound around the fibrous body 1 to give it a helical irregular cross section.

In the embodiment described above, the continuous drawn fiber body 1 is given an irregular cross section in advance using the shaping member 7 and the tape 8, and then the tape is unraveled, the shaping member is removed, and then it is cut into a desired length. However, the drawn fiber body may be cut to a desired length with the shaping member and tape attached.

As the tape 8, a paper tape, a metal tape, a resin tape having a higher melting point than the fibrous body 1, or the like is used, and it is preferable that a release material 9 is applied to the tape 8 to facilitate its release.

(Effects of the Invention) As described above, according to the present invention, a fibrous body made of reinforcing fibers is impregnated with a curable material, introduced into a mold having a desired cross section, and pultruded into a desired cross-sectional shape. A shaping member is placed around the outer periphery of the continuous drawn fiber body in a semi-cured state, a tape is wound around the outer periphery of the shaping member, and the drawn fiber body is cured with the desired cross-sectional shape regulated. Since the molding member placed around the outer circumference of the body and the tape wrapped around the outer circumference can be used as a mold for regulating irregular shapes, various curing molds are not required as in the conventional pultrusion method. In addition, by appropriately selecting the molding members, it is possible to produce structural deformed reinforcement materials that have the same cross-sectional shape in the longitudinal direction, as well as structural deformed reinforcement materials that have different cross-sectional shapes in the longitudinal direction. This has the effect that the reinforcing material can be manufactured easily.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing the manufacturing process of a semi-cured pultruded fiber body, which is one step of an embodiment of the manufacturing method for structural reinforcement of the present invention, and FIGS. 2 and 3 show the subsequent steps. FIG. 4 is a perspective view showing another process, FIG. 4 is a perspective view of the obtained structural reinforcing material, and FIG. 5 is a perspective view of the structural reinforcing material obtained in another example. DESCRIPTION OF SYMBOLS 1... Fibrous body, 2... Reinforcing fiber, 4... Curable material, 5... Mold, 7... Molding member, 8... Tape.

Claims (1)

[Claims] 1 A fibrous body made of reinforcing fibers is impregnated with a curable material, guided into a mold having a desired cross section and pultruded into a desired cross-sectional shape, and a molding member is placed around the outer periphery of this semi-cured continuous pultruded fibrous body. 1. A method for producing a structural reinforcement material, which comprises arranging a fibrous material, wrapping a tape around the outer periphery of the fibrous material, and curing the drawn fiber body in a state in which the pultruded fiber body is regulated to a desired irregular cross-sectional shape.