JPS6135231A - Manufacture of structural irregular-shaped reinforcing material - Google Patents

Abstract

PURPOSE:To enable to manufacture easily a structural irregular-shaped reinforcing material having cross-sectional shapes which are different from each other in a longitudinal direction, by a method wherein a fibrous material is made to cure while an article to be obtained by winding a stringy state material around a covering tape from the outer circumference of the covering tape is being made into a state wherein the article is made to intrude into the fibrous material. CONSTITUTION:A fibrous material 1 is constituted by arranging a plurality of pieces of roving 3 of reinforcing fiber 2 in parallel with each other, with which a curing agent 4 is impregnated. Then draw molding of the fibrous material 1 is impregnated with the curing agent 4 into a desired shape is performed by leading the material 1 into a mold 5 having a desired cross section such as a round mold. Then simultaneously with covering of a tape 6 around the outer circumference of the fibrous material 1 drawn from the inside of the mold 5 in a wound state by a wrapping device, an article to be obtained by winding a stringy state material 7 around the covering tape 6 from the outer circumference of the covering tape at desired pitches by a winding device is made to intrude into the fibrous material 1, under the state of which the fibrous material 1 is made to cure while it is being carried within a heating furnace 8, and the fibrous material 1 unloaded out of the heating furnace 8 after it has been cured sufficiently is cut off into a desired length, through which a structural irregular-shaped reinforcing material is obtained.

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. A pultrusion method is known in which the pultruded fiber body is pultruded into a desired irregular cross-sectional shape and then cured in a curing mold. In addition, in this pultrusion 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 manufacturing method of structural reinforcement members, in the former case, only structural reinforcement members with 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 gap M ratio) The present invention solves 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 providing such materials, a fibrous body made of reinforcing fibers is impregnated with a curable material, pultruded into a desired cross-sectional shape, and a tape is wrapped around the outer periphery of the pultruded fibrous body, and the covering tape is This method consists of curing the fibrous body while wrapping a string-like body around the outer periphery and biting it into the fibrous body.

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

In the figure, 1 indicates a fiber body, and 2 indicates reinforcing fibers, and the reinforcing fibers 2 include inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, aromatic polyamides, aromatic polyetheramides,
Heat-resistant organic fibers such as aromatic polysulfide amide, aromatic polysulfonamide, aromatic polyketone amide, aromatic polyamine amide, etc., metal fibers such as piano wire, stainless steel fiber, 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. A room temperature or heat curing inorganic material, a room temperature or heat curing organic/inorganic composite material, etc. can be used, and in this example, a thermosetting resin was 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 the desired cross section.

Next, the tape 6 is wrapped around the outer periphery of the fiber body 1 pulled out from inside the mold 5 using a wrapping device (not shown), and at the same time, the wrapping (not shown) is wrapped from the outer periphery of the covering tape 6 at a desired pitch using a device, etc. The string-like body 7 is wound around the fiber body 1, and in this state, the fiber body 1 is cured while being transported inside the heating furnace 8, and when it is sufficiently hardened, it is taken out of the heating furnace 8. The fibrous body 1 thus obtained is cut into a desired length using a cutter 9 to obtain a structural reinforcing material.

Cutting of the fibrous body 1 with the cutter 9 involves cutting the tape 6 and the string-like body 7.
It is preferable to do this after untying from the fibrous body 1, since the tape 6 and string-like body 7 can be reused.

In the above embodiment, the continuous drawn fiber body 1 drawn from the mold 5 was covered with the chi 16 and the string-like body 7 was wound thereon. 6 may be wound and covered, and the string-like body 7 may also be wrapped around it.

As the tape 6, a paper tape, a metal tape, a resin tape having a higher melting point than the fiber body 1, or the like is used.

In addition, a release material 10 is applied to the tape 6, and the tape is pulled out.
Preferably, the tape 6 should be easy to unravel after the body 1 has hardened.

The string-like body 7 is made of paper, metal, or resin with a higher melting point than the fiber body 1, and the diameter size, cross-sectional shape, winding pitch, winding direction, etc. of the string-like body 7 can be varied. Accordingly, various longitudinally different cross-sectional shapes can be easily provided to the structural reinforcement.

(Effects of the Invention) According to the present invention, a fibrous body made of reinforcing fibers is impregnated with a hardening material, introduced into a mold having a desired cross section, pultruded into a desired cross-sectional shape, and then A tape is wound around the outer periphery of the first-cut fiber body to cover it, and a string-like body is wound around the outer circumference of the covering tape and is bitten into the fiber body while the fiber body is cured. By appropriately selecting the body diameter size, cross-sectional shape, winding pitch, winding direction, etc., it is possible to easily manufacture structural reinforcing materials having different cross-sectional shapes in the longitudinal direction. .

[Brief explanation of the drawing]

Fig. 1 is a process diagram of one embodiment of the method for producing a structural reinforcing material of the present invention, and Fig. 2 is an enlarged perspective view of the steps of wrapping the tape and wrapping the string. Figures 1 and 2 are enlarged perspective views of the obtained structural reinforcement material.

Claims (1)

[Claims] 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, and a tape is wound around the outer periphery of the pultruded fibrous body to cover it. A method for producing a structural reinforcement material, which comprises wrapping a string-like body from the outer periphery of a tape and curing the fibrous body while keeping the string-like body biting into the fibrous body.