JP3672684B2 - Continuous rod-shaped molded product intermediate, method for producing the same, molded product and molded method thereof - Google Patents

Description

[0001]
[Industrial application fields]
The rod-shaped molded product intermediate of the present invention is a fiber-reinforced composite material intermediate having excellent mechanical strength and handleability useful for civil engineering and building materials, transportation equipment, aerospace materials, general industrial applications, and the like. The present invention relates to a molding method.
[0002]
In particular, when the intermediate of the present invention is used, it has a hardness that does not sag due to its own weight and can be bent by an external force. It can be cured after being embedded therein, and is relatively easy to handle and useful as a reinforcing material. In addition, a complex shape such as a spring or a coil shape is given in an intermediate state and then cured to obtain a molded body, which provides a molded body having a complicated shape with excellent mechanical strength and a molding method thereof. .
[0003]
[Prior art]
In recent years, composite materials using carbon fibers, aromatic polyamide fibers, glass fibers, and the like as reinforcing fibers have been used for sports and leisure products such as golf shafts, aircraft, etc., using their high specific strength and specific rigidity. It has been widely used for structural materials, automotive parts, concrete reinforcement and the like.
[0004]
These composite materials are obtained by cutting a sheet-shaped prepreg, which is an intermediate product obtained by impregnating a reinforcing fiber with a matrix resin, into a predetermined shape, setting it into a molding die having a specific shape, and then autoclave. It is often used as a high-strength molded body through a molding process such as molding or hot press molding that is heated under pressure. As the matrix resin used in the sheet-like prepreg, epoxy resin, bismaleimide resin, unsaturated polyester resin, polyimide resin, etc. are used as thermosetting resins, and recently, thermoplastics such as polyether ether ketone are used. Resins are also being used, and in any case, composite materials were characterized by their excellent heat resistance, mechanical properties, dimensional stability, chemical resistance, and weather resistance. .
[0005]
[Problems to be solved by the invention]
A prepreg is generally made by drawing fibers uniformly in one direction at a fiber basis weight of 10 to 1000 g / m ² or by impregnating a sheet that has been processed into a woven fabric with a thermosetting resin. The width of is often about 50 to 100 cm and is continuous in the longitudinal direction. Alternatively, what is called a strand prepreg made by impregnating 3000 to 12000 reinforcing fiber single fibers into one strand and impregnating the thermosetting resin can also be mentioned as one type of prepreg.
[0006]
In general, prepregs are mostly sheet-like or strand-like intermediates for molding, and it is theoretically possible to produce prepregs composed of 100,000 or more single fibers, or a continuous rod-like prepreg with a diameter of 3 mm or more. However, when the diameter of the rod is increased, it is difficult to uniformly impregnate the resin when the resin is combined with the fiber. Moreover, since there are many problems such as insufficient drying after the resin is dissolved in the solvent and impregnated into the fiber, a rod-shaped prepreg having a large diameter has not been made.
[0007]
On the other hand, a continuous rod-shaped prepreg has been desired for general industrial use. For example, reinforcing bars such as concrete for large-scale structures in recent years have problems such as high specific gravity, difficulty in weight reduction, and rusting. Rarely, the specific strength surpassed that of reinforcing steel, and also showed high performance in terms of environmental resistance.
[0008]
In JP-A-6-264563, a prepreg of carbon fiber yarns is stretched in a concrete form of a concrete, and the thermosetting resin is cured by energization and heating, and then the concrete is poured into the structure. The method of making is specified. However, the carbon fiber yarn prepreg used in such a method is thin and soft, has no self-supporting property, and hangs down due to its own weight. ing.
[0009]
In such a method, the number of carbon fiber yarns to be charged per unit volume, the arrangement method and the position are regulated and the design is fixed, and the workability is also complicated and cannot be easily performed in the field work. .
[0010]
Japanese Patent Application Laid-Open No. 7-178728 discloses the use of a reinforcing fiber prepreg as a concrete reinforcing bar and, as an example of the prepreg, a prepreg in which reinforcing fibers are spirally coated on the outer periphery of a strand. However, since this prepreg uses a moisture-curing resin as the matrix resin, there is a problem that it is difficult to cure at the central portion of the prepreg where moisture penetration is difficult.
[0011]
As other applications, there are many demands for intermediates that can be handled easily as preparations of complex shaped bodies such as springs made of carbon fiber reinforced composite materials and repair materials for home use, but conventional fiber reinforced composites The material molding concept tends to be complicated and costly.
[0012]
[Means for Solving the Problems]
That is, the present invention, in the continuous rod-shaped molded product intermediate, the first reinforcing fiber bundle consisting of long fiber bundles containing carbon fibers impregnated with an uncured thermosetting matrix resin component, and the outer periphery of the bundle is arranged , It consists of a second reinforcing fibers consisting of long fiber bundles comprising carbon fibers impregnated with thermosetting matrix resin component of the uncured, and the second first continuous rod reinforcing fiber bundle is bundled in the reinforcing fibers When the continuous rod-shaped intermediate body is upright at a length of 100 times the diameter of the intermediate body under the condition of 20 ° C., it is bent to an angle of 90 ° or more by itself. it has no such sufficient hardness, continuous, characterized in that also has flexibility and can be wound on the pipe at least 10 times the diameter of the diameter of the intermediate at a temperature of curing initiation temperature below the matrix resin In rod-shaped molding It is a body.
[0013]
Moreover, the manufacturing method of the intermediate | middle rod-shaped molded object intermediate | middle is as follows. The 2nd reinforcement fiber is wound on the outer periphery of the 1st reinforcement fiber bundle impregnated with the uncured thermosetting matrix resin, and the winding pressure is 1 kg / mm ² or more. It is characterized by being wound in a spiral shape with a winding pressure and binding the first reinforcing fiber bundle with the second reinforcing fiber.
[0014]
The method of forming a continuous rod-shaped molded body includes a first reinforcing fiber bundle composed of a long fiber bundle containing carbon fibers impregnated with an uncured thermosetting matrix resin component , and an uncured heat disposed on the outer periphery thereof. curable matrix consists of a second reinforcing fibers consisting of long fiber bundles comprising carbon fibers impregnated with a resin component, and the second reinforcing fibers with the first reinforcing fiber bundle is bunched continuous rod-like molding intermediate A continuous rod-shaped molded product intermediate that does not bend to an angle of 90 ° or more by itself when the intermediate product is upright at a temperature of 20 ° C. with a length 100 times the diameter of the intermediate product. A continuous rod-shaped molded product having a high hardness and having a flexibility capable of being wound around a pipe having a diameter of at least 10 times the diameter of the intermediate at a temperature lower than the curing start temperature of the matrix resin. , Carbon fiber electrical resistance Heat is generated by utilizing, characterized in that curing the thermosetting matrix resin component.
[0015]
The continuous rod-shaped molded product intermediate of the present invention is self-supporting, has sufficient hardness so that it does not hang down due to its own weight, and also has flexibility that can be bent by external force. It is effective for the reinforcement of concrete or the production of a molded body having a complicated shape such as a spring shape. The continuous rod-shaped molded product intermediate of the present invention is suitable for applications such as molded products such as springs used in automobiles, transportation vehicles including aircraft, reinforcement of buildings such as houses, and reinforcement of structures such as edges. [0016]
The continuous rod-shaped forming intermediate of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a continuous rod-shaped forming intermediate. The intermediate product of the continuous rod-shaped product of the present invention comprises a first reinforcing fiber bundle 1 composed of a long fiber bundle including carbon fibers impregnated with an uncured thermosetting matrix resin component , The second reinforcing fibers 2 are made of long fiber bundles containing carbon fibers impregnated with a cured thermosetting matrix resin component , and the first reinforcing fiber bundles 1 are bound by the second reinforcing fibers 2. .
[0017]
In a continuous rod-like intermediate body of the present invention, the first and second types of reinforcing fibers are carbon fibers. The carbon fibers are not particularly limited, such as acrylic carbon fibers and pitch-based carbon fibers, and those having a tensile strength of 350 kgf / mm ² and a tensile elastic modulus of 24 ton / mm ² are used for general purposes. High elastic modulus fibers having a tensile elastic modulus of 24 ton / mm ² or more can also be used. A so-called medium-elastic high-strength carbon fiber having a tensile strength of 400 Kgf / mm ² or more and an elastic modulus of 30 T / mm ² that improves the mechanical properties of the composite material can also be used.
[0018]
As for the form of the first reinforcing fiber, 3000 to 12000 single fibers are collected to form one strand, and further collected and used in a form of braid, woven fabric, twisted yarn, combined yarn or a combination thereof. You can also. Alternatively, a tow-shaped continuous yarn in which 12,000 or more single fibers are converged can also be used. Or, unidirectional sheets impregnated with a thermosetting resin to the reinforcing fiber continuous shape, fabrics, those were the rod-shaped rolled staple fibers matted Prin prepreg or the like, or those bundled strand-like prepreg, or A combination of these can be used. The second type of reinforcing fibers arranged in an outer peripheral uses those of the first reinforcing fibers and the same fiber types.
[0019]
As the form of the second reinforcing fiber, a strand, a sheet, a woven fabric, a braid, a twisted yarn, a combined yarn, or a combination thereof can be used. A tape-shaped prepreg impregnated with a thermosetting resin can also be used. When a strand is used as the second reinforcing fiber, when the strand is given a twist of 1 to 10 / m, there is no deviation between the single fibers when the intermediate is wound in a certain direction. It can be wound without breaking. Lesser fibers are not preferred because they are rubbed when mechanically wound and the fiber surface tends to be damaged. The second reinforcing fiber has a configuration in which the first reinforcing fiber is bound in a spiral shape with an arbitrary pitch from above the first reinforcing fiber, and the first reinforcing fiber is bound.
[0020]
The pressure at the time of winding needs to be 1 kg / cm ² or more. If it is less than 1 kg / cm ² , many defects such as voids and microvoids remain in the molded product after curing of the thermosetting resin by heating, and the mechanical strength of the molded product is lowered, which is not preferable.
[0021]
The thermosetting resin composition as the thermosetting matrix resin to be impregnated into the first and second reinforcing fibers is not particularly limited, such as an epoxy resin, a bismaleimide resin, an unsaturated polyester resin, and a polyimide resin. The first and second reinforcing fiber layer, containing a thermosetting matrix resin component.
[0022]
The content of the resin composition in the continuous rod-shaped molded product intermediate is suitably 30 to 50% by volume. When the resin is 30% or less, the temperature unevenness is increased after molding, and when the resin is 50% or more, the temperature unevenness due to current heating increases, which is not preferable.
[0023]
Moreover, you may mix and use a thermoplastic resin etc. in a thermosetting resin. In this case, since the flexibility of the intermediate may be lost when the amount of the thermoplastic resin increases, it is preferable that the thermoplastic resin does not exceed 30% by volume.
[0024]
Continuous rod-like preform intermediates of the present invention, the second reinforcing fibers arranged a first reinforcing fibers and a thermosetting resin of the core portion inside layer configured as a principal component, the outer periphery of the inner layer And thermosetting resin as the main components, and is bound by the second reinforcing fiber, it has a self-supporting property that does not easily sag due to its own weight. In addition, it has flexibility that can be bent by an external force. Here, the self-supporting property means that when it stands upright at a length of 100 times the diameter of the intermediate body under the condition of 20 ° C., it does not bend to an angle of 90 degrees or more by itself. Further, the flexibility means a characteristic that can be wound around a pipe having a diameter at least 10 times the diameter of the intermediate of the present invention at a temperature not higher than the curing start temperature of the matrix resin. This characteristic is an important characteristic for bender process and bar arrangement work when the intermediate of the present invention is used as a reinforcing bar for concrete.
[0025]
In order to impart such characteristics to the intermediate, the first reinforcing fibers are bundled with the second reinforcing fibers. If the diameter of the rod is 3 mm or more in the production of the continuous rod-shaped molded product intermediate, there is a problem of resin impregnation and insufficient drying in the ordinary prepreg production method. It is preferable to produce it.
[0026]
An example of the method for producing the continuous rod-shaped molded product intermediate of the present invention is as follows. As shown in FIG. 2, the second reinforcing fiber bundle 2 is continuously wound around the first reinforcing fiber bundle while the first reinforcing fiber bundle 1 is fed at a constant speed.
[0027]
An example of a method for obtaining a molded product using the continuous rod-shaped molded product intermediate of the present invention is as follows. As shown in FIG. 3, the rod-shaped molded product intermediate 3 is wound around the metal core 4 and heated to cure the resin, and then the metal core is pulled out to form a molded product (spring).
[0028]
As a means to heat the continuous rod-shaped molded product, heat is generated by passing an electric current using the electric resistance of carbon fiber, and when a molded product is obtained by curing the thermosetting resin component, it is necessary to intermediate It is desired that the carbon fiber content relative to the whole body is 30% by volume or more, preferably 50% by volume or more. The fiber volume content of the rod-shaped molded body after curing is preferably in the range of 50 to 70% by volume in order to optimize the mechanical properties.
[0029]
Since these continuous rod-shaped intermediate products are flexible enough to be bent by an external force, they can be compactly wound around a bobbin, a creel or the like, and are easy to carry and can be brought into the field. The continuous rod-shaped molded product intermediate can be formed into a molded product by filling a predetermined shape or mold or winding it, and then heating to cure the thermosetting resin component.
[0030]
By winding the continuous rod-shaped molded product intermediate body around a cylindrical mold in a coil shape and heating it, a molded product having a special shape such as a spring can be produced. The heating temperature varies depending on the type of the thermosetting resin component used, but is generally in the range of 70 to 300 ° C.
[0031]
The intermediate product of the continuous rod-shaped product of the present invention is composed of an inner layer and an outer side covering the inner layer, and the winding pressure is 1 Kg / mm ² or more, so that it is like a press machine, an autoclave or a rubber mold. Even without using a jig or the like devised so that pressure is applied during proper molding, a molded product with few defects can be obtained.
[0032]
The obtained molded body can be filled with reinforcing fibers such as carbon fibers at a high rate of 50% by volume or more in one direction, and is a molded body having excellent tensile and compressive strength in the length direction. be able to.
[0033]
When a fiber having electrical conductivity is used as the reinforcing fiber, the intermediate itself can be heated by electric heating to cure the thermosetting resin component, and the curing operation can be completed by a simple method. It is also possible to harden by energization heating after being wound from above the structure, and the structure can be reinforced by a simple method, which is effective. As the electrically conductive reinforcing fiber, not only a strength factor but also a carbon fiber having a resistance value suitable for heating the fiber itself is preferable. When using the continuous rod-shaped molded product intermediate of the present invention for reinforcing a concrete, the concrete is poured in the state of an intermediate that does not cure the thermosetting resin component, and after the concrete has hardened, the resin is heated by electric heating. Can be cured into a molded body.
[0034]
In this case, there is no problem in workability since the work can be performed while continuously taking out the intermediate body wound around a creel or the like. In this method, the concrete / fiber is excellent in adhesiveness between the concrete and the rod-shaped molded article because the resin is cured by energization heating after filling the concrete before curing the thermosetting resin. A reinforced composite material could be made.
[0035]
As unexpected effect, fluff and projections by Re fiber switching such as carbon fiber of intermediate surface anchor after curing - it was intended to enhance the effect with becomes reinforcing effect. Further, since the fiber density in the molded body is high and there are few defects such as voids, it is possible to arrange the continuous rod-shaped molded body with a high packing density in a matrix such as concrete. In a continuous rod-shaped molded product intermediate composed mainly of reinforcing fibers with electrical conductivity such as carbon fiber, the method of energizing is generally that metal terminals are attached to both ends of the rod, and electricity flows from these terminals. Causes the intermediate to generate heat and cures the thermosetting resin component.
[0036]
The applied voltage from the power source is desirably a voltage within a range where the cured thermosetting resin is not decomposed. The power source may be direct current or alternating current. The continuous rod-shaped molded product intermediate and the molded product of the present invention are effective for forming a reinforced fiber plastic having a complicated shape such as a coil shape, and also effective for reinforcing and reinforcing a structure such as a concrete. is there.
[0037]
In particular, reinforcing fibers such as carbon fibers can be aligned and filled at a high rate in one direction in the length direction of the rod, so that a molded body having excellent tensile and compressive strength in the length direction can be obtained. ,It is valid.
[0038]
[Example]
EXAMPLES Hereinafter, although this invention is demonstrated further in detail by Examples 1-3, this invention is not restrict | limited by these Examples.
[Example 1]
Epoxy resin composition in one continuous Besfight HTA-12K (fiber weight: 0.8 g / m, tensile strength: 350 Kg / mm ² , tensile elastic modulus: 24 ton / mm ² ) manufactured by Toho Rayon Co., Ltd. Was impregnated with 38% by weight (carbon fiber content: 62% by weight) to prepare a strand-shaped prepreg. The epoxy resin composition is mainly composed of a phenol novolac type epoxy resin and a bisphenol A type epoxy resin, and dicyandiamide as a curing agent. Thirty strand-shaped prepregs were aligned in one direction to form an inner layer. Next, a continuous rod-shaped molded product intermediate having a diameter of about 5 mm is wound from above the inner layer with one strand of Besfite HTA-12K at a winding pitch of 2 mm with a winding pressure of 2 kg / cm ^2. Was made.
[0039]
The carbon fiber content relative to the entire intermediate was 67% by weight. This intermediate was wound around an insulated 50 cm long cylindrical mold having a diameter of 10 cm and spirally wound 10 times at a pitch of 2 cm, and was suspended in an autoclave together with the mold. The intermediate epoxy resin composition is cured with an autoclave under conditions of a molding pressure of 3 kg / cm ² , a molding temperature of 130 ° C., and a molding time of 1 hour. The resulting molded body is removed from the cylinder and the end is cut off. A spring-shaped molded body was obtained. This spring was able to withstand a tensile load of 1 ton.
[0040]
[Example 2]
Thirty continuous Besfight HTA-12K (fiber weight: 0.8 g / m, tensile strength: 350 Kg / mm ² , tensile elastic modulus: 24 ton / mm ² ) manufactured by Toho Rayon Co., Ltd. are drawn in one direction. The sheet was then impregnated with an epoxy resin composition to prepare a sheet-like unidirectional prepreg having a fiber basis weight of 300 g / m @ 2 and a resin content of 38% by weight. The epoxy resin composition is mainly composed of a phenol novolac type epoxy resin and a bisphenol A type epoxy resin, and dicyandiamide as a curing agent. This prepreg was bundled so that the direction of the fibers was one direction to form an inner layer. Next, one strand of Besphite HTA-12K, twisted 40 times per meter from the top of this inner layer, was strongly wound at a winding pressure of 2 kg / cm ² from above the inner layer at a winding pitch of 2 mm. A 5 mm continuous rod-shaped molded product intermediate was produced. As in Example 1, it was wound 10 times in a spiral shape at a winding pitch of 2 cm around a 10 cm insulated cylindrical cylinder of 50 cm length.
[0041]
The carbon fiber content relative to the whole intermediate was 67% by weight. Metal fittings were attached and fixed as electrode terminals to both ends of the rod-shaped molded product intermediate. When a current of 20 V was passed from the electrode terminal to the intermediate body, the intermediate body generated heat and reached 130 ° C., and the epoxy resin composition of the intermediate body started a curing reaction. The energized state was continued for 60 minutes to complete the curing reaction, and then the obtained molded body was removed from the cylinder and the end was cut to obtain a spring-shaped molded body. This spring was able to withstand a tensile load of 1 ton as in Example 1.
[0042]
[Example 3]
In the same manner as in Example 1, a continuous rod-shaped molded product intermediate was produced. This intermediate was cut to a length of 300 mm, and metal fittings were attached to both ends as electrode terminals, and then fixed by applying tension to both ends. When a current of 20 V was passed from the electrode terminal to the intermediate body, the intermediate body generated heat and reached 130 ° C., and the epoxy resin composition of the intermediate body started a curing reaction. After the energized state was continued for 60 minutes to complete the curing reaction, the obtained molded body was a round bar-shaped molded body having a diameter of 5 mm. When this round bar was subjected to a tensile test, it was broken at a load of 3.5 tons.
[0043]
[Comparative Example 1]
In the same manner as in Example 1, a strand-shaped prepreg impregnated with 38 wt% of the epoxy resin composition was produced. Thirty strand-shaped prepregs were twisted and aligned to produce a rope-shaped molded product intermediate having an apparent diameter of 8 mm. The carbon fiber content relative to the entire intermediate was 62% by weight. Similarly to Example 3, the intermediate body was cut to a length of 300 mm, and metal fittings were attached to both ends as electrode terminals, and the resin was cured by energization. Although the obtained molded body was in a loop shape, the strands were partially separated and were not integrated. When this molded body was subjected to a tensile test, fracture started from a load of 1.5 tons.
[0044]
[Example 4]
In the same manner as in Example 1, a continuous rod-shaped molded product intermediate was produced. Four of these intermediate bodies are prepared with a length of 300 mm, and are fixed by applying tension to both ends in a 25 mm square mold so that the distance between the intermediate bodies is 5 mm. Installed as a terminal. A concrete having an unreinforced compressive strength of 350 kgf / cm ² was poured into the mold, and the concrete was cured while being cured at room temperature. After curing, with the tension applied to the intermediate body, a current of 20 V is passed from the electrode terminal to the intermediate body to heat the intermediate body, the intermediate epoxy resin composition is cured, and the carbon fiber rod-shaped in the concrete A molded product was produced. After cooling to room temperature, a test piece having a length of 100 mm was cut out from the reinforced concrete square bar and subjected to a compression test. The specimen was broken at a maximum load of 8.0 tons.
[0045]
【The invention's effect】
As described above, the present invention is a continuous rod-shaped molded product intermediate that does not hang down due to its own weight, has hardness, and also has flexibility that can be bent by an external force, and has a large diameter. A rod-shaped molded product intermediate could be provided. For this reason, it was hardened after embedding in concrete or plastic, and it was excellent in handleability.
[0046]
Further, it is suitable for molding a complicated shape such as a spring or a coil, and can provide a molded body having excellent mechanical strength. .
[Brief description of the drawings]
FIG. 1 is a schematic view of a continuous rod-like intermediate according to the present invention.
FIG. 2 is a schematic view of the continuous rod-shaped intermediate production apparatus of the present invention.
FIG. 3 is a view showing a state in which the continuous rod-shaped intermediate body of the present invention is wound around a cored bar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st reinforcing fiber bundle 2 2nd reinforcing fiber bundle 3 Rod-shaped molded product intermediate body 4 Core metal

Claims (12)

In a continuous rod-shaped molded product intermediate, a first reinforcing fiber bundle comprising a long fiber bundle containing carbon fibers impregnated with an uncured thermosetting matrix resin component , and an uncured thermosetting disposed on the outer periphery thereof A second reinforcing fiber composed of a long fiber bundle containing carbon fibers impregnated with a conductive matrix resin component , and the second reinforcing fiber is wound in a spiral shape with a winding pressure of 1 kg / mm ² or more. A continuous rod-shaped molded product intermediate body in which the first reinforcing fiber bundles are bundled, and the continuous rod-shaped molded product intermediate body is erected at a length of 100 times the diameter of the intermediate body at 20 ° C. Sometimes it winds around a pipe with a diameter that is at least 10 times the diameter of the intermediate at a temperature that is sufficient to prevent it from bending to an angle of 90 degrees or more by itself and at a temperature not higher than the curing start temperature of the matrix resin. In Continuous rod-like preform intermediates, characterized in that flexibility combines that.   The continuous rod-shaped molded product intermediate according to claim 1, wherein the content of all reinforcing fibers relative to the total of the thermosetting matrix resin component and the reinforcing fibers in the entire molded product intermediate is 50% by volume or more. The continuous rod-shaped molded product intermediate according to claim 1 or 2, wherein the first reinforcing fiber bundle is wound and bundled in a spiral shape with a second reinforcing fiber disposed on an outer periphery thereof. . The continuous rod-shaped molded product intermediate according to any one of claims 1 to 3 , wherein the second reinforcing fibers arranged on the outer periphery are formed of braid, woven fabric, twisted yarn, synthetic yarn, or a combination thereof. . Second reinforcing fibers, continuous rod-like preform intermediate of claims 1 to 4, wherein the long fiber having a twist of 1-10 / m. First reinforcing fibers, continuous rod-like preform intermediate of claims 1 to 5, wherein a fiber bundle comprising carbon fibers 50% by volume or more. Continuous rod-like preform intermediate of claims 1 to 6, wherein having an electrode for energizing the terminal portion. Continuous rod-like preform intermediate of claims 1 to 7, wherein the rod diameter is 3mm or more. A second reinforcing fiber is wound around the outer periphery of the first reinforcing fiber bundle impregnated with an uncured thermosetting matrix resin in a spiral shape with a winding pressure of 1 kg / mm ² or more, and the first reinforcing fiber bundle is wound. The method for producing a continuous rod-shaped molded product intermediate according to claim 1, wherein the second reinforcing fibers are bound together. A first reinforcing fiber bundles having a length fiber bundles comprising carbon fibers impregnated with thermosetting matrix resin component of the uncured, disposed on the outer periphery, the carbon fibers impregnated with thermosetting matrix resin component of the uncured long fiber bundle consists of a second reinforcing fiber made of, and of the second reinforcing fibers, first the reinforcing fiber bundle by wrapping the spirally wound pressure 1 kg / mm ² or more wound pressure bundling including When the continuous rod-shaped molded product intermediate is made upright at a length of 100 times the diameter of the intermediate product under the condition of 20 ° C. , the continuous rod-shaped molded product intermediate is more than 90 degrees by itself. A continuous rod that has sufficient hardness so that it does not bend to an angle and also has the flexibility to be wound around a pipe having a diameter at least 10 times the diameter of the intermediate at a temperature not higher than the curing start temperature of the matrix resin. Condition Energized to form compound intermediate, to generate heat by utilizing the electrical resistance of the carbon fibers, the molding method of a continuous rod-shaped article, characterized in that curing the thermosetting matrix resin component. A first reinforcing fiber bundles having a length fiber bundles comprising carbon fibers impregnated with thermosetting matrix resin component of the uncured, disposed on the outer periphery, the carbon fibers impregnated with thermosetting matrix resin component of the uncured long fiber bundle consists of a second reinforcing fiber made of, and of the second reinforcing fibers, first the reinforcing fiber bundle by wrapping the spirally wound pressure 1 kg / mm ² or more wound pressure bundling including When the continuous rod-shaped molded product intermediate is made upright at a length of 100 times the diameter of the intermediate product under the condition of 20 ° C. , the continuous rod-shaped molded product intermediate is more than 90 degrees by itself. A continuous rod that has sufficient hardness so that it does not bend to an angle and also has the flexibility to be wound around a pipe having a diameter at least 10 times the diameter of the intermediate at a temperature not higher than the curing start temperature of the matrix resin. Condition The form was intermediate, shaped into a desired shape, and then forming method of continuous rod-shaped article, characterized in that curing the thermosetting matrix resin component. A first reinforcing fiber bundles having a length fiber bundles comprising carbon fibers impregnated with thermosetting matrix resin component of the uncured, disposed on the outer periphery, the carbon fibers impregnated with thermosetting matrix resin component of the uncured long fiber bundle consists of a second reinforcing fiber made of, and of the second reinforcing fibers, first the reinforcing fiber bundle by wrapping the spirally wound pressure 1 kg / mm ² or more wound pressure bundling including When the continuous rod-shaped molded product intermediate is made upright at a length of 100 times the diameter of the intermediate product under the condition of 20 ° C. , the continuous rod-shaped molded product intermediate is more than 90 degrees by itself. A continuous rod that has sufficient hardness so that it does not bend to an angle and also has the flexibility to be wound around a pipe having a diameter at least 10 times the diameter of the intermediate at a temperature not higher than the curing start temperature of the matrix resin. Condition Form was intermediate was shaped into a desired shape, then a continuous rod-shaped molded body formed by curing the thermosetting matrix resin component.

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