JPH0723755B2 - Manufacturing method of fiber reinforced composite resin pipe - Google Patents
Manufacturing method of fiber reinforced composite resin pipeInfo
- Publication number
- JPH0723755B2 JPH0723755B2 JP61314295A JP31429586A JPH0723755B2 JP H0723755 B2 JPH0723755 B2 JP H0723755B2 JP 61314295 A JP61314295 A JP 61314295A JP 31429586 A JP31429586 A JP 31429586A JP H0723755 B2 JPH0723755 B2 JP H0723755B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- fiber
- mandrel
- reinforced resin
- resin layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011347 resin Substances 0.000 title claims description 46
- 229920005989 resin Polymers 0.000 title claims description 46
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 239000003733 fiber-reinforced composite Substances 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 4
- 239000012783 reinforcing fiber Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229920002292 Nylon 6 Polymers 0.000 claims description 2
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 2
- 229930182556 Polyacetal Natural products 0.000 claims description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920006324 polyoxymethylene Polymers 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920005992 thermoplastic resin Polymers 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 229920006305 unsaturated polyester Polymers 0.000 claims description 2
- 229920001567 vinyl ester resin Polymers 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 11
- 238000009412 basement excavation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 239000004727 Noryl Substances 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、一般には繊維強化複合樹脂管（以後「FRP
管」という。）の製造法に関するものであり、更に詳し
く言えば接続長尺化が可能で、特に回転トルクの伝達に
適したFRP管の製造法に関するものであり、このFRP管
は、例えば土木分野に於けるボーリング機械の掘削用連
結管及び自動車、船舶、航空機等の輸送機械のプロペラ
シヤフト等に好適に使用し得るものである。勿論、本発
明にて得られるFRP管は回転トルク伝達用に限定される
ものではなく、例えば建築分野等における柱、梁、流体
輸送用配管等のような引張力、圧縮力のかかる高強度構
造用材料としても好適に使用可能である。TECHNICAL FIELD OF THE INVENTION The present invention generally relates to fiber-reinforced composite resin pipes (hereinafter “FRP”).
"Tube". ), More specifically, it relates to a method of manufacturing an FRP pipe that can be made longer in connection and is particularly suitable for transmitting rotational torque. This FRP pipe is used in, for example, the field of civil engineering. It can be suitably used for a connecting pipe for excavation of a boring machine, a propeller shaft of a transportation machine such as an automobile, a ship, and an aircraft. Of course, the FRP pipe obtained by the present invention is not limited to the transmission of rotational torque, and is a high-strength structure to which a tensile force or a compressive force is applied, such as a pillar, a beam, a fluid transportation pipe, etc. It can also be suitably used as a material.
従来の技術 従来、例えばボーリング機械に使用される掘削用連結管
としては鋼製パイプが使用されている。該鋼製パイプを
掘削用連結管、つまり掘削用パイプとして使用する場合
には、該各パイプの両端部に夫々雄ねじ及び雌ねじを予
め形成し、連結すべき隣接する二つのパイプの当接端部
に形成された該雄ねじと雌ねじを螺合せしめることによ
り直接両パイブを接続し、所望の長さに連結する方法が
採用されている。又、別法として、各パイプの両端部に
は雄ねじを形成し、接続用の雌ねじ付短管で両パイプを
接続する方法もとられている。2. Description of the Related Art Conventionally, a steel pipe has been used as a connecting pipe for excavation used in, for example, a boring machine. When the steel pipe is used as a connecting pipe for excavation, that is, an excavating pipe, male and female screws are formed in advance at both ends of each pipe, and abutting end portions of two adjacent pipes to be connected to each other. A method is adopted in which both the pipes are directly connected to each other by screwing the male screw and the female screw formed in the above into a desired length. Another method is to form male threads at both ends of each pipe and connect both pipes with a short pipe with a female thread for connection.
発明が解決しようとする問題点 上述のように、従来の掘削用パイプは鋼製とされるため
に、 （１）重量が大であり作業性が悪いのみならず、特に数
千メートルのボーリングになると掘削用パイプの荷重だ
けでも数百トンとなり、特別に該掘削用パイプのための
支持構造体が必要とされる。Problems to be Solved by the Invention As described above, since the conventional pipe for drilling is made of steel, (1) not only is it heavy in weight and poor in workability, but especially for boring of several thousand meters. The load on the excavation pipe alone amounts to several hundred tons, and a special support structure for the excavation pipe is required.
（２）石油、天然ガスの掘削に見られる酸処理作業時に
は、使用される塩酸により掘削用パイプが腐食する。(2) During the acid treatment work found in oil and natural gas drilling, the hydrochloric acid used corrodes the drilling pipe.
といつた問題があつた。There was a problem.
このような鋼製掘削用パイプに代わるものとして、軽量
で、腐食の問題がなく、且つ機械的強度も良好な、繊維
強化樹脂にて形成された繊維強化複合樹脂管が提案され
ている。As a substitute for such a steel pipe for excavation, a fiber-reinforced composite resin pipe formed of a fiber-reinforced resin, which is lightweight, has no problem of corrosion, and has good mechanical strength, has been proposed.
斯る繊維強化複合樹脂管を、例えば掘削用連結管として
使用するためには、その両端部分に所定の長さを有した
管接続用の金属製短管を取り付け、接続長尺化を実現す
ることが必要である。In order to use such a fiber-reinforced composite resin pipe as, for example, a connecting pipe for excavation, a metal short pipe for pipe connection having a predetermined length is attached to both ends of the pipe to realize a long connection. It is necessary.
一般には、内径が一定の繊維強化複合樹脂管は、外径が
一定とされる細長形状のマンドレルの上に樹脂含浸繊維
を巻き付け、繊維強化樹脂層を形成し、次いで、硬化し
た後、マンドレルをいずれかの方向に引抜くことによっ
て、製造することができる。In general, a fiber-reinforced composite resin tube with a constant inner diameter is formed by winding resin-impregnated fibers on an elongated mandrel with a constant outer diameter to form a fiber-reinforced resin layer, and then curing the mandrel. It can be manufactured by pulling out in either direction.
しかしながら、繊維強化複合樹脂管の両端部分は、金属
製短管を取り付けるために、長手方向中央部より、両端
部において大径とされることが望まれることがある。こ
のような繊維強化複合樹脂管は、上記マンドレルを使用
した製造法では作製することができない。即ち、このよ
うな繊維強化樹脂管を製造するには、マンドレルの両端
部が中央部より大径となり、成形後に管から引抜くこと
ができないからである。However, it is sometimes desired that both end portions of the fiber-reinforced composite resin pipe have a larger diameter at both end portions than the central portion in the longitudinal direction in order to attach the metal short pipe. Such a fiber-reinforced composite resin pipe cannot be manufactured by the manufacturing method using the above mandrel. That is, in order to manufacture such a fiber-reinforced resin pipe, both ends of the mandrel have a larger diameter than the central part, and the mandrel cannot be pulled out from the pipe after molding.
そこで、本発明者らは、マンドレルとして、長手方向中
心部で分割可能な細長のマンドレルを使用することによ
って、このような特殊な形状の繊維強化樹脂管を好適に
製造し得ることを見出した。本発明は斯る本発明者らの
新規な知見に基づくものである。Therefore, the present inventors have found that a fiber-reinforced resin pipe having such a special shape can be suitably manufactured by using an elongated mandrel that can be divided at the central portion in the longitudinal direction as the mandrel. The present invention is based on the novel findings of the present inventors.
発明の目的 本発明の目的は、重量を軽減し、腐食の問題をなくし、
且つ耐引張り、耐内圧性が大きく、接続長尺化可能なFR
P管の製造法を提供することである。OBJECT OF THE INVENTION The purpose of the present invention is to reduce weight, eliminate the problem of corrosion,
In addition, it has a high tensile resistance and internal pressure resistance, and it is possible to extend the connection length.
It is to provide a manufacturing method of P pipe.
本発明の他の目的は、相当大きな回転トルクを伝達する
ことができ、接続長尺化が可能なFRP管の製造法を提供
することである。Another object of the present invention is to provide a method for manufacturing an FRP pipe capable of transmitting a considerably large rotational torque and capable of lengthening the connection.
問題点を解決するための手段 上記諸目的は本発明に係るFRP管の製造法によつて達成
される。要約すれば本発明は、所定の長さ及び断面形状
を有し、長手方向中心部で分割可能な細長のマンドレル
を用意し、該マンドレル上に樹脂含浸繊維を巻き付け、
所定の肉厚を有した繊維強化樹脂層を形成する工程、該
繊維強化樹脂層を硬化する工程、次いで、前記マンドレ
ルをその中心部で分離することにより、前記繊維強化樹
脂層の両端部から長手方向外方へとそれぞれ引抜く工
程、を有することを特徴とする繊維強化複合樹脂管の製
造法である。Means for Solving the Problems The above-mentioned objects are achieved by the method for manufacturing an FRP pipe according to the present invention. In summary, the present invention provides an elongated mandrel having a predetermined length and cross-sectional shape, which is divisible at the center in the longitudinal direction, and winding resin-impregnated fiber on the mandrel.
A step of forming a fiber-reinforced resin layer having a predetermined wall thickness, a step of curing the fiber-reinforced resin layer, and then separating the mandrel at the center thereof so that the length from both ends of the fiber-reinforced resin layer is increased. The method for producing a fiber-reinforced composite resin pipe is characterized in that it has a step of pulling outward in each direction.
実施例 次に、本発明に係るFRP管の製造法を図面に側して更に
詳しく説明する。Example Next, a method for manufacturing an FRP pipe according to the present invention will be described in more detail with reference to the drawings.
第１図には本発明にて製造されるFRP管の一実施例が示
される。このFRP管１は、繊維強化樹脂にて形成された
中空管２と、該中空管２の両端部分に取付けられた所定
の長さを有する管接続用の金属製短管４、６とを有す
る。一方の金属製短管４は端部に凹所4aが形成され、他
方の金属製短管６には端部に前記凹所4aに嵌合し得る凸
部6aが形成される。従つて、斯る構成のFRP管は一つのF
RP管の金属短管の凹所4aと他のFRP管の凸部６を係合せ
しめることにより複数本を互いに接続し長尺化すること
ができる。FIG. 1 shows an embodiment of the FRP pipe manufactured by the present invention. The FRP pipe 1 includes a hollow pipe 2 made of fiber reinforced resin, and short metal pipes 4 and 6 for pipe connection having a predetermined length attached to both end portions of the hollow pipe 2. Have. One metal short pipe 4 is formed with a recess 4a at the end thereof, and the other metal short pipe 6 is formed at the end thereof with a protrusion 6a which can be fitted into the recess 4a. Therefore, an FRP tube with such a configuration is a single FRP tube.
By engaging the concave portion 4a of the metal short pipe of the RP pipe and the convex portion 6 of the other FRP pipe, a plurality of pipes can be connected to each other and lengthened.
又、好ましくは、第１図に図示されるように、金属製短
管４、６の凹所4a及び凸部6aにはそれぞれ管接続用の雌
ねじ及び又は雄ねじを形成し、一つのFRP管の金属短管
４の雌ねじ4aと他のFRP管の金属短管６の雄ねじ6aとを
螺合させ、FRP管を複数本互いに効率よく接続し長尺化
することができる。Further, preferably, as shown in FIG. 1, female screw and / or male screw for pipe connection are respectively formed in the recesses 4a and the projections 6a of the metal short pipes 4 and 6 to form a single FRP pipe. The female screw 4a of the metal short pipe 4 and the male screw 6a of the metal short pipe 6 of another FRP pipe can be screwed together to efficiently connect a plurality of FRP pipes to each other to increase the length.
又、中空管２と金属製短管４、６との接続は、圧入、接
着剤による接合、又は螺合せしめることにより行なうこ
とができるが、圧入及び接着剤による接合の場合には、
互いに嵌合する部分の形状を円形ではなく、楕円又は多
角形の如き非円形断面とし、相当大きな回転トルクを伝
達することができるように構成することも可能である。The hollow tube 2 and the metallic short tubes 4 and 6 can be connected by press fitting, bonding with an adhesive, or screwing. In the case of pressing and bonding with an adhesive,
It is also possible to make the shapes of the fitting parts not circular but a non-circular cross section such as an ellipse or a polygon so that a considerably large rotational torque can be transmitted.
繊維強化樹脂中空管２は、強化繊維としては炭素繊維、
ガラス繊維又はアラミド繊維が使用され、マトリクス樹
脂としてはエポキシ、不飽和ポリエステル、ウレタンア
クリレート、ビニルエステル、フエノール、ポリウレタ
ン等の熱硬化性樹脂及び、ナイロン６、ナイロン66、ナ
イロン12、PBT、PET、ポリカーボネート、ポリアセター
ル、ポリフエニレンスルフアイド、ポリエーテルエーテ
ルケトン、ポリエーテルスルフアイド、ポリフエニレン
オキシド、ノリル、ポリプロピレン、ポリ塩化ビニール
等の熱可塑性樹脂が好適に使用され、またこれら樹脂の
中には充填材としてCaCO3、マイカ、Al(OH)3、タルク等
を添加しても構わない。更に耐熱性、耐侯性を改良する
ための添加剤及び着色剤等を添加することもできる。The fiber-reinforced resin hollow tube 2 is made of carbon fiber as a reinforcing fiber,
Glass fibers or aramid fibers are used, and as the matrix resin, thermosetting resins such as epoxy, unsaturated polyester, urethane acrylate, vinyl ester, phenol and polyurethane, and nylon 6, nylon 66, nylon 12, PBT, PET, polycarbonate. , Thermoplastic resins such as polyacetal, polyphenylene sulfide, polyether ether ketone, polyether sulfide, polyphenylene oxide, noryl, polypropylene, polyvinyl chloride are preferably used, and among these resins, CaCO 3 , mica, Al (OH) 3 , talc, etc. may be added as a filler. Further, additives and colorants for improving heat resistance and weather resistance can be added.
以上の構成とされる本発明に係るFRP管の製造方法を実
施例についてより具体的に説明する。The method of manufacturing the FRP pipe having the above-described structure according to the present invention will be described more specifically with reference to Examples.
実施例１ 第２図及び第３図に図示されるように、全長Ｌが2000mm
の細長マンドレル10を用意した。該マンドレル10は長手
方向中心部で二つのマンドレルユニツト10a、10bに分割
され、該二つのマンドレルユニツトの当接部10cには一
方に凸部を、他方に凹部を形成し、該凸部と凹部とを互
いに分離自在に結合することにより一体のマンドレル10
が形成される。本実施例において、マンドレル10の両端
部l1は350mmとされ、且つ第２図（Ｂ）に図示されるよ
うに、断面形状が長軸120mm、短軸100mmの楕円とされ、
中間部l2は1200mmとされ、断面形状が直径100mmの円形
とされた。中間部l2と両端部l1を連結する50mm長さの遷
移部l3は円形と楕円とを円滑に接続する態様で変形する
形状とされた。又、350mmとされる両端部l1は端部に向
けて16:1の下りテーパが設けられた。Example 1 As shown in FIGS. 2 and 3, the total length L is 2000 mm.
I prepared a slender mandrel 10. The mandrel 10 is divided into two mandrel units 10a and 10b at the center in the longitudinal direction, and the abutting portion 10c of the two mandrel units has a convex portion on one side and a concave portion on the other side, and the convex portion and the concave portion are formed. Mandrel 10 integrated by detachably connecting and
Is formed. In this embodiment, both ends l 1 of the mandrel 10 are 350 mm, and as shown in FIG. 2 (B), the cross-sectional shape is an ellipse having a major axis of 120 mm and a minor axis of 100 mm.
The intermediate portion l 2 was 1200 mm, and the cross-sectional shape was circular with a diameter of 100 mm. The 50 mm long transition part l 3 connecting the intermediate part l 2 and the both ends l 1 was deformed in such a manner as to smoothly connect the circle and the ellipse. In addition, both ends l 1 of 350 mm were provided with a 16: 1 downward taper toward the ends.
該マンドレルに対し、第４図に図示されるように、その
中間部領域1500mmにわたつて強化繊維として炭素繊維を
使用したエポキシ樹脂プリプレグを、又は強化繊維とし
て炭素繊維を使用したエポキシ樹脂フイラメント若しく
はエポキシ樹脂プリプレグテープを通常のワインデイン
グ法により巻付け、厚さ6mmの繊維強化樹脂層20を形成
した。これにより中間部（l2）1200mm、各遷移部（l3）
50mm、両端部（l1）の150mm長の部分に前記繊維強化樹
脂層20が形成された。With respect to the mandrel, as shown in FIG. 4, an epoxy resin prepreg using carbon fibers as reinforcing fibers over an intermediate region 1500 mm thereof, or an epoxy resin filament or epoxy using carbon fibers as reinforcing fibers is used. A resin prepreg tape was wound by an ordinary winding method to form a fiber-reinforced resin layer 20 having a thickness of 6 mm. As a result, the middle part (l 2 ) 1200 mm, each transition part (l 3 )
The fiber-reinforced resin layer 20 was formed in a portion having a length of 50 mm and a length of 150 mm at both ends (l 1 ).
本実施例では、前記エポキシ樹脂プリプレグ又はプリプ
レグテープを使用した場合には成形性を良くするために
これらプリプレグを圧着ローラ（図示せず）にてマンド
レル面に対し長手方向線荷重5kg/cm以上の荷重で加圧し
た。更に又、本実施例においては、巻付けられたプリプ
レグ等は楕円部分を除いて形状保持のための外装テープ
（図示せず）を巻き付け、両端楕円部分は、第５図に図
示されるような同形状の半割り金型22が装着され、プリ
プレグ等を外側より締付けて楕円形状を保つようにし
た。In the present embodiment, when the epoxy resin prepreg or prepreg tape is used, in order to improve moldability, these prepregs are pressed by a pressure roller (not shown) with a longitudinal line load of 5 kg / cm or more with respect to the mandrel surface. Pressurized with load. Furthermore, in the present embodiment, the wound prepreg and the like is wrapped with an exterior tape (not shown) for retaining the shape except for the elliptical portion, and both elliptical portions are as shown in FIG. A half mold 22 having the same shape was mounted, and a prepreg or the like was tightened from the outside so that the shape was kept elliptical.
次いで、オートクレーブを使用して該成形品を加熱硬化
した。硬化温度は樹脂によつて若干異なるが本実施例で
は10℃／分の割合で120℃〜140℃まで昇温し、２時間保
持した後、10℃／分の割合にて冷却した。Then, the molded article was heat-cured using an autoclave. Although the curing temperature is slightly different depending on the resin, in this example, the temperature was raised from 120 ° C to 140 ° C at a rate of 10 ° C / minute, held for 2 hours, and then cooled at a rate of 10 ° C / minute.
冷却後両端部の半割金型22を取り外し、中間部テープを
取り除いた後マンドレルを中心部で分離すべく両端部両
方向より引き合つて分離し、且つ前記繊維強化樹脂層20
から軸線方向外方へと抜きとつた。これにより、第６図
に図示されるように、断面が円形をした1200mmの中間部
l2と、断面が楕円形をした150mmの両端部l1とを有した
炭素繊維強化樹脂中空管２が得られた。After cooling, the half dies 22 at both ends are removed, the intermediate tape is removed, and then the mandrel is separated by pulling from both directions to separate the mandrel at the center, and the fiber reinforced resin layer 20.
From the outside in the axial direction. As a result, as shown in Fig. 6, the 1200 mm middle part having a circular cross section.
A carbon fiber reinforced resin hollow tube 2 having l 2 and 150 mm both ends l 1 having an elliptical cross section was obtained.
本発明の製造方によれば、上述のように、両端部の径が
長手方向中心部の径より大きなマンドレル10を使用し、
そしてこのマンドレル10を中心部で分割可能とすること
により、マンドレル10を繊維強化樹脂中空管２の長手方
向外方向へと引抜いて取り出すことが可能となり、両端
部の内径が中心部の内径より大きな繊維強化樹脂中空管
２を好適に製造することができる。According to the manufacturing method of the present invention, as described above, the mandrel 10 whose diameter at both ends is larger than the diameter at the central portion in the longitudinal direction is used,
By making the mandrel 10 separable at the central portion, the mandrel 10 can be pulled out toward the outer side in the longitudinal direction of the fiber reinforced resin hollow tube 2 and taken out, and the inner diameters of both end portions are larger than the inner diameter of the central portion. The large fiber-reinforced resin hollow tube 2 can be suitably manufactured.
本発明に従い、繊維強化樹脂中空管２の両端部に所定の
長さを有した管接続用の金属製短管が接着剤で取り付け
られた。管接続用金属製短管は、第７図及び第８図に図
示されるように、雄ねじ短管６と、雌ねじ短管４とから
成り、各端管とも本実施例では全長300mmとされた。According to the present invention, short metal pipes for pipe connection having a predetermined length were attached to both ends of the fiber-reinforced resin hollow pipe 2 with an adhesive. As shown in FIGS. 7 and 8, the metallic short pipe for pipe connection is composed of a male screw short pipe 6 and a female screw short pipe 4, and each end pipe has a total length of 300 mm in this embodiment. .
更に説明すれば、雄ねじ短管６は、第７図に図示するよ
うに、片方の端部6bは、長さ150mmにわたつて外形が直
径150mmの円形状とされ、内側部分は、片方の端部から1
00mmの長さ部分は長径132mm、短径112mmの楕円断面形状
とされ、且つ本実施例では、前記繊維強化樹脂中空管の
両端部外形状と合致するように長手方向に16:1のテーパ
が形成される。もう一方の片短部6aは、端部から150mm
の部分は、その内側形状が内径100mmの真円断面とさ
れ、外形状は例えばJIS.PF5に規定される管用平行雄ね
じが形成される。又、該短管の内側の前記楕円形状部と
真円形状部との間の遷移部6c（50mm長）は両形状を円滑
に接続する形状とされた。To explain further, as shown in FIG. 7, the male threaded short pipe 6 has one end 6b having a circular shape with a diameter of 150 mm over a length of 150 mm, and the inner part has one end. Part 1
The 00 mm long portion has an elliptical cross-sectional shape with a long diameter of 132 mm and a short diameter of 112 mm, and in this embodiment, a taper of 16: 1 is applied in the longitudinal direction so as to match the outer shape of both ends of the fiber-reinforced resin hollow tube. Is formed. The other short piece 6a is 150 mm from the end
The inner shape of the portion is a true circular cross section with an inner diameter of 100 mm, and the outer shape is a parallel male screw for a pipe defined by JIS.PF5, for example. The transition portion 6c (50 mm long) between the elliptical portion and the perfect circular portion on the inner side of the short tube is formed to smoothly connect both shapes.
又、雌ねじ短管４は、第８図に図示されるように、外形
は全長にわたつて直径150mmの円形状とされ、片端部4b
の内側形状は端部から100mm長の部分は雄ねじ短管６と
同様に、長径132mm、短径112mmの楕円断面形状とされ、
且つ本実施例では、前記繊維強化樹脂中空管２の両端部
外形状と合致するように長手方向に16:1のテーパが形成
される。もう一方の片端部4aの内側形状は、端部から15
0mmの部分は、例えばJIS.PF5管用平行雌ねじが形成され
る。又、該短管の内側の前記楕円形状部と雌ねじ部との
間の遷移部4c（50mm長）は両形状を円滑に接続する形状
とされた。As shown in FIG. 8, the female threaded short tube 4 has an outer shape of a circular shape with a diameter of 150 mm over the entire length, and one end 4b.
The inner shape of the part is 100 mm long from the end, like the male screw short tube 6, and has an elliptical cross-section with a long diameter of 132 mm and a short diameter of 112 mm.
In addition, in this embodiment, a 16: 1 taper is formed in the longitudinal direction so as to match the outer shape of both ends of the fiber-reinforced resin hollow tube 2. The inner shape of the other end 4a is 15
A parallel female screw for JIS.PF5 pipe is formed in the 0 mm portion. Further, the transition portion 4c (50 mm long) between the elliptical portion and the female screw portion inside the short pipe is formed into a shape that smoothly connects both shapes.
上述のように構成された繊維強化樹脂中空管２の両端部
外形状部に、上記構成の雄ねじ短管６及び雌ねじ短管４
とが合致するように適合して接着剤で固着され、本発明
に従つた繊維強化複合樹脂管１が形成された。The male screw short pipe 6 and the female screw short pipe 4 having the above-described configurations are provided on the outer shape portions of both ends of the fiber-reinforced resin hollow pipe 2 configured as described above.
Were fitted and glued together to form a fiber reinforced composite resin tube 1 according to the invention.
本実施例では、各短管の内側の前記楕円形状部と真円形
状部との間に遷移部4c、6cが形成されたが、短管の内側
の楕円形状部と真円形状部とを実質的に同径とすること
により遷移部をなくすることもできる。In this embodiment, the transition portions 4c and 6c are formed between the elliptical portion and the perfect circular portion on the inside of each short pipe, but the elliptical portion and the perfect circular portion on the inner side of the short pipe are formed. The transition portion can be eliminated by making the diameters substantially the same.
発明の効果 本発明の製造法によれば、両端部の径が長手方向中心部
の径より大きなマンドレルを使用し、そしてこのマンド
レルが中心部で分離可能とされるので、マンドレルを繊
維強化樹脂中空管の長手方向外方向へと引抜いて取り出
すことが可能となり、両端部の内径が中心部の内径より
大きな繊維強化樹脂中空管を好適に製造することができ
る。EFFECTS OF THE INVENTION According to the production method of the present invention, a mandrel whose both ends have a diameter larger than the diameter of the central portion in the longitudinal direction is used, and the mandrel is separable in the central portion. It becomes possible to pull out the hollow pipe in the outer direction in the longitudinal direction, and to take out the hollow pipe, and it is possible to suitably manufacture the fiber-reinforced resin hollow pipe in which the inner diameters of both end portions are larger than the inner diameter of the central portion.
第１図は、本発明の製造法にて製造されるFRP管の一実
施例の断面図である。 第２図（Ａ）及び（Ｂ）は、それぞれ第１図の本発明に
従つてFRP管を製造する際に使用するマンドレルの正面
図及び右側端面図である。 第３図（Ａ）及び（Ｂ）は、それぞれ第１図の本発明に
従つてFRP管を製造する際に使用するマンドレルの平面
図及び右側端面図である。 第４図は、マンドレルに繊維強化樹脂層を形成した状態
を示す正面図である。 第５図は、繊維強化樹脂層の端部を締付けるための金型
の斜視図である。 第６図は、本発明の製造法にて製造された繊維強化樹脂
中空管の正面図である。 第７図は（Ａ）及び（Ｂ）は、それぞれ第１図のFRP管
を製造する際に使用する接続用雄ねじ短管の断面図及び
右側端面図である。 第８図は（Ａ）及び（Ｂ）は、それぞれ第１図のFRP管
を製造する際に使用する接続用雌ねじ短管の断面図及び
右側端面図である。 第９図は、本発明に従つてFRP管を製造する際に使用す
る接続用雌ねじ短管の断面図である。 第10図は、本発明に従つてFRP管を製造する際に使用す
る接続用雄ねじ短管の断面図である。 1:FRP管 2:繊維強化樹脂中空管 ４、6:管接続用金属製短管FIG. 1 is a cross-sectional view of one embodiment of the FRP pipe manufactured by the manufacturing method of the present invention. 2 (A) and 2 (B) are a front view and a right end view of a mandrel used in manufacturing the FRP pipe according to the present invention of FIG. 1, respectively. 3 (A) and 3 (B) are respectively a plan view and a right end view of a mandrel used in manufacturing the FRP pipe according to the present invention in FIG. FIG. 4 is a front view showing a state in which a fiber reinforced resin layer is formed on the mandrel. FIG. 5 is a perspective view of a mold for tightening the end portion of the fiber reinforced resin layer. FIG. 6 is a front view of the fiber-reinforced resin hollow tube manufactured by the manufacturing method of the present invention. 7 (A) and 7 (B) are a cross-sectional view and a right end view of a male screw short pipe for connection used in manufacturing the FRP pipe of FIG. 1, respectively. 8 (A) and 8 (B) are a sectional view and a right end view of a female threaded short pipe for connection used in manufacturing the FRP pipe of FIG. 1, respectively. FIG. 9 is a cross-sectional view of a female screw short pipe for connection used in manufacturing an FRP pipe according to the present invention. FIG. 10 is a cross-sectional view of a male screw short pipe for connection used when manufacturing an FRP pipe according to the present invention. 1: FRP pipe 2: Fiber reinforced resin hollow pipe 4, 6: Metal short pipe for pipe connection
Claims (2)
手方向中心部で分割可能な細長のマンドレルを用意し、
該マンドレル上に樹脂含浸繊維を巻き付け、所定の肉厚
を有した繊維強化樹脂層を形成する工程、 （ｂ）該繊維強化樹脂層を硬化する工程、次いで、 （ｃ）前記マンドレルをその中心部で分離することによ
り、前記繊維強化樹脂層の両端部から長手方向外方へと
それぞれ引抜く工程、 を有することを特徴とする繊維強化複合樹脂管の製造
法。(A) Prepare an elongated mandrel having a predetermined length and cross-sectional shape and capable of being divided at the central portion in the longitudinal direction,
A step of winding a resin-impregnated fiber around the mandrel to form a fiber-reinforced resin layer having a predetermined thickness, (b) a step of curing the fiber-reinforced resin layer, and (c) the mandrel with its central portion. And a step of pulling the fiber reinforced resin layer from both ends of the fiber reinforced resin layer outward in the longitudinal direction, respectively.
ラス繊維又はアラミド繊維であり、マトリクス樹脂はエ
ポキシ、不飽和ポリエステル、ビニルエステル等の熱硬
化性樹脂、及びナイロン６、ナイロン66、ポリカーボネ
ート、ポリアセタール、ポリフエニレンスルフアイド、
ポリプロピレン等の熱可塑性樹脂である特許請求の範囲
第１項記載の繊維強化複合樹脂管の製造法。2. The reinforcing fibers of the fiber-reinforced resin layer are carbon fibers, glass fibers or aramid fibers, and the matrix resin is a thermosetting resin such as epoxy, unsaturated polyester or vinyl ester, and nylon 6, nylon 66 or polycarbonate. , Polyacetal, polyphenylene sulfide,
The method for producing a fiber-reinforced composite resin pipe according to claim 1, which is a thermoplastic resin such as polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61314295A JPH0723755B2 (en) | 1986-12-26 | 1986-12-26 | Manufacturing method of fiber reinforced composite resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61314295A JPH0723755B2 (en) | 1986-12-26 | 1986-12-26 | Manufacturing method of fiber reinforced composite resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63167185A JPS63167185A (en) | 1988-07-11 |
| JPH0723755B2 true JPH0723755B2 (en) | 1995-03-15 |
Family
ID=18051643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61314295A Expired - Lifetime JPH0723755B2 (en) | 1986-12-26 | 1986-12-26 | Manufacturing method of fiber reinforced composite resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723755B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013105748A1 (en) * | 2012-01-11 | 2013-07-18 | (주)엘지하우시스 | Method for hybrid-winding thermoplastic-continuous fiber hybrid composite, high-pressure container using same, and method for manufacturing high-pressure container |
| KR101596729B1 (en) * | 2015-09-07 | 2016-02-24 | 대한민국 | Setting device of net fiber for acquiring samples used for elasticity test |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0729353Y2 (en) * | 1990-09-20 | 1995-07-05 | 株式会社クボタ | Structure of reinforced plastic composite pipe for tunnel piping |
| GB2503938B (en) * | 2012-07-13 | 2017-08-02 | Crompton Tech Group Ltd | Composite tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148645A (en) * | 1981-03-09 | 1982-09-14 | Toho Beslon Co | Fiber reinforced plastic pipe and its joining method |
-
1986
- 1986-12-26 JP JP61314295A patent/JPH0723755B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013105748A1 (en) * | 2012-01-11 | 2013-07-18 | (주)엘지하우시스 | Method for hybrid-winding thermoplastic-continuous fiber hybrid composite, high-pressure container using same, and method for manufacturing high-pressure container |
| KR101407800B1 (en) * | 2012-01-11 | 2014-06-19 | 주식회사 이노컴 | Hybrid winding method of hybrid composites that is thermoplastic-continuous fiber and high pressure vessel using the same and method for manufacturing the same |
| TWI511867B (en) * | 2012-01-11 | 2015-12-11 | Lg Hausys Ltd | Hybrid winding method of thermoplastic plastic-continuous fiber mixed composite and high-pressure container using the same, and preparation method thereof |
| KR101596729B1 (en) * | 2015-09-07 | 2016-02-24 | 대한민국 | Setting device of net fiber for acquiring samples used for elasticity test |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63167185A (en) | 1988-07-11 |
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