JPH0455852B2 - - Google Patents
Info
- Publication number
- JPH0455852B2 JPH0455852B2 JP62277489A JP27748987A JPH0455852B2 JP H0455852 B2 JPH0455852 B2 JP H0455852B2 JP 62277489 A JP62277489 A JP 62277489A JP 27748987 A JP27748987 A JP 27748987A JP H0455852 B2 JPH0455852 B2 JP H0455852B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- steel pipe
- mat
- coated steel
- liquid
- 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 claims description 71
- 229920005989 resin Polymers 0.000 claims description 71
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 34
- 102100040428 Chitobiosyldiphosphodolichol beta-mannosyltransferase Human genes 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 239000004745 nonwoven fabric Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 5
- 235000011613 Pinus brutia Nutrition 0.000 description 5
- 241000018646 Pinus brutia Species 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、推進工法により地中に推進敷設し
て水道管、ガス管その他各種の用途に使用する繊
維強化樹脂被覆鋼管の製造方法に関するものであ
る。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for manufacturing fiber-reinforced resin-coated steel pipes that are propelled underground using a propulsion method and used for water pipes, gas pipes, and various other uses. It is.
従来、繊維強化樹脂管の製造方法として、ガラ
ス繊維または金属繊維からなるロービングにポリ
エステルまたはエポキシアクリレートからなる液
状の反応硬化性樹脂を含浸させて、これを回転し
ているマンドレルに巻き付けて硬化させたのち脱
型する方法が知られており、またガラス繊維また
は金属繊維の不織布からなるマツトを横向きに配
置されている鋼管の上面に人力で当接し、かつそ
のマツトに前記液状の反応硬化性樹脂を滴下して
ローラ等で押えて含浸させながら鋼管を回転し
て、その樹脂含浸マツトを鋼管に巻付ける方法も
知られている。
Conventionally, the method for producing fiber-reinforced resin pipes was to impregnate a roving made of glass fiber or metal fiber with a liquid reaction-curable resin made of polyester or epoxy acrylate, and then wrap it around a rotating mandrel and harden it. A method is known in which a mat made of a nonwoven fabric of glass fiber or metal fiber is manually brought into contact with the upper surface of a steel pipe placed horizontally, and the liquid reaction hardening resin is applied to the mat. A method is also known in which the resin-impregnated mat is wrapped around the steel pipe by dropping the resin and rotating the steel pipe while impregnating the resin by pressing with a roller or the like.
しかるに、前記従来の繊維強化樹脂管の製造方
法の場合、ロービング自体がかなりの細物である
ので、必要膜厚になるまで巻付けるのに比較的長
い時間を必要とする。
However, in the case of the conventional manufacturing method of fiber-reinforced resin pipes, since the roving itself is quite thin, it takes a relatively long time to wrap the roving to the required thickness.
また前記従来の繊維強化樹脂被覆鋼管の製造方
法の場合も、人手で一定寸法に裁断したマツトに
その上から液状の反応硬化性樹脂を滴下して含浸
させ、すなわち継ぎ接ぎの繰返しで所定膜厚まで
塗り重ねるので、作業時間が長くかかり、特に鋼
管の径が大きいとは作業時間が著しく長くかか
り、能率および製造コスト面で問題があつた。 In addition, in the case of the conventional manufacturing method of fiber-reinforced resin-coated steel pipes, a liquid reaction-curing resin is dripped onto the pine that has been manually cut to a certain size to impregnate it. Since the coating is repeated, it takes a long time to work, especially when the diameter of the steel pipe is large, which causes problems in terms of efficiency and manufacturing costs.
そこで、比較的厚い膜厚の繊維強化樹脂被覆を
有する鋼管を短時間で製造するためには、ガラス
繊維または金属繊維の不織布からなるマツトを、
樹脂槽内の液状反応硬化性樹脂中を通過させてそ
の樹脂をマツトに含浸させ、次いでその樹脂含浸
マツトを回転しながら管軸方向に移動している鋼
管または被覆鋼管の外周に巻付けることが考えら
れる。しかし、この場合は、マツトに液状の反応
硬化性樹脂が浸透した直後にマツトの持つている
集束バインダーが前記樹脂中成分の溶剤であるス
チレンにより溶解されて繊維の収束力を低下さ
せ、そのためマツトを構成する繊維がバラバラに
なるので、鋼管に対するマツトの巻付作業性が悪
くなつたり、巻付けられたマツトが樹脂と共に鋼
管面からずれ動いて繊維強化樹脂被覆鋼管の表面
品質が低下したり、時にはずれ落ちるなどの問題
が発生する。 Therefore, in order to manufacture steel pipes with relatively thick fiber-reinforced resin coatings in a short time, it is necessary to use mats made of nonwoven fabrics of glass fibers or metal fibers.
The mat is impregnated with the resin by passing through a liquid reaction hardening resin in a resin tank, and then the resin-impregnated mat is wrapped around the outer periphery of a steel pipe or coated steel pipe that is rotating and moving in the pipe axis direction. Conceivable. However, in this case, immediately after the liquid reaction-curing resin penetrates into the pine, the binding binder of the pine is dissolved by the styrene, which is a solvent component in the resin, reducing the convergence force of the fibers. As the fibers that make up the fibers fall apart, the workability of wrapping the pine around the steel pipe deteriorates, and the wrapped pine moves along with the resin from the surface of the steel pipe, reducing the surface quality of the fiber-reinforced resin-coated steel pipe. Sometimes problems such as falling off occur.
この発明は前述の問題を有利に解決できる繊維
強化樹脂被覆鋼管の製造方法を提供することを目
的とするものであつて、この発明の要旨とすると
ころは、ポリエステルまたはエポキシアクリレー
トからなる液状の反応硬化性樹脂を樹脂液噴霧ノ
ズルから噴霧して含浸させた繊維の不織布からな
るマツト１と、前記液状の反応硬化性樹脂を樹脂
液槽を通過させて含浸させたクロス２とを、樹脂
液含浸直後に同時に重ねて送り出して、そのクロ
ス２が外側になるように鋼管または被覆鋼管３の
外周に螺旋状に巻付けることを特徴とする繊維強
化樹脂被覆鋼管の製造方法にある。
The purpose of this invention is to provide a method for producing fiber-reinforced resin-coated steel pipes that can advantageously solve the above-mentioned problems. A mat 1 made of a nonwoven fabric of fibers impregnated with a curable resin by spraying it from a resin liquid spray nozzle, and a cloth 2 impregnated with the liquid reactive curable resin by passing it through a resin liquid tank are impregnated with a resin liquid. This method of manufacturing a fiber-reinforced resin-coated steel pipe is characterized in that immediately after that, the steel pipes are piled up and sent out at the same time, and wound spirally around the outer periphery of the steel pipe or coated steel pipe 3 so that the cloth 2 is on the outside.
次にこの発明を図示の例によつて詳細に説明す
る。
Next, the present invention will be explained in detail using illustrated examples.
図面はこの発明の一実施例を示すものであつ
て、コンクリートの床４上に前後方向に延長する
２本の走行用レール５が左右方向に間隔をおいて
敷設固定され、その走行用レール５に沿つて一定
の低速度で走行する台車６の左右両側に、それぞ
れ複数の管支承回転用ローラ７が前後方向に無被
覆対象部分に相当する間隔をおいて取付けられ、
一端部のローラが駆動装置により回転される。 The drawing shows an embodiment of the present invention, in which two running rails 5 extending in the front and rear directions are laid and fixed at intervals in the left and right direction on a concrete floor 4. A plurality of tube bearing rotation rollers 7 are installed on both left and right sides of a trolley 6 that travels at a constant low speed along
A roller at one end is rotated by a drive device.
前記床４上に設置された支持台８にクロスおよ
びマツト供給用支持用スタンド９が固定され、か
つそのスタンド９と前記台車６との間において支
持台８の上に設置された下部樹脂槽１０に、ポリ
エステルまたはエポキシアクリレートからなる液
状の反応硬化性樹脂１１が収容され、ガラス繊維
または金属繊維からなるクロス２を巻いたボビン
１２の支軸１３は、前記支持用スタンド９の下側
の溝形軸受に嵌合され、さらにガラス繊維または
金属繊維の不織布からなるマツト１を巻いたボビ
ン１４の支軸１５は、前記支持用スタンド９の上
側の溝形軸受に嵌合されている。 A support stand 9 for supplying cloth and mats is fixed to a support stand 8 installed on the floor 4, and a lower resin tank 10 is installed on the support stand 8 between the stand 9 and the trolley 6. A supporting shaft 13 of a bobbin 12 containing a liquid reactive hardening resin 11 made of polyester or epoxy acrylate and wrapped with a cloth 2 made of glass fiber or metal fiber is connected to a groove-shaped bottom of the support stand 9. A support shaft 15 of a bobbin 14, which is fitted into a bearing and further wrapped with a mat 1 made of a nonwoven fabric of glass fiber or metal fiber, is fitted into a groove-shaped bearing on the upper side of the support stand 9.
前記下部樹脂槽１０におけるスタンド側の端部
の上部にガイドローラ１６Ａが設けられ、かつ下
部樹脂槽１０における鋼管側の端部の上部にガイ
ドローラ１６Ｂが設けられると共に、そのガイド
ローラ１６Ｂの上部に絞りローラ１６Ｃが設けら
れ、また下部樹脂槽１０内の下部に浸漬用ローラ
１７が設けられ、さらに前記管支承回転用ローラ
７に設置された鋼管または被覆鋼管３と支持用ス
タンド９との間の上方に、ポリエステルまたはエ
ポキシアクリレートからなる液状の反応硬化性樹
脂１１を収容した上部樹脂槽１８が設けられ、そ
の上部樹脂槽１８に樹脂液供給管１９の上端部が
接続され、その樹脂液供給管１９の下端部には前
後方向に延長する樹脂液噴霧ノズル２０が接続さ
れている。 A guide roller 16A is provided above the end of the lower resin tank 10 on the stand side, and a guide roller 16B is provided above the end of the lower resin tank 10 on the steel pipe side. A squeezing roller 16C is provided, and an immersion roller 17 is provided at the lower part of the lower resin tank 10, and furthermore, a dipping roller 17 is provided at the lower part of the lower resin tank 10, and furthermore, a dipping roller 17 is provided at the lower part of the lower resin tank 10, and furthermore, there is a An upper resin tank 18 containing a liquid reaction-curing resin 11 made of polyester or epoxy acrylate is provided above, and the upper end of a resin liquid supply pipe 19 is connected to the upper resin tank 18. A resin liquid spray nozzle 20 extending in the front-rear direction is connected to the lower end of the resin liquid spray nozzle 19 .
図示の装置を使用して繊維強化樹脂被覆鋼管を
製造する場合は、まずボビン１４から繰り出され
ているマツト１の端部を鋼管または被覆鋼管３の
外面に対し粘着テープ等により固定すると共に、
ボビン１２から下部樹脂槽１０内を通つて繰り出
されたクロス２を前記マツト１の下面に重ねた状
態で鋼管または被覆鋼管３の外面に対し粘着テー
プ等により固定する。 When manufacturing a fiber-reinforced resin-coated steel pipe using the illustrated apparatus, first, the end of the mat 1 unwound from the bobbin 14 is fixed to the outer surface of the steel pipe or coated steel pipe 3 with adhesive tape or the like, and
The cloth 2 fed out from the bobbin 12 through the inside of the lower resin tank 10 is stacked on the lower surface of the mat 1 and fixed to the outer surface of the steel pipe or coated steel pipe 3 with adhesive tape or the like.
次に鋼管または被覆鋼管３を第１図の矢印方向
に回動させながら台車６を走行させ、かつ樹脂液
噴霧ノズル２０からマツト１に液状の反応硬化性
樹脂を噴霧して含浸させる。このようにすると、
液状の反応硬化性樹脂を含浸させたマツト１と下
部樹脂槽１０内において液状の反応硬化性樹脂を
含浸させたクロス２とが、鋼管または被覆鋼管３
の外周に螺旋状にかつクロス２がマツト１の外側
に重なるように巻付けられると共に、マツト１の
およびクロス２の巾方向の一部がそれぞれ重なる
ように巻付けられていく。 Next, the trolley 6 is run while rotating the steel pipe or coated steel pipe 3 in the direction of the arrow in FIG. 1, and the resin liquid spray nozzle 20 sprays the mat 1 with a liquid reaction-curing resin to impregnate it. In this way,
A mat 1 impregnated with a liquid reaction-curing resin and a cloth 2 impregnated with a liquid reaction-curing resin in a lower resin tank 10 are connected to a steel pipe or coated steel pipe 3.
The cloth 2 is wound spirally around the outer periphery of the mat 1 so as to overlap with the outside of the mat 1, and a portion of the mat 1 and the cloth 2 in the width direction are overlapped with each other.
前記被覆鋼管としては鋼管の外周面にポリエチ
レンまたはウレタン樹脂を一体に被覆したものを
使用する。この場合、樹脂とマツトとの一体性を
向上させるために、樹脂の表面にエンボス加工を
施しておくのが好ましい。 As the coated steel pipe, a steel pipe whose outer peripheral surface is integrally coated with polyethylene or urethane resin is used. In this case, it is preferable to emboss the surface of the resin in order to improve the integrity of the resin and the mat.
この発明を実施する場合、鋼管または被覆鋼管
を定位置で回転させ、かつ前後支持用スタンド
９、下部樹脂槽１０および上部樹脂槽１８等を台
車に搭載して管軸方向に移動させながら、液状の
反応硬化性樹脂を含浸させたマツト１およびクロ
ス２を、鋼管または被覆鋼管の外面に螺旋状に巻
付けてもよい。 When carrying out this invention, the steel pipe or coated steel pipe is rotated in a fixed position, and the front and rear support stand 9, the lower resin tank 10, the upper resin tank 18, etc. are mounted on a truck and moved in the tube axis direction, while the liquid The mat 1 and the cloth 2 impregnated with the reaction hardening resin may be helically wrapped around the outer surface of a steel pipe or coated steel pipe.
この発明によれば、ポリエステルまたはエポキ
シアクリレートからなる液状の反応硬化性樹脂を
樹脂液噴霧ノズルから噴霧して含浸させた繊維の
不織布からなるマツト１と、前記液状の反応硬化
性樹脂を樹脂液槽を通過させて含浸させたクロス
２とを、樹脂液含浸直後に同時に重ねて送り出し
て、そのクロス２が外側になるように鋼管または
被覆鋼管３の外周に螺旋状に巻付けるので繊維の
不織布からなるマツト１に液状の反応硬化性樹脂
を含浸させた直後に、その反応硬化性樹脂中成分
の溶剤であるスチレンにより前記マツト１の集束
バインダーが溶解されても、前記クロス２により
マツト１の繊維がバラバラになるのを防止するこ
とができ、そのため液状の反応硬化性樹脂を含浸
させた繊維の不織布からなる所要厚さのマツト１
を、そのマツト１の繊維が乱れないようにして前
記クロス２と共に鋼管または被覆鋼管３の外周に
容易にかつ高能率で巻付けることができるので、
優れた防食性を有する繊維強化樹脂被覆鋼管を高
能率で製造できる効果が得られる。
According to this invention, a mat 1 made of a nonwoven fabric of fibers impregnated by spraying a liquid reaction-curable resin made of polyester or epoxy acrylate from a resin liquid spray nozzle, and a resin liquid tank in which the liquid reaction-curable resin is impregnated with Immediately after impregnating with the resin liquid, the cloth 2 that has been impregnated with the resin liquid is sent out overlappingly, and is spirally wrapped around the outer circumference of the steel pipe or coated steel pipe 3 with the cloth 2 on the outside. Immediately after the mat 1 is impregnated with a liquid reaction-curing resin, even if the binding binder of the mat 1 is dissolved by styrene, which is a solvent component in the reaction-curing resin, the fibers of the mat 1 are The mat 1 of the required thickness is made of a non-woven fabric of fibers impregnated with a liquid reaction-curing resin.
can be easily and efficiently wrapped around the outer periphery of the steel pipe or coated steel pipe 3 together with the cloth 2 without disturbing the fibers of the mat 1.
It is possible to produce fiber-reinforced resin-coated steel pipes with excellent corrosion resistance with high efficiency.
第１図はこの発明を実施して繊維強化樹脂被覆
鋼管を製造している状態を示す一部縦断正面図、
第２図はその平面図、第３図は第１の一部を拡大
して示す一部縦断正面図である。
図において、１はマツト、２はクロス、３は鋼
管または被覆鋼管、６は台車、７は管支承回転用
ローラ、９は支持用スタンド、１０は下部樹脂
槽、１１は液状の熱硬化性樹脂、１２および１４
はボビン、１６Ａおよび１６Ｂはガイドローラ、
１６Ｃは絞りローラ、１７は浸漬用ローラ、１８
は上部樹脂槽、２０は樹脂液噴霧ノズルである。
FIG. 1 is a partially longitudinal front view showing a state in which a fiber-reinforced resin-coated steel pipe is manufactured by implementing the present invention;
FIG. 2 is a plan view thereof, and FIG. 3 is a partially vertical front view showing an enlarged portion of the first part. In the figure, 1 is a mat, 2 is a cloth, 3 is a steel pipe or coated steel pipe, 6 is a trolley, 7 is a tube support rotation roller, 9 is a support stand, 10 is a lower resin tank, 11 is a liquid thermosetting resin , 12 and 14
is a bobbin, 16A and 16B are guide rollers,
16C is a squeezing roller, 17 is a dipping roller, 18
2 is an upper resin tank, and 20 is a resin liquid spray nozzle.
Claims (1)
らなる液状の反応硬化性樹脂を樹脂液噴霧ノズル
から噴霧して含浸させた繊維の不織布からなるマ
ツト１と、前記液状の反応硬化性樹脂を樹脂液槽
を通過させて含浸させたクロス２とを、樹脂液含
浸直後に同時に重ねて送り出して、そのクロス２
が外側になるように鋼管または被覆鋼管３の外周
に螺旋状に巻付けることを特徴とする繊維強化樹
脂被覆鋼管の製造方法。1 A mat 1 made of a nonwoven fabric of fibers impregnated by spraying a liquid reaction-curing resin made of polyester or epoxy acrylate from a resin liquid spray nozzle, and impregnating the liquid reaction-curing resin by passing it through a resin liquid tank. Immediately after impregnating with the resin liquid, the cloth 2 is piled up and fed out at the same time.
A method for manufacturing a fiber-reinforced resin-coated steel pipe, characterized in that the fiber-reinforced resin-coated steel pipe is wound helically around the outer periphery of a steel pipe or coated steel pipe 3 so that the fibers are on the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27748987A JPH01120322A (en) | 1987-11-04 | 1987-11-04 | Preparation of steel pipe coated with fiber-reinforced resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27748987A JPH01120322A (en) | 1987-11-04 | 1987-11-04 | Preparation of steel pipe coated with fiber-reinforced resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01120322A JPH01120322A (en) | 1989-05-12 |
| JPH0455852B2 true JPH0455852B2 (en) | 1992-09-04 |
Family
ID=17584309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27748987A Granted JPH01120322A (en) | 1987-11-04 | 1987-11-04 | Preparation of steel pipe coated with fiber-reinforced resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01120322A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100829956B1 (en) * | 2006-12-19 | 2008-05-19 | 재단법인 포항산업과학연구원 | Composite member and manufacturing method thereof |
| JP6316124B2 (en) * | 2014-07-03 | 2018-04-25 | 積水化学工業株式会社 | Surface protection sheet and surface protection method of concrete structure using the surface protection sheet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS522941A (en) * | 1975-06-26 | 1977-01-11 | Mitsubishi Electric Corp | Traction elevator |
-
1987
- 1987-11-04 JP JP27748987A patent/JPH01120322A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS522941A (en) * | 1975-06-26 | 1977-01-11 | Mitsubishi Electric Corp | Traction elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01120322A (en) | 1989-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3579402A (en) | Method and apparatus for producing filament reinforced tubular products on a continuous basis | |
| US4172175A (en) | Pole construction | |
| JP4458383B2 (en) | Method and apparatus for contact coating of fiber roving pre-impregnated with ion-polymerizable resin for production of complex structure comprising ion-polymerized composite material | |
| US5225021A (en) | Process and apparatus for the continuous production of fibre-reinforced plastic hollow sections | |
| JPS591177B2 (en) | Manufacturing method of composite pipe | |
| CN105889652A (en) | Fiber winding fiber reinforced plastic pipeline structure and sand inclusion layer manufacturing method and device | |
| CN110421874B (en) | Production process and production line of high-strength fiber braided winding pultrusion pipeline | |
| AU2004281861A1 (en) | Method and apparatus for maintaining filaments in position in a filament winding process | |
| US3673028A (en) | Glass fiber container and method of construction | |
| JPH0455852B2 (en) | ||
| US3979250A (en) | Apparatus for making continuous lengths of resin tubes | |
| US3784429A (en) | Method for producing rotationally symmetrical glass fiber reinforced laminated hollow structures | |
| US3822167A (en) | Apparatus for providing resistant hollow cylindrical body members | |
| JPH04214457A (en) | Multi-roll type impregnating apparatus | |
| US3038832A (en) | Method and apparatus for the production of fiber reinforced resin tubes | |
| JPH02266916A (en) | Method and apparatus for preparing steel pipe coated with fiber reinforced resin | |
| AU596634B2 (en) | Process and apparatus for the continuous production of fibre-reinforced plastic hollow sections and plastic hollow sections | |
| US3776409A (en) | Glass fiber container and method of construction | |
| CN220638359U (en) | Building upright post maintenance device | |
| JPH08103967A (en) | Method and apparatus for manufacturing frp cylinder | |
| JPH0211507B2 (en) | ||
| US5031846A (en) | Filament winding machine | |
| JPH0890692A (en) | Tubular structure as well as its production method and device | |
| KR100326550B1 (en) | Shell of Fiberglass Reinforced Plastics barrel and manufacturing method the same | |
| JPH0599374A (en) | Reinforcing method for reinforced concrete pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |