JPH04107129A - Method for molding reinforced plastic pipe - Google Patents
Method for molding reinforced plastic pipeInfo
- Publication number
- JPH04107129A JPH04107129A JP2227335A JP22733590A JPH04107129A JP H04107129 A JPH04107129 A JP H04107129A JP 2227335 A JP2227335 A JP 2227335A JP 22733590 A JP22733590 A JP 22733590A JP H04107129 A JPH04107129 A JP H04107129A
- Authority
- JP
- Japan
- Prior art keywords
- reinforced plastic
- uneven
- layer
- plastic pipe
- core mold
- 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.)
- Granted
Links
- 239000002990 reinforced plastic Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000465 moulding Methods 0.000 title claims description 6
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 abstract description 10
- 239000004744 fabric Substances 0.000 abstract description 8
- 229920000298 Cellophane Polymers 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000004570 mortar (masonry) Substances 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 238000004804 winding Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は強化プラスチック管の成形方法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a method for forming reinforced plastic tubes.
従来の技術
従来より、強化プラスチック管（ＦＲＰ管）や強化プラ
スチック複合管（ＦＲＰＭ管）は、フィラメント・ワイ
ンディング法（ＦＷ法）や遠心成形法なとにより成形さ
れている。このうち、一般にはＦＷ法かよく用いられる
か、このＦＷ法で成形されたＦＲＰ管やＦＲＰＭ管（以
下単にＦＲＰ管という）は、流水側である内面か芯型に
接した状態で成形されるため、芯型の表面と同し程度の
高平滑性の内表面を存し、粗度係数か比較的小さい。Ｆ
ＲＰ管やＦ ＲＰ Ｍ管、塩ビ管の粗度係数は００１２
であるか、例えば、コンクリート管や鋳鉄管の粗度係数
は０．０＋３、陶管は０．０１４、コンクリートフリュ
ームは０．０１４〜０゜０１５、暗渠は０．０１５であ
る。2. Description of the Related Art Conventionally, reinforced plastic pipes (FRP pipes) and reinforced plastic composite pipes (FRPM pipes) have been molded by filament winding method (FW method), centrifugal molding method, or the like. Among these methods, the FW method is generally used, and FRP pipes and FRPM pipes (hereinafter simply referred to as FRP pipes) formed by the FW method are molded with the inner surface on the flowing water side in contact with the core mold. Therefore, it has an inner surface that is as smooth as the surface of the core mold, and its roughness coefficient is relatively small. F
The roughness coefficient of RP pipe, FRP M pipe, and PVC pipe is 0012.
For example, the roughness coefficient of a concrete pipe or a cast iron pipe is 0.0+3, a ceramic pipe is 0.014, a concrete flume is 0.014 to 0°015, and a culvert is 0.015.
発明か解決しようとする課題
しかしながら、上記のように従来のＦＲＰ管では、その
内表面か高平滑性で粗度係数か小さいため、管内を流れ
る流体の流速か大きくなり過ぎ、管路の途中にある減勢
池なとの設備を多く設けなければならないという問題か
あった。However, as mentioned above, in conventional FRP pipes, the inner surface is highly smooth and the roughness coefficient is small, so the flow velocity of the fluid flowing inside the pipe becomes too high and There was a problem with having to install a lot of equipment, such as a certain energy-reducing pond.
本発明は上記問題を解決するもので、管内を流れる流体
の流速か大きくなり過ぎる二とのない強化プラスチック
管を容易に成形できる強化プラスチック管の成形方法を
提供することを目的とするものである。The present invention solves the above problem, and aims to provide a method for molding a reinforced plastic pipe that can easily mold a unique reinforced plastic pipe in which the flow velocity of the fluid flowing inside the pipe is too high. .
課題を解決するための手段
上記問題を解決するために本発明の第一の手段は、芯型
の周りに凹凸を有する部材を巻き、この凹凸部材の周り
に、樹脂を含浸したガラス繊維を巻付けて強化プラスチ
ック管を成形し、この強化プラスチック管から芯型を抜
いた後に、前記凹凸部材を剥かして、強化プラスチック
管の内面に凹凸部を形成するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the first means of the present invention is to wrap a member having unevenness around a core mold, and to wrap glass fiber impregnated with resin around this uneven member. After the core mold is removed from the reinforced plastic tube, the uneven member is peeled off to form an uneven portion on the inner surface of the reinforced plastic tube.
また、本発明の第二の手段は、強化プラスチック管の内
面に砂状体を付着させて、砂状体よりなる凹凸部を形成
するものである。A second means of the present invention is to attach a sand-like material to the inner surface of a reinforced plastic tube to form an uneven portion made of the sand-like material.
作用
上記第一および第二の手段により、強化プラスチック管
の内面に容易に凹凸部を形成できて、平滑性か低減され
、この強化プラスチック管を用いることにより、管内を
流れる流体の流速か大きくなり過ぎることは防止される
。Effect: By the first and second means described above, unevenness can be easily formed on the inner surface of the reinforced plastic pipe, reducing the smoothness, and by using this reinforced plastic pipe, the flow velocity of the fluid flowing inside the pipe can be increased. Excessiveness is prevented.
実施例 以下、本発明の実施例を図面を参照しながら説明する。Example Embodiments of the present invention will be described below with reference to the drawings.
まず、第１図（ａ）に示すように、筒状の金属製芯型１
の周りに離型用セロハンテープ２を巻き、その上に凹凸
部３ａを有するポリエステルクロステープ３を巻く。次
に、この上に樹脂を含浸させたガラス繊維を巻きつけて
内層４を形成する。この際、内層４の内面にも凹凸部４
ａか形成される。First, as shown in FIG. 1(a), a cylindrical metal core mold 1
A release cellophane tape 2 is wrapped around the mold release cellophane tape 2, and a polyester cloth tape 3 having an uneven portion 3a is wrapped thereon. Next, the inner layer 4 is formed by winding glass fiber impregnated with resin on top of this. At this time, uneven portions 4 are also formed on the inner surface of the inner layer 4.
A is formed.
そして、内層４の周りにモルタル層を巻き付けて中間層
５を形成し、さらにこの周りに樹脂を含浸させたガラス
繊維を巻いて外層６を形成する。Then, a mortar layer is wound around the inner layer 4 to form an intermediate layer 5, and a resin-impregnated glass fiber is further wound around this to form an outer layer 6.
その後、上記のようにして形成した強化プラスチック管
から芯型ｌを抜き、さらに、ポリエステルクロステープ
３をセロハンテープ２とともに剥がす。Thereafter, the core mold 1 is removed from the reinforced plastic tube formed as described above, and the polyester cloth tape 3 is peeled off together with the cellophane tape 2.
これにより、第１図（ｂ）に示すように、ポリエステル
クロスチーブ３の凹凸部３ａを転写した凹凸部４ａか内
面に形成され、粗度係数か低減された強化プラスチック
管７か製造される。As a result, as shown in FIG. 1(b), a reinforced plastic tube 7 is manufactured in which an uneven portion 4a, which is a transfer of the uneven portion 3a of the polyester cloth tube 3, is formed on the inner surface and the roughness coefficient is reduced.
ここで、凹凸を形成するための材料としてはポリエステ
ルクロスチーブ３に限るものではなく、ポリエステルネ
ットなど、離型性に優れ、適当な強度を有するものであ
れば良く、この種の糸の繊度や密度を変えることにより
、強化プラスチック管内面の粗度係数を調整することか
できる。Here, the material for forming the unevenness is not limited to polyester cloth 3, but may be any material such as polyester net, as long as it has excellent mold releasability and suitable strength, and the fineness of this type of yarn By changing the density, the roughness coefficient of the inner surface of the reinforced plastic tube can be adjusted.
また、第２図に示すように、ＦＲＰ層からなる内層４の
内側にもモルタル層８を設けてこのモルタル層８の内面
に凹凸部８ａを形成したり、中間層５のモルタル層を設
けないでガラス繊維層のみとしたり、ポリエステルクロ
スチーブ３の周りにさらにセロハンテープを巻いたりし
てもよい。In addition, as shown in FIG. 2, a mortar layer 8 is also provided inside the inner layer 4 made of an FRP layer, and an uneven portion 8a is formed on the inner surface of this mortar layer 8, or the mortar layer of the intermediate layer 5 is not provided. Alternatively, only the glass fiber layer may be used, or cellophane tape may be further wrapped around the polyester cloth 3.
つぎに、本発明のその他の実施例を第３図により説明す
る。Next, another embodiment of the present invention will be described with reference to FIG.
この実施例では、ＦＷ法により、単なる芯型１の周りに
強化プラスチック管１０を形成し、芯型１を抜いたのち
、第３図に示すように、この強化プラスチック管１０の
内面に接着剤１１を塗布し、砂１２を接着させる。この
砂１２により、強化プラスチック管１０の内面には凹凸
部か形成され、粗度係数か低減される。In this embodiment, a reinforced plastic tube 10 is formed around a simple core mold 1 by the FW method, and after the core mold 1 is removed, an adhesive is applied to the inner surface of the reinforced plastic tube 10 as shown in FIG. 11 and adhere sand 12. This sand 12 forms irregularities on the inner surface of the reinforced plastic tube 10, reducing the roughness coefficient.
なお、砂１２の粒径や量を変えることにより、強化プラ
スチック管内面の粗度係数を調整することかできる。ま
た、接着する材料は砂１２に限るものではなく、砂のよ
うな硬度や粒度のものであればよい。Note that by changing the particle size and amount of the sand 12, the roughness coefficient of the inner surface of the reinforced plastic tube can be adjusted. Further, the material to be bonded is not limited to the sand 12, but may be any material having the hardness and grain size of sand.
発明の効果
以上のように、本発明によれば、強化プラスチック管の
内面に凹凸を容易に形成でき、この強化プラスチック管
を用いることにより、粗度係数が大きくなり、管内を流
れる流体の流速を抑えることかでき、管路の途中にある
減勢池などの設備を従来より減少させることができる。Effects of the Invention As described above, according to the present invention, unevenness can be easily formed on the inner surface of a reinforced plastic pipe, and by using this reinforced plastic pipe, the roughness coefficient becomes large, and the flow velocity of the fluid flowing inside the pipe is increased. This makes it possible to reduce the number of facilities such as energy reduction ponds in the middle of the pipeline compared to conventional methods.
第１図（ａ）および（ｂ）はそれぞれ本発明の一実施例
に係る強化プラスチック管の成形方法の工程を示す断面
図、第２図および第３図はそれぞれ本発明の他の実施例
に係る強化プラスチック管の成形方法により成形した強
化プラスチック管の断面図である。
１・・・芯型、３・・・ポリエステルクロスチーブ（凹
凸部材）、４・・・内層、４ａ・・・凹凸部、５・・・
中間層、６・・・外層、７．１０・・・強化プラスチッ
ク管、１２・・・砂。FIGS. 1(a) and (b) are cross-sectional views showing the steps of a method for forming a reinforced plastic tube according to one embodiment of the present invention, and FIGS. FIG. 2 is a cross-sectional view of a reinforced plastic pipe molded by the method for molding such a reinforced plastic pipe. DESCRIPTION OF SYMBOLS 1... Core type, 3... Polyester cross tube (uneven member), 4... Inner layer, 4a... Uneven part, 5...
Middle layer, 6... Outer layer, 7.10... Reinforced plastic pipe, 12... Sand.
Claims (1)
材の周りに、樹脂を含浸したガラス繊維を巻付けて強化
プラスチック管を成形し、この強化プラスチック管から
芯型を抜いた後に、前記凹凸部材を剥がして、強化プラ
スチック管の内面に凹凸部を形成することを特徴とする
強化プラスチック管の成形方法。 ２、強化プラスチック管の内面に砂状体を付着させて、
砂状体よりなる凹凸部を形成することを特徴とする強化
プラスチック管の成形方法。[Claims] 1. Wrap a member with unevenness around a core mold, wrap resin-impregnated glass fiber around the uneven member to form a reinforced plastic tube, and remove the core from the reinforced plastic tube. A method for molding a reinforced plastic tube, which comprises peeling off the uneven member after removing the mold to form an uneven portion on the inner surface of the reinforced plastic tube. 2. Attach sand-like material to the inner surface of the reinforced plastic tube,
A method for molding a reinforced plastic pipe, characterized by forming an uneven part made of sand-like material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2227335A JPH0639132B2 (en) | 1990-08-28 | 1990-08-28 | Molding method for reinforced plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2227335A JPH0639132B2 (en) | 1990-08-28 | 1990-08-28 | Molding method for reinforced plastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04107129A true JPH04107129A (en) | 1992-04-08 |
| JPH0639132B2 JPH0639132B2 (en) | 1994-05-25 |
Family
ID=16859198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2227335A Expired - Fee Related JPH0639132B2 (en) | 1990-08-28 | 1990-08-28 | Molding method for reinforced plastic pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639132B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7080899B2 (en) * | 2002-10-02 | 2006-07-25 | Konica Minolta Holdings, Inc. | Ink jet recording apparatus and ink jet recording method |
| JP2011011477A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding prepreg molding for hollow structure and method for molding composite material molding |
| JP2011011473A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding wing structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6155464A (en) * | 1984-08-24 | 1986-03-19 | Shimadzu Corp | Fluid pressure operated speed change gear |
-
1990
- 1990-08-28 JP JP2227335A patent/JPH0639132B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6155464A (en) * | 1984-08-24 | 1986-03-19 | Shimadzu Corp | Fluid pressure operated speed change gear |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7080899B2 (en) * | 2002-10-02 | 2006-07-25 | Konica Minolta Holdings, Inc. | Ink jet recording apparatus and ink jet recording method |
| JP2011011477A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding prepreg molding for hollow structure and method for molding composite material molding |
| JP2011011473A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding wing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0639132B2 (en) | 1994-05-25 |
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