JPH102461A - Reinforced resin pipe and method of manufacturing the same - Google Patents
Reinforced resin pipe and method of manufacturing the sameInfo
- Publication number
- JPH102461A JPH102461A JP8152469A JP15246996A JPH102461A JP H102461 A JPH102461 A JP H102461A JP 8152469 A JP8152469 A JP 8152469A JP 15246996 A JP15246996 A JP 15246996A JP H102461 A JPH102461 A JP H102461A
- Authority
- JP
- Japan
- Prior art keywords
- uncured
- layer
- intermediate layer
- resin
- thermosetting resin
- 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.)
- Pending
Links
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
(57)【要約】
【課題】軽量で取扱性に優れた強化樹脂管および中間層
の肉厚を自由にコントロールすることができるととも
に、製造設備の小型化を図ることができる強化樹脂管の
製造方法を提供することを目的としている。
【解決手段】周方向に回転しつつ軸方向に移動する芯型
上に、非発泡性熱硬化性樹脂が未硬化状態で含浸された
補強繊維材料を連続的に供給して未硬化内面層を形成
し、この未硬化内面層の上に、発泡性熱硬化性樹脂が未
硬化未発泡の状態で含浸された補強繊維材料を連続的に
供給して未硬化中間層を形成し、この未硬化中間層の上
に非発泡性熱硬化性樹脂が未硬化状態で含浸された補強
繊維材料を連続的に供給して未硬化外面層を形成し、そ
の後加熱して、未硬化内面層および未硬化外面層中の非
発泡性熱硬化性樹脂を硬化させるようにした。
(57) [Summary] [Problem] To manufacture a reinforced resin pipe that is lightweight and has excellent handleability and that can freely control the thickness of an intermediate layer and can reduce the size of manufacturing equipment. It is intended to provide a way. A reinforcing fiber material impregnated with a non-foamable thermosetting resin in an uncured state is continuously supplied onto a core mold that moves in the axial direction while rotating in the circumferential direction to form an uncured inner surface layer. The uncured intermediate layer is formed by continuously supplying a reinforcing fiber material impregnated with the foamable thermosetting resin in an uncured and unfoamed state on the uncured inner surface layer to form an uncured intermediate layer. An uncured outer layer is formed by continuously supplying a reinforcing fiber material impregnated with a non-foamable thermosetting resin in an uncured state on the intermediate layer, and then heated to form an uncured inner layer and an uncured layer. The non-foamable thermosetting resin in the outer layer was cured.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、強化樹脂管および
その製造方法に関する。[0001] The present invention relates to a reinforced resin pipe and a method for producing the same.
【０００２】[0002]
【従来の技術】近年、大口径の下水管や、小規模河川の
代替用途として、樹脂モルタル（レジンモルタル）等か
らなる中間層の内外面に、長尺のガラス繊維からなる補
強繊維と熱硬化性樹脂とからなる強化樹脂層が積層され
ているサンドイッチ構造の強化樹脂管が用いられてい
る。2. Description of the Related Art In recent years, as a substitute for large-diameter sewage pipes and small-scale rivers, reinforcing fibers made of long glass fibers and thermosetting have been applied to the inner and outer surfaces of an intermediate layer made of resin mortar (resin mortar). A reinforced resin tube having a sandwich structure in which a reinforced resin layer made of a conductive resin is laminated is used.
【０００３】このような強化樹脂管は、金属管やコンク
リート管に比べて軽量で施工性にも優れている。また、
内外面がＦＲＰで形成されているため、かなりの耐磨耗
性を備えている。[0003] Such a reinforced resin pipe is lighter and more excellent in workability than a metal pipe or a concrete pipe. Also,
Since the inner and outer surfaces are formed of FRP, they have considerable wear resistance.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この強
化樹脂管が、いくら金属管やコンクリート管に比べて軽
量であると言っても、中間層となる樹脂モルタルの比重
が２〜２．５と大きく、たとえば、内径がφ１５０mmの
小口径管においても、管の重量が２ｍ管で３０kgと、作
業上、大人一人の作業限界と言われている２０kgに比べ
まだまだ重いものになっている。However, even though this reinforced resin pipe is lighter in weight than a metal pipe or a concrete pipe, the specific gravity of the resin mortar serving as the intermediate layer is as large as 2 to 2.5. For example, even a small-diameter pipe having an inner diameter of 150 mm has a weight of 30 kg for a 2 m pipe, which is still heavier than 20 kg, which is said to be the working limit of one adult.
【０００５】また、従来の強化樹脂管は、特公昭５９−
１１７７号公報に開示されているように、周方向に回転
しつつ軸方向に移動する芯型上に、内面層を形成する補
強繊維と未硬化熱硬化性樹脂と含む未硬化樹脂材料を層
状に供給して、未硬化内面層を形成し、この未硬化内面
層の上に、樹脂モルタルを層状に供給して、未硬化中間
層を形成し、この未硬化中間層の上に外面層を形成する
補強繊維と未硬化熱硬化性樹脂と含む未硬化樹脂材料を
層状に供給して、未硬化外面層を形成して芯型上に筒状
体を形成したのち、この筒状体を加熱して各層を形成す
る熱硬化性樹脂を硬化させることよって製造されてい
る。Further, a conventional reinforced resin pipe is disclosed in
As disclosed in Japanese Patent No. 1177, an uncured resin material containing a reinforcing fiber forming an inner surface layer and an uncured thermosetting resin is layered on a core mold that moves in the axial direction while rotating in the circumferential direction. Supply, form an uncured inner surface layer, supply resin mortar in a layer on this uncured inner surface layer, form an uncured intermediate layer, and form an outer surface layer on this uncured intermediate layer An uncured resin material containing a reinforcing fiber to be cured and an uncured thermosetting resin is supplied in layers, an uncured outer surface layer is formed to form a tubular body on a core mold, and then the tubular body is heated. It is manufactured by curing a thermosetting resin forming each layer by using the above method.
【０００６】しかし、この強化樹脂管の製造方法におい
て、樹脂モルタルを未硬化内面層上に供給し未硬化中間
層を形成するには、通常、押出巻付け法やロール展圧法
が採用されているが、いずれの方法も、重量の重い未硬
化状態の樹脂モルタルを型に巻き付けるようになってい
るため、樹脂モルタルを型上に保持するために、積層肉
厚に限界がある。また、樹脂モルタルの押出装置や展圧
ロール等の装置を芯型に沿うように別途設けなければな
らず、製造装置が大きくなると言った点もあり、経済
的、装置の設置スペース的にも問題がある。However, in this method of manufacturing a reinforced resin tube, in order to supply the resin mortar onto the uncured inner surface layer to form an uncured intermediate layer, an extrusion winding method or a roll expansion method is usually employed. However, in each of the methods, a heavy uncured resin mortar is wound around a mold, so that the thickness of the laminated layer is limited in order to hold the resin mortar on the mold. In addition, a device such as a resin mortar extruding device or an extruding roll must be separately provided along the core mold, so that the manufacturing device becomes large, and there are problems in terms of economy and installation space of the device. There is.
【０００７】本発明は、このような事情に鑑みて、軽量
で取扱性に優れた強化樹脂管および中間層の肉厚を自由
にコントロールすることができるとともに、製造設備の
小型化を図ることができる強化樹脂管の製造方法を提供
することを目的としている。In view of such circumstances, the present invention can freely control the thickness of a reinforced resin pipe and an intermediate layer which are lightweight and excellent in handleability, and can reduce the size of manufacturing equipment. It is an object of the present invention to provide a method for manufacturing a reinforced resin pipe that can be used.
【０００８】[0008]
【課題を解決するための手段】このような目的を達成す
るために、本発明にかかる強化樹脂管は、補強繊維と非
発泡熱硬化性樹脂とからなる強化樹脂製の内面層と外面
層との間に、繊維で補強された熱硬化性樹脂発泡体から
なる中間層が形成されている構成とした。In order to achieve the above object, a reinforced resin pipe according to the present invention comprises an inner surface layer and an outer surface layer made of a reinforced resin comprising a reinforcing fiber and a non-foamed thermosetting resin. Between them, an intermediate layer made of a thermosetting resin foam reinforced with fibers was formed.
【０００９】一方、本発明にかかる強化樹脂管の製造方
法は、芯型上に、非発泡性熱硬化性樹脂が未硬化状態で
含浸された補強繊維材料を連続的に供給して未硬化内面
層を形成し、この未硬化内面層の上に、発泡性熱硬化性
樹脂が未硬化未発泡の状態で含浸された補強繊維材料を
連続的に供給して未硬化中間層を形成し、この未硬化中
間層の上に非発泡性熱硬化性樹脂が未硬化状態で含浸さ
れた補強繊維材料を連続的に供給して未硬化外面層を形
成して筒状の予備成形体を連続的に得たのち、この予備
成形体を加熱して、未硬化内面層および未硬化外面層中
の非発泡性熱硬化性樹脂を硬化させるとともに、未硬化
中間層中の発泡性熱硬化性樹脂を発泡硬化させる構成と
した。On the other hand, the method for producing a reinforced resin pipe according to the present invention is characterized in that a reinforcing fiber material impregnated with a non-foamable thermosetting resin in an uncured state is continuously supplied onto a core mold to form an uncured inner surface. Forming a layer, on the uncured inner surface layer, a foaming thermosetting resin is continuously supplied with a reinforcing fiber material impregnated in an uncured and unfoamed state to form an uncured intermediate layer, A non-foamable thermosetting resin is continuously supplied on the uncured intermediate layer with a non-foamed thermosetting resin impregnated in an uncured state to form an uncured outer layer and continuously form a cylindrical preform. After being obtained, the preformed body is heated to cure the non-foamable thermosetting resin in the uncured inner layer and the uncured outer layer, and to foam the foamable thermosetting resin in the uncured intermediate layer. It was configured to be cured.
【００１０】また、上記製造方法において、芯型を周方
向に回転しつつ軸方向に移動させるようにすることが好
ましい。上記強化樹脂管およびその製造方法の構成にお
いて、内外面層を形成する熱硬化性樹脂としては、特に
限定されないが、不飽和ポリエステル樹脂、エポキシ樹
脂等が挙げられる。In the above-mentioned manufacturing method, it is preferable that the core is moved in the axial direction while rotating in the circumferential direction. In the configuration of the reinforced resin tube and the method of manufacturing the same, the thermosetting resin forming the inner and outer surface layers is not particularly limited, and examples thereof include an unsaturated polyester resin and an epoxy resin.
【００１１】補強繊維としては、たとえば、ガラス繊
維、合成樹脂繊維、天然繊維、カーボン繊維、金属繊維
等が挙げられるが、ガラス繊維が好適に用いられる。補
強繊維の形状としては、特に限定されず、たとえば、ス
トランド状、マット状、クロス状になったものが用いら
れる。Examples of the reinforcing fiber include glass fiber, synthetic resin fiber, natural fiber, carbon fiber, metal fiber and the like, and glass fiber is preferably used. The shape of the reinforcing fibers is not particularly limited, and for example, strands, mats, and cloths are used.
【００１２】中間層を構成する熱硬化性樹脂発泡体の発
泡倍率は、特に限定されないが、１〜３倍程度の低倍率
とすることが好ましい。一方、中間層を構成する発泡性
熱硬化性樹脂としては、特に限定されないが、一般にポ
リウレタン樹脂が用いられるが、フェノール樹脂、尿素
樹脂、ビラニール樹脂、シリコーン樹脂、イミド樹脂等
に公知の発泡剤を添加したものなども用いることができ
る。The expansion ratio of the thermosetting resin foam constituting the intermediate layer is not particularly limited, but is preferably set to a low ratio of about 1 to 3 times. On the other hand, as the foamable thermosetting resin constituting the intermediate layer, although not particularly limited, a polyurethane resin is generally used, and a known foaming agent is used for a phenol resin, a urea resin, a vinylane resin, a silicone resin, an imide resin, and the like. Those added can also be used.
【００１３】[0013]
【発明の実施の形態】以下に、本発明の実施の形態を、
図面を参照しつつ詳しく説明する。図１は、本発明にか
かる強化樹脂管の実施の形態をあらわしている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a reinforced resin pipe according to the present invention.
【００１４】図１に示すように、この強化樹脂管１は、
内面層２，中間層（芯材層）３，外面層４の３層からな
っていて、内面層２および外面層４がそれぞれ非発泡性
熱硬化性樹脂と補強繊維とを含む樹脂材料によって形成
され、中間層３が補強繊維を含む発泡熱硬化性樹脂によ
って形成されている。すなわち、この強化樹脂管１は、
中間層３が比重が２〜２．５の樹脂モルタルに代えて比
重が０．５〜１程度の発泡熱硬化性樹脂によって形成さ
れているため、軽量で取扱性に優れている。As shown in FIG. 1, this reinforced resin tube 1
The inner layer 2, the intermediate layer (core layer) 3, and the outer layer 4 are formed of three layers, and the inner layer 2 and the outer layer 4 are each formed of a resin material containing a non-foamable thermosetting resin and a reinforcing fiber. The intermediate layer 3 is made of a foamed thermosetting resin containing reinforcing fibers. That is, this reinforced resin pipe 1
Since the mid layer 3 is formed of a foamed thermosetting resin having a specific gravity of about 0.5 to 1 instead of a resin mortar having a specific gravity of 2 to 2.5, it is lightweight and has excellent handleability.
【００１５】図２は、本発明にかかる強化樹脂管の製造
方法の実施の形態をあらわしている。この強化樹脂管の
製造方法は、図２に示すようなドロストホルム式の成形
装置５を用いる。FIG. 2 shows an embodiment of a method for manufacturing a reinforced resin pipe according to the present invention. The method for manufacturing the reinforced resin pipe uses a dross-holm type molding apparatus 5 as shown in FIG.
【００１６】すなわち、この装置５は、装置本体５１か
ら水平方向に延出された回転軸５２を有している。この
回転軸５２には、回転軸５２を中心にして回転するよう
に円筒形の金型（マンドレル）５３の基端部が連結され
ている。金型５３は、その先端が開放され、開放端部が
硬化炉６内に挿入されているとともに、外周面に無端の
スチールベルト５４が螺旋状に巻回されている。That is, the device 5 has a rotating shaft 52 extending horizontally from the device body 51. A base end of a cylindrical mold (mandrel) 53 is connected to the rotating shaft 52 so as to rotate about the rotating shaft 52. The mold 53 has an open end, an open end inserted into the curing furnace 6, and an endless steel belt 54 spirally wound around the outer peripheral surface.
【００１７】螺旋状のスチールベルト５４は、金型５３
の回転に伴って金型５３の表面に沿って金型５３の先端
部である開放端部側へと移動し、金型５３の開放端部に
到達したのち、金型５３の内部を通って装置本体５１側
へ戻されて、再度、金型５３に巻回されるようになって
いて、その外周面が周方向に回転しつつ軸方向に移動す
る芯型５５を構成するようになっている。The spiral steel belt 54 is connected to a mold 53.
With the rotation of the mold 53, it moves along the surface of the mold 53 toward the open end, which is the tip of the mold 53, reaches the open end of the mold 53, and passes through the inside of the mold 53. The core die 55 is returned to the apparatus main body 51 side and wound around the mold 53 again, and the outer peripheral surface of the core die 55 moves in the axial direction while rotating in the circumferential direction. I have.
【００１８】そして、この製造方法では、まず、芯型５
５上に、内面層２となる非発泡性の熱硬化性樹脂を含浸
させたガラス繊維からなる成形材料Ｘを芯型５５の回転
と移動に伴って連続的に巻回して図３（ａ）に示すよう
に未硬化内面層２１を形成し、この未硬化内面層２１の
上に発泡性熱硬化性樹脂を含浸させたガラス繊維からな
る成形材料Ｙ連続的に巻回して図３（ｂ）に示すように
未硬化中間層３１を形成し、この未硬化中間層３１の上
に、非発泡性の熱硬化性樹脂を含浸させたガラス繊維か
らなる成形材料Ｚを連続的に巻回して図３（ｃ）に示す
ように未硬化外面層４１を形成する。In this manufacturing method, first, the core mold 5
5 is formed by continuously winding a molding material X made of glass fiber impregnated with a non-foamable thermosetting resin to be the inner surface layer 2 as the core mold 55 rotates and moves. As shown in FIG. 3, an uncured inner surface layer 21 is formed, and a molding material Y made of glass fiber impregnated with a foamable thermosetting resin is continuously wound on the uncured inner surface layer 21 to obtain a structure shown in FIG. As shown in FIG. 2, an uncured intermediate layer 31 is formed, and a molding material Z made of glass fiber impregnated with a non-foamable thermosetting resin is continuously wound on the uncured intermediate layer 31. An uncured outer surface layer 41 is formed as shown in FIG.
【００１９】さらに、この未硬化内面層２１、未硬化中
間層３１および未硬化外面層４１からなる筒状の予備成
形体７を芯型５５の移動に伴って硬化炉６内に挿入し、
加熱することによって、図１および図３（ｄ）に示す強
化樹脂管１を得るようになっている。すなわち、硬化炉
６内では、未硬化内面層２１および未硬化外面層４１
が、熱硬化性樹脂が熱硬化して内面層２および外面層４
となるとともに、未硬化中間層３１が発泡硬化して中間
層３となる。Further, the cylindrical preform 7 composed of the uncured inner layer 21, the uncured intermediate layer 31, and the uncured outer layer 41 is inserted into the curing furnace 6 as the core mold 55 moves.
By heating, a reinforced resin tube 1 shown in FIGS. 1 and 3D is obtained. That is, in the curing furnace 6, the uncured inner layer 21 and the uncured outer layer 41
However, when the thermosetting resin is thermoset, the inner layer 2 and the outer layer 4
And the uncured intermediate layer 31 is foamed and cured to form the intermediate layer 3.
【００２０】また、硬化炉６から連続的に押し出されて
くる強化樹脂管１は、必要な長さに適宜切断される。Further, the reinforced resin pipe 1 continuously extruded from the curing furnace 6 is appropriately cut to a required length.
【００２１】この製造方法によれば、上記強化樹脂管１
を連続的に製造することができるとともに、従来の樹脂
モルタルを用いた強化樹脂管のように、押出装置や展圧
ロールを用いなくても、中間層３を形成することがで
き、製造装置の小型化が図れる。また、成形材料Ｙ中の
ガラス繊維の厚さ等を変更することによって容易にかつ
自由に中間層３の厚みを変更することがてきる。According to this manufacturing method, the reinforced resin pipe 1
Can be continuously manufactured, and the intermediate layer 3 can be formed without using an extruder or an extruding roll as in a conventional reinforced resin pipe using a resin mortar. The size can be reduced. Further, the thickness of the intermediate layer 3 can be easily and freely changed by changing the thickness or the like of the glass fiber in the molding material Y.
【００２２】[0022]
【実施例】以下に、本発明を、その実施例を参照しつつ
より詳しく説明する。The present invention will be described below in more detail with reference to examples.
【００２３】（実施例１）図２に示す装置５の７０ｍ／
時の成形速度（芯型５５の軸方向の移動速度）の芯型５
５上に、まず、不飽和ポリエステル樹脂が含浸されたガ
ラスロービング（２２００ＴＥＸ）を巻回し、厚み１．
５mmの未硬化内面層２１を形成した。つぎに、この未硬
化内面層２１の上にウレタン樹脂が含浸されたガラス繊
維不織布（厚み１mm）を巻回し、厚み３mmの未硬化中間
層３１を形成した。(Embodiment 1) The apparatus 5 shown in FIG.
Mold 5 of molding speed at the time (movement speed of core mold 55 in the axial direction)
First, a glass roving (2200 TEX) impregnated with an unsaturated polyester resin was wound on top of
A 5 mm uncured inner surface layer 21 was formed. Next, a glass fiber nonwoven fabric (1 mm thick) impregnated with a urethane resin was wound on the uncured inner surface layer 21 to form a 3 mm thick uncured intermediate layer 31.
【００２４】さらに、この未硬化中間層３１の上に不飽
和ポリエステル樹脂が含浸されたガラスロービング（２
２００ＴＥＸ）を巻回し、厚み１．５mmの未硬化外面層
４１を形成し、外径１６０mm、内径１５０mmの予備成形
体７を成形した。そののち、８０℃の硬化炉６内に予備
成形体７を連続的に挿入し、各層の未硬化樹脂を硬化あ
るいは発泡硬化させ、図１に示すような強化樹脂管１を
得た。Further, a glass roving (2) impregnated with an unsaturated polyester resin is formed on the uncured intermediate layer 31.
200 TEX) to form an uncured outer layer 41 having a thickness of 1.5 mm, and a preform 7 having an outer diameter of 160 mm and an inner diameter of 150 mm was formed. After that, the preform 7 was continuously inserted into the curing furnace 6 at 80 ° C., and the uncured resin of each layer was cured or foamed to obtain the reinforced resin pipe 1 as shown in FIG.
【００２５】得られた強化樹脂管１は、内面層２の厚み
が１．５mm、中間層３の厚みが９〜１０mm、中間層３の
比重０．５、中間層３の発泡倍率１〜３倍、外面層４の
厚みが１．５mmであった。The obtained reinforced resin tube 1 has an inner surface layer 2 having a thickness of 1.5 mm, an intermediate layer 3 having a thickness of 9 to 10 mm, a specific gravity of the intermediate layer 3 of 0.5, and an expansion ratio of the intermediate layer 3 of 1 to 3. The thickness of the outer surface layer 4 was 1.5 mm.
【００２６】（実施例２）不織布の代わりにガラスロー
ビングを用いた以外、実施例１と同様にして強化樹脂管
１を得た。得られた強化樹脂管１は、内面層２の厚みが
１．５mm、中間層３の厚みが９〜１０mm、中間層３の比
重０．７、中間層３の発泡倍率１〜３倍、外面層４の厚
みが１．５mmであった。(Example 2) A reinforced resin tube 1 was obtained in the same manner as in Example 1 except that glass roving was used instead of the nonwoven fabric. The obtained reinforced resin tube 1 has a thickness of the inner layer 2 of 1.5 mm, a thickness of the intermediate layer 3 of 9 to 10 mm, a specific gravity of the intermediate layer 3 of 0.7, an expansion ratio of the intermediate layer 3 of 1 to 3, and an outer surface. The thickness of the layer 4 was 1.5 mm.
【００２７】（比較例１）中間層が樹脂モルタルである
内面層２の厚みが１．５mm、中間層３の厚みが９〜１０
mm、外面層４の厚みが１．５mmの強化樹脂管（ＦＲＰＭ
管）を得た。(Comparative Example 1) The thickness of the inner layer 2 in which the intermediate layer is resin mortar is 1.5 mm, and the thickness of the intermediate layer 3 is 9 to 10
mm, and the outer layer 4 has a thickness of 1.5 mm reinforced resin pipe (FRPM
Tube).
【００２８】上記実施例１，２および比較例１で得た強
化樹脂管の重量およびその強度を比較し、その結果を表
１に示した。なお、重量は、比較例１の強化樹脂管の重
量を１００とした時の比であらわし、強度は比較例１の
強化樹脂管の強度を１とした時の比であらわした。The weights and strengths of the reinforced resin tubes obtained in Examples 1 and 2 and Comparative Example 1 were compared, and the results are shown in Table 1. The weight was expressed by a ratio when the weight of the reinforced resin tube of Comparative Example 1 was set to 100, and the strength was expressed by a ratio when the strength of the reinforced resin tube of Comparative Example 1 was set to 1.
【００２９】[0029]
【表１】 [Table 1]
【００３０】上記表１から本発明の強化樹脂管は、軽量
でかつ強度的に優れていることがよく判る。From Table 1 above, it can be clearly understood that the reinforced resin pipe of the present invention is lightweight and excellent in strength.
【００３１】[0031]
【発明の効果】本発明にかかる強化樹脂管は、以上のよ
うに構成されているので、軽量で取扱性に優れている。
一方、本発明にかかる強化樹脂管の製造方法は、中間層
の肉厚を自由にコントロールすることができるととも
に、製造設備の小型化を図ることができる。As described above, the reinforced resin pipe according to the present invention is lightweight and excellent in handleability.
On the other hand, the method for manufacturing a reinforced resin pipe according to the present invention can control the thickness of the intermediate layer freely and can reduce the size of manufacturing equipment.
【図１】本発明にかかる強化樹脂管の実施の形態をあら
わし、その一部切欠正面図である。FIG. 1 is a partially cutaway front view showing an embodiment of a reinforced resin pipe according to the present invention.
【図２】本発明にかかる強化樹脂管の製造方法の実施の
形態であって、その製造装置を説明する説明図である。FIG. 2 is an embodiment of a method for manufacturing a reinforced resin pipe according to the present invention, and is an explanatory diagram illustrating a manufacturing apparatus thereof.
【図３】本発明にかかる強化樹脂管の製造方法を工程順
にあらわす図であって、同図（ａ）は図２のＡ−Ａ線断
面図、同図（ｂ）は図２のＢ−Ｂ線断面図、同図（ｃ）
は図２のＣ−Ｃ線断面図、同図（ｄ）は図２のＤ−Ｄ線
断面図である。3A and 3B are diagrams showing a method of manufacturing a reinforced resin pipe according to the present invention in the order of steps, wherein FIG. 3A is a cross-sectional view taken along line AA of FIG. 2, and FIG. B line sectional view, FIG.
2 is a sectional view taken along line CC of FIG. 2, and FIG. 2D is a sectional view taken along line DD of FIG.
１ 強化樹脂管 ２ 内面層 ２１ 未硬化内面層 ３ 中間層 ３１ 未硬化中間層 ４ 外面層 ４１ 未硬化外面層 ５５ 芯型 ６ 硬化炉 ７ 予備成形体 Ｘ 成形材料 Ｙ 成形材料 Ｚ 成形材料 DESCRIPTION OF SYMBOLS 1 Reinforced resin pipe 2 Inner layer 21 Uncured inner layer 3 Intermediate layer 31 Uncured intermediate layer 4 Outer layer 41 Uncured outer layer 55 Core type 6 Curing furnace 7 Preformed body X Molding material Y Molding material Z Molding material
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 105:08 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location B29K 105: 08
Claims (3)
強化樹脂製の内面層と外面層との間に、繊維で補強され
た熱硬化性樹脂発泡体からなる中間層が形成されている
強化樹脂管。An intermediate layer made of a thermosetting resin foam reinforced with fibers is formed between an inner surface layer and an outer surface layer made of a reinforced resin made of a reinforcing fiber and a non-foamed thermosetting resin. Are reinforced resin pipes.
状態で含浸された補強繊維材料を連続的に供給して未硬
化内面層を形成し、この未硬化内面層の上に、発泡性熱
硬化性樹脂が未硬化未発泡の状態で含浸された補強繊維
材料を連続的に供給して未硬化中間層を形成し、この未
硬化中間層の上に非発泡性熱硬化性樹脂が未硬化状態で
含浸された補強繊維材料を連続的に供給して未硬化外面
層を形成して筒状の予備成形体を連続的に得たのち、こ
の予備成形体を加熱して、未硬化内面層および未硬化外
面層中の非発泡性熱硬化性樹脂を硬化させるとともに、
未硬化中間層中の発泡性熱硬化性樹脂を発泡硬化させる
請求項１に記載の強化樹脂管の製造方法。2. An uncured inner surface layer is formed by continuously supplying a reinforcing fiber material impregnated with a non-foamable thermosetting resin in an uncured state on a core mold to form an uncured inner surface layer. The foaming thermosetting resin is continuously supplied with a reinforcing fiber material impregnated in an uncured and unfoamed state to form an uncured intermediate layer, and a non-foamable thermosetting layer is formed on the uncured intermediate layer. After continuously supplying a reinforcing fiber material impregnated with a non-cured resin in an uncured state to form an uncured outer surface layer and continuously obtaining a cylindrical preformed body, the preformed body is heated. Along with curing the non-foamable thermosetting resin in the uncured inner layer and the uncured outer layer,
The method for producing a reinforced resin tube according to claim 1, wherein the foamable thermosetting resin in the uncured intermediate layer is foamed and cured.
せる請求項２に記載の強化樹脂管の製造方法。3. The method for manufacturing a reinforced resin pipe according to claim 2, wherein the core mold is moved in the axial direction while rotating in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8152469A JPH102461A (en) | 1996-06-13 | 1996-06-13 | Reinforced resin pipe and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8152469A JPH102461A (en) | 1996-06-13 | 1996-06-13 | Reinforced resin pipe and method of manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH102461A true JPH102461A (en) | 1998-01-06 |
Family
ID=15541202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8152469A Pending JPH102461A (en) | 1996-06-13 | 1996-06-13 | Reinforced resin pipe and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH102461A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101084042B1 (en) * | 2008-12-02 | 2011-11-16 | 동원철강 주식회사 | Composite Resin Pipe Continuous Manufacturing Method |
| WO2014112822A1 (en) * | 2013-01-17 | 2014-07-24 | Korea Institute Of Ocean Science & Technology | Method for manufacturing large diameter pipe using internal frame |
-
1996
- 1996-06-13 JP JP8152469A patent/JPH102461A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101084042B1 (en) * | 2008-12-02 | 2011-11-16 | 동원철강 주식회사 | Composite Resin Pipe Continuous Manufacturing Method |
| WO2014112822A1 (en) * | 2013-01-17 | 2014-07-24 | Korea Institute Of Ocean Science & Technology | Method for manufacturing large diameter pipe using internal frame |
| KR101423937B1 (en) * | 2013-01-17 | 2014-07-28 | 한국해양과학기술원 | A method for manufacturing large diameter pipe using steel frame |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5540870A (en) | Structural element formed of a fiber reinforced thermoplastic material and method of manufacture | |
| US5871117A (en) | Tubular load-bearing composite structure | |
| US2785442A (en) | Method of making a reinforced hollow cylindrical article | |
| US4647326A (en) | Method of manufacturing a shape from a composite material | |
| JPS6292833A (en) | Manufacture of bent continuous fiber reinforced resin tube | |
| US4026747A (en) | Composite tubing | |
| US4013102A (en) | Composite tubing | |
| US3457963A (en) | Article and method of bonding reinforced rings to tubular articles | |
| JPH102461A (en) | Reinforced resin pipe and method of manufacturing the same | |
| US5352309A (en) | Method for manufacturing pipe bells | |
| JPH03251435A (en) | Frp pipe and its manufacture | |
| JP2007203723A (en) | FIBER-REINFORCED PLASTIC TUBE AND METHOD FOR PRODUCING THE SAME | |
| JPH10691A (en) | Manufacturing method of reinforced resin pipe | |
| JP3142394B2 (en) | Reinforced plastic pipe and method of manufacturing the same | |
| JPH0669733B2 (en) | Shaft-shaped member combining heat-foamable resin and carbon fiber and method for manufacturing the same | |
| JPH0249222B2 (en) | ||
| GB2222653A (en) | Hollow tubular structures of fibre reinforced plastics material and method for their production | |
| JPH01166936A (en) | Long-sized, thin, hollow and carbon fiber-reinforced composite resin draw molding and its manufacture | |
| JPH01166937A (en) | Long-sized, light-weight and fiber-reinforced composite draw molding and its manufacture | |
| US20020079608A1 (en) | Method of manufactuiring curved hose | |
| JPH06218852A (en) | Fiber reinforced synthetic resin composite pipe | |
| JP3078079B2 (en) | Fiber reinforced resin composite pipe for propulsion pipe and method for producing the same | |
| JPH0798350B2 (en) | Method for manufacturing fiber-reinforced synthetic resin pipe | |
| JPH0550518A (en) | Manufacturing method of composite shaft | |
| JPH058310A (en) | Manufacturing method of compound shaft |