JPS612541A - Manufacture of fiber reinforced resin pipe - Google Patents

Manufacture of fiber reinforced resin pipe

Info

Publication number
JPS612541A
JPS612541A JP59123965A JP12396584A JPS612541A JP S612541 A JPS612541 A JP S612541A JP 59123965 A JP59123965 A JP 59123965A JP 12396584 A JP12396584 A JP 12396584A JP S612541 A JPS612541 A JP S612541A
Authority
JP
Japan
Prior art keywords
mandrel
reinforced resin
resin layer
fiber
fiber reinforced
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
Application number
JP59123965A
Other languages
Japanese (ja)
Inventor
Yasuhiro Tsuchiya
泰広 土屋
Yasushi Yamazawa
靖 山沢
Maki Terada
真樹 寺田
Takayasu Niimi
新美　孝庸
Takashi Yamamoto
孝 山本
Kunihiro Matsuba
國弘 松葉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Boshoku Corp
Toyota Motor Corp
Original Assignee
Toyota Boshoku Corp
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Boshoku Corp, Toyota Motor Corp filed Critical Toyota Boshoku Corp
Priority to JP59123965A priority Critical patent/JPS612541A/en
Publication of JPS612541A publication Critical patent/JPS612541A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

PURPOSE:To eliminate the difficulty of the last mold release of an FRP pipe by using a mandrel, a circumferential surface thereof is coated with a material having the melting point slightly higher than the thermosetting temperature of a fiber reinforced resin. CONSTITUTION:A thermoplastic resin layer 2 coated onto the circumferential surface of a mandrel 1 has the melting point slightly higher than the thermosetting temperature of FRP, and a fiber reinforced resin layer 3 is laminated and formed on the coated mandrel 1. The mandrel 1 and the fiber reinforced resin layer 3 are thermoset, and the fiber reinforced resin layer 3 is cured. The thermoplastic resin layer 2 is kept at a temperature of the melting point or lower at that time. When thermosetting treatment is completed, the thermoplastic resin layer 2 is melted when it is heated at a temperature slightly higher than the thermosetting temperature, and a clearance is formed between the mandrel 1 and the thermoset fiber reinforced resin layer. When the mandrel is drawn out of a cured resin layer under the state, an FRP pipe having a predetermined shape is obtained.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、繊維強化樹脂、特に繊維強化熱硬化性樹脂（
ＦＲＰ）の管を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to fiber-reinforced resins, particularly fiber-reinforced thermosetting resins (
The present invention relates to a method for manufacturing FRP pipes.

（従来の技術） 従来、ＦＲＰ管を製造するには、一般に炭素繊維または
ガラス繊維から成るローピン夛゛に熱硬化性樹脂を含浸
させ、これを回転する金属製の芯金（マ〉・ドレル）に
案内治具により適宜厚さに巻付け、続いて熱硬化処理を
行い、しかる後に機械力を利用してマンドレルを抜取る
ようにしていた。(Prior art) Conventionally, in order to manufacture FRP pipes, a rope pin made of carbon fiber or glass fiber is impregnated with a thermosetting resin, and then a metal core is used to rotate the rope. The mandrel was wound to an appropriate thickness using a guide jig, then subjected to a heat curing treatment, and then the mandrel was removed using mechanical force.

しかるに、上記方法による場合は、硬化した繊維強化樹
脂層がマンドレルの外周面に強力に密着し、このためマ
ンドレルの抜取りすなわち脱型が困難となって、せっか
く得たＦＲＰ管に損傷を与えることが往々にしてあった
。However, when using the above method, the cured fiber-reinforced resin layer strongly adheres to the outer peripheral surface of the mandrel, making it difficult to remove the mandrel, that is, demold it, and damage the FRP pipe that has been obtained. It often happened.

か＼る弊害を避けるため、例えばマンドレルに抜き勾配
を付け、その外周面にクロムメッキを施すと共に平滑に
仕上げ、ざらに離型剤を塗布する等の対策を講じること
があったが、これによっても、特に薄肉、細径、長尺等
の管や断面角形等の異形管の製作に前記同様の困難を来
たし、かつマンドレルの製作費も大巾に増大することと
なっていた。In order to avoid such problems, measures were taken, such as creating a draft angle on the mandrel, chrome plating the outer circumferential surface, smoothing it, and applying a mold release agent roughly. However, the same difficulties arise in the production of particularly thin-walled, narrow-diameter, long-length tubes and irregularly shaped tubes such as rectangular cross-sections, and the manufacturing cost of the mandrel also increases significantly.

また、上記したごとく、脱型には機械力を利用するため
、現地製作の場合には不便であるという問題もあった。Furthermore, as mentioned above, since mechanical force is used for demolding, there is also the problem that it is inconvenient for on-site production.

（発明が解決しようとする問題点） 本発明は、ＦＲＰ管の製造において、最終脱型の困難さ
を解消しようとするもので、薄肉、細径、長尺、異形等
の管形状によらずに、品質的に優れかつ価格的に安価な
ＦＲＰ管の製造方法を確立する。(Problems to be Solved by the Invention) The present invention aims to solve the difficulty of final demolding in the production of FRP pipes, and is intended to solve the problem of final demolding in the production of FRP pipes, regardless of the shape of the pipe, such as thin wall, small diameter, long length, irregular shape, etc. First, we will establish a method for manufacturing FRP pipes that is superior in quality and inexpensive.

（問題点を解決するための具体的手段）このため本発明
は、周面に繊維強化樹脂の熱硬化温度よりわずか高目の
融点を有する材料をコーティングして成るマンドレルを
用い、該マンドレに繊維強化樹脂を積層−形成し、続い
て熱硬化処理を行い、しかる後に前記材料を加熱拳溶融
して前記マンドレルと前記熱硬化した繊維強化樹脂層と
の間に遊隙な形成することによりＦＲＰ管を製造するよ
うにした。(Specific means for solving the problem) Therefore, the present invention uses a mandrel whose peripheral surface is coated with a material having a melting point slightly higher than the thermosetting temperature of the fiber-reinforced resin. An FRP pipe is produced by laminating and forming a reinforced resin, followed by a thermosetting treatment, and then heating and melting the material to form a gap between the mandrel and the thermoset fiber reinforced resin layer. started manufacturing.

（作用） そして、上記製造方法においては、マンドレルの周面に
繊維強化樹脂よりわずか高目の融点を有する材料をコー
ティングしたので、熱硬化処理時には所定の形状を維持
して製品形状を保証し、熱硬化後の加熱麩理時には自身
の溶融により熱硬化した繊維強化樹脂層との間に遊隙を
形成して脱型を容易にする作用をする。(Function) In the above manufacturing method, the peripheral surface of the mandrel is coated with a material that has a melting point slightly higher than that of the fiber reinforced resin, so the predetermined shape is maintained during the heat curing treatment to guarantee the product shape. During the heating process after thermosetting, the material melts to form a gap between itself and the thermoset fiber reinforced resin layer, thereby facilitating demolding.

（実施例） 以下、本発明の実施例を添付図面も参照して説明する。(Example) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

第１図と第２図は、本発明にか覧るＦＲＰ管製造の中間
過程を示したものである。両図において、１はマンドレ
ルで、該マンドレルｌの周面には、第１図に示すように
、予めコーティングにより熱可塑性樹脂層（コーティン
グ層）２が形成されている。熱可塑性樹脂層２は、例え
ばポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）等か
ら成るもので、ＦＲＰの熱硬化温度よりわずか高目の融
点を有し、またその厚さは、通常２００ＩＬｍ程度とさ
れる。FIGS. 1 and 2 show an intermediate process of manufacturing an FRP pipe according to the present invention. In both figures, 1 is a mandrel, and as shown in FIG. 1, a thermoplastic resin layer (coating layer) 2 is previously formed on the circumferential surface of the mandrel 1 by coating. The thermoplastic resin layer 2 is made of polyethylene (PE), polypropylene (PP), etc., and has a melting point slightly higher than the thermosetting temperature of FRP, and its thickness is usually about 200 ILm. .

しかして上記熱可塑性樹脂層２のコーティングされたマ
ンドレル１には、第２図に示すように、繊維強化樹脂層
３が積層・形成される。この繊維強化樹脂層３は、炭素
繊維またはガラス繊維から成る糸（ヤーン）または紐（
ロービング）に熱硬化性のエポキシ樹脂を含浸させたも
のを、回転するマンドレル１に案内治具を用いて巻付け
ることにより形成される。なお、エポキシ樹脂の含浸量
は、通常繊維体積の１．４倍程度である。As shown in FIG. 2, a fiber-reinforced resin layer 3 is laminated and formed on the mandrel 1 coated with the thermoplastic resin layer 2. This fiber-reinforced resin layer 3 is made of carbon fiber or glass fiber yarn or string (
It is formed by winding a roving impregnated with a thermosetting epoxy resin around a rotating mandrel 1 using a guide jig. Note that the amount of epoxy resin impregnated is usually about 1.4 times the fiber volume.

上記のごとく一体化したマンドレルｌと繊維強化樹脂層
３とは、その後、熱硬化処理に供され、繊維強化樹脂層
３は硬化する。このとき熱可塑性樹脂層２は融点以下の
温度にあり、所定の形状を維持する。そして熱硬化処理
完了と同時に、前記熱硬化処理温度よりもわずか高温に
加熱する。すると熱可塑性樹脂層２は溶融し始め、遂に
はマンドレル１と熱硬化した繊維強化樹脂層との間に遊
隙が形成されるようになり、この状態のもと、前記硬化
樹脂層からマンドレルを抜取れば、所定形状のＦＲＰ管
が得られるようになる。The mandrel 1 and the fiber-reinforced resin layer 3 integrated as described above are then subjected to a thermosetting treatment, and the fiber-reinforced resin layer 3 is cured. At this time, the thermoplastic resin layer 2 is at a temperature below its melting point and maintains a predetermined shape. Simultaneously with the completion of the heat curing process, the material is heated to a temperature slightly higher than the temperature of the heat curing process. Then, the thermoplastic resin layer 2 begins to melt, and finally a gap is formed between the mandrel 1 and the thermoset fiber reinforced resin layer. Under this condition, the mandrel is removed from the cured resin layer. Once extracted, an FRP pipe with a predetermined shape can be obtained.

このように、何ら機械力を用いることなくきわめて容易
に脱型が可能となり、しかも熱可塑性樹脂を介すること
により得られるＦＲＰ管の内面精度が向上する。In this way, it is possible to demold the mold very easily without using any mechanical force, and the inner surface precision of the FRP pipe obtained by using the thermoplastic resin is improved.

なお、上記実施例において、マンドレルｌの周面に熱可
塑性樹脂層２を形成するようにしたが、これに代え、例
えばＦＲＰの熱硬化温度よりわずか高目の融点を有する
ワックスをコーティングするようにしても良い。In the above example, the thermoplastic resin layer 2 was formed on the circumferential surface of the mandrel l, but instead of this, for example, a wax having a melting point slightly higher than the thermosetting temperature of FRP may be coated. It's okay.

また上記実施例では円形管の製造について述べたが、こ
れに限定されず、角管等の異形管にも適用できることは
もちろんである。Furthermore, although the above embodiments have been described with respect to the manufacture of circular tubes, the present invention is not limited thereto and can of course be applied to irregularly shaped tubes such as square tubes.

（発明の効果） 以上、詳細に説明したように、本発明は繊維強化樹脂よ
りもわずか高目の融点を有する材料をコーティングした
マンドレルを用い、最終的に前記材料を加熱・溶融して
脱型するようにしたので、何ら機械力によらずにきわめ
て容易に脱型することができるようになり、この結果、
薄肉、細径、長尺、異形等積々の形状の繊維強化樹脂管
の製造が可能になると共に、キズや割れがなくかつ内面
精度にも優れた繊維強化樹脂管が得らるようになった。(Effects of the Invention) As explained above in detail, the present invention uses a mandrel coated with a material having a melting point slightly higher than that of fiber reinforced resin, and finally demolds the material by heating and melting it. As a result, the mold can be removed very easily without any mechanical force, and as a result,
It has become possible to manufacture fiber-reinforced resin pipes of various shapes such as thin walls, small diameters, long lengths, and irregular shapes, and it has also become possible to obtain fiber-reinforced resin pipes that are free from scratches and cracks and have excellent inner surface precision. Ta.

また従来行っていたマンドレルの抜取りを容易にする対
策が不要になって、繊維強化樹脂管の製作費が低減する
効果が得られ、さらには機械力を用いない脱型方式によ
り、製造の自由度が増す効果も得られるようになった。In addition, there is no need to take measures to make it easier to remove the mandrel, which was previously done, which has the effect of reducing manufacturing costs for fiber-reinforced resin pipes.Furthermore, the demolding method, which does not use mechanical force, allows for greater freedom in manufacturing. It is now possible to obtain the effect of increasing

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明にか振る繊維強化樹脂管製造の一過程を
示す斜視図、第２図は前回同様の他の過程を示す断面図
である。 １　・・・　マントｌ／ル ２　・・・　コーティング層（熱可塑性樹脂層またはワ
ックス層） ３　・・・　繊維強化樹脂層 特許出願人　　トヨタ自動車株式会社 同　　　　　豊田紡織株式会社 第１図 第２図FIG. 1 is a perspective view showing one process of manufacturing a fiber-reinforced resin pipe according to the present invention, and FIG. 2 is a sectional view showing another process similar to the previous time. 1... Mantle L/L 2... Coating layer (thermoplastic resin layer or wax layer) 3... Fiber reinforced resin layer Patent applicant Toyota Motor Corporation Toyota Boshoku Corporation Figure 1 Figure 2

Claims (2)

【特許請求の範囲】[Claims] （１）周面に繊維強化樹脂の熱硬化温度よりわずか高目
の融点を有する材料をコーティングして成るマンドレル
を用い、該マンドレルに繊維強化樹脂を積層・形成し、
続いて熱硬化処理を行い、しかる後に前記材料を加熱・
溶融して前記マンドレルと前記熱硬化した繊維強化樹脂
層との間に遊隙を形成することを特徴とする繊維強化樹
脂管の製造方法。(1) Using a mandrel whose peripheral surface is coated with a material having a melting point slightly higher than the thermosetting temperature of the fiber-reinforced resin, laminating and forming the fiber-reinforced resin on the mandrel,
This is followed by a heat curing treatment, after which the material is heated and
A method for producing a fiber-reinforced resin pipe, comprising: forming a gap between the mandrel and the thermoset fiber-reinforced resin layer by melting. （２）コーティング材料が熱可塑性樹脂またはワックス
であることを特徴とする特許請求の範囲第１項記載の繊
維強化樹脂管の製造方法。(2) The method for manufacturing a fiber-reinforced resin pipe according to claim 1, wherein the coating material is a thermoplastic resin or wax.
JP59123965A 1984-06-16 1984-06-16 Manufacture of fiber reinforced resin pipe Pending JPS612541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59123965A JPS612541A (en) 1984-06-16 1984-06-16 Manufacture of fiber reinforced resin pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59123965A JPS612541A (en) 1984-06-16 1984-06-16 Manufacture of fiber reinforced resin pipe

Publications (1)

Publication Number Publication Date
JPS612541A true JPS612541A (en) 1986-01-08

Family

ID=14873704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59123965A Pending JPS612541A (en) 1984-06-16 1984-06-16 Manufacture of fiber reinforced resin pipe

Country Status (1)

Country Link
JP (1) JPS612541A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816123A (en) * 1986-04-16 1989-03-28 The Perkin-Elmer Corporation Method of fabricating capillary electrophoresis separation channels
EP0326882A2 (en) * 1988-02-03 1989-08-09 Didier-Werke Ag Process and apparatus for making blocks from ceramic or fireproof material with channels extending therethrough
JPH04164609A (en) * 1990-10-30 1992-06-10 Mitsubishi Motors Corp Manufacture of hollow resin member

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816123A (en) * 1986-04-16 1989-03-28 The Perkin-Elmer Corporation Method of fabricating capillary electrophoresis separation channels
EP0326882A2 (en) * 1988-02-03 1989-08-09 Didier-Werke Ag Process and apparatus for making blocks from ceramic or fireproof material with channels extending therethrough
EP0326882A3 (en) * 1988-02-03 1991-01-30 Didier-Werke Ag Process and apparatus for making blocks from ceramic or fireproof material with channels extending therethrough
JPH04164609A (en) * 1990-10-30 1992-06-10 Mitsubishi Motors Corp Manufacture of hollow resin member

Similar Documents

Publication Publication Date Title
US2783174A (en) Process for producing fibrous tubes
JPS612541A (en) Manufacture of fiber reinforced resin pipe
JPH0374903B2 (en)
US3141052A (en) Method of forming seamless hollow plastic shapes
JPS63249631A (en) Manufacture of fiber reinforced synthetic resin molded article
JPS612540A (en) Manufacture of fiber reinforced resin pipe
JPH0688311B2 (en) Method for producing fiber-reinforced composite molded body
JPH0259328A (en) Manufacture of frp container
JPH0367638A (en) Preparation of frp pipe
JPS625055B2 (en)
JPH029621A (en) Manufacture of fishing rod
JP2004174929A (en) Cylindrical member and its manufacturing method
JPS6139184Y2 (en)
JP3014402B2 (en) Fiber reinforced plastic pipe and method for producing the same
JPH0134145B2 (en)
JPS6220901B2 (en)
TW244339B (en) Process of producing long-filament fiber reinforced thermoplastic racket frame
JPS63312810A (en) Preparation of frp reinforced concrete or mortar pipe
JPH02200945A (en) Fiber reinforcing resin alternate material for reinforcing bar and its manufacture
JPH0119337B2 (en)
JPH02271937A (en) Production of fiber-reinforced resin wiry body
JP2789568B2 (en) Manufacturing method of electrofusion joint
JPH0363504B2 (en)
JPS6161836A (en) Manufacture of fiber reinforced steering wheel
JPH0343929B2 (en)