JPS61263714A - Curing of resin-impregnated product - Google Patents
Curing of resin-impregnated productInfo
- Publication number
- JPS61263714A JPS61263714A JP10600285A JP10600285A JPS61263714A JP S61263714 A JPS61263714 A JP S61263714A JP 10600285 A JP10600285 A JP 10600285A JP 10600285 A JP10600285 A JP 10600285A JP S61263714 A JPS61263714 A JP S61263714A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- curing
- temperature
- mold
- cured
- 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
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、ガラス繊維強化合成樹脂製の絶縁筒、絶縁板
等を製作する【二際して採用される樹脂含浸物硬化方法
に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for curing a resin impregnated material, which is employed for producing insulating cylinders, insulating plates, etc. made of glass fiber reinforced synthetic resin. .
繊維強化プラスチック(以下FRPと記す)は、重量あ
たりの機械的強度の大きい構造電気絶縁物として高電圧
の分野で使用されている。Fiber-reinforced plastics (hereinafter referred to as FRP) are used in the field of high voltage as structural electrical insulators with high mechanical strength per weight.
機器の軽量化、小型化の要求は省エネルギー、省資源に
寄与するものとして適用範囲はますます大きくなってい
る。The scope of application of the demand for lighter weight and smaller equipment is expanding as it contributes to energy and resource conservation.
このため電気絶縁物であるFRPの電気的、機械的両特
性の向上が強く望まれている。Therefore, it is strongly desired to improve both the electrical and mechanical properties of FRP, which is an electrical insulator.
FRPの製造方法として、ハンドレイアップ法、フィラ
メントワイディング法、プレス法、真空含浸法その他色
々な成形方法が開発されている。Various molding methods have been developed as methods for manufacturing FRP, including a hand lay-up method, a filament winding method, a press method, a vacuum impregnation method, and others.
大気中で成形処理するものは、空気を絶縁層内にとり込
んでしまい加熱硬化後も気泡としてFRP内に残存する
。周知のように固体絶縁物内の気泡は放電し易いので、
これ等の方法で製作したF1’LPは設計電界を低めに
しなければならない欠点がある。When molding is performed in the atmosphere, air is taken into the insulating layer and remains as bubbles in the FRP even after heating and curing. As is well known, air bubbles in solid insulators are prone to discharge, so
F1'LP manufactured by these methods has the disadvantage that the designed electric field must be kept low.
従って電気的に見た場合、真空中で成形処理する真空含
浸法が最も望ましいと言える。Therefore, from an electrical point of view, it can be said that the vacuum impregnation method, which involves molding in a vacuum, is the most desirable.
FRPの機械的特性は、強化材である繊維の種類、太さ
、織り方、繊維材料の配向、処理樹脂の種類、含浸の程
度により大きく異なる。The mechanical properties of FRP vary greatly depending on the type, thickness, weaving method, orientation of the fiber material, type of treated resin, and degree of impregnation of the reinforcing fibers.
要求される機械的強度に見合った材料構成を湯沢するこ
と(=なるが、前述の真空含浸法を採用した場合、樹脂
の硬化収縮による残留歪のため、層内に硬化後または使
用中に亀裂が発生しやすいという欠点があった。However, if the vacuum impregnation method described above is adopted, cracks may occur in the layer after curing or during use due to residual strain caused by curing shrinkage of the resin. The disadvantage was that it was easy for this to occur.
以下従来の絶縁筒の製作について第5図を用いて説明す
る。The production of a conventional insulating tube will be explained below with reference to FIG.
第5図は、樹脂を含浸していない繊維材料1をマンドレ
ル2に巻きつけた後、型3内に入れ、全体を真空含浸タ
ンク(以下タンクと称す)4に入れ、タンク4外から樹
脂だめ5を通じ樹脂6を注入するいわゆる真空含浸法に
よる製法の断面図を示す。Fig. 5 shows that after a fiber material 1 which is not impregnated with resin is wound around a mandrel 2, it is put into a mold 3, the whole is put into a vacuum impregnation tank (hereinafter referred to as tank) 4, and the resin is poured from outside of the tank 4. 5 is a cross-sectional view of a manufacturing method using a so-called vacuum impregnation method in which resin 6 is injected through 5.
この方法では、一般に多量の樹脂を使用し、含浸時間を
長くとれるように、可使時間の長い加熱硬化型の樹脂を
用いる。大形の絶縁筒はど含浸時間が長くなるので可使
時間の長い樹脂を用いる必要がある。In this method, a large amount of resin is generally used, and a heat-curable resin with a long pot life is used so that the impregnation time can be extended. Since the impregnation time for a large insulating cylinder is long, it is necessary to use a resin with a long pot life.
樹脂を含浸した後、含浸樹脂6を硬化させるため、タン
ク4内でタンクに備え付けられた熱源または別途準備し
た乾燥設備内で所定の加熱処理により、含浸樹脂6の硬
化を行う。After impregnating with the resin, in order to harden the impregnated resin 6, the impregnated resin 6 is cured by a predetermined heat treatment in the tank 4 using a heat source installed in the tank or in separately prepared drying equipment.
含浸樹脂6の硬化収縮量を低く抑えるため、まず低い温
度での硬化を実施後1.次いで高い温度で後硬化を行い
、急激な硬化反応を防いでいる。In order to suppress the amount of curing shrinkage of the impregnated resin 6, it is first cured at a low temperature, and then 1. Post-curing is then performed at high temperatures to prevent rapid curing reactions.
しかし、温度分布の良いといわれる熱風循環式の乾燥設
備を使用したとしても、含浸物の上下で上部の温度が高
く、下部が低いという温度分布は、避けられない。また
、第5図の含浸物の場合、マンドレル2の内部人では、
熱媒体が十分循環しないため、外周部8より温度が低い
という問題がある。−
含浸樹脂の硬化は温度の高い個所から開始するので、上
部、外周部、中央部、マンドレル周辺と順次硬化してい
くことになる。この場合上部の樹脂がまず硬化するので
、この層1一種のふたθ成し、このふたとマンドレル2
および型3に囲まれた容積が決まってしまう。その後、
容積の大部分を占めるこの囲まれた部′分の樹脂が硬化
していくが、液体から固体への相変化に伴う硬化収縮を
起こし、大部分の硬化収縮歪が離型処理した型3との間
のはく離という現象で緩和されるものの一部FRP本体
に残留応力という形で残ったり、変形したりする。また
、マンドレル2の周辺が最も硬化が遅いため残留応力と
も最大となる。この残留応力や変形が冷却中もしくは加
工中、使用中、時として亀裂という現象で緩和される。However, even if hot air circulation drying equipment is used, which is said to have a good temperature distribution, the temperature distribution between the top and bottom of the impregnated material is high in the upper part and low in the lower part. In addition, in the case of the impregnated material shown in Fig. 5, in the case of the mandrel 2,
Since the heat medium does not circulate sufficiently, there is a problem that the temperature is lower than that of the outer peripheral part 8. - Since the curing of the impregnated resin starts from the high-temperature area, it will harden sequentially from the top, outer periphery, center, and around the mandrel. In this case, since the upper resin hardens first, this layer 1 forms a kind of lid θ, and this lid and mandrel 2
And the volume surrounded by mold 3 is determined. after that,
The resin in this enclosed area, which occupies most of the volume, hardens, but curing shrinkage occurs due to the phase change from liquid to solid, and most of the curing shrinkage strain is caused by mold 3 which has been released. Although the stress is alleviated by the phenomenon of delamination, some of the stress remains in the FRP body in the form of residual stress or deforms. Further, since the area around the mandrel 2 hardens the slowest, the residual stress is also the largest. This residual stress and deformation is alleviated during cooling, processing, and use, sometimes through the phenomenon of cracking.
本発明は以上の問題に鑑みなされたもので樹脂の硬化収
縮1;起因する残留歪を極力抑えることが可能な、樹脂
含浸物の硬化方法を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for curing a resin-impregnated material that can minimize residual strain caused by curing shrinkage of the resin.
本発明の方法::おいては繊維材料等を型に入れて樹脂
を含浸させた樹脂含浸物の硬化において。The method of the present invention: In the curing of a resin-impregnated product in which a fiber material or the like is placed in a mold and impregnated with a resin.
ヒータ等シ只に矛め取付けでおいでJの下部の温度を上
部より高くし、硬化反応を型の下部に位置する樹脂より
開始させる。A heater or the like is installed to raise the temperature of the lower part of the mold higher than that of the upper part, so that the curing reaction starts from the resin located at the lower part of the mold.
硬化時硬化収縮を発生するが、収縮した部分に上部の未
硬化の樹脂が重力又は、外部より加圧することにより、
流れ込む。Curing shrinkage occurs during curing, but due to gravity or external pressure applied to the uncured resin on the top of the contracted area,
Flow into.
順次上部也:硬化が進行し、含浸物内の硬化収縮を低(
抑えることができ、収縮(:起因する残留応力の緩和が
図られ、電気・機門的に信頼性の高い硬化物を得ること
ができる。Sequential upper layer: Curing progresses, reducing curing shrinkage within the impregnated material (
Residual stress caused by shrinkage can be alleviated, and a cured product with high electrical and mechanical reliability can be obtained.
次に本発明の一実施例を図面を引用しながら説明する。 Next, one embodiment of the present invention will be described with reference to the drawings.
第1図は樹脂を含浸していない繊維材料1をマンドレル
2に1巻キつけた後型3&:入れ、全体をタンク4に入
れ、タンク4外から樹脂だめ5を通じ、樹脂6を注入す
るいわゆる絶縁筒の真空含浸法による製作を示している
。Fig. 1 shows a process in which a fiber material 1 that is not impregnated with resin is wrapped around a mandrel 2 and then put into a mold 3 &:, the whole is put into a tank 4, and a resin 6 is injected from outside the tank 4 through a resin reservoir 5. This shows the production of an insulating tube using the vacuum impregnation method.
次いで、タンク4内もしくは、別途用意した乾燥設備内
に入れ、加熱を行う。この段階での上部の温度は目的の
硬化温度より5〜20℃低く設定する。Next, it is placed in the tank 4 or in a separately prepared drying facility and heated. The upper temperature at this stage is set 5 to 20°C lower than the target curing temperature.
次いでマンドレル内周側に取付けた上下方向に分割した
ヒータ7のうちの下部に位置するものに通電し、上部の
温度より5〜20℃高い温度でコントロールする。硬化
が終了した時点で順次上方に位置するヒータ7に通電を
行い、下部に含浸の樹脂から順次上部の樹脂の硬化を行
い、全体が硬化した後、従来方法による後硬化を実施す
る。Next, among the vertically divided heaters 7 attached to the inner circumferential side of the mandrel, the lower part is energized, and the temperature is controlled to be 5 to 20° C. higher than the upper part. When curing is completed, the heaters 7 located above are sequentially energized to cure the impregnated resin in the lower part and then the resin in the upper part, and after the entire resin is cured, post-curing is performed by a conventional method.
まずヒータ7の下部より通電し、下部の樹脂の温度をこ
れより上部の樹脂より高くしたため、下部の樹脂が早く
硬化を始める。First, electricity is applied from the lower part of the heater 7 to make the temperature of the resin in the lower part higher than that of the resin in the upper part, so that the resin in the lower part begins to harden more quickly.
この時::硬化収縮が既に始まっているが、上部に未硬
化の樹脂があるため収縮した部分に樹脂が流れ込み実質
上硬化収縮のないことになる。順次上部に硬化が進行す
るので、含浸物内の硬化収縮を非富に低く抑えることが
できる。At this time, curing shrinkage has already begun, but since there is uncured resin at the top, the resin flows into the contracted area, resulting in virtually no curing shrinkage. Since curing proceeds sequentially from the top, curing shrinkage within the impregnated material can be kept extremely low.
本発明では、上部より硬化収縮分の樹脂を補給できるた
め、硬化収縮による歪の大部分を解除でき、硬化収縮は
最終的に樹脂6の上部の液面レベル低下という現象で現
われるが、この部分は通常加工代となるので問題ない。In the present invention, since the resin corresponding to curing shrinkage can be replenished from the upper part, most of the distortion caused by curing shrinkage can be canceled. There is no problem as this is normally a processing fee.
また、ヒータ7の位置として、第1図で示した他に型3
の外周面も考えることができるが、製品内の残留応力を
考えた場合、ここで示したマンドレル2の内側が最適で
ある。In addition to the position of the heater 7 shown in FIG.
Although the outer peripheral surface of the mandrel 2 can be considered, when considering the residual stress within the product, the inside of the mandrel 2 shown here is optimal.
また繊維材の内部に含浸された樹脂の移動は困難なので
、含浸的全体を5〜7)#/−以上の加圧条件下で硬化
させると、樹脂の補給が容易となり繊維材内部の歪も解
除される。In addition, since it is difficult to move the resin impregnated inside the fiber material, if the entire impregnated material is cured under pressure conditions of 5 to 7) #/- or more, it will be easier to replenish the resin and reduce distortion inside the fiber material. It will be canceled.
他の実施例として、第2図に示すように、蒸気配管8を
取付けてもよく、この場合は、スチーム入口を下部とし
、上部を出口とすれば、元圧のコン)ty−ルだけで温
度勾配が自然につき操作が容易である。As another example, as shown in FIG. 2, a steam pipe 8 may be installed. In this case, if the steam inlet is at the bottom and the outlet is at the top, only the source pressure condenser is used. Easy to operate as there is a natural temperature gradient.
ま、た第3図に示すように、更に温度管理が容易なよう
に、ヒータ線もしくは蒸気配管の下部の配置を密に上部
になるにつれて疎にしてもよい。尚ここでは絶縁筒につ
いて説明を行ったが、円筒状のものに限らず適宜変形す
ればよい。Furthermore, as shown in FIG. 3, in order to further facilitate temperature control, the heater wires or steam pipes may be arranged densely at the bottom and sparsely arranged toward the top. Although the insulating tube has been described here, it is not limited to a cylindrical shape, and may be modified as appropriate.
第4図に積層板の場合の実施例を示す。FIG. 4 shows an example in the case of a laminated plate.
以上説明したように、本殉明によれば加熱硬化時樹脂含
浸物の型容器に熱源を持たせ、下部の温度を高く上部の
温度を低くするような温度勾配を付けるので、樹脂の硬
化は樹脂含浸物の下部より上部に向って進行し、硬化収
縮は流動性を有している液状部分で吸収され、樹脂含浸
物の硬化物内の便化収縮による残留応力が緩和され、電
気・機械的に信頓性の高い硬化物を得ることができる。As explained above, according to this method, a heat source is provided in the mold container of the resin-impregnated material during heat curing, and a temperature gradient is created such that the temperature at the bottom is high and the temperature at the top is low, so that the resin does not harden. The resin-impregnated material progresses from the bottom to the top, and the curing shrinkage is absorbed by the liquid part that has fluidity, and the residual stress due to faecal shrinkage in the cured resin-impregnated material is alleviated, and electrical/mechanical A highly reliable cured product can be obtained.
第1図は本発明の一実施例の硬化方法の適用状況を示す
断面図、第2図、第3図および第4図は本発明の他の実
施例の適用状況を示す断面図、第5図は従来の硬化方法
を示す図である。
1・・・繊維材料、 2・・・マンドレル、3・
・・型、 4・−含浸タンク、5・−樹脂
だめ、 6・・・樹脂、7・・・ヒータ、
8・・・蒸気配管。
&m人*m+ Fill :斤 ’Jli
汝rl”FA、1&)第1図
第2WJ
第3WJ
第4[
第5図FIG. 1 is a cross-sectional view showing how the curing method of one embodiment of the present invention is applied; FIGS. 2, 3, and 4 are cross-sectional views showing how other embodiments of the present invention are applied; FIG. The figure shows a conventional curing method. 1... Fiber material, 2... Mandrel, 3...
...Mold, 4.-Impregnation tank, 5.-Resin reservoir, 6.-Resin, 7.-Heater,
8...Steam piping. &m person*m+ Fill: 斤 'Jli
Thou rl” FA, 1 &) Fig. 1 Fig. 2 WJ 3rd WJ Fig. 4 [ Fig. 5
Claims (1)
を含浸した後、加熱硬化する方法において、前記容器ま
たは型に加熱装置を取付け、含浸物の下部の温度を上部
の温度より高くし前記樹脂を下部から順次上部へむけて
硬化させることを特徴とする樹脂含浸物硬化方法。 2、加熱硬化を大気圧以上の加圧下で実施することを特
徴とする特許請求の範囲第1項記載の樹脂含浸物硬化方
法。 3、加熱装置を容器または型の下部に密に上部に疎に配
置したことを特徴とする特許請求の範囲第1項記載の樹
脂含浸物硬化方法。[Claims] 1. In a method of impregnating a fiber material or the like with a thermosetting resin using a container or mold and then curing it by heating, a heating device is attached to the container or mold to adjust the temperature of the lower part of the impregnated material. A method for curing a resin-impregnated material, characterized in that the resin is cured sequentially from the lower part to the upper part by raising the temperature of the resin to a higher temperature than that of the upper part. 2. The method for curing a resin-impregnated material according to claim 1, wherein the heat curing is carried out under pressure equal to or higher than atmospheric pressure. 3. The method for curing a resin-impregnated material according to claim 1, characterized in that the heating devices are arranged densely in the lower part of the container or mold and sparsely arranged in the upper part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10600285A JPS61263714A (en) | 1985-05-20 | 1985-05-20 | Curing of resin-impregnated product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10600285A JPS61263714A (en) | 1985-05-20 | 1985-05-20 | Curing of resin-impregnated product |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61263714A true JPS61263714A (en) | 1986-11-21 |
Family
ID=14422482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10600285A Pending JPS61263714A (en) | 1985-05-20 | 1985-05-20 | Curing of resin-impregnated product |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61263714A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0368098A2 (en) * | 1988-10-31 | 1990-05-16 | Mitsubishi Denki Kabushiki Kaisha | A porous structural unit and a method of preparing the same |
JPH0336914A (en) * | 1989-06-29 | 1991-02-18 | Toshiba Corp | Manufacture of insulation spacer |
FR2740382A1 (en) * | 1995-10-25 | 1997-04-30 | Snecma | MOLDING PROCESS FOR HIGH STRENGTH ELONGATED PARTS IN FIBER-RESIN COMPOSITE |
KR100629959B1 (en) | 2005-06-01 | 2006-09-28 | 오재옥 | Equipment for filament-winding forming and method for filament-winding forming thereof |
-
1985
- 1985-05-20 JP JP10600285A patent/JPS61263714A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0368098A2 (en) * | 1988-10-31 | 1990-05-16 | Mitsubishi Denki Kabushiki Kaisha | A porous structural unit and a method of preparing the same |
US5108833A (en) * | 1988-10-31 | 1992-04-28 | Mitsubishi Denki Kabushiki Kaisha | Porous structural unit and a method of preparing the same |
US5143664A (en) * | 1988-10-31 | 1992-09-01 | Mitsubishi Denki Kabushiki Kaisha | Method of preparing a porous structural unit |
JPH0336914A (en) * | 1989-06-29 | 1991-02-18 | Toshiba Corp | Manufacture of insulation spacer |
FR2740382A1 (en) * | 1995-10-25 | 1997-04-30 | Snecma | MOLDING PROCESS FOR HIGH STRENGTH ELONGATED PARTS IN FIBER-RESIN COMPOSITE |
EP0770463A1 (en) * | 1995-10-25 | 1997-05-02 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Process for manufacturing fiber-reinforced, high-strength elongated articles |
KR100629959B1 (en) | 2005-06-01 | 2006-09-28 | 오재옥 | Equipment for filament-winding forming and method for filament-winding forming thereof |
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