JPS62207633A - Preparation of frp hollow rectangular material - Google Patents
Preparation of frp hollow rectangular materialInfo
- Publication number
- JPS62207633A JPS62207633A JP61051069A JP5106986A JPS62207633A JP S62207633 A JPS62207633 A JP S62207633A JP 61051069 A JP61051069 A JP 61051069A JP 5106986 A JP5106986 A JP 5106986A JP S62207633 A JPS62207633 A JP S62207633A
- Authority
- JP
- Japan
- Prior art keywords
- metal core
- frp
- divided
- core
- metal
- 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
- 239000000463 material Substances 0.000 title claims description 11
- 239000002184 metal Substances 0.000 claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 51
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012778 molding material Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 59
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 16
- 239000010931 gold Substances 0.000 description 15
- 229910052737 gold Inorganic materials 0.000 description 15
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- 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ＦＲＰ中空角材の製造法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing FRP hollow square members.
（従来の技術）
ＦｋＰ（繊維強化プラスチック）、臀に炭素ｍ、ｍを補
強材として用いたＣ Ｆ ＲＰ ！Ｘ軽量でしかも強度
、剛性にすぐれるため檀々の分野において構造材として
利用されている。その中でもパイプ状などの中空体は軽
謹、高剛性という長所を最大限に生かせることから特に
＠量化が請求される用途にＷＩＩＩが大きい。(Prior art) FkP (fiber reinforced plastic), C F RP using carbon m and m as reinforcing materials in the buttocks! Because it is lightweight and has excellent strength and rigidity, it is used as a structural material in various fields. Among them, hollow bodies such as pipe-shaped bodies can make the most of their advantages of lightness and high rigidity, so WIII is particularly suitable for applications where quantification is required.
このようなＦＲＰ中空体の製造方法としては一般にはＦ
Ｗ（フィラメント・ワインディング）法が採用されてい
る。こｔは金属製の芯＠（マンドレル）Ｋ熱硬化性樹脂
を含浸させ友極維を巻きつけて、そｒＬヲ加熱峡化恢、
中央のマンドレルを引き抜いて除去する方法である。こ
の力法においてマンドレルを成形品から容易に引き抜け
るようにするに昏エマンドレルにテーパーをつける方法
が一般的である。また、ＣＦＲＰにおいては加熱成形後
、冷却するとＣＦＭＰの繊維方向の熱膨張係数を工はと
んどゼロに近いため。Generally speaking, the manufacturing method for such FRP hollow bodies is FRP.
The W (filament winding) method is adopted. This is a metal core @ (mandrel) impregnated with K thermosetting resin and wrapped with Tomogyoku fiber, then heated and formed.
This method involves pulling out and removing the central mandrel. In this force method, it is common to taper the mandrel so that it can be easily pulled out of the molded product. In addition, when CFRP is cooled after hot forming, the coefficient of thermal expansion in the fiber direction of CFMP is almost zero.
マンドレルが収縮することによってマンドレルと成形品
の間に間＠を生じ、容易に脱型することができる。When the mandrel contracts, a gap is created between the mandrel and the molded product, allowing easy demolding.
（発明が解決しようとする問題点）
ところがＦＲＰ中空体において、その断面形状がＲ１横
比３以上の長方形状てあり、しかもＦＲＰ中空体の長手
方向にテーパーをつけることができないものでは、成形
に用いるマンドレルである金属製芯を引き抜いて除去す
ることが困雌である。また、たとえ引抜いて除去するこ
とができたとしても、引抜（のに非常に大きな荷重を必
要とし、その几めに成形品が破壊壊されたり、あるいは
金属製芯が変形したりする恐γしがある。(Problems to be Solved by the Invention) However, if the FRP hollow body has a rectangular cross-sectional shape with an R1 aspect ratio of 3 or more, and it is not possible to taper the FRP hollow body in the longitudinal direction, it is difficult to form it. It is difficult to pull out and remove the metal core that is the mandrel used. Furthermore, even if it could be removed by pulling it out, a very large load would be required to pull it out, and there is a risk that the molded product would be destroyed or the metal core would be deformed. There is.
こｊＬは金属製芯の断面における短辺は長辺に比べて短
いためにその方向でのＦＲＰと金＊ａ芯との熱）！！ｆ
３帳差による密着性の低下はわずかである。そのために
金属製芯を引抜（のに非常に大きな刀が必要となるので
ある。This jL is because the short side in the cross section of the metal core is shorter than the long side, so the heat between the FRP and the gold core in that direction)! ! f
There is only a slight decrease in adhesion due to the difference between the three sheets. For this purpose, a very large sword is required to pull out the metal core.
本発明はこの欠点を改良し、このようなＦＲＰ中空体の
製造において金ｋＡ製芯を容易に脱型することができる
方法を提供するものである。The present invention aims to improve this drawback and provide a method by which the gold kA core can be easily removed from the mold in the production of such FRP hollow bodies.
（問題点を解決するための手段）
すなわち１本発明は中空断面形状が縦横比６以上の長方
形状であるＦＲＰ中空角材の製造において、用いる金属
製芯をその短辺が短くなるように３枚以上の板に分割し
て使用することを特徴とするものである。(Means for Solving the Problems) That is, 1. In the manufacture of an FRP hollow square material whose hollow cross-sectional shape is rectangular with an aspect ratio of 6 or more, three metal cores are used so that the short sides thereof are short. It is characterized in that it can be used by dividing it into the above plates.
つまり１分割された板状の金ＰＡ＃芯を重ね合わせて、
その周囲にＦＷ法あるいはプリプレグを巻回するなどの
方法によりＦＲＰＹ形成して、加熱することで樹脂を硬
化させる。ｅＫ、ＫＭね合わせ定板状の金属製芯のうち
＋ ＦＲＰ成形品の断面の長辺部と接しない１両面が他
の金ＭＶ芯と接している金属芯を引き抜いて除去する。In other words, by overlapping the divided plate-shaped gold PA# cores,
FRPY is formed around it by the FW method or by winding prepreg, and the resin is cured by heating. eK, KM Assembled Among the metal cores in the form of a constant plate, pull out and remove the metal core whose one side that is not in contact with the long side of the cross section of the FRP molded product is in contact with the other gold MV core.
その後、その他の金属製芯を順次引き抜いて除去し、Ｆ
ＲＰ中空角材を得るのである。After that, the other metal cores are sequentially pulled out and removed, and the F
RP hollow square timbers are obtained.
本発明のように金Ｍａｉｌ芯を板状に分割し、その長辺
部がＦＲＰ成形体と接することなく、他の金属製芯と接
している金属製芯をＦＲＰ成形俊最初に引き抜いて除去
するのは、金属製芯のＦＲＰ成形体からの除去を容易に
するためである。As in the present invention, the gold mail core is divided into plate shapes, and the long sides of the metal cores are not in contact with the FRP molded body, but the metal cores that are in contact with other metal cores are pulled out and removed first by the FRP molding machine. This is to facilitate the removal of the metal core from the FRP molded body.
ＦＲＰ中空角材を製造するには金属製芯の周囲にＦＲＰ
を成形後、金属製芯な引き抜いて除去する方法が考えら
れるが、中空断面形状の縦横比が３以上の長方形状の場
合、その短辺の長さが長辺の長さにくらべて短い窺めに
短辺方向でのＦＲＰ成形後のＦＲＰと金属製芯との熱膨
張係数の差による長辺部におけるＦＲＰと金属製芯との
間の密着性の低下は望めない。こｒＬは熱膨張係数の小
さいＣＦＲＰにおいても同様である。そのために金属製
芯を引き抜いて除去するには非常に大きな力が必要であ
り、成形品の畏さが艮（なるとさらに大きな力か必要に
なる定めに成形品を破壊しｔす、金Ｍ４製芯を変形させ
たりする恐ｉＬがある。To manufacture FRP hollow square timbers, place FRP around the metal core.
One possible method is to remove the metal core after forming it, but if the hollow cross-sectional shape has a rectangular shape with an aspect ratio of 3 or more, the length of the short side is shorter than the length of the long side. Therefore, it cannot be expected that the adhesion between the FRP and the metal core in the long side portions will decrease due to the difference in thermal expansion coefficient between the FRP and the metal core after FRP molding in the short side direction. This rL is also the same for CFRP, which has a small coefficient of thermal expansion. For this reason, a very large force is required to pull out and remove the metal core, and if the molded product is damaged, an even greater force is required to destroy the molded product. There is a risk of deforming the core.
そこで本発明のように金属製芯を分゛刷して、その長辺
部がＦＲＰと接していない金Ｊ’Ｊｉ製芯を最初に引き
抜いて除去することが効果があるのである。このように
すると、最初に引き抜かｎる金属製芯は、七〇長辺部が
分割され友密看していない他の金属製芯と接しており、
さらにその短辺部はＦＲＰと接して１工いるが、その接
触面積は長辺部に比べて非常に小さいために、密着力は
小さく容易に引き抜くことができる。Therefore, as in the present invention, it is effective to print the metal core in parts and first pull out and remove the gold J'Ji core whose long side is not in contact with the FRP. In this way, the first metal core to be pulled out has its 70 long sides divided and is in contact with other metal cores that are not in close contact with each other.
Furthermore, although the short side part is in contact with the FRP, the contact area is very small compared to the long side part, so the adhesion force is small and it can be easily pulled out.
また、さらに引き抜きを容易にする罠は、最初に引き抜
く金属製芯と他の金ｊ１ｉ製芯との界面にオイル、グリ
ース等を塗り、滑りをよくすることが有効である。シー
分割した金属製芯同士の間にＦＲＰ成形時に樹脂が流入
して督着力を太き（することを防止するために、その部
分に離型フィルムを配置することにより、引き抜きをさ
らに容易にすることができる。Furthermore, to make the trap easier to pull out, it is effective to apply oil, grease, etc. to the interface between the metal core to be pulled out first and the other gold j1i core to improve slippage. In order to prevent resin from flowing between the sea-divided metal cores during FRP molding and increasing the adhesion force, a release film is placed in that area to make it easier to pull out. be able to.
また、成形品の長さか長く、引き抜き力をさらに小さく
する必要があるＩＭＪ付は、ＦＲＰ成形後、ｊ４初に抜
き抜いて除去する板状の金属製芯をその長手方向にａ１
°以上の傾斜角度で２つ以上の金形状に分割することが
効果的である。In addition, with IMJ, which requires a long molded product and the need to further reduce the pull-out force, after FRP molding, the plate-shaped metal core that is extracted and removed at the beginning of J4 should be removed in the longitudinal direction.
It is effective to divide the metal shape into two or more gold shapes with an inclination angle of 0° or more.
このようにすると、最初にこｔらを少し引き抜（と金ｆ
４１！ｌ！芯の短辺部とＦＲＰ間の密着力が太き（低下
するｔめに、さらに容易に引き抜くことが可能になるの
である。If you do this, you can pull out a little bit of these things (and money f) first.
41! l! As the adhesion between the short side of the core and the FRP increases (it decreases), it becomes possible to pull it out more easily.
なお１本発明において金属製芯を３つ以上に板状に分割
するのは、その長辺部がＦＲＰと撤しない金＃製芯を確
保する几めである。これら３つ以上の板状の金Ｊｔ４製
芯の肉厚、すなわち短辺の長さは任意である。また１本
発明において縦横比が３以上の中空断面と規定し次のは
、縦横比が３未満である場合は長辺の長さに比べて短辺
の長さはさほど小さくないために、長辺部でのＦＲＰと
金ｍ＃芯との閾の密着力の低下は縦横比が３以上のとき
に比べて大きい。し友がって、金慎製芯を分割しなくて
も小さな引き抜き力で金属製芯を除去することができる
のである。In the present invention, the reason why the metal core is divided into three or more plates is to ensure that the long sides of the core are made of gold and do not separate from the FRP. The thickness of these three or more plate-shaped gold Jt4 cores, that is, the length of the short side, is arbitrary. In addition, in the present invention, the aspect ratio is defined as a hollow cross section of 3 or more.If the aspect ratio is less than 3, the length of the short side is not so small compared to the length of the long side. The decrease in the threshold adhesion between the FRP and the gold m# core at the side portions is greater than when the aspect ratio is 3 or more. Therefore, the metal core can be removed with a small pulling force without having to split the metal core.
また１本発明において、さらに金Ｉｆ４製芯の引き抜き
を容易にするために、最初に引き抜いて除去する板状の
金ｐＡ製芯をその長手方向に０．１０以上の傾斜角度で
分割するのは、ＣＬ１°未満の傾斜角度で分割しても引
き抜き力の低下への効呆が７１％さい几めである。In addition, in the present invention, in order to further facilitate the pulling out of the gold If4 core, the plate-shaped gold pA core to be first pulled out and removed is divided in its longitudinal direction at an inclination angle of 0.10 or more. , CL Even if it is divided at an inclination angle of less than 1°, the effect on the reduction in the pull-out force is 71%.
なお、本発明に用いうるＦＲＰの樹脂としては、エポキ
シ樹脂、不飽和ポリエステル樹脂。In addition, examples of FRP resins that can be used in the present invention include epoxy resins and unsaturated polyester resins.
ビニルエステル樹脂、ポリイミド樹脂なト、＠強＃＃
ｆａとしては炭素微細が熱膨張係数が小さいことから好
ましいが、その他にガラス繊維、ケプラー繊維などを用
いることができる。Vinyl ester resin, polyimide resin, @strong##
Fine carbon is preferable as fa because it has a small coefficient of thermal expansion, but other materials such as glass fiber and Kepler fiber can also be used.
（作用］
以上、述べてき友ように本発明の方法にょｎは、その中
空断面形状が縦横比３以上の長方形状であるＦＲＰ中空
角材の金ｇ４製芯を用いに製造において、その金ｔ４＃
芯のＦＲＰ成形品からの引き抜きを容易に行うことがで
き、従来の方法では金属製芯の除去が困難であった形状
のＦＲＰ中空角材を容易に得ることができる。(Function) As mentioned above, the method of the present invention is to produce a gold T4# core of FRP hollow square material whose hollow cross-sectional shape is rectangular with an aspect ratio of 3 or more.
The core can be easily pulled out from the FRP molded product, and it is possible to easily obtain an FRP hollow square material having a shape in which it was difficult to remove the metal core using conventional methods.
以下、実施例を挙げて本発明の詳細な説明する。Hereinafter, the present invention will be explained in detail by giving examples.
（実施例）
（実施例１）
第１図に示す中空断面形状（内側寸法６１＋１１１Ｘ９
Ｑｍｎ＋、ｉ横比１５）で厚さ２１１１１１１、長さ１
ｍのＦＲＰ中空角材を成形するにあたり−＃！２１！ｉ
ｎ：示す厚さ２ｍｍ、幅９０ｍｍ、ｆｌｃさ１．２ｍの
ステンレス板を３枚重ね会わせて芯材とし、この芯材に
エポキシ樹脂含浸炭素繊維クロスプリグレグを巻きつけ
るように積層し友。これを成形用金すにセットして成形
温度１５０℃、成形圧カフｋｇ／−の条件で９０分間成
形し、脱型した。得らｒｔ友成形品から芯材を引き抜い
て除去す；ｂにあたり、まず、３枚重ね合わせたステン
レス製芯材の中央の１枚を引き抜いて除去した。この引
き抜き［５する引張り荷重は最大時で約４８０ｋｇであ
り、脱型機で容易に引き抜くことができた。さらに残っ
た２枚の芯材は中央の芯材を除去した友め、そこに空隙
ができたことに工り。(Example) (Example 1) Hollow cross-sectional shape shown in Fig. 1 (inner dimension 61 + 111 x 9
Qmn+, i side ratio 15), thickness 2111111, length 1
When molding FRP hollow square material of m-#! 21! i
n: Three stainless steel plates with a thickness of 2 mm, a width of 90 mm, and a flc of 1.2 m are stacked together to form a core material, and an epoxy resin-impregnated carbon fiber cross preg leg is laminated so as to be wrapped around this core material. This was set in a molding mold, molded for 90 minutes at a molding temperature of 150°C and a molding pressure of cuff kg/-, and then demolded. The core material was pulled out and removed from the obtained RT molded product; for step b, first, the center one of the three stacked stainless steel core materials was pulled out and removed. The tensile load for this pulling out [5] was about 480 kg at the maximum, and it could be easily pulled out using a demolding machine. Furthermore, the remaining two pieces of core material were made by removing the center core material, and the gap was created there.
より簡単に引き抜いて除去することができ友。You can more easily pull out and remove the friend.
（実施例２）
実施９ＩＪ１と同様の成形を行うにあたり、３枚に分割
する芯材のうち１重ね合わせるとき中央になる芯材を第
３図のこと（長手方向との傾斜角度が１°となるように
２つに分割したものを用い、他は実施例１と同様の条件
て底形を行った。(Example 2) When performing the same molding as in Example 9IJ1, the core material that will be the center when overlapping one of the core materials divided into three pieces is shown in Figure 3 (the inclination angle with the longitudinal direction is 1°). The bottom was shaped using the same conditions as in Example 1 except that the sample was divided into two parts.
得られ次成形品から中央の芯材を引き抜くのに贋した荷
重は約２００ｋｇであり、実施例１よりさらに容易に芯
材を除去することができた。The load required to pull out the central core material from the resulting next molded product was approximately 200 kg, and the core material could be removed more easily than in Example 1.
（比較例）
実姉例と同形状のＦＲＰ中空中空角底形するにあたり、
用いる金属内芯？分割せずに厚さ６唾１、幅９０ａｌ１
ｍのステンレス製芯材！そのまま使用し、他は実施例と
同様の条件で成形を行った。(Comparative example) In making the FRP hollow square bottom shape of the same shape as the actual sister example,
What metal inner core do you use? Thickness 6 1, width 90 al 1 without dividing
m stainless steel core material! The product was used as it was, and molding was performed under the same conditions as in the example.
得らｒ′Ｌ之成形品から芯材を引き抜こうとしたが。I tried to pull out the core material from the molded product.
大きな荷重の几め忙成形品の端部が破壊さｎ。The edge of a carefully molded product under heavy load is destroyed.
芯材を除去することは困難であり、衝撃的な力を加える
ことによりようやく除去することができた。しかし、成
形品はその端部が大きく破壊さｎ、芯材もｉ％的な力が
加わったことにより。The core material was difficult to remove and could only be removed by applying shocking force. However, the ends of the molded product were severely damaged, and the core material was also subjected to a force of i%.
ところどころに傷が発生し、そのままでは再び便用する
ことが不可能であった。There were scratches here and there, and it was impossible to use it again as it was.
（発明の効果ン
以上のように本発明の方法によれば、従来の方法では成
形後の金嬌製芯の除去に非常に大きな引ぎ抜き荷重を要
するために困難であったＦＲＰ中空角材の成形を容易に
することかできる。(Effects of the invention) As described above, according to the method of the present invention, it is possible to remove the FRP hollow square material, which was difficult to remove with the conventional method because it required a very large pulling load to remove the metal core after forming. It can be easily molded.
この方法により、織機用ベルトフレームの横部材などの
軽量でしかも高剛性を要求される用途に、それに適した
形状のＦＲＰ中空角材’Ｍｉｌｌ産注よく供給すること
が可能となるものである。By this method, it is possible to supply FRP hollow square material 'Mill' in a shape suitable for applications that require light weight and high rigidity, such as horizontal members of belt frames for looms.
＠１図は本発明の実施例１で成形したＦＲＰ中空角材の
斜視図、第２図は本発明の実施例１で使用した金ｒ＠製
芯の斜視図、第３図は不発明の実施例２で使用した中央
の金）ｆ４製芯の斜視図である。
符号の説明
Ｉ ＦＲＰ中空川材用 ２ 中空部
（−一 。@ Figure 1 is a perspective view of the FRP hollow square material formed in Example 1 of the present invention, Figure 2 is a perspective view of the gold r@ core used in Example 1 of the present invention, and Figure 3 is a perspective view of the non-inventive implementation. FIG. 2 is a perspective view of the center (gold) f4 core used in Example 2. Explanation of symbols I FRP hollow river timber 2 Hollow part (-1.
Claims (1)
製芯を除去する中空部断面の縦横比が３以上の長方形状
であるＦＲＰ中空角材の製造において、用いる金属製芯
をその短辺が短くなるように３枚以上の板状に分割し、 （ａ）分割された板状の金属製芯を重ね合わせてＦＲＰ
成形材料を巻回して成形する第１工 程、 （ｂ）ＦＲＰ成形品の内側長辺部に接することなく、両
面が他の金属製芯と接している金属 製芯を引き抜いて除去する第２工程、 （ｃ）第２工程で除去した金属製芯以外の金属製芯を順
次除去する第３工程、 からなるＦＲＰ中空角材の製造法。 ２、ＦＲＰ成形後、最初に引き抜いて除去する板状の金
属製芯はその長手方向に０．１°以上の傾斜角度で２つ
以上の台形状に分割したものである特許請求の範囲第１
項記載のＦＲＰ中空角材の製造法。[Scope of Claims] 1. Used in the production of FRP hollow square material having a rectangular shape with an aspect ratio of 3 or more in the cross section of the hollow part, in which the FRP molding material is wound around a metal core and the metal core is removed after molding. Divide the metal core into three or more plates so that the short sides become shorter, and (a) Overlap the divided plate-shaped metal cores to create FRP.
The first step is to wind and mold the molding material, (b) the second step is to pull out and remove the metal core whose both sides are in contact with other metal cores without contacting the inner long side of the FRP molded product. (c) A third step of sequentially removing metal cores other than the metal core removed in the second step. 2. After FRP molding, the plate-shaped metal core that is first pulled out and removed is divided into two or more trapezoids at an inclination angle of 0.1° or more in the longitudinal direction.Claim 1
2. Method for manufacturing FRP hollow square timbers as described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051069A JPS62207633A (en) | 1986-03-07 | 1986-03-07 | Preparation of frp hollow rectangular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051069A JPS62207633A (en) | 1986-03-07 | 1986-03-07 | Preparation of frp hollow rectangular material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62207633A true JPS62207633A (en) | 1987-09-12 |
Family
ID=12876513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61051069A Pending JPS62207633A (en) | 1986-03-07 | 1986-03-07 | Preparation of frp hollow rectangular material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62207633A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6890470B2 (en) * | 2002-03-09 | 2005-05-10 | Airbus Deutschland Gmbh | Method for producing a fiber composite structural component |
| US7175795B2 (en) | 2002-03-08 | 2007-02-13 | Airbus Deutschland Gmbh | Method for manufacturing a fiber reinforced synthetic composite structural element using fiber textile preforms |
| JP2011011474A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding lengthy molding |
| WO2015033625A1 (en) * | 2013-09-05 | 2015-03-12 | 三菱重工業株式会社 | Core box and method for producing hollow structure |
| CN111112408A (en) * | 2020-01-17 | 2020-05-08 | 深圳市创益通技术股份有限公司 | Method for forming bent pipe by using flexible elastic sheet |
-
1986
- 1986-03-07 JP JP61051069A patent/JPS62207633A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7175795B2 (en) | 2002-03-08 | 2007-02-13 | Airbus Deutschland Gmbh | Method for manufacturing a fiber reinforced synthetic composite structural element using fiber textile preforms |
| US6890470B2 (en) * | 2002-03-09 | 2005-05-10 | Airbus Deutschland Gmbh | Method for producing a fiber composite structural component |
| JP2011011474A (en) * | 2009-07-02 | 2011-01-20 | Honda Motor Co Ltd | Method for molding lengthy molding |
| WO2015033625A1 (en) * | 2013-09-05 | 2015-03-12 | 三菱重工業株式会社 | Core box and method for producing hollow structure |
| JP2015051538A (en) * | 2013-09-05 | 2015-03-19 | 三菱重工業株式会社 | Core mold, and method for producing hollow structure |
| US10322529B2 (en) | 2013-09-05 | 2019-06-18 | Mitsubishi Heavy Industries, Ltd. | Assembled mandrel and method for producing hollow structure |
| CN111112408A (en) * | 2020-01-17 | 2020-05-08 | 深圳市创益通技术股份有限公司 | Method for forming bent pipe by using flexible elastic sheet |
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