JPH06206548A - Automobile steering wheel and manufacture thereof - Google Patents
Automobile steering wheel and manufacture thereofInfo
- Publication number
- JPH06206548A JPH06206548A JP5004261A JP426193A JPH06206548A JP H06206548 A JPH06206548 A JP H06206548A JP 5004261 A JP5004261 A JP 5004261A JP 426193 A JP426193 A JP 426193A JP H06206548 A JPH06206548 A JP H06206548A
- Authority
- JP
- Japan
- Prior art keywords
- steering wheel
- fiber
- resin
- prepreg
- automobile
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 65
- 239000011347 resin Substances 0.000 claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 42
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 238000002844 melting Methods 0.000 claims abstract description 25
- 230000008018 melting Effects 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 239000012783 reinforcing fiber Substances 0.000 claims description 14
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 229920005749 polyurethane resin Polymers 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 239000009719 polyimide resin Substances 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 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 claims 1
- 229920000058 polyacrylate Polymers 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 26
- 239000011162 core material Substances 0.000 description 22
- 239000010410 layer Substances 0.000 description 10
- 239000006260 foam Substances 0.000 description 6
- 239000000805 composite resin Substances 0.000 description 5
- 239000013585 weight reducing agent Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000002759 woven fabric Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001245 Sb alloy Inorganic materials 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
Landscapes
- Steering Controls (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軽量で耐衝撃特性に優
れた繊維強化熱硬化性樹脂プリプレグにて一体中空成形
された自動車用ステアリングホイール及びその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering wheel for an automobile integrally hollow-molded with a fiber-reinforced thermosetting resin prepreg which is lightweight and has excellent impact resistance, and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】近年、自動車用部品の軽量化は、燃費の
向上につながる重要な課題であり、自動車用ステアリン
グホイールについても軽量化が検討されている。従来、
自動車用ステアリングホイールは、芯金として炭素鋼や
アルミニウム合金を使用し、その表層にウレタン等の発
泡フォーム材を配設し、最外層を合成樹脂で構成してい
た。しかし、このようにして構成されるステアリングホ
イールは、重量が重いという問題点がある。2. Description of the Related Art In recent years, weight reduction of automobile parts has been an important issue that leads to improvement of fuel efficiency, and weight reduction of automobile steering wheels has also been studied. Conventionally,
In a steering wheel for an automobile, carbon steel or aluminum alloy is used as a core metal, a foamed foam material such as urethane is disposed on the surface layer, and the outermost layer is made of synthetic resin. However, the steering wheel configured as described above has a problem that the weight is heavy.
【０００３】また、ステアリングホイール内にエアーバ
ックシステム等を搭載する場合において、ステアリング
ホイール部にかかる重量は増加し、そのためにステアリ
ングシャフトが振れる問題がある。これらの問題の解決
のためにステアリングホイール自体の軽量化は必要不可
欠の条件となる。従来、ステアリングホイールの軽量化
を進めるにあたり、芯金に軽量合金材料であるマグネシ
ウム合金を使用してステアリングホイールを製造する方
法（特開昭５９−１６０６６６号公報）、芯金をより薄
くして炭素繊維等の強化繊維にて補強してステアリング
ホイールを製造する方法（特開昭６０−１８９４２６号
公報）、芯金を発泡フォーム等のプラスチックあるいは
ゴム等の軽量保形材からなる芯材としてその周囲に炭素
繊維等の強化繊維を配設してステアリングホイールとす
る方法（特開昭５９−１２０５６８号公報）、及び芯金
に炭素鋼又はアルミニウム合金製の中空パイプを使用し
てステアリングホイールを製造する方法（特開昭６０−
７８８６５号公報）等が知られている。Further, when an air bag system or the like is mounted in the steering wheel, the weight applied to the steering wheel portion increases, which causes a problem of swinging of the steering shaft. In order to solve these problems, weight reduction of the steering wheel itself is an essential condition. Conventionally, in advancing the weight reduction of a steering wheel, a method of manufacturing a steering wheel by using a magnesium alloy which is a lightweight alloy material for a cored bar (JP-A-59-160666), a thinner cored bar and carbon. A method of manufacturing a steering wheel by reinforcing with reinforcing fibers such as fibers (Japanese Patent Laid-Open No. 60-189426), and a core metal as a core material made of a lightweight shape retention material such as plastic such as foamed foam or rubber. A steering wheel is manufactured by arranging reinforcing fibers such as carbon fibers in a steering wheel (Japanese Patent Laid-Open No. 59-120568), and a steering wheel is manufactured by using a hollow pipe made of carbon steel or aluminum alloy as a core metal. Method (JP-A-60-
No. 78865) is known.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
自動車用ステアリングホイールでは、芯金の一部を金属
で製作するか又は全部を金属で製作している場合には、
どうしても、軽量化が不十分であり、また補強部に使用
している強化繊維も十分に補強効果及び軽量効果が発揮
されていないという問題があった。また、芯金を発泡フ
ォーム等のプラスチックあるいはゴム等の軽量保形材か
らなる芯材として、その周囲に炭素繊維等の強化繊維を
配設してステアリングホイールとする方法（特開昭５９
−１２０５６８号公報）では、リム部とスポーク部とを
別々に形成し、結合部材を介して一体にしており、その
製造方法が煩雑であった。However, in the conventional steering wheel for automobiles, when a part of the cored bar is made of metal or the cored bar is made entirely of metal,
Inevitably, there is a problem in that the weight reduction is insufficient, and the reinforcing fiber used in the reinforcing portion does not sufficiently exert the reinforcing effect and the lightweight effect. Further, a method of using a core metal as a core material made of a lightweight shape-retaining material such as plastic such as foamed foam or rubber, and reinforced fibers such as carbon fibers around the core metal to form a steering wheel (Japanese Patent Laid-Open No. 59-59).
In JP-A-120568), the rim portion and the spoke portion are separately formed and integrated with each other through the joining member, and the manufacturing method thereof is complicated.
【０００５】そこで本発明は、軽量で且つ負荷にも十分
耐える強度を持ち、しかも製造が容易で、リム部、スポ
ーク部及びボスプレート部を一体成形したステアリング
ホイール及びその製造方法を提供することを目的とす
る。さらに本発明の目的は、ボス金具も一体成形したス
テアリングホイール及びその製造方法を提供することを
目的とする。Accordingly, the present invention provides a steering wheel which is lightweight and has sufficient strength to withstand a load, is easy to manufacture, and integrally forms a rim portion, a spoke portion, and a boss plate portion, and a manufacturing method thereof. To aim. A further object of the present invention is to provide a steering wheel integrally formed with a boss fitting and a method for manufacturing the steering wheel.
【０００６】[0006]
【課題を解決するための手段】前記した問題点を解決す
るために、本発明は、繊維強化熱硬化性樹脂プリプレグ
にて、リム部、スポーク部及びボスプレート部からなる
ステアリングホイールが一体中空成形されていることを
特徴とする自動車用ステアリングホイールとするもので
ある。In order to solve the above-mentioned problems, the present invention is a fiber reinforced thermosetting resin prepreg in which a steering wheel composed of a rim portion, a spoke portion and a boss plate portion is integrally hollow molded. The steering wheel for an automobile is characterized by being
【０００７】また、本発明は、リム部、スポーク部及び
ボスプレート部からなるステアリングホイールの中空部
となるべき部分の形状と同じ形状の芯金を低融点合金に
て製造し、製造された芯金の外周部に、繊維強化熱硬化
性樹脂プリプレグを積層するとともに該積層間及び／又
は芯金の表面に発泡性樹脂基材を積層してそれぞれ１層
又は複数層からなる積層体とし、得られた積層体を金型
にて加熱加圧成形して硬化と同時に発泡を行ない、芯金
を加熱溶融し、成形体から低融点合金を排出して成形体
を中空形状とすることを特徴とする自動車用ステアリン
グホイールの製造方法とするものである。Further, according to the present invention, a cored bar made of a low melting point alloy is manufactured by manufacturing a cored bar made of a low melting point alloy, the cored bar having the same shape as the part of the steering wheel, which is composed of the rim part, the spoke part and the boss plate part, to be a hollow part. A fiber-reinforced thermosetting resin prepreg is laminated on the outer peripheral portion of the gold, and a foamable resin base material is laminated between the laminations and / or on the surface of the core metal to obtain a laminate composed of one layer or a plurality of layers, respectively. The laminated body thus obtained is heated and pressure-molded in a mold to be foamed simultaneously with curing, and the cored bar is heated and melted to discharge the low melting point alloy from the molded body to form the molded body into a hollow shape. And a method for manufacturing a steering wheel for an automobile.
【０００８】本発明の自動車用ステアリングホイールを
図面によって説明する。図１は、繊維強化熱硬化性樹脂
プリプレグを用いて製造された本発明の自動車用ステア
リングホイールの一例を示す平面図である。図１におい
て、１０はステアリングホイール本体、１１はリム部、
１２はスポーク部、１３はボスプレート部、１４はボス
金具である。この自動車用ステアリングホイールは、リ
ム部１１、スポーク部１２及びボスプレート部１３が繊
維強化熱硬化性樹脂プリプレグにて一体中空成形されて
いて、ボスプレート部１３に、ボス金具１４が成形時に
一体成形されている。A vehicle steering wheel of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of an automobile steering wheel of the present invention manufactured using a fiber reinforced thermosetting resin prepreg. In FIG. 1, 10 is a steering wheel main body, 11 is a rim portion,
Reference numeral 12 is a spoke portion, 13 is a boss plate portion, and 14 is a boss metal fitting. In this automobile steering wheel, a rim portion 11, a spoke portion 12, and a boss plate portion 13 are integrally hollow-molded with a fiber reinforced thermosetting resin prepreg, and a boss metal fitting 14 is integrally molded with the boss plate portion 13 at the time of molding. Has been done.
【０００９】図２は、図１におけるＡ−Ａ′断面の一部
拡大図であり、１５は繊維強化熱硬化性樹脂複合材料を
示し、繊維強化熱硬化性樹脂プリプレグを用いて製造さ
れている。１６は発泡樹脂を示しており、発泡性樹脂基
材を用いて製造されている。この繊維強化熱硬化性樹脂
複合材料１５と発泡樹脂１６は、要求されるステアリン
グホイールの強度に応じて、それぞれ一層又は複数層に
任意に積層されて成形されている。FIG. 2 is a partially enlarged view of a cross section taken along the line AA 'in FIG. 1. Reference numeral 15 denotes a fiber-reinforced thermosetting resin composite material, which is manufactured by using a fiber-reinforced thermosetting resin prepreg. . Reference numeral 16 denotes a foamed resin, which is manufactured using a foamable resin base material. The fiber-reinforced thermosetting resin composite material 15 and the foamed resin 16 are formed by arbitrarily laminating each in a single layer or a plurality of layers according to the required strength of the steering wheel.
【００１０】図３は、図１におけるＢ−Ｂ′断面図であ
る。図４は、本発明の自動車用ステアリングホイールを
成形金型で加熱加圧成形する際の、積層体を成形金型に
セットした時のＢ−Ｂ′断面図である。３０は最終的に
中空部となる部分に充填されている低融点合金からなる
芯金、４０は雄金型及び雌金型よりなる成形金型であ
る。FIG. 3 is a sectional view taken along line BB 'in FIG. FIG. 4 is a cross-sectional view taken along the line BB ′ when the laminated body is set in the molding die when the automobile steering wheel of the present invention is heated and pressed by the molding die. Reference numeral 30 denotes a core metal made of a low melting point alloy which is finally filled in the hollow portion, and 40 denotes a molding die made of a male die and a female die.
【００１１】次に本発明の自動車用ステアリングホイー
ルの製造方法を説明する。低融点合金を溶融し、ステア
リングホイールの形状をした鋳型に流し込んで、芯金３
０を製造する。その鋳型には、金型、砂型等が用いられ
る。また、芯金３０の成形方法としてダイキャスト法に
よる方法も用いることができる。そして、該芯金３０を
製造する金型は、製造されるステアリングホイールの肉
厚分だけ小さく作られる。Next, a method of manufacturing the automobile steering wheel of the present invention will be described. The low melting point alloy is melted and poured into a mold having the shape of a steering wheel, and the core metal 3
0 is produced. A mold, a sand mold, or the like is used as the mold. Further, a die-casting method can be used as a molding method of the cored bar 30. The mold for manufacturing the cored bar 30 is made smaller by the thickness of the steering wheel to be manufactured.
【００１２】次に、得られた芯金３０上に繊維強化熱硬
化性樹脂プリプレグを被覆し、その上に発泡樹脂１６と
するための発泡性樹脂基材を積層する、さらにその上に
繊維強化熱硬化性樹脂複合材料１５を形成するための繊
維強化熱硬化性樹脂プリプレグを積層する。また、芯金
３０上に直接、発泡性樹脂基材を被覆することもでき
る。これらの繊維強化熱硬化性樹脂プリプレグ及び発泡
性樹脂基材は、求められるステアリングホイールの強度
に応じて、１層又は複数層積層する。この積層された芯
金３０を含む積層体を、図４に示した成形金型４０にセ
ットして加熱加圧成形して、前記積層体を発泡させる。Next, the obtained cored bar 30 is coated with a fiber reinforced thermosetting resin prepreg, and a foamable resin base material for forming the foamed resin 16 is laminated thereon, and further fiber reinforced. A fiber-reinforced thermosetting resin prepreg for forming the thermosetting resin composite material 15 is laminated. Further, the core metal 30 may be directly coated with the foamable resin base material. These fiber-reinforced thermosetting resin prepregs and foamable resin substrates are laminated in one layer or a plurality of layers depending on the required strength of the steering wheel. The laminated body including the laminated cored bar 30 is set in the molding die 40 shown in FIG. 4 and heated and pressed to foam the laminated body.
【００１３】このようにして製造された自動車用ステア
リングホイール本体１０は、リム部１１、スポーク部１
２及びボスプレート部１３が繊維強化熱硬化性樹脂プリ
プレグにて一体中空成形されており、また、ボスプレー
ト部１３にボス金具１４が一体成形されている。前記ス
テアリングホイール本体１０の剛性部分である繊維強化
熱硬化性樹脂複合材料１５を製造するための強化繊維熱
硬化性樹脂プリプレグに用いられる強化繊維には、炭素
繊維、ガラス繊維、アラミド繊維、アルミナ繊維、セラ
ミックス繊維、炭化珪素繊維、ボロン繊維、高分子量ポ
リエチレン繊維、高強力ポリアリレート繊維、ポリアミ
ド繊維等が用いられる。その強化繊維の使用形態は一方
向引揃えタイプ、平織物、朱子織物、編物、組紐、スト
ランドであり繊維はフィラメントを使用したものが好ま
しい。また、繊維強化熱硬化性樹脂プリプレグを構成す
る強化樹脂には、エポキシ樹脂、不飽和ポリエステル樹
脂、ポリイミド樹脂、フェノール樹脂、ポリウレタン樹
脂等の熱硬化性樹脂が用いられる。The steering wheel body 10 for an automobile manufactured in this manner has a rim portion 11 and a spoke portion 1.
2 and the boss plate portion 13 are integrally hollow-molded with a fiber reinforced thermosetting resin prepreg, and the boss metal fitting 14 is integrally molded with the boss plate portion 13. Reinforcing fiber for producing the fiber-reinforced thermosetting resin composite material 15 which is the rigid portion of the steering wheel body 10 The reinforcing fibers used in the thermosetting resin prepreg include carbon fiber, glass fiber, aramid fiber and alumina fiber. , Ceramic fibers, silicon carbide fibers, boron fibers, high molecular weight polyethylene fibers, high-strength polyarylate fibers, polyamide fibers and the like are used. The usage form of the reinforcing fiber is a unidirectionally aligned type, a plain woven fabric, a satin woven fabric, a knitted fabric, a braid, and a strand, and the fiber is preferably a filament. Further, as the reinforcing resin constituting the fiber reinforced thermosetting resin prepreg, thermosetting resin such as epoxy resin, unsaturated polyester resin, polyimide resin, phenol resin, polyurethane resin or the like is used.
【００１４】本発明で用いられる繊維強化熱硬化性樹脂
プリプレグには、通常、強化繊維である一方向引揃えタ
イプ、平織物、朱子織物、編物、組紐、ストランドの形
態のプリプレグを１種又は２種以上使用して成形するこ
とができる。前記強化繊維に対する熱硬化性樹脂量は、
成形前の段階で、通常、樹脂を２０〜９０重量％含むも
のが好ましい。特に好ましくは、３０〜５０重量％であ
る。その理由は、３０重量％未満の場合は、強化繊維内
への樹脂の未含浸部分が多くなり成形後製品表面の仕上
がりが悪くなり、５０重量％超の場合は、繊維強化熱硬
化性樹脂プリプレグの取り扱い性が悪くなり、成形時に
必要以上の樹脂をフローさせなければならないからであ
る。The fiber-reinforced thermosetting resin prepreg used in the present invention is usually one or two types of prepreg in the form of reinforcing fibers such as unidirectionally aligned type, plain woven fabric, satin woven fabric, knitted fabric, braid and strand. It can be molded by using more than one kind. The amount of thermosetting resin for the reinforcing fiber,
Usually, it is preferable to contain the resin in an amount of 20 to 90% by weight before molding. Particularly preferably, it is 30 to 50% by weight. The reason is that if the amount is less than 30% by weight, the unimpregnated portion of the resin in the reinforcing fibers is large and the finished product surface is poor. If the amount is more than 50% by weight, the fiber reinforced thermosetting resin prepreg is used. This is because the handling property becomes worse and it is necessary to flow more resin than necessary during molding.
【００１５】また、成形後の強化繊維量は、１０〜８０
体積％含むものが好ましい。特に好ましくは４０〜６０
体積％である。その理由は、４０体積％未満の場合は、
強化繊維の特性を十分に発揮できず、６０体積％超の場
合は、強化繊維間の樹脂が少なくなり強化繊維相互が干
渉するため物性が低下するからである。本発明において
発泡性樹脂基材は、繊維強化熱硬化性樹脂プリプレグの
積層間及び／又は芯金の表面に配設せしめることによ
り、加圧成形時、発泡性樹脂基材が発泡し、金型面及び
芯金面に強化樹脂とともに均一且つ容易に間隙なく膨着
することができる。もし、発泡性樹脂基材を使用せず、
繊維強化熱硬化性樹脂プリプレグのみの場合は金型間及
び芯金面に均一に樹脂がフローせず間隙が生ずるという
不都合がある。The amount of reinforcing fibers after molding is 10 to 80.
Those containing a volume% are preferable. Particularly preferably 40 to 60
% By volume. The reason is that if less than 40% by volume,
This is because the properties of the reinforcing fibers cannot be sufficiently exhibited, and when the content is more than 60% by volume, the amount of resin between the reinforcing fibers decreases and the reinforcing fibers interfere with each other, resulting in deterioration of physical properties. In the present invention, the expandable resin base material is disposed between the laminated layers of the fiber reinforced thermosetting resin prepreg and / or on the surface of the core metal, so that the foamable resin base material foams during pressure molding, resulting in a mold. It is possible to uniformly and easily swell the surface and the core metal surface together with the reinforced resin without a gap. If you do not use a foaming resin substrate,
In the case of only the fiber reinforced thermosetting resin prepreg, there is a disadvantage that the resin does not flow uniformly between the molds and on the surface of the core metal, resulting in a gap.
【００１６】これらの発泡性樹脂基材は、エポキシ樹
脂、ポリウレタン樹脂、フェノール樹脂、ユリア樹脂、
珪素樹脂等の熱硬化性樹脂にあらかじめ発泡剤が添加さ
れているもの、あるいは発泡性樹脂基材を調製する際に
添加して使用することができる。芯金３０は、最終的に
溶融されて除去され、芯金３０が存在していた部分は中
空部が形成されるので、その材料には、ステアリングホ
イールを構成する熱硬化性樹脂の熱硬化温度よりも高
く、その樹脂の耐熱温度以下の融点を有する低融点合
金、例えば、マグネシウム、亜鉛、鉛、錫、アルミニウ
ム、ビスマス、アンチモン等の２種類以上の金属からな
る低融点合金が使用される。These expandable resin base materials include epoxy resin, polyurethane resin, phenol resin, urea resin,
It can be used by adding a foaming agent to a thermosetting resin such as a silicone resin in advance, or by adding it when preparing a foamable resin substrate. The cored bar 30 is finally melted and removed, and a hollow part is formed in the part where the cored bar 30 was present. Therefore, the material is made of the thermosetting temperature of the thermosetting resin constituting the steering wheel. A low melting point alloy having a melting point higher than the heat resistant temperature of the resin, for example, a low melting point alloy composed of two or more kinds of metals such as magnesium, zinc, lead, tin, aluminum, bismuth and antimony is used.
【００１７】[0017]
〔実施例１〕錫とビスマスからなる融点１４０℃の低融
点合金を溶融後、予めステアリングホイールの肉厚分だ
け小さく製作された鋳型内に流し込み、ステアリングホ
イールの芯金を形成するための低融点合金で鋳造された
鋳造芯金を製作した。[Example 1] A low melting point alloy having a melting point of 140 ° C composed of tin and bismuth is melted, and then poured into a mold which is made small in advance by the thickness of the steering wheel to form a core metal of the steering wheel. A cast cored bar made of alloy was produced.
【００１８】この芯金上にビスフェノール系エポキシ樹
脂を含浸させた炭素繊維束（東邦レ−ヨン（株）製ベス
ファイト（登録商標）７μｍ×３０００本）を一方向に
引揃えてなる繊維強化熱硬化性樹脂プリプレグ及び同炭
素繊維からなる平織物プリプレグをそれぞれ積層した。
積層に際し、層間に発泡性樹脂基材として発泡性エポキ
シ樹脂シートを介在させた。A fiber-reinforced heat obtained by unidirectionally aligning a carbon fiber bundle (Vesphite (registered trademark) 7 μm × 3000 pieces manufactured by Toho Rayon Co., Ltd.) impregnated with a bisphenol epoxy resin on the core metal. A curable resin prepreg and a plain woven prepreg made of the same carbon fiber were laminated.
At the time of stacking, a foamable epoxy resin sheet as a foamable resin substrate was interposed between the layers.
【００１９】得られた芯金を含む積層体をステアリング
ホイールの成形金型に配置したのち、成形金型を１３０
℃×２時間加熱・加圧し、繊維強化熱硬化性樹脂プリプ
レグの硬化と発泡性エポキシ樹脂シートの発泡を行っ
た。成形後、成形物を成形金型より取り出し、予め１４
２℃程度に加熱されたオイルバス内に投入し、芯金を形
成している低融点合金を溶出させた。The laminated body containing the obtained cored bar was placed in the molding die of the steering wheel, and then the molding die was set to 130.
The fiber-reinforced thermosetting resin prepreg was cured and the expandable epoxy resin sheet was foamed by heating and pressurizing at ℃ × 2 hours. After molding, remove the molded product from the molding die and
It was put into an oil bath heated to about 2 ° C. to elute the low melting point alloy forming the core metal.
【００２０】得られたステアリングホイールは、リム
部、スポーク部、ボスプレート部及びボス金具が一体中
空成形されており、重量が５００ｇの軽量で、且つ外観
も良好であった。 〔実施例２〕錫、ビスマス、アンチモンからなる融点１
５０℃の低融点合金を溶融したのち、予めステアリング
ホイールの肉厚分小さく作製された鋳型内に流し込み、
低融点合金製の鋳造芯金を作製した。The obtained steering wheel had a rim portion, a spoke portion, a boss plate portion and a boss metal fitting integrally formed in a hollow shape, was lightweight with a weight of 500 g, and had a good appearance. Example 2 Melting point 1 composed of tin, bismuth and antimony
After melting the low-melting point alloy at 50 ° C, pour it into a mold that is made small in advance by the thickness of the steering wheel,
A cast cored bar made of a low melting point alloy was produced.
【００２１】この芯金上にビニルエステル樹脂を含浸さ
せた炭素繊維束（東邦レーヨン（株）製ベスファイト
（登録商標）７μｍ×３０００本）を一方向に引揃えて
なるプリプレグ及び同炭素繊維からなる平織物プリプレ
グをそれぞれ積層した。積層に際し、層間に発泡性樹脂
基材として発泡性エポキシ樹脂シートを介在させた。得
られた積層体をステアリングホイールの成形金型に配置
したのち、成形金型を１４０℃×３０分加熱・加圧し、
熱硬化性樹脂プリプレグの硬化と発泡エポキシ樹脂シー
トの発泡を行った。A carbon fiber bundle (Vesfite (registered trademark) 7 μm × 3000 pieces manufactured by Toho Rayon Co., Ltd.) in which a vinyl ester resin is impregnated on the core metal is aligned in one direction to form a prepreg and the carbon fiber. The plain fabric prepregs were laminated. At the time of stacking, a foamable epoxy resin sheet as a foamable resin substrate was interposed between the layers. After placing the obtained laminated body in the molding die of the steering wheel, the molding die is heated and pressed at 140 ° C. for 30 minutes,
The thermosetting resin prepreg was cured and the foamed epoxy resin sheet was foamed.
【００２２】成形後、成形物を金型より取り出し、予め
１５２℃程度に加熱されたオイルバス内に投入し、低融
点合金を溶出させた。得られた繊維強化熱硬化性樹脂製
自動車用ステアリングホイールは、リム部、スポーク
部、ボスプレート部及びボス金具が一体成形された、重
量５０５ｇの計量で且つ外観も良好であった。After molding, the molded product was taken out of the mold and put into an oil bath preheated to about 152 ° C. to elute the low melting point alloy. The obtained fiber-reinforced thermosetting resin-made steering wheel for automobiles had a rim portion, a spoke portion, a boss plate portion, and a boss metal fitting integrally molded, weighed 505 g, and had a good appearance.
【００２３】〔実施例３〕ビスマスとアンチモンからな
る融点１２４℃の低融点合金を溶融したのち、予めステ
アリングホイールの肉厚分小さく作製された鋳型内に流
し込み、低融点合金製の鋳造芯金を作製した。この芯金
上にビニルエステル樹脂を含浸させた炭素繊維束（東邦
レーヨン（株）製ベスファイト（登録商標）７μｍ×３
０００本）を一方向に引揃えてなるプリプレグ及び同炭
素繊維からなる平織物プリプレグをそれぞれ積層した。
積層に際し、層間に発泡性樹脂基材として発泡性エポキ
シ樹脂シートを介在させた。Example 3 A low melting point alloy of bismuth and antimony having a melting point of 124 ° C. is melted and then poured into a mold made in advance to have a small wall thickness of a steering wheel, and a cast cored bar made of the low melting point alloy is obtained. It was made. A carbon fiber bundle in which a vinyl ester resin is impregnated on the core metal (Vesphite (registered trademark) 7 μm × 3 manufactured by Toho Rayon Co., Ltd.)
000 pieces) were aligned in one direction and a plain weave prepreg made of the same carbon fiber was laminated.
At the time of stacking, a foamable epoxy resin sheet as a foamable resin substrate was interposed between the layers.
【００２４】得られた積層体をステアリングホイールの
成形金型に配置したのち、成形金型を１１０℃×２時間
加熱・加圧し、熱硬化性樹脂プリプレグの硬化と発泡エ
ポキシ樹脂シートの発泡を行った。成形後、成形物を金
型より取り出し、予め１３０℃程度に加熱されたオイル
バス内に投入し、低融点合金を溶出させた。After placing the obtained laminated body in the molding die of the steering wheel, the molding die is heated and pressed at 110 ° C. for 2 hours to cure the thermosetting resin prepreg and foam the foamed epoxy resin sheet. It was After molding, the molded product was taken out of the mold and put into an oil bath preheated to about 130 ° C. to elute the low melting point alloy.
【００２５】得られた繊維強化熱硬化性樹脂製自動車用
ステアリングホイールは、リム部、スポーク部、ボスプ
レート部及びボス金具が一体成形された、重量５１０ｇ
の計量で且つ外観も良好であった。 〔比較例〕鋳造により製作された鉄製の芯金に、ボス金
具を溶接により接合した。この芯金をステアリングホイ
ール成形金型に配置した。なお成形金型の型面には、予
め、成形後にステアリングホイールの表皮となるゴムを
配置した。次いで、型締め後、樹脂注入機により、発泡
ポリウレタン樹脂を芯金とゴムの空間部に注入し、発泡
成形した。The obtained fiber reinforced thermosetting resin automobile steering wheel has a rim portion, a spoke portion, a boss plate portion and a boss fitting integrally molded, and has a weight of 510 g.
And the appearance was also good. [Comparative Example] A boss metal fitting was welded to an iron cored bar manufactured by casting. This core metal was placed in a steering wheel molding die. Note that rubber, which will be the skin of the steering wheel after molding, was previously arranged on the mold surface of the molding die. Next, after mold clamping, a polyurethane resin was injected into the space between the core metal and the rubber by a resin injection machine, and foam molding was performed.
【００２６】得られたステアリングホイールは、鉄製の
芯金を有する中実で、重量が２ｋｇであった。The obtained steering wheel was solid with an iron cored bar and weighed 2 kg.
【００２７】[0027]
【発明の効果】本発明の自動車用ステアリングホイール
は、繊維強化複合材料からなるリム部、スポーク部、ボ
スプレート部及びボス金具が一体中空成形されて製作さ
れており、ステアリングホイール内部を中空とし、ま
た、金属製の芯金は使用していないため、軽量で且つ強
度が高い。The automobile steering wheel of the present invention is manufactured by integrally hollow-molding a rim portion, a spoke portion, a boss plate portion and a boss fitting made of a fiber reinforced composite material, and making the inside of the steering wheel hollow. Further, since a metal cored bar is not used, it is lightweight and has high strength.
【００２８】また、ステアリングホイールのリム部、ス
ポーク部、ボスプレート部及びボス金具の接合部は、繊
維強化複合材料を長繊維の状態で連続的に配設している
ため、軽量で且つ負荷に十分耐え得る強度を有してい
る。Further, since the rim portion of the steering wheel, the spoke portion, the boss plate portion, and the joint portion of the boss metal fittings are continuously laid with the fiber-reinforced composite material in the form of long fibers, they are lightweight and load-resistant. It has sufficient strength to withstand.
【図１】繊維強化熱硬化性樹脂プリプレグを用いて製造
された本発明の自動車用ステアリングホイールの一例を
示す平面図。FIG. 1 is a plan view showing an example of an automobile steering wheel of the present invention manufactured using a fiber reinforced thermosetting resin prepreg.
【図２】図１中のＡ−Ａ′断面の一部拡大図。FIG. 2 is a partially enlarged view of the AA ′ cross section in FIG.
【図３】図１中のＢ−Ｂ′断面図。3 is a sectional view taken along line BB ′ in FIG.
【図４】硬化前の積層体を成形金型にセットした時のＢ
−Ｂ′の断面図。FIG. 4B when the laminated body before curing is set in a molding die
-B 'sectional drawing.
【符号の説明】 １０ ステアリングホイール本体 １１ リム部 １２ スポーク部 １３ ボスプレート部 １４ ボス金具 １５ 繊維強化熱硬化性樹脂複合材料 １６ 発泡樹脂 ２０ 中空部 ３０ 芯金 ４０ 成形金型[Explanation of reference numerals] 10 Steering wheel body 11 Rim portion 12 Spoke portion 13 Boss plate portion 14 Boss metal fitting 15 Fiber reinforced thermosetting resin composite material 16 Foam resin 20 Hollow portion 30 Core metal 40 Molding die
Claims (8)
リム部、スポーク部及びボスプレート部からなるステア
リングホイールが一体中空成形されていることを特徴と
する自動車用ステアリングホイール。1. A fiber-reinforced thermosetting resin prepreg,
A steering wheel for an automobile, wherein a steering wheel including a rim portion, a spoke portion, and a boss plate portion is integrally hollow-molded.
ート部からなるステアリングホイールの中空部となるべ
き部分の形状と同じ形状の芯金を低融点合金にて製造
し、 （２）製造された芯金の外周部に、繊維強化熱硬化性樹
脂プリプレグを積層するとともに該積層間及び／又は芯
金の表面に発泡性樹脂基材を積層してそれぞれ１層又は
複数層からなる積層体とし、 （３）得られた積層体を金型にて加熱加圧成形して硬化
と同時に発泡を行ない、 （４）芯金を加熱溶融し、成形体から低融点合金を排出
して成形体を中空形状とすることを特徴とする自動車用
ステアリングホイールの製造方法。2. A core metal having the same shape as the shape of a portion of a steering wheel, which is composed of a rim portion, a spoke portion, and a boss plate portion, to be a hollow portion, is made of a low melting point alloy, and (2) is manufactured. Further, a fiber-reinforced thermosetting resin prepreg is laminated on the outer peripheral portion of the cored bar, and a foamable resin base material is laminated between the laminated layers and / or on the surface of the cored bar to form a laminate composed of one layer or a plurality of layers, respectively. (3) The obtained laminated body is heated and pressed in a mold to be cured and foamed at the same time. (4) The cored bar is heated and melted, and the low melting point alloy is discharged from the molded body to form a molded body. A method for manufacturing a steering wheel for an automobile, which has a hollow shape.
部に、ボス金具を一体成形することを特徴とする請求項
２記載の自動車用ステアリングホイールの製造方法。3. The method of manufacturing a steering wheel for an automobile according to claim 2, wherein the laminated body is heat-pressed to integrally form a boss metal fitting on the boss plate portion.
鉛、錫、アルミニウム、ビスマス、アンチモンから選ば
れた２種類以上の金属である請求項２記載の自動車用ス
テアリングホイールの製造方法。4. The low melting point alloy is magnesium, zinc,
The method for manufacturing a steering wheel for an automobile according to claim 2, wherein the metal is two or more kinds of metals selected from lead, tin, aluminum, bismuth, and antimony.
ミド繊維、アルミナ繊維、セラミックス繊維、炭化珪素
繊維、ボロン繊維、高分子量ポリエチレン繊維、高強力
ポリアクリレート繊維、ポリアミド繊維等である請求項
２記載の自動車用ステアリングホイールの製造方法。5. The reinforcing fiber is carbon fiber, glass fiber, aramid fiber, alumina fiber, ceramics fiber, silicon carbide fiber, boron fiber, high molecular weight polyethylene fiber, high strength polyacrylate fiber, polyamide fiber or the like. Manufacturing method of automobile steering wheel.
ステル樹脂、ポリイミド樹脂、フェノール樹脂、ポリウ
レタン樹脂等の熱硬化性樹脂である請求項２記載の自動
車用ステアリングホイールの製造方法。6. The method of manufacturing an automobile steering wheel according to claim 2, wherein the reinforcing resin is a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a polyimide resin, a phenol resin, or a polyurethane resin.
レタン樹脂、フェノール樹脂、ユリア樹脂、珪素樹脂か
ら選ばれた１種又は２種以上の熱硬化性樹脂である請求
項２記載の自動車用ステアリングホイールの製造方法。7. The automobile steering wheel according to claim 2, wherein the foamable resin substrate is one or more thermosetting resins selected from epoxy resins, polyurethane resins, phenol resins, urea resins, and silicone resins. Wheel manufacturing method.
向プリプレグ、織物プリプレグ、織物プリプレグ、編物
プリプレグ、ストランドプリプレグ、組紐プリプレグで
ある請求項２記載の自動車用ステアリングホイールの製
造方法。8. The method for manufacturing an automobile steering wheel according to claim 2, wherein the fiber-reinforced thermosetting resin prepreg is a unidirectional prepreg, a woven prepreg, a woven prepreg, a knitted prepreg, a strand prepreg, or a braided prepreg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5004261A JPH06206548A (en) | 1993-01-13 | 1993-01-13 | Automobile steering wheel and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5004261A JPH06206548A (en) | 1993-01-13 | 1993-01-13 | Automobile steering wheel and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06206548A true JPH06206548A (en) | 1994-07-26 |
Family
ID=11579605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5004261A Pending JPH06206548A (en) | 1993-01-13 | 1993-01-13 | Automobile steering wheel and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06206548A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997030871A1 (en) * | 1996-02-26 | 1997-08-28 | Winget Larry J | Composite steering wheel and air bag cover |
| US5899118A (en) * | 1996-01-26 | 1999-05-04 | Toho Rayon Co., Ltd. | Steering wheel and method of manufacture |
| KR101394875B1 (en) * | 2014-02-17 | 2014-05-14 | (주)에이엠피테크 | Process for an assembly type carbon fiber composite wheel and an assembly type carbon fiber composite wheel thereby |
| JP2014534914A (en) * | 2011-10-19 | 2014-12-25 | ヘクセル コーポレイション | High pressure molding of composite parts |
| JP2016524564A (en) * | 2013-05-27 | 2016-08-18 | オートリブ ディベロップメント エービー | Vehicle steering wheel |
-
1993
- 1993-01-13 JP JP5004261A patent/JPH06206548A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899118A (en) * | 1996-01-26 | 1999-05-04 | Toho Rayon Co., Ltd. | Steering wheel and method of manufacture |
| WO1997030871A1 (en) * | 1996-02-26 | 1997-08-28 | Winget Larry J | Composite steering wheel and air bag cover |
| US5765864A (en) * | 1996-02-26 | 1998-06-16 | Winget; Larry J. | Unitary composite steering wheel and air bag cover assembly and method of making same |
| JP2014534914A (en) * | 2011-10-19 | 2014-12-25 | ヘクセル コーポレイション | High pressure molding of composite parts |
| JP2016524564A (en) * | 2013-05-27 | 2016-08-18 | オートリブ ディベロップメント エービー | Vehicle steering wheel |
| KR101394875B1 (en) * | 2014-02-17 | 2014-05-14 | (주)에이엠피테크 | Process for an assembly type carbon fiber composite wheel and an assembly type carbon fiber composite wheel thereby |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0722826B1 (en) | Resin transfer molding with honeycomb core and core filler | |
| US5567499A (en) | Resin transfer molding in combination with honeycomb core | |
| EP1721719B1 (en) | Rtm molding method and device | |
| US8257823B2 (en) | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin | |
| US20050104441A1 (en) | Fiber reinforced composite wheels | |
| JP3118528B2 (en) | Steering wheel and method of manufacturing the same | |
| JPWO2018051445A1 (en) | Method of forming composite material and composite material | |
| EP1829661B1 (en) | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin | |
| US5171509A (en) | Process for assembling a ski by duplicate molding and ski obtained by use of this process | |
| KR20170127613A (en) | Method and apparatus for molding seatback frame | |
| CN108284618A (en) | Structure member and its manufacturing method made of composite material | |
| JPH06206548A (en) | Automobile steering wheel and manufacture thereof | |
| CN109664524A (en) | The moulding process of fibre reinforced composites reinforcing beam and the vehicle for using the technique | |
| EP1378433A1 (en) | Hollow bicycle crank | |
| JPS61135801A (en) | Wheel | |
| US5081861A (en) | Resin die for sheet metal pressing and method for producing same | |
| GB2259667A (en) | Method for manufacturing an integral moulded body | |
| KR102420046B1 (en) | Forming method of composite material | |
| JP4100718B2 (en) | Composite plastic material tip for safety footwear and manufacturing method thereof | |
| JPH03161326A (en) | Pipe fitted with flange made of fiber reinforced composite material and preparation thereof | |
| JPH04176611A (en) | Molding die made of fiber reinforced composite material | |
| JPS6227107Y2 (en) | ||
| Park et al. | Manufacture of carbon fiber composites | |
| JPH1158536A (en) | Manufacture of fiber reinforced resin composite body | |
| JPS6172529A (en) | Manufacture of composite material |