JP4015584B2 - Door and manufacturing method thereof - Google Patents

Door and manufacturing method thereof Download PDF

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Publication number
JP4015584B2
JP4015584B2 JP2003137216A JP2003137216A JP4015584B2 JP 4015584 B2 JP4015584 B2 JP 4015584B2 JP 2003137216 A JP2003137216 A JP 2003137216A JP 2003137216 A JP2003137216 A JP 2003137216A JP 4015584 B2 JP4015584 B2 JP 4015584B2
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Japan
Prior art keywords
door
fiber
mold
core material
prepreg
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JP2003137216A
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Japanese (ja)
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JP2004339778A (en
JP2004339778A5 (en
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恒男 高野
正 酒井
豊 山口
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Mitsubishi Chemical Corp
Mitsubishi Rayon Co Ltd
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Mitsubishi Chemical Corp
Mitsubishi Rayon Co Ltd
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【0001】
【発明の属する技術分野】
本発明は、軽量で、かつ曲げ剛性の高いドアおよびその製造方法に関する。
【0002】
【従来の技術】
鉄道車両のドアとしては、例えば、図6に示すような、両面に設けられた表面材11,11と、これらに挟まれた芯材12とを互いに接着剤13で接着してなるものがある(特許公報1参照)。このドア10には、例えば乗客が寄りかかっても変形しないように、十分な曲げ剛性、つぶし剛性等の剛性が要求される。そのため、芯材12は、枠材14と、これに内装されたハニカムコア15とからなるものとされている(特許公報1参照)。
【0003】
また、鉄道車両の高速化、軽量化の要求に伴い、ドアにも軽量化が要求されている。この要求に対して、ドアの表面材および芯材をステンレスやアルミニウムで形成することは行われている。しかしながら、表面および芯材をステンレスやアルミニウムにしても、十分な強度を有するハニカムコアの形成には多くの材料が必要となるため、軽量化には限度があった。
【0004】
【特許文献1】
特開平9−235956号公報(図2参照)
【0005】
【発明が解決しようとする課題】
よって、本発明の目的は、十分な剛性を保ちつつ、軽量化されたドアおよびその製造方法を提供することにある。
【0006】
【課題を解決するための手段】
すなわち、本発明の要旨は、以下の1)〜3)の工程を有してなるドアの製造方法にある。
1)芯材用金型の下型の表面にプリプレグを積層し、芯材用金型を閉じ、加熱加圧してプリプレグ積層体を硬化して、芯材を得る工程
2)表面材用金型の下型の補強リブに対応する溝にシートモールディングコンパウンドを充填し、さらに、プリプレグを積層し、表面材用金型を閉じ、加熱加圧して、シートモールディングコンパウンドとプリプレグ積層体を一体硬化して、表面材を得る工程
3)芯材の両面に表面材を接着する工程
【0008】
また、本発明のドアは、両面に設けられた繊維強化複合材料からなる表面材と、これら表面材に挟まれた繊維強化複合材料からなる複数の凹条または凸条を有する板状の芯材とを具備するドアであり、ドアの側縁近傍に、片側の表面材と一体成形され、かつ両面の表面材を連結する補強リブが設けられていることを特徴とする
ここで、前記補強リブは、繊維強化複合材料からなるものであることが望ましい
【0009】
【発明の実施の形態】
以下、本発明について詳細に説明する。
図1〜図3は、本発明のドアの一例を示す図である。このドア20は、上半分の中央に窓(穴)が形成された2枚の表面材21,21と、上半分の中央に窓(穴)が形成され、そして2枚の表面材21,21に挟まれた芯材22と、表面材21の窓側の周縁部にゴムパッキン23を介して取り付けられる窓ガラス24とを具備して概略構成されるものである。
【0010】
ここで、芯材22は、繊維強化複合材料からなる板状のものであり、図4に示すように、これ自体が屈曲してなる、ドア20の上下方向に延びる複数の凹条25が形成されているものである。
凹条25は、断面略台形のものである。凹条25の側面の傾斜角度αは、表面材21に直交する方向を0゜としたとき、傾斜角度αが2〜30゜、特に5〜20°の範囲にあれば、ドア20の曲げ剛性がより高くなるので好ましい。
【0011】
また、凹条25のピッチは、凹条25の底面の中心から隣の凹条25の底面の中心までの長さが50〜200mmとなるように設定されること好ましく、特に、100〜140mmとなるように設定されることが好ましい。凹条25のピッチがこの範囲にあれば、ドア20の軽量化と剛性とのバランスが良好となる。すなわち、凹条25のピッチが50mm未満では、ドア20の剛性は高くなるが、芯材22の材料が増え、ドア20が重くなる傾向があり、一方、凹条25のピッチが200mmを超えると、芯材22は軽くなるが、ドア20の剛性が低くなる傾向がある。
【0012】
芯材22を構成する繊維強化複合材料は、樹脂のマトリックスを強化繊維で補強したものである。
樹脂としては、熱硬化性樹脂、熱可塑性樹脂が挙げられ、中でも剛性の点で、熱硬化性樹脂が好適に用いられる。熱硬化性樹脂としては、例えば、エポキシ樹脂、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリイミド樹脂、マレイミド樹脂、フェノール樹脂等が挙げられる。補強繊維として炭素繊維を用いる場合は、炭素繊維との接着性の点で、エポキシ樹脂、ビニルエステル樹脂が好適に用いられる。
【0013】
補強繊維としては、例えば、炭素繊維、ガラス繊維、アラミド繊維、ボロン繊維、炭化珪素繊維、高強度ポリエチレン、PBO繊維、ステンレススチール繊維などが挙げられ、中でも軽量化と剛性の点で、炭素繊維が好適に用いられる。
また、補強繊維としては、長繊維および短繊維が挙げられ、中でも剛性の点で、長繊維が好適に用いられる。
【0014】
長繊維の形態としては、一方向に揃えられたもの、長繊維からなる織物などが挙げられる。特に、剛性に優れる点で、ドア20の上下方向を0゜とした場合、長繊維が0゜および90゜に配向するように、一方向に揃えられた長繊維が積層した形態、または、長繊維からなる織物が積層された形態が好ましい。
【0015】
表面材21は、板状のものである。表面材21構成する材料としては、繊維強化複合材料、または従来の金属材料等が挙げられ、中でも、軽量化と剛性との両立の点で、繊維強化複合材料が好ましい。
繊維強化複合材料としては、芯材22の材料として例示したものを採用することができる。
【0016】
また、表面材21の片側側部には、この表面材21と芯材22を挟んで対向するもう一方の表面材21と連結する、ドア20の上下方向に延びる補強リブ26が一体に設けられている。
ドア20の両側部には、例えば図5に示すように、ドア20同士が当接する側部に設けられるクッション用のゴム27を取り付けるための係止部材28を設けたり、ドア20の開閉装置に接続する部品(図示略)を設けたりするための内部空間29が必要である。このような内部空間29をドア20に設けた場合、この内部空間29におけるドア20のつぶし剛性が不足する傾向がある。そのため、この内部空間29と芯材22とを仕切るように、ドア20の側縁近傍に、片側の表面材21と一体成形され、かつ両面の表面材21,21を連結する補強リブ26が設けられている。
【0017】
補強リブ26の材質としては、表面材21が繊維強化複合材料からなるものである場合、同様に繊維強化複合材料が用いられる。補強リブ26は、具体的には、短繊維と熱硬化性樹脂からなるシートモールディングコンパウンド(SMC)を硬化させたものである。短繊維および熱硬化性樹脂としては、例えば、上述の補強繊維および熱硬化性樹脂を用いることができる。
【0018】
ゴムパッキン23は、窓の形状に対応したリング状のものであり、外周面および内周面に円周方向に沿った溝が形成された断面略H形のものである。2枚の表面材21,21は、図3に示すように、窓側の周縁部30にて互いに接合するように絞り込まれ、その周縁部30にて接着剤31で接合されている。ゴムパッキン23の外周面の溝には、この2枚の表面材21,21の窓側の周縁部30が嵌合されている。また、ゴムパッキン23の内周面の溝には、窓ガラス24の周縁が嵌合されている。
【0019】
次に、このドア20の製造方法の一例について説明する。
まず、長繊維に熱硬化性樹脂を含浸したプリプレグを、上型と下型とからなる、芯材用の金型の下型表面に配置する。
次いで、金型を閉じ、下型および上型によってプリプレグを加熱しながらプレスする。圧縮成形後、金型を開き、図4に示すような、ドア20の上下方向に延びる複数の凹条25が形成された芯材22を得る。
【0020】
同様にして、上型と下型とからなり、下型に補強リブに対応する溝が形成された、表面材用の金型の下型の溝にSMCを充填し、さらに、下型表面に、長繊維に熱硬化性樹脂を含浸したプリプレグを配置する。
次いで、金型を閉じ、下型および上型によってSMCおよびプリプレグを加熱しながらプレスする。圧縮成形後、金型を開き、片側側部にドア20の上下方向に延びる補強リブ26が一体に形成された表面材21を得る。
【0021】
次いで、芯材22の両面に接着剤を塗布する。また、表面材21の窓側の周縁部および補強リブ26の接着面にも接着剤を塗布する。表面材21,21で芯材22を挟み込んだ後、これらを加圧、加熱することにより、芯材22の両面に表面材21,21を、硬化した接着剤31で接着し、さらに、表面材21の窓側の周縁部同士、および補強リブ26と他方の表層材21とを接着剤31で接着し、ドア20を得る。
【0022】
接着剤としては、例えば、2液型エポキシ樹脂接着剤、2液型ウレタン接着剤、ゴム強化メチルメタクリレートなどを用いることができる。
プリプレグとしては、一方向に引き揃えられた長繊維に熱硬化性樹脂を含浸した一方向プリプレグ、および長繊維の織物に熱硬化性樹脂を含浸したファブリックプリプレグなどを用いることができる。
【0023】
プリプレグを下型表面に配置する際は、複数のプリプレグを積層することが好ましい。また、複数の一方向プリプレグを積層する場合は、長繊維がドア20の上下方向および水平方向に配向するように、一方向プリプレグを、その長繊維の方向をずらしながら積層することが好ましい。また、一方向プリプレグとファブリックプリプレグを積層してもよい。
【0024】
以上説明したドア20にあっては、繊維強化複合材料からなるものであるので、従来の金属製のドアに比べ、軽量化できる。また、芯材22に複数の凹条25が形成されているので、繊維強化複合材料を用い、かつ従来のものよりも軽量化したとしても、ドアに要求されるレベルの曲げ剛性、つぶし剛性等の剛性を十分に発揮できる。
【0025】
また、表面材21に、両面の表面材21,21を連結する補強リブ26が設けられているので、ドア20の両側部のつぶし剛性が、さらに向上している。また、この補強リブ26は、表面材21の片側側部に一体に形成されているので、ドア20の製造の際、補強リブを別部材として別途、表面材21に接着する必要がないので、ドア20の製造(組み立て)が容易となる。
また、芯材22は、圧縮成形で成形できるので、従来の金属のハニカムコアに比べ製造が容易である。
【0026】
なお、本発明のドアは、図示例のドア20には限定されず、両面に設けられた表面材と、これらに挟まれた芯材とを有し、芯材が、繊維強化複合材料からなる板状のものであり、かつ複数の凹条または凸条を有するものであればよい。
したがって、本発明のドアにおいては、必ずしも補強リブ26を設ける必要はない。
また、少なくとも芯材が、繊維強化複合材料であればよく、表面材は繊維強化複合材料であっても、金属であってもよい。ただし、ドアの軽量化の点から、表面材は繊維強化複合材料であることが好ましい。
【0027】
【実施例】
以下、実施例により本発明をさらに詳しく説明する。なお、本発明は実施例によって制限されるものではない。
本実施例においては、一方向プリプレグとして、三菱レイヨン(株)製、TR390E250S(熱硬化性樹脂:エポキシ樹脂、長繊維:炭素繊維)を用いた。また、ファブリックプリプレグとして、三菱レイヨン(株)製、TR3110G390(熱硬化性樹脂:エポキシ樹脂、長繊維:炭素繊維)を用いた。また、SMCとして、カンタム社製、AMC8590(熱硬化性樹脂:ビニルエステル樹脂、短繊維:炭素繊維)を用いた。
【0028】
まず、ファブリックプリプレグを芯材用下型の表面に8層積層した。次いで、金型を閉じ、下型および上型によってプリプレグを140℃で加熱しながら80kg/cm2 の圧力で5分間プレスして、プリプレグを一体硬化させた。圧縮成形後、金型を開き、図4に示す形状を有する、厚さ1.6mmの芯材を得た。
【0029】
これとは別に、SMCを、表面材用下型の、補強リブに対応する溝にSMCを充填した後、表面材用下型の表面に一方向プリプレグを、長繊維の配向がドアの上下方向を0゜として[0゜/0゜/90゜/0゜/0゜/0゜/90゜/0゜/0゜]となるように9層積層し、その上にファブリックプリプレグを1枚配置した。次いで、金型を閉じ、下型および上型によってSMCおよびプリプレグを140℃で加熱しながら80kg/cm2 の圧力で5分間プレスして、SMCおよびプリプレグを一体硬化させた。圧縮成形後、金型を開き、片側側部に補強リブを有する、厚さ2.5mmの表面材を得た。
【0030】
得られた芯材の両面に主剤(チバガイギ社製、アラルダイトAW106)と硬化剤(チバガイギ社製、ハードナーHV953U)とを質量比100:60で混合した2液型エポキシ樹脂接着剤を塗布した。また、表面材の窓側の周縁部および補強リブの接着面にも同じ接着剤を塗布した。そして、2枚の表面材で芯材を挟み込んだ後70℃で50分間養生して、芯材の両面に表面材を接着剤で接着し、ドアを得た。
このドアは、同じ大きさの従来のステンレス製のドアと同レベルの剛性を有しつつ、アルミニウム製のドアに比べ、約3割軽量化されていた。
【0031】
【発明の効果】
以上説明したように、本発明のドアは、両面に設けられた表面材と、これら表面材に挟まれた繊維強化複合材料からなる複数の凹条または凸条を有する板状の芯材とを具備するものであるので、十分な剛性を保ちつつ、軽量化できる。
このようなドアは、高速化、軽量化が要求されている鉄道車両用のドアとして好適である。また、軽量化が要求される航空機用ドア、自動車用ドアにも適用できる。
【0032】
また、前記表面材が、繊維強化複合材料からなるものであれば、さらに軽量化できる。
また、前記繊維強化複合材料が、熱硬化性樹脂のマトリックスを、一方向に揃えられた長繊維および/または長繊維の織物で補強したものであれば、曲げ剛性、つぶし剛性等の剛性がさらに向上する。
【0033】
また、ドアの側縁近傍に、片側の表面材と一体成形され、かつ両面の表面材を連結する補強リブが設けられていれば、ドアの側縁のつぶし剛性が改善される。
また、本発明のドアの製造方法は、長繊維に熱硬化性樹脂を含浸したプリプレグを圧縮成形して、複数の凹条または凸条を有する板状の芯材を製造し、該芯材の両面に、表面材を接着する方法であるので、十分な剛性を保ちつつ、軽量化されたドアを容易に製造することができる。
【図面の簡単な説明】
【図1】 本発明のドアの一例を示す正面図である。
【図2】 図1におけるII−II断面図である。
【図3】 図1におけるIII-III断面図である。
【図4】 本発明における芯材の一例を示す斜視図である。
【図5】 ドアの側部にクッション用のゴムを取り付けた例を示す断面図である。
【図6】 従来のドアの一例を示す断面図である。
【符号の説明】
20 ドア
21 表面材
22 芯材
25 凹条
26 補強リブ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door that is lightweight and has high bending rigidity, and a manufacturing method thereof.
[0002]
[Prior art]
As a door of a railway vehicle, for example, as shown in FIG. 6, there is a door formed by adhering surface materials 11, 11 provided on both surfaces and a core material 12 sandwiched between them with an adhesive 13. (See Patent Publication 1). The door 10 is required to have sufficient rigidity such as bending rigidity and crushing rigidity so as not to be deformed even when a passenger leans on the door 10. Therefore, the core material 12 is composed of a frame material 14 and a honeycomb core 15 incorporated therein (see Patent Publication 1).
[0003]
In addition, with the demand for higher speed and lighter railway vehicles, doors are also required to be lighter. In response to this requirement, the door surface material and the core material are made of stainless steel or aluminum. However, even if the surface and the core material are made of stainless steel or aluminum, many materials are required to form a honeycomb core having sufficient strength.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-235958 (see FIG. 2)
[0005]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a door that is reduced in weight while maintaining sufficient rigidity and a method for manufacturing the door.
[0006]
[Means for Solving the Problems]
That is, the gist of the present invention resides in a door manufacturing method comprising the following steps 1) to 3).
1) Step of laminating the prepreg on the surface of the lower mold of the core material mold, closing the core material mold, and curing the prepreg laminate by heating and pressing to obtain the core material 2) Mold for the surface material Fill the groove corresponding to the reinforcing rib of the lower mold with the sheet molding compound, laminate the prepreg, close the mold for the surface material, heat and press, and cure the sheet molding compound and the prepreg laminate integrally. Step of obtaining the surface material 3) Step of bonding the surface material to both surfaces of the core material
Further, the door of the present invention is a plate-like core material having a surface material made of a fiber-reinforced composite material provided on both surfaces and a plurality of concave or convex lines made of a fiber-reinforced composite material sandwiched between these surface materials. a door comprising the door, the side edges near the door are integrally molded with one side of the surface material, and wherein the reinforcing rib connecting the two sides of the surface material is provided.
Here, the reinforcing rib is preferably made of a fiber reinforced composite material .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
1-3 is a figure which shows an example of the door of this invention. The door 20 has two surface materials 21 and 21 in which a window (hole) is formed at the center of the upper half, and a window (hole) is formed in the center of the upper half, and the two surface materials 21 and 21 are formed. And a window glass 24 attached to a peripheral portion on the window side of the surface material 21 via a rubber packing 23.
[0010]
Here, the core material 22 is a plate-like material made of a fiber reinforced composite material, and as shown in FIG. 4, a plurality of concave stripes 25 extending in the vertical direction of the door 20 are formed. It is what has been.
The recess 25 has a substantially trapezoidal cross section. The inclination angle α of the side surface of the groove 25 is 2 to 30 °, particularly 5 to 20 ° when the direction orthogonal to the surface material 21 is 0 °. Is preferable because it becomes higher.
[0011]
Further, the pitch of the concave stripes 25 is preferably set so that the length from the center of the bottom face of the concave stripe 25 to the center of the bottom face of the adjacent concave stripe 25 is 50 to 200 mm, in particular, 100 to 140 mm. It is preferable to set so as to be. If the pitch of the concave stripes 25 is within this range, the balance between weight reduction and rigidity of the door 20 is good. That is, when the pitch of the concave stripes 25 is less than 50 mm, the rigidity of the door 20 increases, but the material of the core material 22 increases, and the door 20 tends to be heavy. On the other hand, when the pitch of the concave stripes 25 exceeds 200 mm. Although the core material 22 becomes light, the rigidity of the door 20 tends to be low.
[0012]
The fiber reinforced composite material constituting the core material 22 is obtained by reinforcing a resin matrix with reinforcing fibers.
Examples of the resin include a thermosetting resin and a thermoplastic resin. Among them, a thermosetting resin is preferably used in terms of rigidity. Examples of the thermosetting resin include an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, a polyimide resin, a maleimide resin, and a phenol resin. When carbon fibers are used as the reinforcing fibers, epoxy resins and vinyl ester resins are preferably used in terms of adhesiveness with the carbon fibers.
[0013]
Examples of the reinforcing fiber include carbon fiber, glass fiber, aramid fiber, boron fiber, silicon carbide fiber, high-strength polyethylene, PBO fiber, and stainless steel fiber. Among them, carbon fiber is used in terms of weight reduction and rigidity. Preferably used.
In addition, examples of the reinforcing fiber include long fibers and short fibers. Among them, long fibers are preferably used in terms of rigidity.
[0014]
Examples of the form of the long fiber include those arranged in one direction and woven fabric made of long fibers. Particularly, in terms of excellent rigidity, when the vertical direction of the door 20 is 0 °, the long fibers aligned in one direction are laminated so that the long fibers are oriented at 0 ° and 90 °, or A form in which fabrics made of fibers are laminated is preferable.
[0015]
The surface material 21 is plate-shaped. Examples of the material constituting the surface material 21 include a fiber reinforced composite material, a conventional metal material, and the like, and among them, a fiber reinforced composite material is preferable in terms of both weight reduction and rigidity.
What was illustrated as a material of the core material 22 is employable as a fiber reinforced composite material.
[0016]
A reinforcing rib 26 extending in the vertical direction of the door 20 is integrally provided on one side of the surface material 21 and connected to the other surface material 21 facing the surface material 21 and the core material 22. ing.
For example, as shown in FIG. 5, a locking member 28 for attaching a cushion rubber 27 provided on a side portion where the doors 20 abut each other is provided on both sides of the door 20. An internal space 29 for providing a component (not shown) to be connected is necessary. When such an internal space 29 is provided in the door 20, the crushing rigidity of the door 20 in the internal space 29 tends to be insufficient. Therefore, reinforcing ribs 26 that are integrally formed with the surface material 21 on one side and connect the surface materials 21 and 21 on both sides are provided in the vicinity of the side edge of the door 20 so as to partition the internal space 29 and the core material 22. It has been.
[0017]
As the material of the reinforcing rib 26, when the surface material 21 is made of a fiber reinforced composite material, a fiber reinforced composite material is similarly used. Specifically, the reinforcing rib 26 is obtained by curing a sheet molding compound (SMC) made of short fibers and a thermosetting resin. As the short fiber and the thermosetting resin, for example, the above-described reinforcing fiber and thermosetting resin can be used.
[0018]
The rubber packing 23 has a ring shape corresponding to the shape of the window, and has a substantially H-shaped cross section in which grooves along the circumferential direction are formed on the outer peripheral surface and the inner peripheral surface. As shown in FIG. 3, the two surface materials 21 and 21 are squeezed so as to be bonded to each other at the peripheral portion 30 on the window side, and are bonded with an adhesive 31 at the peripheral portion 30. In the groove on the outer peripheral surface of the rubber packing 23, the peripheral portion 30 on the window side of the two surface materials 21, 21 is fitted. Further, the peripheral edge of the window glass 24 is fitted in the groove on the inner peripheral surface of the rubber packing 23.
[0019]
Next, an example of a method for manufacturing the door 20 will be described.
First, a prepreg in which a long fiber is impregnated with a thermosetting resin is disposed on the lower mold surface of a core mold composed of an upper mold and a lower mold.
Next, the mold is closed, and the prepreg is pressed while being heated by the lower mold and the upper mold. After compression molding, the mold is opened to obtain a core material 22 in which a plurality of recesses 25 extending in the vertical direction of the door 20 are formed as shown in FIG.
[0020]
Similarly, SMC is filled in the lower mold groove of the surface material mold, which is composed of the upper mold and the lower mold, and the groove corresponding to the reinforcing rib is formed in the lower mold, and further, on the lower mold surface. A prepreg in which a long fiber is impregnated with a thermosetting resin is disposed.
Next, the mold is closed, and the SMC and the prepreg are pressed while being heated by the lower mold and the upper mold. After compression molding, the mold is opened to obtain a surface material 21 in which reinforcing ribs 26 extending in the vertical direction of the door 20 are integrally formed on one side.
[0021]
Next, an adhesive is applied to both surfaces of the core material 22. An adhesive is also applied to the window-side peripheral portion of the surface material 21 and the bonding surface of the reinforcing rib 26. After the core material 22 is sandwiched between the surface materials 21, 21, the surface materials 21, 21 are bonded to both surfaces of the core material 22 with the cured adhesive 31 by pressurizing and heating them. The door 20 is obtained by bonding the peripheral portions on the window side of 21 and the reinforcing rib 26 and the other surface layer material 21 with an adhesive 31.
[0022]
As the adhesive, for example, a two-component epoxy resin adhesive, a two-component urethane adhesive, rubber reinforced methyl methacrylate, or the like can be used.
As the prepreg, there can be used a unidirectional prepreg obtained by impregnating a thermosetting resin into long fibers aligned in one direction, a fabric prepreg obtained by impregnating a thermosetting resin into a woven fabric of long fibers, and the like.
[0023]
When disposing the prepreg on the lower mold surface, it is preferable to stack a plurality of prepregs. When laminating a plurality of unidirectional prepregs, it is preferable to laminate the unidirectional prepregs while shifting the direction of the long fibers so that the long fibers are oriented in the vertical direction and the horizontal direction of the door 20. Further, a unidirectional prepreg and a fabric prepreg may be laminated.
[0024]
Since the door 20 described above is made of a fiber-reinforced composite material, it can be reduced in weight compared to a conventional metal door. In addition, since a plurality of concave strips 25 are formed in the core material 22, even if a fiber reinforced composite material is used and the weight is reduced as compared with the conventional one, bending rigidity, crushing rigidity, etc. required for the door are required. The rigidity of can be fully demonstrated.
[0025]
Further, since the reinforcing ribs 26 for connecting the surface materials 21 and 21 on both surfaces are provided on the surface material 21, the crushing rigidity of both side portions of the door 20 is further improved. In addition, since the reinforcing rib 26 is integrally formed on one side of the surface material 21, it is not necessary to separately bond the reinforcing rib as a separate member to the surface material 21 when the door 20 is manufactured. The door 20 can be easily manufactured (assembled).
Further, since the core material 22 can be formed by compression molding, it is easier to manufacture than the conventional metal honeycomb core.
[0026]
The door of the present invention is not limited to the door 20 in the illustrated example, and has a surface material provided on both surfaces and a core material sandwiched between them, and the core material is made of a fiber-reinforced composite material. What is necessary is just a plate-shaped thing and having a several groove | channel or a protruding item | line.
Therefore, it is not always necessary to provide the reinforcing rib 26 in the door of the present invention.
Further, at least the core material may be a fiber reinforced composite material, and the surface material may be a fiber reinforced composite material or a metal. However, from the viewpoint of reducing the weight of the door, the surface material is preferably a fiber-reinforced composite material.
[0027]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. In addition, this invention is not restrict | limited by an Example.
In this example, TR390E250S (thermosetting resin: epoxy resin, long fiber: carbon fiber) manufactured by Mitsubishi Rayon Co., Ltd. was used as the unidirectional prepreg. Also, TR3110G390 (thermosetting resin: epoxy resin, long fiber: carbon fiber) manufactured by Mitsubishi Rayon Co., Ltd. was used as the fabric prepreg. As SMC, AMC8590 (thermosetting resin: vinyl ester resin, short fiber: carbon fiber) manufactured by Quantum Co., Ltd. was used.
[0028]
First, eight layers of the fabric prepreg were laminated on the surface of the lower mold for the core material. Next, the mold was closed, and the prepreg was pressed with a lower mold and an upper mold at a pressure of 80 kg / cm 2 for 5 minutes while being heated at 140 ° C., and the prepreg was integrally cured. After compression molding, the mold was opened, and a 1.6 mm thick core material having the shape shown in FIG. 4 was obtained.
[0029]
Separately, after filling SMC with the groove corresponding to the reinforcing rib of the lower mold for the surface material, the unidirectional prepreg is placed on the surface of the lower mold for the surface material, and the orientation of the long fibers is the vertical direction of the door Nine layers are stacked so that [0 ° / 0 ° / 90 ° / 0 ° / 0 ° / 0 ° / 90 ° / 0 ° / 0 °] is set to 0 °, and one fabric prepreg is placed thereon. did. Next, the mold was closed, and the SMC and the prepreg were pressed with a lower mold and an upper mold at a pressure of 80 kg / cm 2 for 5 minutes while being heated at 140 ° C., and the SMC and the prepreg were integrally cured. After compression molding, the mold was opened to obtain a surface material having a thickness of 2.5 mm and having reinforcing ribs on one side.
[0030]
A two-pack type epoxy resin adhesive in which a main agent (manufactured by Ciba-Gaigi, Araldite AW106) and a curing agent (manufactured by Ciba-Gigi, Hardener HV953U) were mixed at a mass ratio of 100: 60 was applied to both surfaces of the obtained core material. Also, the same adhesive was applied to the peripheral portion of the surface material on the window side and the adhesive surface of the reinforcing rib. Then, after sandwiching the core material between the two surface materials, curing was performed at 70 ° C. for 50 minutes, and the surface material was adhered to both surfaces of the core material with an adhesive to obtain a door.
This door has the same level of rigidity as a conventional stainless steel door, and is approximately 30% lighter than an aluminum door.
[0031]
【The invention's effect】
As described above, the door of the present invention includes a surface material provided on both surfaces and a plate-shaped core material having a plurality of concave or convex strips made of a fiber-reinforced composite material sandwiched between the surface materials. Since it comprises, it can reduce in weight, maintaining sufficient rigidity.
Such a door is suitable as a door for a railway vehicle that is required to be faster and lighter. It can also be applied to aircraft doors and automobile doors that require weight reduction.
[0032]
Further, if the surface material is made of a fiber reinforced composite material, the weight can be further reduced.
Further, if the fiber reinforced composite material is obtained by reinforcing a matrix of a thermosetting resin with long fibers arranged in one direction and / or a woven fabric of long fibers, rigidity such as bending rigidity and crushing rigidity is further increased. improves.
[0033]
Further, if a reinforcing rib that is integrally formed with the surface material on one side and connects the surface materials on both sides is provided in the vicinity of the side edge of the door, the crushing rigidity of the side edge of the door is improved.
In the door manufacturing method of the present invention, a prepreg in which a long fiber is impregnated with a thermosetting resin is compression-molded to produce a plate-shaped core material having a plurality of concave stripes or convex stripes. Since the surface material is bonded to both surfaces, a lightweight door can be easily manufactured while maintaining sufficient rigidity.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a door according to the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
3 is a sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view showing an example of a core material in the present invention.
FIG. 5 is a cross-sectional view showing an example in which a cushion rubber is attached to a side portion of the door.
FIG. 6 is a cross-sectional view showing an example of a conventional door.
[Explanation of symbols]
20 Door 21 Surface material 22 Core material 25 Concave line 26 Reinforcement rib

Claims (3)

以下の1)〜3)の工程を有してなるドアの製造方法。
1)芯材用金型の下型の表面にプリプレグを積層し、芯材用金型を閉じ、加熱加圧してプリプレグ積層体を硬化して、芯材を得る工程
2)表面材用金型の下型の補強リブに対応する溝にシートモールディングコンパウンドを充填し、さらに、プリプレグを積層し、表面材用金型を閉じ、加熱加圧して、シートモールディングコンパウンドとプリプレグ積層体を一体硬化して、表面材を得る工程
3)芯材の両面に表面材を接着する工程
A door manufacturing method comprising the following steps 1) to 3).
1) Step of laminating the prepreg on the surface of the lower mold of the core material mold, closing the core material mold, and curing the prepreg laminate by heating and pressing to obtain the core material 2) Mold for the surface material Fill the groove corresponding to the reinforcing rib of the lower mold with the sheet molding compound, laminate the prepreg, close the mold for the surface material, heat and press, and cure the sheet molding compound and the prepreg laminate integrally. Step of obtaining the surface material 3) Step of bonding the surface material to both surfaces of the core material
両面に設けられた繊維強化複合材料からなる表面材と、これら表面材に挟まれた繊維強化複合材料からなる複数の凹条または凸条を有する板状の芯材とを具備するドアであり、A door comprising a surface material made of a fiber-reinforced composite material provided on both surfaces, and a plate-shaped core material having a plurality of concave or convex strips made of a fiber-reinforced composite material sandwiched between these surface materials,
ドアの側縁近傍に、片側の表面材と一体成形され、かつ両面の表面材を連結する補強リブが設けられていることを特徴とするドア。A door having a reinforcing rib formed integrally with a surface material on one side and connecting the surface materials on both sides, in the vicinity of a side edge of the door.
前記補強リブが、繊維強化複合材料からなるものであることを特徴とする請求項2記載のドア。The door according to claim 2, wherein the reinforcing rib is made of a fiber-reinforced composite material.
JP2003137216A 2003-05-15 2003-05-15 Door and manufacturing method thereof Expired - Fee Related JP4015584B2 (en)

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TWI556937B (en) * 2012-07-18 2016-11-11 三菱麗陽股份有限公司 Fiber reinforced composite material structure and composite material molded body using the structure
DE102013104496A1 (en) * 2013-05-02 2014-11-20 Bombardier Transportation Gmbh Wall element for a vehicle
CN106428067A (en) * 2016-12-02 2017-02-22 中车长春轨道客车股份有限公司 Novel vehicle door frame integrated structure and forming method
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