JP2004174929A - Cylindrical member and its manufacturing method - Google Patents

Cylindrical member and its manufacturing method Download PDF

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Publication number
JP2004174929A
JP2004174929A JP2002344165A JP2002344165A JP2004174929A JP 2004174929 A JP2004174929 A JP 2004174929A JP 2002344165 A JP2002344165 A JP 2002344165A JP 2002344165 A JP2002344165 A JP 2002344165A JP 2004174929 A JP2004174929 A JP 2004174929A
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Prior art keywords
mandrel
peripheral portion
sheet
outer peripheral
fiber layer
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JP2002344165A
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Japanese (ja)
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Toshihiro Gotou
稔裕 後藤
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Toyota Industries Corp
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Toyota Industries Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical member which can be released from a mold without grinding the surface of a mandrel and does not need another preparatory process, and to provide its manufacturing method. <P>SOLUTION: A mold releasing sheet 2 is wound around the outer periphery 3a of the approximately cylindrical mandrel 3, and joints at ends of the sheet 2 are fixed by a tape or the like, thereby covering the outer periphery 3a of the mandrel 3 with the mold releasing sheet 2. A resin-impregnated fiber is further wound around the outer periphery of the sheet 2 covering the outer periphery 3a of the mandrel 3 while rotating the mandrel 3, forming a cylindrical fiber layer. After the resin of the fiber layer is hardened by heating the mandrel 3 in a heating furnace, the fiber layer is released from the mandrel 3 while sliding it. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、筒部材及びその製造方法に関する。
【０００２】
【従来の技術】
従来より、自動車等において動力を伝達するＦＲＰプロペラシャフトは、筒状のプロペラシャフト用チューブを有している（例えば特許文献１参照）。
このようなチューブは、主にフィラメントワインディング法（ＦＷ法）により製作される。フィラメントワインディング法では、心棒となる円柱状のマンドレルを回転させながら、樹脂を含浸させた繊維をマンドレルの外周部に巻き付けて繊維層を形成する。さらに、マンドレルを加熱炉内に入れて繊維層の樹脂を硬化させた後、この繊維層からマンドレルを抜き出す、すなわち脱型することにより円筒状のＦＲＰ（繊維強化プラスチック）製のチューブを得る。
【０００３】
ところで、プロペラシャフト用チューブの脱型には、例えば以下に示される２つの方法が利用されている。第１の方法は、マンドレルの外周部に予め離型剤を塗布すると共にその上に繊維層を形成することによりマンドレル外周部への繊維層の樹脂の貼り付きを防止し、チューブからマンドレルを滑らせながら脱型する方法である。また、第２の方法は、金属製のマンドレルを予め加熱してこのマンドレルの外周部に繊維層を形成し、さらに加熱炉内で樹脂を硬化させた後、冷却時のマンドレルの熱収縮を利用してチューブからマンドレルを滑らせながら脱型する方法である。
【０００４】
【特許文献１】
実用新案登録第２６０１０６７号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、上述した第１の方法では、マンドレルの外周部に離型剤を塗布しているにもかかわらず、チューブからマンドレルを抜き出す際に、チューブを構成している繊維層に含まれる炭素繊維がマンドレルの外周部表面を削ることがある。その場合、マンドレルの外周部表面に傷が付いたり、マンドレル外周部の径が部分的に細くなり、その補修が必要となってしまう。
また、第２の方法では、予めマンドレルを加熱する等の別工程が必要であり、その分、プロペラシャフト全体の製造作業が煩雑になってしまう。
【０００６】
この発明はこのような問題点を解消するためになされたもので、マンドレルの表面を削ることなく脱型可能で且つ事前の別工程を必要としない、筒部材及びその製造方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
この発明に係る筒部材の製造方法は、マンドレルの外周部を、このマンドレルの外周部との間に離型効果を有するように固体のシート部材により覆い、マンドレルの外周部を覆っているシート部材の外周部に樹脂を含浸した繊維を巻き付けて繊維層を形成し、繊維層が形成されたマンドレルを加熱してその樹脂を硬化させ、樹脂が硬化した繊維層からマンドレルを脱型することにより筒部材を製造する方法である。
このような方法により、マンドレルの外周部と繊維層との間に配置されたシート部材によりマンドレルの外周部と繊維層とが直に接触しないため、脱型の際に繊維層がマンドレルの外周部表面を削ることが防止される。また、固体のシート部材を使用することにより、脱型のためにマンドレルを事前に加熱する等の別工程が必要なくなり、これによりプロペラシャフト全体の製造作業が容易になった。
【０００８】
シート部材は離型剤を含浸した離型シートであり、この離型シートをマンドレルの外周部に巻き付けてマンドレルの外周部を覆うことができる。このような方法により、マンドレルの外周部を離型シートにより一度に覆うことが可能である。
また、マンドレルの外周部に離型剤を塗付し、離型剤が塗付されたマンドレルの外周部を固体のシート部材で覆うことができる。この場合、マンドレルの外周部に塗付される離型剤として、既存の離型剤を利用することが可能である。
また、シート部材は離型剤を含浸した帯状の離型シートであり、この離型シートをマンドレルの外周部に螺旋状に巻き付けてマンドレルの外周部を覆うこともできる。この場合、マンドレルの大きさに応じて離型シートをカットして利用する必要がないため、マンドレル外周部の被覆作業を容易に行えるだけでなく、その汎用性が高い。
さらに、シート部材として離型剤を含浸し且つ筒形状を有する離型シートをマンドレルの外周部に被せてマンドレルの外周部を覆うこともできる。この場合、離型シートの端部の合わせ目がないため、離型シート端部で重なり部が生じず、これにより段差のない均一な厚みの離型シートでマンドレルの外周部を覆うことが可能である。
【０００９】
また、この発明に係る筒部材は樹脂を含浸した繊維から筒状に形成された繊維層と、繊維層の内面を覆うと共に少なくとも繊維層に接する面とは反対側の面に離型効果を有する固体のシート部材とを備えるものである。
このような構成とすることにより、マンドレルの表面を削ることなく脱型可能で且つ事前の別工程を必要とせずに製造することができる筒部材を実現できるだけでなく、繊維層の内面が固体のシート部材により覆われているため、繊維層の内部に水分が侵入するのを防止することができる。また、シート部材は離型効果だけでなく、筒部材の制振材としての効果も有する。
【００１０】
【発明の実施の形態】
以下、この発明の実施の形態を添付図面に基づいて説明する。
図１に、この発明の実施の形態に係る筒部材を適用したプロペラシャフト用チューブの断面図を示す。このチューブは、樹脂を含浸した繊維によりほぼ円筒状に形成された繊維層１とこの繊維層１の内面を覆う固体のシート部材である離型シート２とからなっており、繊維層１の樹脂は後述するように加熱により硬化されている。また、離型シート２は、薄紙等からなるシートにシリコン等からなる離型剤を含浸させて形成されたものであり、ここではその一例であるシリコン処理ペーパーを使用している。
【００１１】
次に、上述のようなプロペラシャフト用チューブの製造方法を説明する。図２に示されるように、フィラメントワインディングの心棒として利用されるほぼ円柱状のマンドレル３の外周部３ａに、予め所望の大きさにカットされた離型シート２を巻き付ける。そして、マンドレル３の外周部３ａに沿ってほぼ円筒状になった離型シート２の端部の合わせ目をテープ等で固定することにより、マンドレル３の外周部３ａが離型シート２で覆われる。なお、離型シート２は予めマンドレル３の直径及び長手方向の長さに合わせて所望の大きさにカットされており、一枚の離型シートを用いても、複数枚の離型シートをテープ等により継ぎ合わせて用いてもよい。
【００１２】
さらに、マンドレル３を回転させながらマンドレル３の外周部３ａを覆っている離型シート２の外周部に樹脂を含浸した繊維を巻き付けて円筒状の繊維層を形成する。そして、繊維層を形成されたマンドレル３を加熱炉内で加熱して繊維層の樹脂を硬化させ、その後、マンドレル３から繊維層を滑らせながら脱型する。このとき、繊維層の内面を覆っている離型シート２に含浸された離型剤が離型シート２とマンドレル３の外周部３ａとの間に離型効果を発揮し、これによりマンドレル３を繊維層に対して容易に脱型することができる。また、離型シート２は繊維層に伴ってマンドレル３の外周部３ａから外れる。その結果、図１に示されるように、繊維層１とその内面を覆う離型シート２とからなる円筒状のプロペラシャフト用チューブが製造される。
【００１３】
このように本実施の形態では、マンドレル３の外周部３ａと繊維層１との間に配置された離型シート２によりマンドレル３の外周部３ａと繊維層１とが直に接触しないため、脱型の際に繊維層１に含まれる炭素繊維がマンドレル３の外周部３ａ表面を削ることが防止される。従って、マンドレル３の外周部３ａ表面に傷が付いたり、マンドレル３の外周部３ａの径が部分的に細くなったりすることがなく、その結果、脱型後にマンドレル３の外周部３ａ表面を再メッキする等の補修を行ったりマンドレル３外周部３ａの径をメンテナンスする必要がなくなって、補修費用やメンテナンスの手間がかかることがない。
【００１４】
また、離型シート２を使用することにより、従来のように脱型のためにマンドレルを事前に加熱する等の別工程が必要なくなり、これによりプロペラシャフト全体の製造作業が容易になった。
また、本実施の形態では、離型剤を含浸させた離型シート２を使用するため、マンドレル３の外周部３ａに所定の膜厚で均一に離型剤を塗付する必要がなく、製造作業が容易である。
【００１５】
また、脱型時に離型シート２は繊維層１と共にマンドレル３の外周部３ａから外れて、離型シート２に含浸された離型剤がマンドレル３の外周部３ａに付着しないため、これにより脱型後にマンドレル３を洗浄して離型剤を洗い流す必要がなく、また、その洗浄に使用した洗浄液を排水処理する必要もなくなる。
また、マンドレル３の外周部３ａを離型シート２で覆ってその上に繊維層１を形成するため、繊維層１を形成する領域よりも外側まで離型シート２があると、すなわち離型シート２がマンドレル３の外周部３ａ全体を覆うと共にマンドレル３の両端部から少しはみ出すように覆うと、マンドレル３の外周部３ａやその端部に繊維層１を構成する繊維に含浸された樹脂が垂れ落ちて付着することを防止することができる。従って、マンドレル３に垂れ落ちた樹脂を剥がす等の手間がかからなくなると共にマンドレル３に樹脂が付着していないかをメンテナンスする必要がなくなる。
【００１６】
また、プロペラシャフト用チューブの繊維層１の内面は、薄紙等からなるシートにシリコンからなる離型剤を含浸させた離型シート２により覆われているため、この離型シート２により繊維層１の内部に水分が侵入するのを防止することができ、その結果、チューブに接続される金属ヨーク等の金属製部材に錆等が発生するのを防止することができる。さらに、離型シート２は離型効果だけでなく、プロペラシャフト用チューブの制振材としての効果も有しており、製造されたプロペラシャフト用チューブの内面を覆っている離型シート２の内部に、厚紙を筒状に巻いて挿入すれば、制振効果をより向上させることができる。また、薄紙等からなるシートに離型剤を含浸させた離型シート２の代わりに、制振効果の高い厚紙からなるシートに離型剤を含浸させた離型シートを使用することができる。
【００１７】
なお、上述の実施の形態では、離型剤を含浸した離型シート２をマンドレル３の外周部３ａに巻き付けてマンドレル３の外周部３ａを覆っていたが、この代わりに、離型剤を含浸した帯状の離型シートをマンドレル３の外周部３ａに螺旋状に巻き付けてマンドレル３の外周部３ａを覆ってもよい。或いは、離型剤を含浸し且つ筒形状を有する離型シートをマンドレル３の外周部３ａに被せてマンドレル３の外周部３ａを覆ってもよい。或いは、ビニルやポリエチレン等からなる化学合成樹脂シートの片面又は両面にシリコン等からなる離型剤を塗付したものをマンドレル３の外周部３ａに巻き付けてマンドレル３の外周部３ａを覆ってもよい。或いは、マンドレル３の外周部３ａに離型剤を塗付し、離型剤が塗付されたマンドレル３の外周部３ａを、離型剤が塗布又は含浸されていない薄紙等からなる固体のシート部材で覆ってもよい。むろん、離型剤が塗付されたマンドレル３の外周部３ａを、離型剤が塗付又は含浸された薄紙等からなる固体のシート部材で覆ってもよい。
【００１８】
ここで、離型剤を含浸し且つ筒形状を有する離型シートをマンドレル３の外周部３ａに被せてマンドレル３の外周部３ａを覆う場合には、離型シートの端部の合わせ目がないため、離型シート端部で重なり部が生じず、これにより段差のない均一な厚みの離型シートでマンドレル３の外周部３ａを覆うことができる。
また、マンドレル３の外周部３ａに離型剤を塗布してその上から離型剤が塗付されていない固体のシート部材で覆う場合には、マンドレル３の外周部３ａに塗付される離型剤として、既存の離型剤を利用することが可能である。また、加熱炉内で繊維層１の樹脂が硬化する際にマンドレル３の外周部３ａに塗布された離型剤がシート部材の片面に転写され、脱型の際に離型剤がその片面に付着した状態でシート部材が繊維層１と共にマンドレル３から外れるようになっている。
さらに、離型剤を含浸した帯状の離型シートをマンドレル３の外周部３ａに螺旋状に巻き付けてマンドレル３の外周部３ａを覆う場合には、離型シートをマンドレル３の直径及び長手方向の長さに合わせて所望の大きさにカットして利用する必要がないため、マンドレル３の外周部３ａを覆う作業が容易に行えるだけでなく、その汎用性が高い。
【００１９】
また、シートに離型剤を含浸させて形成した離型シート２の代わりに、シートの片面又は両面に離型剤が塗付された離型シートを用いることもできる。また、その片面又は両面に離型剤が塗付された帯状の離型シートや、その片面又は両面に離型剤が塗付され且つ筒形状を有する離型シートも用いることができる。
また、離型シート２の代わりに化学合成樹脂シートのみを利用しても上述の実施の形態と同様の効果を得ることができる。
【００２０】
【発明の効果】
以上説明したように、この発明によれば、マンドレルの外周部を、このマンドレルの外周部との間に離型効果を有するように固体のシート部材により覆い、マンドレルの外周部を覆っているシート部材の外周部に樹脂を含浸した繊維を巻き付けて繊維層を形成し、繊維層が形成されたマンドレルを加熱してその樹脂を硬化させ、樹脂が硬化した繊維層からマンドレルを脱型したので、マンドレルの表面を削ることなくマンドレルから筒部材を脱型することが可能で且つ事前の別工程を必要としない筒部材を実現することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態に係る筒部材を示す断面図である。
【図２】実施の形態におけるマンドレルへの離型シートの巻き付けの様子を示す斜視図である。
【符号の説明】
１ 繊維層、２ 離型シート、３ マンドレル、３ａ マンドレルの外周部。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tubular member and a method for manufacturing the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an FRP propeller shaft that transmits power in an automobile or the like has a tubular propeller shaft tube (for example, see Patent Document 1).
Such a tube is mainly manufactured by a filament winding method (FW method). In the filament winding method, a fiber impregnated with a resin is wound around the outer periphery of the mandrel to form a fiber layer while rotating a cylindrical mandrel serving as a mandrel. Further, the mandrel is placed in a heating furnace to cure the resin of the fiber layer, and then the mandrel is extracted from the fiber layer, that is, demolded to obtain a cylindrical FRP (fiber reinforced plastic) tube.
[0003]
By the way, the following two methods are used for removing the propeller shaft tube, for example. The first method is to apply a release agent in advance to the outer periphery of the mandrel and form a fiber layer thereon, thereby preventing the resin of the fiber layer from sticking to the outer periphery of the mandrel and sliding the mandrel from the tube. It is a method of demolding while making it. In the second method, a metal mandrel is preliminarily heated to form a fiber layer on the outer periphery of the mandrel, and after the resin is cured in a heating furnace, the heat shrinkage of the mandrel during cooling is used. And remove the mold while sliding the mandrel from the tube.
[0004]
[Patent Document 1]
Japanese Utility Model Registration No. 2601067
[Problems to be solved by the invention]
However, in the above-described first method, when the mandrel is extracted from the tube, the carbon fibers contained in the fiber layer constituting the tube are removed even though the release agent is applied to the outer peripheral portion of the mandrel. The outer surface of the mandrel may be shaved. In that case, the surface of the outer peripheral portion of the mandrel is damaged, or the diameter of the outer peripheral portion of the mandrel is partially reduced, so that repair is required.
Further, in the second method, another step such as heating the mandrel in advance is required, and the manufacturing operation of the entire propeller shaft becomes complicated accordingly.
[0006]
The present invention has been made to solve such a problem, and it is an object of the present invention to provide a cylindrical member and a method for manufacturing the same, which can be removed without shaving the surface of the mandrel and do not require a separate step in advance. Aim.
[0007]
[Means for Solving the Problems]
In the method for manufacturing a tubular member according to the present invention, the sheet member covering an outer peripheral portion of the mandrel with a solid sheet member so as to have a releasing effect between the outer peripheral portion of the mandrel and the outer peripheral portion of the mandrel. A fiber layer is formed by winding fibers impregnated with a resin around the outer periphery of the tube, heating the mandrel on which the fiber layer is formed, curing the resin, and removing the mandrel from the resin-cured fiber layer. This is a method for manufacturing a member.
According to such a method, since the outer peripheral portion of the mandrel and the fiber layer do not directly contact with each other due to the sheet member disposed between the outer peripheral portion of the mandrel and the fiber layer, the outer peripheral portion of the mandrel is removed when the mold is released. Shaving of the surface is prevented. Further, the use of the solid sheet member eliminates the need for a separate step such as preheating the mandrel for demolding, thereby facilitating the manufacturing operation of the entire propeller shaft.
[0008]
The sheet member is a release sheet impregnated with a release agent, and the release sheet can be wound around the outer periphery of the mandrel to cover the outer periphery of the mandrel. By such a method, the outer peripheral portion of the mandrel can be covered with the release sheet at one time.
Further, a release agent is applied to the outer peripheral portion of the mandrel, and the outer peripheral portion of the mandrel to which the release agent has been applied can be covered with a solid sheet member. In this case, an existing release agent can be used as the release agent applied to the outer peripheral portion of the mandrel.
Further, the sheet member is a strip-shaped release sheet impregnated with a release agent, and the release sheet may be spirally wound around the outer periphery of the mandrel to cover the outer periphery of the mandrel. In this case, since it is not necessary to cut and use the release sheet according to the size of the mandrel, not only can the outer peripheral portion of the mandrel be easily covered, but also its versatility is high.
Further, the outer peripheral portion of the mandrel can be covered by covering the outer peripheral portion of the mandrel with a release sheet impregnated with a release agent and having a cylindrical shape as a sheet member. In this case, since there is no seam at the end of the release sheet, there is no overlap at the end of the release sheet, so that the outer periphery of the mandrel can be covered with a release sheet having a uniform thickness without any steps. It is.
[0009]
Further, the tubular member according to the present invention has a mold releasing effect on a fiber layer formed into a tubular shape from fibers impregnated with a resin, and on a surface opposite to at least a surface that covers the inner surface of the fiber layer and at least contacts the fiber layer. And a solid sheet member.
By adopting such a configuration, not only a cylindrical member that can be removed without shaving the surface of the mandrel and can be manufactured without the need for a separate step in advance is realized, and the inner surface of the fiber layer is solid. Since it is covered with the sheet member, it is possible to prevent moisture from entering the inside of the fiber layer. Further, the sheet member has not only the releasing effect but also an effect as a vibration damping material for the cylindrical member.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a sectional view of a tube for a propeller shaft to which a tubular member according to an embodiment of the present invention is applied. This tube comprises a fiber layer 1 formed in a substantially cylindrical shape by fibers impregnated with a resin, and a release sheet 2 which is a solid sheet member covering the inner surface of the fiber layer 1. Is cured by heating as described later. The release sheet 2 is formed by impregnating a release agent made of silicon or the like into a sheet made of thin paper or the like, and here, silicon-treated paper is used as an example.
[0011]
Next, a method for manufacturing the above-described tube for a propeller shaft will be described. As shown in FIG. 2, a release sheet 2 cut into a desired size in advance is wound around an outer peripheral portion 3a of a substantially cylindrical mandrel 3 used as a mandrel for filament winding. Then, the outer peripheral portion 3a of the mandrel 3 is covered with the release sheet 2 by fixing the joint of the end portion of the release sheet 2 having a substantially cylindrical shape along the outer peripheral portion 3a of the mandrel 3 with a tape or the like. . The release sheet 2 is previously cut to a desired size according to the diameter of the mandrel 3 and the length in the longitudinal direction. Even if one release sheet is used, a plurality of release sheets may be taped. And the like.
[0012]
Further, while rotating the mandrel 3, a resin-impregnated fiber is wound around the outer periphery of the release sheet 2 covering the outer periphery 3a of the mandrel 3 to form a cylindrical fiber layer. Then, the mandrel 3 on which the fiber layer is formed is heated in a heating furnace to cure the resin of the fiber layer, and then the mold is released from the mandrel 3 while sliding the fiber layer. At this time, the release agent impregnated in the release sheet 2 covering the inner surface of the fiber layer exerts a release effect between the release sheet 2 and the outer peripheral portion 3 a of the mandrel 3, whereby the mandrel 3 is removed. It can be easily released from the fiber layer. Further, the release sheet 2 comes off the outer peripheral portion 3a of the mandrel 3 with the fiber layer. As a result, as shown in FIG. 1, a cylindrical propeller shaft tube including the fiber layer 1 and the release sheet 2 covering the inner surface thereof is manufactured.
[0013]
As described above, in the present embodiment, since the outer peripheral portion 3a of the mandrel 3 does not directly contact the fiber layer 1 due to the release sheet 2 disposed between the outer peripheral portion 3a of the mandrel 3 and the fiber layer 1, The carbon fibers contained in the fiber layer 1 are prevented from shaving the surface of the outer peripheral portion 3a of the mandrel 3 during molding. Therefore, the surface of the outer peripheral portion 3a of the mandrel 3 is not damaged, and the diameter of the outer peripheral portion 3a of the mandrel 3 does not partially become small. There is no need to perform repairs such as plating or maintain the diameter of the outer peripheral portion 3a of the mandrel 3, so that repair costs and maintenance work are not required.
[0014]
Further, the use of the release sheet 2 eliminates the need for a separate step such as heating the mandrel in advance for demolding as in the related art, thereby facilitating the manufacturing operation of the entire propeller shaft.
Further, in the present embodiment, since the release sheet 2 impregnated with the release agent is used, it is not necessary to apply the release agent uniformly to the outer peripheral portion 3a of the mandrel 3 with a predetermined film thickness. Work is easy.
[0015]
Further, at the time of release, the release sheet 2 comes off the outer peripheral portion 3a of the mandrel 3 together with the fiber layer 1, and the release agent impregnated in the release sheet 2 does not adhere to the outer peripheral portion 3a of the mandrel 3; There is no need to wash the release agent by washing the mandrel 3 after the mold, and it is not necessary to drain the washing liquid used for the washing.
Further, since the outer peripheral portion 3a of the mandrel 3 is covered with the release sheet 2 and the fiber layer 1 is formed thereon, if the release sheet 2 is provided outside the region where the fiber layer 1 is formed, that is, the release sheet When the cover 2 covers the entire outer peripheral portion 3a of the mandrel 3 and slightly protrudes from both ends of the mandrel 3, the resin impregnated in the fibers constituting the fiber layer 1 drips onto the outer peripheral portion 3a of the mandrel 3 and the ends thereof. It can be prevented from dropping and adhering. Therefore, it is not necessary to remove the resin dripping on the mandrel 3 and to maintain the mandrel 3 without resin.
[0016]
The inner surface of the fiber layer 1 of the tube for a propeller shaft is covered with a release sheet 2 in which a sheet of thin paper or the like is impregnated with a release agent made of silicon. It is possible to prevent moisture from entering the inside of the tube, and as a result, it is possible to prevent rust or the like from being generated on a metal member such as a metal yoke connected to the tube. Further, the release sheet 2 has not only the release effect but also an effect as a vibration damping material of the propeller shaft tube, and the inside of the release sheet 2 covering the inner surface of the manufactured propeller shaft tube. If the cardboard is wound into a cylindrical shape and inserted, the vibration damping effect can be further improved. Instead of the release sheet 2 in which a release agent is impregnated in a sheet made of thin paper or the like, a release sheet in which a release agent is impregnated in a sheet made of cardboard having a high damping effect can be used.
[0017]
In the above-described embodiment, the release sheet 2 impregnated with the release agent is wound around the outer peripheral portion 3a of the mandrel 3 to cover the outer peripheral portion 3a of the mandrel 3, but instead of this, the release agent is impregnated with the release agent. The strip-shaped release sheet may be spirally wound around the outer peripheral portion 3 a of the mandrel 3 to cover the outer peripheral portion 3 a of the mandrel 3. Alternatively, the outer peripheral portion 3a of the mandrel 3 may be covered by covering the outer peripheral portion 3a of the mandrel 3 with a release sheet impregnated with a release agent and having a cylindrical shape. Alternatively, a chemically synthesized resin sheet made of vinyl, polyethylene, or the like, coated on one or both sides with a release agent made of silicon or the like, may be wound around the outer peripheral portion 3a of the mandrel 3 to cover the outer peripheral portion 3a of the mandrel 3. . Alternatively, a release agent is applied to the outer peripheral portion 3a of the mandrel 3, and the outer peripheral portion 3a of the mandrel 3 coated with the release agent is coated with a solid sheet made of thin paper or the like not coated or impregnated with the release agent. It may be covered with a member. Of course, the outer peripheral portion 3a of the mandrel 3 to which the release agent is applied may be covered with a solid sheet member made of thin paper or the like to which the release agent is applied or impregnated.
[0018]
Here, when covering the outer peripheral portion 3a of the mandrel 3 by covering the outer peripheral portion 3a of the mandrel 3 with the release sheet impregnated with the release agent and covering the outer peripheral portion 3a of the mandrel 3, there is no seam between the ends of the release sheet. Therefore, no overlap occurs at the end of the release sheet, so that the outer peripheral portion 3a of the mandrel 3 can be covered with the release sheet having a uniform thickness without any step.
When a release agent is applied to the outer peripheral portion 3a of the mandrel 3 and covered with a solid sheet member on which the release agent is not applied, the release agent applied to the outer peripheral portion 3a of the mandrel 3 is applied. It is possible to use an existing mold release agent as the mold release agent. Further, when the resin of the fiber layer 1 is cured in the heating furnace, the release agent applied to the outer peripheral portion 3a of the mandrel 3 is transferred to one surface of the sheet member, and when the mold is released, the release agent is applied to one surface of the sheet member. The sheet member is detached from the mandrel 3 together with the fiber layer 1 in the attached state.
Further, when the strip-shaped release sheet impregnated with the release agent is spirally wound around the outer peripheral portion 3a of the mandrel 3 to cover the outer peripheral portion 3a of the mandrel 3, the release sheet is covered with the diameter and longitudinal direction of the mandrel 3. Since it is not necessary to cut and use the desired size according to the length, not only can the operation of covering the outer peripheral portion 3a of the mandrel 3 be performed easily, but also its versatility is high.
[0019]
Instead of the release sheet 2 formed by impregnating the release agent into the sheet, a release sheet having a release agent applied to one or both surfaces of the sheet may be used. Further, a strip-shaped release sheet having one or both sides coated with a release agent or a release sheet having one or both sides coated with a release agent and having a cylindrical shape can also be used.
Further, even if only a chemically synthesized resin sheet is used instead of the release sheet 2, the same effect as in the above-described embodiment can be obtained.
[0020]
【The invention's effect】
As described above, according to the present invention, the outer peripheral portion of the mandrel is covered with the solid sheet member so as to have a release effect between the outer peripheral portion of the mandrel and the outer peripheral portion of the mandrel. Since a fiber layer was formed by winding fibers impregnated with resin around the outer periphery of the member, the mandrel on which the fiber layer was formed was heated to cure the resin, and the mandrel was removed from the fiber layer where the resin was cured, The tubular member can be removed from the mandrel without shaving the surface of the mandrel, and a tubular member that does not require a separate step in advance can be realized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a tubular member according to an embodiment of the present invention.
FIG. 2 is a perspective view showing how a release sheet is wound around a mandrel in the embodiment.
[Explanation of symbols]
1 fiber layer, 2 release sheet, 3 mandrel, 3a outer periphery of mandrel.

Claims (6)

マンドレルの外周部を、当該マンドレルの外周部との間に離型効果を有するように固体のシート部材により覆い、
マンドレルの外周部を覆っている前記シート部材の外周部に樹脂を含浸した繊維を巻き付けて繊維層を形成し、
前記繊維層が形成されたマンドレルを加熱してその樹脂を硬化させ、
前記樹脂が硬化した繊維層からマンドレルを脱型する
ことを特徴とする筒部材の製造方法。The outer peripheral portion of the mandrel is covered with a solid sheet member so as to have a releasing effect between the outer peripheral portion of the mandrel,
Forming a fiber layer by winding fibers impregnated with resin around the outer periphery of the sheet member covering the outer periphery of the mandrel,
Heating the mandrel on which the fiber layer is formed to cure the resin,
A method for manufacturing a tubular member, comprising removing a mandrel from a fiber layer in which the resin has cured. 前記シート部材は離型剤を含浸した離型シートであり、当該離型シートをマンドレルの外周部に巻き付けてマンドレルの外周部を覆うことを特徴とする請求項１に記載の筒部材の製造方法。2. The method according to claim 1, wherein the sheet member is a release sheet impregnated with a release agent, and the release sheet is wound around an outer peripheral portion of the mandrel to cover the outer peripheral portion of the mandrel. 3. . マンドレルの外周部に離型剤を塗付し、離型剤が塗付されたマンドレルの外周部を固体のシート部材で覆うことを特徴とする請求項１に記載の筒部材の製造方法。The method for manufacturing a tubular member according to claim 1, wherein a release agent is applied to an outer peripheral portion of the mandrel, and the outer peripheral portion of the mandrel to which the release agent is applied is covered with a solid sheet member. 前記シート部材は離型剤を含浸した帯状の離型シートであり、当該離型シートをマンドレルの外周部に螺旋状に巻き付けてマンドレルの外周部を覆うことを特徴とする請求項１に記載の筒部材の製造方法。2. The sheet member according to claim 1, wherein the sheet member is a strip-shaped release sheet impregnated with a release agent, and the release sheet is spirally wound around the outer periphery of the mandrel to cover the outer periphery of the mandrel. A method for manufacturing a tubular member. 前記シート部材は離型剤を含浸し且つ筒形状を有する離型シートであり、当該離型シートをマンドレルの外周部に被せてマンドレルの外周部を覆うことを特徴とする請求項１に記載の筒部材の製造方法。2. The sheet member according to claim 1, wherein the sheet member is a release sheet impregnated with a release agent and having a cylindrical shape, and covers the outer periphery of the mandrel by covering the outer periphery of the mandrel with the release sheet. A method for manufacturing a tubular member. 樹脂を含浸した繊維から筒状に形成された繊維層と、
前記繊維層の内面を覆うと共に少なくとも前記繊維層に接する面とは反対側の面に離型効果を有する固体のシート部材と
を備えることを特徴とする筒部材。A fiber layer formed into a tubular shape from fibers impregnated with a resin,
A cylindrical member having a solid sheet member having a releasing effect on at least a surface opposite to a surface in contact with the fiber layer while covering an inner surface of the fiber layer.
JP2002344165A 2002-11-27 2002-11-27 Cylindrical member and its manufacturing method Withdrawn JP2004174929A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006099671A1 (en) * 2005-03-22 2006-09-28 Quickstep Technologies Pty Ltd Composite tube production
AU2006227545B2 (en) * 2005-03-22 2010-12-02 Quickstep Technologies Pty Ltd Composite tube production
US8580176B2 (en) 2001-01-25 2013-11-12 Quickstep Technology Pty Ltd. Method of producing composite or bonded metal components
US8741092B2 (en) 2000-03-03 2014-06-03 Quickstep Technologies Pty Ltd. Production, forming, bonding, joining and repair systems for composite and metal components
US9592657B1 (en) * 2011-12-16 2017-03-14 Nanette L. Hultgren Compression molding of carbon fiber tubular pole

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8741092B2 (en) 2000-03-03 2014-06-03 Quickstep Technologies Pty Ltd. Production, forming, bonding, joining and repair systems for composite and metal components
US8580176B2 (en) 2001-01-25 2013-11-12 Quickstep Technology Pty Ltd. Method of producing composite or bonded metal components
WO2006099671A1 (en) * 2005-03-22 2006-09-28 Quickstep Technologies Pty Ltd Composite tube production
AU2006227545B2 (en) * 2005-03-22 2010-12-02 Quickstep Technologies Pty Ltd Composite tube production
US8002926B2 (en) 2005-03-22 2011-08-23 Quickstep Technologies Pty Ltd. Composite tube production
KR101274263B1 (en) * 2005-03-22 2013-06-14 퀵스텝 테크놀로지즈 피티와이 리미티드 composite tube production
US9592657B1 (en) * 2011-12-16 2017-03-14 Nanette L. Hultgren Compression molding of carbon fiber tubular pole

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