JPH10217321A - Molding method of composite material - Google Patents
Molding method of composite materialInfo
- Publication number
- JPH10217321A JPH10217321A JP13150693A JP13150693A JPH10217321A JP H10217321 A JPH10217321 A JP H10217321A JP 13150693 A JP13150693 A JP 13150693A JP 13150693 A JP13150693 A JP 13150693A JP H10217321 A JPH10217321 A JP H10217321A
- Authority
- JP
- Japan
- Prior art keywords
- prepreg
- mold
- tubular film
- composite material
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリプレグからなる複
合材料の成型方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a prepreg composite material.
【０００２】[0002]
【従来の技術】従来より、複合材料の成型方法として
は、例えば筒状金型の内周面に沿ってプリプレグを配置
し、その中に従来から知られている耐熱性熱可塑性シー
ムレス状フィルムを挿入し、前記チューブ状フィルムを
加熱膨張せしめ、その内圧によって、前記プリプレグを
前記筒状内周面に接着せしめた複合材料の成型方法が知
られていた。2. Description of the Related Art Conventionally, as a method of molding a composite material, for example, a prepreg is arranged along an inner peripheral surface of a cylindrical mold, and a conventionally known heat-resistant thermoplastic seamless film is placed in the prepreg. There has been known a method of molding a composite material in which a tubular film is inserted and heated and expanded, and the prepreg is adhered to the cylindrical inner peripheral surface by the internal pressure.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、斯る複
合材料の成型方法に用いる従来の耐熱性熱可塑性チュー
ブ状フィルムでは、複合材料の成型温度に耐えるだけの
耐熱性がないために、従来の耐熱性熱可塑性チューブ状
フィルムは加熱膨張し、その内圧によって、プリプレグ
を金型内周面に密着せしめる複合材料の成型方法には適
したものでなかった。本発明者らは、かかる状況に鑑み
鏡意検討を続けた結果本発明に到達した。However, the conventional heat-resistant thermoplastic tubular film used in the method for molding such a composite material does not have heat resistance enough to withstand the molding temperature of the composite material. The thermoplastic thermoplastic tubular film expands by heating and is not suitable for a method of molding a composite material in which the prepreg is brought into close contact with the inner peripheral surface of the mold due to its internal pressure. In view of such a situation, the inventors of the present invention have continued to study the mirror and have arrived at the present invention.
【０００４】[0004]
【課題を解決するための手段】本発明は、金型１内周面
に沿って配置したプリプレグ２中に耐熱性熱可塑性樹脂
からなるチューブ状フィルム３を挿入し、前記チューブ
状フィルムを加熱膨張せしめ、その内圧によって前記プ
リプレグを前記筒状内周面に密着せしめた複合材料の成
型方法に関する。According to the present invention, a tubular film 3 made of a heat-resistant thermoplastic resin is inserted into a prepreg 2 arranged along the inner peripheral surface of a mold 1, and the tubular film is expanded by heating. At least, the present invention relates to a method of molding a composite material in which the prepreg is brought into close contact with the cylindrical inner peripheral surface by its internal pressure.
【０００５】本発明に係るプリプレグとは、高度な性能
を持った部品等を作るための中間形態材料の１つであ
り、種々の高機能強度繊維に高性能樹脂を含浸させたプ
ラスチック系複合中間材料である。ここで、高機能強化
繊維としては、カーボン系ファイバー（Ｃ・Ｆ）、ボロ
ン系繊維（Ｂ．Ｆ）、アルミナ繊維、炭化けい素繊維、
酸化けい素繊維、Ｓガラス等の無機系繊維、スチール、
タングステン等のメタル・ファイバー、芳香族ポリアミ
ド系繊維（例えばデュポン社発明のｋｅｖｌａｒ（Ｋ
Ｆ））等の有機系繊維等を例示できる。又、高性能樹脂
としては、不飽和ポリエステル系樹脂、エポキシ系樹
脂、フェノール系樹脂、熱硬化性ポリイミド系樹脂等の
熱硬化性樹脂や熱可塑性ポリイミド系樹脂、ポリアミド
系樹脂、ポリカーボネート系樹脂、ポリエステル系樹
脂、スチレン系樹脂、フッ素系樹脂等の耐熱性熱可塑性
樹脂やＰＥＥＫ（ポリエーテル・エテン・ケトノ）樹脂
等も例示できる 更に、プリプレグの形態としては、前記の高機能強化繊
維からなるフィラメント、ヤーン、織布、編組品、フェ
ルト、不織布等に前記の高機能樹脂を適宜の方法で含浸
せしめ、例えばロール状にまいたもの、またはシート状
にカットしたもの等が一般的であるが特に制限されな
い。[0005] The prepreg according to the present invention is one of intermediate materials for producing high performance parts and the like, and is a plastic composite intermediate made by impregnating various high-performance fibers with a high-performance resin. Material. Here, as the high-performance reinforcing fibers, carbon-based fibers (CF), boron-based fibers (BF), alumina fibers, silicon carbide fibers,
Silicon oxide fiber, inorganic fiber such as S glass, steel,
Metal fibers such as tungsten, and aromatic polyamide fibers (for example, kevlar (K
And organic fibers such as F)). As high-performance resins, unsaturated polyester resins, epoxy resins, phenolic resins, thermosetting resins such as thermosetting polyimide resins and thermoplastic polyimide resins, polyamide resins, polycarbonate resins, polyester resins Resins, styrene resins, heat-resistant thermoplastic resins such as fluororesins, PEEK (polyether ethene / ketono) resins, etc. Further, as a form of the prepreg, a filament made of the above-mentioned high-performance reinforcing fiber, Yarns, woven fabrics, braided products, felts, non-woven fabrics, etc. are impregnated with the above-mentioned high-performance resin by an appropriate method, for example, those in a roll form or those cut in a sheet form are generally used, but are particularly limited. Not done.
【０００６】本発明に係る耐熱性熱可塑性樹脂として
は、特に制限はなく、複合材料の成型の際に加熱膨張さ
れて、その内圧によってプリプレグを金型内周面に密着
せしめることが可能なものを例示でき、更に耐熱性、耐
圧性を有したチューブ状フィルムを成膜できるものであ
ればよく、例えばポリカーボネート、ポリサルフォン、
熱可塑性ポリイミド系重合体、フッ素系重合体等を例示
できる。特に好ましいものとしては熱可塑性ポリイミド
系樹脂、フッ素系樹脂を例示できる。[0006] The heat-resistant thermoplastic resin according to the present invention is not particularly limited, and is capable of being heated and expanded at the time of molding a composite material so that the prepreg can be brought into close contact with the inner peripheral surface of the mold by its internal pressure. Can be exemplified, furthermore, any heat-resistant, pressure-resistant tubular film can be formed, for example, polycarbonate, polysulfone,
Examples thereof include a thermoplastic polyimide polymer and a fluorine polymer. Particularly preferred are thermoplastic polyimide resins and fluorine resins.
【０００７】前記した熱可塑性ポリイミド系樹脂として
は、押出成形できるものであれば、特に制限はなく、具
体的には高化式フローテスター（ダイ１．０×０．１ｍ
ｍ、予熱時間５ｍｉｎ）を用いて、融点付近の３８０〜
４００℃で測定した溶融粘度が１０００〜９０００ポイ
ズのものが好ましいものとして例示できるが、この範囲
以外のものでも使用可能な場合もあり、特に上記範囲の
みに限定されない。更に、フッ素系樹脂としては、特に
制限はないが、テトラフロロエチレン（ＰＴＦＥ）、テ
トラフロロエチレン・パーフロロアルキル共重合体（Ｐ
ＦＡ）、ポリテトラフロロエチレンヘキサフロロプロピ
レン共重合体（ＦＥＰ）、エチレンテトラフロロエチレ
ン共重合体（ＥＴＦＥ）、ポリフッ化ビニリデン（ＰＶ
ＤＦ）、ポリフッ化ビニル（ＰＶＦ）、トリフロロモノ
クロルエチレン共重合体（ＰＣＴＦＥ）等が例示できろ
が、複合材料の成型の際に、加熱膨張して、その内圧に
よってプリプレグを金型内周面に密着せしめるものであ
ればよい。特に好ましいものとしては耐熱性や伸度が優
れ膨張が容易な、例えばテトラフロロエチレン・パーフ
ロロアルキル共重合体（ＰＦＡ）、エチレンテトラフロ
ロエチレン共重合体（ＥＴＦＥ）を例示できる。この
際、前記の耐熱性熱可塑性樹脂により高度な耐熱性、耐
圧性、熱伝導性等の機能を付与するために、フィラーや
樹脂を分散させてもよい。掛かるフィラーとしてはタル
ク、マイカ、チタン酸ウィスカー、ボロンナイトレー
ト、アルミナ、カーボン等を例示できる。樹脂として
は、液晶ポリマー、ポリイミド、ポリアミドイミド等を
例示できる。The thermoplastic polyimide resin is not particularly limited as long as it can be extruded, and specifically, is a Koka type flow tester (die 1.0 × 0.1 m).
m, preheating time 5 min) to obtain a temperature of 380 to 380 around the melting point.
Although those having a melt viscosity of 1000 to 9000 poises measured at 400 ° C. can be exemplified as preferable ones, those having a melt viscosity outside this range may be used, and the present invention is not particularly limited to the above range. Further, although there is no particular limitation on the fluororesin, tetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl copolymer (P
FA), polytetrafluoroethylene hexafluoropropylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PV
DF), polyvinyl fluoride (PVF), trifluoromonochloroethylene copolymer (PCTFE), and the like. However, when a composite material is molded, it expands by heating, and the prepreg is pressed against the inner peripheral surface of the mold by the internal pressure. Any material can be used as long as it can be closely adhered to. Particularly preferred are, for example, tetrafluoroethylene / perfluoroalkyl copolymer (PFA) and ethylene tetrafluoroethylene copolymer (ETFE) which have excellent heat resistance and elongation and are easy to expand. At this time, a filler or a resin may be dispersed in order to impart functions such as high heat resistance, pressure resistance, and heat conductivity to the heat-resistant thermoplastic resin. Examples of the filler to be applied include talc, mica, whisker titanate, boron nitrate, alumina, and carbon. Examples of the resin include a liquid crystal polymer, polyimide, and polyamide imide.
【０００８】前記に記載した耐熱性熱可塑性樹脂（例え
ば熱可塑性ポリイミド系樹脂、フッソ系樹脂）を用いて
チューブ状フィルムを成膜するには特に制限はなく、適
宜の成膜方法で成膜すればよい。例えば環状ダイスを付
けた押出機で溶融押出する方法が望ましいが、これのみ
に制限されず、シームレスのチューブ状フィルムが成膜
できる方法（例えば、ラム押出法、遠心成形法）であれ
ばよく、特に制限はない。更に、Ｔダイスを付けた押出
機等でフラット状フィルムを成膜して、必要寸法にカッ
トして、その両側面同志をシールしたチューブ状フィル
ムでも用途によっては使用可能な場合もあり、成膜方法
やチューブの形状については特に制限はない。There is no particular limitation on forming a tubular film using the above-mentioned heat-resistant thermoplastic resin (for example, a thermoplastic polyimide resin or a fluoro resin). I just need. For example, a method in which melt extrusion is performed with an extruder provided with an annular die is desirable, but the method is not limited thereto, and any method capable of forming a seamless tubular film (eg, a ram extrusion method, a centrifugal molding method) may be used. There is no particular limitation. Furthermore, a flat film is formed by an extruder equipped with a T-die, cut into required dimensions, and a tubular film having both sides sealed together can be used depending on the application. There is no particular limitation on the method or the shape of the tube.
【０００９】更に、前記の耐熱性熱可塑性樹脂からなる
チューブ状フィルムは、適宜な方法で延伸熱固定を施し
てもよいが、延伸や熱固定しないでも使用でき、延伸熱
固定に制限はない。耐熱性熱可塑性樹脂、例えば熱可塑
性ポリイミド系樹脂もしくはフッ素系樹脂から成るチュ
ーブ状フィルムの厚みは、内圧をかける程度によって異
り、所定の値のものを選択使用すればよく、特に制限は
ないが、一般的には３０〜５０μが望ましい。この際、
３０μ未満では、膨張させた場合、内圧によって破壊す
る恐れがあり、５０μを越える厚すぎて膨張させるの
に、例えば強力なコンプリサー等が必要となる等好まし
くない場合が多い。Further, the tubular film made of the above-mentioned heat-resistant thermoplastic resin may be subjected to stretching heat fixing by an appropriate method, but can be used without stretching or heat fixing, and there is no limitation on stretching heat fixing. The thickness of the heat-resistant thermoplastic resin, for example, the thickness of the tubular film made of a thermoplastic polyimide-based resin or a fluorine-based resin varies depending on the degree of applying the internal pressure, and a predetermined value may be selected and used, and there is no particular limitation. In general, 30 to 50 μm is desirable. On this occasion,
If it is less than 30 μm, it may be broken by internal pressure when it is expanded, and it is often unfavorable, for example, that a strong complicator or the like is required to expand it with a thickness exceeding 50 μm.
【００１０】本発明に係る例えば熱可塑性ポリイミド系
チューブ状フィルムもしくはフッ素系チューブ状フィル
ムは適宜な気体を吹き込み膨張させて使用するため、チ
ューブ状フィルムの一端部は気体が抜けないように密封
しておくことが望ましい。密封方法として、例えばヒー
トシールして融着させる方法、アルミニウム製の細線、
鉛線、ひも糸等で結索する方法を例示できるが、その他
適宜方法で密封すればよく、特に密封方法に制限はな
い。For example, the thermoplastic polyimide tubular film or the fluorine-based tubular film according to the present invention is used by blowing and expanding an appropriate gas, so that one end of the tubular film is sealed so that gas does not escape. It is desirable to keep. As a sealing method, for example, a method of heat sealing and fusing, a thin aluminum wire,
A method of tying with a lead wire, a string, or the like can be exemplified, but other suitable methods may be used for sealing, and there is no particular limitation on the sealing method.
【００１１】本発明に係る金型は、筒状の内周面を有す
ることが必要であり、その他の構成については、特に制
限はないが、一般的には二分割の割型方式のものを用い
るのが望ましい。材質としては、特に制限はないが軟
鋼、アルミニウム、アルミニウム合金、亜鉛合金等で作
られ、温度管理上、熱伝導度がよいものが望ましい。こ
の際、プリプレグを金型内周面に沿って配置するには、
各種方法が例示でき、このことは、後述するが、配置す
るに際し、金型内周面とプリプレグとが全面接触しても
よいし、部分的に接触してもよいし、接触していなくて
もよく、プリプレグの配置状態については特に制限はな
い。The mold according to the present invention is required to have a cylindrical inner peripheral surface, and other configurations are not particularly limited. Generally, a two-part split mold system is used. It is desirable to use. The material is not particularly limited, but is preferably made of mild steel, aluminum, an aluminum alloy, a zinc alloy, or the like, and has good thermal conductivity in terms of temperature control. At this time, to arrange the prepreg along the inner peripheral surface of the mold,
Various methods can be exemplified, and this will be described later, but when arranging, the inner peripheral surface of the mold and the prepreg may be in full contact, may be partially in contact, or may not be in contact. There is no particular limitation on the arrangement of the prepreg.
【００１２】以下、本発明の複合材料成型方法について
詳述するが、これは一実施態様であって、これのみに限
定されないのは勿論である。まず、開放した二分割金型
１の筒状内周面を構成する部分にプリプレグ２を配置し
金型を閉じた後、その中に一端を密封４した耐熱性熱可
塑性チューブ状フィルム３を挿入する。チューブ状フィ
ルムの開口端は空気等の気体封入口５に接続せしめ適宜
の方法で空気等を圧入できるようにすることが好まし
い。この際、プリプレグは、例えばシート状のものを筒
状等にして金型の筒状内周面を構成する内部に配置すれ
ばよいが、プリプレグを予め筒状に予備成型して金型内
に配置してもよい。前記予備成型する方法としては、特
に制限はないが、例えばコアやマンドレル等にシート状
プリプレグを巻付け端部を重合し融着せしめ筒状にする
方法、シート状プリプレグの端部を突き合わせ接合させ
て筒状にする方法、或は、帯状のプリプレグの側縁部の
一部を重合させながらコア等にラセン状に巻いて重合部
を融着せしめ筒状とする方法等を例示でき、この際、シ
ームや継ぎ目に段差が生じないように筒上に予備成型す
るのが望ましい。また、予め端縁部を重ね合わせ状態で
金型の内周面を構成する部分に配置し複合材料の成型と
同時に重合部分を融着し継ぎ目、段差が生じない様に筒
状としてもよく、特に制限はない。また、用途によって
はシームや継ぎ目に段差があっても差し支えない。この
際、プリプレグとコア等とのクリアランスはプリプレグ
を予備成型した後、コアを抜き取れる程度が望ましい
が、このことは特に制限がない。Hereinafter, the method for molding a composite material of the present invention will be described in detail, but this is an embodiment, and it is needless to say that the present invention is not limited to this. First, the prepreg 2 is arranged on a portion constituting the cylindrical inner peripheral surface of the opened two-part mold 1 and the mold is closed. Then, the heat-resistant thermoplastic tubular film 3 having one end sealed 4 is inserted therein. I do. The open end of the tubular film is preferably connected to a gas inlet 5 for air or the like so that air or the like can be press-fitted by an appropriate method. At this time, the prepreg may be, for example, a sheet-like material formed in a cylindrical shape or the like and arranged inside the cylindrical inner peripheral surface of the mold. It may be arranged. The method of preforming is not particularly limited, but for example, a method in which a sheet-shaped prepreg is wound around a core or a mandrel or the like, and the ends are polymerized and fused to form a cylindrical shape, and the ends of the sheet-shaped prepreg are butt-joined. Examples of the method include a method of forming a tubular shape, or a method of spirally winding a prepreg around a core or the like while superposing a part of a side edge portion of a belt-shaped prepreg and fusing the polymerized portion to form a tubular shape. It is desirable to pre-mold on a cylinder so that no step is formed at the seam or the seam. In addition, the edge portions may be arranged in advance in a portion constituting the inner peripheral surface of the mold in a state of being overlapped, and the polymerized portion may be fused at the same time as the molding of the composite material, and the joint may be formed into a tubular shape so that no step is generated, There is no particular limitation. Also, depending on the application, there may be a step in the seam or the seam. At this time, the clearance between the prepreg and the core is desirably such that the core can be removed after the prepreg is preformed, but this is not particularly limited.
【００１３】次いで、金型は閉じた後は、その後適宜な
方法で金型を加熱しプリプレグに含浸されている樹脂を
軟化せしめながら、プリプレグ内に挿入させている耐熱
性熱可塑性樹脂からなるチューブ状フィルムに空気等の
気体を適宜な方法で圧入吹き込み、チューブ状フィルム
を加熱膨張せしめる。この膨張したチューブ状フィルム
の内圧によって、前記プリプレグを金型内周面に密着さ
せて、複合材料が成型される。この際、加熱工程につい
ては、特に制限なく、どの段階で行なってもよく、具体
的には、プリプレグを金型内周面に配置する前の段階、
プリプレグを金型内周面に配置し、その中に耐熱性熱可
塑性樹脂からなるチューブ状フィルムを挿入した後の段
階、或は前記の耐熱性熱可塑性チューブ状フィルムに空
気等を吹き込み膨張せしめる段階などで加熱する方法を
例示できる加熱温度いついては、特に制限なく、金型内
に配置するプリプレグの構成成分やプリプレグ内に挿入
する耐熱性熱可塑性樹脂からなるフィルムに応じて適宜
に選定すればよい。更に、加熱時間についてもプリプレ
グの構成成分やチューブ状フィルムの構成樹脂に応じて
適宜に選定すればよく、特に制限はない。耐熱性熱可塑
性樹脂からなるチューブ状フィルムを膨張させるには、
適宜の圧縮気体、好ましくは空気をコンプレサーなどで
圧縮したエアーを吹込めばよく、特に制限はない。この
際、膨張されたチューブ状フィルムの内圧はプリプレグ
やチューブ状フィルムの構成樹脂等によって変わり、特
に制限はないが、０．１〜２０ｋｇ／ｃｍ２の範囲が好
ましい。内圧が０．１ｋｇ／ｃｍ２未満では十分にチュ
ーブ状フィルムが膨張しないこともあり、２０ｋｇ／ｃ
ｍ２を越えるとチューブ状フィルムが破壊したり裂けた
りし成型できないこともある。Next, after the mold is closed, a tube made of a heat-resistant thermoplastic resin inserted into the prepreg while heating the mold by an appropriate method to soften the resin impregnated in the prepreg. A gas such as air is blown into the tubular film by an appropriate method, and the tubular film is heated and expanded. The prepreg is brought into close contact with the inner peripheral surface of the mold by the internal pressure of the expanded tubular film, and the composite material is molded. At this time, the heating step is not particularly limited and may be performed at any stage. Specifically, a stage before the prepreg is arranged on the inner peripheral surface of the mold,
A stage after the prepreg is arranged on the inner peripheral surface of the mold and a tubular film made of a heat-resistant thermoplastic resin is inserted therein, or a stage where air or the like is blown into the heat-resistant thermoplastic tubular film to expand it. The heating temperature at which the heating method can be exemplified is not particularly limited, and may be appropriately selected according to the components of the prepreg disposed in the mold and the film made of the heat-resistant thermoplastic resin to be inserted into the prepreg. . Further, the heating time may be appropriately selected according to the constituent components of the prepreg and the constituent resin of the tubular film, and there is no particular limitation. To expand a tubular film made of heat-resistant thermoplastic resin,
An appropriate compressed gas, preferably air obtained by compressing air with a compressor or the like may be blown, and there is no particular limitation. At this time, the internal pressure of the expanded tubular film varies depending on the prepreg, the constituent resin of the tubular film, and the like, and is not particularly limited, but is preferably in the range of 0.1 to 20 kg / cm 2 . If the internal pressure is less than 0.1 kg / cm 2 , the tubular film may not expand sufficiently,
It exceeds m 2 when the tubular film may not be molded or torn or destroyed.
【００１４】以上のようにして、筒状金型内周面に沿っ
て配置したプリプレグは加熱により含浸された樹脂が軟
化等し、該プリプレグ内に挿入された耐熱性熱可塑性樹
脂（例えば熱可塑性ポリイミド系樹脂もしくはフッ素系
樹脂）から成るチューブ状フィルムの加熱膨張による内
圧で筒状内周面に密着されて成型される。その後適宜な
方法で冷却されて金型から除去されて複合材料の成型は
完了する。この際、前記チューブ状フィルムは内圧や加
熱の程度によりプリプレグの内面にラミネートされた状
態となることもあり、こうしたものも本願の複合材料と
して用いられるし、こうしたものを剥離してプリプレグ
部分のみを複合材料として使用に供してもよく、更に、
内圧や加熱の程度によっては両者がラミネートされない
こともあり、こうした場合もプリプレグ部分を複合材料
として使用に供すればよいし、ここのところは特に制限
はない。As described above, in the prepreg arranged along the inner peripheral surface of the cylindrical mold, the resin impregnated by heating is softened, and the heat-resistant thermoplastic resin (for example, thermoplastic resin) inserted into the prepreg is heated. The tubular film made of polyimide-based resin or fluorine-based resin) is closely adhered to the cylindrical inner peripheral surface by the internal pressure due to thermal expansion and molded. Thereafter, the composite material is cooled by an appropriate method and removed from the mold to complete the molding of the composite material. At this time, the tubular film may be in a state of being laminated on the inner surface of the prepreg depending on the internal pressure and the degree of heating, and such a film is also used as the composite material of the present application. It may be used as a composite material,
Depending on the internal pressure and the degree of heating, the two may not be laminated. In such a case, the prepreg portion may be used as a composite material, and there is no particular limitation.
【００１５】本発明に係る複合材料の成型方法は、例え
ばゴルフシャフト、テニスラケット等のスポーツ用品、
自動車部品、精密電気部品等の成型に応じてできる。[0015] The method of molding a composite material according to the present invention can be applied to sports goods such as golf shafts and tennis rackets,
It can be made according to the molding of automobile parts, precision electric parts, etc.
【００１６】以下、実施例に基ずいて本発明を説明す
る。Hereinafter, the present invention will be described based on examples.
【００１７】[0017]
【００１８】実施例１ ナイロン１２と炭素繊維からなるプリプレグのシートを
マンドレルに巻き付けプリプレグの端縁面を重ね合わせ
端縁部に継ぎ目が生じないように、前記プリプレグの重
ね合わせた端縁部を熱風で融着接合し、外径２９ｍｍ、
内径２５ｍｍ、長さ５００ｍｍの筒状に予備成型した。
この予備成型されたプリプレグからなる筒状体を外径３
０ｍｍ、長さ５００ｍｍの開かれた２分割方式の金型筒
状内周面に沿って配置し、この予備成型された筒状体内
に、開口部の一端をヒートシールで密封された熱可塑性
ポリイミド系樹脂からなるチューブ状フィルム（厚さ３
０μ直径２６ｍｍ）を挿入して金型を閉じた。次いで金
型を２６０℃に加熱しながら前記チューブ状フイルムに
圧縮空気を吹き込み、該チューブ状フィルムを膨張せし
めた。このとき膨張されたチューブ状フイルムの内圧は
１０ｋｇ／ｃｍ２であった。前記の筒状に予備成型され
たプリプレグは膨張されたチューブ状フィルムの内圧に
よって金型内周面に密着され、プリプレグとチューブ状
フィルムが複合したパイプに成型され、金型冷却後、成
型されたナイロンと炭素材繊維からなるプリプレグと熱
可塑性ポリイミド系樹脂とからなるフィルムとがラミネ
ートされた構成の複合パイプを金型から除去した。この
複合パイプは外径３０ｍｍ、内径２６ｍｍで寸法精度が
優れた製品仕上がり表面がきれいなものであった。Example 1 A prepreg sheet made of nylon 12 and carbon fiber was wound around a mandrel, and the edges of the prepreg were overlapped with each other so that no seams were formed at the edges. Fusion bonding, outer diameter 29mm,
It was preformed into a cylindrical shape having an inner diameter of 25 mm and a length of 500 mm.
The cylindrical body made of the pre-formed prepreg has an outer diameter of 3 mm.
0 mm, 500 mm in length, arranged along the inner peripheral surface of an open two-part mold cylinder, into this preformed cylinder, one end of an opening is sealed with a heat-sealed thermoplastic polyimide Tubular film (thickness 3)
(0 μ diameter 26 mm) was inserted and the mold was closed. Then, compressed air was blown into the tubular film while the mold was heated to 260 ° C. to expand the tubular film. At this time, the internal pressure of the expanded tubular film was 10 kg / cm 2 . The prepreg preformed into a cylindrical shape was closely adhered to the inner peripheral surface of the mold by the internal pressure of the expanded tubular film, molded into a pipe in which the prepreg and the tubular film were combined, and cooled and then molded. A composite pipe having a configuration in which a prepreg made of nylon and carbon fiber and a film made of a thermoplastic polyimide resin were laminated was removed from the mold. This composite pipe had an outer diameter of 30 mm and an inner diameter of 26 mm and had excellent dimensional accuracy and a clean finished product surface.
【００１９】実施例２ ポリカーボネート系樹脂を含浸したガラス繊維から成る
プリプレグをコアに巻き付けプリプレグの端部を突き合
わせ熱風で融着接合しシームレス状の外径７０ｍｍ、内
径６６ｍｍの筒状に予備成型した。この予備成型された
筒を内径７２ｍｍ、長さ１ｍの開かれている２分割金型
内周面に沿って配置し、次いで該筒内に直径２６ｍｍ、
長さ１ｍ、厚さ３０μの開口部の一端を密封した熱可塑
性ポリイミド系樹脂からなるチューブ状フィルムを挿入
すること以外は実施例１と同様にしてポリカーボネート
系樹脂を含浸したガラス繊維からなるプリプレグと熱可
塑性ポリイミド系樹脂とからなるフィルムがラミネート
された構成の複合パイプを得た。Example 2 A prepreg made of glass fiber impregnated with a polycarbonate resin was wound around a core, and the ends of the prepreg were butted and joined by hot air to form a seamless cylindrical preform having an outer diameter of 70 mm and an inner diameter of 66 mm. This preformed cylinder is placed along the inner peripheral surface of an open two-piece mold having an inner diameter of 72 mm and a length of 1 m, and then has a diameter of 26 mm in the cylinder.
A prepreg made of glass fiber impregnated with a polycarbonate-based resin in the same manner as in Example 1 except that a tubular film made of a thermoplastic polyimide-based resin in which one end of an opening having a length of 1 m and a thickness of 30 µ is sealed is inserted. A composite pipe having a configuration in which a film made of a thermoplastic polyimide resin was laminated was obtained.
【００２０】実施例３ ナイロン１２と炭素繊維からなるプリプレグのシートを
マンドレルに巻き付けプリプレグの端縁面を重ね合わせ
端縁部に継ぎ目が生じないように、前記プリプレグの重
ね合わせた端縁部を熱風で融着接合し、外径２９ｍｍ、
内径２５ｍｍ、長さ５００ｍｍの筒状に予備成型した。
この予備成型されたプリプレグからなる筒状体を外径３
０ｍｍ、長さ５００ｍｍの開かれた２分割方式の金型筒
状内周面に沿って配置し、この予備成型された筒状体内
に、開口部の一端をヒートシールで密封されたテトラフ
ロロエチレン・パーフロロアルキル共重合体（ＰＦＡ）
からなるチューブ状フィルム（厚さ３０μ直径２６ｍ
ｍ）を挿入して金型を閉じた。次いで金型を２６０℃に
加熱しながら前記チューブ状フイルムに圧縮空気を吹き
込み、該チューブ状フィルムを膨張せしめた。このとき
膨張されたチューブ状フイルムの内圧は０．５ｋｇ／ｃ
ｍ２でから１０ｋｇ／ｃｍ２まで漸次加圧された。前記
の筒状に予備成型されたプリプレグは膨張されたチュー
ブ状フィルムの内圧によって金型内周面に密着され、プ
リプレグとチューブ状フィルムが複合したパイプに成型
され、金型冷却後、成型されたナイロンと炭素材繊維か
らなるプリプレグと熱可塑性ポリイミド系樹脂とからな
るフィルムとがラミネートされた構成の複合パイプを金
型から除去した。この複合パイプは外径３０ｍｍ、内径
２６ｍｍで寸法精度が優れた製品仕上がり表面がきれい
なものであった。Example 3 A prepreg sheet made of nylon 12 and carbon fiber was wound around a mandrel, and the edges of the prepreg were overlapped with each other so that no seams were formed at the edges. Fusion bonding, outer diameter 29mm,
It was preformed into a cylindrical shape having an inner diameter of 25 mm and a length of 500 mm.
The cylindrical body made of the pre-formed prepreg has an outer diameter of 3 mm.
Tetrafluoroethylene, which is arranged along the inner peripheral surface of an open two-part mold cylinder having a length of 0 mm and a length of 500 mm, and having one end of an opening sealed by heat sealing in this preformed cylinder.・ Perfluoroalkyl copolymer (PFA)
Tubular film (thickness 30μ, diameter 26m)
m) was inserted and the mold was closed. Then, compressed air was blown into the tubular film while the mold was heated to 260 ° C. to expand the tubular film. At this time, the internal pressure of the expanded tubular film is 0.5 kg / c.
The pressure was gradually increased from m 2 to 10 kg / cm 2 . The prepreg preformed into a cylindrical shape was closely adhered to the inner peripheral surface of the mold by the internal pressure of the expanded tubular film, molded into a pipe in which the prepreg and the tubular film were combined, and cooled and then molded. A composite pipe having a configuration in which a prepreg made of nylon and carbon fiber and a film made of a thermoplastic polyimide resin were laminated was removed from the mold. This composite pipe had an outer diameter of 30 mm and an inner diameter of 26 mm and had excellent dimensional accuracy and a clean finished product surface.
【００２１】実施例４ ポリプロピレン樹脂と炭素繊維からなるプリプレグのシ
ートをマンドレルに巻き付け、プリプレグの端縁部を重
ね合せ熱線で前記重ね合せ部を接合し外径２９ｍｍ、内
径２５ｍｍ、長さ５００ｍｍの筒状に予備成型した。こ
の予備成型されたプリプレグからなる筒状体を外径３０
ｍｍ、長さ５００ｍｍの開かれた２分割方式の金型筒状
内周面に沿って配置し、この予備成型された筒状体内に
開口部の一端をヒートシールして密封されたエチレンテ
トラフロロエチレン共重合体（ＥＴＦＥ）から成るチュ
ーブ状フィルム（厚さ１５０μ、直径２６ｍｍ）を挿入
して金型を閉じた。次いで、金型を２００℃に加熱しな
がら前記チューブ状フィルムに圧縮空気を吹き込み、該
チューブ状フィルムを膨張せしめた。この時、チューブ
状フィルムの内圧を０．１ｋｇ／ｃｍ２から５ｋｇ／ｃ
ｍ２まで漸次加圧せしめた。前記の筒状に予備成形され
たプリプレグは膨張されたチューブ状フィルムの内圧に
よって、金型内周面に密着され、プリプレグとチューブ
状フィルムが複合されたパイプに成形され、金型冷却後
ポリプロプレンと炭素繊維からなるプリプレグにエチレ
ンテトラフロロエチレン共重合体（ＥＴＦＥ）からなる
フィルムがラミネートされた構成の複合パイプを除去し
た。この複合パイプは外径３０ｍｍ、内径２６ｍｍであ
った。次いで、該パイプ内面からエチレンテトラフロロ
エチレン共重合体（ＥＴＦＥ）からなるフィルムを剥離
したパイプは内外面とも寸法精度、製品仕上り表面が綺
麗なパイプが得られた。Example 4 A sheet of prepreg composed of a polypropylene resin and carbon fiber was wound around a mandrel, the edges of the prepreg were overlapped, and the overlapped portions were joined with a hot wire to form a cylinder having an outer diameter of 29 mm, an inner diameter of 25 mm, and a length of 500 mm. It was preformed into a shape. The cylindrical body made of the pre-formed prepreg has an outer diameter of 30.
Ethylene tetrafluoroethylene, which is arranged along the inner peripheral surface of an open two-part mold cylinder having a length of 500 mm and a length of 500 mm, and one end of an opening is heat-sealed in this preformed cylinder. A tubular film (150 μm in thickness, 26 mm in diameter) made of an ethylene copolymer (ETFE) was inserted, and the mold was closed. Next, compressed air was blown into the tubular film while heating the mold to 200 ° C. to expand the tubular film. At this time, the internal pressure of the tubular film is increased from 0.1 kg / cm 2 to 5 kg / c.
to m 2 accounted assay gradually pressurized. The prepreg preformed into a cylindrical shape is tightly adhered to the inner peripheral surface of the mold by the internal pressure of the expanded tubular film, molded into a pipe in which the prepreg and the tubular film are combined, and cooled after the mold is cooled. A composite pipe having a configuration in which a film made of ethylene tetrafluoroethylene copolymer (ETFE) was laminated on a prepreg made of carbon fiber and carbon fiber was removed. This composite pipe had an outer diameter of 30 mm and an inner diameter of 26 mm. Next, the pipe from which the film made of the ethylene tetrafluoroethylene copolymer (ETFE) was peeled off from the inner surface of the pipe was obtained with good dimensional accuracy on both the inner and outer surfaces and the finished product surface.
【００２２】[0022]
【発明の効果】本発明は耐熱性、耐圧性に優れた耐熱
性、熱可塑性樹脂、例えば熱可塑性ポリイミド系樹脂、
フッ素系重合体からなるフィルムを用いることにより、
従来困難であった複合材料の成型を容易にしたものであ
る。今後パイプをはじめとして、ゴルフ用シャフト、テ
ニスラケット等スポーツ用品、自動車や精密電気材料の
部品の製造に応用可能であり、更に広い範囲での用途開
発が期待できる。According to the present invention, a heat resistant thermoplastic resin having excellent heat resistance and pressure resistance, for example, a thermoplastic polyimide resin,
By using a film made of a fluoropolymer,
This facilitates molding of a composite material, which has been difficult in the past. In the future, it can be applied to the manufacture of parts such as pipes, golf shafts, sports equipment such as tennis rackets, automobiles and precision electric materials, and the development of applications in a wider range can be expected.
【図１】金型内周面に沿ってプリプレグを配置し、その
中にチューブ状フィルムを挿入した断面図。FIG. 1 is a cross-sectional view in which a prepreg is arranged along an inner peripheral surface of a mold and a tubular film is inserted therein.
【図２】金型内周面に複合材料を成型した断面図。FIG. 2 is a sectional view in which a composite material is molded on an inner peripheral surface of a mold.
【図３】図２の金型を開き該金型を除去した断面図。FIG. 3 is a sectional view of the mold shown in FIG. 2 with the mold opened and the mold removed;
１ 金型 ２ プリプレグ ３ チューブ状フィルム ４ チューブ状フィルムのシール部 ５ 空気吸入部 DESCRIPTION OF SYMBOLS 1 Die 2 Pre-preg 3 Tubular film 4 Seal part of tubular film 5 Air suction part
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｋ 105:08 Ｂ２９Ｌ 9:00 23:00 31:30 31:34 31:52 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B29K 105: 08 B29L 9:00 23:00 31:30 31:34 31:52
Claims (3)
プレグの中に耐熱性熱可塑性樹脂からなるチューブ状フ
ィルムを挿入し、前記チューブ状フィルムを加熱膨張せ
しめ、その内圧によって前記プリプレグを前記筒状内周
面に密着せしめたことを特徴とする複合材料の成型方
法。1. A tubular film made of a heat-resistant thermoplastic resin is inserted into a prepreg disposed along a cylindrical inner peripheral surface of a mold, and the tubular film is heated and expanded. A composite material, which is in close contact with the cylindrical inner peripheral surface.
ド系樹脂である請求項１記載の複合材料の成型方法。2. The method for molding a composite material according to claim 1, wherein the heat-resistant thermoplastic resin is a thermoplastic polyimide resin.
る請求項１記載の複合材料の成型方法。3. The method for molding a composite material according to claim 1, wherein the heat-resistant thermoplastic resin is a fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13150693A JPH10217321A (en) | 1992-10-26 | 1993-04-21 | Molding method of composite material |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4329827A JPH07223255A (en) | 1992-10-26 | 1992-10-26 | Method for molding of composite material |
| JP4-329827 | 1992-10-26 | ||
| JP13150693A JPH10217321A (en) | 1992-10-26 | 1993-04-21 | Molding method of composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10217321A true JPH10217321A (en) | 1998-08-18 |
Family
ID=26466324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13150693A Pending JPH10217321A (en) | 1992-10-26 | 1993-04-21 | Molding method of composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10217321A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006217349A (en) * | 2005-02-04 | 2006-08-17 | Yokohama Rubber Co Ltd:The | Compact range and its manufacturing method |
| JP2008044288A (en) * | 2006-08-21 | 2008-02-28 | Gns:Kk | Method for manufacturing pipe joint utilizing tubular member made of fluororesin and pipe joint |
| KR101219397B1 (en) | 2010-08-31 | 2013-01-11 | 연세대학교 산학협력단 | Method for manufacturing composite hollow structure |
| CN113544083A (en) * | 2019-06-19 | 2021-10-22 | Khs科波普拉斯特有限责任公司 | Method and device for producing filled containers from preforms |
-
1993
- 1993-04-21 JP JP13150693A patent/JPH10217321A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006217349A (en) * | 2005-02-04 | 2006-08-17 | Yokohama Rubber Co Ltd:The | Compact range and its manufacturing method |
| JP4534778B2 (en) * | 2005-02-04 | 2010-09-01 | 横浜ゴム株式会社 | Compact range manufacturing method |
| JP2008044288A (en) * | 2006-08-21 | 2008-02-28 | Gns:Kk | Method for manufacturing pipe joint utilizing tubular member made of fluororesin and pipe joint |
| KR101219397B1 (en) | 2010-08-31 | 2013-01-11 | 연세대학교 산학협력단 | Method for manufacturing composite hollow structure |
| US8419881B2 (en) | 2010-08-31 | 2013-04-16 | Hyundai Motor Company | Method for manufacturing hollow composite structure |
| CN113544083A (en) * | 2019-06-19 | 2021-10-22 | Khs科波普拉斯特有限责任公司 | Method and device for producing filled containers from preforms |
| CN113544083B (en) * | 2019-06-19 | 2023-10-27 | Khs科波普拉斯特有限责任公司 | Method and device for producing filled containers from prefabricated blanks |
| US11845214B2 (en) | 2019-06-19 | 2023-12-19 | Khs Gmbh | Method and device for producing filled containers from preforms |
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