JPH1148318A - Method and apparatus for manufacturing hollow fiber-reinforced resin molding - Google Patents
Method and apparatus for manufacturing hollow fiber-reinforced resin moldingInfo
- Publication number
- JPH1148318A JPH1148318A JP9205996A JP20599697A JPH1148318A JP H1148318 A JPH1148318 A JP H1148318A JP 9205996 A JP9205996 A JP 9205996A JP 20599697 A JP20599697 A JP 20599697A JP H1148318 A JPH1148318 A JP H1148318A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- reinforced resin
- molding material
- hollow fiber
- molding
- 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.)
- Granted
Links
- 239000011347 resin Substances 0.000 title claims abstract description 34
- 229920005989 resin Polymers 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title abstract description 32
- 238000000465 moulding Methods 0.000 title abstract description 27
- 239000012778 molding material Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 239000003733 fiber-reinforced composite Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 12
- 239000000835 fiber Substances 0.000 abstract description 10
- 239000012783 reinforcing fiber Substances 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 6
- 238000005470 impregnation Methods 0.000 abstract description 5
- 239000012510 hollow fiber Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 238000009730 filament winding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000011208 reinforced composite material Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 241000282537 Mandrillus sphinx Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は中空状成形品の製造
装置及び製造方法に関し、詳しくは、改良された内圧成
形方法による中空状繊維強化樹脂成形体の製造装置及び
その方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for producing a hollow molded article, and more particularly to an apparatus and a method for producing a hollow fiber reinforced resin molded article by an improved internal pressure molding method.
【０００２】[0002]
【従来の技術】繊維強化合成樹脂（ＦＲＰ）は、エポキ
シ，ポリエステルのような熱硬化性樹脂や、ポリエチレ
ン，ポリプロピレン，ポリアミド，ＰＰＳ，ＰＥＥＫ等
の熱可塑性樹脂をマトリックス材とし、これにガラス繊
維，炭素繊維，アラミッド繊維等の強化繊維を混繊して
得られるものであり、軽量で且つ強度特性に優れるた
め、航空宇宙産業から建築，スポーツ用品のような身近
な製品に至るまで、幅広い分野において利用されてい
る。2. Description of the Related Art Fiber-reinforced synthetic resin (FRP) is made of a thermosetting resin such as epoxy or polyester or a thermoplastic resin such as polyethylene, polypropylene, polyamide, PPS or PEEK as a matrix material. It is obtained by blending reinforcing fibers such as carbon fiber and aramid fiber. It is lightweight and has excellent strength properties, so it can be used in a wide range of fields from the aerospace industry to familiar products such as construction and sports equipment. It's being used.
【０００３】ＦＲＰを管状ないし中空体に成形する方法
としては、遠心成形法，プルトルージョン成形法，フィ
ラメントワインディング成形法等が知られている。ま
ず、前記遠心成形法は、回転する円筒体の内面に、この
円筒体内に同心的に配備されたローラから繊維を巻き付
け、この繊維にマトリックス用の樹脂を噴霧して含浸さ
せた後、硬化させる方法であるが、比較的径が大きく、
単純な形状の製品しか製造できず、しかも装置が大掛か
りとなって製造コストが高くなる等の欠点を有してい
る。[0003] As a method of forming the FRP into a tubular or hollow body, a centrifugal molding method, a pultrusion molding method, a filament winding molding method and the like are known. First, in the centrifugal molding method, a fiber is wound around a rotating cylindrical body from a roller concentrically provided in the cylindrical body, and the fiber is impregnated by spraying a matrix resin, and then cured. Method, but the diameter is relatively large,
It has the drawback that it can only produce products with a simple shape, and that the size of the device is large and the production cost is high.
【０００４】また、前記プルトルージョン成形法は、樹
脂を強化繊維機材に含浸させた後、金型を利用して引き
抜き、樹脂を硬化させて成形品を得る方法であるが、一
様の断面の真直パイプしか製造できず、設備費も嵩む等
の欠点を有している。また、前記フィラメントワインデ
ィング成形法は、樹脂を含浸した繊維をマンドリルに巻
き付け、樹脂が硬化した後にマンドレルを引き抜く方法
であり、長繊維を富配合させることができるので比較的
高強度の中空体が得られる。しかしながら、軸対称の製
品しか製造することができず、また設備費も嵩む等の欠
点を有する。[0004] The above-mentioned pultrusion molding method is a method in which a resin is impregnated into a reinforcing fiber material, then pulled out using a mold, and the resin is cured to obtain a molded product. It has drawbacks such that only straight pipes can be manufactured and equipment costs are increased. Further, the filament winding molding method is a method in which a fiber impregnated with a resin is wound around a mandrill and the mandrel is pulled out after the resin is cured, and a relatively high-strength hollow body can be obtained because long fibers can be richly mixed. Can be However, it has drawbacks such that only axially symmetric products can be manufactured, and equipment costs are increased.
【０００５】また、これらの成形法においては、マトリ
ックスとして熱硬化性樹脂を用いることが想定されてお
り、マトリックスが熱可塑性樹脂である場合には適用が
困難であった。このような事情により、マトリックス樹
脂が熱硬化性であっても熱可塑性であっても 適用可能
であり、容易にパイプ状の繊維強化樹脂製品を成形する
ことのできる方法として、内圧成形法と呼ばれる方法が
開発されるに至った。Further, in these molding methods, it is assumed that a thermosetting resin is used as a matrix, and it is difficult to apply the matrix when the matrix is a thermoplastic resin. Due to such circumstances, it is applicable whether the matrix resin is thermosetting or thermoplastic, and is referred to as an internal pressure molding method as a method that can easily mold a pipe-shaped fiber reinforced resin product. A method has been developed.
【０００６】前記内圧成形法は、金型キャビティ内に筒
状の成形素材を配備し、これを筒の内側から圧力を与え
て金型に密着させた状態にて加熱硬化させる方法であ
り、内圧を付与するための手段によって次のような方法
に分類される。The internal pressure molding method is a method of disposing a cylindrical molding material in a mold cavity, applying pressure from the inside of the cylinder, and heating and curing the material in a state in which the material is in close contact with the mold. Are classified into the following methods by means for providing
【０００７】（ア）耐熱性に優れると共に熱膨張率の高
い材料、例えば合成ゴムや四弗化樹脂からなるコアに、
筒状の成形素材を巻き付けて、金型キャビティ内に配置
し、加熱によりコアが熱膨張する際の圧力をもって、成
形素材を金型内面に押し付けて成形する方法。(A) A material having excellent heat resistance and a high coefficient of thermal expansion, for example, a core made of synthetic rubber or tetrafluoride resin,
A method in which a cylindrical molding material is wound and placed in a mold cavity, and the molding material is pressed against the inner surface of the mold with pressure when the core thermally expands by heating.
【０００８】（イ）ナイロンやシリコンゴムのような、
可撓性があり、しかも耐熱性に優れた材料で成形した袋
に、筒状の成形素材を巻き付け、或いは、芯金を用いて
予備成形した成形素材の中心にこの袋を配備したもの
を、金型キャビティ内に配備し、袋内に圧搾空気のよう
な加圧流体を送り込んで袋を膨張させ、成形素材を金型
内面に押し付けて成形する方法。(A) Nylon or silicone rubber,
A flexible, yet heat-resistant bag formed by winding a cylindrical molding material around a bag, or using a cored bar to arrange this bag at the center of a preformed molding material, A method of disposing in a mold cavity, injecting a pressurized fluid such as compressed air into the bag to inflate the bag, and pressing the molding material against the inner surface of the mold to perform molding.
【０００９】[0009]
【発明が解決しようとする課題】ところが、内圧成形法
によるときは、成形素材に対する加圧に関して、最も凡
用性の大きな丸断面形状成形体の場合、筒体はその膨張
によりほぼ同時に型内面に接触、ほぼ均一に押圧するこ
ととなる。成形素材中には多くの空気が含まれており、
その大部分は成形時に型見切り面より排出されるが、少
量は成形体の内部，表面に残留してボイド，ピンボール
などの成型不良を起こす。However, in the case of the internal pressure molding method, in the case of a molded article having a round cross section having the greatest generality with respect to pressurization of a molding material, the cylindrical body expands almost simultaneously with the inner surface of the mold due to its expansion. The contact and the pressing are almost uniform. The molding material contains a lot of air,
Most of it is discharged from the mold parting surface during molding, but a small amount remains on the inside and surface of the molded body and causes molding defects such as voids and pinballs.
【００１０】これは、図１に示すように膨張した筒体が
成型素材を押圧するとき、剛性の大きな金属板で押圧す
るのと異なり、筒体加圧面が変形し、静水圧により近い
加圧状態となることから、成型素材の押圧が不十分とな
り強化繊維中ならびに繊維束の交差する目合い部の残留
空気の排出ができにくくボイド，ピンホールの発生をき
たし、また、強化繊維と樹脂の含浸状態を悪化させる。
この不良は、加圧力の増大で多少軽減はできるが根本的
に改善するのは難しい。This is different from the case where the expanded cylinder presses the molding material as shown in FIG. 1, unlike the case where the cylinder is pressed with a rigid metal plate. Due to this condition, the pressure of the molding material is insufficient, and it is difficult to discharge the residual air in the reinforcing fibers and at the joints where the fiber bundles intersect, resulting in the generation of voids and pinholes. Deteriorate impregnation.
This defect can be reduced to some extent by increasing the pressing force, but it is difficult to fundamentally improve it.
【００１１】[0011]
【課題を解決するための手段】そこで本発明は、従来の
内圧成形法を改良し、成形品において、ボイド，ピンホ
ール不良をなくし、強化繊維に対するマトリックス樹脂
の含浸状態を良好にする方法を提供することを目的とす
る。SUMMARY OF THE INVENTION Accordingly, the present invention provides a method of improving the conventional internal pressure molding method, eliminating voids and pinhole defects in molded products, and improving the state of impregnation of the reinforcing fibers with the matrix resin. The purpose is to do.
【００１２】この目的を達成するための本発明は、可撓
性が良好で且つ耐熱性に優れた材料よりなる筒体の周囲
に、繊維強化樹脂よりなる成形素材を配備し、筒体に内
圧を加えて膨張させることにより成形素材を金型キャビ
ティ内面に押圧し、硬化させて中空状繊維強化樹脂成形
体を製造する装置において、筒体の断面を、金型の型見
切り線箇所を厚肉部とし、最も離れた箇所よりも薄肉部
として形成して金型内に収納してなる中空状繊維強化樹
脂成形体の製造装置及びその方法としたことにより、筒
体の型内面の押圧時期を制御し、型見切り線を最終押圧
部となすことで残留ガスの排出を促すもので、筒体の型
内面の押圧時期の制御方法として、筒体の肉厚を故意に
変化させることにより、薄肉部と厚肉部の膨張開始時期
の差を利用するものである。According to the present invention for achieving this object, a molding material made of fiber reinforced resin is provided around a cylinder made of a material having good flexibility and excellent heat resistance, and an internal pressure is applied to the cylinder. In a device that presses the molding material against the inner surface of the mold cavity by adding and expanding it, and cures it to produce a hollow fiber reinforced resin molded product, the section of the cylinder is thickened at the parting line of the mold. And a method of manufacturing a hollow fiber-reinforced resin molded body formed as a thinner portion than the farthest part and housed in a mold, and the method of pressing the inner surface of the cylindrical body with the pressing time. It controls the release of residual gas by controlling the mold parting line as the final pressing part, and as a method of controlling the pressing timing of the inner surface of the cylinder, by intentionally changing the wall thickness of the cylinder, the thin wall Use the difference in the expansion start time between the thick section and the thick section. It is.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面に基づいて説明すると、Ａは、減圧方式による金
属製の金型であって、上型１と下型２とから構成されて
いる。その上型１と下型２とで、後述する中空状成形品
の外径に対応する金型キャビティ３が形成され、その上
型１と下型２とが合わさる箇所を型見切り部Ｐとする。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A is a metal mold formed by a decompression method, and is composed of an upper mold 1 and a lower mold 2. I have. The upper mold 1 and the lower mold 2 form a mold cavity 3 corresponding to the outer diameter of a hollow molded article described later, and a portion where the upper mold 1 and the lower mold 2 meet is referred to as a mold parting part P. .
【００１４】４は筒体であり、可撓性が良好で且つ耐熱
性に優れた材料としてのゴム材料が用いられている。該
筒体４の周囲において、断面が厚肉部４ａと薄肉部４ｂ
とから構成されている。該薄肉部４ｂは、最小薄肉部４
ｂ1 とこれに近似した厚さの箇所も含まれ、同様に、厚
肉部４ａも全体に厚肉となっているのではなく、最大厚
肉部４ａ1 とこれに近似した厚さの箇所も含まれる。そ
の厚肉部４ａと薄肉部４ｂとの境界は、最大厚肉部４ａ
1 と最小薄肉部４ｂ1 とを合計した厚さの２分の１の箇
所をいう。Reference numeral 4 denotes a cylindrical body, which is made of a rubber material having good flexibility and excellent heat resistance. Around the cylindrical body 4, the cross-sections are thick portions 4 a and thin portions 4 b.
It is composed of The thin portion 4b is the minimum thin portion 4
portion of b 1 and a thickness approximate to also include, as well, the thick portion 4a even rather than being a thick throughout, locations of thickness that approximates to the maximum thick portion 4a 1 Is also included. The boundary between the thick part 4a and the thin part 4b is the maximum thick part 4a.
It refers to one of the parts of one half of the minimum thin part 4b 1 and the total thickness of.
【００１５】前記金型キャビティ３の第１実施の形態で
は、断面が円形の場合である。この場合、図２及び図４
（Ａ）では、筒体４の内径が真円をなし、外径が楕円を
なし、これによって、直径方向において２箇所に薄肉部
４ｂ，４ｂが形成され、その他の箇所は、厚肉部４ａ，
４ａとして形成されている。前記筒体４の厚肉部４ａ，
４ａの最大厚肉部４ａ1 ，４ａ1 が前記金型Ａの型見切
り部Ｐに位置し、且つその薄肉部４ｂ，４ｂが金型キャ
ビティ３の奥部の略中央に位置するように構成されてい
る。In the first embodiment of the mold cavity 3, the cross section is circular. In this case, FIGS. 2 and 4
In (A), the inner diameter of the cylindrical body 4 forms a perfect circle, and the outer diameter forms an ellipse, whereby thin portions 4b, 4b are formed in two places in the diametric direction, and the other portions are thick portions 4a. ,
4a. The thick portion 4a of the cylindrical body 4
The maximum thickness portions 4a 1 , 4a 1 of the mold 4a are located at the mold parting portion P of the mold A, and the thin portions 4b, 4b thereof are located substantially at the center of the depth of the mold cavity 3. ing.
【００１６】また、金型キャビティ３の第２実施の形態
では、断面が略正方形の場合である。この場合には、上
型１と下型２とに、断面略Ｖ形状に形成されて、これが
合致すると、金型キャビティ３は、略断面正方形状に形
成される。この場合の筒体４は、第１の実施の形態〔図
４（Ａ）〕の変形例であり、図３及び図４（Ｂ）に示す
ように、筒体４の内径及び外径が楕円をなし、これによ
って、直径方向において２箇所に薄肉部４ｂ，４ｂが形
成され、前記直径方向に直交する箇所は、厚肉部４ａ，
４ａとして形成されている。In the second embodiment of the mold cavity 3, the cross section is substantially square. In this case, the upper mold 1 and the lower mold 2 are formed to have a substantially V-shaped cross section, and when they match, the mold cavity 3 is formed to have a substantially square cross-section. The cylindrical body 4 in this case is a modification of the first embodiment (FIG. 4A), and as shown in FIGS. 3 and 4B, the inner and outer diameters of the cylindrical body 4 are elliptical. Thereby, the thin portions 4b, 4b are formed at two places in the diametric direction, and the portions orthogonal to the diametric direction are the thick portions 4a, 4b.
4a.
【００１７】その設置としては、図３では、前記筒体４
の厚肉部４ａ，４ａの最大厚肉部４ａ1 ，４ａ1 が前記
金型Ａの型見切り部Ｐに位置し、且つその薄肉部４ｂ，
４ｂの最小薄肉部４ｂ1 ，４ｂ1 が金型キャビティ３の
奥部の略中央に位置するように構成されている。As for the installation, in FIG.
The thickest portions 4a 1 , 4a 1 of the thick portions 4a, 4a are located at the mold parting portion P of the mold A, and the thin portions 4b, 4b,
The minimum thin portions 4b 1 and 4b 1 of the mold 4b are configured to be located substantially at the center of the back of the mold cavity 3.
【００１８】筒状の成形素材５は、強化繊維と樹脂から
なり、前記筒体４と金型キャビティ３との間に挿入され
る。図１乃至図３では、成形素材５の内部に、筒体４が
挿入され、この状態では、これが、金型Ａ内の金型キャ
ビティ３に挿入され、前記筒体４の厚肉部４ａ，４ａ及
び薄肉部４ｂ，４ｂが前述の所定位置になるようにセッ
トされるものである。The cylindrical molding material 5 is made of a reinforcing fiber and a resin, and is inserted between the cylindrical body 4 and the mold cavity 3. In FIGS. 1 to 3, the cylinder 4 is inserted into the molding material 5. In this state, the cylinder 4 is inserted into the mold cavity 3 in the mold A, and the thick portions 4 a, 4 a, 4a and the thin portions 4b, 4b are set so as to be at the aforementioned predetermined positions.
【００１９】また、可撓性が良好で且つ耐熱性に優れた
材料からなる筒体としては、ゴム材料が用いられ、より
好ましくは、弗素系のゴム材料が用いられるが特にこれ
に限定されるものでない。型の材質は、鉄，アルミなど
の金属，成形温度に十分耐え得ることのできる樹脂など
が用いられる。As the cylinder made of a material having good flexibility and excellent heat resistance, a rubber material is used, and more preferably, a fluorine-based rubber material is used, but it is particularly limited to this. Not something. As the material of the mold, a metal such as iron or aluminum, a resin capable of sufficiently withstanding the molding temperature, or the like is used.
【００２０】図中６は盲蓋体で、前記金型キャビティ３
内の一方の開口部を塞ぐ役割をなし、継手蓋体７には、
通気口７ａが開口され、図示しない箇所からの窒素ガス
の流入配管に連結されている。In the figure, reference numeral 6 denotes a blind cover, which is the mold cavity 3.
It plays the role of closing one opening inside, and the joint lid 7 has
A vent 7a is opened and connected to a nitrogen gas inflow pipe from a location not shown.
【００２１】次に、本発明の方法について説明すると、
可撓性が良好で且つ耐熱性に優れた材料からなる筒体の
周囲に、強化繊維と樹脂からなる成形素材を配備し、こ
れを型に設備し、筒体の内部から圧力を加えて膨張させ
ることにより成形素材を型の成形面に押圧することで中
空状の繊維強化複合材料成形体を製造する方法におい
て、筒体の型見切り線近傍における肉厚を最大にし、型
見切り線より最も離れた部分の肉厚を最小にすることに
より、型見切り線より最も離れた型成形面にまず筒体を
接触押圧させ、徐々に接触面積を拡大し成形素材中の残
留ガスを排除しつつ、型見切り線を最終押圧部となすこ
とにより型見切り面から残留ガスを排出させる。これに
より残留ガスに起因するボイドの不良，ピンホールの不
良のない、また、強化繊維に対するマトリックス樹脂の
含浸状態の良好な成形品を得ることができる。Next, the method of the present invention will be described.
A molding material made of reinforced fiber and resin is provided around a cylinder made of a material with good flexibility and excellent heat resistance, and this is installed in a mold, and expanded by applying pressure from inside the cylinder. In the method of manufacturing a hollow fiber-reinforced composite material molded article by pressing the molding material against the molding surface of the mold, the thickness of the cylindrical body near the mold parting line is maximized, and the most distant from the mold parting line By minimizing the wall thickness of the part, the cylindrical body is first pressed into contact with the molding surface farthest from the parting line, and the contact area is gradually enlarged to eliminate the residual gas in the molding material. The residual gas is discharged from the mold parting surface by forming the parting line as the final pressing part. As a result, it is possible to obtain a molded article free from void defects and pinhole defects due to the residual gas and having a good state in which the reinforcing fibers are impregnated with the matrix resin.
【００２２】[0022]
【実施例１】前記成形素材５における強化繊維としての
炭素繊維を、マトリックス樹脂としてナイロン６樹脂を
使用した。具体的には、炭素繊維とナイロン６樹脂繊維
との混織糸によるブレード材で、炭素繊維は、６０容量
％であった。また、成形素材５は、フッ素ゴムよりなる
筒体４の周囲を被覆するように２層に積層した。また、
筒体４の厚肉部４ａ，４ａの最大厚肉部４ａ1 ，４ａ1
は、２．５mmで、薄肉部４ｂ，４ｂの最小薄肉部４
ｂ1 ，４ｂ1 が１．５mmとして、その間は、肉厚を徐々
に変化させた。Example 1 In the molding material 5, carbon fibers were used as reinforcing fibers, and nylon 6 resin was used as a matrix resin. Specifically, the blade material was a mixed material of carbon fiber and nylon 6 resin fiber, and the carbon fiber content was 60% by volume. The molding material 5 was laminated in two layers so as to cover the periphery of the cylindrical body 4 made of fluoro rubber. Also,
The thickest portions 4a 1 , 4a 1 of the thick portions 4a, 4a of the cylinder 4
Is 2.5 mm and is the minimum thin part 4 of the thin parts 4b, 4b.
The thickness was gradually changed while b 1 and 4b 1 were 1.5 mm.
【００２３】このブレード材を成形素材５として、成形
品の設定厚さが１mmとして外形断面が真円である中空状
成形品を成形した。圧力１０kgf/cm2 の窒素ガスで筒体
４を膨張させ、図２（Ｃ）及び図３（Ｃ）に示すごとく
成形素材５を金型Ａの成形面に押圧し、これを２５５°
Ｃに加熱し、１０分間保持した後冷却し、中空状成形品
を得た。この実施例では、図５（Ｂ）に示すように、ボ
イド１０及びピンホール１１が殆ど存在しない状態に成
形できた。Using this blade material as a molding material 5, a hollow molded article having a set thickness of 1 mm and a perfect circular cross section was molded. The cylinder 4 is inflated with nitrogen gas at a pressure of 10 kgf / cm 2 , and the molding material 5 is pressed against the molding surface of the mold A as shown in FIGS.
C, held for 10 minutes, and then cooled to obtain a hollow molded article. In this example, as shown in FIG. 5 (B), the molding could be performed in a state where the voids 10 and the pinholes 11 hardly existed.
【００２４】[0024]
【実施例２】実施例１と同様の成形方法，成形素材，成
形条件で外形断面が正方形である中空状成形品を成形し
た。図３（Ａ）乃至（Ｃ）に示すごとく筒体４を金型Ａ
内に配置し成形を行った。この実施例でも、図５（Ｂ）
に示すように、ボイド１０及びピンホール１１が殆ど存
在しない状態に成形できた。Example 2 A hollow molded article having a square outer cross section was molded using the same molding method, molding material and molding conditions as in Example 1. As shown in FIGS. 3A to 3C, the cylindrical body 4 is
And molded. Also in this embodiment, FIG.
As shown in (1), molding was possible in a state where the voids 10 and the pinholes 11 hardly existed.
【００２５】[0025]
【発明の効果】請求項１の発明では、本発明によれば、
従来の内圧成形法にわずかな改良を加えるだけで、ボイ
ド，ピンホール不良がなく、強化繊維とマトリックス樹
脂の含浸状態が良好な中空状繊維強化複合材料を得るこ
とができる。According to the first aspect of the present invention, according to the present invention,
A hollow fiber reinforced composite material free from voids and pinholes and having a good impregnation state between the reinforcing fibers and the matrix resin can be obtained by only slightly improving the conventional internal pressure forming method.
【００２６】請求項２の方法の発明でも、ボイド，ピン
ホール不良がなく、強化繊維とマトリックス樹脂の含浸
状態が良好な中空状繊維強化複合材料を得ることができ
る。According to the second aspect of the present invention, a hollow fiber reinforced composite material free from voids and pinholes and having a good impregnation state between the reinforcing fibers and the matrix resin can be obtained.
【図１】本発明の成形状態を示す金型箇所の断面図FIG. 1 is a sectional view of a mold portion showing a molding state according to the present invention.
【図２】（Ａ）は本発明の第１の実施の形態で、加圧前
の金型箇所の断面図 （Ｂ）は本発明の第１の実施の形態で、加圧途中の金型
箇所の断面図 （Ｃ）は本発明の第１の実施の形態で、加圧完了の金型
箇所の断面図FIG. 2A is a cross-sectional view of a mold portion before pressurizing according to a first embodiment of the present invention, and FIG. 2B is a cross-sectional view of a mold portion during pressurizing according to the first embodiment of the present invention. (C) is a cross-sectional view of a mold part after pressurization is completed according to the first embodiment of the present invention.
【図３】（Ａ）は本発明の第２の実施の形態で、加圧前
の金型箇所の断面図 （Ｂ）は本発明の第２の実施の形態で、加圧途中の金型
箇所の断面図 （Ｃ）は本発明の第２の実施の形態で、加圧完了の金型
箇所の断面図FIG. 3A is a sectional view of a mold portion before pressurizing according to a second embodiment of the present invention, and FIG. 3B is a sectional view of a mold during pressurizing according to a second embodiment of the present invention. (C) is a second embodiment of the present invention, is a cross-sectional view of the pressurized die location
【図４】（Ａ）は筒体の一部斜視図 （Ｂ）は筒体の一部斜視図FIG. 4A is a partial perspective view of a cylindrical body. FIG. 4B is a partial perspective view of a cylindrical body.
【図５】（Ａ）は加圧前の成形素材の断面図 （Ｂ）は加圧完了した成形素材の断面図5A is a cross-sectional view of a molding material before pressing, and FIG. 5B is a cross-sectional view of a molding material after pressing is completed.
Ａ…金型 Ｐ…型見切り部 Ｍ…中空状繊維強化樹脂成形体 ３…金型キャビティ ４…筒体 ４ａ…厚肉部 ５…成形素材 A: mold P: mold parting part M: hollow fiber reinforced resin molded body 3: mold cavity 4: cylindrical body 4a: thick part 5: molding material
Claims (2)
よりなる筒体の周囲に、繊維強化樹脂よりなる成形素材
を配備し、筒体に内圧を加えて膨張させることにより成
形素材を金型キャビティ内面に押圧し、硬化させて中空
状繊維強化樹脂成形体を製造する装置において、筒体の
断面を、金型の型見切り線箇所を厚肉部とし、最も離れ
た箇所よりも薄肉部として形成して金型内に収納してな
ることを特徴とする中空状繊維強化樹脂成形体の製造装
置。1. A molding material made of a fiber-reinforced resin is provided around a cylinder made of a material having good flexibility and excellent heat resistance, and the molding material is expanded by applying internal pressure to the cylinder. Is pressed against the inner surface of the mold cavity, and cured to produce a hollow fiber-reinforced resin molded body, the cross section of the cylindrical body, the mold parting line location of the mold and the thick part, than the farthest place An apparatus for producing a hollow fiber-reinforced resin molded product, which is formed as a thin portion and housed in a mold.
よりなる筒体の周囲に、繊維強化樹脂よりなる成形素材
を配備し、筒体に内圧を加えて膨張させることにより成
形素材を金型キャビティ内面に押圧し、硬化して中空状
繊維強化樹脂成形体を製造する方法において、まず、筒
体の直径方向の厚肉部を型見切り部箇所に位置させ、こ
の状態で、筒体内に窒素ガスを封入させ、前記型見切り
線箇所を最終押圧部として成形することを特徴とする中
空状繊維強化複合材料の製造方法。2. A molding material made of a fiber-reinforced resin is provided around a cylindrical body made of a material having good flexibility and excellent heat resistance, and expanded by applying an internal pressure to the cylindrical body. Is pressed against the inner surface of the mold cavity and cured to produce a hollow fiber-reinforced resin molded body.First, the thick part in the diameter direction of the cylindrical body is positioned at the mold parting portion, and in this state, the cylindrical A method for producing a hollow fiber-reinforced composite material, wherein nitrogen gas is sealed in a body and the parting line is formed as a final pressing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20599697A JP3792359B2 (en) | 1997-07-31 | 1997-07-31 | Manufacturing apparatus for hollow fiber reinforced resin molded body and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20599697A JP3792359B2 (en) | 1997-07-31 | 1997-07-31 | Manufacturing apparatus for hollow fiber reinforced resin molded body and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1148318A true JPH1148318A (en) | 1999-02-23 |
| JP3792359B2 JP3792359B2 (en) | 2006-07-05 |
Family
ID=16516188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20599697A Expired - Fee Related JP3792359B2 (en) | 1997-07-31 | 1997-07-31 | Manufacturing apparatus for hollow fiber reinforced resin molded body and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3792359B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009545469A (en) * | 2006-07-31 | 2009-12-24 | エアバス・オペレーションズ・ゲーエムベーハー | Connecting device for molded cores for producing fiber composite parts used in the aerospace industry |
| JP2011011515A (en) * | 2009-07-06 | 2011-01-20 | Aitec:Kk | Manufacturing method of vent tube |
| EP2590160A2 (en) | 2011-11-02 | 2013-05-08 | Yamaha Corporation | Method of fabricating bow stick of stringed instrument and bow stick of stringed instrument |
| DE102017212890A1 (en) * | 2017-07-27 | 2019-01-31 | Bayerische Motoren Werke Aktiengesellschaft | Device for stabilizing a hollow core for the production of a fiber composite component |
| CN116494509A (en) * | 2023-06-28 | 2023-07-28 | 西南石油大学 | Basalt fiber composite pipe preparation mold |
| CN117681458B (en) * | 2024-02-02 | 2024-04-26 | 哈尔滨远驰航空装备有限公司 | Aviation multidirectional connecting pipe fitting and forming method thereof |
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| KR102006384B1 (en) * | 2017-03-10 | 2019-08-01 | 최영기 | method of manufacturing hollow article having constant thickness by blow molding, manufacturing apparatus, and hollow article |
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1997
- 1997-07-31 JP JP20599697A patent/JP3792359B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009545469A (en) * | 2006-07-31 | 2009-12-24 | エアバス・オペレーションズ・ゲーエムベーハー | Connecting device for molded cores for producing fiber composite parts used in the aerospace industry |
| JP2011011515A (en) * | 2009-07-06 | 2011-01-20 | Aitec:Kk | Manufacturing method of vent tube |
| EP2590160A2 (en) | 2011-11-02 | 2013-05-08 | Yamaha Corporation | Method of fabricating bow stick of stringed instrument and bow stick of stringed instrument |
| US9311902B2 (en) | 2011-11-02 | 2016-04-12 | Yamaha Corporation | Method of fabricating bow stick of stringed instrument and bow stick of stringed instrument |
| DE102017212890A1 (en) * | 2017-07-27 | 2019-01-31 | Bayerische Motoren Werke Aktiengesellschaft | Device for stabilizing a hollow core for the production of a fiber composite component |
| CN116494509A (en) * | 2023-06-28 | 2023-07-28 | 西南石油大学 | Basalt fiber composite pipe preparation mold |
| CN116494509B (en) * | 2023-06-28 | 2023-09-08 | 西南石油大学 | Basalt fiber composite pipe preparation mold |
| CN117681458B (en) * | 2024-02-02 | 2024-04-26 | 哈尔滨远驰航空装备有限公司 | Aviation multidirectional connecting pipe fitting and forming method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3792359B2 (en) | 2006-07-05 |
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