JPH0456740B2 - - Google Patents
Info
- Publication number
- JPH0456740B2 JPH0456740B2 JP59170247A JP17024784A JPH0456740B2 JP H0456740 B2 JPH0456740 B2 JP H0456740B2 JP 59170247 A JP59170247 A JP 59170247A JP 17024784 A JP17024784 A JP 17024784A JP H0456740 B2 JPH0456740 B2 JP H0456740B2
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- resin
- resin film
- fiber
- winding
- 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.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 238000004804 winding Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- JMGNVALALWCTLC-UHFFFAOYSA-N 1-fluoro-2-(2-fluoroethenoxy)ethene Chemical compound FC=COC=CF JMGNVALALWCTLC-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/564—Winding and joining, e.g. winding spirally for making non-tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
〔産業上の利用分野〕
本発明は繊維強化樹脂構造体、特に内部に治具
などの金具を含まない空間構造体の製造方法に関
する。
〔従来技術〕
繊維強化樹脂構造体とは、あらかじめ樹脂液を
含浸させた糸または紐（ロービング）等の長い糸
状繊維強化材を巻型または治具の周囲に所定の太
さに巻きつけた後、硬化して得るもので、その一
例として英国特許出願第2103572A号明細書には
一本のシヤフトに挿通された複数のプレートエン
ドからなる巻き取り治具を用いた負荷支材（load
bearing strut）の製造法が開示されてある。
しかるにこの方法は樹脂含浸繊維を上記の治具
に係止して熱硬化処理した後に、プレートエンド
やシヤフト等の金具を除去することができず、製
品内部に留まつて金具の重量分だけ製品の軽量化
硬化を減殺している。そこで上記のシヤフトとエ
ンドプレートからなる巻き取り治具の代りに、金
属製マンドレルに樹脂含浸繊維を巻きつけ、熱硬
化処理した後に機械力を用いてマンドレルを抜き
取る方法が考えられるがこの方法では硬化した樹
脂がマンドレルの周囲に強固に密着し、マンドレ
ルの抜取り作業が困難になり、製品を損傷する恐
れがある。
〔本発明が解決しようとする問題点〕
本発明はマンドレルを用いて角型断面を有する
空間構造体を製造するに当り、マンドレ抜取りの
困難さを解決して内部に治具等の金具を残さず、
軽量化された構造体の成形が容易な製造方法を提
供しようとするものである。
〔問題点を解決するための具体的手段〕
このため本発明者等はコーナ部に所定の間隔を
おいて係止用のピンを着脱可能に立てた、角型断
面を有するマンドレルの周面の一部または全面に
樹脂フイルムを配置し、樹脂含浸繊維をピンに係
止しながら樹脂フイルムの上からマンドレルの周
囲に巻きつけ、熱硬化処理後にピンを抜き取ると
ともに樹脂フイルムを軸方向に引抜いて、マンド
レルと製品との間に間隙を生成せしめることにし
た。
〔作用〕
本発明において用いるマンドレルは空間構造体
の形状に応じて四角形ないし多角形の断面を有
し、そのコーナ部に適当な間隔をもつて穴を設け
ピンが差込まれるようにしてある。これらのピン
の高さは樹脂含浸繊維の巻き数により決定され、
また巻きつけの際の張力により折れないようにピ
ンの太さを決定する。そしてピンとピンとの間隔
を変えることによつて樹脂含浸繊維の巻きつけ角
度を自由に調整できる。
樹脂フイルムには非粘着性、耐熱性を有し、か
つ引抜きの際の張力に十分耐えられる引張強度を
有する樹脂、例えば四弗化エチレン−六弗化プロ
ピレン共重合体（FEP）、四弗化エチレン−パ−
フルオロビニルエーテル（PFA）等の弗素樹脂
から厚さ250μm程度に成形したものが用いられ
る。このような樹脂フイルムであるので熱硬化処
理に耐えて、容易に引抜くことが可能となり、そ
の結果、マンドレルと製品との間に間隙が形成さ
れ、マンドレルが非拘束となり抜き取りが容易と
なる。
〔実施例〕
以下、本発明の実施例を図面を参照して説明す
る。
第１図は四角形断面の空間構造体を製造する例
を示したもので、角形のマンドレル１の周囲に厚
さ250μmのフイルム２をグリースを介して貼着す
る。マンドレル１の４箇所のコーナ部３にはピン
４がa1，b1，c1，…；a2，b2，c2，…；a3，b3，
c3，…；a4，b4，c4，…の位置に一定の間隔をも
つてとりつけられ、各点のピン４の数は１本でも
２本でもよいが、本実施例においては端部は３
本、中間部は２本とした。
第２図はマンドレル１の断面図を示し、例えば
フイルム２の幅は20mm、長さは300mmである。
このようなマンドレル１に炭素繊維またはガラ
ス繊維からなるロービングにエポキシ樹脂を体積
比にして1.4倍含浸させた樹脂含浸繊維５を第１
図に示す如くピン４にからめながらまきつけ硬化
後にピン４を抜いたとき、ボルト孔として役立つ
ようにしておく。なお第４図イはピン４の座標で
表わした巻きつけパターンを示し、第４図−ロは
これを展開したシーケンスを表わす。
上記シーケンスは矩形波の部分と三角波の部分
とからなり、矩形波の部分はコーナ部３における
軸方向の巻きつけ順序を示し、三角波の部分はヘ
リカル方向の巻きつけ順序を示している。そして
始めの矩角波と三角波とからなるシーケンスで一
回目の巻きつけを終り、次に該シーケンスを逆行
して二回目の巻きつけを行なう。このように約２
回巻きつけて最終的に太さ約25mmの第４図−イの
形状の空間構造体６が得られる。
次に本発明によつて得た空間構造体ＡのＩビー
ム状のFRPの曲げ強度を測定し、従来のプレー
トエンドを用いて製造した空間構造体Ｂにおける
Ｉビーム状のFRPと比較して第３図のグラフに
示し、また別にＡ，Ｂの繊維体積含有率を測定し
た結果とともに下記の表に示す。
[Industrial Application Field] The present invention relates to a method for manufacturing a fiber-reinforced resin structure, particularly a space structure that does not include metal fittings such as jigs inside. [Prior art] A fiber-reinforced resin structure is made by winding a long filamentous fiber-reinforced material such as thread or string (roving) pre-impregnated with resin liquid around a winding form or jig to a predetermined thickness. As an example, British Patent Application No. 2103572A describes a load support material using a winding jig consisting of a plurality of plate ends inserted through a single shaft.
A method of manufacturing a bearing strut is disclosed. However, in this method, after the resin-impregnated fibers are fixed in the above-mentioned jig and heat-cured, metal fittings such as plate ends and shafts cannot be removed, and they remain inside the product and the product is damaged by the weight of the metal fittings. The weight reduction and hardening are reduced. Therefore, instead of using the above-mentioned winding jig consisting of a shaft and end plate, a method can be considered in which resin-impregnated fibers are wound around a metal mandrel, heat-cured, and then the mandrel is pulled out using mechanical force. The resin adheres tightly around the mandrel, making it difficult to remove the mandrel and potentially damaging the product. [Problems to be solved by the present invention] The present invention solves the difficulty of removing the mandrel when manufacturing a space structure having a square cross section using a mandrel, and leaves metal fittings such as jigs inside. figure,
The present invention aims to provide a manufacturing method that allows easy molding of a lightweight structure. [Specific Means for Solving the Problems] For this reason, the present inventors have developed a method on the circumferential surface of a mandrel having a rectangular cross section, in which locking pins are removably erected at predetermined intervals in the corners. A resin film is placed on a part or the entire surface, the resin-impregnated fiber is locked onto a pin and wound around the mandrel from above the resin film, and after the heat curing process, the pin is removed and the resin film is pulled out in the axial direction. It was decided to create a gap between the mandrel and the product. [Operation] The mandrel used in the present invention has a rectangular or polygonal cross section depending on the shape of the spatial structure, and holes are provided at appropriate intervals at the corners so that pins can be inserted. The height of these pins is determined by the number of turns of resin-impregnated fiber,
Also, determine the thickness of the pin so that it does not break due to the tension during wrapping. By changing the distance between the pins, the winding angle of the resin-impregnated fibers can be freely adjusted. The resin film is made of a resin that is non-adhesive, heat resistant, and has a tensile strength sufficient to withstand tension during drawing, such as tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoropropylene copolymer (FEP), etc. ethylene per
A material molded from a fluororesin such as fluorovinyl ether (PFA) to a thickness of approximately 250 μm is used. Such a resin film can withstand heat curing treatment and can be easily pulled out. As a result, a gap is formed between the mandrel and the product, and the mandrel is unrestrained and can be easily pulled out. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an example of manufacturing a spatial structure having a rectangular cross section, in which a 250 μm thick film 2 is pasted around a rectangular mandrel 1 via grease. Pins 4 are attached to the four corners 3 of the mandrel 1 at a 1 , b 1 , c 1 , ...; a 2 , b 2 , c 2 , ...; a 3 , b 3 ,
c 3 ,...; a 4 , b 4 , c 4 ,... are attached at regular intervals, and the number of pins 4 at each point may be one or two, but in this embodiment Part is 3
There were two books in the middle. FIG. 2 shows a cross-sectional view of the mandrel 1. For example, the width of the film 2 is 20 mm and the length is 300 mm. Resin-impregnated fibers 5, which are made by impregnating rovings made of carbon fiber or glass fiber with 1.4 times the volume of epoxy resin, are first applied to such a mandrel 1.
As shown in the figure, wrap it around the pin 4 so that it will serve as a bolt hole when the pin 4 is removed after hardening. Note that FIG. 4A shows a winding pattern expressed by the coordinates of the pin 4, and FIG. 4-B shows a sequence in which this is developed. The above sequence consists of a rectangular wave part and a triangular wave part, where the rectangular wave part shows the winding order in the axial direction at the corner portion 3, and the triangular wave part shows the winding order in the helical direction. Then, the first winding is completed with the sequence consisting of the initial rectangular wave and the triangular wave, and then the sequence is reversed to perform the second winding. Like this about 2
By winding it around, a space structure 6 having a thickness of about 25 mm and having the shape shown in FIG. 4-A is finally obtained. Next, the bending strength of the I-beam-shaped FRP of the spatial structure A obtained according to the present invention was measured, and the bending strength was compared with that of the I-beam-shaped FRP of the spatial structure B manufactured using conventional plate ends. The results are shown in the graph of Figure 3, and are shown in the table below along with the results of separately measuring the fiber volume content of A and B.
【表】
上記、繊維体積含有率の比較においてＡがＢよ
りも高い値を示したのは角形マンドレルに巻きつ
けた樹脂含浸繊維が弾性を有するフイルムからの
反撥力を受けて樹脂液が表面に浸出し、繊維の体
積含有率を高めたためと思われる。なお、上記フ
イルムの反撥力によつて樹脂液が繊維間の微細空
隙部まで十分に浸透している効果も考えられる。
〔発明の効果〕
上記の如く、本発明の方法においては、離型時
にマンドレルと製品との間に間隙を生成し、離型
が容易となつているので製品を損傷することがな
く、かつマンドレル、ピン等を半永久的に使用す
ることができる。
さらに本発明方法によつて得られた空間構造体
は従来の方法によるものよりも同じ太さでも繊維
の体積含有率が高いので強度特性が向上し、軽量
化されたことゝ相俟つて品質の高いものとなる。[Table] In the above comparison of fiber volume content, A showed a higher value than B because the resin-impregnated fibers wound around the rectangular mandrel received a repulsive force from the elastic film and the resin liquid was applied to the surface. This is probably due to leaching and increasing the volume content of fibers. It is also considered that the repulsive force of the film allows the resin liquid to sufficiently penetrate into the microscopic voids between the fibers. [Effects of the Invention] As described above, in the method of the present invention, a gap is created between the mandrel and the product at the time of mold release, making mold release easy, so the product is not damaged, and the mandrel , pins, etc. can be used semi-permanently. Furthermore, the spatial structure obtained by the method of the present invention has a higher volume content of fibers even though the thickness is the same than that obtained by the conventional method, so the strength characteristics are improved and the weight is reduced. It will be expensive.
第１図は本発明実施例の斜視図を表わし、第２
図はマンドレルの断面図を表わし、第３図は曲げ
強度のグラフを表わし、第４図−イは空間構造体
の斜視図を表わし、第４図−ロは巻きつけパター
ンのシーケンスを表わす。
図中、１……マンドレル、２……樹脂フイル
ム、３……コーナ部、４……ピン、５……樹脂含
浸繊維、６……空間構造体。
FIG. 1 shows a perspective view of an embodiment of the present invention, and FIG.
The figures represent a cross-sectional view of the mandrel, FIG. 3 represents a graph of bending strength, FIG. 4-a represents a perspective view of the spatial structure, and FIG. 4-b represents the sequence of winding patterns. In the figure, 1... mandrel, 2... resin film, 3... corner part, 4... pin, 5... resin impregnated fiber, 6... spatial structure.
Claims (1)
所定の間隔をおいて着脱可能に係止用のピンを立
て、そして該マンドレルの周面の一部または全面
に樹脂フイルムを貼着した後、樹脂含浸繊維を上
記のピンに係止しながらマンドレルの周囲に巻き
つけ、熱硬化処理後にピンを抜き取るとともに樹
脂フイルムを軸方向に引抜いて、マンドレルと製
品との間に間隙を生成せしめた後、該マンドレル
を除去することを特徴とする繊維強化樹脂構造体
の製造方法。1 At the corner of a mandrel with a square cross section,
After setting removable locking pins at predetermined intervals and pasting a resin film on part or the entire circumferential surface of the mandrel, the mandrel is attached while the resin-impregnated fibers are locked to the pins. A fiber-reinforced resin characterized in that the mandrel is removed after a gap is created between the mandrel and the product by wrapping the resin film around the mandrel and removing the pin after thermosetting treatment and pulling out the resin film in the axial direction. Method of manufacturing the structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59170247A JPS6149833A (en) | 1984-08-15 | 1984-08-15 | Manufacture of fiber-reinforced resin structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59170247A JPS6149833A (en) | 1984-08-15 | 1984-08-15 | Manufacture of fiber-reinforced resin structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149833A JPS6149833A (en) | 1986-03-11 |
| JPH0456740B2 true JPH0456740B2 (en) | 1992-09-09 |
Family
ID=15901397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59170247A Granted JPS6149833A (en) | 1984-08-15 | 1984-08-15 | Manufacture of fiber-reinforced resin structural member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6149833A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133396A (en) * | 1987-11-19 | 1989-05-25 | Matsushita Electric Ind Co Ltd | Manufacture of hybrid thick film integrated circuit |
| ES2320944A1 (en) * | 2005-12-02 | 2009-05-29 | Fpk, S.A. | Composite part reinforced with a fibre part by means of diverse winding processes or direct application processes of unidirectional fibre filaments, and its methods of manufacture |
| EP1849588B1 (en) * | 2006-04-27 | 2011-06-01 | AKsys GmbH | Method of manufacture of a composite part |
| CN110745605A (en) * | 2019-11-25 | 2020-02-04 | 美尔森银河新材料(烟台)有限公司 | Carbon cloth reel production equipment and method |
-
1984
- 1984-08-15 JP JP59170247A patent/JPS6149833A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6149833A (en) | 1986-03-11 |
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