JPH04257406A - Fiber reinforced resin forming method - Google Patents
Fiber reinforced resin forming methodInfo
- Publication number
- JPH04257406A JPH04257406A JP3039360A JP3936091A JPH04257406A JP H04257406 A JPH04257406 A JP H04257406A JP 3039360 A JP3039360 A JP 3039360A JP 3936091 A JP3936091 A JP 3936091A JP H04257406 A JPH04257406 A JP H04257406A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mat
- reinforcing fibers
- resin
- glass fiber
- 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 29
- 229920005989 resin Polymers 0.000 title claims abstract description 29
- 239000000835 fiber Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 16
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 26
- 101100495270 Caenorhabditis elegans cdc-26 gene Proteins 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 2
- 239000003365 glass fiber Substances 0.000 description 29
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/302—Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、強化用繊維を使用する
繊維強化樹脂製品の成形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 a method for molding fiber-reinforced resin products using reinforcing fibers.
【0002】0002
【従来の技術】近時、FRP(ガラス繊維強化樹脂)製
品が自動車の外板等の各種成形品に使用されるようにな
った。このような繊維強化樹脂成形品の成形は、例えば
エンジンフ−ドの場合には、成形品の剛性、強度等を確
保するため、ガラス繊維等の強化用繊維を複数枚重ねて
予めマット状に成形し、このガラス繊維マットを金型に
セットし、型内に溶融樹脂を注入して成形している。2. Description of the Related Art Recently, FRP (glass fiber reinforced resin) products have come to be used for various molded products such as automobile outer panels. In order to ensure the rigidity and strength of the molded product, for example in the case of an engine hood, such fiber-reinforced resin molded products are formed by stacking multiple layers of reinforcing fibers such as glass fibers in advance into a mat shape. This glass fiber mat is set in a mold, and molten resin is injected into the mold.
【0003】特開平1−253410号公報には、上記
のようなレジンインジェクション(RI)によるFRP
成形法において、金型内にセットする強化フィラメント
を正確に位置決めするため、強化フィラメントと同質の
弾性材からなるクリップ状のフィラメント固定具を用い
、フィラメント固定具の弾力を利用して成形金型のキャ
ビテイ壁面に強化フィラメントを押さえ込んで固定し、
型内に溶融樹脂を注入して成形するようにしたものが記
載されている。[0003] Japanese Unexamined Patent Application Publication No. 1-253410 describes FRP by resin injection (RI) as described above.
In the molding method, in order to accurately position the reinforced filament to be set in the mold, a clip-shaped filament fixture made of the same elastic material as the reinforced filament is used, and the elasticity of the filament fixture is used to position the reinforced filament in the mold. Press and fix the reinforced filament against the cavity wall,
A method in which molten resin is injected into a mold for molding is described.
【0004】0004
【発明が解決しようとする課題】前記のようなRIやR
TM等のFRP成形法においては、強化用ガラス繊維が
成形品外にでないように型内に精度良くセットする必要
がある。ところが、実際の成形時においては、ガラス繊
維マットが所定の寸法より短く成形されていたり、所定
の寸法に成形されていても、型内に精度良くセットされ
ない場合があり、これらの場合には次の問題が発生する
。[Problem to be solved by the invention] The above-mentioned RI and R
In FRP molding methods such as TM, it is necessary to accurately set the reinforcing glass fibers in the mold so that they do not come out of the molded product. However, during actual molding, the glass fiber mat may be molded shorter than the specified dimensions, or even if it is molded to the specified dimensions, it may not be set accurately in the mold. problem occurs.
【0005】予め成形したガラス繊維マットが所定の寸
法より短く成形されている場合には、図5に示すように
、上型1と下型2を閉じたときに、キャビテイ3の周縁
部にガラス繊維マット4sが配設されない部位3a,3
aができ、この状態で溶融樹脂を注入して成形した製品
には、製品の周縁部に樹脂リッチ部が形成される。この
樹脂リッチ部は、ガラス繊維が少ないか、ほとんど存在
しないので成形品の強度が、不足し、割れが発生し易い
。[0005] If the pre-formed glass fiber mat is formed shorter than a predetermined size, as shown in FIG. Areas 3a, 3 where the fiber mat 4s is not provided
A is formed, and in a product molded by injecting molten resin in this state, a resin-rich portion is formed at the peripheral edge of the product. In this resin-rich area, there is little or almost no glass fiber, so the strength of the molded product is insufficient and cracks are likely to occur.
【0006】また、ガラス繊維マットが所定の寸法より
長く成形されている場合には、図6に示すように上型1
と下型2を閉じたときに、キャビテイ周縁部のガラス繊
維4c,4cが無理に押されてキャビテイ周縁部に密着
し、場合によっては上型1と下型2の隙間に挟み込まれ
て型が完全に閉じず、上型1と下型2との間に間隙tが
生じたままとなり、製品にバリが大きく発生する。In addition, when the glass fiber mat is molded to a length longer than a predetermined size, the upper mold 1 as shown in FIG.
When the lower mold 2 is closed, the glass fibers 4c, 4c on the periphery of the cavity are forced and come into close contact with the periphery of the cavity, and in some cases may be caught in the gap between the upper mold 1 and the lower mold 2, causing the mold to close. The mold does not close completely, and a gap t remains between the upper mold 1 and the lower mold 2, resulting in large burrs on the product.
【0007】前記特開平1−253410号公報に記載
されたRIによるFRP成形法においては、成形品が単
純な形状で且大型の場合にフィラメント固定具を用いる
ことが可能となるが、エンジンフ−ドやドア−等のパネ
ル製品の場合には、成形品の厚さが、2.5〜3.0m
mと非常に薄いので固定具の製作が困難でコスト高とな
るとともに、固定具のセット作業が困難となる。また、
固定具と注入した樹脂との密着性が不充分となるので、
製品の強度が劣るおそれが生じ、更に、固定具の一部が
成形品の表面に出るので、表面品質上の問題も発生する
。[0007] In the FRP molding method using RI described in the above-mentioned Japanese Patent Application Laid-open No. 1-253410, it is possible to use a filament fixture when the molded product has a simple shape and is large, but the engine frame In the case of panel products such as boards and doors, the thickness of the molded product is 2.5 to 3.0 m.
Since it is very thin (m), it is difficult to manufacture the fixture, which increases the cost, and also makes it difficult to set the fixture. Also,
Because the adhesion between the fixture and the injected resin will be insufficient,
There is a risk that the strength of the product will be degraded, and furthermore, a portion of the fixing device will be exposed to the surface of the molded product, resulting in surface quality problems.
【0008】本発明は、上記の問題点を解決し、薄板パ
ネルの成形においても強化用繊維のセッテイングを容易
にし、繊維強化樹脂成形品の品質を良好に保つ成形方法
を提供することを目的とするものである。The purpose of the present invention is to solve the above-mentioned problems and provide a molding method that facilitates the setting of reinforcing fibers even in the molding of thin panels and maintains good quality of fiber-reinforced resin molded products. It is something to do.
【0009】[0009]
【課題を解決するための手段】本発明は、強化用繊維を
予め所定の形状に予備成形した繊維マットの端末周縁部
を、該強化用繊維と同質の繊維で予め断面コの字状に成
形した非所マットで包み込んで成形金型にセットするか
、複数の強化用繊維の中の製品表面側となる強化用繊維
で他の強化用繊維の端末周縁部を包むように予め所定形
状に繊維マットを予備成形して成形金型にセットし、該
金型へ溶融樹脂を注入する繊維強化樹脂成形方法である
。[Means for Solving the Problems] The present invention provides for forming the end peripheral edge of a fiber mat, in which reinforcing fibers are preformed into a predetermined shape, into a U-shaped cross section using fibers of the same quality as the reinforcing fibers. Either wrap the reinforcing fibers in a plastic mat and set it in a mold, or wrap the reinforcing fibers on the product surface side in a predetermined shape so that the reinforcing fibers wrap around the terminal edges of the other reinforcing fibers. This is a fiber-reinforced resin molding method that involves pre-molding a material, setting it in a molding mold, and injecting molten resin into the mold.
【0010】0010
【作用】成形金型にセットする強化用繊維マットは、そ
の端末周縁部を同質の繊維マットで包まれているので、
金型を閉じたときに強化用繊維の末端が金型に挟み込ま
れるおそれがなく、また成形金型にセットされた強化用
繊維マットは成形部の周縁部に強化用繊維が密に配設さ
れるので、成形後の製品に樹脂リッチ部が発生しない。[Operation] The reinforcing fiber mat set in the mold is wrapped around its terminal edge with a fiber mat of the same quality.
There is no risk of the ends of the reinforcing fibers being caught in the mold when the mold is closed, and the reinforcing fiber mat set in the molding mold has reinforcing fibers densely arranged around the periphery of the molding part. As a result, resin-rich areas do not occur in the molded product.
【0011】[0011]
【実施例】セット状態の成形用型の一部を示す図1(A
)において、下型2を例えばエンジンフ−ド成形品の外
表面を成形するキャビ型とし、上型1をエンジンフ−ド
成形品の裏面を成形するコア型とし、下型2のキャビテ
イ3に複数枚の予備成形したガラス繊維マット4をセッ
トする。この場合、ガラス繊維で予め断面コの字状に予
備成形した、図1(B)に示すような帯状の補助マット
5でガラス繊維マット4の端末の周縁部を包み込んでセ
ットする。[Example] Fig. 1 (A
), the lower mold 2 is a cavity mold for molding the outer surface of the engine hood molded product, the upper mold 1 is a core mold for molding the back surface of the engine hood molded product, and the cavity 3 of the lower mold 2 is A plurality of preformed glass fiber mats 4 are set. In this case, a band-shaped auxiliary mat 5 as shown in FIG. 1B, which is preformed from glass fiber and has a U-shaped cross section, is set by wrapping the peripheral edge of the end of the glass fiber mat 4.
【0012】図1に示す補助マット5で包み込んだガラ
ス繊維マット4をセットした場合は、成形品の端末部の
ガラス繊維含有率が大幅に上がる。成形品のガラス繊維
含有率を一様にするには、図2に示すように、上型1の
成形面の端末周縁部に補助マット5の挟み代に相当する
凹部7を形成し、図1に示すと同様に補助マット5で包
み込んだガラス繊維マット4をセットする。図2におい
て、上型1の樹脂注入孔6から溶融樹脂を型内に注入す
ると、溶融樹脂がガラス繊維マット4及び補助マット5
内に浸入するとともにそれらの表面を覆い、一体に成形
する。この場合には、成形品の端末部の厚さが厚くなる
が、張出し部が成形品の裏面であるので製品として支障
がないばかりか、製品端末部の強度が上がる。When the glass fiber mat 4 wrapped with the auxiliary mat 5 shown in FIG. 1 is set, the glass fiber content in the end portion of the molded product is greatly increased. In order to make the glass fiber content of the molded product uniform, as shown in FIG. The glass fiber mat 4 wrapped with the auxiliary mat 5 is set in the same manner as shown in FIG. In FIG. 2, when molten resin is injected into the mold from the resin injection hole 6 of the upper mold 1, the molten resin flows into the glass fiber mat 4 and the auxiliary mat 5.
It penetrates into the inside and covers their surfaces, molding them into one piece. In this case, the thickness of the end portion of the molded product is increased, but since the overhanging portion is on the back side of the molded product, not only does this not cause any problem as a product, but the strength of the end portion of the product is increased.
【0013】次に、別の成形方法について説明する。図
1に示す下型2の成形面側の補助マット5の部分5aは
、この部分のガラス繊維含有率が高く且つ突出している
ので、成形後に成形品の表面にガラス繊維が出る可能性
がある。成形品の表面側となる最外層のガラス繊維マッ
ト4aを、補助マット5で包み込む他のガラス繊維マッ
ト4より短めに予めカットして置き、図3(A)に示す
ように補助マット5で端末の周縁部を包み込んだガラス
繊維マット4と重ねてセットする。また、図3(B)に
示すように、図2に示す凹部7を形成した上型1を使用
して同様にセットするようにしてもよい。この成形方法
では、成形後に製品の表面にガラス繊維が出るおそれが
なくなる。Next, another molding method will be explained. The portion 5a of the auxiliary mat 5 on the molding surface side of the lower mold 2 shown in FIG. 1 has a high glass fiber content and protrudes, so there is a possibility that glass fibers will appear on the surface of the molded product after molding. . The outermost glass fiber mat 4a, which will be the surface side of the molded product, is cut in advance to be shorter than the other glass fiber mats 4 to be wrapped with the auxiliary mat 5, and the auxiliary mat 5 is used to terminate the mat as shown in FIG. 3(A). The glass fiber mat 4 that wraps around the periphery of the mat 4 is placed on top of the mat 4. Alternatively, as shown in FIG. 3(B), the upper mold 1 having the recessed portion 7 shown in FIG. 2 may be used and set in the same manner. This molding method eliminates the risk of glass fibers appearing on the surface of the product after molding.
【0014】次に、さらに別の成形方法を図4について
説明する。この成形方法では、補助マット5を使用する
ことなく、ガラス繊維マット4の予備成形時に、最外層
のガラス繊維マット4bの端末の周縁部をL字状に折り
曲げて内層のガラス繊維マット4を包み込んで一体に予
め成形し、これを成形型にセットして成形する。Next, yet another molding method will be explained with reference to FIG. In this forming method, without using the auxiliary mat 5, at the time of preforming the glass fiber mat 4, the outermost layer glass fiber mat 4b is bent into an L-shape at the end thereof to wrap the inner layer glass fiber mat 4. It is preformed in one piece, and then set in a mold and molded.
【0015】[0015]
【発明の効果】本発明は、ガラス繊維マットの成形金型
への挟み込みによるバリの発生や成形品に樹脂リッチ層
が発生するのを有効に防止するとともに、ガラス繊維マ
ットの成形金型へのセッテイングが容易となり、また、
製品の表面品質を良好に保つことができる。Effects of the Invention The present invention effectively prevents the formation of burrs and resin-rich layers on molded products due to the glass fiber mat being caught in the mold, and also prevents the glass fiber mat from being caught in the mold. Setting is easy, and
Good surface quality of the product can be maintained.
【図1】本発明の一実施例の一部断面図と補助マットの
斜視図である。FIG. 1 is a partial cross-sectional view of an embodiment of the present invention and a perspective view of an auxiliary mat.
【図2】本発明の他の実施例の断面図である。FIG. 2 is a cross-sectional view of another embodiment of the invention.
【図3】本発明の別の実施例の断面図である。FIG. 3 is a cross-sectional view of another embodiment of the invention.
【図4】本発明の更に別の実施例の断面図である。FIG. 4 is a cross-sectional view of yet another embodiment of the invention.
【図5】従来の成形方法の説明図である。FIG. 5 is an explanatory diagram of a conventional molding method.
【図6】従来の成形方法の説明図である。FIG. 6 is an explanatory diagram of a conventional molding method.
1 上型
2 下型3 キャビテイ
4 ガラス繊維マット
5 補助マット
6 樹脂注入孔7 凹部1 Upper mold
2 Lower mold 3 Cavity
4 Glass fiber mat 5 Auxiliary mat
6 Resin injection hole 7 Recess
Claims (2)
形した繊維マットの端末周縁部を、該強化用繊維と同質
の繊維で予め断面コの字状に成形した補助マットで包み
込んで成形金型にセットし、該金型へ溶融樹脂を注入す
ることを特徴とする繊維強化樹脂成形方法。Claim 1: The terminal edge of a fiber mat in which reinforcing fibers have been preformed into a predetermined shape is wrapped with an auxiliary mat made of fibers of the same quality as the reinforcing fibers and preformed into a U-shaped cross section. A fiber reinforced resin molding method characterized by setting the resin in a mold and injecting molten resin into the mold.
なる強化用繊維で他の強化用繊維の端末周縁部を包むよ
うに予め所定形状に繊維マットを予備成形し、該繊維マ
ットを成形金型にセットし、該金型へ溶融樹脂を注入す
ることを特徴とする繊維強化樹脂成形方法。2. A fiber mat is preformed in advance into a predetermined shape so that the reinforcing fibers on the product surface side among the plurality of reinforcing fibers wrap the peripheral edges of the other reinforcing fibers, and the fiber mat is formed. A fiber reinforced resin molding method characterized by setting the resin in a mold and injecting molten resin into the mold.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03039360A JP3077213B2 (en) | 1991-02-08 | 1991-02-08 | Fiber reinforced resin molding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03039360A JP3077213B2 (en) | 1991-02-08 | 1991-02-08 | Fiber reinforced resin molding method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04257406A true JPH04257406A (en) | 1992-09-11 |
JP3077213B2 JP3077213B2 (en) | 2000-08-14 |
Family
ID=12550905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03039360A Expired - Lifetime JP3077213B2 (en) | 1991-02-08 | 1991-02-08 | Fiber reinforced resin molding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3077213B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006062038A1 (en) * | 2004-12-06 | 2006-06-15 | Toray Industries, Inc. | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin |
JP2006188050A (en) * | 2004-12-06 | 2006-07-20 | Toray Ind Inc | Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding |
WO2018029792A1 (en) * | 2016-08-09 | 2018-02-15 | 日産自動車株式会社 | Molding method for composite material and intermediate member for composite material |
GB2609219A (en) * | 2021-07-22 | 2023-02-01 | Aston Martin Lagonda Ltd | Method of manufacturing reinforced lightweight composites |
-
1991
- 1991-02-08 JP JP03039360A patent/JP3077213B2/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006062038A1 (en) * | 2004-12-06 | 2006-06-15 | Toray Industries, Inc. | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin |
JP2006188050A (en) * | 2004-12-06 | 2006-07-20 | Toray Ind Inc | Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding |
US8257823B2 (en) | 2004-12-06 | 2012-09-04 | Toray Industries, Inc. | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin |
US8491988B2 (en) | 2004-12-06 | 2013-07-23 | Toray Industries, Inc. | Molding precursor, process for producing molded fiber-reinforced resin, and molded fiber-reinforced resin |
WO2018029792A1 (en) * | 2016-08-09 | 2018-02-15 | 日産自動車株式会社 | Molding method for composite material and intermediate member for composite material |
US10800114B2 (en) | 2016-08-09 | 2020-10-13 | Nissan Motor Co., Ltd. | Molding method for composite material and intermediate member for composite material |
GB2609219A (en) * | 2021-07-22 | 2023-02-01 | Aston Martin Lagonda Ltd | Method of manufacturing reinforced lightweight composites |
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