JPH05200742A - Production of thermosetting resin molding material and of thermosetting resin molded product - Google Patents

Production of thermosetting resin molding material and of thermosetting resin molded product

Info

Publication number
JPH05200742A
JPH05200742A JP1347892A JP1347892A JPH05200742A JP H05200742 A JPH05200742 A JP H05200742A JP 1347892 A JP1347892 A JP 1347892A JP 1347892 A JP1347892 A JP 1347892A JP H05200742 A JPH05200742 A JP H05200742A
Authority
JP
Japan
Prior art keywords
molded product
thermosetting resin
molding material
molding
shape
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
Application number
JP1347892A
Other languages
Japanese (ja)
Other versions
JP2541064B2 (en
Inventor
Akiyoshi Kawasaki
秋由 河崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Corp
Original Assignee
Shin Kobe Electric Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Kobe Electric Machinery Co Ltd filed Critical Shin Kobe Electric Machinery Co Ltd
Priority to JP1347892A priority Critical patent/JP2541064B2/en
Publication of JPH05200742A publication Critical patent/JPH05200742A/en
Application granted granted Critical
Publication of JP2541064B2 publication Critical patent/JP2541064B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Reinforced Plastic Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To mold a thermosetting resin molded product having uniform density and strength expected at the beginning by preventing the remaining of strain in the molded prodduct at the time of the molding of the molded product having a three-dimensional shape to reduce the deformation of the molded product. CONSTITUTION:A phenol resin powder (particle size; 1-20mum) and a glass fiber (diameter; 9mum, fiber length; 6mm) are dispersed in water in a wt. ratio of 45/55. A net for molding is formed into a trough shape having a semicircular cross section and having a through-hole bored in the vicinity of the end part thereof and the aqueous dispersion is sucked from the inside of the net to form a molding material 1 having a trough shape having a hole 2 provided to the end part thereof. This molding material is charged in a mold and subjected to pressure molding under heating to form a trough-shaped molded product.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、熱硬化性樹脂成形材料
の製造法ならびにこの成形材料を用いた熱硬化性樹脂成
形品の製造法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a thermosetting resin molding material and a method for producing a thermosetting resin molded article using this molding material.

【0002】[0002]

【従来の技術】従来、熱硬化性樹脂成形材料としては、
次の二つがある。 シート状の基材に樹脂ワニスを含浸乾燥して、含浸し
た熱硬化性樹脂を半硬化状態(Bステージ)としたもの
(プリプレグ)。 熱硬化性樹脂とガラス繊維等の補強繊維とを混合混練
して粒状にしたもの。混合混練に際しては、充填材や添
加剤を必要に応じて配合する。 上記は、所定寸法に裁断したものを1枚または複数枚
重ねて加熱加圧成形する。また、は、射出成形や圧縮
(直圧)成形をして所定の成形品とする。
2. Description of the Related Art Conventionally, as thermosetting resin molding materials,
There are two things. A sheet-shaped base material is impregnated with a resin varnish and dried to make the impregnated thermosetting resin into a semi-cured state (B stage) (prepreg). A thermosetting resin and reinforcing fibers such as glass fibers are mixed and kneaded into particles. At the time of mixing and kneading, fillers and additives are blended as necessary. In the above, one or a plurality of pieces cut into a predetermined size are stacked and heat-pressed. Also, is molded into a predetermined molded product by injection molding or compression (direct pressure) molding.

【0003】[0003]

【発明が解決しようとする課題】上記を用いた成形で
は、成形品に反りやねじれの変形が発生しやすい。これ
は、長尺のシート状基材に樹脂ワニスを含浸乾燥し移送
する工程で、シート状基材には張力がかけられており、
この張力が歪みとしてプリプレグに残るからである。そ
して、シート状のプリプレグを用いて、三次元形状の成
形をすると成形品内部に残る歪みが一層大きくなる。ま
た、プリプレグを所定の成形品形状に沿わせることが難
しく、部分的に密度のバラツキが大きくなってしまう。
また、を用いた成形では、当初期待した成形品の強度
を得難い。これは、補強繊維を熱硬化性樹脂と混合混練
して成形材料とするとき、補強繊維が折れたり切れて短
くなってしまうからである。射出成形を行なうときに
は、成形機のシリンダのスクリューや金型のゲートで補
強繊維がさらに切断されるため、強度の低下がさらに大
きくなる。本発明が解決しようとする課題は、三次元形
状の成形品を成形するときに、成形品内部に歪みが残ら
ないようにして変形を小さくし、密度も均一な熱硬化性
樹脂成形品を成形できるようにすることであり、かつ、
その強度も当初期待した強度が得られるようにすること
である。
In the molding using the above, a warped or twisted deformation is likely to occur in the molded product. This is a process of impregnating and drying a resin varnish on a long sheet-shaped substrate, and the sheet-shaped substrate is tensioned.
This is because this tension remains as strain in the prepreg. When a sheet-like prepreg is used to form a three-dimensional shape, the strain remaining inside the molded product is further increased. Further, it is difficult to make the prepreg conform to the predetermined shape of the molded product, and the variation in the density becomes large locally.
Further, in the molding using, it is difficult to obtain the initially expected strength of the molded product. This is because when the reinforcing fiber is mixed and kneaded with the thermosetting resin to form a molding material, the reinforcing fiber is broken or cut to be short. When the injection molding is performed, the reinforcing fiber is further cut by the screw of the cylinder of the molding machine or the gate of the mold, so that the decrease in strength is further increased. The problem to be solved by the present invention is to form a thermosetting resin molded product having a uniform density even when molding a molded product having a three-dimensional shape so that distortion is not left inside the molded product and deformation is reduced. To be able to, and
The strength is to obtain the strength initially expected.

【0004】[0004]

【課題を解決するための手段】上記課題を解決するため
に、本発明に係る方法では、熱硬化性樹脂粉末と補強繊
維を必須成分としてこれらを液中に分散させ、抄造によ
り所定の成形品に近似した三次元形状の成形材料とす
る。また、この成形材料を所定形状の金型に投入して加
熱加圧成形して成形品とするものである。成形品が穴を
有する形状であるときは、穴あき形状に抄造するとよ
い。
In order to solve the above-mentioned problems, in the method according to the present invention, thermosetting resin powder and reinforcing fibers are dispersed as essential components in a liquid, and a predetermined molded product is produced by papermaking. The molding material has a three-dimensional shape similar to the above. Further, this molding material is put into a mold having a predetermined shape and heated and pressed to obtain a molded product. When the molded product has a shape having holes, it is preferable to make the paper into a shape with holes.

【0005】[0005]

【作用】本発明に係る方法では、液中に分散した熱硬化
性樹脂と補強繊維から所定の成形品に近似した三次元形
状の成形材料が抄造により作られるので、シート状基材
に樹脂ワニスを含浸乾燥する場合のように張力が働いて
おらず、得られた成形材料に歪みが残らない。そして、
成形材料の金型への投入作業もしやすいし、成形品を金
型形状に沿わせるときに無理な力が働かないので、成形
品に内部歪みが残りにくく密度も均一になる。また、前
記抄造による方法では、補強繊維が従来の混合混練の場
合のように外力で折れることがなく、初期の繊維長を殆
どそのまま保つことができる。さらに、液中に分散して
いる補強繊維を抄造するので、補強繊維は特別な方向に
配向することはなく、補強繊維と熱硬化性樹脂粉末が均
一に分散した成形材料となる。このような結果、この成
形材料を加熱加圧成形した成形品は、期待通りの強度を
保持し、強度の方向性や変形がなくなる。
In the method according to the present invention, a thermosetting resin dispersed in a liquid and a reinforcing fiber are used to produce a molding material having a three-dimensional shape similar to a predetermined molded article by papermaking. The tension does not work as in the case of impregnating and drying, and no distortion remains in the obtained molding material. And
It is easy to put the molding material into the mold, and because no unreasonable force is applied when the molded product is made to follow the mold shape, internal distortion is less likely to remain in the molded product and the density becomes uniform. Further, in the method by the above-mentioned papermaking, the reinforcing fibers are not broken by an external force as in the case of the conventional mixing and kneading, and the initial fiber length can be maintained almost as it is. Further, since the reinforcing fibers dispersed in the liquid are manufactured into paper, the reinforcing fibers are not oriented in a particular direction, and a molding material in which the reinforcing fibers and the thermosetting resin powder are uniformly dispersed is obtained. As a result, the molded product obtained by heat-pressing and molding this molding material retains the expected strength and loses the directionality and deformation of the strength.

【0006】[0006]

【実施例】本発明に係る方法を実施するに当たり、熱硬
化性樹脂粉末は、フェノール樹脂、エポキシ樹脂、ポリ
イミド等である。熱硬化性樹脂粉末の粒径は、1〜10
0μmが適当であるが、抄造するときに分散させること
ができれば特に限定するものではない。補強繊維は、ガ
ラス繊維、アラミド繊維、ステンレス繊維等繊維状のも
のであれば特に限定しない。抄造に際しては、他の充填
材や添加剤を適宜配合してもよい。
EXAMPLES In carrying out the method according to the present invention, the thermosetting resin powder is phenol resin, epoxy resin, polyimide or the like. The particle size of the thermosetting resin powder is 1 to 10
0 μm is suitable, but it is not particularly limited as long as it can be dispersed at the time of papermaking. The reinforcing fibers are not particularly limited as long as they are fibrous such as glass fibers, aramid fibers, and stainless fibers. At the time of papermaking, other fillers and additives may be appropriately mixed.

【0007】実施例1 フェノール樹脂粉末(粒径1〜20μm)とガラス繊維
(径9μm,繊維長6mm)を重量比で45/55の割合
で水に分散させ、これを抄造し乾燥した。抄造のための
網を断面半円形(径100mm)の樋状で端部付近に貫通
穴(径10mm)をあけた形状とし網の内側から吸引しな
がら抄造して、図1に示すように、樋状で端部に穴1の
ある形状の成形材料2とした(長さ250mm,厚さ12
mm)。この場合、抄造中に補強繊維や熱硬化性樹脂粉末
が網に早く付着して厚さの厚くなった部分では抵抗が大
きくなって分散液の通過量が減り、未だ付着量が少ない
厚さの薄い部分では抵抗が小さいので、この部分に分散
液の流れが集中する。結局、均一な厚さの成形材料とす
ることができる。尚、前記乾燥は、フェノール樹脂の硬
化反応が進まない温度範囲(常温)で行なった。この成
形材料を金型に投入し、加熱加圧成形により樋状の成形
品とした(断面径100mm,長さ250mm,厚さ2m
m)。成形品からの切出し試験片によるその特性を表1
に示す。本実施例では、抄造時に予め穴を形成した成形
材料を用いている。若干工程が増えるものの、抄造後に
打抜き加工により穴を形成した成形材料を用いてもよ
い。打抜きでできた成形に不必要な部分は、液中に浸漬
すると補強繊維がほぐれるので再度抄造に供することが
できる。プリプレグを所定形状に打抜いてできた成形に
不必要な部分が再使用できないのに比べて、資源節約上
極めて有利である。
Example 1 Phenolic resin powder (particle diameter 1 to 20 μm) and glass fiber (diameter 9 μm, fiber length 6 mm) were dispersed in water at a weight ratio of 45/55, and the paper was made and dried. The net for papermaking has a gutter shape with a semicircular cross section (diameter 100 mm) and has a through hole (diameter 10 mm) near the end, and the paper is drawn while sucking from the inside of the net, as shown in FIG. A molding material 2 having a gutter shape and a hole 1 at the end (length 250 mm, thickness 12)
mm). In this case, during the papermaking process, the reinforcing fibers and the thermosetting resin powder adhered to the net earlier to increase the thickness, and the resistance increased and the amount of the dispersion liquid passed decreased. Since the resistance is small in the thin part, the flow of the dispersion liquid concentrates in this part. After all, a molding material having a uniform thickness can be obtained. The drying was performed in a temperature range (normal temperature) where the curing reaction of the phenol resin did not proceed. This molding material was put into a metal mold and heated and pressed to form a gutter-shaped molded product (section diameter 100 mm, length 250 mm, thickness 2 m).
m). Table 1 shows the characteristics of cut test pieces from molded products.
Shown in. In this embodiment, a molding material in which holes are formed in advance during papermaking is used. Although the number of steps is slightly increased, a molding material in which holes are formed by punching after papermaking may be used. The portion which is not necessary for molding and formed by punching can be reused for papermaking because the reinforcing fiber is unraveled when immersed in the liquid. This is extremely advantageous in terms of resource saving, as compared with the fact that a portion unnecessary for molding which is formed by punching a prepreg into a predetermined shape cannot be reused.

【0008】従来例1 長尺のガラス繊維不織布を移送しながらフェノール樹脂
ワニスを含浸乾燥し、樹脂含有量45重量%のプリプレ
グとした。所定形状に裁断した前記プリプレグを13枚
重ねて加熱加圧成形し、実施例1と同寸法形状の成形品
とした。その特性を表1に示す。本例では、フェノール
樹脂ワニスの含浸性の問題から薄いガラス不織布を使用
しており、実施例1と同一厚さの成形品を得るためにプ
リプレグを多数枚重ねて成形している。プリプレグを重
ねた界面が多くできることから実施例より強度が低くな
っている。また、変形が極めて大きく密度も不均一であ
る。
Conventional Example 1 Phenolic resin varnish was impregnated and dried while transferring a long glass fiber nonwoven fabric to obtain a prepreg having a resin content of 45% by weight. Thirteen sheets of the prepreg cut into a predetermined shape were stacked and heat-pressed to obtain a molded product having the same size and shape as in Example 1. The characteristics are shown in Table 1. In this example, a thin glass non-woven fabric is used due to the problem of impregnation with the phenol resin varnish, and in order to obtain a molded product having the same thickness as in Example 1, a large number of prepregs are stacked and molded. Since the number of interfaces where prepregs are stacked can be increased, the strength is lower than that of the example. In addition, the deformation is extremely large and the density is non-uniform.

【0009】従来例2 フェノール樹脂とガラス繊維(径9μm,繊維長6mm)
を実施例1と同じ配合割合で混合混練し、粒状の成形材
料とした。この成形材料を用い、実施例1の金型に投入
して同様に樋状の成形品とした。成形品からの切出し試
験片によるその特性を表1に示す。尚、この場合、成形
材料を金型中に均一に投入するのが難しかった。
Conventional Example 2 Phenolic resin and glass fiber (diameter 9 μm, fiber length 6 mm)
Was mixed and kneaded at the same mixing ratio as in Example 1 to obtain a granular molding material. Using this molding material, it was put into the mold of Example 1 to obtain a gutter-shaped molded product in the same manner. The characteristics of the cut-out test pieces from the molded product are shown in Table 1. In this case, it was difficult to uniformly put the molding material into the mold.

【0010】従来例3 従来例2における成形材料を射出成形し、実施例1と同
様の成形品とした。成形品からの切出し試験片によるそ
の特性を表1に示す。尚、この場合、穴形成部分にウエ
ルドが発生した。
Conventional Example 3 The molding material of Conventional Example 2 was injection molded to obtain a molded article similar to that of Example 1. The characteristics of the cut-out test pieces from the molded product are shown in Table 1. In this case, a weld was generated in the hole forming portion.

【0011】比較例1 実施例1の抄造において、成形品の形状に近似した三次
元形状とせず平らなシート状の成形材料とした(厚さ1
2mm)。これを1枚重ねて加熱加圧成形し、実施例1と
同寸法形状の成形品とした。その特性を表1に示す。
Comparative Example 1 In the papermaking of Example 1, a flat sheet-shaped molding material was used instead of a three-dimensional shape similar to the shape of the molded product (thickness 1
2 mm). One piece of this was stacked and heat-pressed to obtain a molded product having the same size and shape as in Example 1. The characteristics are shown in Table 1.

【0012】[0012]

【表1】 [Table 1]

【0013】表1において、反りは、定盤上に成形品を
置き、成形品の角部の定盤からの浮き上がり量を隙間ゲ
ージで測定した。
In Table 1, the warp was measured by placing a molded product on a surface plate and measuring the amount of lift of the corner of the molded product from the surface plate with a gap gauge.

【0014】[0014]

【発明の効果】上述のように、本発明に係る方法では、
熱硬化性樹脂粉末と補強繊維とを必須成分として抄造に
より所定の成形品形状に近似した三次元形状の成形材料
を作ったので、この成形材料には歪みが残っておらず補
強繊維の繊維長も当初の長さを保持しており、補強繊維
と熱硬化性樹脂が均一に分散している。この成形材料を
金型に投入する作業は簡単であり、成形材料を金型形状
に沿わせるときにも無理な力が働かない。これらの結果
により、成形後に成形品内部に歪みが残らないので変形
が小さく密度が均一で、かつ、強度の大きな熱硬化性樹
脂成形品とすることができる。また、この成形材料は、
成形に不必要な部分を打抜き加工等で除き、当該部分は
再度抄造に供することができるので資源の節約上都合が
よい。抄造時に穴を形成すれば、前記打抜き加工の工程
が不要であり、製造工程が簡略化される。
As described above, according to the method of the present invention,
Since a molding material having a three-dimensional shape that approximates the shape of a predetermined molded product was made by papermaking using thermosetting resin powder and reinforcing fiber as essential components, no distortion remains in this molding material and the fiber length of the reinforcing fiber Retains its original length, and the reinforcing fibers and thermosetting resin are uniformly dispersed. The work of putting the molding material into the mold is simple, and no undue force is applied when the molding material is made to follow the mold shape. From these results, since no distortion remains inside the molded product after molding, it is possible to obtain a thermosetting resin molded product having a small deformation, a uniform density, and a high strength. In addition, this molding material
It is convenient in terms of resource saving because the portion unnecessary for molding can be removed by punching or the like and the portion can be subjected to papermaking again. If the holes are formed at the time of papermaking, the punching process is not required, and the manufacturing process is simplified.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る成形材料の一例を示す斜
視図である。
FIG. 1 is a perspective view showing an example of a molding material according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1は穴 2は成形材料 1 is hole 2 is molding material

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 B29K 105:08 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B29K 105: 08

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】熱硬化性樹脂粉末と補強繊維を必須成分と
してこれらを液中に分散させ、抄造により所定の成形品
に近似した三次元形状とすることを特徴とする熱硬化性
樹脂成形材料の製造法。
1. A thermosetting resin molding material comprising a thermosetting resin powder and reinforcing fibers as essential components, which are dispersed in a liquid to form a three-dimensional shape approximate to a predetermined molded product by papermaking. Manufacturing method.
【請求項2】所定の成形品に近似した三次元形状が穴を
有する形状であることを特徴とする請求項1に記載の熱
硬化性樹脂成形材料の製造法。
2. The method for producing a thermosetting resin molding material according to claim 1, wherein the three-dimensional shape approximate to a predetermined molded product is a shape having holes.
【請求項3】熱硬化性樹脂粉末と補強繊維を必須成分と
してこれらを液中に分散させ、抄造により所定の成形品
に近似した三次元形状とした成形材料を加熱加圧成形す
ることを特徴とする熱硬化性樹脂成形品の製造法。
3. A thermosetting resin powder and a reinforcing fiber as essential components are dispersed in a liquid, and a molding material having a three-dimensional shape similar to a predetermined molded article is formed by heating and press molding. And a method for producing a thermosetting resin molded product.
【請求項4】所定の成形品に近似した三次元形状が穴を
有する形状であることを特徴とする請求項3に記載の熱
硬化性樹脂成形品の製造法。
4. The method for producing a thermosetting resin molded product according to claim 3, wherein the three-dimensional shape approximate to the predetermined molded product is a shape having holes.
JP1347892A 1992-01-29 1992-01-29 Method for producing thermosetting resin molding material and method for producing thermosetting resin molded article Expired - Fee Related JP2541064B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1347892A JP2541064B2 (en) 1992-01-29 1992-01-29 Method for producing thermosetting resin molding material and method for producing thermosetting resin molded article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1347892A JP2541064B2 (en) 1992-01-29 1992-01-29 Method for producing thermosetting resin molding material and method for producing thermosetting resin molded article

Publications (2)

Publication Number Publication Date
JPH05200742A true JPH05200742A (en) 1993-08-10
JP2541064B2 JP2541064B2 (en) 1996-10-09

Family

ID=11834234

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005096173A (en) * 2003-09-24 2005-04-14 Toray Ind Inc Manufacturing method of fiber reinforced resin composite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005096173A (en) * 2003-09-24 2005-04-14 Toray Ind Inc Manufacturing method of fiber reinforced resin composite
JP4524481B2 (en) * 2003-09-24 2010-08-18 東レ・デュポン株式会社 Manufacturing method of fiber reinforced resin composite

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