JPH07293613A - Manufacture of brake frictional member - Google Patents
Manufacture of brake frictional memberInfo
- Publication number
- JPH07293613A JPH07293613A JP6088570A JP8857094A JPH07293613A JP H07293613 A JPH07293613 A JP H07293613A JP 6088570 A JP6088570 A JP 6088570A JP 8857094 A JP8857094 A JP 8857094A JP H07293613 A JPH07293613 A JP H07293613A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- prepreg
- shape
- divided
- carbon 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.)
- Withdrawn
Links
Landscapes
- Braking Arrangements (AREA)
- Ceramic Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、炭素繊維強化炭素複合
材料からなるブレーキ摩擦材の製造方法に関し、特に、
中空円形状の摩擦材の製造において調製されるプリプレ
グをより高い歩留りで使用できる方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a brake friction material made of carbon fiber reinforced carbon composite material, and more particularly,
The present invention relates to a method in which a prepreg prepared in the production of a hollow circular friction material can be used with a higher yield.
【０００２】[0002]
【従来の技術】炭素繊維強化炭素複合材料からなるブレ
ーキ用摩擦材を製造するに際し、以下のように炭素繊維
が使用される。2. Description of the Related Art In producing a friction material for a brake made of a carbon fiber reinforced carbon composite material, carbon fiber is used as follows.
【０００３】まず、織布状の炭素繊維を強化繊維として
用いる場合、摩擦材の大きさに合わせた形状の炭素繊維
織布が積層される。したがって、中空円筒形（ドーナツ
形）の摩擦材を形成する場合、それに合わせたドーナツ
形の織布が積層される。First, when woven cloth-like carbon fibers are used as the reinforcing fibers, carbon fiber woven cloths having a shape adapted to the size of the friction material are laminated. Therefore, when forming the hollow cylindrical (donut-shaped) friction material, the doughnut-shaped woven fabric matching it is laminated.
【０００４】一方、炭素繊維について短繊維を用いる場
合、繊維をランダムに配向させることも試みられている
（特開昭５８−３０５３７）。また、短繊維を、摩擦材
の摺動面に対して角度を持たせて配向させたものも開示
されている（特開平３−１９４２２７）。さらに、短繊
維に摺動面に対して角度を持たせて配向させた材料にお
いて、その外周部および内周部を、回旋配置した長繊維
で補強したものも開示される（特開平３−１９４２２
８）。On the other hand, when short fibers are used as the carbon fibers, it has been attempted to randomly orient the fibers (Japanese Patent Laid-Open No. 58-30537). Further, there is also disclosed that short fibers are oriented at an angle with respect to the sliding surface of the friction material (Japanese Patent Laid-Open No. 3-194227). Further, a material in which short fibers are oriented at an angle with respect to a sliding surface, and the outer peripheral portion and the inner peripheral portion thereof are reinforced by long fibers arranged in a convoluted manner is also disclosed (Japanese Patent Laid-Open No. 194222/1993).
8).
【０００５】[0005]
【発明が解決しようとする課題】炭素繊維について短繊
維を用いた摩擦材は、長繊維を用いた摩擦材に比較し
て、剪断強度、引張強度、曲げ強度が劣る。また、その
欠点を補うため、摩擦材の外周部または内周部に長繊維
を旋回配置した場合には、焼成中に短繊維の部分と長繊
維の部分の界面において、剥がれが生じるという問題も
存在する。Regarding the carbon fiber, the friction material using short fibers is inferior in shear strength, tensile strength and bending strength as compared with the friction material using long fibers. Further, in order to make up for the drawback, when the long fibers are arranged in a swirling manner on the outer peripheral portion or the inner peripheral portion of the friction material, there is a problem that peeling occurs at the interface between the short fiber portion and the long fiber portion during firing. Exists.
【０００６】長繊維を用いた場合、引張強度および曲げ
強度は問題がないが、剪断強度に劣る場合がある。剪断
強度に劣る場合、高速、高負荷で摩擦材を使用すると剥
離摩耗が起こる。When long fibers are used, the tensile strength and bending strength are satisfactory, but the shear strength may be inferior. When the shear strength is inferior, peeling wear occurs when a friction material is used at high speed and high load.
【０００７】一方、長繊維すなわち織布を用いる場合、
短繊維を用いる場合に比べて使用する炭素繊維の歩留り
が悪くなる。炭素繊維織布の形状は、一般に長方形であ
り、それを中空円筒形の摩擦材に用いようとすれば、同
じ形状に切断しなければならないからである。切断を行
なった際の切れ端は廃棄せざるを得ない。On the other hand, when using long fibers, that is, woven fabric,
The yield of the carbon fibers used is worse than when using short fibers. This is because the carbon fiber woven fabric is generally rectangular in shape, and if it is used for a hollow cylindrical friction material, it must be cut into the same shape. The cut pieces after cutting have to be discarded.
【０００８】本発明の目的は、長繊維すなわち炭素繊維
織布を用いて摩擦材に十分な強度を保持させながら、使
用する炭素繊維の歩留りがより高いブレーキ摩擦材の製
造方法を提供することにある。It is an object of the present invention to provide a method for producing a brake friction material which uses a long fiber, that is, a carbon fiber woven cloth, while maintaining sufficient strength in the friction material, and in which the yield of carbon fiber used is higher. is there.
【０００９】[0009]
【課題を解決するための手段】本発明の製造方法は、炭
素繊維強化炭素複合材料からなる中空円筒形状のブレー
キ摩擦材を製造するための方法であって、炭素繊維織布
にマトリックスとしての炭素を付着させたプリプレグを
調製する工程と、得られたプリプレグを切断して、摩擦
材用部材を形成する工程と、得られた摩擦材用部材を積
層したものについて、成形および焼結を施す工程とを備
える。このような方法において、本発明は、上記プリプ
レグを切断して得られる摩擦材用部材に、摩擦材の形状
に沿った中空円形を分割した形状のものが含まれてお
り、摩擦材用部材を積層するに際し、この分割した形状
の部材を集めて配置し、中空円形の配置を構成すること
を特徴とする。The manufacturing method of the present invention is a method for manufacturing a hollow cylindrical brake friction material made of a carbon fiber reinforced carbon composite material, which comprises carbon as a matrix in a carbon fiber woven cloth. A step of preparing a prepreg having adhered thereto, a step of cutting the obtained prepreg to form a member for friction material, and a step of forming and sintering a laminate of the obtained members for friction material With. In such a method, the present invention includes a member for a friction material obtained by cutting the prepreg, which has a shape obtained by dividing a hollow circle along the shape of the friction material. When stacking, the members having the divided shapes are collected and arranged to form a hollow circular arrangement.
【００１０】本発明において、分割した形状の部材を集
めて配置するに際し、隣合う部材同士を部分的に重ね合
わせることができる。また、分割した形状の部材は、上
記中空円形の４等分以下の大きさであることが好まし
い。具体的に、上記摩擦材用部材は、上記中空円形のも
のと、上記中空円形のものをｘ等分（ｘは４以上の整
数）したものとから構成することができる。積層時にお
いて、中空円形のものとｘ等分したものとが重ねられ
る。一方、摩擦材用部材は、中空円形をｘ等分（ｘは４
以上の整数）したものからなることができる。In the present invention, when the members having the divided shapes are collected and arranged, the adjacent members can be partially overlapped with each other. Further, it is preferable that the divided members have a size equal to or smaller than four equal parts of the hollow circle. Specifically, the friction material member can be composed of the hollow circular member and the hollow circular member divided into x equal parts (x is an integer of 4 or more). At the time of stacking, the hollow circular shape and the x-divided shape are stacked. On the other hand, for the friction material member, the hollow circle is divided into x equal parts (x is 4
Can be any of the above integers).
【００１１】以下に、ドーナツ形を分割した形状のプリ
プレグを準備し、それを集めて積層する具体例を図を参
照しながら説明する。A specific example of preparing a prepreg having a donut shape divided and collecting and stacking the prepreg will be described below with reference to the drawings.
【００１２】図１（ａ）は、ドーナツ形状のものを６等
分した形状の６つのプリプレグ１を示している。本発明
では、炭素繊維織布にマトリックスとしての炭素を付着
させたプリプレグ、たとえば長方形のプリプレグから、
このような形のプリプレグ（摩擦材用部材）を切断によ
り得る。分割された形のプリプレグは、長方形のプリプ
レグからドーナツ形のプリプレグを形成し、それを切断
して得るのではなく、長方形のプリプレグから直接切断
により得るのである。このように、ドーナツ形のプリプ
レグを形成する代わりに、それを分割した形のプリプレ
グを切断によって得れば、裁断によって生じる切れ端の
量をより少なくし、炭素繊維の歩留りを向上させること
ができる。分割をより小さくしていけば、より歩留りを
向上させることができると考えられるが、一方で、織布
としての形状が損なわれ、強度の低下につながるので、
たとえばドーナツ形をｘ等分する場合、４等分〜２０等
分が好ましく、８等分〜１６等分がより好ましい。FIG. 1A shows six prepregs 1 each having a donut shape divided into six equal parts. In the present invention, a prepreg in which carbon as a matrix is attached to a carbon fiber woven fabric, for example, a rectangular prepreg,
A prepreg (a friction material member) having such a shape is obtained by cutting. The divided shape prepreg is obtained by directly cutting from the rectangular prepreg instead of forming the donut-shaped prepreg from the rectangular prepreg and cutting it. Thus, instead of forming a donut-shaped prepreg, if a divided prepreg is obtained by cutting, the amount of cut edges produced by cutting can be further reduced, and the yield of carbon fibers can be improved. It is thought that if the division is made smaller, the yield can be further improved, but on the other hand, the shape of the woven fabric is impaired and the strength is reduced.
For example, when the donut shape is divided into x equal parts, 4 to 20 equal parts are preferable, and 8 to 16 equal parts are more preferable.
【００１３】図１（ｂ）に示すように、分割した形状の
プリプレグ１は、積層時に集められ、ドーナツ形状に配
置される。このようにして、複数のプリプレグからなる
ドーナツ形を積層し、加圧成形および焼結を施すことに
よって強度の高い摩擦材を得ることができる。また、積
層時において、ドーナツ形を構成するプリプレグの境界
線が、上層と下層の間でずれていることが望ましい。As shown in FIG. 1B, the divided prepregs 1 are collected at the time of lamination and arranged in a donut shape. In this way, a doughnut-shaped product made up of a plurality of prepregs is laminated, pressure-molded and sintered to obtain a friction material having high strength. Further, it is desirable that the boundary line of the prepreg forming the donut shape is deviated between the upper layer and the lower layer during stacking.
【００１４】図２は、分割した形状のプリプレグ１１を
ドーナツ形に配置するに際し、隣合うプリプレグ１１を
部分的に重ねて配置する例を示している。この場合、プ
リプレグ１１のほぼ半分がお互いに重なっており、計１
２枚のプリプレグからドーナツ形が構成されている。こ
のようなドーナツ形を積層して、成形および焼結により
摩擦材を作成することができる。FIG. 2 shows an example in which adjacent prepregs 11 are partially overlapped when the divided prepregs 11 are arranged in a donut shape. In this case, almost half of the prepregs 11 overlap each other, and a total of 1
A donut shape is composed of two prepregs. Such a donut shape can be laminated, and a friction material can be created by molding and sintering.
【００１５】図３は、分割した形状のプリプレグを集め
てドーナツ形としたもの２１ａ、２１ｂの間に、ドーナ
ツ形のプリプレグ２２を挟み込む様子を模式的に示して
いる。積層において、このような態様を用いてもよい。
ドーナツ形のプリプレグをところどころ用いることは、
高い強度の摩擦材を得る上で好ましい。FIG. 3 schematically shows a state in which a donut-shaped prepreg 22 is sandwiched between doughnut-shaped ones 21a and 21b in which divided prepregs are collected. Such a mode may be used in the lamination.
Using doughnut-shaped prepreg in some places
It is preferable for obtaining a high-strength friction material.
【００１６】なお、以上ではドーナツ形のプリプレグを
等分したものについて説明したが、ドーナツ形の分割の
態様は任意であり、たとえば図４に示すように、等分で
ない分割も炭素繊維の歩留りを向上させる範囲において
任意に行なうことができる。Although the donut-shaped prepreg is divided into equal parts in the above description, the donut-shaped division mode is arbitrary. For example, as shown in FIG. 4, the carbon fiber yield is not even divided. It can be arbitrarily performed within the range of improvement.
【００１７】[0017]
【作用】プリプレグとしてドーナツ形を分割したものを
積層することによって、切断部からはみ出してきた炭素
繊維が、その上下に位置するプリプレグに絡み合うた
め、剪断強度が向上する。特に、隣合うプリプレグ同士
を重なり合わせると、絡み合う間隔が狭くなるため、剪
断強度の向上効果はより大きくなる。したがって、剪断
強度のみを考えると、分割した形状のものを順々に、た
とえばらせん階段状に重ね合わせる方が、効果が大き
く、プリプレグが小さい方が、絡み合う間隔が小さくな
り、剪断強度は大きくなる。しかしながら、プリプレグ
が小さくなりすぎると、繊維の長さが短くなりすぎて、
引張強度および曲げ強度が低下する。このため、剪断強
度と引張強度および曲げ強度とをバランスさせるような
繊維長にする必要がある。By stacking the doughnut-shaped divided prepregs, the carbon fibers protruding from the cut portion are entangled with the prepregs located above and below the cut portion, so that the shear strength is improved. In particular, when adjacent prepregs are overlapped with each other, the interval at which they are entangled becomes narrower, so that the effect of improving the shear strength becomes greater. Therefore, considering only the shear strength, it is more effective to stack the divided shapes one after another, for example, in a spiral staircase shape, and the smaller the prepreg, the smaller the entanglement interval and the greater the shear strength. . However, if the prepreg becomes too small, the fiber length becomes too short,
Tensile strength and bending strength decrease. Therefore, it is necessary to make the fiber length to balance the shear strength with the tensile strength and the bending strength.
【００１８】また、高速で回転するブレーキとして本発
明により製造された摩擦材を使用する場合、円周方向の
引張強度を維持するため、分割していないドーナツ形状
のものを積層することが好ましい。ドーナツ形状のもの
をところどころ積層すれば、引張強度の面で好ましい摩
擦材が得られる。プリプレグに使用する織布として上述
したような分割したものを使用すると、切れ端として廃
棄する部分が少なくなり、炭素繊維の歩留りは向上す
る。特に、その大きさについて、剪断強度および歩留り
を考慮すると、ドーナツ形状の４等分以下の大きさがよ
り有利である。When the friction material manufactured according to the present invention is used as a brake that rotates at a high speed, it is preferable to stack undivided donut shapes in order to maintain tensile strength in the circumferential direction. By laminating the doughnut-shaped ones in places, a friction material preferable in terms of tensile strength can be obtained. When the woven cloth used for the prepreg is divided as described above, the portion discarded as scraps is reduced, and the yield of carbon fibers is improved. Particularly, considering the shear strength and the yield, the size of the donut-shaped quadrant or less is more advantageous.
【００１９】[0019]
実施例１ ＰＡＮ系炭素繊維織布（６Ｋ、８朱子織）を用いて、電
着法で自己焼結性炭素粉末をマトリックスとしたプリプ
レグ（１０００ｍｍ×３５０ｍｍ）を調製した。Example 1 A prepreg (1000 mm × 350 mm) using a self-sintering carbon powder as a matrix was prepared by an electrodeposition method using a PAN-based carbon fiber woven fabric (6K, 8 satin weave).
【００２０】得られた長方形のプリプレグを切断して、
外径３００ｍｍ内径１５０ｍｍのドーナツ形を８等分し
た大きさおよび形状のものを多数形成した。切断により
得られたプリプレグを１６枚でドーナツ形状になるよう
に並べ、このようにしてドーナツ形状に並べたものを積
層していった。積層体を２００℃で３０分間、５ＭＰａ
の圧力で加圧成形し、次いで２０００℃で３０ＭＰａに
おいて加圧焼結して、ドーナツ形の炭素繊維強化炭素複
合材料を得た。得られた材料の剪断強度は２１ＭＰａ、
曲げ強度は１２０ＭＰａであった。得られた材料を自動
車用ロータディスクの形状に加工し、摩擦試験を実施し
た。The obtained rectangular prepreg is cut,
A large number of doughnut-shaped pieces having an outer diameter of 300 mm and an inner diameter of 150 mm were divided into eight equal parts. Sixteen prepregs obtained by cutting were arranged so as to have a donut shape, and the prepregs thus arranged were stacked. Laminated body at 200 ° C. for 30 minutes, 5 MPa
Then, it was pressure-molded at a pressure of, and then pressure-sintered at 2000 ° C. at 30 MPa to obtain a donut-shaped carbon fiber reinforced carbon composite material. The resulting material has a shear strength of 21 MPa,
The bending strength was 120 MPa. The obtained material was processed into the shape of an automobile rotor disk, and a friction test was carried out.
【００２１】実施例２ ＰＡＮ系炭素繊維織布（６Ｋ、８朱子織）を用いて、電
着法で自己焼結性炭素粉末をマトリックスとしたプリプ
レグ（１０００ｍｍ×３５０ｍｍ）を製作した。Example 2 Using a PAN-based carbon fiber woven fabric (6K, 8 satin weave), a prepreg (1000 mm × 350 mm) using a self-sintering carbon powder as a matrix was produced by an electrodeposition method.
【００２２】得られた長方形のプリプレグを切断して、
外径３００ｍｍ内径１５０ｍｍのドーナツ形状のもの、
およびこのドーナツ形状のものを４等分した大きさおよ
び形状のものを形成した。４等分した形状のプリプレグ
を４枚でドーナツ形状になるように並べ、これを２セッ
トに対して、ドーナツ形状のプリプレグを１枚の割合で
積層した。積層体を２００℃で３０分間、５ＭＰａで加
圧成形し、次いで２０００℃で３０ＭＰａにおいて加圧
焼結した。その結果、ドーナツ形状の炭素繊維強化炭素
複合材料が得られた。得られた材料の剪断強度は１７Ｍ
Ｐａ、曲げ強度は１４０ＭＰａであった。得られた材料
を自動車用ロータディスクの形状に加工し、摩擦試験を
実施した。The obtained rectangular prepreg is cut,
A donut shape with an outer diameter of 300 mm and an inner diameter of 150 mm,
And, the doughnut-shaped one was divided into four parts to form a size and shape. Four prepregs each having a quarter shape were arranged in a donut shape, and one set of donut-shaped prepregs was laminated to two sets of the prepregs. The laminate was pressure molded at 200 ° C. for 30 minutes at 5 MPa, and then pressure sintered at 2000 ° C. at 30 MPa. As a result, a doughnut-shaped carbon fiber reinforced carbon composite material was obtained. Shear strength of the obtained material is 17M
Pa and bending strength were 140 MPa. The obtained material was processed into the shape of an automobile rotor disk, and a friction test was carried out.
【００２３】比較例 ＰＡＮ系炭素繊維織布（６Ｋ、８朱子織）を用いて、電
着法で自己焼結性炭素粉末をマトリックスとしたプリプ
レグ（１０００ｍｍ×３５０ｍｍ）を作製した。Comparative Example A prepreg (1000 mm × 350 mm) using a self-sintering carbon powder as a matrix was prepared by electrodeposition using a PAN-based carbon fiber woven fabric (6K, 8 satin weave).
【００２４】得られた長方形のプリプレグを外径３００
ｍｍ内径１５０ｍｍのドーナツ形状に切り取った。この
ような切取りにより得られたドーナツ形状のプリプレグ
を積層した。積層体を２００℃で３０分間、５ＭＰａに
おいて加圧成形し、次いで２０００℃で３０ＭＰａにお
いて加圧焼結して、ドーナツ形の炭素繊維強化炭素複合
材料を得た。得られた材料の剪断強度は１５ＭＰａ、曲
げ強度は１７０ＭＰａであった。得られた材料を自動車
用ロータディスクの形状に加工し摩擦試験を実施した。The obtained rectangular prepreg was treated with an outer diameter of 300
It was cut into a donut shape having an inner diameter of 150 mm. The doughnut-shaped prepregs obtained by such cutting were laminated. The laminate was pressure-molded at 200 ° C. for 30 minutes at 5 MPa, and then pressure-sintered at 2000 ° C. at 30 MPa to obtain a donut-shaped carbon fiber-reinforced carbon composite material. The obtained material had a shear strength of 15 MPa and a bending strength of 170 MPa. The obtained material was processed into the shape of an automobile rotor disk and a friction test was carried out.
【００２５】以上の結果、摩擦性能においては、実施例
と比較例の間で顕著な差は認められなかった。しかしな
がら、織布の使用量を比較すると、実施例１は、比較例
に対して５８％、実施例２は、比較例に対して２２％、
織布使用量を低減できた。As a result of the above, no significant difference in friction performance was observed between the examples and the comparative examples. However, comparing the amount of woven fabric used, Example 1 was 58% compared to Comparative Example, Example 2 was 22% compared to Comparative Example,
The amount of woven fabric used could be reduced.
【００２６】[0026]
【発明の効果】以上説明したとおり、本発明によって、
摩擦特性を悪化させることなく、高い剪断強度を有する
摩擦材をより低コストで製造することができる。As described above, according to the present invention,
A friction material having high shear strength can be manufactured at a lower cost without deteriorating the friction characteristics.
【図１】本発明に従って、ドーナツ形を分割した形状の
プリプレグを準備し、それを配置する様子を示す模式図
である。FIG. 1 is a schematic view showing how a prepreg having a donut-shaped divided shape is prepared and arranged according to the present invention.
【図２】本発明に従って準備したプリプレグを、互いに
部分的に重ね合わせてドーナツ形状に配置する様子を示
す模式図である。FIG. 2 is a schematic view showing a state in which prepregs prepared according to the present invention are partially overlapped with each other and arranged in a donut shape.
【図３】本発明において、分割した形状のプリプレグを
ドーナツ形に配置したものの間に、ドーナツ形状のプリ
プレグを配置する様子を示す模式図である。FIG. 3 is a schematic view showing a state in which a donut-shaped prepreg is arranged between divided prepregs arranged in a donut shape in the present invention.
【図４】本発明において、プリプレグの分割形状につい
て他の態様を示す模式図である。FIG. 4 is a schematic view showing another embodiment of the divided shape of the prepreg in the present invention.
１、１１ プリプレグ 1,11 prepreg
Claims (5)
円筒形状のブレーキ摩擦材の製造方法であって、 炭素繊維織布にマトリックスとしての炭素を付着させた
プリプレグを調製する工程と、 得られたプリプレグを切断して、摩擦材用部材を形成す
る工程と、 得られた摩擦材用部材を積層したものについて、成形お
よび焼結を施す工程とを備え、 前記プリプレグを切断して得られる摩擦材用部材に、前
記摩擦材の形状に沿った中空円形を分割した形状のもの
が含まれており、 前記摩擦材用部材を積層するに際して、前記分割した形
状の部材を集めて配置し、前記中空円形の配置を構成す
ることを特徴とする、ブレーキ摩擦材の製造方法。1. A method for producing a hollow cylindrical brake friction material comprising a carbon fiber reinforced carbon composite material, the method comprising: preparing a prepreg in which carbon as a matrix is adhered to a carbon fiber woven cloth, A friction material obtained by cutting the prepreg, comprising a step of cutting a prepreg to form a friction material member, and a step of forming and sintering a laminate of the obtained friction material members. The member for use includes a shape obtained by dividing a hollow circle along the shape of the friction material, and when the members for friction material are stacked, the members of the divided shape are collected and arranged, A method of manufacturing a brake friction material, characterized by forming a circular arrangement.
るに際し、隣合う部材同士を部分的に重ね合わせること
を特徴とする、請求項１に記載の製造方法。2. The manufacturing method according to claim 1, wherein adjacent members are partially overlapped with each other when the members having the divided shapes are collected and arranged.
形の４等分以下の大きさであることを特徴とする、請求
項１または２に記載の製造方法。3. The manufacturing method according to claim 1, wherein the divided member has a size equal to or smaller than four equal parts of the hollow circle.
のと、前記中空円形のものをｘ等分（ｘは４以上の整
数）したものとからなり、前記摩擦材用部材を積層する
に際して、前記中空円形のものと前記ｘ等分したものと
が重ねられることを特徴とする、請求項１〜３のいずれ
か１項に記載の製造方法。4. The friction material member is composed of the hollow circular member and the hollow circular member divided into x equal parts (x is an integer of 4 or more), and the friction material member is laminated. At this time, the hollow circular shape and the x-divided shape are overlapped with each other, and the manufacturing method according to claim 1.
等分（ｘは４以上の整数）したものからなる、請求項１
〜３のいずれか１項に記載の製造方法。5. The member for friction material has the hollow circle as x.
Claim 1 which consists of equal parts (x is an integer greater than or equal to 4).
4. The manufacturing method according to any one of 3 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6088570A JPH07293613A (en) | 1994-04-26 | 1994-04-26 | Manufacture of brake frictional member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6088570A JPH07293613A (en) | 1994-04-26 | 1994-04-26 | Manufacture of brake frictional member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07293613A true JPH07293613A (en) | 1995-11-07 |
Family
ID=13946531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6088570A Withdrawn JPH07293613A (en) | 1994-04-26 | 1994-04-26 | Manufacture of brake frictional member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07293613A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010138954A (en) * | 2008-12-10 | 2010-06-24 | Tokai Material Co Ltd | Method for manufacturing annular friction material |
| CN110862266A (en) * | 2018-08-27 | 2020-03-06 | 霍尼韦尔国际公司 | Segmented layered carbon fiber preform |
-
1994
- 1994-04-26 JP JP6088570A patent/JPH07293613A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010138954A (en) * | 2008-12-10 | 2010-06-24 | Tokai Material Co Ltd | Method for manufacturing annular friction material |
| CN110862266A (en) * | 2018-08-27 | 2020-03-06 | 霍尼韦尔国际公司 | Segmented layered carbon fiber preform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010703 |