JPH11100267A - Carbon material and its production - Google Patents
Carbon material and its productionInfo
- Publication number
- JPH11100267A JPH11100267A JP9260409A JP26040997A JPH11100267A JP H11100267 A JPH11100267 A JP H11100267A JP 9260409 A JP9260409 A JP 9260409A JP 26040997 A JP26040997 A JP 26040997A JP H11100267 A JPH11100267 A JP H11100267A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- air
- carbon material
- amount
- weight
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、静圧空気軸受等の
カーボン摺動材として好適に用いられるカーボン材及び
その製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon material suitably used as a carbon sliding material for a hydrostatic air bearing or the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来の静圧空気軸受製造技術として、特
開昭６３−１８６０３０号公報に記載されているように
粒子径が４０μｍ以下に分布した炭素材料用素材を成
形、焼成、黒鉛化して得られるカーボン材を用いること
が知られているが、このカーボン材は同一ブロック内の
空気透過量のバラツキが空気圧力０．４９ＭＰａにおい
て２０ｃｃ／ｃｍ2／ｍｉｎを超え、静圧空気軸受に使
用する場合、空気透過量の調整が必要になるという問題
点があった。2. Description of the Related Art As a conventional static pressure air bearing manufacturing technique, a material for a carbon material having a particle size distribution of 40 μm or less as described in JP-A-63-186030 is molded, fired and graphitized. It is known to use the obtained carbon material. However, this carbon material has a variation in the amount of air permeation in the same block exceeding 20 cc / cm 2 / min at an air pressure of 0.49 MPa, and is used for a hydrostatic air bearing. In such a case, there is a problem that the air permeation amount needs to be adjusted.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、静圧
空気軸受に使用する場合、空気透過量のバラツキが小さ
いため空気透過量の調整が不要となり、生産性のよいカ
ーボン材を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a carbon material having a high productivity because when used in a hydrostatic air bearing, the variation in the amount of air permeation is small, so that it is not necessary to adjust the amount of air permeation. It is in.
【０００４】本発明の他の目的は、上記の空気透過量の
バラツキが小さいカーボン材の好適な製造方法を提供す
ることにある。Another object of the present invention is to provide a suitable method for producing a carbon material having a small variation in the amount of air permeation described above.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明は、同
一ブロック内の空気透過量のバラツキが空気圧力０．４
９ＭＰａ（５ｋｇｆ／ｃｍ2）において２０ｃｃ／ｃｍ2
／ｍｉｎ以下であるカーボン材を提供するものである。That is, according to the present invention, the variation in the amount of air permeation in the same block is reduced to an air pressure of 0.4.
20 cc / cm 2 at 9 MPa (5 kgf / cm 2 )
/ Min or less.
【０００６】本発明はまた、１〜６０μｍの粒径の粒子
を８０重量％以上含有する原料骨材粉と結合材からなる
混練物（捏和物）を粉砕して得られる粉砕粉を含有する
成形粉を成形し、焼成することを特徴とする上記のカー
ボン材の好適な製造方法を提供するものである。The present invention also includes a ground powder obtained by grinding a kneaded product (kneaded product) comprising a raw material aggregate powder containing at least 80% by weight of particles having a particle size of 1 to 60 μm and a binder. An object of the present invention is to provide a suitable method for producing the above-mentioned carbon material, which comprises molding and firing a molding powder.
【０００７】[0007]
【発明の実施の形態】本発明のカーボン材は、同一ブロ
ック内の空気透過量のバラツキが空気圧力０．４９ＭＰ
ａにおいて２０ｃｃ／ｃｍ2／ｍｉｎ以下と小さいた
め、静圧空気軸受に使用した場合、空気透過量の調整が
不要であり、品質の安定した軸受を生産性よく製造する
ことができる。前記空気透過量のバラツキが２０ｃｃ／
ｃｍ2／ｍｉｎより大きいと、空気透過量調整作業が煩
雑で、品質の安定化に時間を要する。前記の空気透過量
のバラツキは１５ｃｃ／ｃｍ2／ｍｉｎ以下であるとよ
り好ましい。BEST MODE FOR CARRYING OUT THE INVENTION In the carbon material of the present invention, the variation in the amount of air permeation in the same block is 0.49MPa.
Since a is as small as 20 cc / cm 2 / min or less in a, when used for a hydrostatic air bearing, it is not necessary to adjust the amount of air permeation, and a bearing of stable quality can be manufactured with high productivity. The variation of the air permeation amount is 20 cc /
If it is larger than cm 2 / min, the work of adjusting the amount of air permeation is complicated, and it takes time to stabilize the quality. More preferably, the variation of the air permeation amount is 15 cc / cm 2 / min or less.
【０００８】ここで同一ブロック内とは、金型プレス、
ラバープレス等で賦形され、製造されたカーボン材の１
つの成形体ブロック内を意味し、同一ブロック内での空
気透過量のバラツキは、できる限りブロックの全体から
サンプルを多く抽出して測定することが好ましい。具体
的方法としては、製造したブロックを高さ方向に上部、
中部、下部と三等分した３つのそれぞれの範囲におい
て、水平方向にみて中心部、中間部、外縁部の３箇所、
合計９箇所のサンプルを抽出し、空気透過量を測定し、
その最大値と最小値の差をもってバラツキとすることが
好ましい。Here, in the same block, a mold press,
One of the carbon materials manufactured and shaped by rubber press etc.
It means within one molded block, and it is preferable to measure the variation in the amount of air permeation in the same block by extracting as many samples as possible from the entire block. As a specific method, the manufactured block is placed in the upper part in the height direction,
In each of the three ranges divided into three parts, the middle part, the lower part, and the central part, the middle part, and the outer edge part when viewed in the horizontal direction,
Extract a total of 9 samples, measure the amount of air permeation,
It is preferable that the difference is obtained based on the difference between the maximum value and the minimum value.
【０００９】空気透過量は、サンプルをそれぞれ、ブロ
ックの成形加圧方向（金型プレスの場合）又は成形時の
重力方向（ラバープレスの場合）を２００ｍｍとした４
５０ｍｍ×４５０ｍｍ×２００ｍｍの大きさの直方体に
切り出し、図２示す空気透過量測定装置に、前記成形加
圧方向（金型プレスの場合）又は成形時の重力方向（ラ
バープレスの場合）に対して垂直方向の空気透過量を測
定するようにサンプルを固定し、０．４９ＭＰａ（５ｋ
ｇｆ／ｃｍ2）の圧力を加えて測定することができる。
測定される空気透過量の単位は、ｃｃ／ｃｍ2／ｍｉｎ
であるが、これは１ｃｍ2の面積当たりで、１分間に透
過する空気体積（ｃｃ）を意味する。図２において５は
試験片、６は空気ボンベ、７は圧力ゲージ、８は流量メ
ーターを示す。The amount of air permeation was determined by setting the sample to 200 mm in the block pressing direction (in the case of a die press) or in the direction of gravity during molding (in the case of a rubber press).
A rectangular parallelepiped having a size of 50 mm × 450 mm × 200 mm is cut out and is measured by the air permeation amount measuring apparatus shown in FIG. The sample was fixed so as to measure the amount of air permeation in the vertical direction.
gf / cm 2 ).
The unit of the measured air permeation amount is cc / cm 2 / min.
Although, this is a per area of 1 cm 2, which means a volume of air which passes per minute (cc). In FIG. 2, 5 indicates a test piece, 6 indicates an air cylinder, 7 indicates a pressure gauge, and 8 indicates a flow meter.
【００１０】本発明のカーボン材を製造するには、成形
粉として、１〜６０μｍの粒径の粒子を８０重量％以
上、好ましくは９０重量％以上含有する原料骨材粉と結
合材からなる混練物（捏和物）を粉砕して得られる粉砕
粉を含有するものを用いることが好ましい。原料骨材粉
中の１〜６０μｍの粒径の粒子が８０重量％未満だと得
られるカーボン材の空気透過量のバラツキが大きくなる
傾向にある。In order to produce the carbon material of the present invention, kneading is carried out by using a raw material aggregate powder containing particles having a particle size of 1 to 60 μm as 80% by weight or more, preferably 90% by weight or more and a binder as molding powder. It is preferable to use one containing a pulverized powder obtained by pulverizing a product (kneaded product). If the particles having a particle diameter of 1 to 60 μm in the raw material aggregate powder are less than 80% by weight, the air permeation amount of the obtained carbon material tends to vary widely.
【００１１】原料骨材としては、好ましくは、コークス
粉、黒鉛粉、カーボンブラック等が用いられる。結合材
としては、好ましくは、タール、ピッチ等が用いられ
る。As the raw material aggregate, preferably, coke powder, graphite powder, carbon black or the like is used. Preferably, tar, pitch or the like is used as the binder.
【００１２】原料骨材粉の捏和物中の配合割合は、４０
〜７０重量％とすることが好ましい。また、捏和物中の
結合材の配合割合は、３０〜６０重量％とすることが好
ましい。The mixing ratio of the raw material aggregate powder in the kneaded product is 40
It is preferable to set it to 70% by weight. Further, the mixing ratio of the binder in the kneaded product is preferably set to 30 to 60% by weight.
【００１３】本発明に用いられる成形粉としては、上記
捏和物を粉砕して得られる粉砕粉をそのまま用いること
ができるが、この粉砕粉にさらに有機物粉末を配合した
ものを用いることが好ましい。As the molding powder used in the present invention, a pulverized powder obtained by pulverizing the above kneaded material can be used as it is, but it is preferable to use a powder obtained by further mixing an organic substance powder with the pulverized powder.
【００１４】成形粉に配合される有機物粉末としては、
特に制限はないが、樹脂ビーズ、でんぷん粉、パルプ粉
等が好適に用いられる。樹脂ビーズとしては好ましくは
ポリメタクリル酸メチルビーズが用いられる。有機物粉
末は固定炭素率が２０％以下のものが好ましく用いられ
る。２０％を超えると、通気孔の形成が不十分となる傾
向がある。ここで固定炭素率とは、ＪＩＳ Ｋ ２４２
１に準拠した有機物を還元雰囲気中で８００℃で焼成
し、残った炭素質物量を意味する。As the organic powder to be mixed with the molding powder,
Although there is no particular limitation, resin beads, starch powder, pulp powder and the like are preferably used. Polymethyl methacrylate beads are preferably used as the resin beads. Organic powder having a fixed carbon ratio of 20% or less is preferably used. If it exceeds 20%, the formation of air holes tends to be insufficient. Here, the fixed carbon ratio refers to JIS K242
1 means the amount of carbonaceous material remaining after firing an organic substance at 800 ° C. in a reducing atmosphere.
【００１５】また、有機物粉末は平均粒径が５〜２０μ
ｍのものが好ましい。２０μｍより大きいと空気透過量
のバラツキが大きくなる傾向があり、５μｍより小さい
と分散が悪くなり気孔分布が不均質な組織となる傾向が
ある。さらに、その配合量は、成形粉に対して１〜２０
重量％の範囲とすることが好ましい。２０重量％より多
いと強度が低下し構造材とし不適となる傾向がある。ま
た、１％より少ないと、通気孔形成が不十分となる傾向
がある。The organic powder has an average particle size of 5 to 20 μm.
m is preferred. If it is larger than 20 μm, the variation in the amount of air permeation tends to increase, and if it is smaller than 5 μm, the dispersion tends to be poor and the pore distribution tends to be uneven. Furthermore, the compounding amount is 1 to 20 with respect to the molding powder.
It is preferably in the range of% by weight. If the content is more than 20% by weight, the strength tends to decrease and the material tends to be unsuitable as a structural material. If it is less than 1%, the formation of air holes tends to be insufficient.
【００１６】原料骨材粉と結合材とを捏和、粉砕するこ
とにより粉砕粉が得られる。捏和は、一般に双腕型ニー
ダー等を用いて、各材料を好ましくは２００〜２５０℃
で好ましくは５〜１０時間混練することにより行われ
る。A kneaded powder is obtained by kneading and pulverizing the raw material aggregate powder and the binder. The kneading is generally performed using a double-arm kneader or the like, and each material is preferably 200 to 250 ° C.
And preferably by kneading for 5 to 10 hours.
【００１７】粉砕は、捏和で得られた捏和物を各種粉砕
機を用いて平均粒子径が好ましくは２０〜３０μｍにな
るように粉砕することにより行われる。The pulverization is carried out by pulverizing the kneaded product obtained by kneading using various pulverizers so that the average particle diameter is preferably 20 to 30 μm.
【００１８】粉砕粉は造粒して用いることが好ましく、
捏和物を粉砕して得られる粉砕粉を平均粒径は５０〜１
００μｍに造粒することが好ましい。１００μｍより大
きいと空気透過量のバラツキが大きくなる傾向がある。
５０μｍより小さいと、造粒作業に時間を要する傾向が
ある。The ground powder is preferably granulated and used.
The pulverized powder obtained by pulverizing the kneaded product has an average particle size of 50 to 1
It is preferable to granulate to 00 μm. If it is larger than 100 μm, the variation in the amount of air permeation tends to increase.
If it is smaller than 50 μm, the granulating operation tends to take a long time.
【００１９】粉砕粉と有機粉末との混合は、各種混合機
で好ましくは１０〜３０分混合することにより行われ
る。The mixing of the pulverized powder and the organic powder is carried out by various mixers, preferably for 10 to 30 minutes.
【００２０】成形粉の造粒は、各種噴霧急速乾燥式造粒
機を用いて、造粒平均粒径が５０〜１００μｍになるよ
うに造粒することにより行われる。The granulation of the molding powder is carried out by using various types of spray-drying-type granulators so that the average granulated particle diameter is 50 to 100 μm.
【００２１】成形は、粉砕により得られ粉体又は造粒に
より得られた粉体を含む成形粉を、ブロック状にラバー
プレス、金型プレス等の方法で、賦形することにより行
われる。このときの圧力は、６００〜１４００ｋｇ／ｃ
ｍ2が好ましい。低いと得られた成形品の比重が下が
り、高いと焼成中に割れやすくなる傾向がある。The compacting is performed by shaping the compacted powder containing the powder obtained by pulverization or the powder obtained by granulation by a method such as a rubber press or a mold press. The pressure at this time is 600 to 1400 kg / c.
m 2 is preferred. When it is low, the specific gravity of the obtained molded article decreases, and when it is high, it tends to be easily cracked during firing.
【００２２】上記により得られた成形品を、焼成し、さ
らに用途に応じて黒鉛化することにより目的とするカー
ボン材が得られる。The molded product obtained as described above is fired, and further graphitized according to the intended use to obtain the desired carbon material.
【００２３】焼成は、還元雰囲気下、好ましくは８００
〜１０００℃に昇温して、行うことができる。焼成時間
は、３００〜５００時間が好ましい。還元雰囲気下で焼
成する方法としては、成形体のまわりに炭素粉を詰めて
焼成する方法等がある。The calcination is carried out under a reducing atmosphere, preferably 800
The temperature can be raised to １０００1000 ° C. The firing time is preferably 300 to 500 hours. As a method for firing in a reducing atmosphere, there is a method in which carbon powder is packed around a molded body and fired.
【００２４】こうして得られるカーボン材は、カーボン
摺動材として、カーボンベーン、シールパッキング、軸
受等に用いられる。中でも静圧空気軸受用として好適で
ある。The carbon material thus obtained is used as a carbon sliding material for carbon vanes, seal packing, bearings and the like. Among them, it is suitable for a hydrostatic air bearing.
【００２５】[0025]
【実施例】以下、本発明を実施例に基づいて詳細に説明
するが、本発明はこれに限定されるものではない。The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples.
【００２６】実施例１ 骨材として平均粒径１５〜２５μｍで１〜６０μｍの粒
径の粒子を９５重量％含む自家製黒鉛粉４５重量％とカ
ーボンブラック（カンカーブ社製、商品名サーマック
ス）１０重量％の混合物にバインダピッチ（川崎製鉄
製、商品名ＰＫＥ）４４重量％を配合し、温度２４０℃
で３時間混練した。この捏和物を平均粒径２５μｍに粉
砕し成形粉とした。この成形粉をφ１５０×１５０ｍｍ
の円筒状のゴム型に封入し、１０００ｋｇｆ／ｃｍ2で
ラバープレス成形した。得られた成形品を、還元雰囲気
下、室温から１０００℃まで１００時間で昇温し焼成し
た。得られた焼成品から特性測定用のサンプルを図１に
示す採取位置から採取し、物理特性と空気透過量を測定
した。空気透過量サンプルは図１に示す中間、中心、外
周位置について上、中、下の計９か所から前述の方法に
従って、物理特性用サンプルは図１に示す３か所からサ
ンプルを得た（以下同様）。Example 1 45% by weight of a home-made graphite powder containing 95% by weight of particles having an average particle diameter of 15 to 25 μm and a particle diameter of 1 to 60 μm as an aggregate, and 10% by weight of carbon black (trade name, trade name, manufactured by Can Curve) % Blended with 44% by weight of binder pitch (manufactured by Kawasaki Steel, PKE) at a temperature of 240 ° C.
For 3 hours. This kneaded product was pulverized to an average particle size of 25 μm to obtain a molding powder. This molding powder is φ150 × 150mm
And rubber-pressed at 1000 kgf / cm 2 . The obtained molded article was heated from room temperature to 1000 ° C. for 100 hours in a reducing atmosphere and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured. According to the above-described method, the air permeation amount samples were obtained from a total of nine locations, that is, the middle, center, and outer peripheral positions shown in FIG. Hereinafter the same).
【００２７】その結果、空気透過量のバラツキ（最大値
−最小値）は１８ｃｃ／ｃｍ2／ｍｉｎであった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 18 cc / cm 2 / min.
【００２８】実施例２ 実施例１で得られた成形粉９０重量％に樹脂ビーズ（ポ
リメタクリル酸メチルビーズ、平均粒径５μｍ）１０重
量％を混合撹拌して成形粉を得た。この成形粉をφ１５
０×１５０ｍｍの円筒状のゴム型に封入し、１０００ｋ
ｇｆ／ｃｍ2でラバープレス成形した。得られた成形品
を、、還元雰囲気下、室温から１０００℃まで１００時
間で昇温し焼成した。得られた焼成品から特性測定用の
サンプルを図１に示す採取位置から採取し、物理特性と
空気透過量を測定した。EXAMPLE 2 10% by weight of resin beads (polymethyl methacrylate beads, average particle size: 5 μm) were mixed and stirred with 90% by weight of the molding powder obtained in Example 1 to obtain a molding powder. This molding powder is φ15
Sealed in 0x150mm cylindrical rubber mold, 1000k
Rubber press molding was performed at gf / cm 2 . The obtained molded product was heated from room temperature to 1000 ° C. for 100 hours in a reducing atmosphere and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００２９】その結果、空気透過量のバラツキ（最大値
−最小値）は１１ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 11 cc / cm 2 / min.
【００３０】実施例３ 実施例１で得られた成形粉９０重量％に樹脂ビーズ（ポ
リメタクリル酸メチルビーズ、平均粒径１０μｍ）１０
重量％を混合撹拌して成形粉を得た。この成形粉をφ１
５０×１５０ｍｍの円筒状のゴム型に封入し、１０００
ｋｇｆ／ｃｍ2でラバープレス成形した。得られた成形
品を、還元雰囲気下、室温から１０００℃まで１００時
間で昇温し焼成した。得られた焼成品から特性測定用の
サンプルを図１に示す採取位置から採取し、物理特性と
空気透過量を測定した。Example 3 Resin beads (polymethyl methacrylate beads, average particle size: 10 μm) were added to 90% by weight of the molding powder obtained in Example 1.
The mixture was stirred by weight to obtain a molding powder. This molding powder is φ1
Sealed in a 50 × 150 mm cylindrical rubber mold, 1000
Rubber press molding was performed at kgf / cm 2 . The obtained molded article was heated from room temperature to 1000 ° C. for 100 hours in a reducing atmosphere and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００３１】その結果、空気透過量のバラツキ（最大値
−最小値）は１２ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 12 cc / cm 2 / min.
【００３２】実施例４ 実施例１で得られた成形粉９０重量％にでんぷん粉（サ
イデン化学（株）製、商品名サイビノール、平均粒径１
０μｍ）１０重量％を混合撹拌して成形粉を得た。この
成形粉をφ１５０×１５０ｍｍの円筒状のゴム型に封入
し、１０００ｋｇｆ／ｃｍ2でラバープレス成形した。
得られた成形品を、還元雰囲気下、室温から１０００℃
まで１００時間で昇温し焼成した。得られた焼成品から
特性測定用のサンプルを図１に示す採取位置から採取
し、物理特性と空気透過量を測定した。Example 4 90% by weight of the molding powder obtained in Example 1 was added to starch (manufactured by Seiden Chemical Co., Ltd., trade name Cybinol, average particle size 1).
(0 μm) and 10% by weight were mixed and stirred to obtain a molding powder. This molding powder was sealed in a cylindrical rubber mold of φ150 × 150 mm and subjected to rubber press molding at 1000 kgf / cm 2 .
The obtained molded article is heated from room temperature to 1000 ° C. in a reducing atmosphere.
The temperature was raised for 100 hours until firing. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００３３】その結果、空気透過量のバラツキ（最大値
−最小値）は１５ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 15 cc / cm 2 / min.
【００３４】実施例５ 実施例１で得られた成形粉９０重量％にパルプ粉末（山
陽国策パルプ（株）製、ＫＣフロック＃４００、平均粒
径２０μｍ）１０重量％を混合撹拌して成形粉を得た。
この成形粉をφ１５０×１５０ｍｍの円筒状のゴム型に
封入し、１０００ｋｇｆ／ｃｍ2でラバープレス成形し
た。得られた成形品を、還元雰囲気下、室温から１００
０℃まで１００時間で昇温し焼成した。得られた焼成品
から特性測定用のサンプルを図１に示す採取位置から採
取し、物理特性と空気透過量を測定した。EXAMPLE 5 10% by weight of pulp powder (KC Floc # 400, average particle size 20 μm, manufactured by Sanyo Kokusaku Pulp Co., Ltd.) was mixed and stirred with 90% by weight of the molding powder obtained in Example 1 to form a molding powder. I got
This molding powder was sealed in a cylindrical rubber mold of φ150 × 150 mm and subjected to rubber press molding at 1000 kgf / cm 2 . The obtained molded product is reduced from room temperature to 100
The temperature was raised to 0 ° C. for 100 hours and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００３５】その結果、空気透過量のバラツキ（最大値
−最小値）は１８ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 18 cc / cm 2 / min.
【００３６】実施例６ 実施例１で得られた成形粉を噴霧急速乾燥式造粒機にか
け、造粒粉平均粒径７０μｍの成形粉を得た。この成形
粉をφ１５０×１５０ｍｍの円筒状のゴム型に封入し、
１０００ｋｇｆ／ｃｍ2でラバープレス成形した。得ら
れた成形品を、還元雰囲気下、室温から１０００℃まで
１００時間で昇温し焼成した。得られた焼成品から特性
測定用のサンプルを図１に示す採取位置から採取し、物
理特性と空気透過量を測定した。Example 6 The molding powder obtained in Example 1 was applied to a spray-drying granulator to obtain a molding powder having an average particle diameter of 70 μm. This molding powder is sealed in a cylindrical rubber mold of φ150 × 150 mm,
Rubber press molding was performed at 1000 kgf / cm 2 . The obtained molded article was heated from room temperature to 1000 ° C. for 100 hours in a reducing atmosphere and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００３７】その結果、空気透過量のバラツキ（最大値
−最小値）は１４ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 14 cc / cm 2 / min.
【００３８】比較例１ 骨材として平均粒径１５〜２５μｍで１〜６０μｍの粒
径の粒子を６０重量％含む自家製黒鉛粉４５重量％とカ
ーボンブラック（カンカーブ社製、商品名サーマック
ス）１０重量％の混合物にバインダピッチ（川崎製鉄
製、商品名ＰＫＥ）４４重量％を配合し、温度２４０℃
で３時間混練した。この捏和物を平均粒径２５μｍに粉
砕し成形粉を得た。この成形粉をφ１５０×１５０ｍｍ
の円筒状のゴム型に封入し、１０００ｋｇｆ／ｃｍ2で
ラバープレス成形した。得られた成形品を、還元雰囲気
下、室温から１０００℃まで１００時間で昇温し焼成し
た。得られた焼成品から特性測定用のサンプルを図１に
示す採取位置から採取し、物理特性と空気透過量を測定
した。Comparative Example 1 45% by weight of self-made graphite powder containing 60% by weight of particles having an average particle diameter of 15 to 25 μm and 1 to 60 μm as an aggregate, and 10% by weight of carbon black (trade name, trade name, manufactured by Cancarb Corp.) % Blended with 44% by weight of binder pitch (manufactured by Kawasaki Steel, PKE) at a temperature of 240 ° C.
For 3 hours. This kneaded product was pulverized to an average particle size of 25 μm to obtain a molded powder. This molding powder is φ150 × 150mm
And rubber-pressed at 1000 kgf / cm 2 . The obtained molded article was heated from room temperature to 1000 ° C. for 100 hours in a reducing atmosphere and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００３９】その結果、空気透過量のバラツキ（最大値
−最小値）は３０ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 30 cc / cm 2 / min.
【００４０】比較例２ 骨材として平均粒径１５〜２５μｍで１〜６０μｍの粒
径の粒子を７０重量％含む自家製黒鉛粉４５重量％とカ
ーボンブラック（カンカーブ社製、商品名サーマック
ス）１０重量％の混合物にバインダピッチ（川崎製鉄
製、商品名ＰＫＥ）４４重量％を配合し、温度２４０℃
で２時間混練した。この捏和物を平均粒径２５μｍに粉
砕し成形粉を得た。この成形粉７０重量％にパルプ粉末
（山陽国策パルプ（株）製、ＫＣフロック＃４００、粒
径２０μｍ）１０重量％を混合撹拌して成形粉を得た。
この成形粉をφ１５０×１５０ｍｍの円筒状のゴム型に
封入し、１０００ｋｇｆ／ｃｍ2でラバープレス成形し
た。得られた成形品を、還元雰囲気下、室温から１００
０℃まで１００時間で昇温し焼成した。得られた焼成品
から特性測定用のサンプルを図１に示す採取位置から採
取し、物理特性と空気透過量を測定した。Comparative Example 2 45% by weight of a homemade graphite powder containing 70% by weight of particles having an average particle size of 15 to 25 μm and a particle size of 1 to 60 μm as an aggregate and 10% by weight of carbon black (trade name, manufactured by Cancarb Corp.) % Blended with 44% by weight of binder pitch (manufactured by Kawasaki Steel, PKE) at a temperature of 240 ° C.
For 2 hours. This kneaded product was pulverized to an average particle size of 25 μm to obtain a molded powder. 10% by weight of pulp powder (KC Floc # 400, manufactured by Sanyo Kokusaku Pulp Co., Ltd., particle size: 20 μm) was mixed and stirred with 70% by weight of this molding powder to obtain a molding powder.
This molding powder was sealed in a cylindrical rubber mold of φ150 × 150 mm and subjected to rubber press molding at 1000 kgf / cm 2 . The obtained molded product is reduced from room temperature to 100
The temperature was raised to 0 ° C. for 100 hours and fired. A sample for property measurement was collected from the obtained baked product from the collection position shown in FIG. 1, and the physical properties and the amount of air permeation were measured.
【００４１】その結果、空気透過量のバラツキ（最大値
−最小値）は３５ｃｃ／ｃｍ2／ｍｉｎ であった。As a result, the variation (maximum value-minimum value) of the air permeation amount was 35 cc / cm 2 / min.
【００４２】[0042]
【表１】 バラツキ＝最大値−最小値 表１に示すように、実施例１〜６の空気透過量のバラツ
キは、比較例より小さく、制御されていた。[Table 1] Variation = maximum value−minimum value As shown in Table 1, the variation of the air permeation amount of Examples 1 to 6 was smaller than that of the comparative example and was controlled.
【００４３】[0043]
【発明の効果】本発明により、静圧空気軸受に使用する
場合、空気透過量のバラツキが小さいため空気透過量の
調整が不要となるカーボン摺動材が得られた。このカー
ボン摺動材を用いると静圧空気軸受作製時の空気透過量
調整工程の時間短縮ができ、得られた製品の品質が安定
する。According to the present invention, a carbon sliding material which does not require adjustment of the amount of air permeation when used in a hydrostatic air bearing because the variation of the amount of air permeation is small is obtained. The use of this carbon sliding material can reduce the time required for the air permeation adjustment step when producing a hydrostatic air bearing, and stabilizes the quality of the obtained product.
【図面の簡単な説明】[Brief description of the drawings]
【図１】サンプルの採取位置を示す説明図FIG. 1 is an explanatory diagram showing a sampling position of a sample.
【図２】空気透過量測定装置の概略図FIG. 2 is a schematic diagram of an air permeation amount measuring device
１ 空気透過量サンプル位置（中間） ２ 空気透過量サンプル位置（中心） ３ 空気透過量サンプル位置（外周） ４ 物理特性用サンプル位置 ５ 試験片 ６ 空気ボンベ ７ 圧力ゲージ ８ 流量メーター 1 Air permeation amount sample position (middle) 2 Air permeation amount sample position (center) 3 Air permeation amount sample position (outer periphery) 4 Physical property sample position 5 Test piece 6 Air cylinder 7 Pressure gauge 8 Flow meter
Claims (4)
が空気圧力０．４９ＭＰａにおいて２０ｃｃ／ｃｍ2／
ｍｉｎ以下であるカーボン材。1. The variation in the amount of air permeation in the same block is 20 cc / cm 2 / at an air pressure of 0.49 MPa.
min or less carbon material.
以上含有する原料骨材粉と結合材からなる混練物を粉砕
して得られる粉砕粉を含有する成形粉を成形し、焼成す
ることを特徴とする請求項１記載のカーボン材の製造方
法。2. 80% by weight of particles having a particle size of 1 to 60 μm.
2. The method for producing a carbon material according to claim 1, wherein a molding powder containing a pulverized powder obtained by pulverizing a kneaded product comprising the raw material aggregate powder and the binder contained above is molded and fired.
以上含有する原料骨材粉と結合材からなる混練物を粉砕
して得られる粉砕粉に有機物粉末を１〜２０重量％含有
させた成形粉を成形し、焼成することを特徴とする請求
項１記載のカーボン材の製造方法。3. 80% by weight of particles having a particle size of 1 to 60 μm.
2. A molding powder obtained by pulverizing a kneaded product composed of the above-mentioned raw material aggregate powder and a binder and comprising a powder obtained by containing 1 to 20% by weight of an organic powder in a pulverized powder, followed by firing. A method for producing the carbon material as described above.
粒されたものである請求項２又は３記載のカーボン材の
製造方法。4. The method for producing a carbon material according to claim 2, wherein the pulverized powder is granulated to have an average particle size of 50 to 100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9260409A JPH11100267A (en) | 1997-09-25 | 1997-09-25 | Carbon material and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9260409A JPH11100267A (en) | 1997-09-25 | 1997-09-25 | Carbon material and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11100267A true JPH11100267A (en) | 1999-04-13 |
Family
ID=17347533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9260409A Pending JPH11100267A (en) | 1997-09-25 | 1997-09-25 | Carbon material and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11100267A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013001576A (en) * | 2011-06-10 | 2013-01-07 | Ibiden Co Ltd | Method for producing graphite material, and graphite material |
| JP2020152902A (en) * | 2019-03-19 | 2020-09-24 | 関西熱化学株式会社 | Carbon black molded body and method for producing the same |
| CN117447204A (en) * | 2023-12-22 | 2024-01-26 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
-
1997
- 1997-09-25 JP JP9260409A patent/JPH11100267A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013001576A (en) * | 2011-06-10 | 2013-01-07 | Ibiden Co Ltd | Method for producing graphite material, and graphite material |
| US8980787B2 (en) | 2011-06-10 | 2015-03-17 | Ibiden Co., Ltd. | Method for producing graphite material and graphite material |
| JP2020152902A (en) * | 2019-03-19 | 2020-09-24 | 関西熱化学株式会社 | Carbon black molded body and method for producing the same |
| CN117447204A (en) * | 2023-12-22 | 2024-01-26 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
| CN117447204B (en) * | 2023-12-22 | 2024-03-15 | 成都中超碳素科技有限公司 | Preparation method of mechanical carbon material |
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