JPH01317109A - Production of carbon sliding material - Google Patents
Production of carbon sliding materialInfo
- Publication number
- JPH01317109A JPH01317109A JP63146808A JP14680888A JPH01317109A JP H01317109 A JPH01317109 A JP H01317109A JP 63146808 A JP63146808 A JP 63146808A JP 14680888 A JP14680888 A JP 14680888A JP H01317109 A JPH01317109 A JP H01317109A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- product
- fired
- sliding material
- inert atmosphere
- 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
- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 10
- 229910052799 carbon Inorganic materials 0.000 title claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 20
- 239000000057 synthetic resin Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 13
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 11
- 239000012298 atmosphere Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 15
- 238000010304 firing Methods 0.000 claims description 14
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 abstract description 9
- 229910021397 glassy carbon Inorganic materials 0.000 abstract description 8
- 238000010000 carbonizing Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 2
- 239000000945 filler Substances 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 239000005011 phenolic resin Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 4
- 229920001568 phenolic resin Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000007849 furan resin Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/524—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from polymer precursors, e.g. glass-like carbon material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、メカニカルシール用のガラス状カーボン摺動
材料を製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a glassy carbon sliding material for mechanical seals.
メカニカルシール用のガラス状カーボン摺動材料は、従
来、フェノール樹脂、フラン樹脂等の熱硬化性合成樹脂
からなる成形体を不活性雰囲気で焼成して炭化させるこ
とにより製造されている。この材料は、黒鉛化していな
いガラス状カーボン材料であることにより、通常の黒鉛
質もしくは黒鉛部分が多いカーボン摺動材料に比べると
非常に硬く、また耐酸化性に優れている。Glass-like carbon sliding materials for mechanical seals have conventionally been produced by carbonizing a molded body made of a thermosetting synthetic resin such as a phenol resin or a furan resin by firing it in an inert atmosphere. Since this material is a glassy carbon material that is not graphitized, it is extremely hard and has excellent oxidation resistance compared to ordinary graphite or carbon sliding materials that have many graphite parts.
しかしながら、熱硬化性合成樹脂成形体を焼成し、焼成
物をそのまま摺動材料とする従来の製造法は、焼成時に
亀裂が発生し易いため、大型の摺動材料を作れない（厚
さ２〜３ｍｍのものしか作れない）ばかりか製品が割れ
易いという問題があった。さらに、亀裂発生を避ける必
要上、焼成速度を上げられず、生産性にも問題があった
。However, the conventional manufacturing method, in which a thermosetting synthetic resin molded body is fired and the fired product is directly used as a sliding material, cannot produce large-sized sliding materials (thickness 2 to (Only 3 mm can be made) and there was a problem that the product was easily broken. Furthermore, due to the need to avoid cracking, it was not possible to increase the firing rate, which caused problems in productivity.
そこで本発明の目的は、大型かつ良質のガラス状カーボ
ン摺動材料を高い生産性をもって容易に製造し得る方法
を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for easily manufacturing a large-sized, high-quality glass-like carbon sliding material with high productivity.
本発明が提供するガラス状カーボン摺動材料の製造法は
、熱硬化性合成樹脂を不活性雰囲気で焼成したのち粉砕
して得られた炭素質粉末を熱硬化性合成樹脂と混合して
成形し、得られた成形物を不活性雰囲気で焼成して炭化
させることを特徴とする。The method for manufacturing the glass-like carbon sliding material provided by the present invention involves baking a thermosetting synthetic resin in an inert atmosphere and then pulverizing the resulting carbonaceous powder, mixing the obtained carbonaceous powder with a thermosetting synthetic resin, and molding the mixture. The method is characterized in that the obtained molded product is fired and carbonized in an inert atmosphere.
この製造法で用いる炭素質粉末は、熱硬化性合成樹脂の
成形物を約６００°Ｃ以上の不活性雰囲気で焼成し、さ
らに任意の方法で、望ましくは約２００メツシユ以下に
、微粉砕したものである。ただし、完全に炭化している
必要はなく、半炭化物であってもよい。原料樹脂として
は、フェノール樹脂、フラン樹脂など、焼成時の炭素収
率の高いものが好ましい。この原料は、低揮発分のフィ
ラー（骨材）となり、焼成工程における成形体からの揮
発分を少なくして割れにくくする。The carbonaceous powder used in this manufacturing method is obtained by firing a thermosetting synthetic resin molded product in an inert atmosphere at a temperature of about 600°C or higher, and then finely pulverizing it by any method, preferably to about 200 mesh or less. It is. However, it does not need to be completely carbonized, and may be semi-carburized. As the raw material resin, those having a high carbon yield during firing, such as phenol resin and furan resin, are preferable. This raw material becomes a filler (aggregate) with a low volatile content, and reduces the volatile content from the molded body during the firing process, making it difficult to break.
炭素質粉末と混合する熱硬化性合成樹脂は、成形工程に
おいては炭素質粉末のバインダーとして作用する。The thermosetting synthetic resin mixed with the carbonaceous powder acts as a binder for the carbonaceous powder during the molding process.
この樹脂としても、フェノール樹脂、フラン樹脂など、
焼成時の炭素収率の高いものが好ましい。また、フィラ
ーとなる上記炭素質粉末の製造に用いた合成樹脂と同じ
種類の樹脂からなるものが好ましいが、別の樹脂からな
るものであってもよい。This resin also includes phenolic resin, furan resin, etc.
Those with a high carbon yield during firing are preferred. Further, although it is preferable that the resin be made of the same type of synthetic resin as the synthetic resin used to produce the carbonaceous powder that will serve as the filler, it may be made of a different resin.
フィラーとなる炭素質粉末とその成形用バインダーとな
る熱硬化性合成樹脂とは、後者が全体の約２０〜４０重
量％になるような比率で混合する。バインダーが過剰の
場合は大型の成形体を焼成する場合に割れ易く、またバ
インダー不足の場合は、製品の強度が不十分になる。こ
の場合、全体の約２０重量％程度までは、上記炭素質粉
末以外のフィラーを配合してもよい。The carbonaceous powder serving as a filler and the thermosetting synthetic resin serving as a molding binder are mixed in such a ratio that the latter accounts for about 20 to 40% by weight of the total. If there is an excess of binder, the molded product will easily break when fired, and if there is not enough binder, the strength of the product will be insufficient. In this case, fillers other than the above-mentioned carbonaceous powder may be blended up to about 20% by weight of the total.
原料の混合方法および原料混合物の成形方法は任意であ
る。たとえば、ロール機で加熱下に混練し、冷却して固
化させた混合物を粉砕し、得られた粉末を金型中に入れ
て所望の形状に熱圧成形する。ほかに、射出成形も可能
である。The method of mixing the raw materials and the method of molding the raw material mixture are arbitrary. For example, the mixture is kneaded under heat with a roll machine, cooled and solidified, and then pulverized, and the resulting powder is placed in a mold and hot-pressed into a desired shape. Alternatively, injection molding is also possible.
得られた成形体の焼成は、通常のカーボン材料製造にお
ける焼成の常法に従って行うことができる。焼成温度は
、製品の硬さや強度が最も高くなる約１０００〜１５０
０℃が適当である。この工程では、炭化未了のフィラー
を用いた場合におけるフィラーの炭化が進むと共にバイ
ンダーの炭化が起こるが、いずれも合成樹脂系のもので
あるため黒鉛化しに＜＜、シたがって、成形体全体がガ
ラス状カーボンに変換される。The obtained molded body can be fired in accordance with a conventional firing method in the production of ordinary carbon materials. The firing temperature is approximately 1000 to 150, which is where the hardness and strength of the product are highest.
0°C is suitable. In this process, if a filler that has not yet been carbonized is used, the carbonization of the filler progresses and the carbonization of the binder occurs, but since both are synthetic resin-based, the entire molded object is not graphitized. is converted to glassy carbon.
上述のようにして得られるガラス状カーボンは、焼成前
のフィラーとバインダーとの界面であった部分に微細な
気孔を有し、したがって、従来の製造法で作られたもの
と比べると概して気孔率が高いが、摺動材料として使う
場合、それは欠点とはならない。そして、ガラス状カー
ボン摺動材料の特長である高硬度、高張度といった特性
を十分備えており、そのような特性を必要とする分野で
使用するのに適したものである。The glassy carbon obtained as described above has fine pores in the area that was the interface between the filler and the binder before firing, and therefore generally has a lower porosity than that made using conventional manufacturing methods. However, when used as a sliding material, this is not a disadvantage. Furthermore, it has sufficient characteristics such as high hardness and high tension, which are characteristics of glassy carbon sliding materials, and is suitable for use in fields that require such characteristics.
実施例１
ノボラックをフェノール樹脂（住人デュレズ製ＰＲ−３
１１）の射出成形品を８００℃の窒素雰囲気中で１時間
焼成した。次いでこれを２００メツシユ以下に粉砕し、
粉砕物の７０重量部を、上記フェノール樹脂３０重量部
と混合し、８０℃に加熱された２本ロールのロール機で
約５分間混練した。得られた混合物は、冷却後１０メツ
シユ以下に粉砕し、１５０°Ｃの金型に入れて３００
ｋｇ／ｃｍ”に加圧し、５ｍｍＸ １０ｍｍＸ ４０ｍ
ｍの板状成形体および６０ｍｍ４ Ｘ ５ｍｍＬの円板
状成形体を得た。Example 1 Novolac was mixed with phenol resin (PR-3 manufactured by Jumin Durez)
The injection molded product of 11) was fired in a nitrogen atmosphere at 800° C. for 1 hour. Next, crush this to less than 200 mesh,
70 parts by weight of the pulverized material was mixed with 30 parts by weight of the above phenolic resin and kneaded for about 5 minutes using a two-roll mill heated to 80°C. After cooling, the obtained mixture was crushed into 10 meshes or less, placed in a mold at 150°C, and heated at 300°C.
kg/cm", 5mm x 10mm x 40m
A plate-shaped molded body of 5 mm and a disc-shaped molded body of 60 mm 4 × 5 mm L were obtained.
成形体の焼成は、１５０°０−６００℃を５°Ｏ／Ｉｌ
［ｒで昇温し、６００°０−１２００°Ｃを５０°Ｏ／
Ｈｒで昇温し、その後１２００°Ｃに４時間保つことに
より行なった。The molded body is fired at 150°0-600°C at 5°O/Il.
[Raise temperature at 600°0-1200°C at 50°O/
The temperature was raised at 1200° C. for 4 hours.
得られた焼成物はガラス状カーボン特有の破面を示し、
割れなどの外観異常は認められなかった。The obtained fired product showed a fracture surface characteristic of glassy carbon,
No appearance abnormalities such as cracks were observed.
実施例２
液状フェノール樹脂・ヒタフラン（日立化成工業株式会
社）自然硬化させた後、６００°Ｃの窒素雰囲気中で１
時間焼成Ｃだ。焼成物を２００メツシユ以下に粉砕し、
その７５重量部をフェノール樹脂・ベルパール（鐘紡株
式会社）２５部と混合し、実施例１と同様にして成形、
焼成した。製品はガラス状カーボン特有の破面を示し、
割れなどの外観異常は認められなかった。Example 2 Liquid phenolic resin Hitafuran (Hitachi Chemical Co., Ltd.) After natural curing, 1% in a nitrogen atmosphere at 600°C
Time firing C. Grind the fired product to 200 mesh or less,
75 parts by weight of the mixture was mixed with 25 parts of phenolic resin Bell Pearl (Kanebo Co., Ltd.), and molded in the same manner as in Example 1.
Fired. The product exhibits a fracture surface typical of glassy carbon,
No appearance abnormalities such as cracks were observed.
比較例
フェノール樹脂・ベルパールを、１７０°Ｃの金型中、
約１００ ｋｇ／ｃｍ２に５分間加圧して成形し、実施
例１の場合と同様の板状成形体および円板状成形体を作
成した。これを１°Ｏ／Ｈｒの昇温速度で６００°Ｃま
で昇温しだが、ここ迄の過程で焼成物には多数のクラッ
クが発生した。その後１２００°Ｃに昇温し、同温度で
一時間焼成した。製品には無数のクラックが認められた
。Comparative Example Phenol resin Bell Pearl was placed in a mold at 170°C.
A plate-like molded body and a disc-shaped molded body similar to those in Example 1 were produced by pressurizing and molding at approximately 100 kg/cm 2 for 5 minutes. This was heated to 600°C at a heating rate of 1°O/Hr, but many cracks occurred in the fired product during the process up to this point. Thereafter, the temperature was raised to 1200°C and baked at the same temperature for 1 hour. Numerous cracks were observed in the product.
以上の３例による製品の物性は次のとおりであった。The physical properties of the products from the three examples above were as follows.
硬さ（Ｈｓ） 比重 曲げ強度（ｋｇ／ｃｍ２）
実施例１ １２０ １．４５ ８００実施例２
１１０ １−４７ ７００比較例 １２
０ １．５５” −＊ クラックの無い部分
〔発明の効果〕
本発明の製造法は、焼成して炭化させた合成樹脂をフィ
ラーとして含有する成形体を合成樹脂系バインダーによ
り製造し、それを焼成するので、成形体焼成工程におけ
る揮発分が少なく、収縮が小さい。したがって、合成樹
脂のみからなる成形体を焼成する従来のガラス状カーボ
ン材料製造法と比べると、焼成工程における収縮歪みが
減って亀裂発生が少なくなり、成形体を短時間に焼成す
ることができるから、生産性が優れている。また、同じ
理由により、５〜１０ｍｍ程度の肉厚品も、容易に製造
することができる。また、従来、複雑な形状のものは成
形が困難であることにより製造できなかったが、合成樹
脂炭化物をフィラーとして用いる本発明の製造法では、
成形を射出成形や加圧成形で行うことができるので、従
来は製造困難であったような複雑形状品も製造可能にな
る。Hardness (Hs) Specific gravity Bending strength (kg/cm2)
Example 1 120 1.45 800 Example 2
110 1-47 700 Comparative Example 12
0 1.55" -* Part without cracks [Effect of the invention] The manufacturing method of the present invention involves producing a molded body containing a synthetic resin that has been fired and carbonized as a filler using a synthetic resin binder, and then firing it. Therefore, the volatile content and shrinkage in the molded body firing process are small.Therefore, compared to the conventional glass-like carbon material production method in which molded bodies made only of synthetic resin are fired, shrinkage distortion during the firing process is reduced and cracks are reduced. Productivity is excellent because less generation occurs and the molded body can be fired in a short time.Also, for the same reason, products with a thickness of about 5 to 10 mm can be easily manufactured. Conventionally, it was not possible to manufacture products with complex shapes due to the difficulty of molding them, but with the manufacturing method of the present invention, which uses synthetic resin carbide as a filler,
Since molding can be performed by injection molding or pressure molding, it becomes possible to manufacture products with complex shapes that were previously difficult to manufacture.
Claims (1)
て得られた炭素質粉末を熱硬化性合成樹脂と混合して成
形し、得られた成形物を不活性雰囲気で焼成して炭化さ
せることを特徴とするガラス状カーボン摺動材料の製造
法。The carbonaceous powder obtained by firing a thermosetting synthetic resin in an inert atmosphere and then pulverizing it is mixed with a thermosetting synthetic resin and molded, and the resulting molded product is fired in an inert atmosphere and carbonized. A method for manufacturing a glass-like carbon sliding material, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63146808A JPH01317109A (en) | 1988-06-16 | 1988-06-16 | Production of carbon sliding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63146808A JPH01317109A (en) | 1988-06-16 | 1988-06-16 | Production of carbon sliding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01317109A true JPH01317109A (en) | 1989-12-21 |
Family
ID=15415995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63146808A Pending JPH01317109A (en) | 1988-06-16 | 1988-06-16 | Production of carbon sliding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01317109A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014152805A (en) * | 2013-02-05 | 2014-08-25 | Toyo Tanso Kk | Sliding member and method of manufacturing the same |
-
1988
- 1988-06-16 JP JP63146808A patent/JPH01317109A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014152805A (en) * | 2013-02-05 | 2014-08-25 | Toyo Tanso Kk | Sliding member and method of manufacturing the same |
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