JP2817485B2 - Thin graphite gasket - Google Patents
Thin graphite gasketInfo
- Publication number
- JP2817485B2 JP2817485B2 JP31292691A JP31292691A JP2817485B2 JP 2817485 B2 JP2817485 B2 JP 2817485B2 JP 31292691 A JP31292691 A JP 31292691A JP 31292691 A JP31292691 A JP 31292691A JP 2817485 B2 JP2817485 B2 JP 2817485B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- density
- expanded graphite
- gasket
- graphite sheet
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄板黒鉛質ガスケット
関する。The present invention relates to a sheet graphite gasket.
【０００２】[0002]
【従来の技術】従来の黒鉛質ガスケットとしては、打ち
抜きプレスにより多数のフックを切り起して設けた厚さ
０．１５〜０．２５mmの金属補強心板の両面に膨張黒鉛
シートを圧着したもの、０．１５〜０．２５mmの平板の
金属補強心板の両面に接着剤で膨張黒鉛シートを接着し
たものなどが知られている。2. Description of the Related Art A conventional graphite gasket is obtained by pressing an expanded graphite sheet on both sides of a metal reinforcing core plate having a thickness of 0.15 to 0.25 mm formed by cutting and raising a number of hooks by a punching press. , An expanded graphite sheet bonded to both sides of a flat metal reinforcing core of 0.15 to 0.25 mm with an adhesive is known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、フック
を設けた金属補強心板を用いたものは、ガスケットの強
度は高いが、最終板厚が１．０〜２．０mmに制約される
ので薄板化が図れない。また、平板の金属補強心板に接
着剤で膨張黒鉛シートを接着するものは次のような問題
がある。即ち、接着後の熱処理時に揮発性ガスを発生す
る接着剤を用いる場合は、ふくれや亀裂が発生し易いの
で接着の方法が難しい。エポキシ樹脂系の接着剤を用い
る場合は、高温で処理する必要があるため化学的安定性
が損なわれるほか、高密度のシートを貼り合わせるため
油浸漬後の圧縮強度に乏しい。本発明は、最終板厚が薄
く、上記した接着上の問題がなく、耐油性に優れる薄板
黒鉛質ガスケットを提供するものである。However, in the case of using a metal reinforcing core plate provided with hooks, the strength of the gasket is high, but the final plate thickness is limited to 1.0 to 2.0 mm, so that the thickness is reduced. I can not plan. Further, the one in which the expanded graphite sheet is bonded to the flat metal reinforcing core plate with an adhesive has the following problems. That is, when an adhesive that generates volatile gas during heat treatment after bonding is used, blisters and cracks are easily generated, so that the bonding method is difficult. When an epoxy resin-based adhesive is used, it must be treated at a high temperature, so that chemical stability is impaired. In addition, since a high-density sheet is bonded, the compressive strength after oil immersion is poor. An object of the present invention is to provide a thin graphite gasket which has a small final plate thickness, does not have the above-mentioned adhesion problem, and has excellent oil resistance.
【０００４】[0004]
【課題を解決するための手段】本発明は、金属板の片面
又は両面に、厚さ０．２５〜０．５mmで密度が０．２〜
０．５ｇ／cm3の膨張黒鉛シートをフェノール樹脂で接
着してなる薄板黒鉛質ガスケットに関する。According to the present invention, a metal plate is provided on one or both sides with a thickness of 0.25-0.5 mm and a density of 0.2-0.5 mm.
The present invention relates to a thin graphite gasket formed by bonding a 0.5 g / cm 3 expanded graphite sheet with a phenol resin.
【０００５】本発明は、密度が０．２〜０．５ｇ／cm3
という低密度の膨張黒鉛シートを用いて、接着後の熱処
理時に接着剤のフェノール樹脂から発生する揮発性のガ
スを逃げ易くし、かつシート内への接着用のフェノール
樹脂の含浸量を多くして耐油性の向上を図るものであ
る。密度が０．５ｇ／cm3を越えるとこの作用や効果が
減少し、０．２ｇ／cm3未満では含浸された樹脂が滲み
出てくる恐れがある。また膨張黒鉛シートの厚さは０．
２５〜０．５mmとされる。０．２５mm未満では含浸され
た樹脂が滲み出てくる恐れがあり、０．５mmを越えると
樹脂が含浸される層の厚さが相対的に薄くなって耐油性
が低下する。金属板の種類は、特に制限はないが通常は
強度や価格の点から鉄系の平板が使用される。中でも、
バネ鋼板が薄くても弾性限界が高く、疲労抵抗があるの
で好ましいものである。According to the present invention, the density is 0.2 to 0.5 g / cm 3.
By using a low-density expanded graphite sheet, it is easy to escape volatile gas generated from the adhesive phenolic resin during heat treatment after bonding, and increase the amount of phenolic resin impregnated into the sheet. The purpose is to improve oil resistance. If the density exceeds 0.5 g / cm 3 , this effect or effect decreases, and if the density is less than 0.2 g / cm 3 , the impregnated resin may ooze out. The thickness of the expanded graphite sheet is 0.1 mm.
25 to 0.5 mm. If the thickness is less than 0.25 mm, the impregnated resin may ooze out. If the thickness exceeds 0.5 mm, the thickness of the layer impregnated with the resin becomes relatively thin and the oil resistance decreases. The type of metal plate is not particularly limited, but usually an iron-based flat plate is used from the viewpoint of strength and price. Among them,
Even if the spring steel plate is thin, it is preferable because the elastic limit is high and there is fatigue resistance.
【０００６】[0006]
【実施例】次に本発明の実施例を説明する。 実施例１ フェノール樹脂系接着剤のセメダイン１１０をメチルエ
チルケトン（ＭＥＫ）により希釈して、固形分の濃度を
３０重量％とし、これを厚さ０．２mmのバネ鋼板ＳＵＳ
３０１の両面に塗工し、風乾後乾燥機に入れ８０℃で１
時間加熱してＭＥＫを蒸発させた。次に、このＳＵＳ３
０１の塗工面に密度０．３ｇ／cm3、厚さ０．２５mmの
膨張黒鉛シートを重ねて、金型温度を１８０℃にしたプ
レスにより膨張黒鉛シートの密度が０．８ｇ／cm3にな
るまで加圧して仮成形後、コールドロールにより加圧し
て、全体の厚さが０．４mm、膨張黒鉛シート部分の密度
が１．２ｇ／cm3のガスケットを得た。Next, embodiments of the present invention will be described. Example 1 Cemedine 110, a phenolic resin-based adhesive, was diluted with methyl ethyl ketone (MEK) to a solid content of 30% by weight.
301, apply on both sides, air-dry and put in a dryer at 80 ° C.
Heated for a period of time to evaporate the MEK. Next, this SUS3
The expanded graphite sheet having a density of 0.3 g / cm 3 and a thickness of 0.25 mm was overlaid on the coated surface of No. 01, and the density of the expanded graphite sheet was 0.8 g / cm 3 by pressing at a mold temperature of 180 ° C. After pressurizing and temporarily forming, a cold roll was used to obtain a gasket having a total thickness of 0.4 mm and a density of the expanded graphite sheet portion of 1.2 g / cm 3 .
【０００７】比較例１ 実施例１と同じ接着剤塗工の金属板の塗工面に密度１．
０ｇ／cm3で厚さ０．２５mmの膨張黒鉛シートを重ね
て、プレスにより熱圧成形して全体の厚さが０．４mm、
膨張黒鉛シート部分の密度が１．２ｇ／cm3のガスケッ
トを得た。COMPARATIVE EXAMPLE 1 The same adhesive as in Example 1 was coated on a metal plate with a density of 1.
An expanded graphite sheet having a thickness of 0 g / cm 3 and a thickness of 0.25 mm is overlaid and hot-pressed by pressing to obtain a total thickness of 0.4 mm.
A gasket having a density of the expanded graphite sheet portion of 1.2 g / cm 3 was obtained.
【０００８】比較例２ 多数のフックを設けた厚さ０．２mmの鉄板の両面に密度
１．０ｇ／cm3、厚さ０．８mmの膨張黒鉛シートを重ね
て圧着し、全体の厚さが１．０mm、膨張黒鉛シート部分
の密度が１．２ｇ／cm3のガスケットを得た。Comparative Example 2 An expanded graphite sheet having a density of 1.0 g / cm 3 and a thickness of 0.8 mm is overlaid on both surfaces of a 0.2 mm-thick iron plate provided with a large number of hooks and pressure-bonded. A gasket having a density of 1.0 mm and an expanded graphite sheet portion of 1.2 g / cm 3 was obtained.
【０００９】実施例及び比較例で得られたガスケットに
ついて、シール性及び耐油性を測定評価した。シール性
は各ガスケットを打ち抜いて外径３４mm、内径３０mmの
試験片を作成し、これを治具で挾んで８０kg／cm2の面
圧で締め付け、内径側に５０重量％濃度のエチレングリ
コール水溶液による内圧をかけて行き、外径側への液の
漏出の有無を確認した。耐油性は、ＡＳＴＭのＮo.３オ
イル中に１００℃でガスケットを５時間浸漬後の圧縮破
壊強度を求めた。この結果を表１に示す。表１において
シール性はシール出来る液圧を示している。The gaskets obtained in Examples and Comparative Examples were measured and evaluated for sealing properties and oil resistance. For the sealing property, a test piece having an outer diameter of 34 mm and an inner diameter of 30 mm was prepared by punching out each gasket, clamped with a jig and tightened with a surface pressure of 80 kg / cm 2. The internal pressure was applied, and the presence or absence of leakage of the liquid to the outer diameter side was confirmed. The oil resistance was determined by measuring the compressive fracture strength after immersing the gasket in ASTM No. 3 oil at 100 ° C. for 5 hours. Table 1 shows the results. In Table 1, the sealing property indicates the liquid pressure at which sealing can be performed.
【００１０】[0010]
【表１】 [Table 1]
【００１１】表１において、シール性試験の比較例１の
リークは、接着後の熱処理時にフェノール樹脂から発生
する揮発性ガスによって膨張黒鉛シートが層間剥離を起
したためである。耐油性は、明らかに実施例のものが比
較例のものより優れていることを示している。これは膨
張黒鉛シートに樹脂が含浸されていることによるもので
ある。In Table 1, the leak in Comparative Example 1 in the sealability test is due to the delamination of the expanded graphite sheet due to the volatile gas generated from the phenolic resin during the heat treatment after bonding. The oil resistance clearly shows that the examples are better than the comparative examples. This is because the expanded graphite sheet is impregnated with the resin.
【００１２】[0012]
【発明の効果】本発明によれば、黒鉛質ガスケットの薄
板化が達成され、この黒鉛質ガスケットは耐油性に優れ
たものである。According to the present invention, the thickness of the graphite gasket can be reduced, and the graphite gasket has excellent oil resistance.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−36291（ＪＰ，Ａ) 特開 昭56−157478（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C09K 3/10────────────────────────────────────────────────── (5) References JP-A-2-36291 (JP, A) JP-A-56-157478 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C09K 3/10
Claims (1)
〜０．５mmで密度が０．２〜０．５ｇ／cm3の膨張黒鉛
シートをフェノール樹脂で接着してなる薄板黒鉛質ガス
ケット。1. A metal plate having a thickness of 0.25 on one or both sides
A thin graphite gasket obtained by bonding an expanded graphite sheet having a density of 0.2 to 0.5 g / cm 3 with a phenol resin to 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31292691A JP2817485B2 (en) | 1991-11-28 | 1991-11-28 | Thin graphite gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31292691A JP2817485B2 (en) | 1991-11-28 | 1991-11-28 | Thin graphite gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05148474A JPH05148474A (en) | 1993-06-15 |
| JP2817485B2 true JP2817485B2 (en) | 1998-10-30 |
Family
ID=18035137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31292691A Expired - Lifetime JP2817485B2 (en) | 1991-11-28 | 1991-11-28 | Thin graphite gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2817485B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630688B (en) * | 2017-11-09 | 2020-06-02 | 中国石油大港油田勘探开发研究院 | Novel technical evaluation method for dilution-doping cold recovery of high-pour-point oil reservoir stratum |
-
1991
- 1991-11-28 JP JP31292691A patent/JP2817485B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05148474A (en) | 1993-06-15 |
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