JPH08245947A - Metallic gasket material, its production and metallic gasket - Google Patents
Metallic gasket material, its production and metallic gasketInfo
- Publication number
- JPH08245947A JPH08245947A JP5095595A JP5095595A JPH08245947A JP H08245947 A JPH08245947 A JP H08245947A JP 5095595 A JP5095595 A JP 5095595A JP 5095595 A JP5095595 A JP 5095595A JP H08245947 A JPH08245947 A JP H08245947A
- Authority
- JP
- Japan
- Prior art keywords
- graphite sheet
- expanded graphite
- metal gasket
- rubber
- metallic gasket
- 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]
【産業上の利用分野】本発明は、特に内燃機関のシリン
ダーヘッドとシリンダーブロックとの間をシールするの
に適当な金属ガスケット材料及びその製造法に関する。BACKGROUND OF THE INVENTION The present invention relates to a metal gasket material suitable for sealing between a cylinder head and a cylinder block of an internal combustion engine, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】従来の金属ガスケット材料は、特開平２
−３８７６０号公報、特開平３−２２９０６９号公報等
に示されるようにステンレス鋼板、普通鋼板等の金属鋼
板の表面にゴムの層を被覆したもの、特公平５−６３６
７０号公報などに示されるように膨張黒鉛シートを接着
したもの等が知られている。2. Description of the Related Art A conventional metal gasket material is disclosed in Japanese Patent Laid-Open No.
No. 38760, Japanese Patent Laid-Open No. 3-229069, etc., a metal steel plate such as a stainless steel plate or a plain steel plate, the surface of which is covered with a rubber layer, Japanese Patent Publication No. 5-636.
There is known one in which an expanded graphite sheet is adhered as shown in Japanese Patent Publication No. 70 and the like.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、金属鋼
板の表面にゴムの層を被覆した金属ガスケット材料は、
ゴムの被覆層が５〜３０μｍと薄いために、シリンダー
ヘッドやシリンダーブロックに付着した１０μｍ以上の
傷、ツールマークをシールすることが難しい。また、被
覆層のゴムは耐熱温度が通常１５０℃と低いために、高
温で長時間使用されるシリンダーヘッドガスケットでは
ゴムの被覆層が熱により劣化し、シール性能が低下する
恐れがある。However, the metal gasket material obtained by coating the surface of the metal steel sheet with the rubber layer is
Since the rubber coating layer is as thin as 5 to 30 μm, it is difficult to seal scratches and tool marks of 10 μm or more attached to the cylinder head or the cylinder block. Moreover, since the heat resistance temperature of the rubber of the coating layer is usually as low as 150 ° C., in a cylinder head gasket that is used at a high temperature for a long time, the coating layer of the rubber may be deteriorated by heat and the sealing performance may be deteriorated.
【０００４】一方、金属鋼板の表面に接着剤で膨張黒鉛
シートを接着したものは、フランジ面の面粗度吸収性や
耐熱性に優れるが、単に金属鋼板の表面に接着剤で膨張
黒鉛シートを貼り合わせた構成のガスケット材料では、
膨張黒鉛シート層の強度が４．９ＭＰａ（５０kgf／c
m2）程度と弱いため、膨張黒鉛シートを金属鋼板に接着
した後に、燃焼室孔、流体通路孔等をシールするための
ビードを後から加工して設けると、ビード凸面の膨張黒
鉛シートに傷やクラックが入り易く、また、耐油性、耐
不凍液性に劣るという問題点がある。On the other hand, a product obtained by adhering an expanded graphite sheet to the surface of a metal steel plate with an adhesive is excellent in surface roughness absorption and heat resistance of the flange surface, but the expanded graphite sheet is simply attached to the surface of the metal steel plate with an adhesive. With the gasket material of the laminated structure,
The strength of the expanded graphite sheet layer is 4.9 MPa (50 kgf / c
Since it is weak at around m 2 ), if the beads for sealing the combustion chamber holes, fluid passage holes, etc. are processed and provided after the expanded graphite sheet is bonded to the metal steel sheet, the expanded graphite sheet on the convex surface of the bead will be damaged. There is a problem that cracks easily occur and the oil resistance and antifreeze resistance are poor.
【０００５】本発明は、上記の問題を解決し、面粗度吸
収性に優れ、また、ビード加工により膨張黒鉛シート層
に発生するクラックが対策出来、更に、シール性、耐油
性、耐不凍液性、耐熱性等に優れた金属ガスケット材
料、その製造法及び金属ガスケットを提供するものであ
る。The present invention solves the above problems, is excellent in surface roughness absorption, and can prevent cracks generated in the expanded graphite sheet layer by bead processing, and further has sealing property, oil resistance and antifreeze resistance. The present invention provides a metal gasket material excellent in heat resistance, a manufacturing method thereof, and a metal gasket.
【０００６】[0006]
【課題を解決するための手段】本発明は、金属板の片面
又は両面に接着した膨張黒鉛シートの層中にゴム材を充
填した金属ガスケット材料、金属板の片面又は両面に密
度が０．１〜０．８g/cm3の膨張黒鉛シートを接着した
後、膨張黒鉛シート中にゴム溶液を含浸して熱処理し、
次いで全体を加圧して膨張黒鉛シートの密度及び厚さを
調整する金属ガスケット材料の製造法並びに該金属ガス
ケット材料をビードを有する所定形状に加工した金属ガ
スケットに関する。DISCLOSURE OF THE INVENTION According to the present invention, a metal gasket material obtained by filling a rubber material in a layer of an expanded graphite sheet adhered to one side or both sides of a metal plate, and a density of 0.1 or less on one side or both sides of the metal plate. After bonding ~ 0.8g / cm 3 expanded graphite sheet, impregnated the expanded graphite sheet with rubber solution and heat treated,
Then, the present invention relates to a method for producing a metal gasket material in which the whole is pressed to adjust the density and thickness of an expanded graphite sheet, and a metal gasket obtained by processing the metal gasket material into a predetermined shape having beads.
【０００７】本発明において、芯板となる金属板は、燃
焼ガス、水、油をシールするためのビードを加工する必
要から、バネ弾性を有する０．１〜０．３mmの厚さのも
のが好ましい。そのような金属板としては、ステンレス
鋼板、普通鋼板、アルミニウム板等を挙げることが出来
る。In the present invention, the metal plate serving as the core plate has a spring elasticity and a thickness of 0.1 to 0.3 mm because it is necessary to process a bead for sealing combustion gas, water and oil. preferable. Examples of such metal plates include stainless steel plates, ordinary steel plates, aluminum plates and the like.
【０００８】金属板に貼り合わせる膨張黒鉛シートは、
公知の方法によって得られるものが使用出来、特に制限
はない。例えば、特公昭54-33799号公報に示されるよう
に、天然黒鉛、キッシュ黒鉛、熱分解黒鉛等の高度に結
晶構造が発達した黒鉛を、濃硫酸と硝酸との混液、濃硫
酸と過マンガン酸カリウムとの混液等の強酸化性の処理
液で酸処理して黒鉛層間化合物を生成させ、これを水洗
してから急速加熱して黒鉛結晶のＣ軸方向を膨張処理し
た虫状形で圧縮特性を有する膨張黒鉛粒子を冷間加工し
たシートが用いられる。The expanded graphite sheet to be attached to a metal plate is
Those obtained by a known method can be used, and there is no particular limitation. For example, as disclosed in Japanese Examined Patent Publication No. 54-33799, natural graphite, quiche graphite, pyrolytic graphite and other graphite having a highly developed crystal structure, a mixture of concentrated sulfuric acid and nitric acid, concentrated sulfuric acid and permanganate Acid treatment with a strongly oxidizing treatment liquid such as a mixture with potassium produces a graphite intercalation compound, which is washed with water and then rapidly heated to expand in the C-axis direction of the graphite crystal A sheet obtained by cold-processing expanded graphite particles having a is used.
【０００９】膨張黒鉛シートは、密度が０．１〜０．８
g/cm3のものを使用する。０．１g/cm3未満では、芯材の
金属板と膨張黒鉛シートとを接着するための接着剤が表
面に滲み出て来る恐れがあると共に、膨張黒鉛シートの
強度が弱く取り扱い性が悪くなり、０．８g/cm3を越え
ると、接着剤から発生する揮発性ガスが逃げにくくなる
ほか、膨張黒鉛シートにゴム材が含浸し難くなる。The expanded graphite sheet has a density of 0.1 to 0.8.
Use g / cm 3 If it is less than 0.1 g / cm 3 , the adhesive for bonding the metal plate of the core material and the expanded graphite sheet may ooze out on the surface, and the strength of the expanded graphite sheet is weak and the handleability becomes poor. When it exceeds 0.8 g / cm 3 , the volatile gas generated from the adhesive becomes difficult to escape, and it becomes difficult to impregnate the expanded graphite sheet with the rubber material.
【００１０】金属板と膨張黒鉛シートとを接着する接着
剤としては、フェノール樹脂、エポキシ樹脂、エポキシ
変性フェノール樹脂、ポリイミド樹脂、ニトリル変性フ
ェノール樹脂、フラン樹脂等の熱硬化性樹脂のワニスを
用いることが好ましい。金属板に膨張黒鉛シートを接着
した後、該膨張黒鉛シートの層の中にゴム材及びゴム添
加剤をケトン等の有機溶剤に溶解又は分散したゴム溶液
を含浸する。用いられるゴム材としては弗素ゴム、ニト
リルゴム、シリコンゴム、スチレンブタジエンゴム、イ
ソプレンゴム、クロロプレンゴム、ブチルゴム、塩化ブ
チル、天然ゴム等が使用出来、耐熱的には弗素ゴムやニ
トリルゴムを使用することが好ましい。As an adhesive for adhering the metal plate and the expanded graphite sheet, a varnish of thermosetting resin such as phenol resin, epoxy resin, epoxy-modified phenol resin, polyimide resin, nitrile-modified phenol resin or furan resin is used. Is preferred. After adhering the expanded graphite sheet to the metal plate, a rubber solution in which a rubber material and a rubber additive are dissolved or dispersed in an organic solvent such as ketone is impregnated into the layer of the expanded graphite sheet. Fluorine rubber, nitrile rubber, silicon rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, butyl rubber, butyl chloride, natural rubber, etc. can be used as the rubber material, and fluorine rubber or nitrile rubber should be used for heat resistance. Is preferred.
【００１１】ゴム溶液の含浸量は、膨張黒鉛シート層全
体の重量に対してゴム材の固形分として０．５〜６０重
量％(ゴム材の充填量)となるように含浸するのが好まし
い。含浸量(ゴム材の充填量)が少ないと、ビード凸面の
膨張黒鉛シートに生ずる傷やクラックを防止し、耐油
性、耐水性を向上させる効果が小さく、多すぎると耐熱
性及びシール性が低下する。ゴム添加剤としては、硫
黄、酸化亜鉛等の加硫剤のほかに、チアゾール系化合
物、チウラム系化合物、スルフェンアミド系化合物等の
加硫促進剤を使用することが好ましい。膨張黒鉛シート
層へのゴム溶液の含浸には、ロール法、ディッピング
法、スプレー法等既知の方法が使用出来る。The amount of the rubber solution impregnated is preferably such that the solid content of the rubber material is 0.5 to 60% by weight (filling amount of the rubber material) with respect to the weight of the entire expanded graphite sheet layer. If the amount of impregnation (filling amount of rubber material) is small, it prevents scratches and cracks that occur on the expanded graphite sheet of the bead convex surface, and the effect of improving oil resistance and water resistance is small, and if it is too large, heat resistance and sealability deteriorate. To do. As the rubber additive, it is preferable to use vulcanization accelerators such as thiazole-based compounds, thiuram-based compounds and sulfenamide-based compounds, in addition to vulcanization agents such as sulfur and zinc oxide. A known method such as a roll method, a dipping method, or a spray method can be used for impregnating the expanded graphite sheet layer with the rubber solution.
【００１２】ゴム溶液を含浸後、熱処理して溶剤を除去
し、ゴム材を加硫及び硬化させて、膨張黒鉛シート層の
気孔中にゴム材を充填する。次いで、全体を加圧して膨
張黒鉛シート層の密度及び板厚を調整する。加圧後の密
度は０．８〜１．５g/cm3が好ましい。密度が小さいと
圧縮後の復元性に劣り、大きすぎると面粗度吸収性が低
下する。また、加圧後の板厚は０．０５〜０．２mmが好
ましい。板厚が薄いとシリンダーヘッドやシリンダーブ
ロックに生じた傷のシール性能が不十分となり、板厚が
厚いと耐油性や耐水性が低下し、また応力緩和が大きく
なる（へたりが生じ易い）。膨張黒鉛シート層の密度及
び板厚を調整するための加圧はロールによって行うこと
が出来る。ロールを通す際に、ロールのギャップが上記
の範囲になるように調整することにより達成出来る。上
記した製造法で得られた金属ガスケット材料を所定の形
状に加工して、燃焼ガス、水、油等をシールするための
ビードを形成した金属ガスケットを得る。なおビードの
形状については特に制限はない。After the impregnation with the rubber solution, the solvent is removed by heat treatment, the rubber material is vulcanized and cured, and the rubber material is filled in the pores of the expanded graphite sheet layer. Then, the whole is pressurized to adjust the density and plate thickness of the expanded graphite sheet layer. The density after pressing is preferably 0.8 to 1.5 g / cm 3 . If the density is low, the recoverability after compression is poor, and if it is too high, the surface roughness absorbability is reduced. The plate thickness after pressing is preferably 0.05 to 0.2 mm. If the plate thickness is thin, the sealing performance for scratches generated on the cylinder head or cylinder block will be insufficient, and if the plate thickness is large, oil resistance and water resistance will be reduced, and stress relaxation will be large (easy to settle). Pressurization for adjusting the density and plate thickness of the expanded graphite sheet layer can be performed by a roll. This can be achieved by adjusting the gap of the roll to fall within the above range when passing the roll. The metal gasket material obtained by the above-mentioned manufacturing method is processed into a predetermined shape to obtain a metal gasket having a bead for sealing combustion gas, water, oil and the like. The shape of the bead is not particularly limited.
【００１３】[0013]
【実施例】次に実施例を説明するが、本発明はこの実施
例に限定されるものではない。 実施例１ 厚さが０．２mmのＳＵＳ３０１の両面にフェノール樹脂
のワニス（日立化成工業(株)製、商品名ＶＰ−１１Ｎ）
を塗工し、該ワニス塗工面に密度が０．２g/cm3及び厚
さが０．４４mmの膨張黒鉛シート（日立化成工業(株)
製、商標名カーボフィット）を積層した。次いで、熱プ
レスで温度１８０℃、圧力１ＭＰaの条件でＳＵＳ３０
１の板の両面に膨張黒鉛シートを接着した後、ニトリル
ゴム（日本ゼオン(株)製、商品名Ｎippol１０７２
Ｊ）：硫黄粉末（細井化学(株)製、コロイド硫黄）：メ
チルエチルケトン（和光純薬工業(株)製、試薬）を１
０：３：２０重量部の比率で混合した溶液中に浸漬し、
ゴム溶液を膨張黒鉛シートの層中に含浸し、含浸後のニ
トリルゴムの重量が膨張黒鉛シートの重量に対して固形
分で２０重量％となるようにした。EXAMPLES Next, examples will be described, but the present invention is not limited to these examples. Example 1 Phenolic resin varnish (trade name: VP-11N, manufactured by Hitachi Chemical Co., Ltd.) on both sides of SUS301 having a thickness of 0.2 mm
And an expanded graphite sheet having a density of 0.2 g / cm 3 and a thickness of 0.44 mm on the surface coated with varnish (Hitachi Chemical Co., Ltd.)
(Trade name: CARBOFIT) manufactured by the manufacturer. Then, SUS30 under the conditions of a temperature of 180 ° C and a pressure of 1 MPa by hot pressing.
After adhering the expansive graphite sheets to both sides of the No. 1 plate, nitrile rubber (manufactured by Zeon Corporation, trade name Nippol1072
J): Sulfur powder (Hosoi Chemical Co., Ltd., colloidal sulfur): 1 methyl ethyl ketone (Wako Pure Chemical Industries, Ltd., reagent)
Immersing in a mixed solution of 0: 3: 20 parts by weight,
The rubber solution was impregnated into the layer of the expanded graphite sheet so that the weight of the nitrile rubber after the impregnation was 20% by weight in terms of solid content with respect to the weight of the expanded graphite sheet.
【００１４】その後、６０℃の温度に加温してメチルエ
チルケトンを揮発させた後、１６０℃の温度で１時間熱
処理を行ってゴム材を加硫及び硬化させた。次に、０．
４mmのギャップを設けたロール間を通し、全体を加圧し
て膨張黒鉛シート層の密度を１．１g/cm3及び１枚の膨
張黒鉛シートの厚さを０．１mmに調整した金属ガスケッ
ト材料を得た。図１は得られた金属ガスケット材料の断
面図であり、１はＳＵＳ３０１の金属板及び２はゴム材
を含浸した膨張黒鉛シート層である。この金属ガスケッ
ト材料を、外形が５０mm及び内径が３５mmに打ち抜くと
同時に、図２に示すように、高さが０．５mmのフルビー
ト３を直径４２mmの円状に形成して金属ガスケットを得
た。Then, after heating to a temperature of 60 ° C. to volatilize the methyl ethyl ketone, heat treatment was performed at a temperature of 160 ° C. for 1 hour to vulcanize and cure the rubber material. Next, 0.
The metal gasket material was adjusted by adjusting the density of the expanded graphite sheet layer to 1.1 g / cm 3 and the thickness of one expanded graphite sheet to 0.1 mm by pressing the whole through a roll with a gap of 4 mm. Obtained. FIG. 1 is a cross-sectional view of the obtained metal gasket material, 1 is a metal plate of SUS301 and 2 is an expanded graphite sheet layer impregnated with a rubber material. This metal gasket material was punched to have an outer diameter of 50 mm and an inner diameter of 35 mm, and at the same time, as shown in FIG. 2, a full beat 3 having a height of 0.5 mm was formed into a circular shape having a diameter of 42 mm to obtain a metal gasket.
【００１５】比較例１ 実施例１と同様のフェノール樹脂のワニスを両面に塗工
したＳＵＳ３０１に、密度が１．１g/cm3及び厚さが
０．１mmの膨張黒鉛シート（日立化成工業(株)製、商標
名カーボフィット）を積層した後、実施例１と同じ条件
で熱プレスで接着し、金属ガスケット材料を得た。この
金属ガスケット材料を実施例１と同様の形状に加工して
金属ガスケットを得た。Comparative Example 1 An expanded graphite sheet having a density of 1.1 g / cm 3 and a thickness of 0.1 mm was applied to SUS301 coated on both sides with a varnish of the same phenolic resin as in Example 1 (Hitachi Chemical Co., Ltd. ), The trade name Carbofit) were laminated and then bonded by hot pressing under the same conditions as in Example 1 to obtain a metal gasket material. This metal gasket material was processed into the same shape as in Example 1 to obtain a metal gasket.
【００１６】比較例２ 実施例１で用いた膨張黒鉛シートに替えて、厚さが２０
μｍになるように、弗素ゴム（日本ゼオン(株)製、商品
名がＮippolＣＭＦ７００）：硫黄粉末（実施例１と同
じもの）：メチルエチルケトン（和光純薬工業(株)製、
試薬）を１０：２：２０重量部の比率で混合した溶液を
ＳＵＳ３０１の両面にコーティングし、実施例１と同様
に６０℃次いで１６０℃の温度で熱処理を行ってメチル
エチルケトンを揮発させ、ゴムを加硫及び硬化させて金
属ガスケット材料を得た。この金属ガスケット材料を実
施例１と同様の形状に加工して金属ガスケットを得た。Comparative Example 2 The expanded graphite sheet used in Example 1 was replaced with a thickness of 20.
Fluorine rubber (manufactured by Nippon Zeon Co., Ltd., trade name: Nippol CMF700): sulfur powder (the same as in Example 1): methyl ethyl ketone (manufactured by Wako Pure Chemical Industries, Ltd.
Reagent) in a ratio of 10: 2: 20 parts by weight is coated on both sides of SUS301, and heat treated at a temperature of 60 ° C. and then 160 ° C. to volatilize methyl ethyl ketone and add rubber. Sulfurized and cured to obtain a metal gasket material. This metal gasket material was processed into the same shape as in Example 1 to obtain a metal gasket.
【００１７】比較例３ 比較例２で用いた弗素ゴムに替えて、ニトリルゴム（日
本ゼオン(株)製、商品名がＮippol１０７２Ｊ）を使用
した以外は比較例２と同様の工程を経て金属ガスケット
を得た。Comparative Example 3 A metal gasket was obtained through the same steps as in Comparative Example 2 except that nitrile rubber (manufactured by Nippon Zeon Co., Ltd., trade name: Nippol1072J) was used in place of the fluororubber used in Comparative Example 2. Obtained.
【００１８】次に、上記実施例及び比較例で得られた金
属ガスケットについて、ガスシール性、不凍液シール
性、耐油性、耐不凍液性及び耐熱性を測定して評価し
た。ガスシール性は、金属ガスケットを面粗さ１０Ｓの
フランジに挾み込み、３０ＭＰaの面圧で締め付け、内
径側にＮ2ガスによる内圧をかけて行き、外径側へのガ
ス洩れの有無を確認した。不凍液シール性は、金属ガス
ケットを面粗さ１０Ｓのフランジに挾み込み、３ＭＰa
の面圧で締め付け、内径側に濃度５０％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
洩れの有無を確認した。Next, the gas gaskets, antifreeze liquid sealability, oil resistance, antifreeze resistance and heat resistance of the metal gaskets obtained in the above Examples and Comparative Examples were measured and evaluated. For gas sealing, insert a metal gasket into a flange with a surface roughness of 10S, tighten it with a surface pressure of 30MPa, apply an internal pressure of N 2 gas to the inner diameter side, and check for gas leakage to the outer diameter side. did. The antifreeze sealing property is 3MPa by inserting a metal gasket into a flange with a surface roughness of 10S.
Then, the inner pressure was applied to the inner diameter side with a 50% ethylene glycol aqueous solution, and it was confirmed whether the liquid leaked to the outer diameter side.
【００１９】耐油性はＡＳＴＭ（Ａmerican Ｓociety f
or Ｔesting Ｍaterials）Ｎo.３オイル中に１５０℃で
金属ガスケットを５時間浸漬した後の圧縮破壊強度及び
重量増加率を測定した。耐不凍液性は濃度５０重量％の
エチレングリコール水溶液中に、金属ガスケットを１０
０℃で５時間浸漬した後の圧縮破壊強度及び重量増加率
を測定した。耐熱性は応力緩和率を測定して評価した。
応力緩和率は、金属ガスケットを２１．４ＭＰaの面圧
で締め付け、２００℃で２２時間熱処理した後の締め付
け力の低下率を測定した。これらの試験結果を表１に示
す。Oil resistance is ASTM (American Society f
or Testing Material) No. 3 oil was immersed in a metal gasket at 150 ° C. for 5 hours to measure the compressive fracture strength and the weight increase rate. Antifreeze resistance is 10% metal gasket in 50% by weight ethylene glycol aqueous solution.
The compressive fracture strength and the rate of weight increase after immersion at 0 ° C. for 5 hours were measured. The heat resistance was evaluated by measuring the stress relaxation rate.
As for the stress relaxation rate, the reduction rate of the tightening force was measured after the metal gasket was tightened at a surface pressure of 21.4 MPa and heat-treated at 200 ° C. for 22 hours. The results of these tests are shown in Table 1.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１から明らかなように、比較例１、比較
例２及び比較例３の金属ガスケットは、ガスシール性及
び不凍液シール性に劣り、また、耐油性、耐不凍液性及
び耐熱性の何れかが劣っていることが示される。これに
対して、実施例１の金属ガスケットは、ガスシール性、
不凍液シール性、耐油性、耐不凍液性及び耐熱性の何れ
にも優れることが示される。また、外観を観察したが、
フルビード部分の膨張黒鉛シート層の傷やクラックは比
較例１よりも小さいことが確認された。As is clear from Table 1, the metal gaskets of Comparative Example 1, Comparative Example 2 and Comparative Example 3 are inferior in gas sealability and antifreeze liquid sealability, and have any of oil resistance, antifreeze liquid resistance and heat resistance. It is shown to be inferior. On the other hand, the metal gasket of Example 1 has a gas sealing property,
It is shown that the antifreeze sealability, oil resistance, antifreeze resistance and heat resistance are all excellent. I also observed the appearance,
It was confirmed that scratches and cracks in the expanded graphite sheet layer in the full bead portion were smaller than those in Comparative Example 1.
【００２２】[0022]
【発明の効果】請求項１における金属ガスケット材料
は、ビードの部分の膨張黒鉛シート層の傷やクラックが
小さく、ガスや不凍液のシール性、耐油性、耐不凍液性
及び耐熱性に優れた金属ガスケットを提供することが出
来る。請求項２における金属ガスケット材料は、ビード
凸面の膨張黒鉛シートに生ずる傷やクラックを防止し、
耐油性、耐水性を向上させるのに効果的で、耐熱性及び
シール性が保持出来る金属ガスケットを提供できる。請
求項３における金属ガスケット材料は、シリンダーヘッ
ドやシリンダーブロックに生じた傷を十分にシールする
ことが出来、良好な耐油性、耐水性及び応力緩和性を保
持出来る金属ガスケットを提供することが出来る。請求
項４における方法により得られる金属ガスケット材料
は、シリンダーヘッドやシリンダーブロック性及び耐熱
性に優れた金属ガスケットを提供できる。請求項５にお
ける金属ガスケットは、シリンダーヘッドやシリンダー
ブロックに生じた傷を十分にシールすることが出来、良
好な耐油性、耐水性及び応力緩和性を保持することがで
きる。The metal gasket material according to claim 1 has little scratches or cracks in the expanded graphite sheet layer at the bead portion, and is excellent in gas or antifreeze sealing property, oil resistance, antifreeze resistance and heat resistance. Can be provided. The metal gasket material according to claim 2 prevents scratches and cracks generated in the expanded graphite sheet having a convex bead surface,
It is possible to provide a metal gasket that is effective in improving oil resistance and water resistance and that can maintain heat resistance and sealing properties. With the metal gasket material according to the third aspect, it is possible to provide a metal gasket that can sufficiently seal the scratches generated in the cylinder head and the cylinder block and that can maintain good oil resistance, water resistance, and stress relaxation resistance. The metal gasket material obtained by the method according to claim 4 can provide a metal gasket having excellent cylinder head and cylinder block properties and heat resistance. The metal gasket according to claim 5 can sufficiently seal the scratches generated in the cylinder head and the cylinder block, and can maintain good oil resistance, water resistance and stress relaxation property.
【図１】本発明の実施例になる金属ガスケット材料の断
面図である。FIG. 1 is a cross-sectional view of a metal gasket material according to an embodiment of the present invention.
【図２】本発明の実施例になる金属ガスケットの断面図
である。FIG. 2 is a sectional view of a metal gasket according to an embodiment of the present invention.
１…金属板、２…膨張黒鉛シート層、３…フルビート 1 ... Metal plate, 2 ... Expanded graphite sheet layer, 3 ... Full beat
フロントページの続き (72)発明者 西田 達也 茨城県日立市鮎川町三丁目３番１号 日立 化成工業株式会社山崎工場内Front page continuation (72) Inventor Tatsuya Nishida 3-3-1, Ayukawa-cho, Hitachi-shi, Ibaraki Hitachi Chemical Co., Ltd. Yamazaki factory
Claims (5)
鉛シートの層中にゴム材を充填した金属ガスケット材
料。1. A metal gasket material in which a layer of an expanded graphite sheet adhered to one side or both sides of a metal plate is filled with a rubber material.
て固形分で０．５〜６０重量％である請求項１記載の金
属ガスケット材料。2. The metal gasket material according to claim 1, wherein the filling amount of the rubber material is 0.5 to 60% by weight in terms of solid content with respect to the expanded graphite sheet.
０．２mmである請求項１又は２記載の金属ガスケット材
料。3. The expanded graphite sheet has a layer thickness of 0.05 to
The metal gasket material according to claim 1 or 2, which has a thickness of 0.2 mm.
０．８g/cm3の膨張黒鉛シートを接着した後、該膨張黒
鉛シート中にゴム溶液を含浸して熱処理し、次いで全体
を加圧して膨張黒鉛シートの密度及び厚さを調整するこ
とを特徴とする請求項１、２又は３記載の金属ガスケッ
ト材料の製造法。4. A metal plate having a density of 0.1 or more on one side or both sides.
After the 0.8g / cm 3 expanded graphite sheet is bonded, the expanded graphite sheet is impregnated with a rubber solution and heat-treated, and then the whole is pressurized to adjust the density and thickness of the expanded graphite sheet. The method for producing a metal gasket material according to claim 1, 2, or 3.
ト材料を、ビードを有する所定形状に加工した金属ガス
ケット。5. A metal gasket obtained by processing the metal gasket material according to claim 1, 2 or 3 into a predetermined shape having a bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5095595A JPH08245947A (en) | 1995-03-10 | 1995-03-10 | Metallic gasket material, its production and metallic gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5095595A JPH08245947A (en) | 1995-03-10 | 1995-03-10 | Metallic gasket material, its production and metallic gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08245947A true JPH08245947A (en) | 1996-09-24 |
Family
ID=12873254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5095595A Pending JPH08245947A (en) | 1995-03-10 | 1995-03-10 | Metallic gasket material, its production and metallic gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08245947A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308912A (en) * | 2003-04-08 | 2004-11-04 | Sgl Carbon Ag | Gasket for flange coupling |
| JP2007092828A (en) * | 2005-09-28 | 2007-04-12 | Hamagasu Kenkyusho:Kk | Engine gasket material and its manufacturing method |
| CN114623246A (en) * | 2021-12-24 | 2022-06-14 | 浙江国泰萧星密封材料股份有限公司 | Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof |
-
1995
- 1995-03-10 JP JP5095595A patent/JPH08245947A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308912A (en) * | 2003-04-08 | 2004-11-04 | Sgl Carbon Ag | Gasket for flange coupling |
| JP2007092828A (en) * | 2005-09-28 | 2007-04-12 | Hamagasu Kenkyusho:Kk | Engine gasket material and its manufacturing method |
| CN114623246A (en) * | 2021-12-24 | 2022-06-14 | 浙江国泰萧星密封材料股份有限公司 | Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof |
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