JPS60247041A - Cylindrical heat resisting gasket - Google Patents
Cylindrical heat resisting gasketInfo
- Publication number
- JPS60247041A JPS60247041A JP10238184A JP10238184A JPS60247041A JP S60247041 A JPS60247041 A JP S60247041A JP 10238184 A JP10238184 A JP 10238184A JP 10238184 A JP10238184 A JP 10238184A JP S60247041 A JPS60247041 A JP S60247041A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- expanded graphite
- cylindrical body
- nonwoven fabric
- cylindrical
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/126—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement consisting of additions, e.g. metallic fibres, metallic powders, randomly dispersed in the packing
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は内燃機関の排気マニホールドと排気管との間の
管継手に用いられる排気シール用耐熱ガスケットに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat-resistant gasket for an exhaust seal used in a pipe joint between an exhaust manifold and an exhaust pipe of an internal combustion engine.
（従来技術）
従来この目的に見合うカスケラトとしては特公昭５８−
２１１４４号公報に示＼されるように耐火材としての可
撓性黒鉛シート、マイカシートなどのシート上に補強材
としてのワイヤメツシュを配置し、これを巻回して所定
の径と高さを有する円筒状の予備成形体を形成し、これ
を金型中に入れ加圧成形することで、ワイヤメツシュ間
の目のスキ間に耐火材を充填するとともにワイヤメツシ
ュと耐火材とを強固に絡み合わせて円筒状または。(Prior art) Conventionally, as a caskerat suitable for this purpose,
As shown in Japanese Patent No. 21144, a wire mesh as a reinforcing material is placed on a sheet such as a flexible graphite sheet or a mica sheet as a fireproof material, and this is wound to form a cylinder having a predetermined diameter and height. By forming a preform in the form of a shape and pressurizing it by placing it in a mold, the gaps between the wire meshes are filled with refractory material, and the wire meshes and the refractory material are tightly intertwined to form a cylindrical shape. or.
縦断面が円孤状のガスケットとしていたが、この方法で
はワイヤメツシュとシートが共に可撓性であるため９巻
回しが難かしく、均質な成形体を得ることが難かしい欠
点があった。捷だワイヤメツシュは価格面でも高く、高
価格のシート材と併せ。Although a gasket with a circular arc shape in longitudinal section was used, this method had the disadvantage that it was difficult to wind the wire mesh and the sheet nine times, making it difficult to obtain a homogeneous molded product. Sword wire mesh is also expensive in terms of price, and is used in conjunction with high-priced sheet materials.
低価格の補強材の検討が必要とされるほかに耐火材とし
て使用される黒鉛シートは４５０℃以上になると酸化消
耗するため、高温の排気系に使用されるガスケットとし
ては、より耐熱性を向上させた材料が必要とされた。In addition to the need to consider low-cost reinforcing materials, graphite sheets used as fireproofing materials oxidize and wear out at temperatures above 450°C, so gaskets used in high-temperature exhaust systems need better heat resistance. material was required.
（発明の目的）
本発明は従来のこうした問題点を解決し、耐熱性が大幅
に改善され作業性よ＜、＠［１格的にも安価な耐熱ガス
ケットを提供することを目的とする。(Objective of the Invention) It is an object of the present invention to solve these conventional problems and provide a heat-resistant gasket that has significantly improved heat resistance and is extremely easy to work with.
（発明の構成）
本発明は、膨張黒鉛成形シートに補強芯材を載置し円筒
状に巻回後一体成形した筒状体に、酸化抑制剤を含浸熱
処理してなる筒状耐熱ガスケットに関する。(Structure of the Invention) The present invention relates to a cylindrical heat-resistant gasket formed by impregnating and heat-treating an oxidation inhibitor into a cylindrical body formed by placing a reinforcing core material on an expanded graphite molded sheet, winding it into a cylindrical shape, and then integrally molding the cylindrical body.
本発明で用いられる膨張黒鉛成形シートはカサ密度０．
００１〜０．０１ ｇ ／ａｍ”に膨張した膨張黒鉛粒
子をロールまたはプレスにてカサ密度０．３〜１、３６
／ｃｍ’、板厚０．２〜１．０ ｍｍに成形したものを
用いるのが好ましい。補強芯材としては金属ファイバー
からなる不織布をシート状に加工したものが酸化抑制剤
が含浸され易く好ましい。例えば。The expanded graphite molded sheet used in the present invention has a bulk density of 0.
Expanded graphite particles expanded to 0.001 to 0.01 g/am" are rolled or pressed to a bulk density of 0.3 to 1.36
/cm' and a plate thickness of 0.2 to 1.0 mm is preferably used. As the reinforcing core material, a nonwoven fabric made of metal fibers processed into a sheet shape is preferred because it is easily impregnated with the oxidation inhibitor. for example.
線径２０〜１００μの５ＰＨＣ材のワイヤを単位平方床
あたり、３００〜１．０００９としてブランケット状に
してからロール、またはｉ、ｏｏｏ℃程度のホットプレ
スで圧着し厚みが０．５〜２．０ｍｍ程度のシート状に
加工したものを用いる。補強芯材の材質はこれに限定す
ることはなく必要に応じＳＵＳ材、Ｃｕ材等も用いるこ
とができる。A wire of 5PHC material with a wire diameter of 20 to 100μ is made into a blanket shape with a wire diameter of 300 to 1.0009 per unit square floor, and then crimped with a roll or a hot press at about 1,000℃ to a thickness of 0.5 to 2.0mm. Use a sheet that has been processed into a sheet of about 100 ml. The material of the reinforcing core material is not limited to this, and SUS material, Cu material, etc. can also be used as necessary.
膨張黒鉛シートは最終製品のガスケット高さの約３〜５
倍の幅を有し、長さはガスケットの円周長の３〜５倍あ
ることが好ましい。また補強芯材に用いる不織布はガス
ケット高さの２〜３倍、長さがガスケットの円周長の２
〜４倍程度あればよい。The expanded graphite sheet is approximately 3 to 5 times the height of the final product gasket.
It is preferable that the gasket has a width twice that of the gasket and a length that is 3 to 5 times the circumferential length of the gasket. In addition, the nonwoven fabric used for the reinforcing core material is 2 to 3 times the height of the gasket, and the length is 2 times the circumference of the gasket.
~4 times is sufficient.
この両シートを不織布が内側にくるように合わせる。こ
の際、外周部、内周部、上端、下端は芯材の不織布が露
出せず、黒鉛シート部になるように芯材の不織布を配置
するのが好ましい。これを成形金型の中型に巻回してか
らダイス中にセットし加圧一体化して筒状体とする。こ
のときの成形圧力は２００〜１．０００ ｋｇ／ｃｍ”
が好ｔＬ＜、４００〜８００ｋｇ／ｃｍ１１が最好適で
ある。Place these two sheets together so that the nonwoven fabric is on the inside. At this time, it is preferable that the nonwoven core material is arranged so that the outer peripheral part, the inner peripheral part, the upper end, and the lower end are not exposed and become graphite sheet parts. This is wound around the middle mold of a molding die, set in a die, and integrated under pressure to form a cylindrical body. The molding pressure at this time is 200 to 1.000 kg/cm"
It is preferable that tL<, 400 to 800 kg/cm11.
本発明では耐熱性を向上させるために前記筒状体に酸化
抑制剤を含浸熱処理する。酸化抑制剤としては１例えば
オルトリン酸（ＨａＰＯ４）、メタリン酸（ＨＰＯ３）
、ビロリン酸（Ｈ４Ｐｇ０４） 、無水リン酸（Ｐ２
ｓｇ） 、 リン酸水素２ナトリウム（Ｎａ、ＨＰ ０
４ ） 。In the present invention, the cylindrical body is impregnated with an oxidation inhibitor and heat treated to improve heat resistance. Examples of oxidation inhibitors include orthophosphoric acid (HaPO4) and metaphosphoric acid (HPO3).
, birophosphoric acid (H4Pg04), phosphoric anhydride (P2
sg), disodium hydrogen phosphate (Na, HP 0
4).
リン酸２水素カリウム（ＫＨＩＩＰＯ４） 、第一リン
酸アルミニウム（ＡＩ！（＆ＰＯ４）ｇ） ＆どの水ｓ
液ｔｌニーホウ酸の水溶液が好ましい。Potassium dihydrogen phosphate (KHIIPO4), monoaluminum phosphate (AI! (&PO4) g) & which water s
An aqueous solution of liquid tl nioboric acid is preferred.
筒状体への上記水溶液の含浸け、浸漬法で十分であるが
真空注入法、Ｘ空注入加圧法等を採用してもよい。熱処
理は、いわゆる乾燥である溶液の水が筒状体から揮散す
る温度及び時間を適宜選定する。It is sufficient to impregnate the cylindrical body with the above-mentioned aqueous solution, or a dipping method, but a vacuum injection method, an X-vacuum injection pressurization method, etc. may also be employed. In the heat treatment, the temperature and time at which the water in the solution volatilizes from the cylindrical body, which is so-called drying, are appropriately selected.
（実施例） 以下実施例を説明する。(Example) Examples will be described below.
実施例１−
炭素含有率０．１５重量％の５ＰＨＣ材の丸棒を線引き
加工して得た径４０μのワイヤを１，０００℃で加圧し
て第１図に示すような板厚ｌ■、蜜度４５０９７ｍ”の
不織布のシート１を形成し、これを幅３ ｓｍｍ、長さ
３２ｏＩＩＩＩ１１に切断した。次いで密度０．８６／
ｃｍ’、 ０．５ ｍ厚みの膨張黒鉛成形シート（日立
化成工業ＫＫ製、商品名カーボフィット）を幅６ ｏｍ
ｍ、長さ７００薗に切断し、第２図に示すように上記膨
張黒鉛シート２の中央部に不織布のシート１を載置しく
骸シート２の幅方向の両側の端部、長さ方向の一端から
１０ｍｍおよび長さ方向７−ト２が内側になシ９巻終シ
の外周も膨張黒鉛成形シートで周回されるように巻回し
たのち、この巻回物をダイス中にセットしｌ圧５００ｋ
ｇ／ｃｍ９で加圧一体化し９円筒状で断面が第３図のよ
うな筒状体３を得た。Example 1 - A wire with a diameter of 40μ obtained by drawing a round bar of 5PHC material with a carbon content of 0.15% by weight was pressurized at 1,000°C to obtain a plate with a thickness of 1, as shown in Fig. 1. A nonwoven fabric sheet 1 with a density of 45,097 m'' was formed and cut into a piece with a width of 3 smm and a length of 32 mm.
cm', 0.5 m thick expanded graphite molded sheet (manufactured by Hitachi Chemical KK, trade name: Carbofit) with a width of 6 om.
The nonwoven fabric sheet 1 is placed in the center of the expanded graphite sheet 2 as shown in FIG. After winding the expanded graphite molded sheet 10 mm from one end and with the lengthwise direction 7-2 inward, the outer periphery of the 9th-volume final sheet is also wrapped around the expanded graphite molded sheet, and then the wound material is set in a die and the pressure is 1 500k
They were integrated under pressure at 9 g/cm to obtain a cylindrical body 3 having a cross section as shown in FIG.
上記、筒状体を１モル濃度のオルトリン酸（Ｈ３ＰＯ４
）水溶液中に１時間浸漬した。その後１５０℃の乾燥機
中で３時間乾燥し耐酸化処理をしたガスケットを得た。In the above, the cylindrical body was mixed with 1 molar concentration of orthophosphoric acid (H3PO4
) It was immersed in an aqueous solution for 1 hour. Thereafter, the gasket was dried for 3 hours in a dryer at 150° C. to obtain an oxidation-resistant gasket.
実施例２
実施例１で得た筒状体を５モルＳ度の第一リン酸アルミ
ニューム水溶液中に２時間浸漬し、その後１５０℃め乾
燥機中で３時間乾燥し耐酸化処理をしたガスケットを得
た。Example 2 A gasket obtained by immersing the cylindrical body obtained in Example 1 in an aqueous solution of primary aluminum phosphate of 5 mol S degree for 2 hours, and then drying it in a dryer at 150°C for 3 hours to give it anti-oxidation treatment. I got it.
実施例３
実施例１で得た筒状体を０．５モル濃度のホウ酸水溶液
に２時間浸漬し耐酸化処理をしたガスケットを得た。Example 3 The cylindrical body obtained in Example 1 was immersed in a 0.5 molar boric acid aqueous solution for 2 hours to obtain an oxidation-resistant gasket.
比較例
直径０．２５ｍｍφのＳＵＳ材の鋼線を２本よシしたニ
ット編み金網（ワイヤーメツシュ）を幅５０岨、長さ３
５０ｍに切断したものを２枚重ねて芯材とし、これを実
施例１と同じ仕様のカーポフィットに実施例１と同様に
して積重ね、以下実施例１と同様に成形金型の中型に巻
回し、ダイス中にセットして７００ ｋｇ ／ｃｍ’の
圧力で成形し、実施例１と同形状の筒状体（ガスケット
）を得た。Comparative Example A knitted wire mesh made of two SUS steel wires with a diameter of 0.25 mmφ was made with a width of 50 mm and a length of 3 mm.
Two sheets cut to 50 m were stacked to form a core material, and this was stacked on a carpo fit with the same specifications as in Example 1 in the same manner as in Example 1, and then wound around the middle of the molding die in the same manner as in Example 1. , and was set in a die and molded at a pressure of 700 kg/cm' to obtain a cylindrical body (gasket) having the same shape as in Example 1.
第１表に実施例１から３までのガスケット及び比較例の
ガスケットを６００℃、８００℃雰囲気中で加熱重量減
量率を調べた結果を示す。Table 1 shows the results of examining the heating weight loss rates of the gaskets of Examples 1 to 3 and the gaskets of Comparative Example in an atmosphere of 600°C and 800°C.
第１表 加熱重量減量率（％）
第１表から酸化抑制剤による効果が顕著にあられれてい
る。Table 1 Heating weight loss rate (%) Table 1 shows that the effect of the oxidation inhibitor is remarkable.
（発明の効果） 本発明の筒状耐熱ガスケットは芯材が安価な上。(Effect of the invention) The core material of the cylindrical heat-resistant gasket of the present invention is inexpensive.
巻回しが容易で均質な成形体が得られるとともに。It is easy to wind and a homogeneous molded product can be obtained.
成形後に酸化抑制剤が十分に含浸されるので耐酸化性に
優れ、高温の排気系にも使用可能である。Since it is sufficiently impregnated with an oxidation inhibitor after molding, it has excellent oxidation resistance and can be used in high-temperature exhaust systems.
第１図は本発明の１実施例になる筒状耐熱ガスケットに
使用する金属ファイバーよりなる不織布のシートの平面
図、第２図は第１図の不織布のシートを膨張黒鉛成形シ
ートに一体化する説明図および第３図は第２図のシート
より得られた筒状体の断面図である。
符号の説明
１・・・不織布のシート ２・・・膨張黒鉛成形シート
３・・・筒状体Fig. 1 is a plan view of a sheet of nonwoven fabric made of metal fiber used in a cylindrical heat-resistant gasket according to an embodiment of the present invention, and Fig. 2 shows the sheet of nonwoven fabric shown in Fig. 1 integrated into an expanded graphite molded sheet. The explanatory drawing and FIG. 3 are cross-sectional views of a cylindrical body obtained from the sheet of FIG. 2. Explanation of symbols 1... Nonwoven fabric sheet 2... Expanded graphite molded sheet 3... Cylindrical body
Claims (1)
熱処理してなる筒状耐熱カスケラト。 ２ 補強芯材が金属ファイバーの不織布からなるシート
である特許請求の範囲第１項記載の筒状耐熱力スケット
。 ３、酸化抑制剤がリン酸系水溶液又はホウ酸水溶液であ
る特許請求の範囲第１項又は第２項に記載の筒状耐熱ガ
スケット。[Claims] 1. A reinforcing core material is placed on an expanded graphite molded sheet. A cylindrical heat-resistant caskerato made by impregnating and heat-treating an oxidation inhibitor into a cylindrical body that is integrally formed after being rolled into a cylindrical shape. 2. The cylindrical heat-resistant socket according to claim 1, wherein the reinforcing core material is a sheet made of a nonwoven fabric of metal fibers. 3. The cylindrical heat-resistant gasket according to claim 1 or 2, wherein the oxidation inhibitor is a phosphoric acid aqueous solution or a boric acid aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10238184A JPS60247041A (en) | 1984-05-21 | 1984-05-21 | Cylindrical heat resisting gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10238184A JPS60247041A (en) | 1984-05-21 | 1984-05-21 | Cylindrical heat resisting gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60247041A true JPS60247041A (en) | 1985-12-06 |
Family
ID=14325873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10238184A Pending JPS60247041A (en) | 1984-05-21 | 1984-05-21 | Cylindrical heat resisting gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60247041A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029374U (en) * | 1988-06-30 | 1990-01-22 | ||
| WO2004024624A1 (en) * | 2002-09-04 | 2004-03-25 | Toyo Tanso Co., Ltd. | Shaped expanded graphite article and method for producing the same |
| JP2017015011A (en) * | 2015-07-01 | 2017-01-19 | 日本ピラー工業株式会社 | Exhaust pipe joint seal body |
-
1984
- 1984-05-21 JP JP10238184A patent/JPS60247041A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029374U (en) * | 1988-06-30 | 1990-01-22 | ||
| WO2004024624A1 (en) * | 2002-09-04 | 2004-03-25 | Toyo Tanso Co., Ltd. | Shaped expanded graphite article and method for producing the same |
| US8048527B2 (en) | 2002-09-04 | 2011-11-01 | Toyo Tanso Co., Ltd. | Shaped expanded graphite article and method for producing the same |
| JP2017015011A (en) * | 2015-07-01 | 2017-01-19 | 日本ピラー工業株式会社 | Exhaust pipe joint seal body |
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