JPH029637B2 - - Google Patents
Info
- Publication number
- JPH029637B2 JPH029637B2 JP57130581A JP13058182A JPH029637B2 JP H029637 B2 JPH029637 B2 JP H029637B2 JP 57130581 A JP57130581 A JP 57130581A JP 13058182 A JP13058182 A JP 13058182A JP H029637 B2 JPH029637 B2 JP H029637B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- rubber
- metal particles
- surface layer
- composition containing
- 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
- 239000002923 metal particle Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002344 surface layer Substances 0.000 claims description 10
- 238000005530 etching Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 description 14
- 238000007789 sealing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 239000013058 crude material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Material Composition (AREA)
Description
【発明の詳細な説明】
本発明はオイルシール及びその製造方法に関
し、更に詳しくは、リツプ摺動部の表面層に多数
の微小凹所を形成させることにより、寿命を長期
化させるとともに密封性を確実になしたオイルシ
ール及びその製造方法を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil seal and a method for manufacturing the same, and more specifically, the present invention relates to an oil seal and a method for manufacturing the same, and more particularly, by forming a large number of minute recesses in the surface layer of a lip sliding part, the life of the oil seal is extended and the sealing performance is improved. The present invention provides a reliable oil seal and a method for manufacturing the same.
オイルシールに長期間にわたつて安定した密封
機能を持続させるには、摺動面に被密封油による
粘性油膜を形成させ、摺動面（リツプ表面、軸周
面）を保護して摩耗を防止することが必要であ
る。ゴム部表面に微小凹所を形成させると、くさ
び作用により油膜が形成されて摩耗防止に有効で
ある。 In order for an oil seal to maintain a stable sealing function over a long period of time, a viscous oil film is formed by the oil to be sealed on the sliding surface to protect the sliding surface (lip surface, shaft circumferential surface) and prevent wear. It is necessary to. When minute depressions are formed on the surface of the rubber part, an oil film is formed by a wedge action, which is effective in preventing wear.
一方、オイルシールが密封機能を果すために
は、リツプ摺動部の油側に吸込作用を付与して、
摺動部に形成された油膜が外部へ流出するのを防
止することが必要である。この油膜吸込能力は、
第１図に示す如く、リツプ表面の油側端部の微小
凹凸と密接な関係を有している。すなわち、第１
図に示す如く、摺動部の接触幅をｂ、被密封油側
に形成された凹凸の幅をＢとすれば、第２図に示
す如く、油膜の吸込性Ｋは、Ｂ／ｂの増加に伴な
つて強化される。（SEAテクニカルペーパ
NO.708405参照）
従来のオイルシールにおいては、成形用ゴム粗
成物中に適宜な充填剤を配合し、その脱落跡に形
成された凹所及び凹凸が上記した油膜形成及び吸
込機能を果すように設定されているが充填剤の脱
落が自然かつ適度に生じるためには、ポリマーと
充填物の相性、ポリマーの強さなどが適切である
ことが必要であり、これらを適切に設定すること
はやや困難であり、又耐熱性、耐油性等の面から
ポリマーを特別のものに限定されるものにあつて
は、既存の充填剤では対応できないケースもあつ
た。 On the other hand, in order for an oil seal to perform its sealing function, a suction action must be applied to the oil side of the lip sliding part.
It is necessary to prevent the oil film formed on the sliding portion from leaking to the outside. This oil film suction capacity is
As shown in FIG. 1, there is a close relationship with the minute irregularities on the oil side end of the lip surface. That is, the first
As shown in the figure, if the contact width of the sliding part is b, and the width of the unevenness formed on the sealed oil side is B, then as shown in Figure 2, the suction property K of the oil film is an increase of B/b. It will be strengthened accordingly. (SEA Technical Paper
(Refer to NO. 708405) In conventional oil seals, an appropriate filler is blended into the molding rubber crude material, so that the recesses and irregularities formed in the place where the filler falls off perform the oil film formation and suction functions described above. However, in order for the filler to fall off naturally and appropriately, it is necessary that the compatibility between the polymer and the filler, the strength of the polymer, etc. are appropriate, and it is important to set these appropriately. This is somewhat difficult, and if the polymer is limited to a special one due to heat resistance, oil resistance, etc., there are cases in which existing fillers cannot be used.
本発明は、オイルシールの摺動部の表面層に人
為的に凹所及び凹凸を形成させて、上記した油膜
の形成による摩耗防止及び吸込作用による漏れ防
止を期するものである。すなわち、オイルシール
の成形に際し、少なくともシールリツプの摺動部
の表面層を金属粒子を配合したゴム組成物により
成形し、次いで該表面層の金属粒子に対しエツチ
ング処理を施して摺動面の凹所及び油側端部の凹
凸を形成させるものである。ゴム部分全体を金属
粒子配合の組成物を用いて成形する方法の他、第
３図及び第４図の実施例に示す如く、二材料成形
法により表面層のみを金属粒子配合の組成物を用
いて成形し、コア部を金属粒子を配合しないゴム
組成物をもつて形成することが可能である。すな
わち、第３図のオイルシールにおいては、ゴム部
の表面層１が金属粒子配合の組成部をもつて覆わ
れ、コア部２が金属粒子を配合されないゴム組成
物をもつて製せられ、リツプ端縁３の近傍が第４
図に拡大して示す如く表面に露出する金属粒子に
対しエツチング処理を施されて凹所５を形成して
いる。表面層に例えば弗素ゴム、フロロシリンゴ
ム等の如く耐熱性、耐薬品性のよいゴムに金属粒
子を配合した組成物を使用し、コア部を通常のゴ
ム組成物を使用して、シールリツプ部の硬化を防
止することができる。 The present invention aims to prevent wear due to the formation of the oil film described above and leakage due to the suction effect by artificially forming recesses and irregularities in the surface layer of the sliding portion of the oil seal. That is, when molding an oil seal, at least the surface layer of the sliding part of the seal lip is molded from a rubber composition containing metal particles, and then the metal particles in the surface layer are etched to form recesses in the sliding surface. and to form irregularities on the oil side end. In addition to a method in which the entire rubber part is molded using a composition containing metal particles, only the surface layer can be molded using a composition containing metal particles using a two-material molding method, as shown in the examples in FIGS. 3 and 4. It is possible to form the core part using a rubber composition containing no metal particles. That is, in the oil seal shown in FIG. 3, the surface layer 1 of the rubber part is covered with a composition containing metal particles, and the core part 2 is made of a rubber composition containing no metal particles. Near edge 3 is the fourth
As shown in the enlarged view, the metal particles exposed on the surface are etched to form recesses 5. For the surface layer, a composition containing metal particles in a rubber with good heat resistance and chemical resistance, such as fluororubber or fluorosilin rubber, is used, and for the core part, a normal rubber composition is used. Curing can be prevented.
発明者等は、シリコンゴム100部に金属粉と
して粒子径が10〜50μmの分布をもつガス噴霧状
銅粉を30部及び加硫剤等の配合剤を添加してゴム
材料を得、これをシート状金型にて成形し、
180℃で５分間加硫して加硫ゴムシートを得、
この加硫ゴムシートを酸素プラズマで15分間処理
して表面ゴム部分を除去して銅粉を表面に露出さ
せ（0.2トール、50ワツトで15分間）、FeCl335
ｇ／（水）なる組成のエツチング液、
（NH4）2S2O812ｇ／（水）なる組成のエツチン
グ液、CuCl227ｇ／（水）なる組成のエツチン
グ液又はCrO326ｇ／（水）なる組成のエツチ
ング液のいずれか一つに浸漬し、室温で15分間エ
ツチング処理し、水洗乾燥後、表面を観測し
て、銅粉がエツチング除去されてほゞ球形の凹所
が多数（120〜160ケ／mm2）存在していることを確
認した。 The inventors obtained a rubber material by adding 30 parts of gas-atomized copper powder with a particle size distribution of 10 to 50 μm as a metal powder and compounding agents such as a vulcanizing agent to 100 parts of silicone rubber. Molded in a sheet mold,
Vulcanize at 180℃ for 5 minutes to obtain a vulcanized rubber sheet.
This vulcanized rubber sheet was treated with oxygen plasma for 15 minutes to remove the surface rubber part and expose the copper powder on the surface (0.2 Torr, 50 Watts for 15 minutes), and then treated with FeCl 3 35
An etching solution with a composition of g/(water),
Any one of the following: (NH 4 ) 2 S 2 O 8 12 g/(water) etching solution, CuCl 2 27 g/(water), or CrO 3 26 g/(water). After soaking in water and etching at room temperature for 15 minutes, washing with water and drying, the surface was observed and found that the copper powder had been etched away and there were many approximately spherical depressions (120 to 160/mm 2 ). It was confirmed.
又、ゴムとして弗素ゴムを用い、金属粉として
粉末冶金用の噴霧鉄粉（粘度10〜40μm）を10部
添加し、上記第１実施例におけるないしの処
理を施し、その結果ゴム表面に原料鉄粉の形状に
酷似した凹所が多数形成されていることを確認し
た。 In addition, fluororubber was used as the rubber, 10 parts of atomized iron powder for powder metallurgy (viscosity 10 to 40 μm) was added as the metal powder, and the treatment described in the first embodiment was carried out, so that the raw material iron was formed on the rubber surface. It was confirmed that many depressions were formed that closely resembled the shape of the powder.
本発明によるオイルシールは上記した如く、シ
ールリツプの摺動部表面に金属粒子に対するエツ
チング処理により多数の凹所を形成しているため
に、該凹所のくさび作用により油膜が引込まれる
ので摺動部の摩耗が抑止されてシール装置の寿命
が長期化され、更に上記した凹所が接触部の油側
端部において凹凸を形成して吸込性を生起させる
ので、外部への油の流出を防止して良好な密封性
を示す。 As described above, the oil seal according to the present invention has a large number of recesses formed on the surface of the sliding portion of the seal lip by etching metal particles, and the oil film is drawn in by the wedge action of the recesses. The wear of the contact area is suppressed, extending the life of the sealing device.Furthermore, the above-mentioned recesses form unevenness at the oil side end of the contact area to create suction properties, preventing oil from leaking to the outside. shows good sealing performance.
第１図及び第２図はシールリツプ部の密封機能
を示す模型図及び線図、第３図及び第４図は本発
明によるオイルシールの構造を示す断面図であ
る。
１…表面層、２…コア部、３…リツプ端縁、５
…凹所。
1 and 2 are model diagrams and diagrams showing the sealing function of the seal lip portion, and FIGS. 3 and 4 are sectional views showing the structure of the oil seal according to the present invention. 1... Surface layer, 2... Core portion, 3... Lip edge, 5
...concavity.
Claims (1)
物をもつて成形し、エツチング処理により表面層
に微小凹所を形成させたオイルシール。 ２ 少なくともシールリツプの摺動部の表面層が
金属粒子配合の組成物をもつて形成される如くに
成形する工程及び前記シールリツプ摺動部に対し
エツチング処理を施して微小凹所を形成させる工
程を含むオイルシールの製造方法。[Scope of Claims] 1. An oil seal in which the sliding portion of the seal lip is molded using a composition containing metal particles, and minute recesses are formed in the surface layer by etching treatment. 2. At least a step of forming the surface layer of the sliding portion of the seal lip with a composition containing metal particles, and a step of etching the sliding portion of the seal lip to form minute recesses. Method of manufacturing oil seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57130581A JPS5920375A (en) | 1982-07-27 | 1982-07-27 | Oil seal and its preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57130581A JPS5920375A (en) | 1982-07-27 | 1982-07-27 | Oil seal and its preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5920375A JPS5920375A (en) | 1984-02-02 |
| JPH029637B2 true JPH029637B2 (en) | 1990-03-02 |
Family
ID=15037632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57130581A Granted JPS5920375A (en) | 1982-07-27 | 1982-07-27 | Oil seal and its preparation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920375A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0759696B2 (en) * | 1988-12-14 | 1995-06-28 | 株式会社荒井製作所 | Peripheral metal fitting type sealant for Oyseal |
| US5249861A (en) * | 1991-07-18 | 1993-10-05 | Kusel Equipment Co. | Apparatus for cooling, washing, draining, and blending liquid suspended materials |
| GB2461891A (en) * | 2008-07-16 | 2010-01-20 | Walker & Co James Ltd | An elastomeric seal having high resistance to rapid gas decompression |
-
1982
- 1982-07-27 JP JP57130581A patent/JPS5920375A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5920375A (en) | 1984-02-02 |
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