JPH0830539B2 - Oil seal manufacturing method - Google Patents
Oil seal manufacturing methodInfo
- Publication number
- JPH0830539B2 JPH0830539B2 JP62057811A JP5781187A JPH0830539B2 JP H0830539 B2 JPH0830539 B2 JP H0830539B2 JP 62057811 A JP62057811 A JP 62057811A JP 5781187 A JP5781187 A JP 5781187A JP H0830539 B2 JPH0830539 B2 JP H0830539B2
- Authority
- JP
- Japan
- Prior art keywords
- resin material
- oil seal
- rubber
- support
- elastic material
- 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
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はオイルシールの製造方法、特に、リップしゅ
う動面に樹脂、例えば４フッ化エチレン樹脂（テフロ
ン）を接着するオイルシールの製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing an oil seal, and more particularly to a method for producing an oil seal in which a resin, for example, tetrafluoroethylene resin (Teflon) is adhered to a lip sliding surface. .
従来のオイルシールの製造方法を第４図を参照して説
明する。第４図を参照すると、成形型の成形キャビティ
２にゴム状弾性体素材を配置し、前の製造工程で加熱さ
れている成形型１の成形キャビティ２に隣接した台座20
上に環状の樹脂素材３を配置する。樹脂素材３を台座20
上に配置後、成形型１の上型４と下型５とを閉鎖するこ
とによってゴム弾性体素材を加硫・成形してオイルシー
ルの耐熱性，耐圧性，耐摩耗性を向上させるため樹脂素
材３をリップしゅう動面６に接着するようになってい
る。A conventional method for manufacturing an oil seal will be described with reference to FIG. Referring to FIG. 4, a rubber-like elastic material is placed in the molding cavity 2 of the molding die, and the pedestal 20 is adjacent to the molding cavity 2 of the molding die 1 heated in the previous manufacturing process.
An annular resin material 3 is arranged on the top. 20 resin base 3
After arranging on top, the upper and lower molds 4 and 5 of the mold 1 are closed to vulcanize and mold the rubber elastic material to improve the heat resistance, pressure resistance, and wear resistance of the oil seal. The material 3 is adhered to the lip sliding surface 6.
〔発明が解決しようとする問題点〕 ところで、成形型１の台座20上に環状の樹脂素材３を
載置する際、成形型が前の工程のオイルシールを製造す
るために加熱されており、その熱によって樹脂素材３が
熱膨張して外周縁が半径方向に延びるため成形後、リッ
プしゅう動面に接着された樹脂素材３の所定位置からの
ずれ17を生じる。又、樹脂素材３が台座20に確実に位置
決めされていないために成形の際樹脂素材３が所定位置
からずれることもある。これによって接着部材のずれ17
（第５図参照）を生じ、その結果、リップ部の耐熱性，
耐圧性等の物理特性を低下させるという問題があった。
特に、熱膨張による伸びの場合オイルシールの直径が大
きくなればなるほどそのずれが大きくなるという傾向が
ある。[Problems to be Solved by the Invention] By the way, when the annular resin material 3 is placed on the pedestal 20 of the molding die 1, the molding die is heated to manufacture the oil seal in the previous step, The heat causes the resin material 3 to thermally expand and the outer peripheral edge to extend in the radial direction, so that after molding, the resin material 3 adhered to the lip sliding surface is displaced 17 from a predetermined position. Further, since the resin material 3 is not reliably positioned on the pedestal 20, the resin material 3 may be displaced from a predetermined position during molding. Due to this, the displacement of the adhesive member 17
(See FIG. 5), resulting in heat resistance of the lip,
There is a problem that physical properties such as pressure resistance are deteriorated.
In particular, in the case of elongation due to thermal expansion, the deviation tends to increase as the diameter of the oil seal increases.
本発明は、上記問題に鑑みなされたもので、その目的
とする処は、樹脂素材を確実に位置決めすると同時に樹
脂素材が熱膨張で変形して伸び所定位置からずれること
によってリップ部のシール機能が低下することを防止
し、オイルシールの不良品を排除し得るオイルシールの
製造方法を提供するにある。The present invention has been made in view of the above problems, and a purpose thereof is to reliably position a resin material and at the same time, the resin material is deformed by thermal expansion and is stretched and deviated from a predetermined position to thereby provide a sealing function of a lip portion. Another object of the present invention is to provide a method for producing an oil seal that can prevent the deterioration of the oil seal and eliminate defective oil seals.
前記目的は、本発明によれば環状樹脂素材の内周縁を
上部支持体と下部支持体とからなるおさえ治具で挟持固
定した後、成形型内の所定位置に配置する工程と、前記
環状樹脂素材を固定した状態でゴム状弾性素材を流動さ
せて加硫成形し、前記環状樹脂素材とゴム状弾性素材と
を接着する工程と、前記環状樹脂素材とゴム状弾性素材
との余剰部分を切断する工程とからなるオイルシールの
製造方法によって達成される。According to the present invention, the object is to clamp and fix the inner peripheral edge of the annular resin material with a holding jig composed of an upper support and a lower support, and then dispose at a predetermined position in a molding die, and the annular resin Flowing and vulcanizing the rubber-like elastic material with the material fixed, and a step of adhering the annular resin material and the rubber-like elastic material, and cutting an excess portion of the annular resin material and the rubber-like elastic material It is achieved by a method for manufacturing an oil seal, which comprises the steps of:
リップしゅう動面を備えるゴム状弾性体素材を成形型
の成形キャビティ内に配置する。次に円環状の上部支持
体と下部支持体とでリップしゅう動面に接着するための
環状樹脂素材の内周縁を固定して、成形型内の所定位置
に位置決めする。次に環状樹脂素材の伸びを上部支持体
と下部支持体とによって抑えながらゴム状弾性体素材を
加硫成形してゴム状弾性体素材に環状樹脂素材を一体に
接着する。上部支持体と下部支持体とによって、樹脂素
材が正確に位置決めされ、半径方向の内周縁を固定する
ため、加硫成形時に樹脂素材が熱膨張して変形して半径
方向外側へ伸びることが防止される。その後、環状樹脂
素材とゴム状弾性体素材の余剰部分を切断する。A rubber-like elastic material having a lip sliding surface is placed in a molding cavity of a molding die. Next, the inner peripheral edge of the annular resin material for adhering to the lip sliding surface is fixed by the annular upper support and the lower support and positioned at a predetermined position in the molding die. Next, the rubber-like elastic material is vulcanized while the elongation of the annular resin material is suppressed by the upper support and the lower support, and the annular resin material is integrally bonded to the rubber-like elastic material. The upper support and the lower support accurately position the resin material and fix the inner peripheral edge in the radial direction, preventing the resin material from thermally expanding and deforming during vulcanization molding and extending outward in the radial direction. To be done. After that, excess portions of the annular resin material and the rubber-like elastic material are cut.
以下に本発明を図示の実施例に基づいて説明する。ま
ず第１図を参照すると、本発明による上部支持体８と下
部支持体９（以下、２つ合わせて単に支持体７と称す）
はそれぞれ円環状である。上部支持体８の先端部は、傾
斜面10を有し、ゴム状弾性体素材の成形時にゴム状弾性
体素材のリップしゅう動面６に当接するようになってい
る。樹脂素材３例えば４フッ化エチレン樹脂３は、上部
支持体８と下部支持体９との間に配置される。上部支持
体８の先端部の下面11と下部支持体９の先端部の上面12
には凸部13と凹部14が夫々設けられている。又、上部支
持体８と下部支持体９を樹脂素材３を間に挟んで固定す
るボルト等の固定用部品を通すための孔15,16が設けら
れている。この孔15,16は、円環状の支持体７の円周上
に複数個設けられている。上部支持体８と下部支持体９
との凹凸部分は下面11と上面12が平坦である場合に比し
て樹脂素材３に対して半径方向内側に向かう引張りを与
えるように形成されている。Hereinafter, the present invention will be described based on the illustrated embodiment. First, referring to FIG. 1, an upper support 8 and a lower support 9 according to the present invention (hereinafter, the two are collectively referred to as a support 7).
Are each annular. The tip end of the upper support 8 has an inclined surface 10 so as to come into contact with the lip sliding surface 6 of the rubber-like elastic material when the rubber-like elastic material is molded. The resin material 3, for example, the tetrafluoroethylene resin 3 is arranged between the upper support 8 and the lower support 9. Lower surface 11 of the tip of upper support 8 and upper surface 12 of the tip of lower support 9
A convex portion 13 and a concave portion 14 are provided in each. Further, holes 15 and 16 for passing fixing parts such as bolts for fixing the upper support 8 and the lower support 9 with the resin material 3 sandwiched therebetween are provided. A plurality of holes 15 and 16 are provided on the circumference of the annular support 7. Upper support 8 and lower support 9
The concave and convex portions are formed so as to give a tensile force to the resin material 3 inward in the radial direction as compared with the case where the lower surface 11 and the upper surface 12 are flat.
このように構成されたオイルシール製造装置によれ
ば、まず環状の樹脂素材３を上部支持体８と下部支持体
９との間に配置し、ボルト18で固定する。その結果、環
状の樹脂の内周縁が上部支持体８と下部支持体９で挟持
され固定される。その後、成形型の上型４と下型５との
間の所定の位置に挿入され位置決めされる。次に、成形
型１を作動させて、環状樹脂素材の伸びを支持体７によ
って抑えつつ予め成形型１内に配置されたゴム弾性素材
21を加硫・成形して、樹脂素材３をゴム状弾性体素材21
のリップしゅう動面６に接着する。最後に、上記環状樹
脂素材３とゴム状弾性体素材21の余剰部分を斜線部22で
切断する。又、支持体７を複数個作っておき、常に常温
時に樹脂素材３を固定するのが好ましい。すなわち、一
度使用した治具は、次のオイルシールの製造工程では使
用せずに、別の治具を使用すれば樹脂素材の固定は常に
常温で行なわれ得、樹脂素材３の設定時の熱膨張を防止
し得る。第２図には支持体７を用いた成形前のオイルシ
ールを、第３図には成形後のオイルシールを示す。According to the oil seal manufacturing apparatus configured as described above, first, the annular resin material 3 is arranged between the upper support 8 and the lower support 9 and fixed by the bolt 18. As a result, the inner peripheral edge of the annular resin is sandwiched and fixed by the upper support 8 and the lower support 9. Then, the mold is inserted and positioned at a predetermined position between the upper mold 4 and the lower mold 5. Next, the molding die 1 is actuated, and the rubber elastic material preliminarily arranged in the molding die 1 while suppressing the elongation of the annular resin material by the support 7.
21 is vulcanized and molded, and the resin material 3 is rubber-like elastic material 21
Adhere to the lip sliding surface 6 of. Finally, the excess portion of the annular resin material 3 and the rubber-like elastic material 21 is cut along the shaded portion 22. Further, it is preferable to prepare a plurality of supports 7 and always fix the resin material 3 at room temperature. That is, if the jig used once is not used in the next oil seal manufacturing process, but a different jig is used, the resin material can be fixed at room temperature at all times, and the heat generated when the resin material 3 is set is fixed. Expansion can be prevented. 2 shows an oil seal before molding using the support 7, and FIG. 3 shows an oil seal after molding.
本発明によれば、位置決めされた環状樹脂素材の伸び
を上部支持体と下部支持体とによって抑えた状態にて、
ゴム状弾性体素材を、加硫成形してゴム状弾性体素材に
環状樹脂素材を一体に接着するので、環状樹脂素材の熱
膨張，ゴム流動による伸びが発生せず、環状樹脂素材の
伸びを確実に防止でき、所定位置からずれることなく安
定した状態にてゴム状弾性体素材と一体に接着できるこ
とによって、リップ摺動面の形状が安定することにより
リップ部のシール機能が低下することを防止しオイルシ
ールの不良品を排除し得る。更に、複数個の支持体を順
次使用すれば、予め支持体に樹脂素材を設定することが
できるので成形型にその都度樹脂素材を設定する時間を
短縮することができるので生産効率を上げることができ
る。According to the present invention, the elongation of the positioned annular resin material is suppressed by the upper support and the lower support,
Since the rubber-like elastic material is vulcanized and the annular resin material is integrally bonded to the rubber-like elastic material, the expansion of the annular resin material does not occur due to thermal expansion of the annular resin material and rubber flow. It can be surely prevented, and can be integrally bonded to the rubber-like elastic material in a stable state without shifting from the predetermined position, preventing the lip sliding function from deteriorating due to the stable shape of the lip sliding surface. It is possible to eliminate defective oil seals. Further, if a plurality of supports are used in sequence, the resin material can be set in advance on the support, so that the time for setting the resin material in the molding die each time can be shortened, so that the production efficiency can be improved. it can.
第１図は、本発明による上部支持体と下部支持体の縦断
面図、第２図は、上部支持体と下部支持体の成形前の成
形型での位置を示す縦断面図、第３図は、成形後の上部
支持体と下部支持体の位置を示す縦断面図、第４図は、
従来例のオイルシールの製造方法を示す縦断面図及び第
５図は、従来のオイルシールの製造方法によって製造さ
れたオイルシールの縦断面図である。 符号の説明 １……成形型、２……成形用キャビティ 3:環状樹脂素材、４……上型 ５……下型、７……支持体 ８……上部支持体、９……下部支持体 10……傾斜面FIG. 1 is a vertical cross-sectional view of an upper support and a lower support according to the present invention, and FIG. 2 is a vertical cross-sectional view showing positions of the upper support and the lower support in a molding die before molding, and FIG. Is a vertical sectional view showing the positions of the upper support and the lower support after molding, and FIG.
FIG. 5 is a vertical cross-sectional view showing a conventional oil seal manufacturing method and FIG. 5 is a vertical cross-sectional view of an oil seal manufactured by the conventional oil seal manufacturing method. Explanation of symbols 1 ... Mold, 2 ... Mold cavity 3: Annular resin material, 4 ... Upper mold, 5 ... Lower mold, 7 ... Support body, 8 ... Upper support body, 9 ... Lower support body 10 ... Slope
Claims (2)
支持体とからなるおさえ治具で挟持固定した後、成形型
内の所定位置に配置する工程と、 前記環状樹脂素材を固定した状態でゴム状弾性素材を流
動させて加硫成形し、前記環状樹脂素材とゴム状弾性素
材とを一体に接着する工程と、 前記環状樹脂素材及びゴム状弾性素材の余剰部分を切断
する工程とからなるオイルシールの製造方法。1. A step of sandwiching and fixing an inner peripheral edge of a ring-shaped resin material with a holding jig composed of an upper support and a lower support, and then arranging the ring-shaped resin material at a predetermined position, and fixing the ring-shaped resin material. Vulcanization molding by flowing the rubber-like elastic material in a state, a step of integrally bonding the annular resin material and the rubber-like elastic material, and a step of cutting an excessive portion of the annular resin material and the rubber-like elastic material Of manufacturing an oil seal consisting of.
面には互いに共同する凹凸部を有し、樹脂素材を固定す
ることを特徴とする特許請求の範囲第１項に記載のオイ
ルシールの製造方法。2. The oil seal according to claim 1, wherein the lower surface of the upper support and the upper surface of the lower support have concavo-convex portions that cooperate with each other to fix a resin material. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057811A JPH0830539B2 (en) | 1987-03-12 | 1987-03-12 | Oil seal manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057811A JPH0830539B2 (en) | 1987-03-12 | 1987-03-12 | Oil seal manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63225765A JPS63225765A (en) | 1988-09-20 |
| JPH0830539B2 true JPH0830539B2 (en) | 1996-03-27 |
Family
ID=13066306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62057811A Expired - Lifetime JPH0830539B2 (en) | 1987-03-12 | 1987-03-12 | Oil seal manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0830539B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0565507U (en) * | 1992-02-24 | 1993-08-31 | エヌオーケー株式会社 | Mold |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5851964U (en) * | 1981-10-06 | 1983-04-08 | 日新製鋼株式会社 | polishing jig |
| JPS5893854U (en) * | 1981-12-21 | 1983-06-25 | 大成道路株式会社 | Jig for direct tensile testing of concrete specimens |
| JPS60227064A (en) * | 1985-04-04 | 1985-11-12 | フエデラル・モーギユル・コーポレーシヨン | Radial lip seal and production unit thereof |
-
1987
- 1987-03-12 JP JP62057811A patent/JPH0830539B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63225765A (en) | 1988-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |