JPS6246749B2 - - Google Patents
Info
- Publication number
- JPS6246749B2 JPS6246749B2 JP58081385A JP8138583A JPS6246749B2 JP S6246749 B2 JPS6246749 B2 JP S6246749B2 JP 58081385 A JP58081385 A JP 58081385A JP 8138583 A JP8138583 A JP 8138583A JP S6246749 B2 JPS6246749 B2 JP S6246749B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing ring
- oil seal
- mold
- peripheral surface
- inner peripheral
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 description 10
- 238000000465 moulding Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/328—Manufacturing methods specially adapted for elastic sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Description
【発明の詳細な説明】
本発明は、オイルシールの耐圧性を向上させる
ために、耐圧性に優れた樹脂材製の補強環とゴム
状弾性材から成るオイルシール本体を一体成形す
るオイルシールの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION In order to improve the pressure resistance of the oil seal, the present invention provides an oil seal in which a reinforcing ring made of a resin material with excellent pressure resistance and an oil seal main body made of a rubber-like elastic material are integrally molded. This relates to a manufacturing method.
従来、この種のオイルシールの製造方法は、第
５図に示す様にオイルシール本体１を形成するゴ
ム状弾性材が樹脂材製の補強環２の内周面に漏出
（漏出部Ａ）するので一体成形することができな
かつた。そこで、オイルシール本体１と補強環２
を別々に製作し、組立てを行い一体化していた。 Conventionally, in the manufacturing method of this type of oil seal, as shown in FIG. 5, the rubber-like elastic material forming the oil seal body 1 leaks onto the inner peripheral surface of the reinforcing ring 2 made of resin material (leakage part A). Therefore, it was not possible to mold it in one piece. Therefore, oil seal body 1 and reinforcing ring 2
were manufactured separately, assembled and integrated.
この様な従来方法では組立て工程に極めて時間
がかかり、製造工程も複雑であつた。 In such conventional methods, the assembly process was extremely time consuming and the manufacturing process was also complicated.
本発明は上記従来技術の問題点に鑑み成された
もので、ゴム状弾性材から成るオイルシール本体
と樹脂材製の補強環を一体成形することにより、
製造工程を単純化し、製造時間を短縮することを
目的とするものである。 The present invention has been made in view of the problems of the prior art described above, and by integrally molding an oil seal body made of a rubber-like elastic material and a reinforcing ring made of a resin material,
The purpose is to simplify the manufacturing process and shorten manufacturing time.
本発明は、上記目的を達成するために、以下の
構成を有する。すなわち、樹脂材料から成る補強
環がゴム状弾性材から成るオイルシール本体の内
周面から背面に至る断面略Ｌ字状を呈し、該補強
環の成形型内周面と嵌合する補強環内周面が前記
成形型内周面に対しテーパ角度を大きく形成され
ると共に、前記成型内周面に形成された複数個の
三角状の突起に嵌合する溝が設けられ、オイルシ
ール本体を形成するゴム状弾性部材と共に成形型
内に装着され一体成形されることを特徴とするオ
イルシールの製造方法である。 In order to achieve the above object, the present invention has the following configuration. That is, a reinforcing ring made of a resin material has a substantially L-shaped cross section extending from the inner circumferential surface of the oil seal body to the back surface of the oil seal body made of a rubber-like elastic material, and the inner circumferential surface of the reinforcing ring fits into the inner circumferential surface of the mold. The peripheral surface is formed at a large taper angle with respect to the inner peripheral surface of the mold, and grooves are provided that fit into the plurality of triangular protrusions formed on the inner peripheral surface of the mold, forming an oil seal body. This method of manufacturing an oil seal is characterized in that the oil seal is mounted in a mold together with a rubber-like elastic member and integrally molded.
以下、図面に基づき本発明の第１の実施例を説
明する。 Hereinafter, a first embodiment of the present invention will be described based on the drawings.
第１図において、成形型は、成形上型３、成形
中型４及び成形下型５から構成され、空間６が形
成されている。樹脂材料から成る断面略Ｌ字状の
補強環２は、成形型内周面７に嵌合され、補強環
２の背面８が空間６の底面９に接する如くに空間
６内に装着される。補強環内周面１０は、成形型
内周面７に対しテーパ角度を大きく形成されると
共に、成形型内周面７に形成された複数個の三角
形状の突起１１に嵌合する三角状の溝１２が設け
られている。したがつて、補強環内周面１０と成
形型内周面７の接触面間には、補強環２の円筒部
１３の弾性変形に起因するシール圧力が生起され
る。空間６内には、補強環２と共に、オイルシー
ル本体１を形成するゴム状弾性材が装着され、成
形上型３により加圧し、成形型全体を加熱するこ
とによりオイルシールが一体成形される（第２図
参照）。この成形時に、ゴム状弾性材の補強環内
周面１０上への漏出は、補強環内周面１０上に形
成された三角状の溝１２によつて効果的に阻止さ
れる。すなわち、補強環２の円筒部１３の弾性変
形に起因するシール圧力が、三角状の溝１２の近
傍に集中して作用し、ゴム状弾性材の補強環内周
面１０上への漏出が阻止されるのである。補強環
内周面１０のテーパ角度は、成形型内周面７のテ
ーパ角度よりも約４゜〜５゜程度大きく形成され
ることが好ましい。補強環内周面１０上に形成さ
れる複数個の溝１２は、円筒部１３の先端に最も
近い溝でゴム状弾性材製の漏出を阻止するため、
先端に最も近い溝の大きさが他の溝よりも大きく
形成されている。第３図は、本発明の第２の実施
例を示すものであり、成形型内周面７に段部１４
が形成されている以外、前記実施例と同様の構成
から成つている。この実施例によれば、段部１４
の存在により、補強環２の成形型内周面７への嵌
合が確実に成されると共に、溝１２と同様にゴム
状弾性材が補強環内周面７上に漏出することを阻
止することができるものである。第４図は、本発
明の第３の実施例を示すものであり、補強環２の
円筒部１３を長くすることにより、補強環２がリ
ツプを形成する態様とすることができるものであ
る。 In FIG. 1, the mold is composed of an upper mold 3, a middle mold 4, and a lower mold 5, and a space 6 is formed. A reinforcing ring 2 made of a resin material and having a substantially L-shaped cross section is fitted into the inner circumferential surface 7 of the mold and installed in the space 6 such that the back surface 8 of the reinforcing ring 2 is in contact with the bottom surface 9 of the space 6. The inner peripheral surface 10 of the reinforcing ring is formed with a large taper angle with respect to the inner peripheral surface 7 of the mold, and has a triangular shape that fits into a plurality of triangular protrusions 11 formed on the inner peripheral surface 7 of the mold. A groove 12 is provided. Therefore, a sealing pressure due to the elastic deformation of the cylindrical portion 13 of the reinforcing ring 2 is generated between the contact surfaces of the reinforcing ring inner circumferential surface 10 and the molding die inner circumferential surface 7. A rubber-like elastic material forming the oil seal body 1 is installed in the space 6 together with the reinforcing ring 2, and the oil seal is integrally molded by applying pressure with the upper mold 3 and heating the entire mold ( (See Figure 2). During this molding, leakage of the rubber-like elastic material onto the inner peripheral surface 10 of the reinforcing ring is effectively prevented by the triangular groove 12 formed on the inner peripheral surface 10 of the reinforcing ring. That is, the sealing pressure caused by the elastic deformation of the cylindrical portion 13 of the reinforcing ring 2 acts in a concentrated manner near the triangular groove 12, thereby preventing the rubber-like elastic material from leaking onto the inner peripheral surface 10 of the reinforcing ring. It will be done. It is preferable that the taper angle of the inner peripheral surface 10 of the reinforcing ring is larger than the taper angle of the inner peripheral surface 7 of the mold by about 4° to 5°. The plurality of grooves 12 formed on the inner circumferential surface 10 of the reinforcing ring are the grooves closest to the tip of the cylindrical part 13, and are made of a rubber-like elastic material to prevent leakage.
The groove closest to the tip is larger than the other grooves. FIG. 3 shows a second embodiment of the present invention, in which a stepped portion 14 is provided on the inner circumferential surface 7 of the mold.
The structure is similar to that of the previous embodiment except that . According to this embodiment, the stepped portion 14
The presence of the reinforcing ring 2 ensures that the reinforcing ring 2 is fitted onto the inner circumferential surface 7 of the mold, and, like the groove 12, prevents the rubber-like elastic material from leaking onto the inner circumferential surface 7 of the reinforcing ring. It is something that can be done. FIG. 4 shows a third embodiment of the present invention, in which the reinforcing ring 2 can form a lip by lengthening the cylindrical portion 13 of the reinforcing ring 2.
本発明は、上記構成を有する結果以下の効果を
奏するものである。 As a result of having the above configuration, the present invention has the following effects.
すなわち、補強環内周面のテーパ角度が、成形
型内周面のテーパ角度よりも大きく形成されると
共に、補強環内周面上に成形型内周面上に形成さ
れた複数個の三角状の突起と嵌合する三角状の溝
が設けられていることにより、補強環内周面上へ
のゴム状弾性材の漏出が防止されるため、補強環
とオイルシールの一体成形が可能となつた。した
がつて、従来方法に比較し製造工程が単純化さ
れ、製造に要する時間も短縮されるものである。 In other words, the taper angle of the inner peripheral surface of the reinforcing ring is larger than the taper angle of the inner peripheral surface of the mold, and a plurality of triangular shapes are formed on the inner peripheral surface of the reinforcing ring on the inner peripheral surface of the mold. The triangular groove that fits into the protrusion prevents the rubber-like elastic material from leaking onto the inner peripheral surface of the reinforcing ring, making it possible to integrally mold the reinforcing ring and oil seal. Ta. Therefore, compared to conventional methods, the manufacturing process is simplified and the time required for manufacturing is also shortened.
第１図乃至第２図は本発明の第１の実施例を表
す断面図、第３図は本発明の第２の実施例を表す
断面図、第４図は本発明の第３の実施例を表す断
面図、第５図は従来例である。
３……成形上型、４……成形中型、５……成形
下型、６……空間、７……成形型内周面、８……
背面、９……底面、１０……補強環内周面、１１
……突起、１２……溝、１３……円筒部、１４…
…段部、Ａ……漏出部。
1 and 2 are sectional views showing a first embodiment of the invention, FIG. 3 is a sectional view showing a second embodiment of the invention, and FIG. 4 is a sectional view showing a third embodiment of the invention. A cross-sectional view showing FIG. 5 is a conventional example. 3... Upper mold, 4... Middle mold, 5... Lower mold, 6... Space, 7... Inner peripheral surface of the mold, 8...
Back surface, 9...Bottom surface, 10...Inner peripheral surface of reinforcing ring, 11
...Protrusion, 12...Groove, 13...Cylindrical portion, 14...
...Stepped section, A...Leakage section.
Claims (1)
と樹脂材料から成る補強環２を一体成形するオイ
ルシールの製造方法において、前記補強環２がオ
イルシール内周面から背面に至る断面略Ｌ字状を
呈し、該補強環２の成形型内周面７と嵌合する補
強環内周面１０が前記成形型内周面７に対しテー
パー角度を大きく形成されると共に、前記成形型
内周面７に形成された複数個の三角状の突起１１
に嵌合する溝１２が設けられ、オイルシール本体
１を形成するゴム状弾性部材と共に成形型内に装
着され一体成形することを特徴とするオイルシー
ルの製造方法。1 Oil seal body 1 made of a rubber-like elastic member
In the method for manufacturing an oil seal in which a reinforcing ring 2 made of a resin material is integrally molded, the reinforcing ring 2 has a substantially L-shaped cross section from the inner peripheral surface of the oil seal to the back surface, and the inner periphery of the mold for the reinforcing ring 2 is A reinforcing ring inner peripheral surface 10 that fits into the surface 7 is formed with a large taper angle with respect to the mold inner peripheral surface 7, and a plurality of triangular protrusions 11 formed on the mold inner peripheral surface 7.
1. A method for manufacturing an oil seal, characterized in that the oil seal is provided with a groove 12 that fits into the oil seal, and is mounted in a mold together with a rubber-like elastic member forming an oil seal body 1 and integrally molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081385A JPS59208271A (en) | 1983-05-10 | 1983-05-10 | Manufacturing method of oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081385A JPS59208271A (en) | 1983-05-10 | 1983-05-10 | Manufacturing method of oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59208271A JPS59208271A (en) | 1984-11-26 |
| JPS6246749B2 true JPS6246749B2 (en) | 1987-10-05 |
Family
ID=13744831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58081385A Granted JPS59208271A (en) | 1983-05-10 | 1983-05-10 | Manufacturing method of oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59208271A (en) |
-
1983
- 1983-05-10 JP JP58081385A patent/JPS59208271A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59208271A (en) | 1984-11-26 |
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