JPH0378045B2 - - Google Patents
Info
- Publication number
- JPH0378045B2 JPH0378045B2 JP23936090A JP23936090A JPH0378045B2 JP H0378045 B2 JPH0378045 B2 JP H0378045B2 JP 23936090 A JP23936090 A JP 23936090A JP 23936090 A JP23936090 A JP 23936090A JP H0378045 B2 JPH0378045 B2 JP H0378045B2
- Authority
- JP
- Japan
- Prior art keywords
- oil seal
- reinforcing ring
- diaphragm
- mold
- molding
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000012778 molding material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 19
- 230000006378 damage Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression 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、回転軸の芯振れを伴う機械装置の密
封手段として使用されるダイアフラム付オイルシ
ールを製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing an oil seal with a diaphragm used as a sealing means for a mechanical device with a rotating shaft that is subject to center runout.
（従来の技術）
例えば、洗濯機における回転軸のように、ハウ
ジングに対し芯振れを起しながら回転する軸の密
封手段として使用されるオイルシールは、第３図
に示すようなダイアフラム付オイルシールが有用
である。(Prior Art) For example, an oil seal used as a sealing means for a shaft that rotates with center runout relative to a housing, such as a rotating shaft in a washing machine, is an oil seal with a diaphragm as shown in Fig. 3. is useful.
同図のオイルシールは、回転軸の周面と摺動す
るシールリツプ２を備えたオイルシール部１およ
び可撓性膜部を備えて外周部を機械装置のハウジ
ングに装着されるダイアフラム部３の間に、略円
筒形状を呈して一端にフランジ６を付された補強
環５が、オイルシール部１およびダイアフラム部
３に接着されて介在しており、オイルシール部１
の内周側に、低摩擦性を備えた合成樹脂材料をも
つて製作され、回転軸に外挿されて回転軸に対す
るオイルシール部１の同芯性を保持させるブツシ
ユ９が挿入されている。 The oil seal shown in the figure has an oil seal part 1 with a seal lip 2 that slides on the circumferential surface of a rotating shaft, and a diaphragm part 3 with a flexible membrane part whose outer periphery is attached to the housing of a mechanical device. A reinforcing ring 5 having a substantially cylindrical shape and having a flange 6 attached to one end is interposed and bonded to the oil seal portion 1 and the diaphragm portion 3.
A bushing 9 is inserted into the inner peripheral side of the oil seal 1, which is made of a synthetic resin material with low friction and is fitted onto the rotating shaft to maintain the concentricity of the oil seal portion 1 with respect to the rotating shaft.
オイルシール部１の成形用材料は、耐摩耗性の
面から選定され、ダイアフラム部３の成形用材料
は、耐候性、耐屈曲性の面から選定され、通常、
両材料は組成を異にする。 The molding material for the oil seal portion 1 is selected from the viewpoint of wear resistance, and the molding material for the diaphragm portion 3 is selected from the viewpoints of weather resistance and bending resistance.
Both materials have different compositions.
上記したダイアフラム付オイルシールの成形
は、第４図に示す成形型を用いて同図および第５
図に示す要領でなされる。（特公昭52−48259号公
報参照）
すなわち、第４図に示すように、第２の成形型
１１と組合わされてダイアフラム付オイルシール
の形状に相当する成形キヤビテイを形成する第１
の成形型１０の中央部に設けられ、ダイアフラム
付オイルシールのシールリツプ２の背部および補
強環５の間に形成される環状空間に相当する形状
を備えた環状突起１２に、補強環５のフランジ６
側を外挿するとともに、オイルシール部成形用材
料片１４を環状突起１２の内側に、ダイアフラム
部成形用材料片１５をダイアフラム部成形面上
に、それぞれ、載置し、次いで、第１の成形型１
０および第２の成形型１１を加圧・加熱してオイ
ルシール部１およびダイアフラム部３を成形・加
硫するとともに、補強環５と接着させるものであ
る。 The above oil seal with diaphragm is molded using the mold shown in Figure 4 and Figure 5.
This is done as shown in the figure. (Refer to Japanese Patent Publication No. 52-48259.) That is, as shown in FIG.
The flange 6 of the reinforcing ring 5 is attached to the annular protrusion 12 which is provided in the center of the mold 10 and has a shape corresponding to the annular space formed between the back of the seal lip 2 of the oil seal with diaphragm and the reinforcing ring 5.
At the same time, the oil seal molding material piece 14 is placed inside the annular protrusion 12 and the diaphragm molding material piece 15 is placed on the diaphragm molding surface, and then the first molding Type 1
0 and the second mold 11 are pressurized and heated to mold and vulcanize the oil seal portion 1 and the diaphragm portion 3, and also to bond them to the reinforcing ring 5.
（発明が解決しようとする問題点）
上記した要領によるゴム部分１，３の成形・加
硫および補強環５との接着工程においては、第４
図の成形準備の状態から、第５図の最終加圧状態
へ移行する中途において、第６図に示す過程を経
由するが、同図の中間過程においては、補強環５
と第２の成形型１１のオイルシール部成形面とに
挾まれた成形キヤビテイ内に、オイルシール部成
形用材料が満たされ、次いで、同図の中間過程か
ら第５図の最終加圧状態へ移行する際に、余分の
材料が外方へ排出されるが、その一部が補強環５
のフランジ６および第１の成形型１０の底面１６
の間に進入して補強環５を第２の成形型１１側へ
押し上げ、反対側の端縁７を該端縁７と対向する
第２の成形型１１のキヤビテイ頂面１７に密接さ
せるために、オイルシール部成形用材料の余材
が、補強環５および環状突起１２の嵌合〓間を通
つて押し出され、実機への装着時において、密封
対象液に浸漬されるダイアフラム部の表面部分
（第３図上に符号Ａを付して示す。）へはみ出し、
Ａ部へのはみ出しに伴つて下記する不具合を惹起
する。(Problems to be Solved by the Invention) In the process of molding and vulcanizing the rubber parts 1 and 3 and adhering them to the reinforcing ring 5 in the manner described above, the fourth
In the middle of the transition from the molding preparation state shown in the figure to the final pressurized state shown in Fig. 5, the process shown in Fig. 6 is passed through.
The molding cavity sandwiched between the molding surface of the oil seal part of the second mold 11 is filled with the material for molding the oil seal part, and then from the intermediate stage shown in the same figure to the final pressurized state shown in FIG. During the transition, excess material is discharged outward, but some of it is transferred to the reinforcing ring 5.
flange 6 and bottom surface 16 of the first mold 10
In order to push up the reinforcing ring 5 toward the second mold 11 side and bring the opposite edge 7 into close contact with the cavity top surface 17 of the second mold 11 facing the edge 7. The remaining material for forming the oil seal part is pushed out through the fitting between the reinforcing ring 5 and the annular protrusion 12, and the surface part of the diaphragm part ( (shown with symbol A on Figure 3),
The protrusion into part A causes the following problems.
オイルシール部成形用材料とダイアフラム部
成形用材料との間に剥離を生じて破壊を招く。 Separation occurs between the oil seal part molding material and the diaphragm part molding material, leading to destruction.
両方の材料の接合部から侵入した水等が、補
強環５に錆を発生させ、この発錆により、
ａ ブツシユ９に対する保持力を低下させてブ
ツシユ９の脱落を招来する。 Water and the like that have entered through the joint between the two materials cause rust on the reinforcing ring 5, and this rusting reduces the holding force against the bush 9 and causes the bush 9 to fall off.
ｂ ブツシユ９およびシールリツプ２の同芯状
態の狂いを生じさせる。 b. This causes the bush 9 and seal lip 2 to become out of concentricity.
ｃ 補強環５およびゴム部分の接着を剥離させ
て破壊を招来する。 c) The adhesive between the reinforcing ring 5 and the rubber portion is peeled off, resulting in destruction.
等の問題を生じさせる。This causes problems such as:
本発明は、上記した従来の成形要領に伴う問題
点に鑑み、フランジ側の表面部分Ａにおけるオイ
ルシール成形用材料のはみ出しを抑止し得る成形
要領を提示するものである。 In view of the problems associated with the conventional molding procedures described above, the present invention proposes a molding procedure that can prevent the oil seal molding material from protruding from the surface portion A on the flange side.
（問題点を解決するための手段）
本発明は、上記した従来の技術によるにダイア
フラム付オイルシールの製造方法における問題点
を考慮して、第１の成形型の中央部に設けた環状
突起に補強環のフランジを外嵌させ、補強環の内
方にオイルシール部成形用材料片を載置するとと
もに、補強環の外方にダイアフラム部成形用材料
片を載置し、更に、補強環のフランジの反対側の
端縁に対向するキヤビテイ頂面に支持突起を配設
された第２の型を重ね、第１及び第２の成形型を
加熱・加圧してオイルシール部およびダイアフラ
ム部を加硫・成形するとともに、補強環に接着さ
せる構成となすものである。(Means for Solving the Problems) The present invention takes into consideration the problems in the method of manufacturing an oil seal with a diaphragm according to the above-mentioned conventional technology, and provides an annular projection provided at the center of the first mold. Fit the flange of the reinforcing ring outward, place a piece of material for molding the oil seal part inside the reinforcing ring, place a piece of material for molding the diaphragm part on the outside of the reinforcing ring, and then place a piece of material for molding the diaphragm part on the outside of the reinforcing ring. A second mold having a support protrusion is placed on the top surface of the cavity facing the opposite edge of the flange, and the first and second molds are heated and pressurized to press the oil seal portion and the diaphragm portion. It is constructed by sulfurizing and molding it and then adhering it to the reinforcing ring.
（作用）
上記した構成になる本発明のダイアフラム付オ
イルシールの製造方法においては、第２の成形型
のキヤビテイの頂面に配設された突起が、補強環
のフランジと反対側の端縁を支えてキヤビテイの
頂面および補強環の端縁の間に〓間を形成させ、
オイルシール部成形用材料の余材を補強環の外部
に流出させて実機装着状態で大気側に位置する補
強環の外周部に接着させる。(Function) In the method for manufacturing an oil seal with a diaphragm of the present invention having the above-described structure, the protrusion provided on the top surface of the cavity of the second forming mold touches the edge of the reinforcing ring opposite to the flange. support to form a gap between the top surface of the cavity and the edge of the reinforcing ring,
The remaining material for molding the oil seal portion is allowed to flow out of the reinforcing ring and is adhered to the outer periphery of the reinforcing ring located on the atmosphere side when installed on an actual machine.
（実施例）
第１図の実施例においては、第１の成形型１０
の中央部の環状突起１２に外挿された補強環５の
フランジ６に対し反対側の端縁７に対向する第２
の成形型１１の成形キヤビ長期間にわたつて正常
な機能を持続することができる。(Example) In the example shown in FIG.
A second edge 7 opposite to the flange 6 of the reinforcing ring 5 is inserted into the annular protrusion 12 at the center of the reinforcing ring 5.
The molding cavity of the molding die 11 can maintain its normal function over a long period of time.
第１図は、本発明に使用する成形型の断面図、
第２図は、第１図上に矢印−を付して示した
位置における部分矢視図、第３図は、本発明の製
作対象とにる製品の断面図、第４図、第５図およ
び第６図は、それぞれ、従来の製造方法の成形準
備過程、最終過程および中間過程における状況を
示す断面図である。
１……オイルシール部、２……シールリツプ、
３……ダイアフラム部、５……補強環、６……フ
ランジ、７……端縁、９……ブツシユ、１０……
第１の成形型、１１……第２の成形型、１２……
環状突起、１４……オイルシール部成形用材料
片、１５……ダイアフラム部成形用材料片、１６
……キヤビテイ底面、１７……キヤビテイ頂面、
２０……支持突起。
FIG. 1 is a sectional view of a mold used in the present invention,
FIG. 2 is a partial view taken in the direction indicated by the arrow in FIG. and FIG. 6 are cross-sectional views showing the conditions in the molding preparation process, final process, and intermediate process, respectively, of the conventional manufacturing method. 1...Oil seal part, 2...Seal lip,
3...Diaphragm part, 5...Reinforcement ring, 6...Flange, 7...Edge, 9...Button, 10...
First mold, 11...Second mold, 12...
Annular projection, 14... Piece of material for molding oil seal part, 15... Piece of material for molding diaphragm part, 16
...Cavity bottom surface, 17...Cavity top surface,
20...Support protrusion.
Claims (1)
備えたオイルシール部１および可撓性膜部を有し
て外周部を固定されるダイアフラム部３の中間
に、略円筒形状を呈してフランジ６を付された補
強環５を埋設されてなるダイアフラム付オイルシ
ールの製造方法において、第１の成形型１０の中
央部に設けた環状突起１２に前記補強環５のフラ
ンジ６を外嵌させ、前記補強環５の内方にオイル
シール部成形用材料片１４を載置するとともに、
前記補強環５の外方にダイアフラム部成形用材料
片１５を載置し、前記補強環５の前記フランジ６
の反対側の端縁７に対向するキヤビテイ頂面１７
に支持突起２０を配設した第２の成形型１１を重
ね、前記第１および第２の成形型１０，１１を加
熱・加圧して前記オイルシール部１およびダイア
フラム部３を加硫・成形するとともに、前記補強
環５に接着させるダイアフラム付オイルシールの
製造方法。1. A flange 6 having a substantially cylindrical shape is provided between an oil seal portion 1 having a seal lip 2 that slides on the circumferential surface of the shaft and a diaphragm portion 3 having a flexible membrane portion and having an outer circumferential portion fixed. In the method for manufacturing an oil seal with a diaphragm in which a reinforcing ring 5 attached thereto is embedded, the flange 6 of the reinforcing ring 5 is fitted onto the annular protrusion 12 provided at the center of the first mold 10, and the reinforcing ring 5 is A piece of material 14 for forming the oil seal portion is placed inside the ring 5, and
A piece of diaphragm molding material 15 is placed on the outside of the reinforcing ring 5, and the flange 6 of the reinforcing ring 5 is
Cavity top surface 17 facing opposite edge 7 of
A second mold 11 provided with a support protrusion 20 is stacked on top of the second mold 11, and the first and second molds 10, 11 are heated and pressurized to vulcanize and mold the oil seal portion 1 and diaphragm portion 3. Also, a method for manufacturing an oil seal with a diaphragm to be adhered to the reinforcing ring 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23936090A JPH03205116A (en) | 1990-09-10 | 1990-09-10 | Production of oil seal fitted with diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23936090A JPH03205116A (en) | 1990-09-10 | 1990-09-10 | Production of oil seal fitted with diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03205116A JPH03205116A (en) | 1991-09-06 |
| JPH0378045B2 true JPH0378045B2 (en) | 1991-12-12 |
Family
ID=17043603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23936090A Granted JPH03205116A (en) | 1990-09-10 | 1990-09-10 | Production of oil seal fitted with diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03205116A (en) |
-
1990
- 1990-09-10 JP JP23936090A patent/JPH03205116A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03205116A (en) | 1991-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19920609 |
|
| EXPY | Cancellation because of completion of term |