JPH11294595A - Resin seal ring - Google Patents
Resin seal ringInfo
- Publication number
- JPH11294595A JPH11294595A JP10095802A JP9580298A JPH11294595A JP H11294595 A JPH11294595 A JP H11294595A JP 10095802 A JP10095802 A JP 10095802A JP 9580298 A JP9580298 A JP 9580298A JP H11294595 A JPH11294595 A JP H11294595A
- Authority
- JP
- Japan
- Prior art keywords
- outer diameter
- seal ring
- resin
- surface side
- ring
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 55
- 239000011347 resin Substances 0.000 title claims abstract description 55
- 239000011342 resin composition Substances 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229920006015 heat resistant resin Polymers 0.000 description 3
- 229920001643 poly(ether ketone) Polymers 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 150000008378 aryl ethers Chemical class 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920006259 thermoplastic polyimide Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は樹脂製シールリング
に関し、特に合い口部の隙間を保持しオイルリークを安
定させた合成樹脂製シールリングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin seal ring, and more particularly, to a synthetic resin seal ring in which a gap at an abutment portion is maintained and oil leak is stabilized.
【０００２】[0002]
【従来の技術】一般にトルクコンバータや油圧式クラッ
チなどの自動車等の自動変速機には作動油を密封するた
めのオイルシールリングが要所に取り付けられている。
このようなオイルシールリングは充分なオイルシール性
が要求される。オイルシールリングは、鋳鉄製シールリ
ングやフッ素樹脂シールリングが従来用いられたが、耐
摩耗性、オイルシール性の向上およびコスト低減のた
め、射出成形法により相互に対向する合い口を有する合
成樹脂製シールリング、例えばＰＥＥＫ樹脂製シールリ
ングが多用されるようになっている。シールリングの合
い口は、ストレートカット形状、ステップ形状、複合ス
テップ形状等あるが、オイルリークを少なくできる合い
口として複合ステップ形状が知られている（例えば、特
開平８−７５００７号公報）。2. Description of the Related Art In general, an automatic transmission such as a motor vehicle such as a torque converter or a hydraulic clutch is provided with an oil seal ring at an important point for sealing hydraulic oil.
Such an oil seal ring is required to have a sufficient oil seal property. For the oil seal ring, a cast iron seal ring or a fluororesin seal ring was conventionally used, but in order to improve abrasion resistance, oil sealability and cost reduction, a synthetic resin with a mating face facing each other by injection molding method Seal rings made of, for example, PEEK resin seal rings are frequently used. The abutment of the seal ring has a straight cut shape, a step shape, a compound step shape and the like, and a compound step shape is known as a contact capable of reducing oil leak (for example, JP-A-8-75007).
【０００３】従来の複合ステップ形状の合い口を有する
樹脂製シールリングについて図６により説明する。図６
は合い口部を広げた状態（ａ）および嵌合した状態
（ｂ）を示す斜視図である。合い口部は、樹脂製シール
リング１の矩形断面における側面二辺を結んでリング内
径面側１ａとリング外径面側１ｂとに二分割するとき、
リング内径面側１ａの矩形断面の先端部分に突き合わせ
面２が形成される。また、リング外径面側の矩形断面部
分１ｂには、この部分をさらに径方向に二分割する一方
の矩形断面部分に前記突き合わせ面から突出した外径面
側突起３と、他方の矩形断面部分を削除して突き合わせ
面２から後退した外径面側段部４とが形成される。な
お、外径面側突起３および外径面側段部４の周面は樹脂
製シールリング１の所定の曲率をもつように形成され
る。合い口の嵌合時（図６（ｂ））には、突き合わせ面
２と２´とが嵌合し、外径面側突起３と外径面側段部４
´、外径面側段部４と外径面側突起３´とが相補的に一
定の間隙をおいて嵌合し、樹脂製シールリング１はほぼ
真円形となる。[0003] A conventional resin seal ring having a joint with a multi-step shape will be described with reference to FIG. FIG.
FIG. 3 is a perspective view showing a state in which the abutment portion is expanded (a) and a state in which the abutment portion is fitted (b). When the abutment portion connects the two sides of the rectangular cross-section of the resin seal ring 1 and divides into two into a ring inner diameter side 1a and a ring outer diameter side 1b,
An abutment surface 2 is formed at the distal end of the rectangular cross section on the ring inner surface 1a. In addition, a rectangular cross-section 1b on the ring outer-diameter surface side has an outer-diameter surface-side projection 3 protruding from the abutting surface into one rectangular cross-section that further divides this portion into two in the radial direction, and the other rectangular cross-section. And an outer diameter surface side stepped portion 4 which is retracted from the butting surface 2 is formed. The outer peripheral surface side protrusion 3 and the outer peripheral surface side step 4 are formed so as to have a predetermined curvature of the resin seal ring 1. When the abutment is fitted (FIG. 6 (b)), the butting surfaces 2 and 2 'are fitted, and the outer diameter side projection 3 and the outer diameter side step 4 are fitted.
′, The outer diameter side step 4 and the outer diameter side projection 3 ′ are fitted complementarily with a certain gap therebetween, and the resin seal ring 1 becomes substantially circular.
【０００４】樹脂製シールリング１を射出成形により製
造する際の金型を図７に示す。図７は、図６に示す樹脂
製シールリング１の突き合わせ面２における金型断面で
ある。可動側型板９と固定側型板１０とが衝合面１２で
衝合されキャビティ１１が形成される。図７におけるキ
ャビティ１１は外径面側突起３が形成される部分であ
る。なお、外枠の破線はシールリング１の矩形断面を示
す。このように、樹脂製シールリングの金型は複雑な断
面形状を有する複合ステップ形状の合い口を形成するた
め、固定側型板１０にも凸部１３を設ける複雑な金型構
造となっている。FIG. 7 shows a mold for manufacturing the resin seal ring 1 by injection molding. FIG. 7 is a mold cross section of the butting surface 2 of the resin seal ring 1 shown in FIG. The movable mold plate 9 and the fixed mold plate 10 abut on the abutment surface 12 to form the cavity 11. The cavity 11 in FIG. 7 is a portion where the outer diameter surface side projection 3 is formed. The broken line of the outer frame indicates a rectangular cross section of the seal ring 1. As described above, the mold of the resin seal ring has a complex mold structure in which the fixed side mold plate 10 is also provided with the convex portion 13 in order to form a joint having a complex step shape having a complicated cross-sectional shape. .
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述の
金型を用いて射出成形により樹脂製シールリングの製造
を行なうと次のような問題が生じる。すなわち、金型は
可動側型板９と固定側型板１０とに二分割されており、
成形時は衝合させた状態で成形され、製品を取り出す時
は型板を分割して取り出す。この繰り返しにより金型が
干渉し摩耗したり、かじったりする。特に外径面側突起
３を形成するために設けられている固定側型板１０の凸
状部１３の部分が可動側型板９の角部１４と干渉を起こ
しやすく、この部分がかじり・摩耗する。その結果、樹
脂製シールリングの合い口部の隙間が大きくなり、シー
ル性能が低下するという問題がある。また、その都度金
型を修理しなければならないため、作業効率が低下し、
あるいは生産コストが上昇するという問題がある。However, when a resin-made seal ring is manufactured by injection molding using the above-mentioned mold, the following problems occur. That is, the mold is divided into a movable mold plate 9 and a fixed mold plate 10,
At the time of molding, it is molded in a state of abutment, and when taking out the product, the template is divided and taken out. Due to the repetition, the mold interferes and wears or bites. In particular, the portion of the convex portion 13 of the fixed-side mold plate 10 provided for forming the outer-diameter surface-side projection 3 easily interferes with the corner portion 14 of the movable-side mold plate 9, and this portion is eroded and worn. I do. As a result, there is a problem that the gap at the abutment portion of the resin seal ring becomes large, and the sealing performance is reduced. In addition, since the mold must be repaired each time, work efficiency decreases,
Alternatively, there is a problem that the production cost increases.
【０００６】本発明は、このような問題に対処するため
になされたもので、合い口部の隙間精度に優れ、生産性
を向上させることのできる形状を有する樹脂製シールリ
ングを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to address such a problem, and it is an object of the present invention to provide a resin seal ring having a shape which is excellent in gap accuracy of an abutment portion and can improve productivity. Aim.
【０００７】[0007]
【課題を解決するための手段】本発明の樹脂製シールリ
ングは、相互に対向する合い口を有する矩形断面の樹脂
製シールリングであって、一方の合い口は、上記矩形断
面における上記樹脂製シールリング側面二辺を結んでリ
ング内径面側とリング外径面側とに二分割するとき、上
記リング内径面側の矩形断面部分に形成される突き合わ
せ面と、上記リング外径面側の矩形断面部分を径方向に
二分割する一方の矩形断面部分に上記突き合わせ面から
突出した外径面側突起と、他方の矩形断面部分を削除し
て上記突き合わせ面から後退した外径面側段部とを有
し、他方の合い口は、上記突き合わせ面、上記外径面側
突起および上記外径面側段部と相補的に嵌合するように
形成された突き合わせ面、外径面側突起および外径面側
段部とを有し、上記一方の合い口および他方の合い口の
少なくとも一つの合い口は、上記外径面側段部の外周面
がシールリング側面に向かって内径向き勾配を有してい
ることを特徴とする。The resin seal ring of the present invention is a resin seal ring having a rectangular cross section having mating portions facing each other, and one mating portion is formed of the resin seal ring in the rectangular cross section. When the two sides of the seal ring side face are connected to each other to be divided into a ring inner diameter surface side and a ring outer diameter surface side, an abutting surface formed on the rectangular cross section on the ring inner diameter surface side and a rectangle on the ring outer diameter surface side An outer-diameter surface-side projection protruding from the abutting surface to one rectangular cross-sectional portion that divides the cross-sectional portion into two in the radial direction; and an outer-diameter surface-side stepped portion retreated from the abutting surface by removing the other rectangular cross-sectional portion. The other abutment has a butting surface, an outer diameter surface projection and an outer surface formed so as to complementarily fit with the abutting surface, the outer diameter surface side projection and the outer diameter surface side step portion. Having a step on the radial surface side, At least one of the abutment of the square of the abutment and the other abutment is characterized in that the outer peripheral surface of the outer diameter surface side step has a radial inward facing slope toward the seal ring side.
【０００８】また、上記外径面側段部と相補的に嵌合す
る外径面側突起が上記内径向き勾配と相補的に嵌合する
勾配を有していることを特徴とする。[0008] Further, the outer diameter surface side projection complementary to the outer diameter surface side step has a gradient complementary to the inner diameter direction gradient.
【０００９】上記内径向き勾配がリング内径面側とリン
グ外径面側との二分割線より 2〜30°の角度を有する勾
配であることを特徴とする。[0009] It is characterized in that the gradient toward the inner diameter is a gradient having an angle of 2 to 30 ° with respect to the dividing line between the inner surface of the ring and the outer surface of the ring.
【００１０】樹脂製シールリングを形成する樹脂は射出
成形できる樹脂組成物であり、また、その射出成形は、
相互に対向する合い口を重なり部分のない広げた形態で
成形する金型を用いることを特徴とする。[0010] The resin forming the resin seal ring is a resin composition that can be injection-molded.
The present invention is characterized in that a mold is used in which the mutually facing abutments are molded in an expanded form without overlapping portions.
【００１１】本発明の樹脂製シールリングは合い口部を
上述の構造としたので、射出成形金型における固定側型
板と可動側型板とでかじり・摩耗する現象を大幅に抑え
ることができる。このため、安定して樹脂製シールリン
グを製造することができる。また、外径面側段部の内径
向き勾配を 2〜30°の角度を有する勾配とすることによ
り、オイルリークを効果的に抑えることができる。Since the resin seal ring of the present invention has the above-described structure at the abutment portion, the phenomenon of galling and abrasion between the fixed mold plate and the movable mold plate in the injection molding die can be greatly suppressed. . Therefore, a resin seal ring can be stably manufactured. In addition, by setting the gradient of the step on the outer diameter surface side toward the inner diameter to be a gradient having an angle of 2 to 30 °, oil leak can be effectively suppressed.
【００１２】[0012]
【発明の実施の形態】本発明に係る樹脂製シールリング
の合い口部の構造を図１により説明する。図１は所定の
曲率半径を有する合い口部を示す拡大図であり、図１
（ａ）は正面図を、図１（ｂ）はＡ−Ａ拡大断面図をそ
れぞれ示す。本発明の樹脂製シールリング１は、図６に
示す複合ステップ形状の合い口部において、外径面側段
部４に特徴を有している。すなわち、外径面側段部４の
外周面４ａがシールリング側面１ｄに向かって内径向き
勾配を有している。具体的には、樹脂製シールリングの
拡大断面図１（ｂ）において外径側と内径側とに破線１
ｅで二分割するとき、内径向き勾配の角度θが破線１ｅ
より 2〜30°、好ましくは 2〜15°の角度を有する勾配
であることを特徴とする。角度θが 2°未満では金型の
かじり現象が生じる場合があり、30°を越えるとシール
リングを使用時に幅方向にずれた場合、オイルリークが
著しく増大する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a joint portion of a resin seal ring according to the present invention will be described with reference to FIG. FIG. 1 is an enlarged view showing an abutment having a predetermined radius of curvature.
1A is a front view, and FIG. 1B is an AA enlarged cross-sectional view. The resin seal ring 1 of the present invention is characterized by an outer diameter surface side step portion 4 at an abutment portion of a composite step shape shown in FIG. That is, the outer peripheral surface 4a of the outer diameter surface side step portion 4 has a gradient toward the inner diameter toward the seal ring side surface 1d. Specifically, in the enlarged cross-sectional view of the resin seal ring, a broken line 1 is shown on the outer diameter side and the inner diameter side.
e, the angle θ of the gradient toward the inner diameter is represented by a broken line 1e.
It is characterized by a gradient having an angle of 2 to 30 °, preferably 2 to 15 °. If the angle θ is less than 2 °, the galling phenomenon of the mold may occur. If the angle θ exceeds 30 °, if the seal ring is displaced in the width direction during use, the oil leak increases significantly.
【００１３】合い口が相互に嵌合した状態を図２に示
す。図２は、外径面側段部４と外径面側突起３´とが嵌
合する状態を示す断面図である。本発明においては、外
径面側段部４が上述の内径向き勾配を有していればよい
が、さらにこの外径面側段部４と嵌合する外径面側突起
３´が、外径面側段部４と相補的に嵌合する内径向き勾
配を有していることが好ましい。すなわち、 2〜30°の
内径向き勾配であって、外径面側段部４の内径向き勾配
角度と略同一の勾配角度を有することが好ましい。外径
面側突起３´と外径面側段部４との勾配角度を略同一と
することにより、固定型板および可動型板同士のかじり
や摩耗が少なくなるとともに、またシールリングが幅方
向にずれた場合であってもオイルリークが少なくなる。FIG. 2 shows a state in which the abutments are fitted to each other. FIG. 2 is a cross-sectional view showing a state where the outer diameter side step portion 4 and the outer diameter side projection 3 ′ are fitted. In the present invention, it is sufficient that the outer diameter side step 4 has the above-described gradient toward the inner diameter, and the outer diameter side projection 3 ′ that fits with the outer diameter side step 4 further includes an outer diameter side projection 3 ′. It is preferable to have an inner diameter direction gradient that complementarily fits with the radial surface side step portion 4. That is, it is preferable to have a gradient angle of 2 to 30 ° toward the inner diameter, which is substantially the same as the gradient angle toward the inner diameter of the outer diameter surface side step portion 4. By making the inclination angle between the outer diameter surface side projection 3 'and the outer diameter surface side step portion 4 substantially the same, galling and abrasion between the fixed mold plate and the movable mold plate are reduced, and the seal ring is moved in the width direction. The oil leak is reduced even if it is shifted.
【００１４】比較例として、外径面側突起３´と外径面
側段部４との組合わせについて図３により説明する。図
３（ａ）は外径面側突起３´と外径面側段部４とが共に
勾配を有しない場合、図３（ｂ）は外径面側突起３´と
外径面側段部４との勾配角度の差が30°を越えた場合を
示す図である。図３（ａ）に示す合い口形状のシールリ
ングの場合、射出成形時における固定型板および可動型
板同士のかじりや摩耗が発生する。その結果、図３
（ａ）に示す合い口形状が製造ロット内でバラツキを生
じやすくなり、また、オイルリークが生じやすくなる。
図３（ｂ）に示す合い口形状のシールリングの場合、固
定型板および可動型板同士のかじりや摩耗は少ないが、
合い口部に隙間が生じ、オイルリークが生じやすくな
る。As a comparative example, a combination of the outer diameter surface side projection 3 'and the outer diameter surface side step portion 4 will be described with reference to FIG. FIG. 3A shows the case where both the outer diameter side projection 3 ′ and the outer diameter side step 4 have no gradient, and FIG. 3B shows the outer diameter side projection 3 ′ and the outer diameter side step. It is a figure showing a case where the difference of the gradient angle with 4 exceeds 30 degrees. In the case of the seal ring having an abutment shape shown in FIG. 3A, galling and abrasion occur between the fixed mold plate and the movable mold plate during injection molding. As a result, FIG.
The abutment shape shown in (a) tends to vary within a production lot, and oil leakage tends to occur.
In the case of the seal ring having an abutment shape shown in FIG. 3 (b), there is little galling or wear between the fixed mold plate and the movable mold plate.
A gap is formed at the abutment, and oil leaks are likely to occur.
【００１５】本発明の樹脂製シールリング１は、合い口
部を重なり部分のない広げた形態で成形できる金型を用
いて、樹脂組成物を射出成形して得られる。シールリン
グの金型を図４により説明する。図４（ａ）は型開き時
に可動型板を表側方向からみた合い口部の金型平面図
を、図４（ｂ）は型開き時に固定型板を裏側方向からみ
た合い口部の金型平面図をそれぞれ示す。また、この金
型で得られる樹脂製シールリング１の各部の断面図を図
５に示す。図４（ａ）に示すように、可動型板には金型
衝合時にキャビティとなる部分が凹凸をもって形成され
ている。凹部５および５´は同一深さを有する凹部で樹
脂製シールリング１の幅方向の厚さを規定する。凹部５
の内径側には所定の勾配が設けられている。キャビティ
底面からの凸部６は金型衝合面と凹部５との約中間の高
さを有する凸部であり、７は金型衝合面である。一方、
固定型板には、図４（ｂ）に示すように、凸部６とほぼ
同一の高さを有する突出した凸部８が金型衝合面に形成
されている。この凸部８にも凹部５の内径側勾配と相補
的に嵌合する勾配が設けられている。このように凸部８
および凹部５の勾配は、外径面側突起３および外径面側
段部４を形成する領域全体にわたって設けることが好ま
しい。また、金型のかじりが生じる外径面側突起３の部
分のみに勾配を設けることができる。この固定型板およ
び可動型板を衝合してキャビティを形成し、樹脂組成物
を射出成形することにより各切断面部における図５に示
す断面形状を有する樹脂製シールリングが得られる。な
お、各切断面箇所を図４に示す。また、シールリング使
用時においては、断面（ａ）と断面（ｃ）とが、断面
（ｂ）と断面（ｄ）とが相互に嵌合する。The resin-made seal ring 1 of the present invention is obtained by injection-molding a resin composition using a mold that can be formed in a form in which the abutment portion is widened without overlapping portions. The mold for the seal ring will be described with reference to FIG. FIG. 4A is a plan view of a mold at the abutment portion when the movable mold plate is viewed from the front side when the mold is opened, and FIG. 4B is a mold at the abutment portion when the fixed mold plate is viewed from the back side when the mold is opened. The plan views are respectively shown. FIG. 5 is a cross-sectional view of each part of the resin seal ring 1 obtained by this mold. As shown in FIG. 4A, the movable mold plate is provided with a concave / convex portion serving as a cavity at the time of abutting the mold. The recesses 5 and 5 ′ are recesses having the same depth and define the thickness of the resin seal ring 1 in the width direction. Recess 5
A predetermined gradient is provided on the inner diameter side of. The convex portion 6 from the cavity bottom surface is a convex portion having a height approximately intermediate between the mold contact surface and the concave portion 5, and 7 is a mold contact surface. on the other hand,
As shown in FIG. 4 (b), on the fixed mold plate, a protruding convex portion 8 having substantially the same height as the convex portion 6 is formed on the die abutment surface. The convex portion 8 is also provided with a gradient that complementarily fits the gradient on the inner diameter side of the concave portion 5. Thus, the projection 8
The inclination of the concave portion 5 is preferably provided over the entire area where the outer diameter surface side projection 3 and the outer diameter surface side step portion 4 are formed. Also, a gradient can be provided only in the portion of the outer diameter surface side projection 3 where the mold is galling. The fixed mold plate and the movable mold plate are abutted to form a cavity, and a resin composition is injection-molded to obtain a resin seal ring having a cross-sectional shape shown in FIG. 5 at each cut surface. In addition, each cut surface location is shown in FIG. Further, when the seal ring is used, the cross section (a) and the cross section (c) are fitted to each other, and the cross section (b) and the cross section (d) are fitted to each other.
【００１６】樹脂製シールリングは、図４に示す金型を
用いて樹脂組成物を射出成形した後、樹脂製またはゴム
製の円柱体およびリングゲージとからなる治具を用い
て、そのリングゲージ内に挿入固定して樹脂組成物のベ
ース樹脂のガラス転移点以上の温度になるよう加熱して
熱固定を行うことにより、前述のごとき複合ステップカ
ット型のシールリングを得ることができる。The resin seal ring is formed by injection molding a resin composition using a mold shown in FIG. 4 and then using a jig composed of a resin or rubber cylindrical body and a ring gauge. The composite step-cut type seal ring as described above can be obtained by performing heat fixing by inserting the resin into the inside and heating it to a temperature equal to or higher than the glass transition point of the base resin of the resin composition.
【００１７】本発明に係る樹脂組成物としては、耐熱性
樹脂、強化繊維、フッ素系樹脂を少なくとも配合してな
る。耐熱性樹脂は、少なくとも 280℃以上の融点を有す
る熱可塑性樹脂であればよい。例えば、ポリシアノアリ
ールエーテル系樹脂、ポリエーテルエーテルケトン樹脂
等の芳香族ポリエーテルケトン系樹脂、芳香族系熱可塑
性ポリイミド樹脂、ポリアミド４６系樹脂、ポリフェニ
レンスルフィド系樹脂等を挙げることができる。これら
は、高い耐熱性に加え、難燃性、機械的性質、電気的性
質および耐薬品性に優れている。本発明に係る好適な樹
脂組成物としては、芳香族ポリエーテルケトン系樹脂ま
たはポリフェニレンスルフィド系樹脂からなる耐熱性樹
脂に、繊維状強化材、ポリテトラフルオロエチレンなど
のフッ素系樹脂を配合してなるものが、複合ステップカ
ット型シールリングの複雑な形状を容易に成形でき、樹
脂製シールリングに要求される特性を得やすいので好ま
しい。The resin composition according to the present invention comprises at least a heat-resistant resin, a reinforcing fiber, and a fluororesin. The heat-resistant resin may be a thermoplastic resin having a melting point of at least 280 ° C. For example, aromatic polyether ketone resins such as polycyano aryl ether resins and polyether ether ketone resins, aromatic thermoplastic polyimide resins, polyamide 46 resins, polyphenylene sulfide resins and the like can be mentioned. These are excellent in flame retardancy, mechanical properties, electrical properties and chemical resistance in addition to high heat resistance. As a preferred resin composition according to the present invention, a heat-resistant resin composed of an aromatic polyetherketone-based resin or polyphenylene sulfide-based resin, a fibrous reinforcing material, and a fluorine-based resin such as polytetrafluoroethylene are compounded. This is preferable because the complex shape of the composite step-cut type seal ring can be easily formed, and the characteristics required for the resin seal ring can be easily obtained.
【００１８】[0018]
【実施例】図４に示す金型を用いて、リング幅 2.0mm、
リング厚さ 1.8mm、リング外径 50 mmφの複合ステップ
カット型シールリングを射出成形し、その後、ゴム製の
円柱体およびリングゲージとからなる治具を用いて、合
い口部が嵌合するように強制変形させ、その治具のまま
電気炉にいれて 200℃で 2時間の熱固定を行ない樹脂製
シールリングを得た。樹脂組成物は芳香族ポリエーテル
ケトン系樹脂、炭素繊維、ポリテトラフルオロエチレン
樹脂を配合した。樹脂製シールリングの製造を 200,000
ショット以上連続生産しても樹脂製シールリング合い口
断面形状に変化は見られなかった。一方、比較例として
示した図３（ａ）の合い口断面形状を有する樹脂製シー
ルリングの場合、 5,000ショットの生産で金型のかじり
・摩耗現象が発生し、金型の修理を必要とした。EXAMPLE Using a mold shown in FIG.
Injection molding of a compound step-cut type seal ring with a ring thickness of 1.8 mm and a ring outer diameter of 50 mmφ is performed, and then a jig consisting of a rubber cylinder and a ring gauge is used so that the abutment is fitted. The jig was placed in an electric furnace and heat-fixed at 200 ° C. for 2 hours to obtain a resin seal ring. The resin composition contained an aromatic polyetherketone resin, carbon fiber, and polytetrafluoroethylene resin. 200,000 resin seal rings manufactured
Even after continuous production of shots or more, no change was found in the cross-sectional shape of the resin seal ring opening. On the other hand, in the case of a resin seal ring having the cross-sectional shape of the abutment shown in FIG. 3A as a comparative example, the mold was required to be repaired because galling and abrasion occurred in the production of 5,000 shots. .
【００１９】[0019]
【発明の効果】本発明の樹脂製シールリングは、合い口
部における外径面側段部の外周面がシールリング側面に
向かって内径向き勾配を有しているので、合い口の隙間
精度に優れる。また、金型のかじり・摩耗現象がなく、
金型寿命が向上する。According to the resin seal ring of the present invention, since the outer peripheral surface of the outer diameter side step portion at the abutment portion has a gradient toward the inner diameter toward the side surface of the seal ring, the clearance accuracy of the abutment is improved. Excellent. In addition, there is no mold galling or wear phenomenon,
Mold life is improved.
【００２０】また、相補的に嵌合する外径面側突起が上
記内径向き勾配と相補的に嵌合する勾配を有しているの
で、合い口の優れた隙間精度とともに、金型のかじり・
摩耗現象がなく、生産性が向上する。Further, since the outer-diameter surface-side projection which complementarily fits has a gradient which complementarily fits the above-mentioned inner-diameter direction gradient, not only excellent clearance accuracy at the abutment but also galling of the mold is achieved.
There is no wear phenomenon, and productivity is improved.
【００２１】また、内径向き勾配が 2〜30°の角度を有
するので、合い口のより優れた隙間精度とともに、金型
のかじり・摩耗現象がなく、生産性がより向上する。Further, since the inner diameter direction gradient has an angle of 2 to 30 °, the gap is more excellent at the abutment, and there is no galling or wear phenomenon of the mold, and the productivity is further improved.
【００２２】射出成形できる樹脂組成物を用いて、相互
に対向する合い口を重なり部分のない広げた形態で成形
する金型を用いるので、複雑な複合ステップ形状の合い
口を有する樹脂製シールリングを容易に得ることができ
る。A resin seal ring having a complex compound step-shaped joint is used because a mold is used in which a resin composition that can be injection-molded is used to mold the joints facing each other in an expanded form without overlapping portions. Can be easily obtained.
【図１】合い口部の構造を示す図である。FIG. 1 is a diagram showing a structure of an abutment portion.
【図２】合い口が相互にが嵌合した状態を示す図であ
る。FIG. 2 is a diagram showing a state in which the abutments are fitted to each other.
【図３】比較例における合い口が相互に嵌合した状態を
示す図である。FIG. 3 is a diagram showing a state in which the abutments in the comparative example are fitted to each other.
【図４】シールリングの金型を説明する図である。FIG. 4 is a diagram illustrating a mold for a seal ring.
【図５】シールリングの断面形状を示す図である。FIG. 5 is a diagram showing a cross-sectional shape of a seal ring.
【図６】従来のシールリングを示す斜視図である。FIG. 6 is a perspective view showing a conventional seal ring.
【図７】従来のシールリングの金型を説明する図であ
る。FIG. 7 is a view for explaining a conventional seal ring mold.
１ 樹脂製シールリング ２ 突き合わせ面 ３ 外径面側突起 ４ 外径面側段部 ５ 凹部 ６ 凸部 ７ 金型衝合面 ８ 固定型板の凸部 ９ 可動側型板 １０ 固定側型板 １１ キャビティ １２ 衝合面 １３ 凸状部 １４ 角部 DESCRIPTION OF SYMBOLS 1 Resin seal ring 2 Butting surface 3 Outer diameter side projection 4 Outer diameter side step 5 Depression 6 Convex part 7 Mold abutment surface 8 Convex part of fixed mold plate 9 Movable mold plate 10 Fixed mold plate 11 Cavity 12 Abutment surface 13 Convex part 14 Corner
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 31:26 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI B29L 31:26
Claims (5)
の樹脂製シールリングであって、 一方の合い口は、前記矩形断面における前記樹脂製シー
ルリング側面二辺を結んでリング内径面側とリング外径
面側とに二分割するとき、前記リング内径面側の矩形断
面部分に形成される突き合わせ面と、前記リング外径面
側の矩形断面部分を径方向に二分割する一方の矩形断面
部分に前記突き合わせ面から突出した外径面側突起と、
他方の矩形断面部分を削除して前記突き合わせ面から後
退した外径面側段部とを有し、 他方の合い口は、前記突き合わせ面、前記外径面側突起
および前記外径面側段部と相補的に嵌合するように形成
された突き合わせ面、外径面側突起および外径面側段部
とを有し、 前記一方の合い口および前記他方の合い口の少なくとも
一つの合い口は、前記外径面側段部の外周面がシールリ
ング側面に向かって内径向き勾配を有していることを特
徴とする樹脂製シールリング。1. A resin seal ring having a rectangular cross section having mutually facing mating portions, wherein one of the mating portions connects two side surfaces of the resin seal ring in the rectangular cross section with a ring inner diameter surface side. When divided into two parts on the ring outer diameter surface side, a butting surface formed on the rectangular cross section part on the ring inner diameter surface side, and one rectangular cross section dividing the rectangular cross section part on the ring outer diameter surface side in the radial direction An outer diameter surface side projection protruding from the butting surface to a portion,
An outer diameter surface side stepped portion which is removed from the abutting surface by removing the other rectangular cross-sectional portion, and the other abutment is the abutting surface, the outer diameter surface side projection, and the outer diameter surface side stepped portion Abutment surface formed so as to complementarily fit with, an outer diameter surface side projection and an outer diameter surface side stepped portion, at least one of the one abutment and the other abutment is A resin seal ring, wherein the outer peripheral surface of the outer diameter side step portion has an inner diameter gradient toward the seal ring side surface.
径面側突起が前記内径向き勾配と相補的に嵌合する勾配
を有していることを特徴とする請求項１記載の樹脂製シ
ールリング。2. An outer diameter side projection complementary to the outer diameter side step portion has a gradient complementary to the inner diameter direction gradient. The resin seal ring as described.
とリング外径面側との二分割線より 2〜30°の角度を有
する勾配であることを特徴とする請求項１または請求項
２記載の樹脂製シールリング。3. The inner diameter direction gradient is a gradient having an angle of 2 to 30 ° with respect to a bisecting line between the ring inner diameter surface side and the ring outer diameter surface side. The resin seal ring as described.
あることを特徴とする請求項１ないし請求項３のいずれ
か１項記載の樹脂製シールリング。4. The resin-made seal ring according to claim 1, wherein the resin is a resin composition that can be injection-molded.
い口を重なり部分のない広げた形態で成形する金型を用
いることを特徴とする請求項４記載の樹脂製シールリン
グ。5. The resin-made seal ring according to claim 4, wherein the injection molding uses a mold for molding the mutually facing abutments in an expanded form without overlapping portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09580298A JP4206145B2 (en) | 1998-04-08 | 1998-04-08 | Resin seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09580298A JP4206145B2 (en) | 1998-04-08 | 1998-04-08 | Resin seal ring |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007118036A Division JP4478167B2 (en) | 2007-04-27 | 2007-04-27 | Resin seal ring and manufacturing method thereof |
| JP2007118050A Division JP4478168B2 (en) | 2007-04-27 | 2007-04-27 | Resin seal ring injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11294595A true JPH11294595A (en) | 1999-10-29 |
| JP4206145B2 JP4206145B2 (en) | 2009-01-07 |
Family
ID=14147572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09580298A Expired - Lifetime JP4206145B2 (en) | 1998-04-08 | 1998-04-08 | Resin seal ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4206145B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239954A (en) * | 2006-03-10 | 2007-09-20 | Ntn Corp | Seal ring |
| US20090322037A1 (en) * | 2007-02-01 | 2009-12-31 | Nok Corporation | Seal Ring |
| JP2010203546A (en) * | 2009-03-04 | 2010-09-16 | Nok Corp | Seal ring reforming method, seal ring reforming device and seal ring |
-
1998
- 1998-04-08 JP JP09580298A patent/JP4206145B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239954A (en) * | 2006-03-10 | 2007-09-20 | Ntn Corp | Seal ring |
| US8454024B2 (en) * | 2006-03-10 | 2013-06-04 | Ntn Corporation | Seal ring |
| US20090322037A1 (en) * | 2007-02-01 | 2009-12-31 | Nok Corporation | Seal Ring |
| US8720901B2 (en) * | 2007-02-01 | 2014-05-13 | Nok Corporation | Seal ring |
| JP2010203546A (en) * | 2009-03-04 | 2010-09-16 | Nok Corp | Seal ring reforming method, seal ring reforming device and seal ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4206145B2 (en) | 2009-01-07 |
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