JPH10299865A - Ring-shaped substrate for resin gear molding, resin gear, and method of manufacturing the same - Google Patents
Ring-shaped substrate for resin gear molding, resin gear, and method of manufacturing the sameInfo
- Publication number
- JPH10299865A JPH10299865A JP9104114A JP10411497A JPH10299865A JP H10299865 A JPH10299865 A JP H10299865A JP 9104114 A JP9104114 A JP 9104114A JP 10411497 A JP10411497 A JP 10411497A JP H10299865 A JPH10299865 A JP H10299865A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- resin
- base material
- gear
- woven fabric
- 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.)
- Pending
Links
Landscapes
- Gears, Cams (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
(57)【要約】
【課題】樹脂を含浸した織布基材で歯部が構成されてい
る樹脂歯車において、歯車全周にわたって縦糸・横糸の
乱れをなくして、機械強度を大きくかつ均一にする。
【解決手段】メタ型・パラ型アラミド繊維の混紡糸を大
径部と小径部を繰り返す蛇腹状に織った筒状織布１１
を、軸方向に巻き上げたリング状基材１２を歯部成形用
材料とする。リング状基材１２を成形金型に配置しその
内側には金属製のブッシュを配置して、架橋ポリエステ
ルアミドを成形金型内に注入して加熱加圧成形により一
体化する。成形後、リング状基材１２で構成された部分
に機械加工により歯を形成する。
(57) Abstract: In a resin gear having a tooth portion formed of a woven fabric base material impregnated with a resin, warp and weft yarns are not disturbed over the entire circumference of the gear, and mechanical strength is increased and uniformized. . A tubular woven fabric 11 in which a mixed yarn of meta-type and para-type aramid fibers is woven in a bellows shape in which a large diameter portion and a small diameter portion are repeated.
Is used as a material for forming a tooth portion using the ring-shaped base material 12 wound up in the axial direction. The ring-shaped base material 12 is arranged in a molding die, a metal bush is arranged inside the molding die, a crosslinked polyesteramide is injected into the molding die, and integrated by heat and pressure molding. After molding, teeth are formed by machining on the portion constituted by the ring-shaped base material 12.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂を含浸した織
布基材で歯部が成形されている樹脂歯車とその製造法に
関する。また、樹脂を含浸して前記歯部を成形するため
の織布基材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin gear having teeth formed of a woven fabric substrate impregnated with a resin, and a method of manufacturing the same. Further, the present invention relates to a woven fabric base material for forming the tooth portion by impregnating a resin.
【０００２】[0002]
【従来の技術】樹脂歯車、特にその歯部の構成は、特公
昭５４−２２２１７号公報に種々開示されている。すな
わち、 （１）図４（ａ）に示すように、綿布を基材としてこれ
にフェノール樹脂を含浸乾燥し、リング状に打ち抜いて
所定枚数積層したリング状基材１を加熱加圧成形し一体
化する。あるいは、同図（ｂ）に示すように、扇形に打
ち抜いてリング状に積層したリング状基材１’を加熱加
圧成形して一体化するものである。 （２）図５（ａ）に示すように、綿布を基材としてフェ
ノール樹脂を含浸乾燥し平行四辺形に裁断したシート２
を棒状に巻いて、さらに同図（ｂ）に示すように、棒状
体の両端を重ねてリングにしたリング状基材３を加熱加
圧成形するものである。 （３）図６（ａ）に示すように、シート２（図５（ａ）
に示したものと同じ）を筒状に丸め、同図（ｂ）に示す
ように、これを二重筒の押し型４内で蛇腹状に圧縮し
（二重筒の軸方向に圧縮し）、同図（ｃ）に示すよう
に、筒状に丸めたシート２を軸方向に圧縮したリング状
基材５とする。このリング状基材５を加熱加圧成形する
ものである。2. Description of the Related Art Various configurations of resin gears, particularly the structure of their teeth, are disclosed in Japanese Patent Publication No. 54-22217. (1) As shown in FIG. 4 (a), a cotton fabric is impregnated and dried with a phenolic resin, punched into a ring shape, and a predetermined number of laminated ring-shaped substrates 1 are formed by heat and pressure molding. Become Alternatively, as shown in FIG. 1B, a ring-shaped base material 1 'punched out in a fan shape and laminated in a ring shape is formed by heat and pressure molding and integrated. (2) As shown in FIG. 5A, a sheet 2 obtained by impregnating and drying a phenolic resin using a cotton cloth as a base material and cutting it into a parallelogram.
Is rolled into a rod shape, and as shown in FIG. 4B, a ring-shaped substrate 3 in which both ends of a rod-shaped body are overlapped to form a ring is heated and pressed. (3) As shown in FIG. 6A, the sheet 2 (FIG. 5A)
(The same as shown in FIG. 3) is rounded into a cylindrical shape, and as shown in FIG. 4B, it is compressed in a bellows shape in the double-die press mold 4 (compressed in the axial direction of the double cylinder). As shown in FIG. 2C, a ring-shaped substrate 5 is obtained by compressing the sheet 2 rolled into a cylindrical shape in the axial direction. This ring-shaped substrate 5 is formed by heating and pressing.
【０００３】また、特開平８−１９７６３０号公報に
も、別のリング状基材が開示されている。すなわち、 （４）図７に示すように、大径部と小径部を繰り返す蛇
腹状に織られた筒状織布６を、軸方向に折り畳んでリン
グにしてなるリング状基材７とする。このリング状基材
７を加熱加圧成形するものである。[0003] Japanese Patent Application Laid-Open No. 8-197630 discloses another ring-shaped substrate. (4) As shown in FIG. 7, a tubular woven fabric 6 woven in a bellows shape in which a large-diameter portion and a small-diameter portion are repeated is axially folded to form a ring-shaped base material 7. This ring-shaped substrate 7 is formed by heating and pressing.
【０００４】上記それぞれのリング状基材を成形すると
きは、例えば、図２に示すように、成形金型１４内に配
置し、当該リング状基材の内側に金属製のブッシュ１５
を配置して一体に加圧加熱成形する（図２では、リング
状基材を符号１２で示してある）。成形後に、前記リン
グ状基材で構成された成形体部分に機械加工により歯を
形成する。尚、成形金型に配置したリング状基材と金属
製のブッシュとの間には、必要に応じて、別途、ウェブ
構成用成形材料を充填して一体化することもある。ウェ
ブ構成用成形材料は、例えば、シート２を裁断したチッ
プ片を仮成形してリング状に固めたものである。When each of the above-mentioned ring-shaped substrates is molded, for example, as shown in FIG. 2, it is placed in a molding die 14 and a metal bush 15 is placed inside the ring-shaped substrate.
And press-molded integrally (in FIG. 2, the ring-shaped substrate is indicated by reference numeral 12). After the molding, teeth are formed on the molded body portion constituted by the ring-shaped substrate by machining. In addition, between the ring-shaped base material and the metal bush arranged in the molding die, if necessary, a molding material for forming a web may be separately filled and integrated. The web forming material is, for example, a material obtained by temporarily forming a chip piece obtained by cutting the sheet 2 and solidifying it into a ring shape.
【０００５】[0005]
【発明が解決しようとする課題】上記（１）の技術によ
る樹脂歯車では、綿布の縦糸あるいは横糸の方向を歯車
の全周にわたって歯の高さ方向に配列させることができ
ない。縦糸あるいは横糸の方向を歯の高さ方向と一致さ
せることより歯の強度は最も大きくなるが、前記のよう
な構成では歯の強度のバラツキができてしまう。上記
（２）の技術による樹脂歯車では、綿布の縦糸あるいは
横糸の方向を歯車のほぼ全周にわたって歯部の高さ方向
に配向させることができる。しかし、リングにしたとき
にできる棒状体の両端の重ね合せ部では基材が連続して
いない。従って、この部分の機械強度は、基材が連続し
ている他の部分より弱くなる。上記（３）の技術による
樹脂歯車では、筒状に丸めたシート２を軸方向に圧縮す
るときに、縦糸と横糸の方向が乱れる。また、シート２
を筒状に丸めるので、上記（２）の技術と同様に基材が
連続していない部分ができる。上記（４）の技術による
樹脂歯車では、筒状織布６を軸方向に折り畳んだとき、
大径部及び小径部の寸法差に起因して基材密度が均一に
ならず、縦糸の方向が乱れてシワになる。また、大径部
及び小径部の折り返し部分の基材密度が高くなり強度が
低下する傾向にある。さらに、上記（１）の技術では、
リング状あるいは扇形に打ち抜くときに多くの端材がで
きるし、上記（２）及び（３）の技術でも、所定寸法に
裁断したシート２を使用するので、当該所定寸法には足
りない端材ができる。In the resin gear according to the above technique (1), the direction of the warp or weft of the cotton cloth cannot be arranged in the height direction of the teeth over the entire circumference of the gear. The strength of the teeth is maximized by matching the direction of the warp or the weft with the direction of the height of the teeth. However, in the above-described configuration, the strength of the teeth varies. In the resin gear according to the technique (2), the direction of the warp or the weft of the cotton cloth can be oriented in the height direction of the tooth portion over substantially the entire circumference of the gear. However, the base material is not continuous at the overlapping portions at both ends of the rod-like body formed when the ring is formed. Therefore, the mechanical strength of this part is lower than that of the other part where the base material is continuous. In the resin gear according to the technique (3), when the sheet 2 rolled into a cylindrical shape is compressed in the axial direction, the directions of the warp and the weft are disturbed. Also, sheet 2
Is rolled into a cylindrical shape, so that a portion where the base material is not continuous is formed as in the technique (2). In the resin gear according to the technique (4), when the tubular woven fabric 6 is folded in the axial direction,
Due to the dimensional difference between the large-diameter portion and the small-diameter portion, the substrate density is not uniform, and the warp direction is disturbed, resulting in wrinkles. In addition, the base material density of the folded portion of the large diameter portion and the small diameter portion tends to increase, and the strength tends to decrease. Further, in the technique (1),
A large amount of offcuts are formed when punching into a ring or a fan shape, and the techniques (2) and (3) also use the sheet 2 cut to a predetermined size. it can.
【０００６】本発明が解決しようとする課題は、樹脂を
含浸した織布基材で歯部が構成されている樹脂歯車にお
いて、歯車の全周にわたって機械強度を大きくかつ均一
にすることである。また、別の課題は、そのような樹脂
歯車成形のためのリング状基材を提供することである。
さらに、基材の端材ができないようにし、材料歩留りを
良くすることである。The problem to be solved by the present invention is to make the mechanical strength large and uniform over the entire circumference of a resin gear in which the teeth are formed by a woven fabric base material impregnated with resin. Another object is to provide a ring-shaped substrate for forming such a resin gear.
Another object of the present invention is to prevent material from being cut off from the base material and improve the material yield.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明に係る樹脂歯車成形用のリング状基材は、大
径部と小径部を繰り返す蛇腹状に織られた筒状織布を軸
方向に巻き上げてリング状にしたことを特徴とする。ま
た、本発明に係る樹脂歯車は、樹脂を含浸した織布基材
で歯部が構成されているものにおいて、前記織布基材が
上記のリング状基材であることを特徴とする。In order to solve the above-mentioned problems, a ring-shaped base material for forming a resin gear according to the present invention is a tubular woven fabric woven in a bellows shape in which a large diameter portion and a small diameter portion are repeated. Is rolled up in the axial direction to form a ring. Further, the resin gear according to the present invention is characterized in that the tooth portion is formed by a woven fabric base material impregnated with a resin, wherein the woven base material is the above-mentioned ring-shaped base material.
【０００８】本発明に係るリング状基材は、筒状織布を
軸方向に巻き上げてリング状にしているので、周方向に
連続しており継ぎ目がない。しかも、大径部と小径部を
繰り返す蛇腹状に織られた筒状織布を軸方向に巻き上げ
ることにより、軸方向に折り畳んでリング状にした場合
にできるシワもなく、縦糸の乱れをなくすことができ
る。寸胴の筒状織布を軸方向に巻き上げてリング状基材
にすることもできるが、筒状織布に径方向の伸縮性がな
い限り前記巻き上げは難しく、径方向の伸縮性がない筒
状織布を巻き上げると、やはりシワができる。シワのな
いリング状基材は、大径部と小径部を繰り返す蛇腹状に
織られた筒状織布の巻き上げにより初めて可能になる。
従って、本発明に係るリング状基材に樹脂を含浸して歯
部が構成された樹脂歯車は、歯車の全周にわたって機械
強度が均一になり、歯車に最も強度がかかる歯の高さ方
向に縦糸の方向を一致させることができる。[0008] The ring-shaped substrate according to the present invention is formed by winding a tubular woven fabric in the axial direction to form a ring, so that it is continuous in the circumferential direction and has no seams. In addition, by winding up a bellows-shaped tubular woven fabric that repeats a large-diameter portion and a small-diameter portion in the axial direction, there is no wrinkle that would occur when folded into a ring shape in the axial direction, eliminating warp distortion. Can be. It is also possible to roll up a cylindrical woven fabric of a small body in the axial direction to form a ring-shaped substrate, but it is difficult to wind up the roll unless the tubular woven fabric has elasticity in the radial direction. When the woven fabric is rolled up, wrinkles are formed. A ring-shaped base material without wrinkles can be obtained only by winding up a bellows-shaped tubular woven fabric in which a large diameter portion and a small diameter portion are repeated.
Therefore, the resin gear in which the ring-shaped base material according to the present invention is impregnated with resin to form a tooth portion has a uniform mechanical strength over the entire circumference of the gear, and the gear has the highest strength in the tooth height direction. The direction of the warp can be matched.
【０００９】本発明に係る樹脂歯車の製造法は、樹脂を
含浸した織布基材で歯部を成形する方法において、上記
本発明に係るリング状基材を成形金型に配置した後に、
成形金型に液状樹脂を注入して当該リング状基材に含浸
し成形することを特徴とする。また、本発明に係る別の
製造法は、上記本発明に係るリング状基材に熱硬化性樹
脂を含浸乾燥して半硬化状態とし、金型に配置して成形
することを特徴とする。[0009] In a method of manufacturing a resin gear according to the present invention, in the method of forming a tooth portion with a woven fabric substrate impregnated with a resin, after disposing the ring-shaped substrate according to the present invention in a molding die,
It is characterized in that a liquid resin is injected into a molding die and the ring-shaped base material is impregnated and molded. Further, another manufacturing method according to the present invention is characterized in that the ring-shaped substrate according to the present invention is impregnated with a thermosetting resin and dried to be in a semi-cured state, placed in a mold, and molded.
【００１０】本発明に係る樹脂歯車の製造法によれば、
筒状織布を軸方向に巻き上げたリング状基材で歯部を構
成する。従って、筒状織布は、所定の軸方向長さで裁断
することにより、あるいは所定の軸方向長さに織り上げ
て使用することにより、シートを打ち抜いたり所定寸法
に裁断するときのような端材ができない。According to the method for manufacturing a resin gear according to the present invention,
The tooth portion is constituted by a ring-shaped base material obtained by winding a tubular woven fabric in an axial direction. Therefore, the tubular woven fabric is cut off at a predetermined axial length, or is woven to a predetermined axial length and used to cut off the sheet material when punching a sheet or cutting to a predetermined size. Can not.
【００１１】[0011]
【発明の実施の形態】図１（ａ）に示すように、大径部
と小径部を繰り返す蛇腹状に織られた筒状織布１１を軸
方向に巻き上げる。そして、同図（ｂ）に示すようにリ
ング状基材１２とする。筒状織布１１を構成する糸は、
アラミド繊維からなる糸やポリアミド繊維からなる糸、
綿糸、カバリング糸等である。筒状織布１１の大径部と
小径部の寸法、大径部と小径部の繰り返しピッチ寸法
（ある大径部から次の大径部までの寸法）は、次のよう
に設定するのが好ましい。すなわち、リング状基材１２
で構成される歯車（図３（ａ）参照）の外径をＲ1、同
歯車の内径をＲ2、同歯車の厚さをＴとして、筒状織布
１１の大径部の寸法を（Ｒ1＋２Ｔ）とし、小径部の寸
法を（Ｒ2＋２Ｔ）とする。また、大径部と小径部の繰
り返しピッチ寸法をリング状基材１２で構成される歯車
の断面周囲寸法とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 (a), a tubular woven fabric 11 woven in a bellows shape in which a large diameter portion and a small diameter portion are repeated is wound up in the axial direction. Then, a ring-shaped substrate 12 is formed as shown in FIG. The yarn constituting the tubular woven fabric 11 is
Aramid fiber or polyamide fiber yarn,
Cotton yarn, covering yarn and the like. The dimensions of the large-diameter portion and the small-diameter portion of the tubular woven fabric 11 and the repetition pitch dimension of the large-diameter portion and the small-diameter portion (dimension from one large-diameter portion to the next large-diameter portion) should be set as follows. preferable. That is, the ring-shaped substrate 12
When the outer diameter of the gear (see FIG. 3A) is represented by R 1 , the inner diameter of the gear is R 2 , and the thickness of the gear is T, the dimension of the large-diameter portion of the tubular woven fabric 11 is represented by ( R 1 + 2T) and then, the size of the small-diameter portion and (R 2 + 2T). The repetition pitch dimension of the large diameter portion and the small diameter portion is defined as the cross-sectional peripheral size of the gear formed of the ring-shaped base material 12.
【００１２】リング状基材１２は、図１（ｃ）に示すよ
うに、成形に先立ち仮成形金型１３で圧縮して断面を矩
形にしておくと、かさばらずにその後の取扱性が良く成
形金型への投入もしやすい。このように用意したリング
状基材１２を、図２に示すように成形金型１４に投入
し、リング状基材１２の中央には金属製のブッシュ１５
を配置して加熱加圧成形により一体化する。リング状基
材１２への樹脂含浸は、リング状基材１２とブッシュ１
５を成形金型１４に配置した後、成形金型１４の型締め
をし、成形金型１４に液状樹脂を注入することにより実
施できる。液状樹脂を注入する前に、成形金型１４内を
減圧状態にしておくことは、液状樹脂のリング状基材１
２への浸透が円滑に行なわれるので好ましい方法であ
る。リング状基材１２への樹脂含浸の別の方法は、予め
リング状基材１２に熱硬化性樹脂を含浸し乾燥して、半
硬化状態にしておく方法である。このように樹脂含浸済
みのリング状基材を成形金型１４にブッシュ１５ととも
に配置して、加熱加圧成形により一体化する。リング状
基材１２に含浸する樹脂は、リング状基材１２を成形金
型１４に配置してから、成形金型１４に液状樹脂を注入
しリング状基材１２に含浸する場合には、ＣＰレジン
（架橋ポリエステルアミド、架橋ポリアミノアミド）、
エポキシ樹脂、ポリイミド等の樹脂が適当である。ま
た、リング状基材に予め熱硬化性樹脂を含浸乾燥して半
硬化状態としてから成形金型に配置し成形する場合は、
フェノール樹脂、エポキシ樹脂、ポリエステル、ポリイ
ミド等の樹脂が適当である。As shown in FIG. 1 (c), when the ring-shaped substrate 12 is compressed by a temporary molding die 13 to form a rectangular cross section prior to molding, the ring-shaped substrate 12 is not bulky and has good handleability thereafter. It is easy to put in the mold. The ring-shaped base material 12 thus prepared is put into a molding die 14 as shown in FIG.
And integrated by heating and pressing. The resin impregnation into the ring-shaped base material 12 is performed by using the ring-shaped base material 12 and the bush 1.
After arranging the mold 5 in the molding die 14, the molding die 14 is closed and a liquid resin is injected into the molding die 14. Keeping the inside of the molding die 14 in a reduced pressure state before injecting the liquid resin requires the ring-shaped base material 1 of the liquid resin.
This is a preferred method because the permeation into 2 is performed smoothly. Another method of impregnating the ring-shaped base material 12 with the resin is a method of impregnating the ring-shaped base material 12 with a thermosetting resin in advance, drying the semi-cured state. The ring-shaped base material impregnated with the resin is arranged together with the bush 15 in the molding die 14 and integrated by heating and pressing. When the resin to be impregnated into the ring-shaped base material 12 is such that the ring-shaped base material 12 is arranged in the molding die 14 and then the liquid resin is injected into the molding die 14 and impregnated into the ring-shaped base material 12, CP is used. Resin (crosslinked polyesteramide, crosslinked polyaminoamide),
Resins such as epoxy resin and polyimide are suitable. In addition, when the ring-shaped substrate is impregnated with a thermosetting resin in advance and dried to be in a semi-cured state, and then placed in a molding die and molded,
Resins such as phenolic resin, epoxy resin, polyester and polyimide are suitable.
【００１３】樹脂を含浸したリング状基材とブッシュを
成形金型で加熱加圧成形により一体化した後に、リング
状基材で構成された部分に機械加工により歯を形成す
る。After the ring-shaped base material impregnated with the resin and the bush are integrated by heat and pressure molding in a molding die, teeth are formed by machining on the portion constituted by the ring-shaped base material.
【００１４】[0014]
実施例 メタ型アラミド繊維（帝人製「コーネックス」）とパラ
型アラミド繊維（帝人製「テクノーラ」）の混紡糸で、
大径部と小径部を繰り返す蛇腹状の筒状織布を平織りし
た。大径部１０５mm、小径部８５mm、大径部と小径部の
繰り返しピッチ寸法６０mmである。この筒状織布１１
を、図１（ａ）に示したように、小径部の位置から外側
へ巻き上げていき、リング状基材１２とする。このリン
グ状基材１２を、図１（ｃ）に示したように仮成形金型
１３に投入し、熱をかけて圧縮し、断面矩形のリング状
基材１２とする。次に、図２に示すように、これを成形
金型１４に配置し、その中央には金属製のブッシュ１５
を配置して、２００Kg／cm2の圧力で型締し、架橋ポリ
エステルアミドを成形金型１４内に注入して、１６０℃
でリング状基材と金属製のブッシュを一体に成形した。
金型内に架橋ポリエステルアミドを注入するとき、金型
内の圧力を６０mmHg以下にしたので架橋ポリエステルア
ミドの注入が良好に行なわれ、金型内を減圧状態にしな
い場合より、成形品中にボイドが残留しにくい成形を行
なうことができた。成形後、リング状基材１２で構成さ
れた部分に機械加工により歯を形成し樹脂歯車とした。
尚、リング状基材１２で構成された部分は、外径８５m
m、内径６５mm、厚さ１０mmである。また、リング状基
材１２で構成された部分の断面周囲の長さは６０mmであ
る。Example A mixed spinning of meta-type aramid fiber ("Conex" manufactured by Teijin) and para-type aramid fiber ("Technola" manufactured by Teijin)
A bellows-like tubular woven fabric that repeats a large diameter portion and a small diameter portion was plain-woven. The large-diameter portion is 105 mm, the small-diameter portion is 85 mm, and the pitch between the large-diameter portion and the small-diameter portion is 60 mm. This tubular woven cloth 11
As shown in FIG. 1 (a), this is rolled outward from the position of the small diameter portion to form a ring-shaped substrate 12. This ring-shaped substrate 12 is put into a temporary molding die 13 as shown in FIG. 1C, and is heated and compressed to obtain a ring-shaped substrate 12 having a rectangular cross section. Next, as shown in FIG. 2, this is placed in a molding die 14, and a metal bush 15 is provided in the center thereof.
Is placed, the mold is clamped at a pressure of 200 kg / cm 2 , the crosslinked polyesteramide is injected into the molding die 14,
The ring-shaped base material and the metal bush were integrally formed.
When the crosslinked polyesteramide was injected into the mold, the pressure in the mold was reduced to 60 mmHg or less, so that the injection of the crosslinked polyesteramide was performed favorably. It was possible to carry out molding in which no residue was left. After the molding, teeth were formed by machining on the portion constituted by the ring-shaped base material 12 to obtain a resin gear.
In addition, the portion composed of the ring-shaped substrate 12 has an outer diameter of 85 m.
m, inner diameter 65 mm, thickness 10 mm. The length around the cross section of the portion constituted by the ring-shaped substrate 12 is 60 mm.
【００１５】従来例１ 実施例と同様のアラミド繊維からなる混紡糸を平織りし
た布にフェノール樹脂を含浸乾燥し、図４（ａ）に示す
ように、リング状に打ち抜いて所定枚数積層したリング
状基材１を用い、リング状基材１と金属製のブッシュを
成形金型に配置して一体に成形した。以下、実施例と同
様に歯を形成し樹脂歯車とした。Conventional Example 1 A woven phenolic resin was impregnated and dried in a plain woven cloth made of the same blended yarn made of aramid fiber as in the example, and as shown in FIG. Using the substrate 1, the ring-shaped substrate 1 and a metal bush were arranged in a molding die and molded integrally. Hereinafter, a resin gear was formed by forming teeth in the same manner as in the example.
【００１６】従来例２ 実施例と同様のアラミド繊維からなる混紡糸を平織りし
た布（但し、樹脂は含浸していない）を、図５（ａ）に
示すように所定寸法に裁断して棒状に巻き、同図（ｂ）
に示すように棒状体の両端を重ねてリングにしたリング
状基材３を用い、以下、実施例と同様に成形と歯の形成
を行ない樹脂歯車とした。Conventional Example 2 A cloth (not impregnated with a resin) obtained by plain weaving a blended yarn made of the same aramid fiber as in the example was cut into a predetermined size as shown in FIG. Roll, same figure (b)
As shown in the figure, a ring-shaped base material 3 was used in which both ends of a rod-shaped body were overlapped to form a ring.
【００１７】従来例３ 実施例と同様のアラミド繊維からなる混紡糸を平織りし
た布にフェノール樹脂を含浸乾燥したシート２を、図６
（ａ）に示すように筒状に丸め、同図（ｂ）に示すよう
に、これを二重筒の押し型４内で軸方向に圧縮して蛇腹
状にし、同図（ｃ）に示すようにリングにしたリング状
基材５と金属製のブッシュを成形金型に配置して一体に
成形した。以下、実施例と同様に歯を形成し樹脂歯車と
した。Conventional Example 3 A sheet 2 obtained by impregnating and drying a phenolic resin on a plain woven cloth of the same blended yarn made of aramid fiber as in the example shown in FIG.
As shown in (a), it is rolled into a cylinder, and as shown in (b), it is compressed in the axial direction in a double-cylinder press die 4 to form a bellows, as shown in (c). The ring-shaped base member 5 formed into a ring and a metal bush were arranged in a molding die and molded integrally. Hereinafter, a resin gear was formed by forming teeth in the same manner as in the example.
【００１８】従来例４ 実施例と同様のアラミド繊維からなる混紡糸で、大径部
と小径部を繰り返す蛇腹状の筒状織布を平織りした。大
径部１０５mm、小径部８５mm、ピッチ寸法３０mmであ
る。この筒状織布６を、図７に示すように軸方向に折り
畳んでリング状基材７とする。このリング状基材７を用
い、以下、実施例と同様に成形と歯の形成を行ない樹脂
歯車とした。尚、リング状基材７で構成された部分は、
外径８５mm、内径６５mm、厚さ１０mmである。また、リ
ング状基材７で構成された部分の断面周囲の長さは６０
mmである。Conventional Example 4 A bellows-shaped tubular woven fabric in which a large-diameter portion and a small-diameter portion are repeated was plain-woven with a blend yarn made of the same aramid fiber as in the example. The large diameter portion is 105 mm, the small diameter portion is 85 mm, and the pitch is 30 mm. The tubular woven fabric 6 is folded in the axial direction as shown in FIG. Using this ring-shaped base material 7, a resin gear was formed by forming and forming teeth in the same manner as in the examples. In addition, the part comprised by the ring-shaped base material 7
The outer diameter is 85 mm, the inner diameter is 65 mm, and the thickness is 10 mm. In addition, the length around the cross section of the portion constituted by the ring-shaped substrate 7 is 60
mm.
【００１９】上記実施例と従来例１〜４の樹脂歯車の特
性を表１に示す。各特性の測定は次のようにして行なっ
た。曲げ強度は、図３（ａ）に示すように、製造した樹
脂歯車の歯部から試験片２０を切り出し、同図（ｂ）に
示すように試験片が破壊される曲げ強度を測定したもの
である。Ａ欄の測定値は、従来例２では棒状体をリング
にした継ぎ目の部分、従来例３ではシートを筒状に丸め
た継ぎ目部分に相当する箇所から、それぞれ切り出した
試験片の曲げ強度を示す。Ｂ欄は、歯部の前記以外の部
分から切り出した試験片の曲げ強度を示す（実施例、従
来例１，４では継ぎ目はない）。実装耐久時間は、自動
車エンジンのカムギヤ加速テスト（回転数：３０００ｒ
ｐｍ，油温１３０℃，歯元負荷応力１８kg／mm2）での
耐久時間を測定した。寸法変化率は、樹脂歯車を熱風循
環乾燥機に入れて２００℃×５００hrの熱処理に供し、
処理前後の歯車外径の寸法変化率を測定した。Table 1 shows the characteristics of the resin gears of the above embodiment and Conventional Examples 1 to 4. The measurement of each characteristic was performed as follows. The bending strength is obtained by cutting a test piece 20 from the tooth portion of the manufactured resin gear as shown in FIG. 3A and measuring the bending strength at which the test piece is broken as shown in FIG. 3B. is there. The measured value in column A shows the bending strength of a test piece cut out from a portion corresponding to a seam portion where a rod-shaped body is formed into a ring in Conventional Example 2 and a portion corresponding to a seam portion where a sheet is rolled into a cylinder in Conventional Example 3. . Column B shows the bending strength of the test piece cut out from the other part of the tooth part (there is no seam in Examples and Conventional Examples 1 and 4). The mounting endurance time was measured using the cam gear acceleration test of an automobile engine (rotation speed: 3000r).
pm, oil temperature of 130 ° C., and tooth root load stress of 18 kg / mm 2 ). The dimensional change rate is as follows. The resin gear is put into a hot air circulating dryer and subjected to a heat treatment at 200 ° C. for 500 hours.
The dimensional change rate of the gear outer diameter before and after the treatment was measured.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１から明らかなように、本発明に係る実
施例の樹脂歯車は、筒状織布をリング状基材にしたとき
にシワの発生がなく糸の方向が乱れないために、大きな
機械強度を保持している。また、前記継ぎ目部分がない
ので全周にわたって歯の強度が均一である。従来例１の
歯車は、縦糸あるいは横糸の方向を歯車の全周にわたっ
て歯の高さ方向に配列させることができないために、強
度、耐久性とも低下する。また、従来例２，３の歯車
は、棒状体をリングにした継ぎ目部分あるいはシートを
筒状に丸めた継ぎ目部分に相当する箇所の曲げ強度が他
の部分より小さい。従来例４の歯車は、筒状織布の大径
部及び小径部の折り畳み部の基材密度が高くなり、強度
が小さくなる。As is apparent from Table 1, the resin gear of the embodiment according to the present invention has a large size because the wrinkle does not occur and the direction of the yarn is not disturbed when the cylindrical woven fabric is used as the ring-shaped base material. Maintains mechanical strength. Further, since there is no seam portion, the strength of the teeth is uniform over the entire circumference. In the gear of Conventional Example 1, since the direction of the warp or weft cannot be arranged in the height direction of the teeth over the entire circumference of the gear, both the strength and the durability are reduced. Further, in the gears of Conventional Examples 2 and 3, the bending strength at the portion corresponding to the joint portion where the rod is formed into a ring or the joint portion where the sheet is rolled into a cylindrical shape is smaller than the other portions. In the gear of Conventional Example 4, the base material density of the folded portions of the large-diameter portion and the small-diameter portion of the tubular woven fabric increases, and the strength decreases.
【００２２】上記実施例では、リング状基材１２を成形
金型に配置してから成形金型に液状樹脂を注入し、リン
グ状基材に含浸させた。そのほかに、リング状基材１２
にフェノール樹脂等の熱硬化性樹脂を含浸乾燥して半硬
化状態とし、これを成形金型に配置して加熱加圧成形し
た樹脂歯車も、上記と同様の効果を有する。また、上記
実施例では、リング状基材１２の内側に金属製のブッシ
ュ１５だけを配置して成形を行なっているが、リング状
基材１２とブッシュ１５の間を埋める成形材料を別途充
填してもよい。In the above embodiment, the ring-shaped substrate 12 was placed in a molding die, and then the liquid resin was injected into the molding die to impregnate the ring-shaped substrate. In addition, the ring-shaped substrate 12
A resin gear formed by impregnating a thermosetting resin such as a phenol resin or the like into a semi-cured state, disposing the semi-cured state in a molding die, and molding under heat and pressure has the same effect as described above. Further, in the above embodiment, the metal bush 15 alone is arranged inside the ring-shaped base material 12 for molding, but a molding material filling the space between the ring-shaped base material 12 and the bush 15 is separately filled. You may.
【００２３】[0023]
【発明の効果】上述のように、本発明に係る樹脂歯車
は、蛇腹状に織った筒状織布を軸方向に巻き上げて樹脂
歯車成形用のリング状基材を構成するので、筒状織布の
糸の方向が、歯車の歯の最も強度がかかる方向と一致
し、基材の強度を最大限に引き出すことができる。すな
わち、縦糸はリング状基材の径方向に放射状に配列さ
れ、横糸はリング状基材と同心円状に配列され、糸の配
列の乱れが少ない。また、歯を構成するリング状基材に
継ぎ目がないので、歯車の全周にわたって均一な強度を
保持することができる。リング状基材を作るときに端材
ができにくいので材料歩留りも向上する。As described above, the resin gear according to the present invention forms a ring-shaped base material for forming a resin gear by winding up a tubular woven fabric woven in a bellows shape in the axial direction. The direction of the yarn of the cloth coincides with the direction in which the gear teeth have the highest strength, so that the strength of the base material can be maximized. That is, the warp yarns are arranged radially in the radial direction of the ring-shaped base material, and the weft yarns are arranged concentrically with the ring-shaped base material, so that the arrangement of the yarns is small. In addition, since the ring-shaped base material constituting the teeth has no joint, uniform strength can be maintained over the entire circumference of the gear. Since it is difficult to produce offcuts when producing a ring-shaped substrate, the material yield is also improved.
【図１】本発明に係る実施例においてリング状基材を構
成する様子を示す説明図である。FIG. 1 is an explanatory view showing how a ring-shaped substrate is formed in an example according to the present invention.
【図２】本発明に係る実施例において樹脂歯車を加熱加
圧成形する様子を示す断面説明図である。FIG. 2 is an explanatory cross-sectional view showing how a resin gear is heated and pressed in an embodiment according to the present invention.
【図３】本発明に係る実施例の樹脂歯車とその曲げ強度
評価方法を示す説明図である。FIG. 3 is an explanatory view showing a resin gear of an example according to the present invention and a method for evaluating bending strength thereof.
【図４】従来のリング状基材の第一の例を示す説明図で
ある。FIG. 4 is an explanatory view showing a first example of a conventional ring-shaped substrate.
【図５】従来のリング状基材の第二の例を示す説明図で
ある。FIG. 5 is an explanatory view showing a second example of a conventional ring-shaped substrate.
【図６】従来のリング状基材の第三の例を示す説明図で
ある。FIG. 6 is an explanatory view showing a third example of a conventional ring-shaped substrate.
【図７】従来のリング状基材の第四の例を示す説明図で
ある。FIG. 7 is an explanatory view showing a fourth example of a conventional ring-shaped substrate.
１１は筒状織布 １２はリング状基材 １３は仮成形金型 １４は成形金型 １５はブッシュ 11 is a tubular woven fabric 12 is a ring-shaped base material 13 is a temporary forming die 14 is a forming die 15 is a bush
Claims (6)
た筒状織布を軸方向に巻き上げリングにしてなる樹脂歯
車成形用のリング状基材。1. A ring-shaped base material for forming a resin gear, wherein a cylindrical woven fabric woven in a bellows shape in which a large diameter portion and a small diameter portion are repeated is formed into an axially wound ring.
1、同歯車の内径をＲ2、同歯車の厚さをＴとして、 筒状織布の大径部の寸法が、（Ｒ1＋２Ｔ）であり、筒
状織布の小径部の寸法が、（Ｒ2＋２Ｔ）であり、筒状
織布の大径部と小径部の繰り返しピッチが、リング状基
材で構成される歯車の断面周囲寸法である請求項１記載
の樹脂歯車成形用のリング状基材。2. The outer diameter of a gear composed of a ring-shaped base material is R
1 , the inner diameter of the gear is R 2 , and the thickness of the gear is T, the dimension of the large-diameter portion of the tubular woven fabric is (R 1 + 2T), and the dimension of the small-diameter portion of the tubular woven fabric is 2. The ring for resin gear molding according to claim 1, wherein (R 2 + 2T), and the repetition pitch of the large-diameter portion and the small-diameter portion of the tubular woven fabric is the cross-sectional peripheral dimension of the gear formed of the ring-shaped base material. Substrate.
ている樹脂歯車において、前記織布基材が請求項１又は
２に記載の樹脂歯車成形用のリング状基材であることを
特徴とする樹脂歯車。3. A resin gear having a tooth portion formed of a woven fabric substrate impregnated with a resin, wherein the woven fabric substrate is the ring-shaped base material for forming a resin gear according to claim 1 or 2. A resin gear characterized by the above.
樹脂歯車の製造において、請求項１又は２に記載の樹脂
歯車成形用のリング状基材を成形金型に配置した後に、
成形金型に液状樹脂を注入して当該リング状基材に含浸
し成形することを特徴とする樹脂歯車の製造法。4. A method of manufacturing a resin gear in which a tooth portion is formed from a woven fabric substrate impregnated with a resin, after the ring-shaped base material for forming a resin gear according to claim 1 or 2 is disposed in a molding die. ,
A method for manufacturing a resin gear, comprising injecting a liquid resin into a molding die, impregnating the ring-shaped substrate, and molding the resin.
圧状態にしておくことを特徴とする請求項４記載の樹脂
歯車の製造法。5. The method for manufacturing a resin gear according to claim 4, wherein the pressure inside the molding die is reduced before injecting the liquid resin.
樹脂歯車の製造において、請求項１又は２に記載の樹脂
歯車成形用のリング状基材に熱硬化樹脂を含浸乾燥して
半硬化状態とし、これを成形金型に配置して成形するこ
とを特徴とする樹脂歯車の製造法。6. A resin gear in which a tooth portion is formed from a woven base material impregnated with a resin, wherein the ring-shaped base material for forming a resin gear according to claim 1 is impregnated with a thermosetting resin and dried. A semi-cured state, and disposing it in a molding die for molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9104114A JPH10299865A (en) | 1997-04-22 | 1997-04-22 | Ring-shaped substrate for resin gear molding, resin gear, and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9104114A JPH10299865A (en) | 1997-04-22 | 1997-04-22 | Ring-shaped substrate for resin gear molding, resin gear, and method of manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10299865A true JPH10299865A (en) | 1998-11-13 |
Family
ID=14372107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9104114A Pending JPH10299865A (en) | 1997-04-22 | 1997-04-22 | Ring-shaped substrate for resin gear molding, resin gear, and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10299865A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002113788A (en) * | 2000-10-11 | 2002-04-16 | Teijin Ltd | Fiber reinforced resin composite |
| EP1145830A3 (en) * | 2000-04-12 | 2002-09-18 | Shin-Kobe Electric Machinery Co. Ltd | Gear made of fiber reinforced resin and method for manufacturing same |
| JP2005121237A (en) * | 2005-02-03 | 2005-05-12 | Shin Kobe Electric Mach Co Ltd | Resin gear |
| JP2011033200A (en) * | 2010-11-16 | 2011-02-17 | Shin Kobe Electric Mach Co Ltd | Method of manufacturing resin gear |
| JP2013544676A (en) * | 2010-10-21 | 2013-12-19 | アルバニー エンジニアード コンポジッツ インコーポレイテッド | Woven preform, fiber reinforced composite, and production method thereof |
-
1997
- 1997-04-22 JP JP9104114A patent/JPH10299865A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1145830A3 (en) * | 2000-04-12 | 2002-09-18 | Shin-Kobe Electric Machinery Co. Ltd | Gear made of fiber reinforced resin and method for manufacturing same |
| US6591708B2 (en) | 2000-04-12 | 2003-07-15 | Shin-Kobe Electric Machinery Co., Ltd. | Gear made of fiber reinforced resin and method for manufacturing same |
| JP2002113788A (en) * | 2000-10-11 | 2002-04-16 | Teijin Ltd | Fiber reinforced resin composite |
| JP2005121237A (en) * | 2005-02-03 | 2005-05-12 | Shin Kobe Electric Mach Co Ltd | Resin gear |
| JP2013544676A (en) * | 2010-10-21 | 2013-12-19 | アルバニー エンジニアード コンポジッツ インコーポレイテッド | Woven preform, fiber reinforced composite, and production method thereof |
| KR20140048835A (en) * | 2010-10-21 | 2014-04-24 | 알바니 엔지니어드 콤포짓스, 인크. | Woven preforms, fiber reinforced composites, and methods of making therof |
| US10266972B2 (en) | 2010-10-21 | 2019-04-23 | Albany Engineered Composites, Inc. | Woven preforms, fiber reinforced composites, and methods of making thereof |
| JP2011033200A (en) * | 2010-11-16 | 2011-02-17 | Shin Kobe Electric Mach Co Ltd | Method of manufacturing resin gear |
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