JPS589839A - Coating of optical fiber - Google Patents

Coating of optical fiber

Info

Publication number
JPS589839A
JPS589839A JP56104262A JP10426281A JPS589839A JP S589839 A JPS589839 A JP S589839A JP 56104262 A JP56104262 A JP 56104262A JP 10426281 A JP10426281 A JP 10426281A JP S589839 A JPS589839 A JP S589839A
Authority
JP
Japan
Prior art keywords
optical fiber
coating
die
support
gas
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
Application number
JP56104262A
Other languages
Japanese (ja)
Inventor
Takao Kimura
隆男 木村
Masao Nishimura
西村　真雄
Masayuki Nishimoto
西本　征幸
Kenichi Fuse
憲一 布施
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Furukawa Electric Co Ltd
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Furukawa Electric Co Ltd
Priority to JP56104262A priority Critical patent/JPS589839A/en
Publication of JPS589839A publication Critical patent/JPS589839A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/12—General methods of coating; Devices therefor

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

PURPOSE:To improve the uniformity of the coating thickness and to prevent the damage of an optical fiber with external force, by passing the optical fiber before the coating operation through a device for aligning the fiber using the flow of gas, thereby keeping the optical fiber to the proper position in the coating vessel. CONSTITUTION:The perform rod 10 as raw material of an optical fiber is heated and molten in a spinning furnace 1 and drawn to an optical fiber 11. The fiber 11 is passed through the aligning device 2 and the coating vessel 3, and coated with a coating material such as silicone rubber, epoxy resin, etc. In the above procedure, an inert gas such as Ar, He, N, etc. is introduced into the aligning device 2 from the gas inlets 6A and 6B and blasted through the upper and the lower aligning orifices 8A and 8B. The optical fiber 11 is supported stably at the center of the aligning orifices 8A and 8B by the flow of the gas, and is passed accurately at the center of the die 4 of the coating vessel 2 aligned with the aligning device 2. Accordingly, the uniformity of the thicknss of the coating layer 13 is improved, and the damage of the optical fiber caused by the contact with the inner wall of the die can be prevented.

Description

【発明の詳細な説明】 本発明は光フアイバ被覆方法の改良に関する。[Detailed description of the invention] The present invention relates to improvements in optical fiber coating methods.

一般的に紡糸直後の光ファイバはコーテイング槽内に通
されて１次被讃されるが、この際光ファイバがコーテイ
ング槽のダイス中心を通るようでないと被覆偏肉が起こ
り、また、光ファイバがダイス内周と接触して損傷され
ることにもなる。Generally, the optical fiber immediately after spinning is passed through a coating tank and subjected to primary coating, but at this time, if the optical fiber does not pass through the center of the die of the coating tank, uneven coating thickness may occur, and the optical fiber may It may also come into contact with the inner periphery of the die and be damaged.

これを解消する手段として、被覆時における光ファイバ
の位置検出値を操作系へフィードバックして紡糸装置と
コーテイング槽との相対位置を制御することが行なわれ
ているが、実際にはミクロンオーダーの制御が難しく、
高価な設備を要したわシに期待した結果が得られない。As a means of solving this problem, the relative position between the spinning device and the coating tank is controlled by feeding back the detected position of the optical fiber during coating to the operating system, but in reality this control is on the order of microns. is difficult,
It required expensive equipment and I was not able to get the results I expected.

本発明は上記問題点に対処すべく、ガスの流動性を利用
してこの種被覆時にお−ける光フアイバ位置を常に適正
な位置に保時できるようにしたもので、以下その具体的
方法を図示の実施例により説明する。In order to solve the above-mentioned problems, the present invention utilizes the fluidity of gas to maintain the position of the optical fiber at an appropriate position during this type of coating. This will be explained with reference to the illustrated embodiment.

図において、（１）は紡糸炉、（２）は光フアイバ用支
持装置（以下、単に支持装置ともいう）、（３）はダイ
ス（４）ヲ有する・−テイータｉでラシ、このうち紡糸
炉＋１１は上段、コーテイング槽（３）は下段に配置さ
れ、かつ、支持装装置（２）はコーテイング槽（３）の
前段（上位）に配置されている。In the figure, (1) is a spinning furnace, (2) is an optical fiber support device (hereinafter also simply referred to as a support device), and (3) is a die (4). +11 is arranged in the upper stage, the coating tank (3) is arranged in the lower stage, and the support device (2) is arranged in the previous stage (upper stage) of the coating tank (3).

上記における支持装置（２）は中空器体（５）と、該゛
中空器体（５）の両側部に連結されたガス供給系（６１
Ａ＜（６）Ｂと、該中空器体（５）の上部および下部に
設けられた支持°具（７１Ａ　％　（’ｎ　Ｂは何れも
上下方向ζこ貫通するガス吹串型の支持孔（８）　Ａ　
％　ｔｓ）Ｂを有している。The support device (2) in the above includes a hollow vessel (5) and a gas supply system (61) connected to both sides of the hollow vessel (5).
A < (6) B, and the support tools (71A %) provided at the upper and lower parts of the hollow vessel body (5) ('n B are gas blower type support holes ( 8) A
%ts)B.

しかも上記支持孔（８）　Ａ　％　（８１Ｂは、その断
面形状が任意の曲率による鼓形となっており、該各支持
孔（８）　Ａ　ｚ　（ｓｌ　Ｂの長手方向中間（長手方
向中央）は搾小径部＋９）　Ａ　、　（９）　Ｂ’□と
なっている。Moreover, the support hole (8) A % (81B has a cross-sectional shape of an hourglass with an arbitrary curvature, and the longitudinal middle (longitudinal center) of each support hole (8) A z (sl B) is The reduced diameter part is +9) A, (9) B'□.

そして前述した支持装置（２）とコーテイング槽（３）
との相対配置においそ支持孔（９）　Ａ　％　＋９１　
Ｂの軸心とダイス（４；の軸心メは互いに一致している
。And the above-mentioned support device (2) and coating tank (3)
Support hole (9) A % +91
The axial center of B and the axial center of the die (4;) coincide with each other.

本発明では上記において石英系光ファイバ、プラスチッ
ククラツド光ファイバ、多成分ガン、ス系光）・アイバ
などを紡糸し、さらに紡糸後の光ファイバをシリコーン
ゴム、エボキ′ジ樹脂、ウレタン樹脂、弗素樹脂等の被
覆材料で被覆す゛る。In the present invention, quartz-based optical fibers, plastic-clad optical fibers, multi-component guns, phosphor-based optical fibers, etc. are spun, and the spun optical fibers are further processed using silicone rubber, epoxy resin, urethane resin, fluorine resin, etc. Cover with a coating material such as resin.

つまりこの際の紡糸では、プリフォームロッド０１の下
端を紡糸炉（１）内へ低速で内挿すると共に同炉−（１
）内で加熱溶融された該ロッド下端を高速で引きとって
光ファイバαＤとし、以下この光ファイバＩを支持孔（
８）　Ａ　、中空器体（５）、支持孔（８）　Ｂ　、コ
ーテイング槽（３）とそのダイス（４）中へ順次通しな
がらコーテイング槽（３）′では“液状とした賦覆材料
ａ邊を光フてイバａυの外周に付着させ、かつ、ダイス
（４）により所定外径に成形して当該光ファイバａυの
外周に被覆層Ｑ１を形成するのである。In other words, in this spinning, the lower end of the preform rod 01 is inserted into the spinning furnace (1) at low speed, and the
) The lower end of the rod heated and melted in the support hole (
8) A, hollow container body (5), support hole (8) B, coating tank (3) and its die (4) are passed sequentially, and in coating tank (3)', "liquid covering material a side" is passed through the coating tank (3) and its die (4) is attached to the outer periphery of the optical fiber aυ, and is molded to a predetermined outer diameter using a die (4) to form a coating layer Q1 on the outer periphery of the optical fiber aυ.

本発明ではこうして光ファイバαυの外局に被覆層斡を
形成するとき、図示しないガスボンベ等に連結されてい
るガス供給系（６）Ａ、＋６）Ｂから中空器体（５」内
へ一定圧力のガスを供給し、さらに該中空器体（５）内
のガスを支持孔（８）　Ａ　、　＋８１　Ｂよシ同Ｍ（
５）外へ吹出させるのでアシ、これら支持孔１１３）　
Ａ　、　ｆ８１’Ｂ内にこのようなガス流動性が生じる
と、光ファイバｕのはその周方向から均等な流体圧を受
けて各支持孔＋８）　Ａ　、　（８）　Ｂの軸心位置で
安定するようになり、かつ、ダイス（４）の軸心線上に
保持されることとなる。In the present invention, when forming a coating layer on the outer part of the optical fiber αυ, a constant pressure is applied from the gas supply system (6)A, +6)B connected to a gas cylinder (not shown) into the hollow vessel body (5''). The gas in the hollow vessel body (5) is further supplied to the support holes (8) A, +81 B and the same M (
5) These support holes 113)
When such gas fluidity occurs in A and f81'B, the optical fiber U receives equal fluid pressure from the circumferential direction and becomes stable at the axial center position of each support hole +8) A and (8) B. and is held on the axis of the die (4).

したがって上記光フアイバ被覆時、その被覆層斡に偏肉
が生じるとか、光ファイノくαυがダイス（４）の内周
に接木するといったことが阻止され、高品質の１次被覆
光ファイノ々が得られる。Therefore, when coating the above-mentioned optical fiber, uneven thickness of the coating layer or grafting of the optical fiber αυ to the inner periphery of the die (4) can be prevented, and high quality primary coated optical fibers can be obtained. It will be done.

なお、上記のようにして支持孔＋８１Ａ、　＋８１Ｂ内
でガス流動性を生じさせるとき、゛これら支持孔＋８）
　Ａ　、　＋８１　Ｂの孔径は長手方向に均一なもので
あってもよいが、図示のごとき搾小径部（９）　Ａ１（
９）　Ｂがある場合では、該各支持孔（８）　Ａ　、１
８１　Ｂの端部（径大部ンから搾小径部（９）　Ａ　、
　（９）　Ｂ’へ向うガスの向流作用により、光ファイ
バａυの適正製置がよシ効果的に保持でき、かつ、その
径大な端部によシ光ファイバａυの導入、導出も容易と
なる。In addition, when creating gas fluidity in the support holes +81A and +81B as described above, ``These support holes +8''
The hole diameters of A, +81B may be uniform in the longitudinal direction, but the diameter of the narrowed diameter portion (9) A1 (
9) If B is present, each support hole (8) A, 1
81 End part of B (from large diameter part to small diameter part (9) A,
(9) Due to the countercurrent action of the gas toward B', the proper placement of the optical fiber aυ can be held more effectively, and the introduction and extraction of the optical fiber aυ is also easy due to its large diameter end. becomes.

また、上記支持孔（８）　Ａ　、　（８１Ｂを有する支
持具＋７１　Ａ　、　（７１Ｂは横割型（２つ割、３つ
割など）のものを合成して構成するのがよく、こうした
場合では、支持孔（８）　Ａ　ｓ　（８１Ｂの内面加工
が簡易に精度高く行なえる。In addition, it is preferable that the support hole (8) A, (support tool having 81B + 71A, (71B is a horizontally split type (split into two, split into three, etc.) are combined, and in such a case, Support hole (8) A s (Inner surface processing of 81B can be performed easily and with high precision.

また支持孔（８１Ａ　、　（８１Ｂの形成は太い内径の
パイプの中央部を引落すことによっても、所望の内径の
搾小径部（９１Ａ％　（９）Ｂ　を形成することができ
る。゛ 一方、本発明に用いるガスとしては、Ａｒ５ＨｅＳＮ２
などの不活性ガスや清浄な空気が主に用いられるが、こ
の際のガス温度は高温、常温、低温の何れであってもよ
く、そして常温１、低温などのガスを用′Ｇる場合では
紡糸後の光ファイバＯｎが冷却できるようにもなる。In addition, the support holes (81A, 81B) can also be formed by pulling down the center part of a pipe with a large inner diameter to form a reduced diameter part (91A% (9)B) with a desired inner diameter. The gas used in the invention is Ar5HeSN2
Inert gases and clean air, such as It also becomes possible to cool the optical fiber On after spinning.

゛　つぎに本発明の具体例を簡単に説明すると、前述し
た説明の範囲内において、各支持孔（８１Ａ　％（８）
Ｂの長さを２０Ｉ１１１１％同孔（８１Ａ　、　（８１
Ｂの端部内径を２ｍｓ搾小径部（９）　Ａ　、　（９）
　Ｂの内径を１５０ｆｉｍｓ同孔（８１Ａ　、　＋８）
　Ｂの内部曲率半径を１０簡とし、ガスの供給圧力（大
気圧との圧力差）を０．５　Ｋｇ／ｆｆｌ　とし、さら
に紡糸条件としては線速３０　ｍ／ｍ　、紡糸張力的７
　ｇｒ　　で外径°１２５μｍの光ファイバ０１１ｔ−
紡糸し、その後光７アイパａυの外周にはシリコボンゴ
ムによる被覆層ａ３を外径２００μｍで形成した。゛ Next, a specific example of the present invention will be briefly described. Within the scope of the above explanation, each support hole (81A% (8)
The length of B is 20I1111% the same hole (81A, (81
Reduce the inner diameter of the end of B by 2 ms (9) A, (9)
The inner diameter of B is 150fims the same hole (81A, +8)
The internal radius of curvature of B was set to 10, the gas supply pressure (pressure difference from atmospheric pressure) was set to 0.5 Kg/ffl, and the spinning conditions were a linear speed of 30 m/m and a spinning tension of 7.
Optical fiber 011t- with an outer diameter of 125 μm
After spinning, a coating layer a3 of silicone rubber was formed on the outer periphery of the Hikari 7 Eyepa aυ with an outer diameter of 200 μm.

こうして被覆された光ファイバａυは、下記の式に基く
被覆層ａ３の偏肉度が１０％以下に抑え・られており、
きわめて良好な結果を示した。In the optical fiber aυ coated in this way, the thickness deviation of the coating layer a3 is suppressed to 10% or less based on the following formula,
The results showed extremely good results.

以上説明した通り、本発明方法が特徴としている技術手
段によれば、光ファイバの被覆偏肉度を小さく抑えるこ
とができると共に光ファイバの外傷発生も阻止すること
ができ、また、高価な制御手段を必要としないので上記
高品質状態を満足させる光フアイバ被覆が経済的に実施
できる。As explained above, according to the technical means characterized by the method of the present invention, it is possible to suppress the unevenness of coating thickness of the optical fiber to a small level, and also to prevent the occurrence of damage to the optical fiber. Therefore, it is possible to economically coat an optical fiber that satisfies the above-mentioned high quality conditions.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明方法の１実施例を示した略示説明図である
。 ＋ｌ）・・・“・紡糸炉 （２）”””光フアイバ用支持装置 ＋３１”””コーテイング槽 （４）・・・・・ダイス ＋５１””・中空器体 （６）Ａ、　ｆｅ）　Ｂ　＠＠−−−ガス供給系（７１
Ａ　％　（７１Ｂ・・・・・支持具（８１Ａ　、　（８
１Ｂ・・・・・支持孔（９）　Ａ　ｓ　（９）　Ｂ・・
・・・押手径部ＱＩａ＊＊ａ・プリ７オームロツド αυ１１１１＠＠１１光フアイバ ａり・・・°・被覆材料 ａ３・・・・・被覆層 特許出願人 代理人　弁理士　　斎　藤　義　雄The drawings are schematic illustrations showing one embodiment of the method of the present invention. +l)..."・Spinning furnace (2)""""Optical fiber support device +31""""Coating tank (4)...Dice +51"""・Hollow vessel body (6) A, fe) B @@---Gas supply system (71
A % (71B...Support (81A, (8
1B...Support hole (9) A s (9) B...
・・・Press diameter part QIa**a・Pre-7 ohm rod αυ1111@@11 optical fiber a・°・Coating material a3・・・・Coating layer Patent applicant agent Patent attorney Yoshio Saifuji

Claims (3)

【特許請求の範囲】[Claims] （１）紡糸後の光ファイバをダイス付のコーテイング槽
内に通してその外周に所望の被覆層を形成する光ファイ
バの被覆方法において、上記コーテイング槽の前段には
〃ス吹出型の支持孔を有する光フアイバ用支持装置を配
置して同装置の支持孔軸心とコーテイング槽のダイス軸
心とを互いに一致させておき、上記支持装置の支持孔か
らコーテイング槽のダイスにわたって光ファイバを通し
なから該光フアイバ外周に被覆層を形成するとき、支持
孔内にガス流動性を生じ′させて光７アイパを支持する
ことを特徴とした光ファイバの被覆方法。(1) In an optical fiber coating method in which the optical fiber after spinning is passed through a coating tank equipped with a die to form a desired coating layer on its outer periphery, a support hole of a gas blowing type is provided at the front stage of the coating tank. The optical fiber support device is arranged so that the axis of the support hole of the device and the axis of the die of the coating bath are aligned with each other, and the optical fiber is not passed from the support hole of the support device to the die of the coating bath. A method for coating an optical fiber, characterized in that when a coating layer is formed on the outer periphery of the optical fiber, gas fluidity is generated within the support hole to support the optical fiber. （２）光フアイバ用支持装置として２つの支持孔を有す
Ｉるものを用いる特許請求の範囲第１項記載の光ファイ
バの被覆方法。(2) A method for coating an optical fiber according to claim 1, in which an optical fiber support device having two support holes is used. （３）支持孔としてその長手方向中間に搾小径部を有す
るものを採用する特許請求の範囲第１項または第２項記
載の光ファイバの被覆方法。(3) A method for coating an optical fiber according to claim 1 or 2, wherein the support hole has a reduced diameter portion in the middle of the support hole in the longitudinal direction.
JP56104262A 1981-07-03 1981-07-03 Coating of optical fiber Pending JPS589839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56104262A JPS589839A (en) 1981-07-03 1981-07-03 Coating of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56104262A JPS589839A (en) 1981-07-03 1981-07-03 Coating of optical fiber

Publications (1)

Publication Number Publication Date
JPS589839A true JPS589839A (en) 1983-01-20

Family

ID=14376008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56104262A Pending JPS589839A (en) 1981-07-03 1981-07-03 Coating of optical fiber

Country Status (1)

Country Link
JP (1) JPS589839A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2725783A1 (en) * 1994-10-17 1996-04-19 Alcatel Fibres Optiques METHOD FOR DETECTING THE ALIGNMENT AND CENTERING OF AT LEAST ONE DIE ALONG AND AROUND A WIRE TENSIONED BETWEEN TWO FIXED POINTS
CN1069443C (en) * 1993-11-09 2001-08-08 皇家菲利浦电子有限公司 Electric lamp
US6372117B1 (en) 1999-12-22 2002-04-16 Nippon Macdermid Co., Ltd. Bright tin-copper alloy electroplating solution
WO2011149816A1 (en) * 2010-05-27 2011-12-01 Corning Incorporated Method for producing optical fiber using linear non-contact fiber centering
CN106380070A (en) * 2016-08-29 2017-02-08 烽火通信科技股份有限公司 Optical fiber stabilization apparatus, optical fiber rotational drawing system and optical fiber drawing method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1069443C (en) * 1993-11-09 2001-08-08 皇家菲利浦电子有限公司 Electric lamp
FR2725783A1 (en) * 1994-10-17 1996-04-19 Alcatel Fibres Optiques METHOD FOR DETECTING THE ALIGNMENT AND CENTERING OF AT LEAST ONE DIE ALONG AND AROUND A WIRE TENSIONED BETWEEN TWO FIXED POINTS
EP0708309A1 (en) * 1994-10-17 1996-04-24 Alcatel Fibres Optiques Procedure for detecting the centering of at least one die around a wire stretched between two points
US6372117B1 (en) 1999-12-22 2002-04-16 Nippon Macdermid Co., Ltd. Bright tin-copper alloy electroplating solution
WO2011149816A1 (en) * 2010-05-27 2011-12-01 Corning Incorporated Method for producing optical fiber using linear non-contact fiber centering
CN102906041A (en) * 2010-05-27 2013-01-30 康宁股份有限公司 Method for producing optical fiber using linear non-contact fiber centering
US8973408B2 (en) 2010-05-27 2015-03-10 Corning Incorporated Method for producing optical fiber using linear non-contact fiber centering
CN106380070A (en) * 2016-08-29 2017-02-08 烽火通信科技股份有限公司 Optical fiber stabilization apparatus, optical fiber rotational drawing system and optical fiber drawing method

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