JPH0283233A - Production of optical fiber - Google Patents
Production of optical fiberInfo
- Publication number
- JPH0283233A JPH0283233A JP23491888A JP23491888A JPH0283233A JP H0283233 A JPH0283233 A JP H0283233A JP 23491888 A JP23491888 A JP 23491888A JP 23491888 A JP23491888 A JP 23491888A JP H0283233 A JPH0283233 A JP H0283233A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- optical fiber
- wire drawing
- weight
- base material
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000005491 wire drawing Methods 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/0253—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/40—Monitoring or regulating the draw tension or draw rate
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/72—Controlling or measuring the draw furnace temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光フィアバの製造方法、特に光フィアバ母材を
線引して光ファイバ化する際の張力の一定化に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing an optical fiber, and in particular, to a method for making the tension constant when drawing an optical fiber base material to form an optical fiber.
［従来の技術］
ＳｔＯ，を主成分としたいわゆる石英ガラスからなる光
ファイバは、ＶＡＤ法などで製造した光ファイバ母材（
外径一定の棒状のもの）を、約２０００℃にカーボンヒ
ータ等により加熱されたカーボン炉芯管内で、Ａｒ、Ｈ
ｅなとの希ガスもしくはＮ２などの雰囲気下で加熱しつ
つ引取ることにより、外径的１２５μｌの光ファイバと
なる。[Prior Art] Optical fibers made of so-called silica glass containing StO as a main component are optical fiber base materials (
A rod-shaped object with a constant outer diameter) is heated with Ar, H, and
An optical fiber having an outer diameter of 125 μl is obtained by heating it in an atmosphere of a rare gas such as E or N2.
この線引き工程において、光ファイバ母材が一定速度で
送り込まれ外径が一定になるよう、取引き速度を調整す
る。また光ファイバが断線しないように十分に加熱軟化
させ、表面が荒れたり断線したりしないよう、またガラ
ス構造に起因する散乱損失を生じないように、１０〜６
０ｇの張力範囲で線引きする必要がある。In this drawing process, the trading speed is adjusted so that the optical fiber preform is fed at a constant speed and has a constant outer diameter. In addition, to prevent the optical fiber from breaking, heat it sufficiently to soften it, to prevent the surface from becoming rough or to break, and to prevent scattering loss due to the glass structure.
It is necessary to draw the line in the 0g tension range.
ところで、このときの張力は、予め温度を調整して光フ
ァイバを引出し、バネばかり等により張力を測定し、所
定の張力となった時に相当すると仮定して作業が進めら
れる。By the way, the work is carried out on the assumption that the tension at this time corresponds to when the temperature is adjusted in advance, the optical fiber is pulled out, the tension is measured using a spring balance, etc., and a predetermined tension is reached.
また、連続的にファイバにローラーを接続させ、その変
位量から張力を知る方法もあるが、光ファイバの場合、
コーティング前の素線に物が接触すると必ず断線に結び
つき、使用できない。Another method is to connect a roller to the fiber continuously and determine the tension from the amount of displacement, but in the case of optical fiber,
If anything comes into contact with the uncoated wire, it will always break and become unusable.
［発明が解決しようとする課８］
従来の方法では、予め調整した張力に相当する条件で線
引きしているだけであり、線引き時の張力は正確には不
明である。このため、カーボンヒータの劣化および光フ
ァイバ母材の寸法の違い、炉芯管内の圧力変動等により
張力が変わっても、その値を検出し調整することが不可
能であり、線引き張力が大きくなったり或いは小さくな
ったりして、光ファイバの断線および伝送損失の増加を
引起こす。[Problem 8 to be Solved by the Invention] In the conventional method, the wire is drawn only under conditions corresponding to a pre-adjusted tension, and the tension at the time of wire drawing is not precisely known. Therefore, even if the tension changes due to deterioration of the carbon heater, differences in the dimensions of the optical fiber base material, pressure fluctuations in the furnace core tube, etc., it is impossible to detect and adjust the value, and the drawing tension increases. or become smaller, causing breakage of the optical fiber and an increase in transmission loss.
そのため、張力を線引き時にも検出し、更に所定の値で
張力が一定になるよう調整する必要がある。Therefore, it is necessary to detect the tension also during drawing, and further adjust the tension so that it is constant at a predetermined value.
本発明の目的は前記従来技術の欠点を解消し、光ファイ
バ母材の線引き時に、連続的に張力を検出しかつ制御で
きる線引装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art and provide a drawing device that can continuously detect and control tension during drawing of an optical fiber preform.
［課題を解決するための手段］
本発明の光ファイバの製造方法は、石英ガラスからなる
光ファイバ母材を加熱装置により加熱軟化させ引取るこ
とにより光ファイバを得るに当り、光ファイバ母材を支
持金具を介して重量計に吊し、光ファイバ母材、支持金
具および線引き時の張力の総重量を計測し、該総重量か
ら支持金具と線引き時に一定割合で減少する光ファイバ
母材の重量を差し引いて張力を算出し、該張力を上記加
熱装置にフィードバックし、一定な張力となるよう線引
き温度の制御を行うものである。[Means for Solving the Problems] The method for manufacturing an optical fiber of the present invention is to obtain an optical fiber by heating and softening an optical fiber preform made of quartz glass with a heating device and taking it. The total weight of the optical fiber base material, the support bracket, and the tension during drawing is measured by hanging it on a weight scale via the support bracket, and from the total weight, the weight of the support bracket and the optical fiber base material, which decreases at a certain rate during drawing, is determined. The tension is calculated by subtracting the tension, the tension is fed back to the heating device, and the drawing temperature is controlled to maintain a constant tension.
［作用コ
重量計で計測される重量は、重量計に吊るされている光
ファイバ母材及び光ファイバ母材支持金具の重量と線引
き時にかかる張力との総和である。[Operation] The weight measured by the weighing scale is the sum of the weight of the optical fiber preform and the optical fiber preform supporting metal fitting suspended on the weighing scale and the tension applied during drawing.
従って、この総重量から、光ファイバ母材支持金具のｆ
ｆ１ＪＬと、一定の割合で変化する光ファイバの母材の
重量とを差引くことにより、張力が求められる。この張
力をカ−ボヒータ等の加熱装置にフィードバックすると
、カーボンヒータの劣化や光ファイバ母材の寸法の違い
、炉芯管内の圧力変動等により張力が変わっても、その
変化を補償して一定な張力になるような温度制御がなさ
れることになる。Therefore, from this total weight, f
The tension is determined by subtracting f1JL and the weight of the optical fiber base material, which changes at a constant rate. If this tension is fed back to a heating device such as a carbon heater, even if the tension changes due to deterioration of the carbon heater, differences in the dimensions of the optical fiber base material, pressure fluctuations in the furnace core tube, etc., the changes will be compensated for and the tension will remain constant. Temperature control will be performed to maintain tension.
［実施例］
本発明の具体的な実施例を図を引用しながら詳細に説明
する。[Example] Specific examples of the present invention will be described in detail with reference to the drawings.
第１図に示すように、光ファイバ母材３は光ファイバ母
材支持金具２に固定され、更にこれらのものが電気式重
量計１に吊下げられている。この電気式重量計１は、歪
もしくはバネの変位量を電気信号に変換できるもので、
フルスゲール５ｋｇ梢度１ｇ、を気信号出力０〜５ｖで
ある。これからの電気信号、即ち線引きによって経時変
化する光ファイバ母材３、支持金具２、張力の総重量が
、マイコン７に入力される。As shown in FIG. 1, the optical fiber preform 3 is fixed to an optical fiber preform support metal fitting 2, and these are further suspended from an electric weighing scale 1. This electric weighing scale 1 is capable of converting strain or spring displacement into an electrical signal.
Fullsgale 5kg weight 1g, air signal output 0-5V. A future electric signal, that is, the total weight of the optical fiber base material 3, support metal fitting 2, and tension, which changes over time due to wire drawing, is input to the microcomputer 7.
マイコン７は、電気式重量計１の信号に対し、光ファイ
バ母材３の外径、送り速度から算出できる光ファイバ母
材３の重量の経時変化を、プログラムセット出来るよう
になっている。そして、張力Ｏｇの時にリセットスイッ
チを入れると、張力表示がＯｇとなるようにしてあり、
線引き時には、（光ファイバ母材干支持金具＋張力）
−（光ファイバ母材干支持金具）＝張力の演算を行い、
張力のみを表示できる。更に、マイコンブから、張力の
測定値と目標値の差分を電気炉４の電気炉温度制御装置
８に入力させ、カーボンヒータ５の電流・電圧を変え、
温度を調整できるようにしである。張力１ｇに対する温
度変化量は３ ｄｅｇとしである。The microcomputer 7 is capable of programming a change in weight of the optical fiber preform 3 over time, which can be calculated from the outer diameter of the optical fiber preform 3 and the feed speed, in response to the signal from the electric weighing scale 1. When the reset switch is turned on when the tension is Og, the tension display will be Og.
When drawing, calculate (optical fiber base material support bracket + tension) - (optical fiber base material support bracket) = tension,
Only tension can be displayed. Furthermore, the difference between the measured tension value and the target value is input from the microcontroller to the electric furnace temperature control device 8 of the electric furnace 4, and the current and voltage of the carbon heater 5 are changed.
This allows you to adjust the temperature. The amount of temperature change with respect to 1 g of tension is 3 degrees.
このような装置において、まず外径φ３５１ｎ、長さ９
００１１１１の光ファイバ母材３を同径の長さ３００１
ｎＩｍの石英棒に接続し、支持金具２に固定したにのと
きの総重量は支持金具２も含め４５９７ ｇであった。In such a device, first, the outer diameter is φ351n and the length is 9
001111 optical fiber preform 3 with the same diameter length 3001
When connected to the nIm quartz rod and fixed to the support metal fitting 2, the total weight including the support metal fitting 2 was 4597 g.
このものを電気炉４に挿入し加熱軟化させた後、手動に
より光ファイバ６を引出し、はぼ外径が１２５μｍ近く
なったとき一瞬引取りを停止し、マイコン７のリセット
スイッチを入れ張力Ｏｇとする。After inserting this into the electric furnace 4 and heating and softening it, pull out the optical fiber 6 manually, and when the outer diameter of the fiber approaches 125 μm, stop pulling for a moment, turn on the reset switch of the microcomputer 7, and set the tension to Og. do.
次に、マイコン７の光ファイバ母材送り速度に対する重
量変化分の予めセットされたプログラムをスタートさせ
る。そして、再度光ファイバ６を引取り、自動的に線引
きされるように各装置をセットし、線引き作業をスター
トしな。Next, the microcomputer 7 starts a preset program for the weight change with respect to the optical fiber preform feed speed. Then, take over the optical fiber 6 again, set each device so that it will be drawn automatically, and start the drawing work.
以後、線引き速度１５０ｍ／ＩＮｉ ｎで５時間にわた
り約６０ｋｍの光ファイバを線引きした。その時の張力
変化は１５ｇ±１ｇで、温度の変化は２０５０℃±１℃
であった。Thereafter, approximately 60 km of optical fiber was drawn at a drawing speed of 150 m/INin for 5 hours. At that time, the tension change was 15g±1g, and the temperature change was 2050℃±1℃.
Met.
同じような光ファイバ母材３を何本線引きしても、その
張力の変動範囲は同様であった。No matter how many similar optical fiber preforms 3 were drawn, the variation range of the tension was the same.
［発明の効果コ
以上のように本発明によれば、線引き中の張力変動を監
視してそれを補償できるので、−本のロッド内で内圧の
変化、カーボンヒータの変化が生じたとしても、また−
本毎に光ファイバ母材寸法が違っていても、一定張力で
線引きすることができる。これにより、長手方向にかつ
光ファイバ母材毎に均質な強度、伝送、損失をもつもの
が得られ、良品となる歩留も向上する。[Effects of the Invention] As described above, according to the present invention, tension fluctuations during wire drawing can be monitored and compensated for, so even if changes in internal pressure or changes in the carbon heater occur within the rod, Also-
Even if the dimensions of the optical fiber base material differ from book to book, it can be drawn with a constant tension. As a result, optical fibers having uniform strength, transmission, and loss in the longitudinal direction and for each optical fiber base material can be obtained, and the yield of good products can be improved.
第１図は本発明の方法に従い張力計を使用して線引時に
連続的に張力を監視制御している状況を示した概略図で
ある。
図中、１は電気式重量計、２は支持金具、３は光ファイ
バ母材、４は電気炉、５はカーボンヒータ、６は光ファ
イバ、７はマイコン、８は電気炉温度制御装置を示す。FIG. 1 is a schematic diagram showing a situation in which tension is continuously monitored and controlled during wire drawing using a tension meter according to the method of the present invention. In the figure, 1 is an electric weighing scale, 2 is a support fitting, 3 is an optical fiber base material, 4 is an electric furnace, 5 is a carbon heater, 6 is an optical fiber, 7 is a microcomputer, and 8 is an electric furnace temperature control device. .
Claims (1)
り加熱軟化させ引取ることにより光ファイバを得るに当
り、光ファイバ母材を支持金具を介して重量計に吊し、
光ファイバ母材、支持金具および線引き時の張力の総重
量を計測し、該総重量から支持金具と線引き時に一定割
合で減少する光ファイバ母材の重量を差し引いて張力を
算出し、該張力を上記加熱装置にフィードバックし、一
定な張力となるよう線引き温度の制御を行うことを特徴
とする光ファイバの製造方法。1. When obtaining an optical fiber by heating and softening an optical fiber base material made of quartz glass with a heating device and taking it off, the optical fiber base material is suspended on a weight scale via a support fitting,
Measure the total weight of the optical fiber base material, the support metal fittings, and the tension during drawing, and calculate the tension by subtracting the weight of the support metal fittings and the optical fiber base material, which decreases at a certain rate during drawing, from the total weight. A method for manufacturing an optical fiber, characterized in that the drawing temperature is controlled so as to provide a constant tension by feeding back to the heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23491888A JPH0283233A (en) | 1988-09-21 | 1988-09-21 | Production of optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23491888A JPH0283233A (en) | 1988-09-21 | 1988-09-21 | Production of optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0283233A true JPH0283233A (en) | 1990-03-23 |
Family
ID=16978325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23491888A Pending JPH0283233A (en) | 1988-09-21 | 1988-09-21 | Production of optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0283233A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229854A (en) * | 1991-12-23 | 1994-08-19 | American Teleph & Telegr Co <Att> | Measuring method of tension of moving optical fiber |
| CN105906197A (en) * | 2016-06-16 | 2016-08-31 | 江苏亨通光纤科技有限公司 | Device and method for monitoring drawing residual length of optical fiber perform |
-
1988
- 1988-09-21 JP JP23491888A patent/JPH0283233A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06229854A (en) * | 1991-12-23 | 1994-08-19 | American Teleph & Telegr Co <Att> | Measuring method of tension of moving optical fiber |
| CN105906197A (en) * | 2016-06-16 | 2016-08-31 | 江苏亨通光纤科技有限公司 | Device and method for monitoring drawing residual length of optical fiber perform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0283233A (en) | Production of optical fiber | |
| US5968221A (en) | Method of controlling the diameter of a fiber preform including forming a gob on the end and pulling the gob | |
| US4608071A (en) | Method for reducing diameter of a glass rod or tube by drawing | |
| JP2002293564A (en) | Method for drawing optical fiber preform and drawing device | |
| JPS63100033A (en) | Production of optical fiber base material | |
| EP1211228A1 (en) | Optical fiber drawing method and drawing device | |
| EP2415720B1 (en) | Method for drawing grin lens fiber | |
| CN1931757B (en) | Optical fiber drawing process and control new method | |
| JPS5738331A (en) | Manufacture of base material for multicore fiber | |
| JPH0794331B2 (en) | Quartz tube or quartz rod manufacturing method | |
| JPH08217481A (en) | Production of optical fiber and drawing apparatus | |
| JP2583321B2 (en) | Method for measuring stretch melt viscosity of optical fiber preform | |
| JP3833003B2 (en) | Glass base material stretching method | |
| JPH04325428A (en) | Production of optical fiber preform | |
| JPS60112638A (en) | Manufacture of optical fiber | |
| JP3151367B2 (en) | Manufacturing method of optical fiber preform | |
| JPS569231A (en) | Manufacture of glass rod or pipe | |
| JP2004175663A (en) | Optical fiber and its fabrication method | |
| JPH0337129A (en) | Production of optical glass fiber | |
| Devekey et al. | A simple glass-fibre drawing apparatus | |
| JP2023102029A (en) | Method for manufacturing optical fiber | |
| CN2568651Y (en) | Device for controlling airflow stabilizing of optical fiber legging procedue | |
| JP2001220167A (en) | Method for manufacturing optical fiber | |
| JP2005047754A (en) | Method and apparatus for manufacturing optical fiber | |
| KR830001820B1 (en) | Method of manufacturing optical fiber |