JPH05279067A - Stretching method and stretching device for optical fiber base material - Google Patents
Stretching method and stretching device for optical fiber base materialInfo
- Publication number
- JPH05279067A JPH05279067A JP4110893A JP11089392A JPH05279067A JP H05279067 A JPH05279067 A JP H05279067A JP 4110893 A JP4110893 A JP 4110893A JP 11089392 A JP11089392 A JP 11089392A JP H05279067 A JPH05279067 A JP H05279067A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber preform
- stretching
- fiber base
- 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
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
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02736—Means for supporting, rotating or feeding the tubes, rods, fibres or filaments to be drawn, e.g. fibre draw towers, preform alignment, butt-joining preforms or dummy parts during feeding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/30—Means for continuous drawing from a preform
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
【０００１】[0001]
【産業上の利用分野】本発明は、光ファイバ母材を大き
い径から小径に延伸するにおいて、複数の光ファイバ母
材を連続的に行うようにした光ファイバ母材の延伸方法
および延伸装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for stretching an optical fiber preform in which a plurality of optical fiber preforms are continuously drawn in stretching the optical fiber preform from a large diameter to a small diameter. It is a thing.
【０００２】[0002]
【従来の技術】従来、大径の光ファイバ母材を小径に延
伸するには、例えば図２のような延伸装置を用いて行っ
ている。この装置では、延伸対象の光ファイバ母材Ｍの
上下に上部および下部のダミーロッド（ガラス棒）１，
２を接続し、この光ファイバ母材Ｍを電気炉などの延伸
炉３に通すと共に、上記上部および下部のダミーロッド
（ガラス棒）１，２を、上部チャック４および下部チャ
ック５を介して、上部の送り出し機構６と下部の引き取
り機構７で把持し、これらの送り出し機構６と下部の引
き取り機構７をガイドレール８，８に沿って、下方に相
対移動させることにより、光ファイバ母材Ｍを小径に延
伸している。この際、引き取り機構７側のストロークが
足りない場合には、引き取り用のロールやベルトなど用
いて、連続的に引き取っている。2. Description of the Related Art Conventionally, for drawing a large-diameter optical fiber preform to a small diameter, for example, a drawing apparatus as shown in FIG. 2 is used. In this apparatus, upper and lower dummy rods (glass rods) 1 above and below the optical fiber preform M to be stretched are provided.
2, the optical fiber preform M is passed through a drawing furnace 3 such as an electric furnace, and the upper and lower dummy rods (glass rods) 1 and 2 are connected via an upper chuck 4 and a lower chuck 5. The optical fiber preform M is gripped by the upper feeding mechanism 6 and the lower pulling mechanism 7, and the feeding mechanism 6 and the lower pulling mechanism 7 are relatively moved downward along the guide rails 8 and 8. Stretched to a small diameter. At this time, when the stroke on the side of the take-up mechanism 7 is insufficient, the take-up roll or belt is used for continuous take-up.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記装置に
よる場合、延伸処理は、１本の光ファイバ母材Ｍを単位
として行うものであるため、母材１本毎に、段取り替え
や、延伸炉の昇温、加熱、さらには冷却などを行う必要
があり、必ずしも生産性がよいとは言えない面があっ
た。However, in the case of the above apparatus, since the drawing process is carried out in units of one optical fiber preform M, the preparatory change or the drawing furnace is performed for each preform. Since it is necessary to raise the temperature, heat, and further cool down, the productivity is not always good.
【０００４】本発明は、このような従来の実情に鑑みて
なされたもので、複数の光ファイバ母材の延伸を連続的
に行おうとするものである。The present invention has been made in view of such conventional circumstances, and is intended to continuously stretch a plurality of optical fiber preforms.
【０００５】[0005]
【課題を解決するための手段】かゝる本発明の一つは、
延伸炉の上部に溶着手段を設け、当該延伸炉で延伸中の
光ファイバ母材の上部に別の光ファイバ母材の下端を溶
着しながら順次延伸させることを特徴とする光ファイバ
母材の延伸方法にある。[Means for Solving the Problems] One of the present inventions is
Stretching of the optical fiber preform characterized in that a welding means is provided in the upper part of the stretching furnace, and the lower end of another optical fiber preform is welded to the upper part of the optical fiber preform being stretched in the drawing furnace while being sequentially stretched. On the way.
【０００６】本発明のもう一つは、上記延伸方法を実施
するためのもので、延伸炉と、該延伸炉の上部に設置さ
れ、当該延伸炉に挿入された延伸中の光ファイバ母材の
上部に別の光ファイバ母材の下端を溶着させる溶着手段
と、前記延伸炉と溶着手段との間にあって光ファイバ母
材を下方に送り出す第１の送り出し機構と、前記溶着手
段の上方にあって光ファイバ母材を下方に送り出す第２
の送り出し機構とからなることを特徴とする光ファイバ
母材の延伸装置にある。[0006] Another aspect of the present invention is to carry out the above-mentioned drawing method, which comprises a drawing furnace and an optical fiber preform which is installed in the drawing furnace and is inserted into the drawing furnace. A welding means for welding the lower end of another optical fiber preform to the upper portion, a first feeding mechanism for feeding the optical fiber preform downward between the drawing furnace and the welding means, and above the welding means. The second to send the optical fiber base material downward
And a feeding mechanism for the optical fiber preform.
【０００７】[0007]
【作用】上記構成からなる本発明方法および装置による
と、延伸中の光ファイバ母材の上部に次に延伸する別の
光ファイバ母材を順次接続させるものであるため、極め
て能率的に複数の光ファイバ母材を連続して延伸させる
ことができる。According to the method and apparatus of the present invention having the above-mentioned constitution, since another optical fiber preform to be drawn next is successively connected to the upper part of the optical fiber preform being drawn, a plurality of optical fiber preforms can be extremely efficiently used. The optical fiber preform can be continuously drawn.
【０００８】[0008]
【実施例】図１は、本発明に係る光ファイバ母材の延伸
装置の一実施例を示したもので、この延伸装置では、延
伸炉１３の上部に例えば電気炉からなる溶着手段２０を
設けると共に、この延伸炉１３の下部には引き取り機構
１７を設け、さらに、上記延伸炉１３と溶着手段２０と
の間には第１の送り出し機構１６を設け、かつ、上記溶
着手段２０の上方には第２の送り出し機構２６を設けて
ある。1 shows an embodiment of an optical fiber preform stretching apparatus according to the present invention. In this stretching apparatus, a welding means 20 such as an electric furnace is provided above a drawing furnace 13. At the same time, a take-up mechanism 17 is provided in the lower portion of the drawing furnace 13, a first feeding mechanism 16 is provided between the drawing furnace 13 and the welding means 20, and above the welding means 20. A second delivery mechanism 26 is provided.
【０００９】上記延伸炉１３は、例えば電気炉からな
り、内側の円筒状マッフル１３ａの内部に挿入された光
ファイバ母材Ｍ1 が、このマッフル１３ａの外周に設置
された電熱ヒータなどの発熱体１３ｂにより加熱するさ
れるようになっている。The drawing furnace 13 comprises, for example, an electric furnace, and the optical fiber preform M 1 inserted into the inner cylindrical muffle 13a has a heating element such as an electric heater installed on the outer periphery of the muffle 13a. It is designed to be heated by 13b.
【００１０】また、上記溶着手段２０の電気炉も、上記
と同様円筒状マッフル２０ａとこのマッフル２０ａの外
周に設置された電熱ヒータなどの発熱体２０ｂからな
る。そして、このマッフル２０ａ部分に、上記延伸炉１
３に挿入された光ファイバ母材Ｍ1 の上部に突き合わせ
た別の光ファイバ母材Ｍ2 の当該下端突き合わせ部分が
下降挿入されてきたとき、当該下端突き合わせ部分を発
熱体２０ｂにより加熱して溶着させるものである。The electric furnace of the welding means 20 is also composed of a cylindrical muffle 20a and a heating element 20b such as an electric heater installed on the outer periphery of the muffle 20a, as in the above. Then, the drawing furnace 1 is attached to the muffle 20a.
When the lower end abutting portion of another optical fiber preform M 2 abutted on the upper portion of the optical fiber preform M 1 inserted in 3 is downwardly inserted, the lower end abutting portion is heated by the heating element 20b and welded. It is what makes them.
【００１１】この溶着手段２０は、上記電気炉に限定さ
れず、例えば両母材Ｍ1 ，Ｍ2 の突き合わせ部分の周囲
に火炎バーナなどを配置し、酸水素火炎などの火炎をに
より加熱して溶着させる手段などであってもよい。The welding means 20 is not limited to the electric furnace described above. For example, a flame burner is arranged around the abutting portions of the base materials M 1 and M 2 to heat a flame such as an oxyhydrogen flame. It may be a means for welding.
【００１２】また、上記引き取り機構１７や、第１の送
り出し機構１６および第２の送り出し機構２６として
は、特に限定されないが、上述した図２の引き取り機構
７や送り出し機構６などと同様の機構とするとよい。も
ちろん、引き取り機構１７側のストロークが足りない場
合には、引き取り用のロールやベルトなど用いて、連続
的に引き取るようにする。The take-up mechanism 17, the first delivery mechanism 16 and the second delivery mechanism 26 are not particularly limited, but are similar to the take-out mechanism 7 and the delivery mechanism 6 shown in FIG. Good to do. Of course, when the stroke on the side of the take-up mechanism 17 is insufficient, the take-up roll or belt is used so that the take-up mechanism 17 can continuously take it.
【００１３】このような延伸装置を用いて、本発明に係
る延伸方法を実施するには、次のようにして行う。先
ず、最初に１本目の光ファイバ母材Ｍ1 を延伸炉１３中
に挿入させると共に第１の送り出し機構１６により把持
する。この際、母材Ｍ1 の下端にあっては、予め口出し
加工を行い、必要により、引取り用の下部ダミーロッド
を接続しておく。To carry out the stretching method according to the present invention by using such a stretching device, the following is carried out. First, first, the first optical fiber preform M 1 is inserted into the drawing furnace 13 and held by the first delivery mechanism 16. At this time, the lower end of the base material M 1 is preliminarily processed so that a lower dummy rod for take-up is connected as necessary.
【００１４】この状態から、引き取り機構１７および第
１の送り出し機構１６を相対的に下降させて、光ファイ
バ母材Ｍ1 の延伸を行い、この光ファイバ母材Ｍ1 の上
端が溶着手段２０部分に達したら、第２の送り出し機構
２６により次に延伸する別の２本目の光ファイバ母材Ｍ
2 を把持すると共に、その下端を光ファイバ母材Ｍ1の
上端に突き合わせ、この状態で、溶着手段２０の発熱体
２０ｂにより加熱して溶着させる。[0014] From this state, the take-off mechanism 17 and the first feed mechanism 16 by relatively lowered, performs drawing of the optical fiber preform M 1, the upper end is welded section 20 portion of the optical fiber preform M 1 When it reaches, the second second optical fiber preform M is drawn by the second feeding mechanism 26.
2 is gripped, the lower end thereof is butted against the upper end of the optical fiber preform M 1 , and in this state, the heating element 20b of the welding means 20 heats and welds.
【００１５】この後、ある一定時間延伸を続けたら、第
１の送り出し機構１６による光ファイバ母材Ｍ1 の把持
を開放する一方、第２の送り出し機構２６による光ファ
イバ母材Ｍ2 の把持と下降を通じて引続き延伸を続け
る。そして、第２の送り出し機構２６が溶着手段２０の
上部に達したら、第１の送り出し機構１６によって光フ
ァイバ母材Ｍ2 を把持し、第２の送り出し機構２６によ
る把持を開放して、引続き延伸を続ける。After that, when the drawing is continued for a certain period of time, the holding of the optical fiber preform M 1 by the first feeding mechanism 16 is released, while the holding of the optical fiber preform M 2 by the second feeding mechanism 26 is performed. Continue to stretch through the descent. Then, when the second feeding mechanism 26 reaches the upper part of the welding means 20, the first feeding mechanism 16 holds the optical fiber preform M 2 , and the second feeding mechanism 26 releases the holding to continue the stretching. Continue.
【００１６】この後は、光ファイバ母材Ｍ2 の上部に、
さらに別の光ファイバ母材を溶着するというように順次
同様の手順を繰り返すことにより、任意の複数の光ファ
イバ母材を連続して延伸することができる。After this, on the upper part of the optical fiber preform M 2 ,
By repeating the same procedure in sequence, such as welding another optical fiber preform, it is possible to continuously draw a plurality of arbitrary optical fiber preforms.
【００１７】なお、延伸中の光ファイバ母材の上部に溶
着される別の光ファイバ母材の供給と当該溶着は、自動
供給手段の設置や第２の送り出し機構２６のコントロー
ルにより、自動化するとよい。これにより、より優れた
生産性が得られる。It should be noted that the supply of another optical fiber base material to be welded to the upper portion of the optical fiber base material being drawn and the welding thereof may be automated by installing automatic supply means or controlling the second delivery mechanism 26. .. Thereby, more excellent productivity can be obtained.
【００１８】[0018]
【発明の効果】このように本発明に係る光ファイバ母材
の延伸方法および延伸装置によれば、光ファイバ母材を
大きい径から小径に延伸するにおいて、複数の光ファイ
バ母材を連続的に行うことができるため、従来の光ファ
イバ母材１本毎に、段取り替えや、延伸炉の昇温、加
熱、さらには冷却などを行う必要のある方法などに比較
して、極めて高い生産性が得られる。As described above, according to the optical fiber preform drawing method and the drawing apparatus of the present invention, when the optical fiber preform is drawn from a large diameter to a small diameter, a plurality of optical fiber preforms are continuously formed. Since it can be carried out, the productivity is extremely high as compared with the conventional method in which it is necessary to perform setup, temperature raising, heating, and cooling of the drawing furnace for each optical fiber preform. can get.
【図１】本発明に係る光ファイバ母材の延伸装置の一実
施例を示した概略説明図である。FIG. 1 is a schematic explanatory view showing an embodiment of an optical fiber preform stretching device according to the present invention.
【図２】従来の光ファイバ母材の延伸装置の一例を示し
た概略斜視図である。FIG. 2 is a schematic perspective view showing an example of a conventional optical fiber preform stretching device.
Ｍ1 〜Ｍ2 光ファイバ母材、 １３ 延伸炉、 １６ 第１の送り出し機構、 １７ 引き取り機構、 ２０ 溶着手段、 ２６ 第２の送り出し機構、M 1 to M 2 optical fiber preform, 13 drawing furnace, 16 first feeding mechanism, 17 take-up mechanism, 20 welding means, 26 second feeding mechanism,
Claims (2)
伸炉で延伸中の光ファイバ母材の上部に別の光ファイバ
母材の下端を溶着しながら順次延伸させることを特徴と
する光ファイバ母材の延伸方法。1. An optical fiber characterized in that a welding means is provided on an upper part of a drawing furnace, and a lower end of another optical fiber base material is welded to an upper part of an optical fiber base material which is being drawn in the drawing furnace, and is sequentially drawn. Fiber preform drawing method.
当該延伸炉に挿入された延伸中の光ファイバ母材の上部
に別の光ファイバ母材の下端を溶着させる溶着手段と、
前記延伸炉と溶着手段との間にあって光ファイバ母材を
下方に送り出す第１の送り出し機構と、前記溶着手段の
上方にあって光ファイバ母材を下方に送り出す第２の送
り出し機構とからなることを特徴とする光ファイバ母材
の延伸装置。2. A drawing furnace and a drawing furnace installed above the drawing furnace.
Welding means for welding the lower end of another optical fiber preform to the upper part of the optical fiber preform which is being inserted into the drawing furnace,
It is composed of a first feeding mechanism which is located between the drawing furnace and the welding means and which feeds the optical fiber preform downward, and a second feeding mechanism which is above the welding means and which feeds the optical fiber preform downward. An optical fiber preform stretching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4110893A JPH05279067A (en) | 1992-04-03 | 1992-04-03 | Stretching method and stretching device for optical fiber base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4110893A JPH05279067A (en) | 1992-04-03 | 1992-04-03 | Stretching method and stretching device for optical fiber base material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05279067A true JPH05279067A (en) | 1993-10-26 |
Family
ID=14547362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4110893A Pending JPH05279067A (en) | 1992-04-03 | 1992-04-03 | Stretching method and stretching device for optical fiber base material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05279067A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5922098A (en) * | 1995-03-24 | 1999-07-13 | Sumitomo Electric Industries, Ltd. | Cleaning a glass preform with a high temperature inert gas during the drawing of an optical fiber |
| FR2773795A1 (en) * | 1998-01-22 | 1999-07-23 | Alsthom Cge Alcatel | SEMI-CONTINUOUS FIBRATION PROCESS OF PREFORMS HAVING A PREHEATING STAGE |
| JP2007039260A (en) * | 2005-08-01 | 2007-02-15 | Canon Inc | Method for manufacturing drawn glass member, method for manufacturing spacer, and method for manufacturing image display device |
| JP2009242190A (en) * | 2008-03-31 | 2009-10-22 | Furukawa Electric Co Ltd:The | Thin plate glass production method and thin plate glass production device |
| JP2010248033A (en) * | 2009-04-16 | 2010-11-04 | Sumitomo Electric Ind Ltd | Method for drawing glass preform for optical fiber |
| JP2013100231A (en) * | 2013-02-25 | 2013-05-23 | Furukawa Electric Co Ltd:The | Method and apparatus for producing thin plate glass |
| CN110217975A (en) * | 2019-06-28 | 2019-09-10 | 成都光明光电股份有限公司 | The drawing method and device of optical glass bar |
-
1992
- 1992-04-03 JP JP4110893A patent/JPH05279067A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5922098A (en) * | 1995-03-24 | 1999-07-13 | Sumitomo Electric Industries, Ltd. | Cleaning a glass preform with a high temperature inert gas during the drawing of an optical fiber |
| FR2773795A1 (en) * | 1998-01-22 | 1999-07-23 | Alsthom Cge Alcatel | SEMI-CONTINUOUS FIBRATION PROCESS OF PREFORMS HAVING A PREHEATING STAGE |
| EP0931770A1 (en) * | 1998-01-22 | 1999-07-28 | Alcatel | Process for semi-continuous drawing of optical fibre preforms comprising a pre-heating step |
| JP2007039260A (en) * | 2005-08-01 | 2007-02-15 | Canon Inc | Method for manufacturing drawn glass member, method for manufacturing spacer, and method for manufacturing image display device |
| US8082759B2 (en) | 2005-08-01 | 2011-12-27 | Canon Kabushiki Kaisha | Producing method for drawn glass member, producing method for spacer, and producing method for image display apparatus |
| JP2009242190A (en) * | 2008-03-31 | 2009-10-22 | Furukawa Electric Co Ltd:The | Thin plate glass production method and thin plate glass production device |
| JP2010248033A (en) * | 2009-04-16 | 2010-11-04 | Sumitomo Electric Ind Ltd | Method for drawing glass preform for optical fiber |
| JP2013100231A (en) * | 2013-02-25 | 2013-05-23 | Furukawa Electric Co Ltd:The | Method and apparatus for producing thin plate glass |
| CN110217975A (en) * | 2019-06-28 | 2019-09-10 | 成都光明光电股份有限公司 | The drawing method and device of optical glass bar |
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