JPH04305033A - Production of glass preform - Google Patents
Production of glass preformInfo
- Publication number
- JPH04305033A JPH04305033A JP6999891A JP6999891A JPH04305033A JP H04305033 A JPH04305033 A JP H04305033A JP 6999891 A JP6999891 A JP 6999891A JP 6999891 A JP6999891 A JP 6999891A JP H04305033 A JPH04305033 A JP H04305033A
- Authority
- JP
- Japan
- Prior art keywords
- burners
- soot
- base material
- traverse axis
- glass
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000004071 soot Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000007858 starting material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims 2
- 239000002023 wood Substances 0.000 claims 1
- 238000000151 deposition Methods 0.000 description 8
- 230000008021 deposition Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 229910003910 SiCl4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/50—Multiple burner arrangements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General 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等のガラス母
材を安定に効率よく製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stably and efficiently manufacturing a glass base material such as an optical fiber.
【０００２】0002
【従来の技術】気体のガラス原料をバーナから噴出し、
これを火炎中で反応させてガラス微粒子（以下、ここで
は「スート」という。）として軸方向にトラバースする
出発材の周囲に堆積させてスート堆積体を形成するいわ
ゆるＶＡＤ法は特公昭５４−３５２１号公報に記載され
ている。[Prior art] A gaseous glass raw material is ejected from a burner,
The so-called VAD method, in which glass particles (hereinafter referred to as "soot") are reacted in a flame and deposited around a starting material traversing in the axial direction to form a soot deposit, was developed in Japanese Patent Publication No. 54-3521. It is stated in the No.
【０００３】通常、このＶＡＤ法においては火炎中で反
応し生成したスートのうち母材に付着しなかったもの及
び反応生成物であるＨＣｌ、Ｈ２Ｏ等のガスを効率的に
排気するため、バーナと対向する位置に排気口を設ける
構成がとられており、このためバーナが１本あるいは複
数本のいずれかの場合もバーナの中心軸はトラバース軸
と排気口の中心を含む平面かこれに近い位置に配設する
のが一般的であった。[0003] Normally, in this VAD method, in order to efficiently exhaust the soot generated by the reaction in the flame that did not adhere to the base material and the gases such as HCl and H2O that are reaction products, a burner is used. The structure is such that the exhaust ports are located at opposing positions, so whether there is one burner or multiple burners, the central axis of the burner is located at or near a plane that includes the traverse axis and the center of the exhaust port. It was common to place them in
【０００４】0004
【発明が解決しようとする課題】近年、前記ＶＡＤ法に
おいてスートの堆積速度（単位時間当たりのスートの合
成速度：ｇ／分）を向上させる目的で複数本のバーナを
使用することが試みられたが、スート堆積体が割れると
いう新たな問題が生じた。[Problem to be Solved by the Invention] In recent years, attempts have been made to use multiple burners in the VAD method in order to improve the soot deposition rate (synthesis rate of soot per unit time: g/min). However, a new problem arose: the soot deposits were cracked.
【０００５】[0005]
【課題を解決するための手段】図１は上記の課題を解決
するためのガラス母材の製法、特にスートを堆積すると
きのバーナの配置に関する図である。本発明は気体のガ
ラス原料を複数本のバーナ１０，１１から噴出させ火炎
４０中で反応して生成するスートを回転しながらトラバ
ースする出発材５０の周囲に堆積し２０これを加熱透明
化してガラス母材を製造する方法において、トラバース
軸方向に隣接するバーナ１０，１１の中心軸がトラバー
ス軸を含む同一の平面内のトラバース軸に対して同じ面
内に存在しないように該バーナを配置し、かつ母材が一
回転する間にトラバース軸方向に隣接するバーナから噴
出する火炎３０によりその間の母材の表面を隙間なく加
熱することを特徴とするガラス母材の製造方法である。[Means for Solving the Problems] Fig. 1 is a diagram relating to a method for manufacturing a glass base material to solve the above-mentioned problems, and in particular to the arrangement of burners when depositing soot. In the present invention, a gaseous glass raw material is ejected from a plurality of burners 10, 11, reacts in a flame 40, and deposits the generated soot around a starting material 50 that traverses while rotating. In the method for manufacturing a base material, the burners 10 and 11 adjacent in the traverse axis direction are arranged so that their central axes are not in the same plane with respect to the traverse axis in the same plane containing the traverse axis, This method of manufacturing a glass base material is characterized in that while the base material rotates once, the surface of the base material between them is heated without any gaps by flames 30 ejected from burners adjacent in the traverse axis direction.
【０００６】ここで、トラバース軸方向に隣接するバー
ナの中心軸がトラバース軸を含む同一の平面内のトラバ
ース軸に対して反対側に存在するように、バーナを配置
する場合が好ましい。Here, it is preferable to arrange the burners so that the central axes of burners adjacent in the traverse axis direction are located on opposite sides of the traverse axis within the same plane containing the traverse axis.
【０００７】又、出発材が光ファイバ母材を構成するコ
ア、コアとクラッド又はコアとクラッド及びジャケット
の一部からなるガラス心体として光ファイバ用母材の製
造に適用できる。Furthermore, the starting material can be applied to the production of an optical fiber preform as a glass core consisting of a core, a core and a cladding, or a part of a core, cladding, and jacket that constitute an optical fiber preform.
【０００８】[0008]
【作用】複数本のバーナを使用して大型スート堆積体を
合成する場合、スートの密度差によるひびあるいは割れ
の発生を防止する方法として、バーナの間隔を火炎が干
渉する程度まで接近して合成することが特開昭５６−１
０９８３４号公報に記載されている。[Operation] When synthesizing a large soot deposit using multiple burners, as a way to prevent the occurrence of cracks or fractures due to differences in soot density, the burners should be spaced close together to the extent that their flames interfere. To do so is JP-A-56-1
It is described in the No. 09834 publication.
【０００９】しかし、図２に示す如く２本のバーナ１２
，１３の火炎４０が干渉する部分ではスート流３０なら
びに火炎４０が乱れ、スート堆積体の表面２４の部分で
はこれらの流れが浮き上がり、堆積速度が予想した程上
がらないことがわかった。又、この部分は充分加熱され
ないため図３に示す通り通常のスート堆積体２０，２１
の中に密度の低い柔らかいスート堆積層２３が生じ、こ
れがひびあるいは割れの原因となった。However, as shown in FIG.
, 13 interfere with each other, the soot flow 30 and the flame 40 are disturbed, and at the surface 24 of the soot deposit, these flows float, and it was found that the deposition rate did not increase as expected. Also, since this part is not heated sufficiently, the normal soot deposit bodies 20, 21 as shown in FIG.
A soft soot deposit layer 23 with a low density was formed in the steel, which caused cracks or cracks.
【００１０】一方、図４に示すように２本のバーナ１４
，１５をそれらの火炎の先端が離れる程離してスートを
合成すると中間のスート２５の部分は火炎が届かないた
め密度の低いスートが付着することとなる。この場合も
前記図２の場合と同様に柔らかいスート堆積層２３が生
ずる。そこで発明者等は２つの火炎が干渉せずかつ相隣
るバーナ間ではスート表面を間隙なくその火炎により加
熱しながらスートを合成すればよいと考えた。On the other hand, as shown in FIG.
, 15 so that the tips of their flames are separated enough to synthesize soot, the soot 25 in the middle cannot be reached by the flames, and soot with a low density will adhere to it. In this case as well, a soft soot deposited layer 23 is produced as in the case of FIG. Therefore, the inventors thought that it would be sufficient to synthesize soot while the two flames do not interfere and the soot surface is heated by the flame without any gaps between adjacent burners.
【００１１】その方法として、図１に示すように２本の
バーナ１０，１１を母材２０の成長方向に対して対向さ
せかつ上下の位置をバーナ１０の火炎の下部とバーナ１
１の火炎の上部が若干重なる範囲に配置することにより
２つの火炎４０が相互に干渉することなく、かつ出発材
５０が１周する間に間隙なくどちらかのバーナで母材２
０の表面を加熱しながらスートを合成する方法を考案し
た。As a method, as shown in FIG.
By arranging the flames 40 in a range where the upper parts of the flames 40 overlap slightly, the two flames 40 do not interfere with each other, and while the starting material 50 makes one revolution, either burner burns the base material 2 without any gap.
We devised a method to synthesize soot while heating the surface of 0.
【００１２】これによって、堆積速度はバーナ１本の場
合のほぼ２倍となり、スート母材の割れも発生しない。
この例ではバーナ１０と１１を回転軸に対して１８０゜
に配置したが１２０゜にすれば３本にすることができる
。又、１８０゜の位置に高低差をつけて図５に示す如く
配置することもできる。[0012] As a result, the deposition rate is approximately twice that of a single burner, and cracks in the soot base material do not occur. In this example, the burners 10 and 11 are arranged at 180 degrees with respect to the rotation axis, but if they are arranged at 120 degrees, the number of burners can be reduced to three. Alternatively, they can be arranged with height differences at 180° positions as shown in FIG.
【００１３】[0013]
【比較例１】図４に示す如く２本のバーナ１４，１５か
らの火炎の先端が離れる状態でスートを生成し、石英ガ
ラス棒の周囲に堆積した。バーナは８重管構造とし、第
１ポートからは原料ガスとしてＳｉＣｌ４：４リットル
／分、第２，６ポートからはＨ２：９０リットル／分、
第４，８ポートからはＯ２：６５リットル／分、第３，
５，７ポートからはＡｒ：１０リットル／分を流したス
ートを堆積した後、放置し冷却中に割れが発生した。Comparative Example 1 As shown in FIG. 4, soot was generated when the tips of the flames from the two burners 14 and 15 were separated and deposited around the quartz glass rod. The burner has an 8-pipe structure, with SiCl4 as the raw material gas from the first port: 4 liters/min, and H2: 90 liters/min from the second and sixth ports.
O2 from 4th and 8th ports: 65 liters/min, 3rd,
After depositing soot in which Ar was flowed at 10 liters/min from ports 5 and 7, cracks occurred during cooling after being left to stand.
【００１４】[0014]
【比較例２】図２に示す如く２本のバーナ１２，１３か
らの火炎が干渉する状態まで近づけてスートを生成し石
英ガラス棒の周囲に堆積した。スート合成条件は比較例
１と同じにした。堆積速度は１３．９ｇ／分、収率は６
５％であった。このスート堆積体を１日放置したところ
ひびが生じた。Comparative Example 2 As shown in FIG. 2, the flames from the two burners 12 and 13 were brought close enough to interfere with each other to generate soot, which was deposited around the quartz glass rod. The soot synthesis conditions were the same as in Comparative Example 1. Deposition rate is 13.9 g/min, yield is 6
It was 5%. When this soot deposit was left for one day, cracks appeared.
【００１５】[0015]
【実施例２】図１に示す如く２本のバーナ１０，１１が
石英ガラス棒５０に対して対称でそれらの火炎が出発材
５０が１回転する間に隙間の生じない配置とし、スート
合成条件は比較例１と同じにした。堆積速度は１５．６
ｇ／分、収率は７３％であった。このスート堆積体を１
週間放置してもひび等は生じなかった。その後、加熱透
明化しガラス母材を製造することができた。[Embodiment 2] As shown in FIG. 1, two burners 10 and 11 are arranged symmetrically with respect to a quartz glass rod 50, and their flames are arranged so that no gap occurs during one rotation of the starting material 50, and soot synthesis conditions are set. was the same as Comparative Example 1. The deposition rate is 15.6
g/min, yield was 73%. This soot deposit is 1
No cracks appeared even after leaving it for a week. Thereafter, it was made transparent by heating, and a glass base material could be manufactured.
【００１６】[0016]
【発明の効果】本発明の方法によれば光ファイバ等のガ
ラス母材を製造するに際し、スート堆積体を安定に高速
合成することができる。According to the method of the present invention, a soot deposit can be synthesized stably and at high speed when manufacturing a glass base material such as an optical fiber.
【図１】本発明によるスートを堆積する方法の説明図で
ある。FIG. 1 is an illustration of a method of depositing soot according to the invention.
【図２】バーナ間隔が近すぎる場合の説明図である。FIG. 2 is an explanatory diagram when the burner intervals are too close.
【図３】スート堆積体の断面図である。FIG. 3 is a cross-sectional view of a soot deposit body.
【図４】バーナ間隔が離れすぎる場合の説明図である。FIG. 4 is an explanatory diagram when the burners are spaced too far apart.
【図５】本発明による他の実施例を示す図である。FIG. 5 is a diagram showing another embodiment according to the present invention.
１０，１１，１２，１３，１４，１５，１６，１７，１
８，１９：バーナ
２０，２１，２２：スート堆積体
２３，２４，２５：密度の低いスート堆積体３０：スー
ト
４０：火炎
５０：出発材10, 11, 12, 13, 14, 15, 16, 17, 1
8, 19: Burners 20, 21, 22: Soot deposits 23, 24, 25: Soot deposits with low density 30: Soot 40: Flame 50: Starting material
Claims (3)
ら噴出させ火炎中で反応して生成するスートを回転しな
がらトラバースする出発材の周囲に堆積し、これを加熱
透明化してガラス母材を製造する方法において、トラバ
ース軸方向に隣接するバーナの中心軸がトラバース軸を
含む同一の平面内のトラバース軸に対して同じ面内に存
在しないように該バーナを配置し、かつ母材が一回転す
る間にトラバース軸方向に隣接するバーナから噴出する
火炎によりその間の母材の表面を隙間なく加熱すること
を特徴とするガラス母材の製造方法。Claim 1: Gaseous glass raw materials are ejected from a plurality of burners, and the soot produced by reacting in a flame is deposited around the starting material as it traverses while rotating, and is heated and made transparent to form a glass base material. In the manufacturing method, the burners are arranged so that the central axes of burners adjacent in the traverse axis direction are not in the same plane with respect to the traverse axis in the same plane containing the traverse axis, and the base material rotates once. A method for manufacturing a glass base material, which comprises heating the surface of the base material therebetween with flames ejected from burners adjacent in the direction of the traverse axis, without any gaps.
中心軸がトラバース軸を含む同一の平面内のトラバース
軸に対して反対側に存在するようにバーナを配置するこ
とを特徴とする請求項１記載のガラス母材の製造方法。2. The burners are arranged such that the central axes of burners adjacent in the traverse axis direction are located on opposite sides of the traverse axis within the same plane containing the traverse axis. A method for manufacturing a glass base material.
ア、コアとクラッド又はコアとクラッド及びジャケット
の一部からなるガラス心体であることを特徴とする請求
項１、２記載のガラス母材の製造方法。3. The glass matrix according to claim 1 or 2, wherein the starting material is a glass core consisting of a core, a core and a cladding, or a part of a core, a cladding, and a jacket constituting an optical fiber matrix. Method of manufacturing wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6999891A JPH04305033A (en) | 1991-04-02 | 1991-04-02 | Production of glass preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6999891A JPH04305033A (en) | 1991-04-02 | 1991-04-02 | Production of glass preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04305033A true JPH04305033A (en) | 1992-10-28 |
Family
ID=13418852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6999891A Pending JPH04305033A (en) | 1991-04-02 | 1991-04-02 | Production of glass preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04305033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002083581A3 (en) * | 2001-04-17 | 2003-02-13 | Bular Llc | Apparatus having a plurality of deposition burners and method of forming silica glass preforms |
-
1991
- 1991-04-02 JP JP6999891A patent/JPH04305033A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002083581A3 (en) * | 2001-04-17 | 2003-02-13 | Bular Llc | Apparatus having a plurality of deposition burners and method of forming silica glass preforms |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03279234A (en) | Production of parent material of preform of optical fiber | |
| JP2004035365A (en) | Multiple pipe burner and method of manufacturing glass body using the same | |
| US20030101770A1 (en) | Method and system for producing deposit of fine glass particles | |
| JPS6126532A (en) | Production of base material for optical fiber | |
| JPH04305033A (en) | Production of glass preform | |
| JPH05323130A (en) | Multifocus type burner and production of glass particulate deposited body by using this burner | |
| KR100496449B1 (en) | Outside vapor deposition apparatus for making optical fiber preform and method of making optical fiber preform using the same | |
| JP2612941B2 (en) | Method for producing porous optical fiber preform | |
| JP3653902B2 (en) | Glass base material synthesis burner and glass base material manufacturing method | |
| JP3567574B2 (en) | Burner for synthesis of porous glass base material | |
| JPH02164733A (en) | Production of glass fine particle deposited body | |
| JPH02275725A (en) | Production of vitreous fine granule accumulation | |
| JP2003313043A (en) | Method for manufacturing porous preform for optical fiber and burner device for manufacture of optical fiber porous preform | |
| JPH0525817B2 (en) | ||
| JPS60260433A (en) | Manufacture of base material for optical fiber | |
| JPH09188522A (en) | Torch for synthesizing glass fine particle | |
| KR930001938B1 (en) | Method for producing porous glass preform for optical fiber | |
| JPH0777968B2 (en) | Optical fiber preform base material manufacturing method | |
| JPS6177630A (en) | Manufacture of mother material glass for light-conducting glass fiber | |
| JPS6242865B2 (en) | ||
| JP2986453B1 (en) | Apparatus and method for manufacturing glass preform for optical fiber | |
| JPH1121143A (en) | Production of preform for optical fiber | |
| JPS6355135A (en) | Production of optical fiber preform | |
| JPS63123828A (en) | Production of porous preform for optical fiber | |
| JPS6172645A (en) | Manufacture of optical fiber preform |