JPH0226908Y2 - - Google Patents
Info
- Publication number
- JPH0226908Y2 JPH0226908Y2 JP1985139892U JP13989285U JPH0226908Y2 JP H0226908 Y2 JPH0226908 Y2 JP H0226908Y2 JP 1985139892 U JP1985139892 U JP 1985139892U JP 13989285 U JP13989285 U JP 13989285U JP H0226908 Y2 JPH0226908 Y2 JP H0226908Y2
- Authority
- JP
- Japan
- Prior art keywords
- base material
- hole
- glass base
- glass
- diameter
- 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.)
- Expired
Links
- 239000011521 glass Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 18
- 239000013307 optical fiber Substances 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 238000009987 spinning Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C03B37/029—Furnaces therefor
-
- 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
- C03B2205/80—Means for sealing the preform entry or upper end of the furnace
-
- 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
- C03B2205/82—Means for sealing the fibre exit or lower end of the furnace
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)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、ガラス母材を加熱軟化し、光フアイ
バ８に線引きするための光フアイバ紡糸炉に関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical fiber spinning furnace for heating and softening a glass base material and drawing it into an optical fiber 8.
この種の光フアイバ紡糸炉内には、該炉内のヒ
ータの温度変動の防止、該炉内の外気からのシー
ル等の為に、この炉内にて一定の流れとなるアル
ゴン等の不活性ガスが流入されている。
This type of optical fiber spinning furnace contains a constant flow of inert gas such as argon in order to prevent temperature fluctuations in the heater inside the furnace and to seal the inside of the furnace from the outside air. Gas is flowing.
従つて、従来では、プリフオームのときに発生
したガラス母材の径変動部や該ガラス母材を保持
するガラス母材と異なる径のガラスロツド等が上
記炉内に挿入されれば、ガス流出口の変動のため
不活性ガスの炉外への流出等により、該不活性ガ
スの流れが変化して、ヒータへのヒートゾーンが
変動するので、母材を線引きして形成される光フ
アイバの径が変動するという問題点があつた。 Therefore, conventionally, if a diameter varying part of the glass base material generated during preforming or a glass rod with a diameter different from that of the glass base material that holds the glass base material is inserted into the furnace, the gas outlet will change. Due to fluctuations, the flow of the inert gas changes as the inert gas flows out of the furnace, and the heat zone to the heater changes, so the diameter of the optical fiber formed by drawing the base material changes. There was a problem with fluctuations.
本考案は従来のこのような問題点を解決して、
径変動のほとんどない光フアイバを提供すること
ができる光フアイバ紡糸炉を提供することを目的
とする。 This invention solves these conventional problems and
An object of the present invention is to provide an optical fiber spinning furnace that can provide optical fibers with almost no diameter variation.
本考案の光フアイバ紡糸炉は、内周面がガラス
母材の外周面に近接する孔径可変孔部を備えた少
なくとも１個のガラス母材対応シール部材と、内
周面がガラスロツドの外周面に近接する孔径可変
孔部を備えた少なくとも１個のガラスロツド対応
シール部材と、を長手方向に沿つて所定間隔に配
設して、ガラス母材が挿入される挿入孔の入口部
を施蓋状としている。
The optical fiber spinning furnace of the present invention includes at least one glass preform compatible sealing member having a variable diameter hole portion whose inner circumferential surface is close to the outer circumferential surface of the glass rod; At least one glass rod compatible sealing member having adjacent variable diameter hole portions is arranged at predetermined intervals along the longitudinal direction, and the entrance portion of the insertion hole into which the glass base material is inserted is covered. There is.
上述の如く構成すれば、ガラス母材対応シール
部材の孔部は、ガラス母材の径に対応して孔径を
変化させることができ、ガラスロツド対応シール
部材の孔部はガラスロツドの径に対応して孔径を
変化させることができるので、不活性ガスの孔部
から炉外への流出量を一定に保つことができる。
従つて、不活性ガスの流れの変化がなくヒータの
ヒートゾーンの変動が生ずることがない。
With the above-described structure, the diameter of the hole in the sealing member for glass base material can be changed in accordance with the diameter of the glass base material, and the hole in the sealing member for glass rod can be changed in diameter in accordance with the diameter of the glass rod. Since the hole diameter can be changed, the amount of inert gas flowing out of the furnace from the hole can be kept constant.
Therefore, there is no change in the flow of the inert gas and no fluctuation in the heat zone of the heater occurs.
以下、実施例を示す図面に基づいて本考案を詳
説する。
Hereinafter, the present invention will be explained in detail based on drawings showing embodiments.
第１図において、１は中空部２を有する炉本体
であつて、該中空部２にカーボン抵抗体からなる
ヒータ３が内装されている。さらに、該炉本体１
には、中空部２と外部とを連通する挿入孔４及び
挿出孔５が設けられている。 In FIG. 1, reference numeral 1 denotes a furnace body having a hollow part 2, in which a heater 3 made of a carbon resistor is installed. Furthermore, the furnace body 1
is provided with an insertion hole 4 and an insertion hole 5 that communicate the hollow portion 2 with the outside.
しかして、６は上記挿入孔４に挿入されるガラ
ス母材であつて、ガラスロツド７にて保持されて
いる。そして、該ガラス母材６は、上記ヒータ３
にて加熱軟化され、さらに、線引きされ、挿出孔
５より光フアイバ８として挿出される。 A glass base material 6 is inserted into the insertion hole 4 and is held by a glass rod 7. Then, the glass base material 6 is connected to the heater 3.
The optical fiber 8 is heated and softened in the process, and then drawn, and inserted into the insertion hole 5 as an optical fiber 8.
また、上記炉本体１の中空部２には、一定の流
れとなるアルゴン等の不活性ガスが流入される。
即ち、この不活性ガスは、上記挿入孔４に連通し
ているガス注入孔９，９′にて、中空部２内に流
入され、また、該中空部２に流入された不活性ガ
スは、該中空部２内にて一定の流れとなるよう
に、挿入孔４に連通されたガス吸入孔１０から外
部へ流出される。従つて、この一定の流れの不活
性ガスにて、ヒータ３の温度変動が防止されると
共に、外気から中空部２がシールされる。しか
も、ヒータ３を構成するカーボンの燃焼廃棄物は
該不活性ガスと共に外部へ放出され、光フアイバ
８には、付着しない。 Further, an inert gas such as argon is introduced into the hollow portion 2 of the furnace body 1 in a constant flow.
That is, this inert gas flows into the hollow part 2 through the gas injection holes 9 and 9' communicating with the insertion hole 4, and the inert gas flows into the hollow part 2 as follows. The gas flows out from the gas suction hole 10 connected to the insertion hole 4 so as to form a constant flow within the hollow portion 2 . Therefore, this constant flow of inert gas prevents temperature fluctuations in the heater 3 and seals the hollow portion 2 from the outside air. Moreover, the combustion waste of carbon constituting the heater 3 is discharged to the outside together with the inert gas, and does not adhere to the optical fiber 8.
しかして、１１，１１は炉本体１の挿入孔４の
入口部１２に付設されたシール部材であつて、該
挿入孔４を施蓋している。具体的には、シール部
材１１は、第２図と第３図に示す様に、複数枚の
シール形成片１３…を円周等ピツチにて配設し、
そのシール形成片１３…の重合量を規制すること
により中央部に孔径可変自在の孔部１４を形成さ
せるもので、いわゆる「絞り」を使用している。
また、シール部材１１は、入口部１２にビス等の
固着具１５にて固着される外鍔部１６を有する円
筒体１７に、図例では２個取付けされている。即
ち、内周面がガラス母材６の外周面に近接する孔
径可変孔部１４を備えた少なくとも１個のガラス
母材対応シール部材１１と、内周面がガラスロツ
ドの外周面に近接する孔径可変孔部１４を備えた
少なくとも１個のガラスロツド対応シール部材１
１と、を長手方向に沿つて所定間隔に配設して、
挿入孔４の入口部１２を施蓋状としている。１８
はシール形成片１３…の重合量を調整する操作レ
バーである。 Reference numerals 11 and 11 are sealing members attached to the entrance portion 12 of the insertion hole 4 of the furnace body 1, and cover the insertion hole 4. Specifically, as shown in FIGS. 2 and 3, the seal member 11 includes a plurality of seal forming pieces 13 arranged at equal pitches around the circumference,
By regulating the amount of polymerization of the seal forming pieces 13, a hole 14 whose diameter can be freely changed is formed in the center, and a so-called "diaphragm" is used.
Further, in the illustrated example, two seal members 11 are attached to a cylindrical body 17 having an outer flange portion 16 that is fixed to the inlet portion 12 with a fixing member 15 such as a screw. That is, at least one glass base material compatible sealing member 11 is provided with a variable diameter hole section 14 whose inner peripheral surface is close to the outer peripheral surface of the glass rod 6, and a variable diameter hole section whose inner peripheral surface is close to the outer peripheral surface of the glass rod. At least one glass rod compatible sealing member 1 with a hole 14
1 and are arranged at predetermined intervals along the longitudinal direction,
The entrance portion 12 of the insertion hole 4 is covered. 18
is an operating lever for adjusting the amount of polymerization of the seal forming pieces 13.
なお、挿出孔５には、仮想線で示す様に、光フ
アイバ８が挿通される孔が設けられた上記シール
部材１１と同様な遮断部材１９を付設している。 The insertion hole 5 is provided with a blocking member 19 similar to the sealing member 11 described above, which is provided with a hole through which the optical fiber 8 is inserted, as shown by the imaginary line.
従つて、上述の如く構成された光フアイバ紡糸
炉は、プリフオームのときに発生したガラス母材
６の径変動部やガラス母材６とガラスロツド７と
の連結部位２０等が炉内に挿入された場合におい
て、シール部材１１の孔１４を、第２図及び第３
図に示す様に種々の径に対応させて、ガラス母材
６の外周面２１乃至ガラスロツド７の外周面２２
に近接させることができる。つまり、非接触シー
ル作用をなすもので、挿入孔４から外部への不活
性ガスの流出量は変化せず、炉本体１の中空部２
内の不活性ガスの流れに変動が生じない。従つ
て、ヒータ３によるガラス母材６へのヒートゾー
ンが変動しないので、線引きされて形成される光
フアイバ８の径を一定に保つことができる。 Therefore, in the optical fiber spinning furnace configured as described above, the diameter varying portion of the glass base material 6 generated during preforming, the connecting portion 20 between the glass base material 6 and the glass rod 7, etc. are inserted into the furnace. In this case, the hole 14 of the sealing member 11 is
As shown in the figure, the outer circumferential surface 21 of the glass base material 6 to the outer circumferential surface 22 of the glass rod 7 are adjusted to correspond to various diameters.
can be placed close to. In other words, it performs a non-contact sealing action, and the amount of inert gas flowing out from the insertion hole 4 to the outside does not change.
No fluctuation occurs in the flow of inert gas inside. Therefore, since the heat zone applied to the glass base material 6 by the heater 3 does not change, the diameter of the optical fiber 8 formed by drawing can be kept constant.
また、第４図は、ガラス母材６とガラスロツド
７とが、同一軸心上に形成されず、屈曲した状態
に形成された場合の炉本体１への挿入状態を示
し、この場合においても、シール部材１１の孔部
１４の孔径を調整して、該孔部１４を、ガラス母
材６の外周面２１乃至ガラスロツド７の外周面２
２に近接させることができる。つまり、炉本体１
の中空部２内の不活性ガスの流れに変動を生じさ
せない。 Further, FIG. 4 shows a state in which the glass base material 6 and the glass rod 7 are inserted into the furnace body 1 when they are not formed on the same axis but are bent. The hole diameter of the hole 14 of the sealing member 11 is adjusted so that the hole 14 is connected to the outer circumferential surface 21 of the glass base material 6 to the outer circumferential surface 2 of the glass rod 7.
It can be made close to 2. In other words, the furnace body 1
No fluctuation is caused in the flow of inert gas in the hollow part 2 of.
本考案は図示の実施例に限定されず、本考案の
要旨を逸脱しない範囲で設計変更自由であり、例
えば、ガラス母材対応シール部材１１及びガラス
ロツド対応シール部材１１を夫々２個以上とする
も自由である。 The present invention is not limited to the illustrated embodiment, and the design may be changed without departing from the gist of the present invention. For example, the number of sealing members 11 corresponding to the glass base material and the sealing members 11 corresponding to the glass rod may be two or more each. Be free.
本考案は上述の如く構成されているので次に記
載する効果を奏する。
Since the present invention is constructed as described above, it produces the following effects.
ガラス母材対応シール部材１１の孔部１４は、
ガラス母材６の径に対応して孔径を変化させるこ
とができ、ガラスロツド対応シール部材１１の孔
部１４はガラスロツド７の径に対応して孔径を変
化させることができるので、ガラス母材６の首部
のサイズ変化が大きい場合に該母材６が下降して
ガラス母材対応シール部材１１ではシールできな
いときでも、ガラスロツド対応シール部材１１に
てシールすることができ、常に、不活性ガスの孔
部から炉外への流出量を一定に保つことができ、
該炉内の不活性ガスの流れの変動を生じさせな
い。従つて、ヒータ３よるガラス母材６へのヒー
トゾーンの変動がなく、該ガラス母材６は常に一
定に加熱軟化され、線引きされて形成される光フ
アイバ８の径を一定とすることができる。 The hole 14 of the glass base material compatible seal member 11 is
The hole diameter can be changed according to the diameter of the glass base material 6, and the hole diameter of the hole 14 of the glass rod compatible sealing member 11 can be changed according to the diameter of the glass rod 7. Even when the base material 6 descends and cannot be sealed with the glass rod compatible sealing member 11 when the size of the neck changes greatly, the glass rod compatible sealing member 11 can seal the neck, and the inert gas hole can always be sealed. The amount of water flowing out of the furnace can be kept constant.
No fluctuations in the flow of inert gas within the furnace occur. Therefore, there is no fluctuation in the heat zone of the glass base material 6 caused by the heater 3, and the glass base material 6 is always heated and softened at a constant rate, so that the diameter of the optical fiber 8 formed by drawing can be made constant. .
第１図は本考案に係る一実施例を示す断面図、
第２図は第１図におけるＸ−Ｘ線断面図、第３図
は第１図におけるＹ−Ｙ線断面図、第４図はガラ
ス母材等の外径に対応する孔部の対応状態を説明
する断面図である。
４…挿入孔、６…ガラス母材、１１…シール部
材、１２…入口部、１４…孔部、２１，２２…外
周面。
FIG. 1 is a sectional view showing an embodiment of the present invention;
Figure 2 is a sectional view taken along the line X-X in Figure 1, Figure 3 is a sectional view taken along the Y-Y line in Figure 1, and Figure 4 shows the corresponding state of the hole corresponding to the outer diameter of the glass base material, etc. It is a sectional view for explanation. 4... Insertion hole, 6... Glass base material, 11... Seal member, 12... Inlet part, 14... Hole part, 21, 22... Outer peripheral surface.
Claims (1)
変孔部を備えた少なくとも１個のガラス母材対応
シール部材と、内周面がガラスロツドの外周面に
近接する孔径可変孔部を備えた少なくとも１個の
ガラスロツド対応シール部材と、を長手方向に沿
つて所定間隔に配設して、ガラス母材が挿入され
る挿入孔の入口部を施蓋状としたことを特徴とす
る光フアイバ紡糸炉。 At least one glass base material compatible sealing member having a variable diameter hole portion whose inner circumferential surface is close to the outer circumferential surface of the glass rod; and a variable diameter hole portion whose inner circumferential surface is close to the outer circumferential surface of the glass rod. Optical fiber spinning characterized in that at least one glass rod compatible sealing member is arranged at predetermined intervals along the longitudinal direction, and the entrance part of the insertion hole into which the glass base material is inserted is covered. Furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985139892U JPH0226908Y2 (en) | 1985-09-12 | 1985-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985139892U JPH0226908Y2 (en) | 1985-09-12 | 1985-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6251148U JPS6251148U (en) | 1987-03-30 |
| JPH0226908Y2 true JPH0226908Y2 (en) | 1990-07-20 |
Family
ID=31046221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985139892U Expired JPH0226908Y2 (en) | 1985-09-12 | 1985-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226908Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2754551B2 (en) * | 1988-02-02 | 1998-05-20 | 住友電気工業株式会社 | Optical fiber manufacturing method |
| JP2005008475A (en) * | 2003-06-18 | 2005-01-13 | Shin Etsu Chem Co Ltd | Optical fiber drawing apparatus |
| JP4817339B2 (en) | 2009-02-17 | 2011-11-16 | 信越化学工業株式会社 | Sealing material for heating furnace |
| JP6476628B2 (en) * | 2014-07-25 | 2019-03-06 | 住友電気工業株式会社 | Optical fiber manufacturing method and manufacturing apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036347A (en) * | 1983-07-27 | 1985-02-25 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Optical fiber drawing device |
| JPS60155541A (en) * | 1984-01-23 | 1985-08-15 | Furukawa Electric Co Ltd:The | Heating furnace for drawing optical glass rod |
-
1985
- 1985-09-12 JP JP1985139892U patent/JPH0226908Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036347A (en) * | 1983-07-27 | 1985-02-25 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Optical fiber drawing device |
| JPS60155541A (en) * | 1984-01-23 | 1985-08-15 | Furukawa Electric Co Ltd:The | Heating furnace for drawing optical glass rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6251148U (en) | 1987-03-30 |
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