JPH04182331A - Cooling device for optical fiber - Google Patents
Cooling device for optical fiberInfo
- Publication number
- JPH04182331A JPH04182331A JP2303905A JP30390590A JPH04182331A JP H04182331 A JPH04182331 A JP H04182331A JP 2303905 A JP2303905 A JP 2303905A JP 30390590 A JP30390590 A JP 30390590A JP H04182331 A JPH04182331 A JP H04182331A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- cooling
- air blowing
- blowing cooling
- hole
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 125
- 239000013307 optical fiber Substances 0.000 title claims abstract description 82
- 238000007664 blowing Methods 0.000 claims description 61
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression 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
- C03B37/02—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
- 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
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/55—Cooling or annealing the drawn fibre prior to coating using a series of coolers or heaters
-
- 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
- C03B2205/90—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles
-
- 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
- C03B2205/90—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles
- C03B2205/92—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles using means for gradually reducing the cross-section towards the outlet or around the preform draw end, e.g. tapered
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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、光ファイバ母材から紡糸された光ファイバを
、その移動方向に多段配置された各エアー吹出し冷却部
で冷却する光ファイバ冷却装置に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention provides an optical fiber cooling device that cools an optical fiber spun from an optical fiber preform using air blowing cooling units arranged in multiple stages in the direction of movement of the optical fiber. It is related to.
［従来の技術］
光ファイバ］−は、第４図に示すように、光ファイバ母
材２を溶融炉３を用いて約２０００’Ｃで加熱しつつ引
取機４で引取りながら紡糸することにより得、得られた
光ファイバ」−は溶融炉３の下部のノズル部３ａより送
り出し、被覆ダイス５に通して外周に樹脂を被覆し、次
に樹脂硬化器６に通して被覆樹脂の硬化を行うことによ
り製造している。なお、ノズル部３ａは光ファイバ母＋
」２のネックダウン部２ａを安定化させるためのもので
ある。[Prior Art] Optical fiber] is produced by spinning an optical fiber preform 2 while heating it at about 2000'C using a melting furnace 3 and taking it off with a take-off machine 4, as shown in FIG. The obtained optical fiber is sent out from the nozzle part 3a at the bottom of the melting furnace 3, passed through a coating die 5 to coat the outer periphery with resin, and then passed through a resin hardener 6 to harden the coated resin. Manufactured by Note that the nozzle part 3a is an optical fiber base +
This is for stabilizing the neck-down portion 2a of 2.
紡糸を高速（例えは、２００ ｍ／ｍｉｎ ）で実施す
る場合、紡糸直後の光ファイバ］にＨｅ、Ｎ２゜エアー
等を吹き付け、被覆ダイス５に入る光ファイバ千の温度
を５０℃以下にしている。光ファイバ十の温度かこれ以
上になっていると、被覆ダイス５内の樹脂温度か上昇す
るため、適正な厚みの被覆が行えない。When spinning is carried out at a high speed (for example, 200 m/min), the temperature of the optical fiber entering the coating die 5 is kept below 50° C. by spraying He, N2° air, etc. onto the optical fiber immediately after spinning. . If the temperature of the optical fiber is at or above this temperature, the temperature of the resin in the coating die 5 will rise, making it impossible to coat the optical fiber with an appropriate thickness.
一方、製造コストの競争上から高価なＴ−Ｔ ｅを用い
ず、安価なエアーをコンプレッサーを用いて圧縮後、除
湿し、除塵して第５図に示す如き構造のエアー吹出し冷
却部７を光ファイバ」−の移動路に沿って第４図に示す
ように多段配置した光ファイバ冷却装置８から光ファイ
バ１に吹付けて冷却することが提案されている。これら
エアー吹出し冷却部７は、冷却筒部９を有し、該冷却筒
部８の軸心には光ファイバ十を貫通させる光ファイバ貫
通孔１０かストレート孔として設けられ、該冷却筒部８
の外周の一部にはエアー人口１１か設けられ、該冷却筒
部８内にはエアー人口１千に入ったエアーを調圧するバ
ッファ一部１−２が光ファイバ貫通孔１０に対して同心
状に設けられ、該冷却筒部８の内周にはバッファ一部１
２から供給されるエアーを光ファイバ１に交叉する向き
で吹出すエアー吹出し口１３が設けられた構造になって
いる。このようなタイプのエアー吹出し冷却部７を、本
発明ではストレート孔型のエアー吹出し冷却部と称する
。On the other hand, due to competitive manufacturing costs, an expensive T-Te is not used, and after compressing cheap air using a compressor, dehumidifying and removing dust, the air blowing cooling section 7 having the structure shown in FIG. It has been proposed to cool the optical fiber 1 by spraying it from optical fiber cooling devices 8 arranged in multiple stages as shown in FIG. 4 along the path of movement of the fiber. These air blowing cooling parts 7 have a cooling cylinder part 9, and an optical fiber through hole 10 or a straight hole through which an optical fiber 10 is passed is provided at the axis of the cooling cylinder part 8.
An air volume 11 is provided on a part of the outer periphery of the cooling cylinder part 8, and a buffer part 1-2 for regulating the pressure of the air that has entered the air volume 1,000 is concentric with the optical fiber through hole 10. A buffer portion 1 is provided on the inner periphery of the cooling cylinder portion 8.
The structure is such that an air outlet 13 is provided to blow out air supplied from the optical fiber 1 in a direction crossing the optical fiber 1. In the present invention, this type of air blowing cooling section 7 is referred to as a straight hole type air blowing cooling section.
第４図及び第５図に示す如き構成の光ファイバ製造装置
では、光ファイバ千の線引き速度を、生産性の向上と、
原価低減のために更に高速度化（２００ｍ／ｍｉｎ −
〜５００〜６００ｍ／ｍｉｎ ）することが要求されて
いる。In the optical fiber manufacturing apparatus configured as shown in FIGS. 4 and 5, the optical fiber drawing speed of 1,000 times can be increased by improving productivity.
Higher speed (200m/min -
~500~600m/min).
［発明が解決しようとする課題］
第５図に示すストレート孔型のエアー吹出し冷却部７の
みを用いた光ファイバ冷却装置８では、光ファイバ１の
線引き速度をパラメータとして冷却能力曲線を描くと、
第６図に実線で示すようになり、光ファイバ１の線引き
速度を上げるためにはエアー吹出し口１３から吹出すエ
アーの流量を増加させる必要がある。[Problems to be Solved by the Invention] In the optical fiber cooling device 8 using only the straight hole type air blowing cooling section 7 shown in FIG. 5, when the cooling capacity curve is drawn using the drawing speed of the optical fiber 1 as a parameter,
As shown by the solid line in FIG. 6, in order to increase the drawing speed of the optical fiber 1, it is necessary to increase the flow rate of air blown out from the air outlet 13.
一方、エアーの流量を大きくすると、第７図に実線で示
すように光ファイバ１の振動振幅が大きくなり、エアー
流量が約２０β／ ｍ ｉ ｎで危険振幅とされている
０、１ｍｍを越えてしまう問題点がある。On the other hand, when the air flow rate is increased, the vibration amplitude of the optical fiber 1 increases as shown by the solid line in Figure 7, and when the air flow rate is about 20β/min, it exceeds the dangerous amplitude of 0.1 mm. There is a problem.
光ファイバ１の振動振幅が大きくなると、溶融炉３の光
ファイバ母材２のネックダウン部２ａに影響し、光ファ
イバ１の強度低下の原因となり、また被覆ダイス５での
適正な樹脂の被覆が困難上なる問題点がある。When the vibration amplitude of the optical fiber 1 increases, it affects the neck-down portion 2a of the optical fiber preform 2 in the melting furnace 3, causing a decrease in the strength of the optical fiber 1, and also prevents proper resin coating with the coating die 5. There are some serious problems.
本発明の目的は、光ファイバの振動を有効に防止しつつ
冷却を行うことができる光ファイバ冷却装置を提供する
ことにある。An object of the present invention is to provide an optical fiber cooling device that can cool an optical fiber while effectively preventing vibration of the optical fiber.
［課題を解決するための手段］
上記の目的を達成するための本発明の詳細な説明すると
、下記の通りである。[Means for Solving the Problems] A detailed explanation of the present invention for achieving the above object is as follows.
請求項（１）の発明は、光ファイバ母材から紡糸された
光ファイバを、その移動方向に多段配置されたエアー吹
出し冷却部で冷却する光ファイバ冷却装置において、
前記各エアー吹出し冷却部のうち初段と最終段のエアー
吹出し冷却部は、前記光ファイバが通過する冷却筒部の
光ファイバ貫通孔かテーパ孔となっていて、該テーパ孔
内にその周方向からエアーを吹出す構造のテーパ孔型の
エアー吹出し冷却部であり、
前記エアー吹出し冷却部のうち初段と最終段を除いた中
間段の各エアー吹出し冷却部は、前記光ファイバか通過
する冷却筒部の光ファイバ貫通孔がストレート孔となっ
ていて、該ストレート孔内にその周方向からエアーを吹
出す構造のストレート孔型のエアー吹出し冷却部である
ことを特徴とする
請求項（２）の発明は、請求項（１）において、ストレ
ート孔型の前記各エアー吹出し冷却部は、それぞれ冷却
筒部が独立した構造になっていることを特徴とする
請求項（３）の発明は、請求項（１）において、ストレ
ート孔型の前記各エアー吹出し冷却部は、各冷却筒部が
相互間で連続した構造になっていることを特徴とする。The invention of claim (1) provides an optical fiber cooling device for cooling an optical fiber spun from an optical fiber preform with air blowing cooling sections arranged in multiple stages in the direction of movement of the optical fiber, including the following: The first-stage and final-stage air blowing cooling sections are optical fiber through holes or tapered holes in the cooling cylinder section through which the optical fiber passes, and the tapered holes have a structure in which air is blown into the tapered holes from the circumferential direction. The air blowing cooling section is a type of air blowing cooling section, and each of the air blowing cooling sections at the intermediate stage except for the first stage and the final stage among the air blowing cooling sections is such that the optical fiber through hole of the cooling cylinder part through which the optical fiber passes is a straight hole. The invention of claim (2) is characterized in that it is a straight hole type air blowing cooling part having a structure of blowing air into the straight hole from the circumferential direction thereof. The invention according to claim (3) is characterized in that each of the straight hole type air blowing cooling parts has an independent cooling cylinder part. Each of the air blowing cooling parts is characterized in that each cooling cylinder part has a continuous structure.
［作用］
請求項（１）に記載のテーパ孔型のエアー吹出し冷却部
は、冷却能力はストレート孔型のエアー吹出し冷却部よ
り劣るが、光ファイバに与える振動が小さいという特性
を持っている。[Function] The tapered hole type air blowing cooling unit according to claim (1) has a characteristic that the cooling capacity is inferior to that of the straight hole type air blowing cooling unit, but the vibration imparted to the optical fiber is small.
このようなテーパ孔型のエアー吹出し冷却部を、各段の
エアー吹出し冷却部のうちの初段と最終段に用い、これ
ら初段と最終段との間の中間のエアー吹出し冷却部とし
てストレート孔型のエアー吹出し冷却部を用いると、光
ファイバの振動を抑制して該光ファイバの冷却を良好に
行えるようになる。Such a tapered hole type air blowing cooling section is used for the first stage and the final stage of the air blowing cooling section of each stage, and a straight hole type air blowing cooling section is used as the intermediate air blowing cooling section between the first stage and the final stage. When the air blowing cooling unit is used, the vibration of the optical fiber can be suppressed and the optical fiber can be cooled well.
請求項（２）に記載のように、ストレート孔型の各エア
ー吹出し冷却部における各冷却筒部を独立した構造にす
ると、相互間の冷却筒部の間に空隙が存在し、各段のエ
アー吹出し口から吹出されたエアーは各段毎に冷却筒部
の両端から冷却筒部の外に排出させることができ、隣の
冷却筒部内に排出されるのを抑制でき、冷却を効率よく
行える。As described in claim (2), when each cooling cylinder part in each straight hole type air blowing cooling part is made to have an independent structure, a gap exists between the mutual cooling cylinder parts, and the air at each stage is The air blown out from the outlet can be discharged from both ends of the cooling cylinder part to the outside of the cooling cylinder part for each stage, and it can be suppressed from being discharged into the adjacent cooling cylinder part, and cooling can be performed efficiently.
請求項（３）に記載のように、ストレート孔型の各エア
ー吹出し冷却部における各冷却筒部を相互間で連続した
構造にすると、これらストレート孔型のエアー吹出し冷
却部の設置作業が容易となる。As described in claim (3), if each cooling cylinder part in each straight hole type air blowing cooling section is constructed to be continuous with each other, the installation work of these straight hole type air blowing cooling sections is facilitated. Become.
「実施例」
以下、本発明の実施例を図面を参照して詳細に説明する
。なお、前述した第４図及び第５図と対応する部分には
同一符号を例けて示している。"Embodiments" Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that parts corresponding to those in FIGS. 4 and 5 described above are indicated by the same reference numerals.
第１図は、本実施例で用いるテーパ孔型のエアー吹出し
冷却部１４の一実施例を示したものである。このテーパ
孔型のエアー吹出し冷却部１４は、冷却筒部１５を有し
、該冷却筒部１５の軸心には光ファイバ千を貫通させる
光ファイバ貫通孔１６かテーパ孔として設けられ、該冷
却筒部子５の外周の一部にはエアー人口１７か設けられ
、該冷却筒部１５内にはエアー人口１７に入ったエアー
を調圧するバッファ一部上８か光ファイバ貫通孔４６に
対して同心状に設けられ、該冷却筒部１５の内周にはバ
ッファ一部１８から供給されるエアーを光ファイバ１に
交叉する向きで吹出すエアー吹出し口１９が設けられた
構造となっている。FIG. 1 shows an embodiment of the tapered hole type air blowing cooling section 14 used in this embodiment. This tapered hole type air blowing cooling unit 14 has a cooling cylinder part 15, and an optical fiber through hole 16 for passing optical fibers through the cooling cylinder part 15 is provided as a tapered hole at the axis of the cooling cylinder part 15. An air port 17 is provided on a part of the outer periphery of the cylinder part 5, and a buffer portion for adjusting the pressure of the air entering the air port 17 is provided in the cooling cylinder part 15. The cooling tube portion 15 is provided concentrically with an air outlet 19 provided on the inner periphery of the cooling cylinder portion 15 for blowing out air supplied from the buffer portion 18 in a direction crossing the optical fiber 1.
このようなテーパ孔型のエアー吹出し冷却部１４は、例
えは全長を５０〜８０ｍｍ、テーパ孔よりなる光ファイ
バ貫通孔」６の最大内径部の直径を２０〜３０ｍｒｒ＋
、最小内径部の直径を１８〜３Ｑｍｍ、テーパ部の半角
θを５〜１−２°とする。Such a tapered hole type air blowing cooling unit 14 has a total length of 50 to 80 mm, and a diameter of 20 to 30 mrr+ at the maximum inner diameter of the tapered optical fiber through hole 6.
, the diameter of the minimum inner diameter portion is 18 to 3 Qmm, and the half angle θ of the tapered portion is 5 to 1-2°.
このようなテーパ孔型のエアー吹出し冷却部子４におけ
る光ファイバ貫通孔］６に光ファイバ１を３００ｍ／ｍ
ｉｎの線速で通して冷却能力の実験をしたところ第６図
に破線で示す結果か得られ、また振動抑制能力の実験を
したところ第７図に破線で示す結果か得られた。The optical fiber 1 is inserted into the optical fiber through hole 6 in such a tapered hole type air blowing cooling unit 4 at a distance of 300 m/m.
An experiment on the cooling capacity was conducted at a linear velocity of 1.5 in., and the results shown by the broken line in FIG. 6 were obtained, and an experiment on the vibration suppression ability was conducted, and the results shown by the broken line in FIG.
即ち、テーパ孔型のエアー吹出し冷却部１４はストレー
ト孔型のエアー吹出し冷却部７に比べると、冷却能力は
劣るが、振動が小さく、しかも振動抑制能力があること
が判明した。また、テーパ孔が光ファイバ１を安定させ
る効果がある。In other words, it has been found that the tapered hole type air blowing cooling section 14 has a lower cooling ability than the straight hole type air blowing cooling section 7, but has less vibration and vibration suppressing ability. Further, the tapered hole has the effect of stabilizing the optical fiber 1.
そこで本実施例の光ファイバ冷却装置８は、第４−図に
示すように、各段の各エアー吹出し冷却部のうち、初段
と最終段はテーパ孔型のエアー吹出し冷却部１４を用い
、初段と最終段を除いた中間段はストレート孔型のエア
ー吹出し冷却部７を用いて構成している。この場合、初
段のエアー吹出し冷却部１−４は第２図に示すような向
きで使用し、最終段のエアー吹出し冷却部１４は第２図
とは上下逆向きにして使用する。また、中間段のストレ
ート孔型のエアー吹出し冷却部７は４段とし、ノズル部
３ａの先端から被覆ダイス５までの距離りは６ｍとして
いる。Therefore, in the optical fiber cooling device 8 of this embodiment, as shown in FIG. The intermediate stages other than the final stage are constructed using a straight hole type air blowing cooling section 7. In this case, the air blowing cooling section 1-4 at the first stage is used in an orientation as shown in FIG. 2, and the air blowing cooling section 14 at the final stage is used in an upside-down direction from that shown in FIG. Further, the straight hole type air blowing cooling section 7 in the middle stage has four stages, and the distance from the tip of the nozzle part 3a to the coating die 5 is 6 m.
このような光ファイバ冷却装置８は、例えは表１のよう
な条件で使用する。Such an optical fiber cooling device 8 is used under the conditions shown in Table 1, for example.
表１−
ストレート孔型の各エアー吹出し冷却部７は、第３図に
示すように、各冷却筒部９を相互間で連結した構造とす
ることができる。Table 1 - Each straight hole type air blowing cooling section 7 can have a structure in which each cooling cylinder section 9 is interconnected, as shown in FIG.
このような構造にすると、各エアー吹出し冷却部７の設
置作業が容易になる。With such a structure, the installation work of each air blowing cooling section 7 becomes easy.
［発明の効果］
以上説明したように本発明に係る光ファイバ冷却装置に
よれは、下記のような効果を得ることができる。[Effects of the Invention] As explained above, the optical fiber cooling device according to the present invention can provide the following effects.
−１，１−
請求項（１）で用いているテーパ孔型のエアー吹出し冷
却部は、冷却能力はストレート孔型のエアー吹出し冷却
部より劣るが、光ファイバに与える振動が小さいという
特性を持っている。従って、請求項（１）の発明では、
このようなテーパ孔型のエアー吹出し冷却部を、各段の
エアー吹出し冷却部のうちの初段と最終段に用い、これ
ら初段と最終段との間の中間のエアー吹出し冷却部とし
てストレート孔型のエアー吹出し冷却部を用いているの
で、光ファイバの振動を抑制しつつ該光ファイバの冷却
を良好に行うことができる。-1,1- Although the tapered hole type air blowing cooling unit used in claim (1) has a cooling capacity inferior to that of the straight hole type air blowing cooling unit, it has the characteristic that vibrations exerted on the optical fiber are small. ing. Therefore, in the invention of claim (1),
Such a tapered hole type air blowing cooling section is used for the first stage and the final stage of the air blowing cooling section of each stage, and a straight hole type air blowing cooling section is used as the intermediate air blowing cooling section between the first stage and the final stage. Since the air blowing cooling section is used, the optical fiber can be cooled well while suppressing the vibration of the optical fiber.
請求項（２）の発明では、ストレート孔型の各エアー吹
出し冷却部における各冷却筒部を独立した構造にしてい
るので、相互間の冷却筒部の間に空隙が存在し、各段の
エアー吹出し口から吹出されたエアーは各段毎に冷却筒
部の両端から冷却筒部の外に排出されるようになり、隣
の冷却筒部内に排出されるのを抑制でき、冷却を効率よ
く行うことかできる。In the invention of claim (2), since each cooling cylinder part in each straight hole type air blowing cooling part has an independent structure, a gap exists between the mutual cooling cylinder parts, and the air at each stage is The air blown out from the outlet is now discharged outside the cooling cylinder from both ends of the cooling cylinder at each stage, preventing it from being discharged into the adjacent cooling cylinder, resulting in efficient cooling. I can do it.
請求項（３）の発明では、ストレート孔型の各エアー吹
出し冷却部における各冷却筒部を相互間で連続した構造
にしているので、これらストレート孔型のエアー吹出し
冷却部の設置作業か容易となる利点がある。In the invention of claim (3), since each cooling cylinder part in each straight hole type air blowing cooling section has a continuous structure, the installation work of these straight hole type air blowing cooling sections is easy. There are some advantages.
第１図は本実施例の光ファイバ冷却装置を用いた光ファ
イバ製造装置の一例の概略構成を示す断面図、第２図は
本実施例で用いているテーパ孔型のエアー吹出し冷却部
の一例の縦断面図、第３図はストレート孔型のエアー吹
出し冷却部の他の例を示す縦断面図、第４図は従来の光
ファイバ製造装置の概略構成を示す縦断面図、第５図は
ストレート孔型のエアー吹出し冷却部の一例の縦断面図
、第６図は従来と本発明の冷却能力の比較図、第７図は
従来と本発明の振動振幅の相違を示す比較図である。
■・・・光ファイバ、２・・・光ファイバ母材、３・・
・溶融炉、４・・・引取機、５・・・被覆ダイス、６・
・・樹脂硬化器、７・・・ストレート孔型のエアー吹出
し冷却部、８・・光ファイバ冷却装置、９・・冷却筒部
、１０・・光ファイバ貫通孔、１］・・・エアー人口、
］−２・・・バッファ一部、１３・・・エアー吹出し口
、１４・・テーパ孔型のエアー吹出し冷却部、１５・・
・冷却筒部、１−６・・・光ファイバ貫通孔、１７・・
・エアー人口、］８・・・バッファ一部、１９・・・エ
アー吹出し口。Fig. 1 is a sectional view showing a schematic configuration of an example of an optical fiber manufacturing apparatus using the optical fiber cooling device of this embodiment, and Fig. 2 is an example of a tapered hole type air blowing cooling section used in this embodiment. 3 is a vertical sectional view showing another example of a straight hole type air blowing cooling section, FIG. 4 is a vertical sectional view showing the schematic configuration of a conventional optical fiber manufacturing apparatus, and FIG. FIG. 6 is a longitudinal sectional view of an example of a straight hole type air blowing cooling section, FIG. 6 is a comparison diagram of the cooling capacity of the conventional and the present invention, and FIG. 7 is a comparison diagram showing the difference in vibration amplitude between the conventional and the present invention. ■...Optical fiber, 2...Optical fiber base material, 3...
・Melting furnace, 4... Taking machine, 5... Coated die, 6.
... Resin hardener, 7... Straight hole type air blowing cooling unit, 8... Optical fiber cooling device, 9... Cooling tube part, 10... Optical fiber through hole, 1]... Air population,
]-2...Buffer part, 13...Air outlet, 14...Tapered hole type air outlet cooling part, 15...
・Cooling cylinder part, 1-6...Optical fiber through hole, 17...
・Air population,] 8... Part of buffer, 19... Air outlet.
Claims (3)
の移動方向に多段配置されたエアー吹出し冷却部で冷却
する光ファイバ冷却装置において、前記各エアー吹出し
冷却部のうち初段と最終段のエアー吹出し冷却部は、前
記光ファイバが通過する冷却筒部の光ファイバ貫通孔が
テーパ孔となっていて、該テーパ孔内にその周方向から
エアーを吹出す構造のテーパ孔型のエアー吹出し冷却部
であり、 前記エアー吹出し冷却部のうち初段と最終段を除いた中
間段の各エアー吹出し冷却部は、前記光ファイバが通過
する冷却筒部の光ファイバ貫通孔がストレート孔となっ
ていて、該ストレート孔内にその周方向からエアーを吹
出す構造のストレート孔型のエアー吹出し冷却部である
ことを特徴とする光ファイバ冷却装置。(1) In an optical fiber cooling device that cools an optical fiber spun from an optical fiber preform in air blowing cooling sections arranged in multiple stages in the direction of movement of the optical fiber, the air in the first and last stages of each of the air blowing cooling sections is The air blowing cooling section is a tapered hole type air blowing cooling section having a structure in which the optical fiber through hole of the cooling cylinder part through which the optical fiber passes is a tapered hole, and air is blown into the tapered hole from the circumferential direction. In each of the air blowing cooling units in the intermediate stage except for the first stage and the final stage, the optical fiber through hole of the cooling cylinder part through which the optical fiber passes is a straight hole, and An optical fiber cooling device characterized by having a straight hole type air blowing cooling section having a structure that blows air into the straight hole from the circumferential direction thereof.
それぞれ冷却筒部が独立した構造になっていることを特
徴とする請求項（１）に記載の光ファイバ冷却装置。(2) Each straight hole type air blowing cooling section is
2. The optical fiber cooling device according to claim 1, wherein each of the cooling tube portions has an independent structure.
各冷却筒部が相互間で連続した構造になっていることを
特徴とする請求項（１）に記載の光ファイバ冷却装置。(3) Each of the straight hole type air blowing cooling parts is
2. The optical fiber cooling device according to claim 1, wherein each of the cooling cylinder portions has a continuous structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303905A JP2807335B2 (en) | 1990-11-13 | 1990-11-13 | Optical fiber cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303905A JP2807335B2 (en) | 1990-11-13 | 1990-11-13 | Optical fiber cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04182331A true JPH04182331A (en) | 1992-06-29 |
| JP2807335B2 JP2807335B2 (en) | 1998-10-08 |
Family
ID=17926680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303905A Expired - Lifetime JP2807335B2 (en) | 1990-11-13 | 1990-11-13 | Optical fiber cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2807335B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068157A1 (en) * | 1999-05-10 | 2000-11-16 | Pirelli Cavi E Sistemi S.P.A. | Method and induction furnace for drawing large diameter preforms to optical fibres |
| EP1076045A2 (en) * | 1999-08-09 | 2001-02-14 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| JP2014231465A (en) * | 2013-05-30 | 2014-12-11 | 住友電気工業株式会社 | Apparatus and method for manufacturing glass fiber |
| JP2015535805A (en) * | 2012-10-04 | 2015-12-17 | コーニング インコーポレイテッド | Method and apparatus for cooling an optical fiber |
-
1990
- 1990-11-13 JP JP2303905A patent/JP2807335B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068157A1 (en) * | 1999-05-10 | 2000-11-16 | Pirelli Cavi E Sistemi S.P.A. | Method and induction furnace for drawing large diameter preforms to optical fibres |
| US7814767B2 (en) | 1999-05-10 | 2010-10-19 | Prysmian Cavi E Sistemi Energia S.R.L. | Method and induction furnace for drawing large diameter preforms to optical fibres |
| EP1076045A2 (en) * | 1999-08-09 | 2001-02-14 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| EP1076045A3 (en) * | 1999-08-09 | 2001-05-16 | Lucent Technologies Inc. | Apparatus for cooling an optical fibre drawn from a preform |
| JP2015535805A (en) * | 2012-10-04 | 2015-12-17 | コーニング インコーポレイテッド | Method and apparatus for cooling an optical fiber |
| JP2014231465A (en) * | 2013-05-30 | 2014-12-11 | 住友電気工業株式会社 | Apparatus and method for manufacturing glass fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2807335B2 (en) | 1998-10-08 |
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