JP2013040084A - 光ファイバ線引き炉 - Google Patents
光ファイバ線引き炉 Download PDFInfo
- Publication number
- JP2013040084A JP2013040084A JP2011179414A JP2011179414A JP2013040084A JP 2013040084 A JP2013040084 A JP 2013040084A JP 2011179414 A JP2011179414 A JP 2011179414A JP 2011179414 A JP2011179414 A JP 2011179414A JP 2013040084 A JP2013040084 A JP 2013040084A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- core tube
- diameter
- furnace
- reduced
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 57
- 238000012681 fiber drawing Methods 0.000 title claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000004071 soot Substances 0.000 abstract description 12
- 230000017525 heat dissipation Effects 0.000 abstract description 11
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 241001520881 Sporobolus Species 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Images
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
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
- C03B37/02727—Annealing or re-heating
-
- 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
- C03B2205/90—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)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
【解決手段】光ファイバ母材2を炉心管3内に挿入し、炉心管3の外側から加熱装置4により加熱して光ファイバ母材を溶融して光ファイバを線引きする線引き炉であって、炉心管3は、加熱装置の中央位置より下方で内径が縮小され、続いて拡大される縮径部3aを備えている。
【選択図】図1
Description
円筒状ヒータ4による光ファイバ母材2の加熱は、円筒状ヒータ4により炉心管3が加熱され、その熱が炉心管3の内壁面からの放射熱(輻射熱)と、炉心管内の不活性ガスを媒体とした伝導熱により行われる。この場合、炉心管3の温度分布は、円筒状ヒータ4の中央位置(X−Xライン)の領域が最も高温となり、この領域を中心に光ファイバ母材が溶融される。
図3(A)において、炉心管3の縮径部3aは、縮径段部3bと拡径段部3cを有し、その縮径内径Dは、小さいほど熱放散を抑制することができる。基本的には溶融垂下する光ファイバが接触しない径を有していればよいが、光ファイバ母材2の線引き開始時には、落とし種と呼ばれるガラスの塊を溶融落下させる必要があるため、ある程度の大きさの内径は必要である。落とし種の大きさは、光ファイバ母材の太さや形状(下端部を予め円錐状に加工したもの)等により異なるが、5〜30mm程度の径になる。したがって、使用する線引き用光ファイバ母材や熱放散性を考慮すると、縮径内径Dは、20〜100mm、好ましくは20〜50mm程度とされる。
また、図3(A)及び(B)は、炉心管3の全長を一体に形成した例で説明したが、縮径部3a以下を分割して形成してもよい。この場合、消耗し易い部分を交換することで、コストを抑制することができる。
Claims (1)
- 光ファイバ母材を炉心管内に挿入し、炉心管の外側から加熱装置により加熱して前記光ファイバ母材を溶融して光ファイバを線引きする線引き炉であって、
前記炉心管は、前記加熱装置の中央位置より下方で内径が縮小され、続いて拡大される縮径部を備えていることを特徴とする光ファイバ線引き炉。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011179414A JP5757192B2 (ja) | 2011-08-19 | 2011-08-19 | 光ファイバ線引き炉 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011179414A JP5757192B2 (ja) | 2011-08-19 | 2011-08-19 | 光ファイバ線引き炉 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013040084A true JP2013040084A (ja) | 2013-02-28 |
JP5757192B2 JP5757192B2 (ja) | 2015-07-29 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011179414A Active JP5757192B2 (ja) | 2011-08-19 | 2011-08-19 | 光ファイバ線引き炉 |
Country Status (1)
Country | Link |
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JP (1) | JP5757192B2 (ja) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02199040A (ja) * | 1989-01-30 | 1990-08-07 | Furukawa Electric Co Ltd:The | 光ファイバ線引炉 |
-
2011
- 2011-08-19 JP JP2011179414A patent/JP5757192B2/ja active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02199040A (ja) * | 1989-01-30 | 1990-08-07 | Furukawa Electric Co Ltd:The | 光ファイバ線引炉 |
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