JPS55144441A - Producing light transmitting member and crucible for producing thereof - Google Patents

Producing light transmitting member and crucible for producing thereof

Info

Publication number
JPS55144441A
JPS55144441A JP5371679A JP5371679A JPS55144441A JP S55144441 A JPS55144441 A JP S55144441A JP 5371679 A JP5371679 A JP 5371679A JP 5371679 A JP5371679 A JP 5371679A JP S55144441 A JPS55144441 A JP S55144441A
Authority
JP
Japan
Prior art keywords
crucible
furnace
heated
glass
oxygen
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
Application number
JP5371679A
Other languages
Japanese (ja)
Other versions
JPS5742575B2 (en
Inventor
Masao Kawashima
Hisanao Okada
Fumi Kikuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5371679A priority Critical patent/JPS55144441A/en
Publication of JPS55144441A publication Critical patent/JPS55144441A/en
Publication of JPS5742575B2 publication Critical patent/JPS5742575B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • 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
    • C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
    • C03B37/023—Fibres composed of different sorts of glass, e.g. glass optical fibres, made by the double crucible technique
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/033—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by using resistance heaters above or in the glass bath, i.e. by indirect resistance heating
    • C03B5/0334—Pot furnaces; Core furnaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To provide high-quality, optical-transmitting glass member having little light-transmission loss by a method wherein glass composition is clarified by melting and bubbling it in inert gas atmosphere and drawing it from small hole at the bottom of crucible while keeping a specified temperature. CONSTITUTION:Atmosphere 54 within furnace enclosed by furnace body 40, 42 and lid 48 is filled with inert gas admitted from 55 and is maintained positive pressure against outside atmosphere. Glass composition is contained in multiple-layer crucible and heated by oxygen gas which is heated in process of melting and clarification and by furnace temperature at the bottom of the furnace. The oxygen gas is jetted into internal and external crucible through many holes 58 installed to nozzle 57 so as to effect bubbling of glass material. Heater 60 for nozzle area is heated to raise temperature in the areas of nozzles 26 and 38 so that molten glass is decreased in viscosity in these areas. Then, oxygen inlet pipe 56 and oxygen jet nozzle 57 are removed downwardly so that optical transmitting member is drawn downward.
JP5371679A 1979-05-01 1979-05-01 Producing light transmitting member and crucible for producing thereof Granted JPS55144441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5371679A JPS55144441A (en) 1979-05-01 1979-05-01 Producing light transmitting member and crucible for producing thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5371679A JPS55144441A (en) 1979-05-01 1979-05-01 Producing light transmitting member and crucible for producing thereof

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP5172082A Division JPS5918329B2 (en) 1982-03-29 1982-03-29 Crucible for manufacturing optical transmission bodies

Publications (2)

Publication Number Publication Date
JPS55144441A true JPS55144441A (en) 1980-11-11
JPS5742575B2 JPS5742575B2 (en) 1982-09-09

Family

ID=12950546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5371679A Granted JPS55144441A (en) 1979-05-01 1979-05-01 Producing light transmitting member and crucible for producing thereof

Country Status (1)

Country Link
JP (1) JPS55144441A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59132748A (en) * 1983-01-17 1984-07-30 Nippon Denso Co Ltd Motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116054A (en) * 1974-07-31 1976-02-09 Hitachi Ltd Tasokozoojusuru fuaibaano renzokuseizohoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116054A (en) * 1974-07-31 1976-02-09 Hitachi Ltd Tasokozoojusuru fuaibaano renzokuseizohoho

Also Published As

Publication number Publication date
JPS5742575B2 (en) 1982-09-09

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