JPS56120530A - Bulging method for quartz pipe - Google Patents

Bulging method for quartz pipe

Info

Publication number
JPS56120530A
JPS56120530A JP2033180A JP2033180A JPS56120530A JP S56120530 A JPS56120530 A JP S56120530A JP 2033180 A JP2033180 A JP 2033180A JP 2033180 A JP2033180 A JP 2033180A JP S56120530 A JPS56120530 A JP S56120530A
Authority
JP
Japan
Prior art keywords
pipe
dies
upright
bulge
high frequency
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
JP2033180A
Other languages
Japanese (ja)
Other versions
JPS5925740B2 (en
Inventor
Akio Kawana
Takao Shioda
Shinji Araki
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.)
Fujikura Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujikura Ltd
Nippon Telegraph and Telephone Corp
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 Fujikura Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujikura Ltd
Priority to JP2033180A priority Critical patent/JPS5925740B2/en
Publication of JPS56120530A publication Critical patent/JPS56120530A/en
Publication of JPS5925740B2 publication Critical patent/JPS5925740B2/en
Expired legal-status Critical Current

Links

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
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01254—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing by expanding radially, e.g. by forcing a mandrel through or axial pressing a tube or rod

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)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To uniformly bulge an upright starting quartz pipe by coaxially placing cylindrical dies around the pipe to apply an internal pressure as well as heat soften the pipe in the manufacture of a base material for a single-mode fiber. CONSTITUTION:Cylindrical dies 32 made of heat resistant material is supported upright in body 34 of high frequency furnace 30, and starting quartz pipe 14 is placed in dies 32 coaxially and upright. Pipe 14 is softened by heating dies 32 to about 1,550 deg.C with high frequency coil 42, and an internal pressure is applied to pipe 14 to bulge pipe 14 until it contacts with dies 32. After cooling pipe 14 with gaseous nitrogen or the like spouted from holes 46, glass is deposited on pipe 14 by an ordinary method to obtain a base material for a single-mode fiber with little change in the outside diameter and superior characteristics.
JP2033180A 1980-02-20 1980-02-20 Manufacturing method of optical fiber base material Expired JPS5925740B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2033180A JPS5925740B2 (en) 1980-02-20 1980-02-20 Manufacturing method of optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2033180A JPS5925740B2 (en) 1980-02-20 1980-02-20 Manufacturing method of optical fiber base material

Publications (2)

Publication Number Publication Date
JPS56120530A true JPS56120530A (en) 1981-09-21
JPS5925740B2 JPS5925740B2 (en) 1984-06-20

Family

ID=12024149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2033180A Expired JPS5925740B2 (en) 1980-02-20 1980-02-20 Manufacturing method of optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5925740B2 (en)

Also Published As

Publication number Publication date
JPS5925740B2 (en) 1984-06-20

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