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Method for preparing glass stick

A technology for glass rods and glass ingots, which is applied in the field of preparing glass rods, and can solve problems such as poor economy and moisture removal

Inactive Publication Date: 2004-10-20
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has the problem of requiring additional solvent and is therefore less economical
In addition, it is quite difficult to remove moisture from cleaned surfaces, thus creating problems as described above

Method used

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  • Method for preparing glass stick
  • Method for preparing glass stick
  • Method for preparing glass stick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Using an external cylindrical grinder, the fused silica glass substrate was ground into a cylinder having an outer diameter of 130 mm by using a grinding stone of fixed grain size #200, thereby providing a cylindrical glass substrate 12 .

[0042] Next, the glass substrate 12 is placed on figure 1 Cleaning equipment A of the type shown. The cleaning apparatus A has 8 nozzles 26 aimed at the glass substrate, and the distance between them is set at 100 mm. The steam nozzle unit 26 was reciprocated 10 times at a moving speed of 2500 mm / min, and steam of 0.4 MPa was sprayed from the nozzle unit to the glass substrate 12 to clean the surface thereof. The consumption of steam is 42kg / hour.

[0043] Then, clean air was supplied to the cleaning device A from the air inlet 14 for 2 minutes. The supply of clean air is controlled by the control valve 20 , the air is passed into the apparatus A through the filter 18 , and after drying the surface of the glass substrate 12 , is d...

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Abstract

A method for fabricating a smaller-sized glass rod by elongation of a glass matrix comprises providing a glass matrix, applying steam to surfaces of said glass matrix, and heating the thus applied glass matrix to soften the glass matrix to an extent sufficient for subsequent elongation. The softened glass matrix is elongated to provide a glass rod having a substantially dirt-free, clean surface.

Description

technical field [0001] The present invention relates to a method for preparing glass rods from glass preforms or substrates for optical fibers to provide smaller sized glass rods. Background technique [0002] In order to obtain an optical fiber with good optical characteristics and high mechanical strength, it is necessary to prepare a glass rod for optical fiber whose surface is clean and smooth and have high roundness, and draw the glass rod into an optical fiber. [0003] In order to prepare such a glass rod, the usual method is to machine the glass substrate into a perfectly round cylinder by means of an external cylindrical grinder, soften the cylinder by applying heat, and stretch the softened cylinder into a highly round glass Great. [0004] In general, it is known that when brittle materials such as vitreous or glassy materials are ground, the surface roughness results in microcracks contained therein. For the grinding of brittle materials, water-soluble grinding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/04B08B3/02C03B23/047C03B37/012C03B37/025C03C23/00
CPCC03C23/007C03B37/0124C03B23/047C03C23/0075B08B2230/01B08B3/024C03B37/025
Inventor 山村和市
Owner SHIN ETSU CHEM IND CO LTD
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