Glass production method and glass production apparatus

A glass manufacturing and glass technology, which is applied in the fields of glass manufacturing and glass manufacturing devices, can solve problems such as defects on the surface of glass ribbons, and achieve the effects of suppressing defects and improving yield

Inactive Publication Date: 2015-07-29
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the glass ribbon is conveyed in this way, when there are irregularities caused by blemishes, deposits, etc. on the surface of the conveying roller, flaws may occur on the surface of the glass ribbon that is in contact with the conveying roller.

Method used

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  • Glass production method and glass production apparatus
  • Glass production method and glass production apparatus
  • Glass production method and glass production apparatus

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0114] First, a roll base material made of stainless steel (equivalent to SUS310, for high temperature) containing about 25% by mass of Cr and about 20% by mass of Ni was prepared.

[0115] In order to be used in the test described later, the shape of the base material of the roller is formed into a disc shape with an outer diameter of 150mm×a thickness of 20mm, and the radial cross-section of the outer peripheral surface of the roller is set as a curved surface that is convex to the outside. The radius of curvature of the curved surface Set to 50mm. The outer peripheral surface of the roll was ground by hand grinding using water-resistant paper. The surface roughness (Ra) after polishing was 0.5 μm.

[0116] The following flaw evaluation test was performed using this roller.

experiment example 2

[0118] In Experimental Example 2, similar to Experimental Example 1, the outer peripheral surface of the roller was ground by hand grinding using a roll base material made of stainless steel containing about 25% by mass Cr and about 20% by mass Ni. The surface roughness (Ra) after polishing was 0.5 μm.

[0119] Next, the above-mentioned roll was heated to 300° C., and a 10 mass % sodium sulfate aqueous solution dissolved in distilled water was sprayed on the outer peripheral surface of the roll at 20 cc / min. Since the temperature of the roll is 100°C or higher, the water in the sprayed aqueous solution evaporates and only sodium sulfate remains on the outer peripheral surface to form a film. The film of sodium sulfate formed on the outer peripheral surface of the roller was measured with a high-frequency electromagnetic film thickness meter (manufactured by Ketuto Scientific Research Institute Co., Ltd.), and the thickness was 100 μm.

[0120] The following flaw evaluation te...

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Abstract

[Solution] Provided is a glass production method characterized by having: a forming step in which a glass ribbon is formed from molten glass by a glass forming means; and a transport step in which the glass ribbon slowly cools to or below the strain point temperature of the glass while being transported by a transport roll, wherein the transport step includes a buffer layer formation step in which a solution containing an inorganic salt is sprayed directly onto at least a portion of the transport roll, whereupon the solution deposited onto the transport roll dries out and forms a buffer layer of the inorganic salt.

Description

technical field [0001] The present invention relates to a glass manufacturing method and a glass manufacturing device. Background technique [0002] In the manufacturing method of flat glass, in order to prevent cracks and flatness reduction caused by sharp shrinkage, the glass ribbon formed from molten glass by float method or the like is conveyed on conveying rollers in a slow cooling furnace and slowly method of cooling. [0003] When the glass ribbon is conveyed in this way, if there are irregularities due to flaws, deposits, etc. on the surface of the conveyance roller, flaws may be generated on the surface of the glass ribbon in contact with the conveyance roller. [0004] Therefore, conventionally, a method of introducing SO into the slow cooling furnace 2 Gas (sulfur dioxide, sulfurous acid gas), or blow SO to the surface of the glass ribbon facing the conveying roller 2 gas, so that the Na and SO on the surface of the high-temperature glass ribbon 2 reaction, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B18/02C03B25/08
CPCC03B35/18C03B18/02C03C17/002C03B25/08C03B35/164C03B35/167C03B35/181C03B40/04Y02P40/57
Inventor 石川泰成松冈瑞树谷井史朗
Owner AGC INC
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