Method for manufacturing glass substrate and device for manufacturing glass substrate
A glass substrate and manufacturing method technology, applied in glass manufacturing equipment, glass molding, glass molding and other directions, can solve the problems of falling, the increase of the risk of shaft deformation, etc., and achieve the effect of preventing deformation
Active Publication Date: 2015-09-30
AVANSTRATE INC
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Problems solved by technology
Usually, the rotating shaft that rotates the roll is made of metal, so the strength will decrease as t
Method used
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[0095] [Example]
[0096] Hereinafter, the present invention will be explained more specifically through examples.
[0097] Set the rotation axis of the conveying part in the slow cooling furnace as the above Figure 5 The construction shown. The length of the insulating material in the longitudinal direction of the rotating shaft from the furnace wall is set to 0.26m, the temperature in the slow cooling furnace is set to 800°C, and the temperature outside the slow cooling furnace is set to 30°C. The heat conduction of the rotating shaft The rate is assumed to be SUS304 and set the thermal conductivity W / (m·K) = 0.013*temperature (℃)+15, and the thermal conductivity of the insulation material is set to 0.1W / (m·K) to calculate the rotation Allowable stress of the shaft.
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The invention relates to a method for manufacturing a glass substrate and a device for manufacturing a glass substrate. The method for manufacturing the glass substrate can represent designed temperature distribution with good precision, and can enable stress generated by a rotating shaft of a roller that carrier thin sheet glass to reduce. The device for manufacturing the glass substrate has: a forming furnace having a forming body that enables molten glass to overflow to form continuous thin sheet glass; and a slow cooling furnace which clamps the thin sheet glass to carry downwards and performs slow cooling at the same time. The slow cooling furnace includes: a wall which partitions inside of the furnace for carrying the thin sheet glass and outside of the furnace of external space; a rotating shaft which penetrates through the wall; a roller which is arranged on a front end part of the rotating shaft and supported by a cantilever of the rotating shaft; and a temperature adjusting mechanism which performs adjustment in the mode of reducing a temperature gradient of the rotating shaft in a length direction.
Description
technical field [0001] The present invention relates to a manufacturing method and manufacturing apparatus of a glass substrate for manufacturing a glass substrate. Background technique [0002] Glass substrates used for flat panel displays such as liquid crystal displays and plasma displays (hereinafter referred to as “glass substrates for FPD (Flat Panel Display)”) use glass plates as thin as 0.5 to 0.7 mm in thickness, for example. Regarding the glass substrate for FPD, for example, the size is 300×400 mm in the first generation, and 2850×3050 mm in the tenth generation. [0003] When manufacturing the glass substrate for FPDs, the overflow down-draw method may be used. The overflow down-draw method includes the steps of forming a sheet of glass (sheet glass) under a forming body by allowing molten glass to overflow (overflow) from the upper portion of the forming body in a forming furnace; Cool slowly in a cold oven. In the slow cooling furnace, the glass sheet is dra...
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Login to view more IPC IPC(8): C03B17/06
CPCC03B17/067
Inventor 樋渡博一
Owner AVANSTRATE INC
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