Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for producing glass bar

A manufacturing method and technology for glass strips, applied in glass manufacturing equipment, glass molding, glass remolding, etc., can solve the problems of increased manufacturing cost, time and labor for grinding, grinding, etc., to suppress deflection , excellent flatness effect

Active Publication Date: 2012-05-23
FURUKAWA ELECTRIC CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the plate glass with high flatness is completed only by grinding and grinding, the time and labor for grinding and grinding are spent, and the manufacturing cost increases.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing glass bar
  • Process for producing glass bar
  • Process for producing glass bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0021] figure 1 It is a flowchart which shows the manufacturing process of the manufacturing method of the glass rod which concerns on embodiment of this invention. figure 1 Among them, first, a sheet glass (float sheet glass) manufactured by the float method is prepared (step S101). That is, the floating line is filled with molten metallic tin, and the molten glass is floated on the surface to form a float sheet glass. This float method is a method capable of mass-producing large-area plate glass stably and at low cost. In the manufacturing process of this float plate glass, since the lower surface (bottom surface) of the plate glass is in contact with molten tin, the metal component penetrates into the surface layer as ions on the bottom surface, forming a reducing heterogeneous layer containing metal ions. It is known that the thickness of the reducing heterogeneous layer containing metal such as tin varies depending on the glass composition, and is about several μm to 10...

Embodiment 1～21

[0030] (Examples 1 to 21, comparative example)

[0031] As an example of the present invention, a float plate glass (Tempac Flot (registered trademark) manufactured by Shiyotsuto Co., Ltd.) made of borosilicate glass was prepared. figure 1 The manufacturing process of raw material processing, cleaning and drying, removal of reducing heterogeneous layer, cleaning and drying processes to produce a base material plate glass with a plate width of 328mm, a thickness of 5mm, and a length of about 1.5m, which is heated and stretched to produce a wide 25mm, 0.38mm thick glass strip. It should be noted that the method for removing the reducing heterogeneous layer used here is as follows.

[0032] (removal of reducing heterogeneous layer by etching)

[0033] Fill the corrosion solution tank with the corrosion solution, and immerse the base plate glass in the corrosion solution for a predetermined period of time. A mixture of hydrofluoric acid and sulfuric acid, or a mixture of hydrof...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for producing a glass bar which comprises: a reducing-heterogeneous-layer removal step in which at least part of a reducing heterogeneous layer present on a surface of a plate glass produced by the float process is removed; and a heating drawing step in which the plate glass from which at least part of the reducing heterogeneous layer has been removed is softened by heating in a heatingoven and is drawn to a given thickness to form a glass bar. By the process, a thin rod-shaped glass bar having excellent surface smoothness can be produced even through the heating / drawing of a plateglass produced by the float process.

Description

technical field [0001] The present invention relates to a method of manufacturing a glass rod by heating and stretching a thick-walled plate glass to produce a thin-walled rod-shaped glass rod. Background technique [0002] At present, it is most important for substrates of semiconductor elements, spacers used in field-effect type flat panel displays, and plate glasses used in magnetic disk substrates to have good flatness and surface roughness. However, the flatness of the produced plate glass is poor when the thin plate glass is produced by the float method or the forming method generally used as the production method of the plate glass at present. Flatness, it is necessary to grind or grind the surface of the plate glass by a considerable amount. Therefore, there is a problem that the surface roughness of the plate glass after grinding is extremely poor. [0003] In order to solve this problem, the plate glass after grinding is usually polished twice, and the surface ro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03B23/037C03C15/00
CPCC03C2218/33C03B23/037C03C2217/72C03C17/00
Inventor 铃木哲雄立石俊章熊田哲哉
Owner FURUKAWA ELECTRIC CO LTD