Method for manufacturing glass material
US-2015344349-A1 · Dec 3, 2015 · US
Method for producing glass material, device for producing glass material, and glass material
US2018072605A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018072605-A1 |
| Application number | US-201515565713-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 10, 2015 |
| Priority date | Jun 10, 2015 |
| Publication date | Mar 15, 2018 |
| Grant date | — |
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- Title
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Abstract
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Provided is a method that enables a crystal-free glass material to be stably produced by a containerless levitation technique. A glass material 30 has a first surface 31 facing a forming surface 10 a and a second surface 32 located on a side opposite to the forming surface 10 a . The first surface 31 includes a central portion 31 a and a peripheral portion 31 b located outside of the central portion 31 a . Gas is jetted through a gas jet hole at a flow velocity and a flow volume at which a glass material satisfying R 2 <R 3 <R 1 is formed where R 1 represents a radius of curvature of the central portion 31 a , R 2 represents a radius of curvature of the peripheral portion 31 b , and R 3 represents a radius of curvature of the second surface 32.
First claim
Opening claim text (preview).
1 . A method for producing a glass material, the method comprising the step of heating a glass raw material to melting with the glass raw material held levitated above a forming surface of a forming die by jetting gas through a gas jet hole opening on the forming surface, thus obtaining a molten glass, and then cooling the molten glass to obtain a glass material, wherein the glass material has a first surface facing the forming surface and a second surface located on a side opposite to the forming surface, the first surface includes a central portion and a peripheral portion located outside of the central portion, and the gas is jetted through the gas jet hole at a flow velocity and a flow volume at which a glass material satisfying R 2 <R 3 <R 1 is formed where R 1 represents a radius of curvature of the central portion, R 2 represents a radius of curvature of the peripheral portion, and R 3 represents a radius of curvature of the second surface. 2 . A device for producing a glass material by heating a glass raw material to melting with the glass raw material held levitated above a forming surface of a forming die by jetting gas through a gas jet hole opening on the forming surface, thus obtaining a molten glass, and then cooling the molten glass, wherein the glass material has a first surface facing the forming surface and a second surface located on a side opposite to the forming surface, the first surface includes a central portion and a peripheral portion located outside of the central portion, and the gas is jetted through the gas jet hole at a flow velocity and a flow volume at which a glass material satisfying R 2 <R 3 <R 1 is formed where R 1 represents a radius of curvature of the central portion, R 2 represents a radius of curvature of the peripheral portion, and R 3 represents a radius of curvature of the second surface. 3 . A glass material produced by heating a glass raw material to melting with the glass raw material held levitated above a forming surface of a forming die by jetting gas through a gas jet hole opening on the forming surface, thus obtaining a molten glass, and then cooling the molten glass, wherein the glass material has a first surface and a second surface located on a side opposite to the first surface, the first surface includes a central portion and a peripheral portion located outside of the central portion, and R 2 <R 3 <R 1 is satisfied where R 1 represents a radius of curvature of the central portion, R 2 represents a radius of curvature of the peripheral portion, and R 3 represents a radius of curvature of the second surface.
Assignees
Inventors
Classifications
using gas · CPC title
- C03B19/1005Primary
Forming solid beads (chemical aspects C03C12/00) · CPC title
by hot-pressing powders · CPC title
Heating the glass (C03B5/02, C03B5/18, C03B5/225 take precedence) · CPC title
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Frequently asked questions
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- What does patent US2018072605A1 cover?
- Provided is a method that enables a crystal-free glass material to be stably produced by a containerless levitation technique. A glass material 30 has a first surface 31 facing a forming surface 10 a and a second surface 32 located on a side opposite to the forming surface 10 a . The first surface 31 includes a central portion 31 a and a peripheral portion 31 b located ou…
- Who is the assignee on this patent?
- Nippon Electric Glass Co, Univ Tokyo
- What technology area does this patent fall under?
- Primary CPC classification C03B19/1005. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Mar 15 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).