CN-121990755-A - Glass article manufacturing apparatus and glass article manufacturing method

Abstract

The present invention relates to a glass article manufacturing apparatus and a glass article manufacturing method. The invention provides a technology capable of manufacturing a desired glass article even if glass fragments generated by breakage of a glass observation window fall into a glass article forming device. In a glass article manufacturing apparatus in which a glass raw material is melted to obtain molten glass, the molten glass is formed into a glass article, and the glass article is cooled slowly, the glass article manufacturing apparatus is provided with a glass-made observation window capable of observing the inside of the glass article manufacturing apparatus from the outside of the glass article manufacturing apparatus, and the glass-made observation window has a glass composition within the same range as that of the glass composition of the glass article.

Inventors

• YAMADA NAOTO
• Oomura Yoshitoyo

Assignees

• ＡＧＣ株式会社

Dates

Publication Date

20260508

Application Date

20251105

Priority Date

20241108

Claims (13)

1. 1. In a glass article manufacturing apparatus for melting a glass raw material to obtain molten glass, forming the molten glass into a glass article, and slowly cooling the glass article, The glass article manufacturing apparatus includes a glass observation window capable of observing the inside of the glass article manufacturing apparatus from the outside of the glass article manufacturing apparatus, The glass window has a glass composition within the same range as that of the glass composition of the glass article.
2. 2. The apparatus for producing a glass article according to claim 1, wherein the glass composition of the glass article contains SiO 2 , al 2 O 3 , B 2 O 3 , mgO, caO, srO, and MgO, caO, and SrO in total in a predetermined range, The glass composition of the glass observation window also contains the amount of SiO 2 , the amount of Al 2 O 3 , the amount of B 2 O 3 , the amount of MgO, the amount of CaO, the amount of SrO, and the total amount of MgO, caO, and SrO, respectively, within the same range as the predetermined range.
3. 3. The glass article manufacturing apparatus of claim 2, wherein the glass article and the glass viewing window each comprise alkali-free glass.
4. 4. The glass article manufacturing apparatus of claim 2, wherein the glass article has a glass composition comprising, in mole percent on an oxide basis: SiO 2 is 65-70%, Al 2 O 3 from 9% to 16%, More than 6% and less than 12% of B 2 O 3 , MgO is 0% to 6%, CaO is 0% to 7%, 1 To 9 percent of SrO, The total of MgO, caO and SrO is 7% to 18%.
5. 5. The glass article manufacturing apparatus of claim 2, wherein the glass article has a glass composition comprising, in mole percent on an oxide basis: SiO 2 is 63-74%, Al 2 O 3 from 12% to 14%, B 2 O 3 : more than 1.5 percent and less than or equal to 5 percent, MgO is 5.5-13%, CaO:1.5% or more less than 12 percent, SrO:1.5% to 9%, BaO is 0% to 1%, MgO, caO, srO and BaO are 15.5% to 21%.
6. 6. The glass article manufacturing apparatus of claim 4 or 5, wherein the glass article and the glass viewing window are each substantially free of BaO.
7. 7. The glass article manufacturing apparatus of claim 4 or 5, wherein the glass article and the glass viewing window are each substantially free of PbO, as 2 O 3 , and Sb 2 O 3 .
8. 8. The glass article manufacturing apparatus according to claim 1 or 2, wherein the glass-made viewing window has a glass composition substantially identical to a glass composition of the glass article.
9. 9. The glass article manufacturing apparatus according to claim 1 or 2, wherein the glass-made viewing window is a fixed window that is tightly fitted at an opening of a wall-like member of the glass article manufacturing apparatus.
10. 10. A method for manufacturing a glass article by using a glass article manufacturing apparatus having a glass observation window capable of observing the inside of the apparatus from the outside of the apparatus, wherein, A range of desired glass compositions for the glass article to be manufactured is determined, Preparing a glass-made observation window having a glass composition within the same range as the determined glass composition range of the glass article, The glass window is mounted on the glass article manufacturing device, thereby obtaining the glass article manufacturing device with the window, In the glass article manufacturing apparatus with an observation window, a glass raw material is melted to obtain molten glass, and the molten glass is formed into a glass article and is cooled slowly, thereby manufacturing the glass article.
11. 11. The glass article manufacturing method according to claim 10, wherein the step of preparing the glass-made viewing window comprises the steps of: multiple glass-made viewing windows having different glass compositions were prepared in advance, A glass-made window having a glass composition within the same range as the glass composition range of the glass article to be manufactured is selected from the plurality of glass-made windows.
12. 12. The glass article manufacturing method according to claim 10, wherein the step of preparing the glass-made viewing window comprises the steps of: the glass article manufacturing device is used for manufacturing glass article test products, And manufacturing a glass observation window from the glass article test product.
13. 13. A method for manufacturing a glass article by using a glass article manufacturing apparatus having a glass observation window capable of observing the inside of the apparatus from the outside of the apparatus, wherein, A range of desired glass compositions for the glass article to be manufactured is determined, Preparing a glass-made observation window having a glass composition within the same range as the determined glass composition range of the glass article, The glass window is mounted on the glass article manufacturing device, thereby obtaining the glass article manufacturing device with the window, In the glass article manufacturing apparatus with a viewing window, a glass article is manufactured through a series of steps including a step of melting a glass raw material, forming a molten glass obtained by the melting into a glass article, and slowly cooling the glass article, The series of procedures is repeated a plurality of times, The steps between the series of steps and the following series of steps include: at least a part of fragments generated by the breakage of the observation window enter the glass article manufacturing apparatus.

Description

Glass article manufacturing apparatus and glass article manufacturing method Technical Field The present disclosure relates to a glass article manufacturing apparatus and a glass article manufacturing method. Background There is known a glass article manufacturing apparatus in which a glass raw material is melted, and a molten glass obtained by the melting is formed into a glass article, and is cooled slowly, thereby manufacturing a glass article such as a flat glass (for example, patent document 1). Prior art literature Patent literature Patent document 1 International publication No. 2023/149411 Disclosure of Invention Problems to be solved by the invention In some glass article manufacturing apparatuses, a glass observation window for an operator to observe the inside of the apparatus from the outside of the apparatus is attached. In such a glass article manufacturing apparatus, when maintenance of the apparatus is performed, a glass observation window is generally broken, and maintenance tools are inserted from the formed opening to perform work. However, when the glass window is broken, fragments of glass constituting the window may enter the glass article manufacturing apparatus, and the fragments may be mixed into glass raw materials or molten glass. However, in the conventional glass article manufacturing apparatus, there is no consideration about the composition of glass of the glass observation window, and therefore, when glass fragments from the glass observation window are mixed into the glass article, the glass composition of the glass article may change, and a glass article having desired characteristics may not be obtained. One embodiment of the present disclosure provides a technique capable of manufacturing a desired glass article even if glass fragments generated by breakage of a glass window fall into the interior of a glass article forming apparatus. Means for solving the problems A glass article manufacturing apparatus according to one aspect of the present disclosure is a glass article manufacturing apparatus in which a glass raw material is melted to obtain molten glass, the molten glass is formed into a glass article, and the glass article is cooled down slowly, wherein the glass article manufacturing apparatus is provided with a glass-made observation window capable of observing an inside of the glass article manufacturing apparatus from an outside of the glass article manufacturing apparatus, the glass-made observation window having a glass composition within a range identical to a glass composition range of the glass article. Effects of the invention According to one aspect of the present disclosure, even if glass fragments generated by breakage of a glass window fall into the interior of a glass article forming apparatus, a desired glass article can be manufactured. Drawings Fig. 1 is a schematic view of a glass article manufacturing apparatus according to an embodiment of the present disclosure. Fig. 2 is a schematic enlarged view of a glass window from the outside. Fig. 3 is a flow chart of a method of manufacturing a glass article according to one embodiment of the present disclosure. Description of the reference numerals 10. Melting device 20. Clarifying device 30. Forming device 40. Slow cooling device 100. Glass article manufacturing apparatus Wd observation window Detailed Description Hereinafter, embodiments of the present disclosure will be described in detail. In the description, reference is also made to the drawings, and in the drawings, the same or corresponding components may be denoted by the same reference numerals, and description thereof may be omitted. < Apparatus for producing glass article > Fig. 1 schematically illustrates a glass article manufacturing apparatus 100 according to an embodiment of the present disclosure. The glass article manufacturing apparatus 100 is an apparatus that melts a glass raw material, forms molten glass obtained by the melting into a glass article, and slowly cools the glass article. More specifically, the glass article manufacturing apparatus 100 includes at least the melting apparatus 10, the forming apparatus 30, and the slow cooling apparatus 40. As shown in fig. 1, the glass article manufacturing apparatus 100 may include a fining device 20 for fining molten glass between the melting device 10 and the forming device 30. In FIG. 1, melting apparatus 10, fining apparatus 20 and forming apparatus 30 are shown in partial cutaway view for ease of understanding of their function. The melting device 10 melts the glass raw material by heating, thereby manufacturing molten glass Gm. The glass raw material to be melted may be prepared by mixing a plurality of materials. The glass raw material may also contain cullet in order to recycle the glass. The glass raw material may be a powder raw material or a granulated raw material obtained by granulating the powder raw material. In the example shown in fig. 1, the melting apparatus 10 inclu