KR-20260067367-A - Burner for preventing devitrification during glass manufacturing

Abstract

A glass forming system for controlling devitrification of glass is provided. The glass forming system includes a glass forming body, an edge director, and a burner. An edge director is positioned adjacent to the glass forming body and is configured to help control the shape of a glass ribbon formed by the molten glass flowing over the glass forming body by contacting the molten glass. A burner is configured to generate a flame that generates heat. A burner is positioned adjacent to the edge director so that heat from the flame increases the temperature of the edge director.

Inventors

• 코울즈, 커티스 리차드
• 리, 웨이 유
• 니시모토, 마이클 요시야
• 파워스, 데일 로버트

Assignees

• 코닝 인코포레이티드

Dates

Publication Date

20260512

Application Date

20240813

Priority Date

20230911

Claims (20)

1. As a glass forming system for controlling glass devitrification, Glass molded body; An edge director disposed adjacent to the glass molded body, wherein the edge director is configured to contact molten glass flowing over the glass molded body to help control the shape of a glass ribbon formed by the molten glass; and A glass forming system comprising a burner configured to generate a heat-generating flame, wherein the burner is positioned adjacent to an edge director such that the heat from the flame increases the temperature of the edge director.
2. In paragraph 1, A glass forming system in which heat from the flame increases the temperature of the molten glass at one or more locations.
3. In paragraph 1 or 2, A glass forming system that reduces the accumulation of devitrified glass adjacent to the edge director by heating at least one of the edge director or the molten glass.
4. In paragraph 1, A glass forming system configured such that the burner enables a change in at least one of the size of the flame or the direction of the flame.
5. In any one of paragraphs 1 through 4, A glass molding system comprising a root, wherein the burner is positioned at a height lower than the root and the edge director, and heat from the burner rises from the burner to heat the edge director.
6. In paragraph 5, A glass forming system in which the above-mentioned route includes a linear shape and at least a portion of the burner extends in a direction parallel to the above-mentioned route.
7. In paragraph 5, A glass forming system in which the above-mentioned route includes a linear shape and at least a portion of the burner extends in a direction perpendicular to the above-mentioned route.
8. In paragraph 1, The glass forming system is a glass forming system arranged to generate a chimney effect to cause an upward flow of air that assists in the heating of the edge director.
9. In paragraph 1, A glass forming system comprising a burner including a discharge port through which a flame is output from the burner.
10. In paragraph 1, A glass forming system in which the burner is positioned below the edge director, and heat from the flame generated by the burner rises to increase the temperature of the edge director.
11. In paragraph 1, A glass forming system in which the burner is configured to enable steering of the direction of the flame.
12. In Paragraph 11, A glass forming system configured such that the burner enables steering of the direction of the flame by mechanically moving the discharge port on the burner through which the flame is output from the burner.
13. In Paragraph 11, A glass forming system in which the burner is configured to enable steering of the direction of the flame without mechanically moving the discharge port on the burner from which the flame is output.
14. In Paragraph 13, A glass forming system wherein the burner comprises a discharge surface, the burner comprises a first oxygen supply channel and a second oxygen supply channel, the first oxygen supply channel and the second oxygen supply channel are configured to output oxygen to assist in the generation of the flame, and the burner is configured to supply a greater amount of oxygen in the first oxygen supply channel than in the second oxygen supply channel so that the flame is emitted at an angle not perpendicular to the discharge surface.
15. In Paragraph 14, A glass molding system in which a gas supply channel is disposed between the first oxygen supply channel and the second oxygen supply channel.
16. In any one of paragraphs 1 through 3, paragraphs 5 through 10, or paragraph 15, It also includes a temperature sensor, A glass forming system in which the flame is generated by the burner based on temperature data from the temperature sensor.
17. In Paragraph 16, A glass forming system, wherein the temperature sensor is configured to measure the temperature of the edge director.
18. In either Article 16 or Article 17, A glass forming system in which at least one of the size of the flame generated by the burner, the frequency at which the flame is generated by the burner, or the duration of the time at which the flame is generated depends on the temperature at the edge director.
19. In either Article 16 or Article 17, A glass forming system in which the flame is generated by the burner when the temperature at the edge director drops below a critical temperature.
20. In paragraph 16 or 17, processor; and It further includes memory containing computer-readable code, and when the computer-readable code is executed, the processor, Receiving first temperature data from the above temperature sensor; Determining whether the temperature of the edge director or the molten glass is below or above a threshold value; After the above decision, Causing the above flame to be generated in the above burner; Increase or decrease in the size of the flame generated in the burner; Changing the direction of the discharge port of the burner to target a location having a temperature below the above threshold; A glass forming system configured to cause at least one change in the direction of the flame generated in the burner for targeting the above location.

Description

Burner for preventing devitrification during glass manufacturing This application claims priority under Section 35, Paragraph 119 of the U.S. Patent Act to U.S. provisional application No. 63/581739 filed on September 11, 2023, the contents of which are incorporated herein by reference in their entirety. The example relates to the use of a burner to prevent devitrification growth during glass manufacturing, such as preventing devitrification growth on an edge director. For example, the growth of devit (devitated glass) during glass manufacturing on an edge director affects the stability of the glass ribbon containing the molten glass and often leads to a degradation in the quality of any glass product ultimately formed from the molten glass. An edge director is positioned at the opposite end of a molten glass ribbon adjacent to a glass mold. A portion of the edge director is located lower than the root of the glass mold, and this portion of the edge director often experiences a lower temperature compared to other portions of the edge director. As the temperature drops, the molten glass can fall below the liquidus temperature of the glass and consequently devitrate, forming devit. Current production tanks use radiant heater components to heat the edge director area, but these radiant heater components heat a relatively large area. In some cases, the heating capacity of the radiant heater components is insufficient to maintain the temperature of the edge director area above the liquidus temperature. The efficiency of the approach using radiant heater components is low because heat is used to increase the temperature of the entire edge director area rather than at a specific location on the edge director. Improvements are required regarding the aforementioned matters. In various embodiments, a burner is utilized to heat the edge director within the glass forming system. This heat can assist in reducing or eliminating the size of the cold region on the edge director, the cold region having a temperature lower than the liquidus temperature for the molten glass. In some embodiments, this heat can help prevent the formation of the cold region during the operation of the glass forming system. If devitrification occurs, the burner can be selectively directed toward the molten glass itself to remove the already developed devitrification. When the burner is directed toward the molten glass, heat from the burner can be directed to a height higher than the target location where the low-temperature region has developed, and the heated molten glass can flow downward into the low-temperature region. Burner technology can provide a cost-effective approach for the localized heating of molten glass. The burner can heat the air upstream of the edge director, and the chimney airflow can cause the heat to rise toward the edge director. By doing so, the edge director can be avoided from being directly exposed to the flame, thereby reducing the possibility of damage to the edge director, while heat can be applied by the burner in a more targeted manner than by a radiant heater so that the heat is used efficiently. The use of burners allows for the creation of cost-effective systems to prevent devitrification growth. Burners can be gas-operated, which can reduce operating costs as gas tends to be much cheaper than electricity. Burners can also be easily introduced and/or adjusted to suit a wide variety of systems. In an exemplary embodiment, a glass forming system for controlling devitrification of glass is provided. The glass forming system comprises a glass forming body, an edge director, and a burner. The edge director is positioned adjacent to the glass forming body and is configured to help control the shape of a glass ribbon formed by the molten glass flowing over the glass forming body by contacting the molten glass. Additionally, the burner is configured to generate a heat-generating flame and is positioned adjacent to the edge director so that heat from the flame increases the temperature of the edge director. In some embodiments, heat from the flame may increase the temperature of the molten glass at one or more locations. In some embodiments, heating at least one of the edge director or the molten glass may reduce the accumulation of devitrified glass adjacent to the edge director. In some embodiments, the burner may be configured to enable a change in at least one of the size of the flame or the direction of the flame. In some embodiments, the glass molded body may include a root, and the burner may be positioned at a height lower than the root and the edge director, and heat from the burner may rise from the burner to heat the edge director. Additionally, in some embodiments, the root may include a linear shape and at least a portion of the burner may extend in a direction parallel to the root. Furthermore, in some embodiments, the root may include a linear shape and at least a portion of the burner may extend in a dir