Method and device for manufacturing glass article

Patent metadata

Field	Value
Publication number	US-11370684-B2
Application number	US-201816768961-A
Country	US
Kind code	B2
Filing date	Nov 29, 2018
Priority date	Dec 20, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

Provided is a manufacturing method for a glass article, including: a pre-heating step (S1) of heating a transfer pipe (7); and a transfer step (S4) of allowing a molten glass to flow inside the transfer pipe (7) after the pre-heating step (S1). The transfer pipe (7) includes: a main body portion (8) having a tubular shape; and a flange portion (9a, 9b) formed at an end portion of the main body portion (8). The main body portion (8) is retained by a refractory (10). The pre-heating step (S1) includes an external force application step of applying an external force (F) to the transfer pipe (7) to extend the transfer pipe (7).

First claim

The invention claimed is:

1. A manufacturing method for a glass article, comprising:
a pre-heating step of heating a transfer pipe; and
a transfer step of allowing a molten glass to flow inside the transfer pipe after the pre-heating step,
wherein the transfer pipe comprises:
a main body portion having a tubular shape; and
a flange portion formed at an end portion of the main body portion,

wherein the main body portion is retained by a refractory, and
wherein the pre-heating step comprises an external force application step of applying an external force to the transfer pipe to extend the transfer pipe.

2. The manufacturing method for a glass article according to claim 1 , wherein, in the external force application step, the external force is applied to the transfer pipe so that a measured expansion length of the transfer pipe approaches a theoretical expansion length.

3. The manufacturing method for a glass article according to claim 2 , wherein the external force application step is performed when a difference between the theoretical expansion length and the measured expansion length is larger than a predetermined threshold value.

4. The manufacturing method for a glass article according to claim 3 ,
wherein the refractory is fixed to a casing, and
wherein, in the external force application step, the external force is applied to the transfer pipe by bringing a pressing member of the casing into contact with the flange portion.

5. The manufacturing method for a glass article according to claim 4 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

6. The manufacturing method for a glass article according to claim 4 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

7. The manufacturing method for a glass article according to claim 3 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

8. The manufacturing method for a glass article according to claim 3 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

9. The manufacturing method for a glass article according to claim 2 ,
wherein the refractory is fixed to a casing, and
wherein, in the external force application step, the external force is applied to the transfer pipe by bringing a pressing member of the casing into contact with the flange portion.

10. The manufacturing method for a glass article according to claim 9 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

11. The manufacturing method for a glass article according to claim 9 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

12. The manufacturing method for a glass article according to claim 2 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

13. The manufacturing method for a glass article according to claim 2 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

14. The manufacturing method for a glass article according to claim 1 ,
wherein the refractory is fixed to a casing, and
wherein, in the external force application step, the external force is applied to the transfer pipe by bringing a pressing member of the casing into contact with the flange portion.

15. The manufacturing method for a glass article according to claim 14 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

16. The manufacturing method for a glass article according to claim 14 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

17. The manufacturing method for a glass article according to claim 1 , wherein, in the external force application step, the external force is applied to the flange portion at a plurality of positions in a circumferential direction of the flange portion.

18. The manufacturing method for a glass article according to claim 17 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

19. The manufacturing method for a glass article according to claim 1 ,
wherein the main body portion of the transfer pipe is arranged in an inclined posture, and
wherein, in the external force application step, the external force is applied along an inclination direction of the main body portion.

20. A manufacturing apparatus for a glass article, comprising:
a transfer pipe configured to allow a molten glass to flow inside thereof; and
a refractory configured to retain the transfer pipe,
wherein the transfer pipe comprises:
a main body portion having a tubular shape; and
a flange portion formed at an end portion of the main body portion,

wherein the main body portion is retained by the refractory, and
wherein the manufacturing apparatus further comprises an external force applying unit configured to apply an external force to the transfer pipe to extend the transfer pipe.

Assignees

• Nippon Electric Glass Co

Inventors

• Tamamura Shusaku
• Okamoto Shusuke
• TENYAMA Kazuyuki

Classifications

• F24D3/14

  incorporated in a ceiling, wall or floor · CPC title

• C03B5/42

  Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls · CPC title

• C03B5/235 Primary

  Heating the glass (C03B5/02, C03B5/18, C03B5/225 take precedence) · CPC title

• C03B5/26 Primary

  Outlets {, e.g. drains, siphons}; Overflows {, e.g. for supplying the float tank, tweels} · CPC title

• F27D3/14

  Charging or discharging liquid or molten material · CPC title