Heat chamfering apparatus and method

Patent metadata

Field	Value
Publication number	US-12434992-B2
Application number	US-202218285279-A
Country	US
Kind code	B2
Filing date	Mar 31, 2022
Priority date	Apr 1, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A heat chamfering apparatus includes a heated body configured to peel an edge of a glass panel by applying thermal shock to the glass panel while being in contact with the edge of the glass panel and a heater heating the heated body. The heated body includes a heated region and a contact region in a longitudinal direction thereof, the heated region being heated by the heater, and the contact region being configured to be in contact with the glass panel. The cross-sectional area of the contact region is smaller than the cross-sectional area of the contact region. A heat chamfering method includes peeling an edge of a glass panel by applying thermal shock to the edge of the glass panel by moving a heated body heated by a heater relatively with respect to the glass panel along and in contact with the edge of the glass panel.

First claim

What is claimed is:

1. A heat chamfering apparatus comprising:
a heated body configured to peel an edge of a glass panel by applying thermal shock to the glass panel while being in contact with the edge of the glass panel; and
a heater heating the heated body,
wherein the heated body comprises a heated region and a contact region in a longitudinal direction thereof, the heated region being heated by the heater, and the contact region being configured to be in contact with the glass panel,
the cross-sectional area of the contact region is smaller than the cross-sectional area of the heated region,
the contact region has a closest point located most adjacently to the glass panel and a farthest point located farthest from the glass panel, and
the contact region comprises a first cross-section portion to which the closest point belongs and a second cross-section portion to which the farthest point belongs, divided by a perpendicular bisector of a line segment connecting the closest point and the farthest point, a cross-sectional area of the first cross-section portion being smaller than a cross-sectional area of the second cross-section portion.

2. The heat chamfering apparatus of claim 1 , wherein the contact region is located on a distal end of the heated body.

3. The heat chamfering apparatus of claim 2 , wherein the heated body is a heated rod.

4. The heat chamfering apparatus of claim 2 , wherein the heater heats the heated body by induction heating.

5. The heat chamfering apparatus of claim 1 , wherein the heated body is a heated rod.

6. The heat chamfering apparatus of claim 1 , wherein the heater heats the heated body by induction heating.

7. The heat chamfering apparatus of claim 1 , wherein the heater is an induction coil heating the heated body by induction heating, and
the heated body extends through a center of the induction coil.

8. The heat chamfering apparatus of claim 1 , wherein the contact region has a cross-section with a diameter ranging from 3 mm to 8 mm, and the heated region has a cross-section with a diameter ranging from 6 mm to 15 mm.

9. The heat chamfering apparatus of claim 1 , wherein the contact region comprises a contact zone including the closest point and a conduction boosting zone including the farthest point,
the contact zone having a first arc as an outline, and the conduction boosting zone having a second arc as an outline, and
the first arc having a smaller radius than the second arc.

10. The heat chamfering apparatus of claim 9 , wherein the first arc and the second arc are concentric.

11. The heat chamfering apparatus of claim 9 , wherein the first arc has a greater central angle than the second arc.

12. A heat chamfering apparatus comprising:
a heated body configured to peel an edge of a glass panel by applying thermal shock to the glass panel while being in contact with the edge of the glass panel; and
a heater heating the heated body,
wherein the heated body comprises a heated region and a contact region in a longitudinal direction thereof, the heated region being heated by the heater, and the contact region being configured to be in contact with the glass panel,
the cross-sectional area of the contact region is smaller than the cross-sectional area of the heated region,
the contact region comprises a contact zone including a closest point located most adjacently to the glass panel and a farthest point located farthest from the glass panel, and
the contact zone has a first length measured in a first direction from the closest point to the farthest point and a second length measured in a second direction perpendicular to the first direction, the first length being greater than the second length.

13. The heat chamfering apparatus of claim 12 , wherein the contact zone has an elliptical arc as an outline,
the first direction being a major axis direction of the elliptical arc, and the second direction being a minor axis direction of the elliptical arc.

14. The heat chamfering apparatus of claim 12 , wherein the contact region is located on a distal end of the heated body.

15. The heat chamfering apparatus of claim 14 , wherein the heated body is a heated rod.

16. The heat chamfering apparatus of claim 14 , wherein the heater heats the heated body by induction heating.

17. The heat chamfering apparatus of claim 12 , wherein the heated body is a heated rod.

18. The heat chamfering apparatus of claim 12 , wherein the heater heats the heated body by induction heating.

19. The heat chamfering apparatus of claim 12 , wherein the heater is an induction coil heating the heated body by induction heating, and the heated body extends through a center of the induction coil.

20. The heat chamfering apparatus of claim 12 , wherein the contact region has a cross-section with a diameter ranging from 3 mm to 8 mm, and the heated region has a cross-section with a diameter ranging from 6 mm to 15 mm.

Assignees

• Corning Inc

Inventors

• Kim Euisoo
• Kong Bokyung
• Lee Jooyoung
• Woo Kwangje

Classifications

• B28D1/221

  by thermic methods · CPC title

• C03B33/09 Primary

  by thermal shock · CPC title

• B26D2001/0053

  having a special cutting edge section or blade section · CPC title

• B26D1/0006

  Cutting members therefor · CPC title

• B26D1/45

  having a cutting member the movement of which is not covered by any preceding group · CPC title