Apparatus for manufacturing vacuum glass

Patent metadata

Field	Value
Publication number	US-11920404-B2
Application number	US-201916982819-A
Country	US
Kind code	B2
Filing date	Jan 31, 2019
Priority date	Mar 26, 2018
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

An apparatus for manufacturing vacuum insulation glass is provided. The apparatus for manufacturing the vacuum insulation glass includes a cap frit disposed on an exhaust hole, and an exhaust finishing frit provided on a bottom surface of the cap frit and including a frit formed of a glass material. The exhaust finishing frit is dispensed, in the paste form, to the cap frit such that the exhaust finishing frit is easily aligned with the cap frit.

First claim

What is claimed is:

1. An apparatus for manufacturing vacuum insulation glass, the apparatus comprising:
an exhaust head disposed at a side of a glass assembly having an exhaust hole;
an exhaust pump fluidly connected to the exhaust head to exhaust an internal gas of the glass assembly to form a vacuum;
a cap frit disposed on the exhaust hole of the glass assembly;
an exhaust finishing frit provided at a bottom surface of the cap frit and including a frit formed of a glass material, the exhaust finishing frit including an exhaust passage through which the internal gas of the glass assembly is exhausted; and
a support plate provided under the exhaust head to press against the cap frit, the support plate being provided at a top of the cap frit,
wherein the support plate has a circular plate shape and includes a plate through part to communicate with the exhaust passage of the exhaust finishing frit, the plate through part being formed at a center of the circular plate shape and aligned in a center of the cap frit.

2. The apparatus of claim 1 , wherein the exhaust finishing frit includes a first frit having a first open loop shape defined by a first cutoff part and a second frit having a second open loop shape defined by a second cutoff part, the first cutoff part and the second cutoff part defining the exhaust passage, and
wherein the second frit surrounds the first frit such that the first frit is provided inside the second frit.

3. The apparatus of claim 2 , wherein each of the first frit and the second frit includes a round shape or a bent shape.

4. The apparatus of claim 2 , wherein the exhaust passage includes:
a first passage defined by the first cutoff part; and
a second passage defined by the second cutoff part, the second passage forming a downstream flow path of the first passage.

5. The apparatus of claim 2 , wherein a distance from a center of the cap frit to the first cutoff part is shorter than a distance from the center of the cap frit to the second cutoff part.

6. The apparatus of claim 2 , wherein the first cutoff part and the second cutoff part are positioned at opposed sides with respect to the center of the cap frit such that the internal gas passing through the first cutoff part flows through the second cutoff part.

7. The apparatus of claim 2 , wherein each of the first and second frits includes a cylindrical shape,
wherein the first and second cutoff parts are formed in at least a portion of the cylindrical shape.

8. The apparatus of claim 1 , wherein the exhaust finishing frit includes a paste-type enamel composition, and
the exhaust finishing frit is dispensed in a predetermined shape at the cap frit.

9. The apparatus of claim 8 , wherein the exhaust finishing frit including the paste-type enamel composition is formed by mixing glass powder including the enamel composition, a solvent, and a binder.

10. The apparatus of claim 8 , wherein the enamel composition includes P 2 O 5 , SiO 2 , Al 2 O 3 , ZrO 2 , and R 2 O,
wherein R includes Li, Na, and K.

11. The apparatus of claim 10 , wherein the enamel composition includes at least one of B 2 O 3 , ZnO, V 2 O 5 , and SnO.

12. The apparatus of claim 11 , wherein a weight % of components constituting the enamel composition includes:

component
weight %

P 2 O 5
24.8 to 34.3

SiO 2
10.8 to 22.2

Al 2 O 3
10.2 to 28.4

ZrO 2
5.0 to 17.9

Na 2 O
9.0 to 20.8

K 2 O
5.0 to 15.2

Li 2 O
0.4 to 5.3

B 2 O 3
1.0 to 10.0

ZnO
0.3 to 10.0

V 2 O 5
0.9 to 10.0

SnO
0.5 to 5.0

13. The apparatus of claim 1 , wherein a melting point of the cap frit is higher than a melting point of the exhaust finishing frit.

14. The apparatus of claim 1 , further comprising:
a heating device disposed above the support plate to heat the cap frit and the exhaust finishing frit,
wherein the heating device heats the cap frit and the exhaust finishing frit through the support plate.

15. The apparatus of claim 14 , wherein the heating device heats the cap frit and the exhaust finishing frit at a first temperature when an exhaust process is performed in which the internal gas of the glass assembly is exhausted by driving the exhaust pump, and
the heating device heats the cap frit and the exhaust finishing frit at a second temperature higher than the first temperature when a finish process is performed in which the exhaust finishing frit is melted to seal the exhaust hole.

16. The apparatus of claim 1 , wherein the exhaust finishing frit extends in a spiral shape toward an outer circumferential surface of the cap frit from a center of the cap frit and includes a first portion to be round and a second portion to be round and being an adjacent portion of the first portion, and
wherein a space between the first portion and the second portion defines the exhaust passage such that the exhaust passage has a spiral shape.

Assignees

• Lg Electronics Inc

Inventors

• Kim Sora
• Kim Soyoon
• Kim Yunsung
• Yang Eunsoo

Classifications

• E06B3/6775 Primary

  Evacuating or filling the gap during assembly · CPC title

• C03C8/02

  Frit compositions, i.e. in a powdered or comminuted form · CPC title

• C03C8/20

  containing titanium compounds; containing zirconium compounds · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C8/08 Primary

  containing phosphorus · CPC title