# US 2021/0276911 A1 · Bend-forming device for glass plate

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- Number: US 2021/0276911 A1
- Document ID: US20210276911A1
- Status: Published application
- Kind: A1
- Application number: 17/321,055
- Filed: 2021-05-14
- Published: 2021-09-09
- Earliest claimed: 2018-11-19
- Assignees: AGC Inc.
- Applicants: Agc Inc.
- Inventors: Shinya OTA; Ryota MATSUMOTO
- Web page: https://patentgrep.com/patent/US20210276911A1

## CPC

- C03B 23/03: by press-bending between shaping moulds
- C03B 23/0307: {Press-bending involving applying local or additional heating, cooling or insulating means}
- C03B 2215/50: Structural details of the press-mould assembly
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES

## Abstract

An apparatus for bending a glass plate includes a lower ring mold to be disposed under a glass plate and configured to support an edge portion of the glass plate; a plurality of supporting members configured to support the lower ring mold; an upper mold to be disposed above the glass plate and having a downwardly convex forming surface configured to be pressed against the glass plate supported by the lower ring mold; a lower heater configured to heat the lower ring mold; and a spacer attached to the lower ring mold, the spacer configured to control a gap between the upper mold and the lower ring mold.

## Claims

### Claim 1

An apparatus for bending a glass plate, comprising:
a lower ring mold to be disposed under a glass plate and configured to support an edge portion of the glass plate;
a plurality of supporting members configured to support the lower ring mold;
an upper mold to be disposed above the glass plate and having a downwardly convex forming surface configured to be pressed against the glass plate supported by the lower ring mold;
a lower heater configured to heat the lower ring mold; and
a spacer attached to the lower ring mold, the spacer configured to control a gap between the upper mold and the lower ring mold.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein the lower ring mold is formed in a polygonal shape having at least three corner portions as viewed in plan view, and the plurality of supporting members are disposed at the corner portions of the lower ring mold, and
wherein each of the plurality of supporting members disposed at the corner portions has a first end connected to the lower ring mold and a second end connected to a base configured to support the plurality of supporting members, and each of the plurality of supporting members has a fixed height from the base to the lower ring mold.

### Claim 3 (depends on 2)

The apparatus according to claim 2, wherein sliders are disposed at respective positions where the plurality of supporting members are connected to the base, the sliders allowing the plurality of supporting members to move in an in-plane direction as viewed in plan view.

### Claim 4 (depends on 2)

The apparatus according to claim 2, further comprising a press machine disposed under the base, wherein an elastic member is disposed between the base and the press machine to urge the lower ring mold toward upward.

### Claim 5 (depends on 1)

The apparatus according to claim 1, wherein the glass plate has a thickness of at least 70% and at most 130% of a thickness of the spacer.

### Claim 6 (depends on 1)

The apparatus according to claim 1, wherein the edge portion of the glass plate is spaced from the spacer by a distance of at least 3 mm and at most 30 mm.

### Claim 7 (depends on 1)

The apparatus according to claim 1, wherein the lower ring mold comprises a guide disposed between plurality of supporting members, the guide regulating a deformation direction of the lower ring mold.

### Claim 8 (depends on 1)

The apparatus according to claim 1, wherein the upper mold comprises an upper heater, the upper heater heating the upper mold.