Laminate, method for cutting laminate, method for processing laminate, and device and method for cutting brittle plate-like object

Patent metadata

Field	Value
Publication number	US-10279568-B2
Application number	US-201514967851-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	May 13, 2011
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Provided is a laminate (1) obtained by integrally laminating glass sheets (4) on both surfaces of a resin sheet (2). The glass sheets (4) have a thickness of 300 μm or less and end surfaces (4a) of the glass sheets (4) are chamfered.

First claim

The invention claimed is:

1. A processing method for a laminate, the processing method comprising:
a cutting step of cutting the laminate, the laminate comprising a resin sheet and a glass sheet laminated on at least one surface of the resin sheet; and
a finishing step of finishing a cut end surface of the laminate that is formed in the cutting step,
the finishing step comprising:
a first phase of processing a cut end surface of the glass sheet by grinding, and leaving at least a part of a cut end surface of the resin sheet in an unprocessed state; and
a second phase of processing only the cut end surface of the resin sheet that is left in the unprocessed state.

2. The processing method for a laminate according to claim 1 , wherein the grinding in the first phase is executed under a state in which a grinding tool is brought into contact with a surface to be processed at a constant contact force.

3. The processing method for a laminate according to claim 1 , wherein the grinding in the first phase is executed a plurality of times through use of grinding tools having different surface roughnesses of grinding surfaces thereof.

4. The processing method for a laminate according to claim 1 , wherein the second phase comprises processing, by cutting work, only the cut end surface of the resin sheet that is left in the unprocessed state.

5. The processing method for a laminate according to claim 1 , wherein the glass sheet alone has a thickness in a range of 0.01 mm to 0.7 mm.

6. The processing method for a laminate according to claim 1 , wherein a thickness of the glass sheet alone is smaller than a thickness of the resin sheet.

Assignees

• Nippon Electric Glass Co

Inventors

• Miwa Yoshiharu
• Hasegawa Yoshinori
• Noda Takayuki
• Mori Hiroki
• Eta Michiharu

Classifications

• Y10T156/1082

  Partial cutting bonded sandwich [e.g., grooving or incising] · CPC title

• C03B33/04

  Cutting or splitting in curves, especially for making spectacle lenses · CPC title

• Y10T428/24488

  Differential nonuniformity at margin · CPC title

• C03B33/02

  Cutting or splitting sheet glass {or ribbons}; Apparatus or machines therefor (C03B33/09 takes precedence; glass-cutting tools C03B33/10) · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title