Title:
METHOD FOR MANUFACTURING OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2020/195269
Kind Code:
A1
Abstract:
Provided is a method for manufacturing an optical film, which includes drilling using an end mill, prevents quality deterioration of an inner circumferential surface of a hole, and is capable of drilling with high dimensional accuracy. This method for manufacturing a drilled optical film includes forming a workpiece by laminating a plurality of optical films, and a drilling step of drilling the workpiece using an end mill. The drilling step includes drilling a pilot hole in the workpiece with the end mill in a one-end supported state in which one axial end of the end mill is supported, followed by cutting an inner circumferential surface of the pilot hole with the end mill in a both-end supported state in which one and the other axial ends of the end mill are supported.
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Inventors:
NAKAICHI MAKOTO (JP)
NAKAI KOTA (JP)
NAKAMURA NORIHIRO (JP)
IKEUCHI TAKAMITSU (JP)
IGURA JUNICHI (JP)
YAMAMOTO YUKI (JP)
NAKAI KOTA (JP)
NAKAMURA NORIHIRO (JP)
IKEUCHI TAKAMITSU (JP)
IGURA JUNICHI (JP)
YAMAMOTO YUKI (JP)
Application Number:
PCT/JP2020/005344
Publication Date:
October 01, 2020
Filing Date:
February 12, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B23B51/08; B23B41/00; B23C3/12; B23C5/10; B23C9/00; B29D7/01; G02B5/30
Foreign References:
| JP2018022140A | 2018-02-08 | |||
| JPS591512U | 1984-01-07 | |||
| JPS62174818U | 1987-11-06 | |||
| JP2010017812A | 2010-01-28 | |||
| US5560408A | 1996-10-01 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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