Title:
光学シート成形装置、光学シート成形方法
Document Type and Number:
Japanese Patent JP6917680
Kind Code:
B2
Abstract:
An optical sheet forming technique includes an extrusion unit having a discharge slit, a forming roll unit having rolls rotatable about rotation axes, a thick portion forming groove provided in the forming roll unit, and a position adjustment mechanism which adjusts a position of a discharge slit with respect to the thick portion forming groove. In a discharged molten resin, a neck-in portion caused by a neck-in phenomenon is continuously formed in an extrusion direction. The neck-in portion is positioned to be opposed to the thick portion forming groove by the position adjustment mechanism.
More Like This:
Inventors:
Takuji Mizunuma
Yukawa Daichi
Yuta Yamamuro
Yukawa Daichi
Yuta Yamamuro
Application Number:
JP2016089540A
Publication Date:
August 11, 2021
Filing Date:
April 27, 2016
Export Citation:
Assignee:
Shibaura Machinery Co., Ltd.
International Classes:
B29C48/92; B29C48/08; B29C48/12; B29C48/305; B29C48/31; B29C48/88; B29C48/885
Domestic Patent References:
| JP2010234739A | ||||
| JP1034748A | ||||
| JP2015101001A | ||||
| JP201069781A | ||||
| JP2014162186A |
Foreign References:
| CN10414249A |
Attorney, Agent or Firm:
Suzue International Patent Office