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Patent Searching and Data


Title:
OPTICAL SHEET MOLDING DEVICE AND OPTICAL SHEET MOLDING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/002597
Kind Code:
A1
Abstract:
Provided is an optical sheet molding technology by means of which a thin sheet having a preset shape contour can be extruded with high accuracy. This optical sheet molding device has an extrusion unit, a molding roll unit, and a thick part molding mechanism. The extrusion unit has an ejection slit 18 through which a sheet-shaped molten resin can be ejected. The ejection slit is provided with a standard gap part 29 and an enlarged gap part 30. The standard gap part is configured to have a gap of a fixed size in a direction crossing the extrusion direction. The enlarged gap part is configured to have a larger gap than the standard gap part, in a position corresponding to a thick part. The molding roll unit conveys the ejected molten resin in the extrusion direction while causing the same to solidify. The thick part molding mechanism successively molds one or more thick parts, made thicker than other parts in the extrusion direction, in the sheet-shaped molten resin.

Inventors:
MIZUNUMA, Koji (2068-3 Ooka, Numazu-sh, Shizuoka 10, 〒4108510, JP)
UNO, Yuusuke (2068-3 Ooka, Numazu-sh, Shizuoka 10, 〒4108510, JP)
TANADA, Masahiro (2068-3 Ooka, Numazu-sh, Shizuoka 10, 〒4108510, JP)
Application Number:
JP2016/067565
Publication Date:
January 05, 2017
Filing Date:
June 13, 2016
Export Citation:
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Assignee:
TOSHIBA KIKAI KABUSHIKI KAISHA (2-2 Uchisaiwaicho 2-chome, Chiyoda-ku Tokyo, 03, 〒1008503, JP)
International Classes:
B29C47/14; B29C47/88; B29C59/04; G02B5/02
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (SUZUYE & SUZUYE BLDG, 1-12-9 Toranomon, Minato-k, Tokyo 01, 〒1050001, JP)
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