Title:
3D PRINTER
Document Type and Number:
WIPO Patent Application WO/2021/162365
Kind Code:
A3
Abstract:
A 3D printer according to one embodiment of the present invention comprises: a resin tank for accommodating a resin material; a molding plate which is capable of ascending/descending in the resin tank and supports a molded article molded by sequentially stacking a plurality of unit molding layers; an ascending/descending driving unit for driving the ascending/descending of at least one of the resin tank or the molding plate; an exposure unit for emitting light toward the molding plate; and a lens sheet including a first material layer having a high refractive index and a second material layer having a low reflective index, wherein the first material layer is disposed between the molding plate and the exposure unit and has a molding surface facing the molding plate and a light receiving surface facing the exposure unit, and has, on one surface, a plurality of fine lens portions for converging and diffusing the light coming from the exposure unit, and the second material layer has an interlocking concavo-convex portion that has a shape fitting the fine lens portions of the first material layer.
Inventors:
SONG SUNG-EUN (KR)
CHO HYEON-SOO (KR)
LEE KWANG-MIN (KR)
CHO HYEON-SOO (KR)
LEE KWANG-MIN (KR)
Application Number:
PCT/KR2021/001585
Publication Date:
October 07, 2021
Filing Date:
February 05, 2021
Export Citation:
Assignee:
CARIMA CO LTD (KR)
International Classes:
B29C64/264; B29C64/227; B29C64/245; B33Y30/00; G02B3/00
Domestic Patent References:
| WO2006074812A2 | 2006-07-20 |
Foreign References:
| JP2015171820A | 2015-10-01 | |||
| KR100841438B1 | 2008-06-26 | |||
| KR20160113062A | 2016-09-28 | |||
| KR20110053010A | 2011-05-19 |
Attorney, Agent or Firm:
HUH, Sung-won et al. (KR)
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