Research on refrigerative stereo-lithography
Author(s): Murakami, Tamotsu; Kamimura, Akiya; Kazama, Atsushi; Nakajima,
Naomasa
Source: Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan
Society of Mechanical Engineers, Part C v 63 n 606 Feb 1997 JSME Tokyo
Japan p 605-612 ISSN: 0387-5024 CODEN: NKCHDB
Publication Year: 1997
Abstract: Since in current stereo-lithography an object is fabricated in
liquid resin, use of a 'support' shape other than an
objective shape is required so that isolated portions of the objective
shape do not float away and overhang portions do not curve in the liquid
resin. The necessity of designing supports before and removing them after
fabrication restricts the range of fabricatable shapes as well as requires
time and effort. To solve these problems, we propose use of refrigerative
stereo-lithography. In its process, liquid resin supplied as a layer is
cooled and solidified. Then a laser beam is used for selective
photopolymerization of the resin layer. After iteration of this process for
all layers, the fabricated object can be obtained by heating the entire
solidified resin block to melt and remove only nonphotopolymerized
portions. Since the object is fabricated in already solidified resin, there
is no need for supports. We also describe the refrigerative
stereo-lithography machine developed and a fabricated example. In Japanese
(Author abstract) 8 Refs. EI Order
Number: 97063692176
Subjects: Lithography; Polymers; Fabrication; Laser beams; Polymerization;
Photochemical reactions; Heating; Computer aided manufacturing; Computer
aided design; Rapid prototyping; Optical engineering
Identifiers: Photo forming; Stereo lithography
Classification Codes: 714.2
Document Type: JA
Treatment: AX
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