0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Additive manufacturing of photopolymers using the Texas Instruments DLP lightcrafter

[+] Author Affiliations
M. Hatzenbichler, J. Stampfl

Technische Univ. Wien (Austria)

M. Geppert, R. Seemann

FOTEC Forschungs- und Technologietransfer GmbH (Austria)

Proc. SPIE 8618, Emerging Digital Micromirror Device Based Systems and Applications V, 86180A (March 8, 2013); doi:10.1117/12.2001651
Text Size: A A A
From Conference Volume 8618

  • Emerging Digital Micromirror Device Based Systems and Applications V
  • Michael R. Douglass; Patrick I. Oden
  • San Francisco, California, USA | February 02, 2013

abstract

The use of the Texas Instruments DLP® LightCrafterTM as a compact module in lithography-based additive manufacturing technologies (AMT) is discussed in this paper. For this purpose the light engine is placed underneath a transparent vat which is coated with a PTFE-film and filled with photosensitive resin. By loading an appropriate bitmap into the light engine, the resin can be exposed selectively to obtain a photopolymerized layer. To integrate the device into the building process, a configurable I/O trigger is required since the loaded bitmap should be exposed only in a certain period (exposure time). By stacking up the individual layers with a typical layer thickness between 25 and 50μm, a three-dimensional part is built up. The current setup of the used digital LEDs in combination with a customized optical projection system ensures a spatial and temporal homogeneity of the intensity at the build platform, which is significantly better than with traditionally used engines. It could be shown that this system can fabricate threedimensional parts with a resolution < 40μm in x-y plane and 15μm in z-axis. Additionally, mechanical properties (e.g. bending strength) were measured and potential anisotropies, which might be caused by the layered manufacturing process, were assessed. Ceramic-filled polymers were also used and the necessary post-processing steps like the removal of the polymer phase after structuring and the final sintering step to obtain fully dense ceramic parts are discussed. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

M. Hatzenbichler ; M. Geppert ; R. Seemann and J. Stampfl
" Additive manufacturing of photopolymers using the Texas Instruments DLP lightcrafter ", Proc. SPIE 8618, Emerging Digital Micromirror Device Based Systems and Applications V, 86180A (March 8, 2013); doi:10.1117/12.2001651; http://dx.doi.org/10.1117/12.2001651


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


Buy this article ($18 for members, $25 for non-members).
Sign In