Artigo Acesso aberto Revisado por pares

Anisotropy of Photopolymer Parts Made by Digital Light Processing

2017; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 1 Linguagem: Inglês

10.3390/ma10010064

ISSN

1996-1944

Autores

Mario Monzón, Zaida Ortega, A. Falcón Hernández, Rubén Paz, Zaida Ortega,

Tópico(s)

Manufacturing Process and Optimization

Resumo

Digital light processing (DLP) is an accurate additive manufacturing (AM) technology suitable for producing micro-parts by photopolymerization. As most AM technologies, anisotropy of parts made by DLP is a key issue to deal with, taking into account that several operational factors modify this characteristic. Design for this technology and photopolymers becomes a challenge because the manufacturing process and post-processing strongly influence the mechanical properties of the part. This paper shows experimental work to demonstrate the particular behavior of parts made using DLP. Being different to any other AM technology, rules for design need to be adapted. Influence of build direction and post-curing process on final mechanical properties and anisotropy are reported and justified based on experimental data and theoretical simulation of bi-material parts formed by fully-cured resin and partially-cured resin. Three photopolymers were tested under different working conditions, concluding that post-curing can, in some cases, correct the anisotropy, mainly depending on the nature of photopolymer.

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