An analytical model for scanning-projection based stereolithography

Emami, Mohammad Mahdi; Barazandeh, Farshad; Yaghmaie, Farrokh

doi:10.1016/j.jmatprotec.2014.12.001

Cited by 39 publications

(19 citation statements)

References 10 publications

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“…However, it still requires further improvements to overcome its present limitations and to become attractive enough to be considered for commercial applications. In order to enhance the overall performance of the PµSL and increase its applications, many studies have focused on optical and hardware configuration 20,30–34 , resin formulation 35–39 , process planning optimization 40–43 , solidification modeling 37,44–46 , and multi-material printing 47–49 . In the mentioned studies, they used multi-purpose commercial optical components, and meanwhile, there were no reports on customizing optical components and reducing the device dimensions.…”

Section: Introductionmentioning

confidence: 99%

A compact LED-based projection microstereolithography for producing 3D microstructures

Behroodi

Latifi

Najafi

2019

Sci Rep

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Projection microstereolithography (PµSL) is a promising additive manufacturing technique due to its low cost, accuracy, speed, and also the diversity of the materials that it can use. Recently it has shown great potentials in various applications such as microfluidics, tissue engineering, micro-optics, biomedical microdevices, and so on. However, studies on PµSL are still ongoing in terms of the quality and accuracy of the construction process, which particularly affect the fabrication of complex 3D microstructures and make it attractive enough to be considered for commercial applications. In this paper, a compact LED-based PµSL 3D printer for the fabrication of 3D microstructures was developed, and the effective parameters that influence the quality of construction were thoroughly investigated and optimized. Accordingly, a customized optical system, including illumination optics and projection optics, was designed using optical engineering principles. This custom 3D printer was proposed for the PµSL process, which besides improving the quality of construction, led to the reduction of the size of the device, its cost-effectiveness, and the repeatability of its performance. To demonstrate the performance of the fabricated device, a variety of complex 3D microstructures such as porous, hollow, helical, and self-support microstructures were constructed. In addition, the repeatability of the device was assessed by fabricating microstructure arrays. The device performance showed that the lateral accuracy of printing was better than 5 μm, and the smallest thickness of the printed layer was 1 μm. Moreover, the maximum printable size of the device was 6.4 mm × 4 mm × 40 mm.

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Section: Introductionmentioning

confidence: 99%

A compact LED-based projection microstereolithography for producing 3D microstructures

Behroodi

Latifi

Najafi

2019

Sci Rep

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“…More specifically, the modelling works of VP focus on the topology and dimensional accuracy ( [12][13][14] numerical) and mainly on the mechanical properties ( [16] analyticalempirical, [17][18][19][20][21] numerical and [21][22][23][24] empirical) and finally in [25] an analytical-empirical approach models heat transfer related issues.…”

Section: Vat Photopolymerization Processesmentioning

confidence: 99%

“…Layer thickness, orientation, hatch spacing [25] Energy distribution of a single pixel Different types of stereolithography process of infiltrants, which greatly improve the material properties. Another strategy is the use of a poly-methyl methacrylate powder and a liquid binder that causes a curing reaction, at room temperature.…”

Section: Kpimentioning

confidence: 99%

Modelling of additive manufacturing processes: a review and classification

Stavropoulos

Foteinopoulos

2018

Manufacturing Rev.

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Abstract. Additive manufacturing (AM) is a very promising technology; however, there are a number of open issues related to the different AM processes. The literature on modelling the existing AM processes is reviewed and classified. A categorization of the different AM processes in process groups, according to the process mechanism, has been conducted and the most important issues are stated. Suggestions are made as to which approach is more appropriate according to the key performance indicator desired to be modelled and a discussion is included as to the way that future modelling work can better contribute to improving today's AM process understanding.

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“…The scanning laser is used to cure photosensitive resin in a vat line by line and achieves high dimensional accuracy of part (Hull, 1986). Instead of using laser, mask projection stereolithography (MPSL) uses a pattern generator such as digital mirror device (DMD) to dynamically generate mask to cure a whole layer once (Choi et al, 2009) or generate masks to cure a layer in a scanning manner (Emami et al, 2015).…”

Section: Introductionmentioning

confidence: 99%