Design,manufacture and geometric verification of rapid prototyped microfluidic encapsulations by computed tomography |
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Authors: | Jorge Santolaria Rosa Monge Ángel Tobajas Roberto Jimenez Mirko A Cabrera Luis J Fernandez |
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Affiliation: | 1. Department of Design and Manufacturing Engineering, Universidad de Zaragoza, María de Luna, 3, 50018 Zaragoza, Spain;2. Group of Structural Mechanics and Materials Modelling (GEMM), Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza, Mariano Esquillor s/n, 50018 Zaragoza, Spain;3. Centro Universitario de la Defensa, A.G.M. Ctra. Huesca s/n, 50090 Zaragoza, Spain |
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Abstract: | This paper presents the dimensional verification of encapsulations used to package microfluidic devices manufactured using a 3D printer of photopolymerisable resin. This characterisation has been performed by computed tomography (CT) by comparing newly manufactured encapsulations and samples that have been subjected to test conditions. Thus, it has been possible to draw conclusions both on the deviations of the nominal geometry of the encapsulations and on how this might affect their performance. This paper presents a scheme of dimensional verification from the point clouds obtained by CT. Finally, a combined threshold and scale factor correction technique of the tomography images is shown. This method is based on the simultaneous measurement of objective and master parts with known geometry. The results reveal the improvements achievable in the accuracy, given a particular machine configuration. The conclusions facilitate the improvement of the geometric design of these devices regarding their behaviour under test conditions. |
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Keywords: | Computed tomography Rapid prototyping Microfluidic encapsulations Measurement Threshold Scale factor |
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