This paper reports on design, fabrication, and characterization of a microfilter to be used in biomedical applications. The microfilter, with mesh of 80 μm, is fabricated by micro-injection molding process in polymeric material (polyoxymethylene (POM)) using a steel mold manufactured by micro-electrical discharge machining process. The characteristics of the filter are investigated by numerical simulation in order to define a suitable geometry for micro-injection molding. Then, different process configurations of parameters (melt temperature, injection velocity, mold temperature, holding pressure and time, cooling time, pressure limit) are tested in order to obtain the complete part filling via micro-injection molding process preventing any defects. Finally, the component is dimensionally characterized and the process parameters optimized to obtain the maximum filtration capacity.
Design and Fabrication of a Polymeric Microfilter for Medical Applications
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received July 20, 2015; final manuscript received November 16, 2015; published online December 24, 2015. Assoc. Editor: Gracious Ngaile.
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Surace, R., Bellantone, V., Trotta, G., Basile, V., Modica, F., and Fassi, I. (December 24, 2015). "Design and Fabrication of a Polymeric Microfilter for Medical Applications." ASME. J. Micro Nano-Manuf. March 2016; 4(1): 011006. https://doi.org/10.1115/1.4032035
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