Micro injection molding is a key technology for mass-production of micro-structured surfaces, such as optical and microfluidic devices. However, the complete replication of high aspect ratio micro features is challenging even using state-of-the-art high-speed injection systems, rapid heat cycle molding and vacuum mold venting. In this work the technological limits of micro-injection molding in replicating high aspect ratio micro-structured surfaces are experimentally investigated, using the molding of a bio-MEMS for erythrocytes depletion as a case study. The obtained results show how these limits are inherently related to an uneven distribution of cavity pressure during mold filling.

Investigating the technological limits of micro-injection molding in replicating high aspect ratio micro-structured surfaces

LUCCHETTA, GIOVANNI;SORGATO, MARCO;CARMIGNATO, SIMONE;SAVIO, ENRICO
2014

Abstract

Micro injection molding is a key technology for mass-production of micro-structured surfaces, such as optical and microfluidic devices. However, the complete replication of high aspect ratio micro features is challenging even using state-of-the-art high-speed injection systems, rapid heat cycle molding and vacuum mold venting. In this work the technological limits of micro-injection molding in replicating high aspect ratio micro-structured surfaces are experimentally investigated, using the molding of a bio-MEMS for erythrocytes depletion as a case study. The obtained results show how these limits are inherently related to an uneven distribution of cavity pressure during mold filling.
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2838456
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