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Indexed by:期刊论文

Date of Publication:2009-09-21

Journal:Materials Science Forum

Included Journals:EI、CPCI-S、Scopus

Volume:628 629

Page Number:417-422

ISSN No.:0878493123

Key Words:Microfluidic chip; injection molding; defect; molding quality

Abstract:Compared with hot embossing, microfluidic chips injection molding is higher efficiency process and more suitable for mass production, but the quality control for injection molding is much more complex. Experiments indicate that the incomplete replication of the micro-channel and the sink mark for microfluidic chips are the chief defects to the molding. Simulation and theoretical analysis show that the stagnant flow of the melt in micro-channel and the shrinkage difference of the chips in different directions are the main reasons for molding defect. A set of new methods that how to control process parameter, design mold, and select polymer material is proposed to reduce or avoid the defects. © (2009) Trans Tech Publications, Switzerland.