Characterization of the micro injection-compression molding process for the replication of high aspect ratio micro-structured surfaces

被引:0
作者
Davide Masato
Marco Sorgato
Giovanni Lucchetta
机构
[1] University of Padova,Te.Si. Laboratory
来源
Microsystem Technologies | 2017年 / 23卷
关键词
Injection Molding; High Aspect Ratio; Mold Temperature; Mold Insert; Compression Phase;
D O I
暂无
中图分类号
学科分类号
摘要
The complete and uniform replication of micro-structured functional surfaces is still challenging, even using state-of-the-art micro injection molding technologies, thus hindering the development of new optical and bio-medical applications. Injection-compression molding is a candidate process to overcome the inherent limitations of conventional injection molding by evening the polymer pressure inside the cavity. However, injection-compression molding is characterized by a more complex process control, especially when a rapid heat cycle molding is adopted. In this work, the applicability of variothermal injection-compression molding for the manufacturing of high aspect ratio micro-structured surfaces was experimentally investigated. To achieve the required replication accuracy the study and the optimization of process parameters were carried out, considering the factors that control the compression phase, which pushes the hesitating polymer into micro features. The results show how the optimization of process parameters that are related to the compression phase can be effective to improve and level the replication of high aspect ratio micro features. Moreover, the critical issues arising from the selection of very high mold temperature were investigated, controlling the breakage of the replicated micro features inside the mold.
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页码:3661 / 3670
页数:9
相关论文
共 60 条
[1]  
Becker H(2008)Polymer microfabrication technologies for microfluidic systems Anal Bioanal Chem 390 89-111
[2]  
Gärtner C(2007)Microinjection molding of thermoplastic polymers: a review J Micromechanics Microengineering 17 R96-1690
[3]  
Giboz J(2015)Characterisation of demoulding parameters in micro-injection moulding Microsyst Technol 21 1677-1549
[4]  
Copponnex T(2010)Rapid injection molding of high-aspect-ratio nanostructures Microelectron Eng 87 1546-317
[5]  
Mélé P(2013)Effects of adding injection-compression to rapid heat cycle molding on the structure of a light guide plate J Micromechanics Microengineering 24 015009-1159
[6]  
Griffiths CA(2015)Comparison of injection molding and injection/compression molding for the replication of microstructure Korea-Aust Rheol J 27 309-327
[7]  
Tosello G(2011)Injection molding and injection compression molding of thin-walled light-guided plates with v-grooved microfeatures J Appl Polym Sci 121 1151-2161
[8]  
Dimov SS(2009)Micro-features formation in injection compression molding J Solid Mech Mater Eng 3 320-542
[9]  
Scholz SG(2012)Effects of processing conditions on cavity pressure during injection-compression molding Int J Precis Eng Manuf 13 2155-524
[10]  
Rees A(2012)Influence of rapid mold temperature variation on surface topography replication and appearance of injection-molded parts CIRP Ann-Manuf Technol 61 539-361