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  5. Vacuum venting enhances the replication of nano/micro-features in microinjection molding process
 
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Vacuum venting enhances the replication of nano/micro-features in microinjection molding process

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Author(s)
Choi, Seong Ying 
Zhang, Nan 
Toner, J. P. 
Gilchrist, M. D. 
Uri
http://hdl.handle.net/10197/7992
Date Issued
24 March 2016
Date Available
24T02:00:13Z March 2017
Abstract
Vacuum venting is a method proposed to improve feature replication in microparts that are fabricated using micro injection molding (MIM). A qualitative and quantitative study has been carried out to investigate the effect of vacuum venting on nano/micro feature replication in MIM. Anodized aluminium oxide containing nanofeatures and a bulk metallic glass tool mold containing micro features were used as mold inserts. The effect of vacuum pressure at constant vacuum time, and of vacuum time at constant vacuum pressure on the replication of these features is investigated. It is found that vacuum venting qualitatively enhances the nano-scale feature definition as well as increases the area of feature replication. In the quantitative study, higher aspect ratio features can be replicated more effectively using vacuum venting. Increasing both vacuum pressure and vacuum time are found to improve the depth of replication, with the vacuum pressure having more influence. Feature orientation and final sample shape could affect the absolute depth of replication of a particular feature within the sample.
Sponsorship
Enterprise Ireland
European Commission - European Regional Development Fund
Type of Material
Journal Article
Publisher
American Society of Mechanical Engineers (ASME)
Journal
Journal of Micro and Nano-Manufacturing.
Volume
4
Issue
2
Copyright (Published Version)
2016 ASME
Keywords
  • Micro injection moldi...

  • Vacuum venting

  • Anodized aluminium ox...

  • Cyclic olefin copol (...

  • Poly(methyl methacryl...

  • Anodized aluminium ox...

DOI
10.1115/1.4032891
Language
English
Status of Item
Not peer reviewed
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Owning collection
Mechanical & Materials Engineering Research Collection
Scopus© citations
2
Acquisition Date
Feb 4, 2023
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