Visualization of Flow Behaviour in Micro-Cavities during Micro Injection Moulding
Polymeric micro-cantilevers (Cs) are rapidly
becoming popular for MEMS applications such as chemo- and biosensing
as well as purely electromechanical applications such as
microrelays. Polymer materials present suitable physical and
chemical properties combined with low-cost mass production. Hence,
micro-cantilevers made of polymers indicate much more
biocompatibility and adaptability of rapid prototyping along with
mechanical properties. This research studies the effects of three
process and one size factors on the filling behaviour in micro cavity,
and the role of each in the replication of micro parts using different
polymer materials i.e. polypropylene (PP) SABIC 56M10 and
acrylonitrile butadiene styrene (ABS) Magnum 8434 . In particular,
the following factors are considered: barrel temperature, mould
temperature, injection speed and the thickness of micro features. The
study revealed that the barrel temperature and the injection speed are
the key factors affecting the flow length of micro features replicated
in PP and ABS. For both materials, an increase of feature sizes
improves the melt flow. However, the melt fill of micro features does
not increase linearly with the increase of their thickness.
[1] C. A. Griffiths et al., The finite element analysis of melt flow behavior in
micro-injection moulding Process, J. Eng. Manuf. 2008, pp. 1107-1118.
[2] F. H. C. Heussler et. al., Three-dimensional Navier–Stokes simulations
of buoyant, vertical miscible Hele-Shaw displacements, J. Fluid Mech.
2014, pp. 157–183.
[3] C. A. Griffiths et. al., The effects of tool surface quality in microinjection
moulding J. Mater. Proc. Technol. 2007, pp. 418–427.
[4] M. S. Kim and S. M. Kim, Filling Behavior of Polymer Melt in Micro
Injection Molding for V-Grooves Pattern, J. Korean Soc. Manuf. Tech.
Eng. 2014, pp. 291-298.
[5] U. R. O. Theilade, Surface micro topography replication in injection
moulding, PhD Thesis, Technical University of Denmark, 2005.
[1] C. A. Griffiths et al., The finite element analysis of melt flow behavior in
micro-injection moulding Process, J. Eng. Manuf. 2008, pp. 1107-1118.
[2] F. H. C. Heussler et. al., Three-dimensional Navier–Stokes simulations
of buoyant, vertical miscible Hele-Shaw displacements, J. Fluid Mech.
2014, pp. 157–183.
[3] C. A. Griffiths et. al., The effects of tool surface quality in microinjection
moulding J. Mater. Proc. Technol. 2007, pp. 418–427.
[4] M. S. Kim and S. M. Kim, Filling Behavior of Polymer Melt in Micro
Injection Molding for V-Grooves Pattern, J. Korean Soc. Manuf. Tech.
Eng. 2014, pp. 291-298.
[5] U. R. O. Theilade, Surface micro topography replication in injection
moulding, PhD Thesis, Technical University of Denmark, 2005.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:70919", author = "Reza Gheisari and Paulo J. Bartolo and Nicholas Goddard", title = "Visualization of Flow Behaviour in Micro-Cavities during Micro Injection Moulding", abstract = "Polymeric micro-cantilevers (Cs) are rapidly
becoming popular for MEMS applications such as chemo- and biosensing
as well as purely electromechanical applications such as
microrelays. Polymer materials present suitable physical and
chemical properties combined with low-cost mass production. Hence,
micro-cantilevers made of polymers indicate much more
biocompatibility and adaptability of rapid prototyping along with
mechanical properties. This research studies the effects of three
process and one size factors on the filling behaviour in micro cavity,
and the role of each in the replication of micro parts using different
polymer materials i.e. polypropylene (PP) SABIC 56M10 and
acrylonitrile butadiene styrene (ABS) Magnum 8434 . In particular,
the following factors are considered: barrel temperature, mould
temperature, injection speed and the thickness of micro features. The
study revealed that the barrel temperature and the injection speed are
the key factors affecting the flow length of micro features replicated
in PP and ABS. For both materials, an increase of feature sizes
improves the melt flow. However, the melt fill of micro features does
not increase linearly with the increase of their thickness.", keywords = "Flow length, micro-cantilevers, micro injection
moulding, microfabrication.", volume = "9", number = "10", pages = "1188-8", }