Official website for the project http://www.aim4np.eu.
Previous works on Mold4ProdE and currently on
plast4future Injection moulding production technology for multi-functional nano-structured
plastic components enabled by Nano Imprint Lithography
IQS work for aim4np:
Work at IQS focuses on plastic injection of moulds with several nansurface qualities to relate with final part appearance:
• Simulations focus on plastic injection and surface quality.
Animated gif of plastic injection on a aim4np logo.
Animated gif of simplified robot movement to measure.
SUMMARY TABLE OF SOFTWARE AND QUESTIONS TO BE ANSWERED:
Software
Friction
Small mesh
FIB mark increase velocity
FIB mark increase depth
FIB mark increase width in tangential direction
FIB mark increase length in radial direction
FIB mark increase length in tangential direction
FIB mark next to each other in tangential direction
FIB mark next to each other in radial direction
Silicon pattern
Solidworks
(1)
(2)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
ClicktoCast
(1)
(4)
(4)
(4)
(4)
(4)
(3)
(4)
(3)
(3)
Vulcan
(1)
(2)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
Vulcan user script
(5)
(2)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
Moldex3D
(5)
(2)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
(3)
MoldFlow
(1)
(4)
(4)
(4)
(4)
(4)
(4)
(4)
(4)
(3)
Autodesk CFD
(7)
(6)
(8)
(9)
(10)
(11)
(14)
(15)
(16)
(17)
Kratos
(5)
(6)
(13)
(13)
(13)
(13)
(12)
(13)
(12)
(17)
(1) Not possible
(2) Wrong path
(3) Wrong due to small mesh
(4) Not possible to refine at nanolevel
(5) Small differences in pressure
(6) Yes. Use submodelling
(7) Yes. Small influence in pressure.
Real roughness modeled with CATIA V5 in 2D. Higher roughness helps filling the mark.
The arrival of the polymer at the control point seems to be affected randomly since no tendence is obtained.
(8) Yes. At higher velocities, the control point is easier filled. At higher velocities, there is a peak of VOF and
the control volume is emptied. Higher velocities generate more pressure in the control point. At higher velocities
a negative value is obtained, probably due to the displacement of the aire previous to the arrival of the polymer.
(9) Yes. Lower profundities fill better.
Profundity effects the time of the fluid arriving at the bottom of the mark.
(10) The higher the width, the lower the resulting pressure is at stationary state. Transient states are similar whatsoever the width. The
higher the width, the fewer the pressure in stationary state. In fact, this result could have been deduced from the pressure comparison.
Bernoulli equation states that the lower the pressure, the higher the velocity, and the other way round. A peak in the velocities is
generated before the stationary state is obtained.
(11) Yes. Shorter marks fill faster than longer marks. Shorter marks are filled more homogeniously
than longer markr. It means, in a flow that remembers the hesitation event. Longer marks are filled with a particular pattern.
Before filling all the cavity the fluid “jumps”, touches the bottom wall and then fills the rest of the mark. Regardless of the
mark shape, at stationary state the velocity of the polymer is zero in the wall inside the mark because of the no-slip condition.
The long mark shows a certain velocity in stationary state.
(12) Yes. Pina request 22.01.2015
(13) Yes. Pina request 30.11.2014
(14) Yes. Shorter marks generate a higher velocity in the point touching the wall. Shorter marks receive the fluid before.
(15) Yes. 3D simulation needed, under study. At the moment it is concluded that the distance doesn't effect the stationary flow, the effect
on the transient flow is currently being studied. The marks’ regions are the last one to be filled. This is because it’s a zone with a complex geometry that offers higher resistance to the flow.
The polymer fills all the marks starting by the outer parts.
When the marks are close (0.001 and 0.005 mm), an area without fluid in the region between the marks is generated (see second 34).
The distance between marks effects the flow and therefore the way the marks are filled.
The marks have no influence in the steady state flow since they are inside the zero velocity zone.
(16) The distance of the left mark effects the velocity profile in the point inside the right mark. That’s concluded of the observation that
the red series are different in each plot. When the marks are separated, the velocity profiles are independant one from the other.
Left mark receives the fluid slower, due to the higher distance of the inlet. The left mark produces an earlier arrival of the fluid
in the right mark. In short: when under a certain value, each mark effects the flow in the other mark.
(17) Yes. Pina request 25.02.2015
(18)
Animated gif of initial submodelling simulation of FIB marks using velocities from VULCAN in
a fine mesh with KRATOS.
Check the filling time and flow path.
Check the problem of small mesh size.
Check wrong results with mesh transitions.
Check the problem of distance between FIB marks monitoring VOF using Autodesk CFD submodelling.
• Design of molds with demoulding angle.
Animated gif of mobile part with mould design based on sketch tracing techniques.
Animated gif simple mould design with soluble core to demould.
Animated gif of complete mould design to study robot accesibility for measurements.
• Simulations of vibrations of measuring table.
Simulations are carried out to avoid vibration movements of measuring table where the robot is to be placed to measure nano-surface roughness.
Animated gif of vibrations of measurement table.
Initial simulations showed that with a more detailed model resonance is predicted. When the mass of mould and robot is to be placed on top of this measuring
table resonance frequencies decrease and therefore the risk of producing noise for roughness measurements increses.
Animated gif of vibrations of reinforced measurement table.
A possible solution is to reinforce measuring table to minimiose risk of vibrations.
• E. Dimla, J. Rull-Trinidad, A.-A. Garcia-Granada, G. Reyes
Thermal Comparison of Conventional and Conformal Cooling Channel Designs for a Non-Constant Thickness Screw Cap
Journal of Korean Society Precision Engineering Volume 35, n.1, January 2018, Pages ?, (No JCR but Scopus)
• A.A.Garcia-Granada;
"Superficies funcionales para plásticos inyectados. Nanopatterns"
EUROSURFAS 2017 Poster Vol. --- N.--- Pag: --- Year: 3 October 2017 Place of publication: Barcelona, SP
• J. Pina-Estany, C. Colominas, J. Fraxedas, J. Llobet, F. Perez-Murano, J.M. Puigoriol-Forcada, D. Ruso, A.A. Garcia-Granada
"A statistical analysis of nanocavities replication applied to injection moulding" International Communications in Heat and Mass Transfer Volume 81, February 2017, Pages 131–140 (DOI information: 10.1016/j.icheatmasstransfer.2016.11.003)
• O.Muntada-Lopez; J.Pina-Estany; J.Fraxedas; F.Perez-Murano; C.Colominas; A.A.Garcia-Granada;
"Simulations and testing of polymer replication on nanoscale"
PRN 2017 Poster Vol. --- N.--- Pag: --- Year: 8-9 May 2017 Place of publication: Fraunhofer IPT / WZL Aachen, DE
• J.Pina-Estany; J.Fraxedas; F.Perez-Murano; C.Colominas; J.M.Puigoriol-Forcada; A.A.Garcia-Granada;
"Fluent solver expanded to the nano-world" PRN 2016 Poster Vol. --- N.--- Pag: --- Year: 19-20 May 2016 Place of publication: FHNW University of Applied Sciences and Arts Northwestern Switzerland, Widisch , CH
• J. Fraxedas, U. Staufer, R. Munnig Schmidt, J. Spronck, E. Rull Trinidad, R. Deng, G. Schitter, M. Thier, S. Messineo, Singho Ito, R. Hainisch, R. Saathof, F. Perez-Murano, A. Verdaguer, A. Blümel, E. J. W. List-Kratochvil, R. Koops, M. van Veghel, R. Sum, A. Lieb, W. Schott, D. Dontsov, T. Sulzbach, W. Engl, C. Penzkofer, C. Colominas, K. Fluch, A. García-Granada, J. M. Puigoriol-Forcada
"Automated in-line Metrology for Nanoscale Production – aim4np."
European Conference on Surface Science 2014 Poster Vol. --- N.--- Pag: --- Year: 31 August-5 September 2014 Place of publication: Antalaya, Turkey
• R. Koops, U.Staufer, R. Munnig Schmidt, J. Spronck, E. Rull Trinidad, R. Deng, G. Schitter, M. Thier, S. Messineo, J. Fraxedas, F. Perez-Murano, A. Verdaguer, A. Blümel, E.J.W. List, M. van Veghel, R. Sum, A. Lieb, W. Schott, D. Dontsov, T. Sulzbach, W. Engl, C. Penzkofer, C. Colominas, K. Fluch, A. Garcia-Granda
"Automated in-line Metrology for Nanoscale Production – aim4np."
Industrial Technologies 2014 Poster Vol. --- N.--- Pag: --- Year: 9-11 April 2014 Place of publication: Athens International Conference Centre Megaron
For any queries do not hesitate to contact:
Andres-Amador Garcia-Granada:
Via Augusta 390, 08017 Barcelona, Spain
Tel.: +34 932 672 083 / Tel.Cen.: +34 932 672 000 -ext.283
Fax: +34 932 056 266
andres.garcia@iqs.edu
www.iqs.edu
Click here for a complete list of Andres-Amador Garcia-Granada Publications.
Animated gif of plastic injection on a aim4np logo.
Animated gif of simplified robot movement to measure.
Animated gif of initial submodelling simulation of FIB marks using velocities from VULCAN in
a fine mesh with KRATOS.
Animated gif of mobile part with mould design based on sketch tracing techniques.
Animated gif simple mould design with soluble core to demould.
Animated gif of complete mould design to study robot accesibility for measurements.
Animated gif of vibrations of measurement table.
Animated gif of vibrations of reinforced measurement table.
