aim4np Automated In-line Metrology for Nanoscale Production: plastic injection simulations for nanosurface.

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Presentation: Back to INDEX


aim4np is supported as FP7 project

SUMMARY:

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.

Publications: Back to INDEX



• J. Pina-Estany, A.A. Garcia-Granada
"Molecular Dynamics simulation Method Applied to Nanocavities Replication Via Injection Moulding"
International Communications in Heat and Mass Transfer
Volume 87, October 2017, Pages 1–5, Available online 12 July 2017 (DOI information: 10.1016/j.icheatmasstransfer.2017.06.018)

• J. Pina-Estany; A.A. García-Granada;
"3D simulation of nanostructures replication via injection moulding"
International Polymer Processing
Vol. 32, August 2017, No. 4, pp. 483-488 (DOI information: 10.3139/217.3383)

• 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;
"Submodelling simulation of plastic injection for nano roughness replication"
Industrial Technologies 2016
Poster Vol. --- N.--- Pag: --- Year: 22-24 June 2016 Place of publication: Amsterdam, NL

• 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.Pina-Estany; J.Fraxedas; F.Perez-Murano; C.Colominas; J.M.Puigoriol-Forcada; A.A.Garcia-Granada;
"Simulation of plastic injection for nano roughness replication"
ICME 2016
Poster Vol. --- N.--- Pag: --- Year: 12-15 April 2016 Place of publication: Barcelona, ES

• J.Pina-Estany; J.Fraxedas; F.Perez-Murano; C.Colominas; J.M.Puigoriol-Forcada; A.A.Garcia-Granada;
"Simulation of plastic injection for nanostructure pattern replication"
MNC 2015
Poster Vol. --- N.--- Pag: --- Year: 8-9 December 2015 Place of publication: Amsterdam, NL

• Jordi Fraxedas; Daniel Ruso; Francesc Perez-Murano; Carles Colominas; Andrés García-Granada;
"Nanostructured pattern replication on transparent polycarbonate by plastic injection"
EuroNanoForum 2015
Poster Vol. --- N.--- Pag: --- Year: 10-12 June 2015 Place of publication: Riga, Latvia

• J.Pina-Estany; J.Fraxedas; F.Perez-Murano; C.Colominas; J.M.Puigoriol-Forcada; A.A.Garcia-Granada;
"Simulation of plastic injection for nanostructure pattern replication"
PRN 2015
Poster Vol. --- N.--- Pag: --- Year: 18-19 May 2015 Place of publication: DTU Copenhagen, DK

• 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

Contact: Back to INDEX


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
  
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