Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding

Pham Son Minh; Tran Minh The Uyen

doi:doi:10.11648/j.ijmea.20140205.11

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Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding

Pham Son Minh, Tran Minh The Uyen

Published in International Journal of Mechanical Engineering and Applications (Volume 2, Issue 5)

Received: 1 October 2014 Accepted: 16 October 2014 Published: 30 October 2014

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Abstract

In thin-wall injection molding, due to the very fast polymer melt heat transfer to the mold wall, the freeze layer appears quickly during the filling stage. In this study, high-speed injection molding (up to 1400 mm/s injection speed) was studied. A mold of spiral shape, 0.4 mm thick, is used to verify the ability of melt filling under different injection speeds. Simulation by Moldflow software was also performed for verification. The result shows that when injection speeds vary for 100 mm/s, 500 mm/s, 1000 mm/s, and 1400 mm/s, the flow length to thickness ratio was increased with the value of 335, 467.5, 605, and 640, respectively. The simulation results also show that the heat transfer coefficient between hot melt and mold wall has a strong influence on the flow length, especially with the high-speed injection molding. In general, slower injection speed requires a higher heat transfer coefficient, whereas higher injection speed require only a lower heat transfer coefficient.

Published in	International Journal of Mechanical Engineering and Applications (Volume 2, Issue 5)
DOI	10.11648/j.ijmea.20140205.11
Page(s)	58-63
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

High-Speed Injection Molding, Flow Length to Thickness Ratio, Heat Transfer Coefficient

References

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[2]	F. Yu, H. Deng, Q. Zhang, K. Wang, C. L. Zhang, F. Chen, Q. Fu, “Anisotropic multilayer conductive networks in carbon nanotubes filled polyethylene / polypropylene blends obtained through high speed thin wall injection molding”, Polym., vol. 54, pp. 6425–6436, November 2013.
[3]	M. Sortino, G. Totis, E. Kuljanic, “Comparison of injection molding technologies for the production of micro-optical devices”, Procedia Eng., vol. 69, pp. 1296–1305, 2014.
[4]	C. C. Tsai, S. M. Hsieh, H. E. Kao, “Mechatronic design and injection speed control of an ultra-high-speed plastic injection molding machine”, Mech., vol. 19, pp. 147–155, March 2009.
[5]	H. Bormuth, “High-speed injection moulding with Polypropylene”, Mater. Design, vol. 5, pp. 137–138, June–July 1984.
[6]	D. Drummer, K. Vetter, “Expansion–injection–molding (EIM) by cavity near melt compression – About the process characteristic”, CIRP J. Manuf. Sci. Technol., vol. 4, pp. 376–381, 2011.
[7]	B. Sha, S. Dimov, C. Griffiths, M.S. Packianather, “Micro-injection moulding: factors affecting the replication quality of micro features”, 4M 2006 - Second International Conference on Multi-Material Micro Manufacture, pp. 269–272, 2006.
[8]	C.A. Griffiths, S.S. Dimov, D.T. Pham, “Micro injection moulding: the effects of tool surface finish on melt flow behavior”, 4M 2006 - Second International Conference on Multi-Material Micro Manufacture, pp. 373–376, 2006.
[9]	D. Annicchiarico, U. M. Attia, J. R. Alcock, “A methodology for shrinkage measurement in micro-injection moulding”, Polym. Test., vol. 32, pp. 769–777, June 2013.
[10]	W. M. Yang, H. Yokoi, “Visual analysis of the flow behavior of core material in a fork portion of plastic sandwich injection molding”, Polym. Test., vol 22, pp. 37–43, February 2003.
[11]	H. Yokoi, , N. Masuda, H. Mitsuhata, “Visualization analysis of flow front behavior during filling process of injection mold cavity by two-axis tracking system”, J. Mater. Process. Technol., vol 130–131, pp. 328–333, December 2002.
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APA Style

Pham Son Minh, Tran Minh The Uyen. (2014). Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. International Journal of Mechanical Engineering and Applications, 2(5), 58-63. https://doi.org/10.11648/j.ijmea.20140205.11

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ACS Style

Pham Son Minh; Tran Minh The Uyen. Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. Int. J. Mech. Eng. Appl. 2014, 2(5), 58-63. doi: 10.11648/j.ijmea.20140205.11

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AMA Style

Pham Son Minh, Tran Minh The Uyen. Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. Int J Mech Eng Appl. 2014;2(5):58-63. doi: 10.11648/j.ijmea.20140205.11

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@article{10.11648/j.ijmea.20140205.11,
  author = {Pham Son Minh and Tran Minh The Uyen},
  title = {Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {2},
  number = {5},
  pages = {58-63},
  doi = {10.11648/j.ijmea.20140205.11},
  url = {https://doi.org/10.11648/j.ijmea.20140205.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140205.11},
  abstract = {In thin-wall injection molding, due to the very fast polymer melt heat transfer to the mold wall, the freeze layer appears quickly during the filling stage. In this study, high-speed injection molding (up to 1400 mm/s injection speed) was studied. A mold of spiral shape, 0.4 mm thick, is used to verify the ability of melt filling under different injection speeds. Simulation by Moldflow software was also performed for verification. The result shows that when injection speeds vary for 100 mm/s, 500 mm/s, 1000 mm/s, and 1400 mm/s, the flow length to thickness ratio was increased with the value of 335, 467.5, 605, and 640, respectively. The simulation results also show that the heat transfer coefficient between hot melt and mold wall has a strong influence on the flow length, especially with the high-speed injection molding. In general, slower injection speed requires a higher heat transfer coefficient, whereas higher injection speed require only a lower heat transfer coefficient.},
 year = {2014}
}

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TY  - JOUR
T1  - Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding
AU  - Pham Son Minh
AU  - Tran Minh The Uyen
Y1  - 2014/10/30
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmea.20140205.11
DO  - 10.11648/j.ijmea.20140205.11
T2  - International Journal of Mechanical Engineering and Applications
JF  - International Journal of Mechanical Engineering and Applications
JO  - International Journal of Mechanical Engineering and Applications
SP  - 58
EP  - 63
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20140205.11
AB  - In thin-wall injection molding, due to the very fast polymer melt heat transfer to the mold wall, the freeze layer appears quickly during the filling stage. In this study, high-speed injection molding (up to 1400 mm/s injection speed) was studied. A mold of spiral shape, 0.4 mm thick, is used to verify the ability of melt filling under different injection speeds. Simulation by Moldflow software was also performed for verification. The result shows that when injection speeds vary for 100 mm/s, 500 mm/s, 1000 mm/s, and 1400 mm/s, the flow length to thickness ratio was increased with the value of 335, 467.5, 605, and 640, respectively. The simulation results also show that the heat transfer coefficient between hot melt and mold wall has a strong influence on the flow length, especially with the high-speed injection molding. In general, slower injection speed requires a higher heat transfer coefficient, whereas higher injection speed require only a lower heat transfer coefficient.
VL  - 2
IS  - 5
ER  -

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Author Information

Pham Son Minh

Department of Mechanical Engineering, HCMC University of Technology and Education, Ho Chi Minh City, Vietnam
Tran Minh The Uyen

Department of Mechanical Engineering, HCMC University of Technology and Education, Ho Chi Minh City, Vietnam

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Plain Text BibTeX RIS

APA Style

Pham Son Minh, Tran Minh The Uyen. (2014). Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. International Journal of Mechanical Engineering and Applications, 2(5), 58-63. https://doi.org/10.11648/j.ijmea.20140205.11

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ACS Style

Pham Son Minh; Tran Minh The Uyen. Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. Int. J. Mech. Eng. Appl. 2014, 2(5), 58-63. doi: 10.11648/j.ijmea.20140205.11

Copy | Download

AMA Style

Pham Son Minh, Tran Minh The Uyen. Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding. Int J Mech Eng Appl. 2014;2(5):58-63. doi: 10.11648/j.ijmea.20140205.11

Copy | Download

@article{10.11648/j.ijmea.20140205.11,
  author = {Pham Son Minh and Tran Minh The Uyen},
  title = {Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {2},
  number = {5},
  pages = {58-63},
  doi = {10.11648/j.ijmea.20140205.11},
  url = {https://doi.org/10.11648/j.ijmea.20140205.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140205.11},
  abstract = {In thin-wall injection molding, due to the very fast polymer melt heat transfer to the mold wall, the freeze layer appears quickly during the filling stage. In this study, high-speed injection molding (up to 1400 mm/s injection speed) was studied. A mold of spiral shape, 0.4 mm thick, is used to verify the ability of melt filling under different injection speeds. Simulation by Moldflow software was also performed for verification. The result shows that when injection speeds vary for 100 mm/s, 500 mm/s, 1000 mm/s, and 1400 mm/s, the flow length to thickness ratio was increased with the value of 335, 467.5, 605, and 640, respectively. The simulation results also show that the heat transfer coefficient between hot melt and mold wall has a strong influence on the flow length, especially with the high-speed injection molding. In general, slower injection speed requires a higher heat transfer coefficient, whereas higher injection speed require only a lower heat transfer coefficient.},
 year = {2014}
}

Copy | Download

TY  - JOUR
T1  - Numerical Study on Flow Length in Injection Molding Process with High-Speed Injection Molding
AU  - Pham Son Minh
AU  - Tran Minh The Uyen
Y1  - 2014/10/30
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmea.20140205.11
DO  - 10.11648/j.ijmea.20140205.11
T2  - International Journal of Mechanical Engineering and Applications
JF  - International Journal of Mechanical Engineering and Applications
JO  - International Journal of Mechanical Engineering and Applications
SP  - 58
EP  - 63
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20140205.11
AB  - In thin-wall injection molding, due to the very fast polymer melt heat transfer to the mold wall, the freeze layer appears quickly during the filling stage. In this study, high-speed injection molding (up to 1400 mm/s injection speed) was studied. A mold of spiral shape, 0.4 mm thick, is used to verify the ability of melt filling under different injection speeds. Simulation by Moldflow software was also performed for verification. The result shows that when injection speeds vary for 100 mm/s, 500 mm/s, 1000 mm/s, and 1400 mm/s, the flow length to thickness ratio was increased with the value of 335, 467.5, 605, and 640, respectively. The simulation results also show that the heat transfer coefficient between hot melt and mold wall has a strong influence on the flow length, especially with the high-speed injection molding. In general, slower injection speed requires a higher heat transfer coefficient, whereas higher injection speed require only a lower heat transfer coefficient.
VL  - 2
IS  - 5
ER  -

Copy | Download