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Numerical Study of Geometric Parameters Effect on Rapid Heat Cycle Molding Process

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Design and Modeling of Mechanical Systems—III (CMSM 2017)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

A 3D numerical study of thermal regulation system of Rapid Heat Cycle Molding (RHCM) process producing smartphone cover has been undertaken. In order to succeed an RHCM operation, so as to improve the part quality and the process productivity, heating/cooling channels design is of great importance. For this purpose, we propose in this study the optimization of geometric parameters of heating/cooling channels. The concerned geometric parameters are heating/cooling channel diameter, distance between two successive channel and distance channel–cavity surface. The thermal behaviors in mold and polymer domains are predicted by the commercial Finite Volume Analysis software Fluent 6.3.26 in cyclic transient regime. It was shown that a regular state is reached rapidly, since the second molding cycle. Thermal responses have shown that increasing heating/cooling channels diameter promotes the RHCM process productivity, but, at the same time, generates an uneven temperature distribution and consumes a significant energy. With regards to heating/cooling channels spacing, it has been demonstrated the advantage of increasing the distance between two consecutive channels. However, increasing the distance channel–cavity surface contributes to balance the temperature distribution at the cavity surface, but it affects the RHCM process productivity by increasing the molding cycle time.

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Abbreviations

Cp:

(heat capacity) (J kg−1 °C−1)

D:

(channel diameter) (m)

g:

(gravity acceleration) (m s−2)

hh, hc :

(heat transfer coefficient) (W m−2 °C−1)

Hliq :

(liquefaction latent heat of water) (J kg−1)

L:

(length of vertical channel) (m)

n:

(normal direction)

T:

(temperature) (°C)

λ:

(thermal conductivity) (W m−1 °C−1)

µ:

(dynamic viscosity) (kg m−1s−1)

ρ:

(density) (kg m−3)

Re:

(Reynolds number)

Pr:

(Prandtal number)

m:

(mold)

p:

(polymer)

s:

(steam)

w:

(water)

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Author information

Authors and Affiliations

  1. Computational Fluid Dynamic and Transfer Phenomena, Mechanical Engineering Department, National Engineering School of Sfax, Sfax, Tunisia

    Fatma Kria, Moez Hammami & Mounir Baccar

Authors
  1. Fatma Kria
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  2. Moez Hammami
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  3. Mounir Baccar
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Corresponding author

Correspondence to Fatma Kria .

Editor information

Editors and Affiliations

  1. National School of Engineers of Sfax, Sfax, Tunisia

    Mohamed Haddar

  2. National School of Engineers of Sfax, Sfax, Tunisia

    Fakher Chaari

  3. National School of Engineers of Monastir, Monastir, Tunisia

    Abdelmajid Benamara

  4. National School of Engineers of Monastir, Monastir, Tunisia

    Mnaouar Chouchane

  5. Sfax Preparatory Engineering Institute, Sfax, Tunisia

    Chafik Karra

  6. National School of Engineers of Monastir, Monastir, Tunisia

    Nizar Aifaoui

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Kria, F., Hammami, M., Baccar, M. (2018). Numerical Study of Geometric Parameters Effect on Rapid Heat Cycle Molding Process. In: Haddar, M., Chaari, F., Benamara, A., Chouchane, M., Karra, C., Aifaoui, N. (eds) Design and Modeling of Mechanical Systems—III. CMSM 2017. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-66697-6_112

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  • DOI: https://doi.org/10.1007/978-3-319-66697-6_112

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-66696-9

  • Online ISBN: 978-3-319-66697-6

  • eBook Packages: EngineeringEngineering (R0)

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