A three-dimensional thermal model for viscoelastic polymer melt packing process in injection molding

Zhuang, Xin; Ouyang, Jie; Li, Yanggui; Jiang, Chuntao; Wang, Lihua

doi:10.1016/j.applthermaleng.2017.09.124

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…In this study, some studies [3,[27][28][29][30][31][32][33] are considered as a reference for solving of mathematical equations. For the finite volumes method, the balance equations such as the continuity, momentum, energy and Bird-Carreau viscosity model are solved numerically in the ANSYS Fluent R14 software, as given the following:…”

Section: Resultsmentioning

confidence: 99%

“…They showed that simulation was found to correctly describe trends such as; an increase in the pressure required to fill moulds as temperature decrease. Zhuang et al [30] developed a 3D thermal model to simulate viscoelastic polymer melt packing process in injection moulding. They showed that with an increase in melt temperature, the precise values of the first normal stress difference increased slightly, while the density decreased by stages.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Nozzle Section in Plastic Injection Moulding Process

Gürel

Ipek

Başoğul

et al. 2019

Hittite J. Sci. Eng.

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P lastics was discovered at the end of the 19th century and developed further, especially after the Second World War. They were begun to be used in the industry and in our daily life with its thousands of varieties [1-3]. For plastic part manufacturing determined according to the physical and chemical characteristics of plastic, various manufacturing techniques have been developed (injection, extrusion, blowing, etc.). Almost 33% of plastic parts are manufactured by using injection moulding technique [4,5]. It is widely used in mechanical construction, automotive components, aerospace and aeronautical industries, and household products. Many studies have been made on manufacturing with injection moulding technique that has an extensive manufacturing capacity [6-9]. This technique enables a low cost and efficiency, fast production cadence, and high dimensional accuracy of complex plastic parts. The quality, geometrical structure, dimension tolerance, surface quality and factors affecting strength of the parts manufactured with the Article History:

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Nozzle Section in Plastic Injection Moulding Process

Gürel

Ipek

Başoğul

et al. 2019

Hittite J. Sci. Eng.

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“…The Pom‐Pom model and Rolie‐Poly model are suitable for characterizing the rheological behaviors of branched and linear polymer melts. More and more simulation results of the filling process of injection molding based on viscoelastic constitutive equations have been reported in the last decade 13–20 …”

Section: Introductionmentioning

confidence: 99%

Macroscopic and mesoscopic simulation of polystyrene melt in the filling process of injection molding

Liu

Jiang

2023

J of Applied Polymer Sci

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In this article, a fluid flow and heat transfer model which consist of the mass, momentum, and energy conservation equations together with the level set equation and Rolie‐Poly constitution equation is proposed and applied to simulate the rheological behaviors of viscoelastic polystyrene melt in the filling process of injection molding. The macroscopic velocity, pressure, temperature, stress, and mesoscopic molecular conformation of polystyrene melt are shown and analyzed detailedly during the mold filling process. The single‐mode Rolie‐Poly model is employed to describe the stress–strain relationship of polystyrene melt, and the level set method is used to capture the evolution of melt front interface. The governing equations for polymer melt are discretized by the finite volume method on collocated mesh, and solved by the SIMPLE algorithm. Numerical simulations have been implemented based on rectangular cavities with different gate locations, and rectangular and circular inserts. Numerical results indicate that the gate locations, gate numbers, insert size and shape are major factors that affect the rheological behaviors of polystyrene melt in the filling stage of injection molding, and polymer chains experienced higher shear and extension effects in the regions near to mold walls and obstacle. In addition, the length and position of weld lines are discussed in the current study.

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“…Viscoelastic fluids are present in several industrial processes involving paints, melts, plastics, food, adhesives, or 3D printing of polymeric materials, among others [2,3,4,5,6,7,8,9]. Due to the broad spectrum of applications, the study of this type of materials is carried out from different disciplines, ranging from chemistry to mathematics.…”

Section: Introductionmentioning

confidence: 99%

Stabilised Variational Multi-scale Finite Element Formulations for Viscoelastic Fluids

Castillo

Moreno

Baiges

et al. 2021

Arch Computat Methods Eng

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The objective of this article is to summarise the work that we have been doing as a group in the context of stabilised finite element formulations for viscoelastic fluid flows. Viscoelastic fluids are complex non-Newtonian fluids, characterised by having an irreducible constitutive equation that needs to be solved coupled with the momentum and continuity equations. The finite element approximation of this kind of fluids presents several numerical difficulties. It inherits obviously the problems associated with the approximation of the incompressible Navier-Stokes equations. But, on top of that, now the constitutive equation is highly non-linear, with an advective term that may lead to both global and local oscillations in the numerical approximation. Moreover, even in the case of smooth solutions, it is necessary to meet some additional compatibility conditions between the velocity and the stress interpolation in order to ensure control over velocity gradients. The stabilised methods detailed in this work allow one to use equal order or even arbitrary interpolation for the problem unknowns (σ-u-p) (elastic deviatoric stress-velocity-pressure) and to stabilise dominant convective terms, and all of them can be framed in the context of Variational Multi-scale Methods (VMS). Some additional numerical ingredients that are introduced in this article are the treatment of the non-linearities associated with the problem and the possibility to introduce a discontinuity-capturing technique to prevent local oscillations. Concerning the constitutive equation, both the standard as the logarithmic conformation

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A three-dimensional thermal model for viscoelastic polymer melt packing process in injection molding

Cited by 7 publications

References 38 publications

Optimization of Nozzle Section in Plastic Injection Moulding Process

Optimization of Nozzle Section in Plastic Injection Moulding Process

Macroscopic and mesoscopic simulation of polystyrene melt in the filling process of injection molding

Stabilised Variational Multi-scale Finite Element Formulations for Viscoelastic Fluids

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