Visualization and simulation of filling process of simultaneous co-injection molding based on level set method
-
Qingsheng Liu
,
Zhijun Liu
Abstract
Co-injection molding (CIM) is an advanced technology which was developed to meet quality requirements and to reduce the material cost. Theoretical investigations concerning it are very limited, especially for simultaneous CIM. The interactions of air, skin and core polymer melt in the process are very complex, which makes it more challenging to simulate free surface flows in the mold. Thus, this article presents a mathematical model for it. The extended Pom-Pom (XPP) model is selected to predict the viscoelastic behavior of polymer melt. The free surface is captured by the level set method. The article vividly shows the simultaneous CIM process by means of a visual numerical simulation technique. Both two-dimensional (2D) and 3D examples are presented to validate the model and illustrate its capabilities. The 3D flow behaviors of simultaneous CIM process are hard to predict numerically. To our knowledge, this is the first attempt at simulating melt flow behaviors in 3D simultaneous CIM based on the XPP constitutive equation and visual technique. The numerical results are in good agreement with the available experiment results, which establish the capability of the multiphase flow model presented in this article to simulate the flow behaviors of polymer melt in simultaneous CIM process.
Acknowledgments
This work was financially supported by the National Basic Research Program of China (973 Program, contract grant number: 2012CB025903) and the Major Research plan of the National Natural Science Foundation of China (Contract number: 91434201), which are gratefully acknowledged.
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Original articles
- Visualization and simulation of filling process of simultaneous co-injection molding based on level set method
- Effect of compatibilizer on the properties of PBS/lignin composites prepared via a vane extruder
- Fabrication and characterization of thermally conductive composites based on poly(butylene terephthalate)/glass fiber-silicon carbide
- Preparation and characterization of poly(MMA-EGDMA-AMPS) microspheres by soap-free emulsion polymerization
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- Investigation of synthesis and processing of cellulose, cellulose acetate and poly(ethylene oxide) nanofibers incorporating anti-cancer/tumor drug cis-diammineplatinum (II) dichloride using electrospinning techniques
- Grafting poly(2-acryloyloxyethyl trimethyl ammonium chloride) branches onto the backbones of corn starch for toughening starch film
- Erosion characteristics of Teflon under different operating conditions
- Development of sustainable resource based poly(urethane-etheramide)/Fe2O3 nanocomposite as anticorrosive coating materials
Articles in the same Issue
- Frontmatter
- Original articles
- Visualization and simulation of filling process of simultaneous co-injection molding based on level set method
- Effect of compatibilizer on the properties of PBS/lignin composites prepared via a vane extruder
- Fabrication and characterization of thermally conductive composites based on poly(butylene terephthalate)/glass fiber-silicon carbide
- Preparation and characterization of poly(MMA-EGDMA-AMPS) microspheres by soap-free emulsion polymerization
- Modification of biaxially oriented polypropylene films using dicyclopentadiene based hydrogenated hydrocarbon resin
- Investigation of synthesis and processing of cellulose, cellulose acetate and poly(ethylene oxide) nanofibers incorporating anti-cancer/tumor drug cis-diammineplatinum (II) dichloride using electrospinning techniques
- Grafting poly(2-acryloyloxyethyl trimethyl ammonium chloride) branches onto the backbones of corn starch for toughening starch film
- Erosion characteristics of Teflon under different operating conditions
- Development of sustainable resource based poly(urethane-etheramide)/Fe2O3 nanocomposite as anticorrosive coating materials
