Injection Molding: Integration of Theory and Modeling Methods

Rong Zheng, Roger I. Tanner, Xi-Jun Fan

Buku ini diterbitkan oleh Springer-Verlag Berlin Heidelberg tahun 2011. Cakupan  201 halaman.

Daftar isi:

1. Introduction, 1

• Injection Molding, 1
• Classification of Polymers, 4
• Rheological Characterization of Polymer Fluids, 5
• Development of Numerical Simulations for Injection Molding, 9

2. Fundamentals of Rheology, 11

• Introduction to Basic Concepts, 11
• Constitutive Equations, 17
• Time–Temperature Superposition, 28
•  2.4 The Pressure–Volume–Temperature (PVT) Relation, 32
• Lubrication Approximation, 33

3. Mold Filling and Post Filling, 35

• Hele-Shaw Equation, 35
• Frozen Layer, 41
• Mold Deformation, 42
• Wall Slip, 44

4. Crystallization, 47

• Introduction, 47
• Crystallization Kinetics, 48
• Effect of Crystallization on Physical Properties,56
• Influence of Colorants, 60
• Molecular Dynamics Simulation, 63

5. Flow-Induced  Alignment in Short-Fiber  Reinforced Polymers, 65

• Concentration Regimes of Fiber Suspensions, 65
• Evolution Equations, 66
• Closure Approximations, 70
• Interaction Coefficient, 74
• Modifications to Folgar–Tucker Model, 75
• Rheological Equations for Fiber Suspensions, 77
• Tucker’s Flow Classification for Fiber Suspension in Thin Cavities, 79
• Fiber Migration in Inhomogeneous Flow Fields, 80
• Brownian Dynamics Simulation, 81
• Non-Newtonian Matrix Suspensions, 83

6. Shrinkage and Warpage, 87

• Introduction, 87
• Mechanical and Thermal Properties of Short-Fiber Composites, 89
• Thermally and Pressure-Induced Stresses, 95
• Displacement Calculation, 101
• Empirical Approach, 102
• Corner Deformation, 103

7. Mold Cooling, 105

• Mold Cooling System, 105
• Transient Heat Transfer in Mold, 105
• Cycle-Average Simplification, 108

8. Computational Techniques, 111

• Introduction, 111
• Flow Analyses, 112
• Structural Analysis for Shrinkage and Warpage Prediction, 134
• Boundary Element Method for Mold Cooling Analysis, 138
• Overall Conclusion, 147

Appendix A, 149

Appendix B, 153

Appendix C, 159

References, 163

Author Index, 179

Subject Index, 185

 

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