3D Numerical Simulation Research on the Effect of Gate Location on Fiber Orientation and Injection-Molded Parts Deformation

Abstract:

Based on generalized non-Newtonian fluid with seven parameters Cross-WLF viscosity model and modified 2-domain Tait model, the injection process of short glass fiber-reinforced polypropylene is simulated with a true 3D model. The effects of gate location on clamp force, fiber orientation and parts deformation are investigated. The results show that: (1) Clamp force of the 3^rd scheme that gate location is set on the center of long-side is the largest and that of the 1^st scheme that gate location is set on the center of top is the smallest. (2)Because of shear stress, in the direction of thickness, the distributions of fiber orientation are layered orderly, namely, the degree of fiber orientation in core layer is the lowest, but that in subsurface layer is the highest. While perpendicular to the shear flow, the layering distribution isn’t obvious. (3) Compared the three schemes in respect of clamp force and parts deflection, the 3^rd scheme is the poorest, which should not be adopted as can as possible, while the 1^st scheme and 2^nd scheme are reasonable.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 403-410
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.403
• Online since: February 2012
• Authors: He Sheng Liu, Ai Hua Xiong, Xing Yuan Huang, Jia Mei Lai
• Keywords: 3D Numerical Simulation, Clamp Force, Fiber Orientation, Gate Location, Injection Molding, Plastics Part Deformation, Short Glass Fiber-Reinforced PP

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