Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Simulation of Warpage and Residual Stress of Liquid Crystal Polymer Injection Molded Pare with Multi-holes and Thin Wall

액정고분자 사출성형 다공성 박판의 잔류응력과 휨해석

  • 정만석 (한양대학교 섬유고분자공학과, 기능성고분자 신소재연구센터) ;
  • 김성훈 (한양대학교 섬유고분자공학과, 기능성고분자 신소재연구센터)
  • Published : 2002.10.01
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Abstract

CAE(Computer Aided Engineering) simulations of thin-wall injection molded parts of thermotropic liquid crystal polymer and common thermoplastics were performed. Micro-injection molded parts composed of thermortopic liquid cyrstal polymer are widely used in electronics and tole-communication terminals. The present paper deals with the development of efficient formulation for numerical integration, by which problems involving thin complex injection molded products can be solved to predict residual stresses, shrinkage, and warpage. Parameters of processing condition (material, thickness, packing pressure, flow rate, cooling stage, and mold temperature) result in diverse variations of residual stresses, total deflection, and warpage shape. The optimal processing conditions are obtained for the least warpage and internal stress of LCP micro-injection molded parts.

Keywords

References

  1. ANTEC Proceeding Shrinkage and Warpage Behavior of Injection Molded Nylded Nylon 6 and PET Bar and Plates C. G. Lee;A. Dubin
  2. ANTEC Proceedings Integrate Simulation to Predict Warpage of Injection Molded Parts T. Matsuoka;J. I. Takabatatake;Akoiwai;Y. Inoue;S. Yamamoto;H. Takahashi
  3. Rheology and Processing of Liquid Crystal Polymer D. Acierno;A. A. Collyer
  4. J. Korean Flber Soc. v.38 Simulation of Liquid Crystal Polymer Injection Molded Parts with Thin Wall and Holes M. S. Chung;S. H. Kim
  5. J. Eng. Mater. Tech. v.115 Integrated Simulation of Fluid Flow and Heat Transfer in Injection Molding for Shrinkage and Warpage H. H. Chiang;K. Himasekhar;N. Santhanam;K. K. Wang
  6. Mold Flow Mold Flow Training Manual
  7. Moldflow Pty. Ltd. Warpage Design Principles
  8. Moldflow Pty. Ltd. Moldflow Data Theory C. Austin;P. Kennedy
  9. Polym. Eng. Sci. v.38 Residual Stresses, Shrinkage and Warpage of Complex Injection Molded Products: Numerical Simulation and Experimental Validation K. K. Kabanemi;H. Vaillancourt;H. Wang;G. Salloum
  10. J. Non-Newt. Fluid Mech. v.84 Thermoviscoelastic Simulation of Thermally and Pressure-induced Stresses in Injecton Moulding for the Prediction of Shrinkage and Warpage for Fiberreinforced Thermoplastic R. Zheng;P. Kennedy;N. Phan-Thien;X. Fan
  11. J. KSME A v.24 Warpage Analysis of Fiber Reinforced Injection Molded Parts S. T. Chung;J. G. Kim;B. H. Koo
  12. Comput. Struct. v.19 A Compatible Triangular Element Including Vertex Rotations for Plane Elasticity Analysis D. J. Allman