Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Design of Gate Locations, Molding Conditions, and Part Structure to Reduce the Warpage of Short-Fiber Reinforced Injection Molded Part

단섬유 보강 사출성형품의 휨 감소를 위한 게이트 위치, 성형 조건 및 제품 구조 설계

  • 최두순 (인하공업전문대학 기계설계과)
  • Published : 2008.10.01
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Abstract

Fiber reinforced injection molded parts are widely used in recent years because of their improved properties of materials such as specific stiffness, specific strength, and specific toughness. The demand for products with high precision is increasing and it is important to minimize the warpage of the products. The warpage of short-fiber reinforced product is caused by anisotropy induced by fiber orientation as well as the residual stresses induced during the molding process. In order to reduce the warpage of the part, it is important to achieve successful mold design, processing control, and part design. In the present study, the design of gating system, molding condition, and part structure were carried out and verified with numerical analysis using a commercial CAE code Moldflow. The numbers and locations of gates were iteratively determined, and the molding conditions which can decrease the warpage of the part were investigated. Finally, slight structural modification of the part was conducted to reduce the locally concentrated warpage.

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References

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  1. A Study on the Part Shrinkage in Injection Molded Annular Shaped Product for Glass Reinforced Polycarbonate vol.48, pp.4, 2013, https://doi.org/10.7473/EC.2013.48.4.300