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학술저널
저자정보
정의철 (한국생산기술연구원 금형기술그룹) 손정언 (한국생산기술연구원 금형기술그룹) 민성기 (창대정밀 기술연구소) 김종헌 (창대정밀 기술연구소) 이성희 (한국생산기술연구원 금형기술그룹)
저널정보
한국금형공학회 한국금형공학회지 한국금형공학회지 제13권 제2호
발행연도
2019.1
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1 - 5 (5page)

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In this study, micro cellular injection molding of automobile head lamp housing with uneven thickness structure was performed to obtain improvement on deformation and light-weight of the part. The thickness of the presented model was uniformly modified to control the deformation of the molded part. In order to maximize the lightweight ratio, the model having an average thickness of 2.0 mm were thinly molded to an average thickness of 1.6 mm. GFM(Gas Free Molding) and CBM(Core Back Molding) technology were applied to improve the problems of the conventional foam molding method. Equal Heat & Cool system was also applied by 3D cooling core and individual flow control system. Warpage of the molded parts with even cooling was minimized. To improve the mechanical properties of foamed products, complex resin containing nano-filler was used and variation of mechanical properties was evaluated. It was shown that the weight reduction ratio of products with light-weighted injection molding was 8.9 % and the deformation of the products was improved from the maximum of 3.6 mm to 2.0 mm by applying Equal Heat & Cool mold cooling system. Also the mechanical strength reduction of foamed product was less than 12% at maximum.

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