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부식 패턴이 적용된 블랙 사출 성형품의 색차 불량 원인과 대책에 관한 연구
장진혁(Jin-Hyeok Jang),남호동(Ho-Dong Nam),김현영(Hyun-Young Kim),안중근(Joong-Keun An),백주현(Joo-Hyun Beak) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Recently, one of the method to get rid of post-processing is used to roughen the surface by processing the etched pattern on the mold surface in the injection molded parts production. The method represent luxurious design by etched pattern on the surface without post processing. There is also the effect of cost reduction. However, when using ABS of the black color, a problem showing the surface color difference or dirt occurs in some cases. In this study, when using ABS of the black color, the cause of the color difference defects was analyzed. As a result, the cause of color difference occurs according to filling height of etched pattern. Factors are mold temperature, injection pressure, difference of the product thickness and so on. In this paper, It was analyzed in terms of the injection pressure.
사이드 게이트가 적용된 사출성형 평판 제품의 치수 편차에 대한 연구
장진혁(Jin-Hyeok Jang),강지혜(Ji-Hye Kang),김현영(Hyun-Young Kim),남호동(Ho-Dong Nam),안중근(Joong-Keun An) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
One of the important factors in the design of injection molded product is design for injection mold gate. Generally, direct or valve gates are applied to flat plate parts in the case of flat plate parts among various injection molded parts. The side gate is sometimes used because it can not be applied for the purpose of the parts of usage of aesthetic point. When the side gate is applied, dimensional deviation occurs in flow direction because the closer the gate is, the higher the injection pressure is received. In this paper, I would like to discuss what to consider when applying side gates to flat plate injection molded parts.