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박형필(H. P. Park),차백순(B. S. Cha),전용준(Y. J. Jeon),황병욱(B. W. Hwang),정상현(S. H. Jung),이광영(K. Y. Lee),황성일(S. I. Hwang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In general, precision plastic lens mold applied branched runner system of H-Type. However, filling imbalance of the mult-cavity was occurred by asymmetrical shear distribution. For this reason, the accuracy and the quality of the lens decrease. In this study, the lens mold with radial runner system of X-type lens was applied to improving the quality of lens parts. We carried out CAE analysis of lens mold with branched runner system of H-Type and radial runner system of X-type and we examined the mold temperature, temperature distribution in runner system and shrinkage distribution.
금형 급속가열-냉각이 적용된 이생사출성형의 플래쉬 발생 예측
박형필(H. P. Park),차백순(B. S. Cha),이병옥(B. O. Rhee) 한국소성가공학회 2009 금형가공 심포지엄 Vol.2009 No.11
The mold rapid heating and cooling technology is applied to the thin-walled two color injection molding producing high-quality electronic products. In case of thin-walled two color injection molding, the flash is often generated when molten polymer flows into small gap at parting line in mold with high injection pressure or under unbalanced clamp force condition. In this study, we investigated the effect of processing conditions on flash generation using injection molding CAE. We found that the flashing could be caused by the structural imbalance of the moving plate in the clamping state. The predicted flash shape was compared with experimental result.
자동차용 Band Cable의 유동성 향상에 관한 연구
박형필(H. P. Park),차백순(B. S. Cha),최영섭(Y. S. Choi),최현국(H. K. Choi) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Recently various types of rapid mold heating/cooling technology have been developed in order to improve surface quality of products and flow ability of polymer. In this study, injection molding CAE for rapid mold heating and cooling was performed to analyze molding characteristics of the automobile band-cable. The effects of the rapid mold heating and cooling technology on the molding characteristics and pressure distribution were compared with conventional injection molding. Finally, we evaluated component technologies such as rapid mold heating and cooling system, mold materials, vacuum system through experiments to solve molding problems.