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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.
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.
물 사출성형의 잔류 벽두께에서 발생하는 기포 형성에 관한 연구
박형필(H. P. Park),김장환(J. H. Kim),최순호(S. H. Choi),차백순(B. S. Cha),김옥래(O. R. Kim),김동한(D. H. Kim),이병옥(B. O. Rhee) 한국소성가공학회 2012 금형가공 심포지엄 Vol.2012 No.9
This report was to study the fluid injection molding using both water and silicone oil. The effect of thermal properties was studied in terms of their influence on void formation. We were conducts heat transfer analysis and injection molding simulation for water and silicone oil. The temperature distribution of the polymeric material during the cooling process was analyzed. And the different specific volume for thickness effect voids formation. In experiment, the residual wall thickness in curved sections was thick around outer wall and around inner wall. And silicone oil was able to get the results of the void does not occur.