Articles & Issues

Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

CAE를 이용한 사출성형의 최적화

Application of CAE in Injection Molding Process

김범호 장우진¹ 김정훈¹ 조정환¹ 박영훈² 최순자^1†

Beomho Kim Woojin Jang¹ Junghoon Kim¹ Junghwan Cho¹ Yung-Hoon Park² Soonja Choe^1†

현대 플라스틱 엔지니어링, 343-856 충남 당진군 석문면 통정리 1233 ¹인하대학교 화학공학과, 고분자공학연구소, 402-751 인천시 남구 용현동 253 ²순천대학교 고분자공학과, 540-742 전남 순천시 매곡동 315

Hyundai Engineering Plastics Co., Ltd., 1233 Tongjung-li, Seokmun-myun, Tangjin-gun, Chungnam 343-856, Korea ¹Department of Chemical Engineering, Institute of Polymer Science and Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea ²Dept. of Polymer Science and Technology, Sunchon National University, 315 Maegok-dong, Sunchon, Chonnam 540-742, Korea

sjchoe@inha.ac.kr

HWAHAK KONGHAK, October 2003, 41(5), 577-584(8), NONE

Download PDF

Abstract

사출성형 공정조건에 따른 다양한 형태의 열과 변형 이력으로 최종 성형품의 기계적 물성이 현저히 달라지므로, A사의 29" TV backcover를 대상으로 제품의 디자인 과정에서 수지의 충전에 영향이 큰 제품의 두께를 부분적으로 조절하고 Mold Flow사의 CAE software(S/W)를 이용하여 유동현상을 해석하였다. 또한 실제로 측정한 점도와 전단속도 값(local database)과 표준 실험 장치에서 얻어낸 값(standard database)에 의한 해석결과를 비교 검토하였다. 그 결과 29" TV backcover 성형과정에서 수지의 유동 불균형을 해소하기 위하여, 유동에 정체가 발생하는 부분의 두께는 두껍게 하고 유동이 빠른 부분의 두께는 얇게하여 이상적인 수지의 유동패턴을 구현하였다. 실측한 local database와 기존의 standard database에 의한 해석 결과를 비교하여, 실측 점도가 다소 높고, 온도 분포의 편차가 조금 넓었음에도 불구하고, 두 가지 database에 의한 해석 결과는 비슷 하였다.

Injection molding process is influenced by the injection conditions such as various thermal history and deformation processes that affect mechanical properties of the fabricated product. The design of the 29-inch TV backcover modified with the alteration of the thickness of special parts. Then the flow analysis was performed using the CAE S/W of the Mold Flow Company. In addition, the analysis was performed using the measured viscosity(local database) at various shear rates and_x000D_ the results were compared with those using the standard database. In order to reduce the unbalanced flow of the molten resin, the thickness of the part, where the flow speed was slow, increased, while that of the part, where the flow speed was fast, reduced. As a result, the optimum condition based on the above modification of the special part of TV backcover is selected in terms of idealized flow pattern. In addition, the analyses based on the local database and the standard database showed no distinctive difference, although the measured viscosity was slightly higher and the temperature distribution was broader than by the standard database.

Keywords

Injection Molding CAE (Computer Aided Engineering) Filling Phase Analysis Packing Phase Analysis

References

Spencer RS, Gilmore GD, J. Colloid Sci., 6, 118 (1950)
Spencer RS, Gilmore GD, J. Appl. Phys., 21, 523 (1950)
Kamal MR, Kenig S, Polym. Eng. Sci., 12, 294 (1972)
Kamal MR, Kenig S, Polym. Eng. Sci., 12, 302 (1972)
Ballman RL, Shusman T, Toor HL, Ind. Eng. Chem., 51, 847 (1959)
Harry DH, Parrot RG, Polym. Eng. Sci., 10, 209 (1970)
Lord HA, Williams G, Polym. Eng. Sci., 15, 569 (1975)
Tadmor Z, Gogos CG, Principles of Polymer Processing, John Wiley & Sons, New York (1979)
Kamal MR, Kuo Y, Doan PH, Polym. Eng. Sci., 15, 863 (1975)
Wang KK, Stevenson JF, Hieber CA, "Computer-Aided Injection Molding Syster," CIMP Progress Report, Mo. 4, 9 (1977)
Tadmor Z, Broyer E, Gutfinger C, Polym. Eng. Sci., 14, 660 (1974)
Friedl CF, McCaffrey NJ, "Crystallization Prediction in Injection Molding," SPE ANTEC Technical Papers, 50, 330 (1991)
Bakerdjian Z, Kamal MR, Polym. Eng. Sci., 17, 96 (1977)
White JL, Dee HB, Polym. Eng. Sci., 14, 211 (1974)
Chinag HH, "Simulation and Verification of Filling and Post-Filling Stages of the Injection-Molding Process," Ph.D. Thesis, University of Cornell, Ithaca, New York (1989)
Sherbelis G, Friedl C, "The Importance of Low Temperature Viscosity to CAE Injection Molding Simulation," SPE ANTEC, 954 (1992)
Dietz W, White JL, Clark ES, Polym. Eng. Sci., 18, 277 (1978)
Chung TS, Ryan ME, Polym. Eng. Sci., 21, 271 (1981)
Sanschagrin B, Polym. Eng. Sci., 23, 431 (1983)
Kamal MR, Lafleur PG, Polym. Eng. Sci., 26, 103 (1986)
Wang KK, Shen SF, Cohen C, Hieber CA, Ricketson RC, Wang VW, Emerman S, "Integration of CAD/CAM for Injection Molded Plastic Parts, CIMP Progress Report," No. 12, 12 (1986)
Wang KK, Shen SF, Cohen C, Hieber CA, "Integration of CAD/CAM for Injection Molded Plastic Parts, CIMP Progress Report," No. 13, 13 (1987)
Austin C, Kennedy P, "Moldflow Data Theory," Moldflow Pty. Ltd. (1992)
Min N, Kim SW, Park CS, Lee MH, Lee KJ, HWAHAK KONGHAK, 35(4), 468 (1997)