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http://dx.doi.org/10.5762/KAIS.2011.12.7.2919

A Quality Stability Estimation of Shock-absorber Tube for automatic drawer  

Son, Jae-Hwan (Daegu Mechatronics & Materials Institute)
Kim, Young-Suk (School of Mechanical Engineering, Kyungpook National University)
Han, Chang-Woo (Division of Automobile, Yeungnam College of Science & Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.12, no.7, 2011 , pp. 2919-2924 More about this Journal
Abstract
The automatic drawer is used to absorb the movement shock and adjust its velocity when it opens and closes. The tube in shock-absorber is the cylindrical case which surrounds its parts and is made of acetal. The purpose of this study is to determine the quality stability of the tube in the shock-absorber in injection molding process. The tube which had been manufactured in the process with 4 cavity cooling unit was used. In this study, the analysis and test are carried out to determine its quality stability. Which are the quality analysis with numerical simulation and performance tests of the tube compared with one of foreign make. It is calculated that the injection press is 87.6 MPa and the deflections in X, Y, Z directions are ranged in 0.07~1.00 mm. When the researched tube is compared with the foreign made tube, the maximum bending compressive load is 231 kgf higher, average axial compressive load is 0.05 kgf higher, and the roughness(Ra) on the inner surface is $0.02\;{\mu}m$. lower. In the result, it is known that the quality of researched tube in injection mold process is stable and its performance is superior.
Keywords
Tube; Injection Molding Process; Quality Stability; Numerical Simulation; Performance Test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Choi, W.J., Sin, H.C., and Kwak, S.W., "Optimization of Processing Conditions in Injection Molding Using Genetic Algorithm", The Korean Society of Mechanical Engineers(A), Vol.24, No.10, pp. 2543-2551, 2000.   과학기술학회마을
2 Shen, C.Y., Yu, X.R., Li, Q., and Li, H.M., "Gate Location Optimization in Injection Molding By Using Modified Hill-Climbing Algorithm", Polymer-Plastics Technology and Engineering, Vol.43, No.3, pp. 649-659, 2004.   DOI
3 Erzurumlu, T. and Ozcelik, B., "Minimization of warpage and sink index in injection-molded thermo plastic parts using Taguchi optimization method", Materials and Design, Vol.27, pp. 853-861, 2006.   DOI
4 T. Kwon and etc trans., "Moldflow Design Guide", MunUnDang, pp.121-151, 2001.
5 Malloy, R.A., "Plastic Part Design for injection Molding: An Introduction", Hanser / Gardner Publishers, Inc., Cincinnati, pp.75-84, 1994.
6 Lee, B.H. and Kim, B.H., "Optimization of part wall thickness to reduce warpage of injection-molded parts based on the modified complex method", Polym.-Plast. Technol. Eng., Vol.34, No.5, pp. 793-811, 1995.   DOI
7 Park, J.C. and Kim, B.H., "Automated Molding Design Methodology to Optimize Multiple Defects in Injection Molded Parts," Jnt'I J. of the korean Society of Precision Engineering, Vol.1, No.1, pp. 133-145, 2000.
8 Jacques, M.S., "An Analysis of Thermal Warpage in Injection Molded Flat parts Due to Unbalanced Cooling", Polymer Eng. and Science, Vol.22, No.4, pp. 241-247, 1982.   DOI
9 Lam, Y.C. and Seow, L.W., "Optimzing flow in plastic injection molding", Journal of Materials processing Technology, Vol.72, pp. 333-341, 1997.   DOI
10 Min, B.H., "A study on quality monitoring of injection-molded parts", Journal of Materials Processing Technology, Vol.136, pp. 1-6, 2003.   DOI