[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 6, pp.435-440

ISSN: 2508-5093 (Print) 2508-5107 (Online)

Print publication date 15 Dec 2020

Received 05 Oct 2020 Revised 06 Nov 2020 Accepted 11 Nov 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.6.435

다공성 알루미늄 소재를 적용한 진공 박막성형 금형개발

강형선^a ; 이성현^a^{, *}

Development of Vacuum Thin-Film-Forming Mold using Porous Aluminum

Hyung-Sun Kang^a ; Sunghyun Lee^a^{, *}

aDepartment of Mechanical Design, Chosun College of Science ＆ Technology

Correspondence to: ^*Tel: +82-62-230-8827 E-mail address: leepro@cst.ac.kr (Sunghyun Lee).

Abstract

In an injection-molding operation that applies vacuum technology, the thin-film sheet product must be molded to a uniform thickness. However, the dike part of the indoor panel of a refrigerator undergoes large variations in its thickness and a high defect rate. Therefore, porous aluminum was used so that a uniform distribution of vacuum pressure can be applied to the entire acrylonitrile butadiene styrene resin in the indoor panel. The pore density of porous aluminum was determined using finite-element analysis, and the products from the developed mold were inspected for corner thickness, cotton flannel marks, and air-hole marks. The defect rate was significantly reduced, and the appearance quality of the product was improved. The improved thin-film-forming technology is expected to greatly contribute to the development of the mold industry.

Keywords:

Vacuum forming, Thin film-forming technology, Porous metal, Indoor panel

References

Lee, J. K., Virkler, T. L. Scott, C. E., 2001, Influence of initial sheet temperature on ABS thermoforming, Polymer Engineering & Science, 41:10 1830-1844. [https://doi.org/10.1002/pen.10880]
Yuan, H. L., 2012, The Design of the Vacuum Plastics- Absorption Mould for Fridge Freezer Inner Shell, Advanced Materials Research, 530 29-33. [https://doi.org/10.4028/www.scientific.net/AMR.530.29]
Lee, H. J., Ahn, D. G., Lee, S. H., Ki, J. C., Ko, J. H., 2016, Three-Dimensional Thermoforming Analysis of an Inner Case with Three Cavities for Refrigerator, Transactions of the Korean Society of Mechanical Engineers A, 40:5 505-511. [https://doi.org/10.3795/KSME-A.2016.40.5.505]
Hongling, Y., Guoquan, F., 2012, Refrigerator Cabinet Foaming Mold Accurate Design and Manufacture based on the Vacuum Deformation Mechanism, 2nd International Conference on Electronic & Mechanical Engineering and Information Technology, 1342-1346.
Lokensgard, E., 2016, Industrial Plastics: Theory and Applications, Cengage Learning, USA.
Lee, S. J., Yoo, K. B., Rho, B. S., Park, S. H., 2019, Automatic Design of Hot Air Process for Deburring of Blow Injection Molded Products, Journal of the Korean Society of Manufacturing Technology Engineers, 28:4 232-237. [https://doi.org/10.7735/ksmte.2019.28.4.232]
JISANG CO., L., 2011, Vacuum forming apparatus capable of undercut forming for door panel of refrigerator, KR Patent: 20-0455008.
Jung, W. Y., Park, S. H., 2012, Performance Evaluation of Flexural Reinforcement Plate Combined with Porous Aluminum Laminate and GFRP Composites, Construction and Environment Research Institute, 7:1 65-72.
Seo, Y. I., Kim, Y. M., Lee, Y. J., Kim, D. G., Lee, K. H., Kim, Y. D., 2009, The Formation of Hybridized Porous Structure of Al Alloy by Alkali Surface Modification, Journal of Korean Powder Metallurgy Institute, 16:1 22-27. [https://doi.org/10.4150/KPMI.2009.16.1.022]
Noh, J. S., Chin, W. B., 2006, Fabrication of Nanowellstructured and Nanonetstructured Metal Films using Anodic Porous Alumina Film, Applied Science and Convergence Technology, 15:5 518-526.
Kim, J. S., Lee, H. J., 2003, The Performance Characteristics of the Open Celled Aluminum Foam Applied for Heat Dissipation, Journal of the Korean Solar Energy Society, 23:2 91-98.
Bang, J. O., Lee, H. S., Jung, T. K., Lee, M. H., Kim, B. S., Jung, S. B., 2011, Development of Heat Shielding Part for RFID Tag using Porous Aluminum Alloy, Journal of Korean Powder Metallurgy Institute, 18:2 135-140. [https://doi.org/10.4150/KPMI.2011.18.2.135]
Lee, Y. H., Han, E. D., Kim, B. H., Seo, Y. H., 2017, Evaluation of Mechanical Tearing based Cell Disruption Capability to ShapeNanostructures formed on Nanoporous Alumina Filter, Journal of The Korean Society of Manufacturing Technology Engineers, 26:1 1-5. [https://doi.org/10.7735/ksmte.2017.26.1.1]
Shim, J. D., Byun, J. Y., 2015, 2006, Production Processes of Porous Metals and Their Applications, Korean Journal of Materials Research, 25:3 155-164. [https://doi.org/10.3740/MRSK.2015.25.3.155]
Liu, P., Chen, G. F., 2014, Porous Materials: Processing and Applications, Elsevier Science, USA.

Hyung-Sun Kang

Associate professor in the Department of Mechanical Design, Chosun College of Science ＆ Technology.His research interest is reliability of mechanical system and mold.

E-mail: hskang@cst.ac.kr

Sunghyun Lee

Assistant professor in the Department of Mechanical Design, Chosun College of Science ＆ Technology.His research interest is the design and health assessment of the mechanical system.

E-mail: leepro@cst.ac.kr