[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 6, pp.466-474

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

Print publication date 15 Dec 2020

Received 25 Aug 2020 Revised 09 Oct 2020 Accepted 09 Nov 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.6.466

사출성형공정에서 보압 조건에 따른 금형의 변형량 변화와 제품의 수축률 사이의 상관 관계에 대한 연구

이준한^a^{, b} ; 김종선^a^{, *}

Correlation between Mold Deformation and Shrinkage of Product Based on Packing Conditions during Injection Molding

Junhan Lee^a^{, b} ; Jongsun Kim^a^{, *}

aResearch Institute of Advanced Manufacturing & Materials Technology Shape Manufacturing R&D Department, Korea Institute of Industrial Technology
bDepartment of Mechanical Engineering, Dankook University

Correspondence to: ^*Tel: +82-32-670-3914 E-mail address: libra74@kitech.re.kr (Jongsun Kim).

Abstract

In this study, the mold deformation during injection molding was measured using an eddy current displacement sensor, and the correlation between the mold deformation and thickness shrinkage of the product was analyzed based on the packing pressure and packing time. Injection molding was performed using a five-inch light guide plate mold. During the injection phase, the maximum mold deformation was evaluated, and during the other phases, the time integral value of mold deformation was set as the evaluation index. In each phase, the factors were evaluated and compared for the maximum injection pressure, packing pressure, and packing time. In addition, the thickness shrinkage was measured and analyzed to evaluate the correlation with the mold deformation. Based on the evaluated correlations, guidelines on controlling the shrinkage by varying the maximum injection pressure, packing pressure, and packing time with mold deformation were developed.

Keywords:

Injection molding, Mold deformation, Packing pressure, Packing time, Thickness shrinkage

Acknowledgments

이 논문은 산업통상자원부의 기계산업핵심기술개발사업(Project No. KM200224, 10067766)의 지원으로 진행되었습니다.

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Junhan Lee

Research assistant in the Research Institute of Advanced Manufacturing & Materials Technology Shape Manufacturing R&D Department, Korea Institute of Industrial Technology. Ph. D. student in the Department of Mechanical Engineering, Dankook University.His research interest is injection molding and mold.

E-mail: mmm7527@kitech.re.kr

Jongsun Kim

Principal researcher in the Research Institute of Advanced Manufacturing & Materials Technology Shape Manufacturing R&D Department, Korea Institute of Industrial Technology.His research interest is injection molding and mold.

E-mail: libra74@kitech.re.kr