[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 6, pp.564-569

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

Print publication date 15 Dec 2018

Received 15 Nov 2018 Revised 20 Nov 2018 Accepted 10 Dec 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.6.564

차량 범퍼 하부에 대한 사출성형 변형해석

최병주^a ; 강일재^b ; 전용호^a ; 홍민성^a^{, *}

Deformation Analysis for Injection Molding of Lower Stiffener in Automobile Bumper

Byungjoo Choi^a ; Il-Jae Kang^b ; Yongho Jeon^a ; Min-Sung Hong^a^{, *}

aDepartment of Mechanical Engineering, Ajou University, 206, Worldcup-ro Yeongtong-gu, Suwon, Gyeonggi-do, 16499, Korea
bDepartment of Mechanical Engineering, Graduate School of Engineering, Ajou University, 206, Worldcup-ro, Yeongtong-gu, Suwon, Gyeonggi-do, 16499, Korea

Correspondence to: ^*Tel.: +82-31-219-2526 Fax: +82-31-219-1611 E-mail address: mshong@ajou.ac.kr (Min Sung Hong).

Abstract

The lower stiffener for an automobile bumper has a problem in that deformation occurs during injection molding. This degrades the impact absorption properties of the stiffener. Therefore, research on reducing the deformation during the molding process is required. In this study, the filling time, maximum pressure, maximum mold clamping force, and solidification time of the injection molding process were analyzed as the basis for the research. To analyze the cause of deformation and to improve the quality of the parts, a series of design changes and analyses were performed. As a result, an excellent design was derived that reduces deformation compared to the preliminary design.

Keywords:

Lower stiffener, Polypropylene, Injection molding analysis, Shrinkage deformation

Acknowledgments

이 연구는 2018년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원을 받은 연구입니다(No.20000665).

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