[ Technical Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 28, No. 1, pp.56-61

ISSN: 2508-5107 (Online)

Print publication date 15 Feb 2019

Received 11 Dec 2018 Revised 07 Jan 2019 Accepted 08 Jan 2019

DOI: https://doi.org/10.7735/ksmte.2019.28.1.56

PVC소재를 사용한 사출성형 금형용 Hot runner 유로설계 연구

박시환^a^{, *}

Hot Runner Flow Channel Design for Injection Molds Using PVC Material

Si-Hwan Park^a^{, *}

aMechanical Engineering, Ulsan College, 57, Daehak-ro, Nam-gu, Ulsan 44610, Korea

Correspondence to: ^*Tel.: +82-52-279-3121 Fax: +82-52-279-3137 E-mail address: shpark3@uc.ac.kr (Si-Hwan Park).

Abstract

The thermal stability of PVC was analyzed using TGA and GC/MS device as the first step in the development of a hot runner mold for injection molding using PVC material. Flow analysis was then performed to investigate and improve the flow stagnation region. Finally, the hot runner was redesigned. The TGA test confirmed that pyrolysis occurred within the processing temperature. To investigate the flow stagnation phenomenon, flow analysis was performed. To minimize this process, we proposed a method to convert the isovelocity surface results from the flow analysis results into CAD format prior to redesign. Flow analysis for the hot runner was obtained using the proposed method. As a result, the portion of the fluid retention with the flow velocity staying in the hot runner for one cycle could reduce the gap from the wall by 33%.

Keywords:

PVC, Injection molding, Hot runner, Pyrolysis, Flow channel

Acknowledgments

이 연구는 이 논문은 2016년 울산과학대학교 교내학술연구비 지원에 의해 수행됨.

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