[ Article ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 32, No. 3, pp.129-134

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2023

Received 17 Apr 2023 Revised 15 May 2023 Accepted 16 May 2023

DOI: https://doi.org/10.7735/ksmte.2023.32.3.129

대형 3D프린팅 부품 제작을 위한 이축 압출 스크류 헤드 기반 적층제조 시스템 개발

이필호^a^{, *} ; 하태호^a ; 정민교^a ; 최준필^a ; 양창근^b

Development of Twin-screw Extrusion Additive Manufacturing System for Large-scale Parts

Pil-Ho Lee^a^{, *} ; Taeho Ha^a ; Min-Kyo Jung^a ; Joon Phil Choi^a ; Chang-Geun Yang^b

aDepartment of 3D Printing, Korea Institute of Machinery & Materials
bJoong Ang Foundry Pattern

Correspondence to: ^*Tel.: +82-42-868-7786 E-mail address: pilho_lee@kimm.re.kr (Pil-Ho Lee).

Abstract

Large-scale material extrusion additive manufacturing is a promising alternative to the wooden mold industry, which faces challenges such as poor working conditions and an aging workforce. However, the current commercial single-screw extrusion heads have limitations owing to their weight and volume, requiring the use of expensive equipment. This study proposes the development of a twin-screw extrusion head that can be easily installed on an existing large-scale CNC milling machine, creating a prototype for additive manufacturing based on screw extrusion. The developed prototype is used to evaluate the extrusion additive manufacturing of ABS polymer composite material impregnated with glass fiber, the mechanical properties of printed specimens, the microstructure of the specimen fracture surface, and the performance of additive manufacturing shape implementation. The experiment confirmed that the proposed system achieved precision in the laminated shape and mechanical performance and could replace the wood pattern process in the existing wooden mold industry.

Keywords:

Polymer process, Additive manufacturing, Material extrusion, Wood foundry mold, Composite

Acknowledgments

본 연구는 한국기계연구원 기관 기본사업 차세대 고성능 모터 개발을 위한 3D프린팅 장비개발(NK242J) 및 대형 3D프린팅 부품 제작을 위한 가변 스크류 압출 적층헤드 개발(KN014D) 으로 수행되었습니다.

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Pil-Ho Lee

Senior Researcher in Korea Institute of Machinery & Materials. His research interest is Process and System Development of Additive Manufacturing System.

E-mail: pilho_lee@kimm.re.kr

Taeho Ha

Principal Researcher in Korea Institute of Machinery & Materials. His research interest is Additive Manufacturing Process and Equipment Development.

E-mail: taehoha@kimm.re.kr

Min-Kyo Jung

Senior Researcher in Korea Institute of Machinery & Materials. His research interest is Design for Additive Manufacturing by using FEM.

E-mail: mkjung@kimm.re.kr

Joon Phil Choi

Senior Researcher in Korea Institute of Machinery & Materials. His research interest is Material and Process Development for Net-shape Technologies.

E-mail: jpchoi@kimm.re.kr

Chang-Geun Yang

Director in Joong Ang Foundry Pattern. His research interest is Design of Foundry Pattern.

E-mail: jmb2003@hanmail.net