Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Review on the Screw Configuration of Intermeshing Co-rotating Twin Screw Extruder

교합형 동방향 이축압출기의 스크류 조합에 대한 고찰

  • Lee, Shichoon (Department of Chemical Engineering, Dankook University) ;
  • Kim, Hyungsu (Department of Aero-Materials Engineering, Jungwon University)
  • 이시춘 (단국대학교 공과대학 화학공학과) ;
  • 김형수 (중원대학교 항공재료공학과)
  • Received : 2021.01.12
  • Accepted : 2021.03.06
  • Published : 2021.08.01
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Abstract

An intermeshing corotating twin screw extruder is mainly used for compounding polymeric materials. Twin screw extruder can adopt modular-type screw configurations, which directly controls the quality and productivity of the products. The types, shapes, and specifications of the screw and kneading elements are summarized, and the effects of screw configuration on the processabiliy of the materials are discussed. The principles of screw configuration universally applied to mass production of general-purpose resins are explained, and the guidelines of screw combination according to the roles of feeding, melt mixing, and metering zones are listed. The strategies of screw combination suitable for various cases, such as side feeding of liquid additives or inorganic fillers, reactive extrusion, devolatilization process, production of products requiring bright color and transparency, and processing of materials with low apparent specific gravity, are presented.

교합형 동방향이축압출기는 고분자재료의 컴파운딩에 주로 사용되는 기계이다. 이축압출기는 가공하는 재료와 생산제품에 적합한 스크류 조합을 설계하여 품질과 생산성이 양호한 컴파운딩공정을 구축할 수 있다. 스크류조합을 구성하는 스크류와 니딩 엘리먼트의 종류, 형상 및 사양에 대하여 정리하였고, 각각의 엘리먼트가 조합될 때 고분자 수지의 가공성에 미치는 영향에 대하여 알아보았다. 범용수지의 대량생산에 보편적으로 적용되는 스크류 조합의 원리를 설명하였고, 피딩, 용융혼련 및 미터링영역에 적합한 스크류조합의 방향과 사례를 나열하였다. 액상첨가제나 무기필러의 사이드피딩, 반응압출, 탈기공정, 밝은 색상과 투명도가 요구되는 제품의 생산 및 겉보기비중이 낮은 재료의 가공 등 각각의 경우에 맞는 스크류조합의 방향과 원리를 제시하였다.

Keywords

Acknowledgement

이논문은 2019년도 정부(교육과학기술부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(NRF-2019R1I1A2A01051610). 압출공정 실험에 도움을 주신 비전플라닉스의 조이근 대표, 이피존의 장준수 대표께 감사드립니다.

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