Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
권호 표지

A study on the improvement of impregnation on the surface of injection-molded thermoplastic woven carbon fabric composite

열가소성 직물탄소복합소재 사출 성형품의 표면 함침 개선에 관한 연구

  • Jeong, Eui-Chul (Department of Mechanical Engineering, Dankook University) ;
  • Yoon, Kyung-Hwan (Department of Mechanical Engineering, Dankook University) ;
  • Lee, Sung-Hee (Department of Molding & Metal Forming R&D, Korea Institute of Industrial Technology)
  • 정의철 (단국대학교 기계공학과) ;
  • 윤경환 (단국대학교 기계공학과) ;
  • 이성희 (한국생산기술연구원 금형성형연구부문)
  • Received : 2021.09.13
  • Accepted : 2021.09.30
  • Published : 2021.09.30
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Abstract

In molding of continuous fiber-reinforced thermoplastic composites, it is very difficult to impregnate between the reinforcements and the matrix since the matrix has a high melting temperature and high viscosity. Therefore, most of composite molding processes are divided in the manufacturing processes of intermediate materials called prepreg and the forming of products from intermediate materials. The divided process requires additional facilities and thermoforming, and they increase the cycle time and cost of composite products. These problems can be resolved by combining the continuous fiber-reinforced composite molding process with injection molding. However, when a composite material is manufactured by inserting woven fabric into the injection mold, poor impregnation occurs on the surface of the molded product. It affects the properties of the composites. In this paper, through an impregnation experiment using cores with different heat transfer rates and pore densities, the reason for the poor impregnation was confirmed, and molding experiments were conducted to produce composite with improved surface impregnation by inserting the mesh. And also, the surface impregnation and deformation of composites molded using different types of mesh were compared with each other.

Keywords

Acknowledgement

본 연구는 "중소벤처기업부 구매조건부신제품개발사업(S2951123)"에 의행 수행되었습니다.

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