Injection Moulding of Polyetherimide Axi-Symmetric Elements

PEI계 플라스틱 축대칭 부품의 사출 성형에 관한 연구

  • 하영욱 (한양대학교 기계설계과) ;
  • 정태형 (한양대학교 기계공학과) ;
  • 이범재 (충남대학교 정밀공업화학과)
  • Published : 2002.12.01


This research covers the development of axi-symmetric plastic elements for injection molding with insert steel such as high stiffness Sabot. The functional requirements of sabot are concentricity and fracture resistance about vertical and horizontal forces. For these, an analysis of characteristics of PEI(polyetherimide) polymer is performed by standard test specimen with accordance of ASTM test guidance. Moldflow analysis and simulation of injection molding process are carried out in order not only to estimate of the warpage but also to predict the characteristics of residual stresses which both product and structure of mold may have. A new vertical side injection machine and transverse mold have been constructed. Results of the measuring concentricity and fracture test after molding of sabot are satisfied to design specification over Cp $ratio{\geq}1.33$. Finally, this technique needs more research application to others axi-symmetric elements having different radius with insert steel md structure analysis from now on.


  1. Journal of Materials Science v.36 no.19 The mech-anical properties of insert-molded poly etherimide (PEI)/C-fiber poly ether ketone(PEEK) composites Extrand, C. W.;Bhatt, S.
  2. Injection Mould Design(fourth edition) R. G. W. Pye
  3. 춘계학술대회 논문집 AUTO CAD를 이용한 플라스틱 사출금형 자동설계의 개발에 관한 연구 이태홍;이성수
  4. Handbook of Plastic Testing Technology(second edition) Vishu Shah
  5. Eng. Fracture Mech. v.21-4 A Simple plastic constitutive equation with vertex effect Gotoh, M.
  6. Flow Analysis of Injection Molds Peter Kennedy
  7. Computer Aided Plastic Application 한국시뮬레이션 기술
  8. Injection Molding Machines(third edition) Friedrich Johannaber
  9. Manufacturing Processes for Engineering Materials(second edition) Serope Kalpakjian