In this study, mold does not modify the overall. And core was developed as part of a separate. And not detached from the injection mold core part of the device only has to exchange. It has to perform the simulation of resin flow injection. Result of analysis, problems were observed. To create the change core of the four kinds of production prototypes and replace only with the exchange of change core operation of the injection. As a result, there were able to get a products with smooth surface.

Abstract
 1. 서 론
 2. 본 론
  2.1 개발 모델의 사출 성형 해석
  2.2 사출 금형 및 교환 코어의 제작
  2.3 사출 작업을 통한 시제품 제작
 3. 결 론
 참 고 문 헌

• 박정호(동아대학교 대학원 기계공학과) | J. H. PARK
• 김순경(동의과학대학 자동차과) | S. K. KIM