화학공학소재연구정보센터
학회 한국화학공학회
학술대회 1997년 가을 (10/24 ~ 10/25, 충남대학교)
권호 3권 2호, p.3085
발표분야 이동현상
제목 이차원 축대칭 용기 제조를 위한 블로우 성형 공정의 수치모사 연구
초록 One of the primary industrial processes for forming both small and large, thin walled plastic parts is blow molding. In the blow molding process, the performance of the produced bottle (wall thickness distribution, mechanical properties . .) is determined both by the material properties and the operating conditions. In the present work, an isothermal axisymmetric blow molding simulation of generalized Newtonian fluid and viscoelastic fluid using Polyflow is presented. For viscoelastic fluid, a characteristic time must be specified in addition to the shear viscosity, and which may lead, in particular, to a high extensional viscosity. The technique involves an automatic remeshing technique for handling large mesh deformation, as well as a specific algorithm for detecting the contact of the fluid with the wall of the mold. Different inflation times between generalized Newtonian case and viscoelastic case, thickness distribution change at various times and thickness distribution at the end of process with different constitutive models will be discussed.
저자 여은정, 이승종
소속 서울대
키워드 parison; thickness distribution; extensional viscosity; remeshing; contacting
E-Mail ejyeo@plaza.snu.ac.kr or yej@chem04.snu.
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