Generating the Parting-Line, Parting-Surface and Core/Cavity for an Injection Mold by using Face-Edge Graph

면-모서리 그래프를 이용한 사출 금형의 파팅 라인 및 파팅 서피스와 코어 캐비티 형상의 추출

In this paper, an efficient algorithm is proposed to find parting lines(PL) and generate parting surfaces(PS) for an injection mold design. We used a Face-Edge Graph which can be made by B-rep information of solid model. The graph is useful for finding the peripheral-loop edges for PL and the inner-loop edges for hole-patch. The PS can be generated automatically by selecting pre-defined direction lines. We can create a core and cavity molds by trimming the raw stock block with the PS and the upper/lower faces of a product model. We implemented proposed method with Unigraphics API functions and C language, and tesed on Unigraphics V15.