A discrete model method for three-dimensional parting line search

Abstract

This paper presents a new approach for three-dimensional parting line search of injection moulded parts. In previous work, automatic parting line search is usually based on surface edge-loops. However, it is possible that edge-loops may not be present in a particular parting location. In the present research, all the surfaces in an initial solid model are divided into union parting surfaces and multiple parting surfaces. The multiple parting surfaces are decomposed into several union parting surfaces using the discrete model method before parting line search, creating the new edges as potential parting lines. Parting line search is completed based on the pure union parting surface model. Case studies show that the present research has solved some of the common problems faced in the previous work. © IMechE 2000.