Determining Side-Cores of Plastic Moldings

Abstract

The determination of side-core for plastic moldings plays an important part in design process. Numerous studies have been investigated for side-cores recognition in literature. However, most of the existing methods have been developed based on the side-core surfaces of one region are known. In fact, it is difficult to identify relevant surfaces of one region. This study proposes a new algorithm of relevant surface attribution (RSA) based on topological relationship and V-map to automatically identify relevant surfaces of a side-core region. Then, the proposed approach defines the shape of side-core region as bounding surfaces and side-core direction. Finally, case studies are used demonstrating the applicability and usage of proposed approach.

Finding Pull Directions for Interference-free Mould Openings

“…However, this method fails for cases with irregular faces. Lin et al [2,3] use Visibility Map (V-map) algorithms to determine the pull direction of an undercut region based on the STL format. However, the interference between the core and moulding parts shows that their algorithm should be improved.…”