For any undercut region of a plastic molded part, a side core has to be designed to form the complex geometry while avoiding the interference between the injection mold and the plastic molded part (molding). Viewing undercuts as features in the context of injection mold design, this paper presents a new method to recognize both isolated and interacting undercut features extracted from a mold cavity or core. With the introduction of the face property and the EAFEG representation scheme, an undercut feature can be precisely defined by an undercut subgraph. Unlike conventional graph-based methods, which recognize features by graph matching, the proposed algorithm recognizes undercut features by searching the cut-sets of subgraphs. After recognizing undercut features, a Boolean operation is used to generate a side core for each undercut. Rules to eliminate the side core intersection are also presented for implementation.
Automatic Undercut Feature Recognition for Side Core Design of Injection Molds
Contributed by the Design Theory and Methodology Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received March 2003; revised October 2003. Associate Editor: L. C. Schmidt.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Ye , X. G., Fuh , J. Y. H., and Lee, K. S. (October 1, 2003). "Automatic Undercut Feature Recognition for Side Core Design of Injection Molds ." ASME. J. Mech. Des. May 2004; 126(3): 519–526. https://doi.org/10.1115/1.1737379
Download citation file:
- Ris (Zotero)
- Reference Manager