The recognition of undercut features affects the determination of parting direction
parting lines and face
and it affects the generation of the core and cavity
and creation of the local tools as well as their actuating mechanisms. The determination of optimal parting direction depends on the determination of undercut feature. So
all the undercut features in a mold should be recognized first before the other design activities can be carried out. The definition of undercut feature is introduced and the undercut feature library was set up. The recognition of undercut features of die castings based on the attribute adjacent graph is realized.