Abstract: The design of injection molds based on UG was exemplified by car's interiors with the emphasis on the parting mechanism including the designs of hole patch, parting lines, side parting, and core-pulling. The injection mold adopted two-cavities with balance layout, automatic falling of the cold material at point-gate, side parting, and core-pulling mechanisms. The purpose of automatic production was realized.

Key words: injection mould, UG software, 3-D Parting, side parting, core-pulling