Abstract: A method of making an interior trim panel for attachment to structure of a vehicle includes the steps of loading a trim blank into a cavity of a first side of a mold and depositing a molten thermoplastic material onto a core on the first side of the mold. The method also includes the steps of closing the mold, moving the slide in a channel of the core, and injecting a molten thermoplastic material into a second side of the mold to form the interior trim panel.

Abstract: A frangible cover for a vehicle air bag assembly is provided. The cover includes at least one tear seam across the inner surface of the cover which tear seam is substantially invisible at the exterior surface. The tear seam is made up of a multiplicity of spaced apart depressions of substantially uniform depth extending from the inner surface of the cover towards the outer surface of the cover thereby reducing the thickness of the cover to a substantially uniform level at the locations of the depressions. The depressions are spaced at substantially regular intervals along the length of the tear seam substantially without preferential concentration of the depressions at any one location along the tear seam. The depressions may be of variable width along the length of the tear seam as measured in the direction substantially transverse to the tear seam.