Case studies sample of Precision welding for molds. High-precision welding in a rib configuration. Padding is welded on in order to reconfigure a rib section. Re-cutting is required and as a result the technician needs to weld without bubbling, marking or cracking. Shape recovery through welding. Shape recovery for blade edges. Welding of padding within a given frame. Redesign by welding half-padding. Edge padding in a circular configuration.