Fresh Approaches to Mold Steel Selection (10062)
By F.T. Gerson, originally presented at the 1991 annual technical conference of the Society of Plastics Engineers, Montreal. Despite the heavy investments in computer-aided design, manufacturing and engineering which have permitted mold making for the plastics industry to advance dramatically, alloy selection has largely been overlooked by molders, fabricators, extruders and even by mold makers themselves. New techniques, such as nickel vapour deposition to produce freeform shells for use as mold cavities, and the selection of low thermal expansion alloys, will help reduce current barriers to progress, as mold users demand better material properties for their molds.