Meaning
Production molds and dies crafted from high-strength metals like hardened steel are utilized for long-term, high-volume manufacturing runs. Deploying hard tooling allows for the rapid production of millions of plastic or metal parts with minimal wear and high dimensional consistency. This tooling option requires a high initial investment but provides a very low per-unit cost over the life of the product.
The boundary of its utility is defined by the high cost of making any design changes once the mold is cut.
Material Selection
Hardened steel alloys are selected to withstand the high pressures and temperatures of continuous injection molding. These alloys resist abrasive wear from glass-filled resins. The durability of the metal ensures the mold retains its precision over millions of cycles.
Production Capability
High-volume production relies on these multi-cavity molds to produce multiple identical parts in a single cycle. The cooling channels within the steel are designed to optimize cycle times and prevent part warping. While the initial fabrication of the mold takes several weeks or months, the resulting parts require minimal post-processing.
This makes the method ideal for products that have finalized designs and high market demand.
Design Alteration
Modifications to the finished mold are difficult and expensive to execute. Any significant change to the part geometry requires sparks to erode the steel or the creation of a new insert. This limits the use of this tooling to stable, mature products.
