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How to utilize the DOE methodology to inform your mold grooming decisions and maximize part capability.

Often in the world of mold-building for injection molding, the initial rough cut of the mold is made “steel safe”. This provides two benefits: removing additional steel from the mold is typically easier than adding steel and if ran, and the injection molding process itself can inform the mold-builder of how the parts will shrink post-molding. This technique makes the grooming process efficient and helps to understand shrink or other potential issues that should be addressed before final mold grooming occurs. The injection molding process parameters utilized and developed to generate this process then become critical to the future success of that specific mold. Rather than utilizing a single point of reference for mold grooming, this conversation will highlight how the data utilized via a DOE can provide valuable insight to the mold-builder. This methodology not only maximizes part capability but also addresses process robustness relative to part specifications. In addition, a strategy can be devised to groom steel relative to cycle time reduction.