Murray says cores are the real promise of 3D sand printing. To create the core, the pattern shop supplies a machined mold into which the sand is packed-a core box. The sand tooling that does this is the core, another mold component. Rather than competing with any one existing process, additive manufacturing does something larger: It collapses the overall sequence of processes, and it rewrites many of the established manufacturing rules.Įmpty spaces within the casting (for example, a passage through the cast part) have to be defined by solid sand. That is, it does not directly take the place of processes such as CNC machining or conventional patternmaking, largely because its successes come from enabling parts that these conventional processes could not have produced. As Hoosier Pattern’s example shows, 3D printing, or additive manufacturing, does not fit neatly into established manufacturing categories. For this reason, this company’s introduction of 3D printing is interesting not just because of its implications for casting, but also because of what it illustrates about 3D printing. Hoosier Pattern has around 30 CNC machine tools. 3D printing of sand potentially makes casting both more efficient and more effective at the same time.Ī pattern shop is a machine shop. However, this change both simplifies the casting process and overcomes many of its previous limitations.
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