PRINTING LONG, THIN CORES FOR ALUMINUM SAND


CASTINGS


While the use of printed sand molds and cores has become increasingly common, two researchers investigated whether longer, thinner cores could hold up during the metalcasting process.


O


TOM MUELLER, VOXELJET, CANTON, MICHIGAN LARRY ANDRE, SOLIDIFORM, FORT WORTH, TEXAS


ne of metalcasting’s major advantages, when compared to other methods of manufacturing, is its ability to produce geometrically complex components. Metalcasting allows designers


to put metal only where it’s needed because liquid metal can fl ow into the open mold cavity. Often, cores are placed into a mold to form an interior


Fig. 1. The test geometry for the aluminum castings included a feeder bar and two down sprues.


Fig. 2. The test casting included six different core lengths of the same diameter.


Nov/Dec 2015 | METAL CASTING DESIGN & PURCHASING | 27


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