Saturday, September 19, 2009

Question # 136

Since 1963, X’s have been manufactured from a strong, resilient plastic known as acrylonitrile butadiene styrene (ABS). As of September 2008, the engineers use the NX CAD/CAM/CAE PLM software suite to model the elements. The software allows the parts to be optimized by way of mold flow and stress analysis. Prototype molds are sometimes built before the design is committed to mass production. The ABS plastic is heated to 232°C until at a dough-like consistency. It is then injected into the molds at pressures between 25 and 150 tons, and takes approximately 7 seconds to cool. The molds are permitted a tolerance of up to two thousandths of a millimeter. What is referred to here?