◆ Compared with ordinary ultrasonic mold, factory production of mold more long withstand the shock of the ultrasonic frequency from crack control line design and high quality imported aluminum alloy as ultrasound mold, the most important components: mode - uniform application of expensive, high toughness, high rigidity and high-quality imported aluminum extrusions. For larger molds, the design of crack control line is particularly important, which can be fundamental to avoid profiles cracking phenomenon in the long high-frequency oscillation.