Safety is very important during injection process. It's meaningful to analyse internal connections for reasonable injection processing technology, reasonable manufacturing molds per part drawings and even select injection processing equipment. Precision injection has to be safe. they have difference in speed between precision injection and general injection, high pressure or super high injection and high speed injection are adopted in precision injection for lower shrinkage rate. Concluded as above reasons, For precision injection mold design, not only general plastic molds design have to be considered, below should also be taken into consideration: