The structure characteristics of the exterior-shell of bottom cover of rat mark were introduced.And the processes of the injection mould of bottom cover of rat mark were stated in detailed.Punch and matrix of bottom cover of rat mark apparatus and the structruce of angled-lift splits and their technical difficulty were analyzed.
关键词：商务通上盖、注射模、凸模、凹模、斜滑块。
Key words: bottom cover of rat mark 、injection mould、punch、matrix、angled-lift splits
