本文简述了现有SJ - 7100气动标记打印机的工作原理，分析了气动打印头工作过程中的各个环节。
In the paper, operating principles of existing SJ-7100 Pneumatic Industry Stylus Movement are presented, each segment of working processes of Pneumatic Industry Stylus Movement's head are analyzed.
分析了打印机导纸器塑件工艺特点，介绍了注塑模结构、浇口设计方案和模具工作过程。
It analyzed the technological characteristics of plastics article of leading paper device of printer, and introduced the structure of injection mould, the gate design, and the work process of mould.
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