分析了PET瓶坯的成型工艺，包括PET 树脂的干燥、模具工作部分的温度控制等，阐述了热流道注塑模的结构及工作原理。
The forming technology was analyzed, including drying of PET resin and the temperature control of mold work section. The construction of a hot runner mold and its mechanism were described.
分析了叉车平衡重后盖的成形工艺，介绍了模具结构及主要工作部分的设计。
The forming technology of balance weight cover of fork truck is analyzed. Die structure and working part design is also introduced.
分析了冷挤压毛坯质量对模具的工作部分（上、下凸模和凹模）的损坏形式和寿命的影响，指出了保证毛坯质量应采取的措施。
The effect of blank quality in cold extrusion on the damage way and service life of working parts (mould and die)is analysed, and some countermeasures presented.
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