注射成型是热塑性塑料成型的主要方法之一，可以一次成型形状复杂的精密塑件。汽车业的快速发展要求汽车各个零部件快速的更新，因此，塑料模具设计和制造也显得尤为重要。本设计进行了汽车活塞托架注塑模设计，然后利用
UG NX 3的MOLDWIZARD模块功能结合产品的特性进行模具结构设计。确定了分型面、浇注系统，推出机构、冷却系统等，选择了注射机，计算了成型零部件的尺寸。并根据活塞零件注塑模具的要求对注射机的各参数进行了校核。最后用AutoCAD软件绘制了一套模具的装配图和零件图。
关键词：注塑模具 机构分析 模具设计
Abstract
The injection formation is one of main methods for thermoplastic Injection Mould, may complex model closely by a formation shape. With automobile industry requests fast development , automobile each spare part is used renewal, therefore, the design and manufacture of injection mould appears particularity importantly. This paper discussed the design plastic injection mould of Automobile Piston Bracket . Use UG NX 3 MOLDWIZARD module function of the characteristics of the products for mold design. The author determined the parting surfaces and the gating system and Release the organization, cooling system etc, choosed the injection molding machine，calculated the sizes of the molding parts. adopted to sprinkle directly in the design, make use of to keep lead the pillar direction fixed position, push the pole crest to anticipate, and carried on the choice to the material of the molding tool. According bracket injection mold parts to the requirements of the injection parameters of the machine was calibrated. And the author also drew a set of mold assembling chart and parts chart using AutoCAD software.
Keywords：Plastic of injection molding The organization analysis Mould design
