注射成型是熱塑性塑料成型的主要方法之一，可以一次成型形狀復雜的精密塑件。汽車業的快速發展要求汽車各個零部件快速的更新，因此，塑料模具設計和制造也顯得尤為重要。本設計進行了汽車活塞托架注塑模設計，然后利用
UG NX 3的MOLDWIZARD模塊功能結合產品的特性進行模具結構設計。確定了分型面、澆注系統，推出機構、冷卻系統等，選擇了注射機，計算了成型零部件的尺寸。并根據活塞零件注塑模具的要求對注射機的各參數進行了校核。最后用AutoCAD軟件繪制了一套模具的裝配圖和零件圖。
關鍵詞：注塑模具 機構分析 模具設計
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
