1、 i 摘要 注塑成型是生产塑料制品的最常用的方法之一 。 塑料工业是当今世界上增长最快的工业门类之一，而注塑模具是其中发展较快的种类。 注射成型是塑料成型的一种重要方法，它主要适用于热塑性塑料的成型，可以一次成型形状复杂的精密塑件。 近年来， CAD技术的应用越来越普遍和深入，大大缩短了模具设计周期，提高了制模质量和复杂模具的制造能力。 本课题就是将 玩具小车底板 作为设计模型，将注射模具的相关知识作为依据，阐述塑料注射模具的设计过程。 本设计对玩具小车底板进行注塑设计 ，利用了 pro/E 软件 对塑件进行 3D 造型，对塑件结构进行工艺分析，确定采用一模两腔、侧浇口进料的三板式模具。在设计
2、中确定了注射机的机型，接着对各个部分进行了计算并校核，确定了浇注系统 、 抽芯系统 、冷却系统。最后运用 autoCAD 绘制了模具装配图和零件图。 关键词 ：塑料模具；注射成型；模具设计； ii ABSTRACT Injection molding is the production of plastic products, one of the most common methods. Plastics industry is the worlds one of the fastest growing industrial sectors, while the injection mold
3、 is one of the fast-growing species. Injection molding is an important method of plastic molding, which is mainly applied to thermoplastic molding, forming a complex shape can be precision plastic parts. In recent years, CAD technology more widely and deeply, greatly reducing the mold design cycle a
4、nd improve the quality and complexity of the molding mold manufacturing capabilities. The issue is the toy car chassis as a design model, the injection mold-related knowledge as the basis to explain the plastic injection mold design process. The design of the toy car plastic base plate design, the u
5、se of the pro / E software for 3D modeling for plastic parts, plastic parts structure for process analysis, determine the use of a two cavity mold, side gate feed the three-plate mold. Determined in the design of injection machine models, then the individual sections were calculated and checked to determine the gating system, pumping core systems, cooling systems. Finally, we use AutoCAD drawing of the mold assembly drawing and parts diagram. Keywords: plastic mold； injection molding； mold design；
