毕业论文：手机上后壳注塑模设计.doc

手机上后壳注塑模设计 [摘要]： 注射成型是热塑性塑料制品生产的一种重要方法。除了个别热塑性塑料外，几乎所有的塑件塑料都是采用此方法成型的。近几年来，注射成型还已成功地用来成型某些热固性塑料制品。 注射成型可以成型各种形状的塑料制品。它的特点是成型周期短，能一次成型外型复杂、尺寸精密、带有嵌件的塑料制品，生产效率高，易于实现自动化生产，所以应用广泛。 注射成型用的设备是各种类型的注射机。注射机的主要作用是将料筒内的塑料加热，使其熔化（塑化），然后对熔融塑料施加高压，使其经喷嘴高速注入模具型腔。 可见，在注射成型的过程中模具起到了关键性作用。它对塑料制品的尺寸、精度和表面粗糙度起着重要的作用。本设计就是以塑料制品的尺寸、公差、结构形状以及塑料的物理性能、力学性能和工艺性能为依据来设计模具的过程。 [关键词]： 注射成型 热塑性 热固性 模具 [Abstract] ： It is a kind of important method that the plastic products of hot plasticity produce to inject shaping. Except the specific hot plasticity plastics, almost all the mould a piece of plastics to adopt this method shaping. In recent years , inject shaping use shaping some hot getting firm plastic products successfully already also. Inject shaping can shape the plastic products of different forms . Characteristic of it shaping cycle short, can one shaping appearance complicated, size accurate having plastic products to inlay one, production efficiency is high , apt to realize production for automation, so use extensivly. Inject equipment that shaping use of different types inject machine. The main function of the injecting machine is to heat the plastics in the material tube, make it melt (plastification), exert the high pressure to the melting plastics , make it injected mould type into by high speed of spray nozzle It is obvious , the mould has played key function during the process of injecting shaping. Its size, precision and roughness of surface to plastic products play an important role. It designs to be with size , public errand , structure form and plastic physics performance , mechanics performance and craft performance of plastic products originally for according to is it design course of mould to come. [Keywords]： injectionshaping thermoplastic resin unthermoplastic resin mould 前言 在现代机械制造业中，模具工业已成为国民经济中一个非常重要的行业，许多新产品的开发和生产，在很大程度上依赖于模具制造技术，特别是在汽车、轻工、电子和航天等行业中尤显重要。模具制造能力的强弱和模具制造水平的高低，已经成为衡量一个国家机械制造技术水平的重要标志之一，直接影响着国民经济中许多部门的发展。　　现代工业的发展，对模具技术的要求越来越高。综