公共汽车横杠扶手支架注射模设计.doc

毕业设计说明书 题 目：公共汽车横杠扶手支架注射模设计 院 （系）： 专 业： 班 级： 学 号： 姓 名： 指导教师： 职 称： 副教授 题目类型：(理论研究 (实验研究 (工程设计 (工程技术研究 (软件开发 电机、电器、仪器仪表、家电和通讯产品制造中具有不可替代的作用Abstract Here to enter the need to turn over a source of plastic materials, low price, quality and performance characteristics. it is in computers and mobile phones, cars and electrical and electronics, instruments, appliance and products manufacturing is an alternative to the role of the most widely used. an injection is a thermoplastic - concrete shape of the main method, the scope of application is very large. In this paper, plastic Hairpin product of the injection mold design to the general design process, During the design process also includes forming necessarily computing components and the calculation of the size of the clamping force injection molding machine, the largest injection volume, injection pressure, the itinerary and mold and mold injection machine parts related to the size of the installation check. At the same time, the product of the process of analysis, the main analysis of the characteristics of the shape of plastic pieces, the size, dimensioning methods, accuracy, surface quality and material properties and other factors, Finally a complete mold assembly drawing general plan and the main non-standard mold parts diagram. Key words: injection；force injection molding machine；injection pressure；assembly drawing 目 录 1 塑件的设计及其材料性能分析 1.1 支架的造型设计 该塑料制件为公共汽车上横杠扶手的支架，其图形如下： 作为公共汽车上的横杠扶手支架，要求其具有一定的强度、韧性，外观表面无缺陷。 1.2 制品的材料及性能分析 由于该支架为汽车零部件，切需要有一定的强度、韧性。故选ABS材料作为该塑件的成型材料。 1.2.1 ABS材料的基本特性 ABS是由丙烯晴、丁二烯、苯乙烯共聚而成的。这三种组分各自的特性，是ABS具有良好的综合性能。丙烯晴使ABS具有良好的耐化学腐蚀及表面硬度。丁二烯使ABS坚韧，苯乙烯使它有良好的加工性和染色性。 ABS无毒、无味、呈微黄色，成型的塑料有良好的光泽。密度为1.02~1.05g/cm3, 有良好的机械强度和一定的耐磨性、耐寒性、耐油性、耐水性、化学稳定性和电气性能， 具有极好的抗冲击强度。ABS有一定的硬度和尺寸稳定性，易于成型加工。 1.