塑料件模具设计.doc

摘 要
本课题主要是针对小型电风扇挡尘板的模具设计,通过对塑件进行工艺的分析和比较,最终设计出一副注塑模。该课题从产品结构工艺性,具体模具结构出发,对模具的浇注系统、模具成型部分的结构、顶出系统、冷却系统、注塑机的选择及有关参数的校核、都有详细的设计,同时并简单的编制了模具的加工工艺。通过整个设计过程表明该模具能够达到此塑件所要求的加工工艺。根据题目设计的主要任务是小型电风扇挡尘板注塑模具的设计。也就是设计一副注塑模具来生产小型电风扇挡尘板塑件产品,以实现自动化提高产量。针对小型电风扇挡尘板的具体结构,该模具是侧浇口的注射模具。为了方便脱模,采用了四根顶杆均匀的分布在塑件能承受较大推力的地方,方便了脱模,也简化了模具机构,降低了成本。
关键字:塑料模具 小型电风扇挡尘板 推杆 侧浇口
目 录
前言··················································1
塑料件的三维零件图····································2
第一章 塑件工艺分析··································3
1、塑件分析················································3
2、电风扇挡尘板的物料性能、成型性能与零件结构··············3
第二章 注塑设备选择··································4
1、测量塑件的体积··········································4
2、计算出塑件的质量········································4
3、选定注射机··············································4
4、XS-Z-30型注射机的参数···································5
第三章 分型面位置的确定·······························5
1、分型面选择原则···········································5
2、零件图析确定分型面·······································6
第四章 浇注系统形式和浇口的设计·······················6
1、浇注系统设计原则·········································6
2、主流道衬套设计···········································6
3、分流道设计···············································7
4、浇口的设计···············································9
第五章 成型零件的设计与加工工艺·······················10
1、定模板的设计·············································11
2、动模板的设计·············································12
3、型芯的设计···············································12
4、模架的设计···············································13
第六章 合模导向机构设计·······························14
1、导向与定位机构设计·······································14
第七章 脱模机构设计···································15
1、脱模机构设计·············································15
第八章 注塑机参数校核·································17
1、最大注塑量校核···········································17
2、注射压力校核·············································18
3、锁模力校核···············································19
4、模具与注射机安装相关部分尺寸校核·························19
第九章 排气、冷却系统的设计与计算·····················20
1、排气系统的设计与计算·····································20
2、冷却系统的设计与计算·····································21
第十章 模具的装配·····································23
1、模具的装配程序···········································23
设计总结···············································24
结束语·················································25
参考文献···············································26
前言
随着中国当前的经济形势的日趋好转,在“实现中华民族的伟大复兴”口号的倡引下,中国的制造业也日趋蓬勃发展;而模具技术已成为衡量一个国家制造业水平的重要标志之一,模具工业能促进工业产品生产的发展和质量提高,并能获得极大的经济效益,因而引起了各国的高度重视和赞赏。在日本,模具被誉为“进入富裕的原动力”,德国则冠之为“金属加工业的帝王”,在罗马尼亚则更为直接:“模具就是黄金”。可见模具工业在国民经济中重要地位。我国对模具工业的发展也十分重视,早在1989年3月颁布的《关于当前国家产业政策要点的决定》中,就把模具技术的发展作为机械行业的首要任务。
? 近年来,塑料模具的产量和水平发展十分迅速,高效率、自动化、大型、长寿命、精密模具在模具产量中所战比例越来越大。注塑成型模具就是将塑料先加在注塑机的加热料筒内,塑料受热熔化后,在注塑机的螺杆或活塞的推动下,经过喷嘴和模具的浇注系统进入模具型腔内,塑料在其中固化成型。
? 本次毕业设计的主要任务是小型电风扇挡尘板注塑模具的设计。也就是设计一副注塑模具来生产小型电风扇挡尘板塑件产品,以实现自动化提高产量。针对小型电风扇挡尘板的具体结构,通过此次设计,使我对侧浇口模具的设计有了较深的认识。同时,在设计过程中,通过查阅大量资料、手册、标准、期刊等,结合教材上的知识也对注塑模具的组成结构(成型零部件、浇注系统、导向部分、推出机构、排气系统、模温调节系统)有了系统的认识,拓宽了视野,丰富了知识,为将来独立完成模具设计积累了一定的经验。
设计者:江源
二〇一〇年十一月
塑料件的三维零件图
第一章:塑件工艺分析
1、塑件分析
小型电风扇挡尘板为塑料小件,需要大批量生产,则选用一模两件,其材质必须有良好的绝缘性,相对强度要求不高,从经济环保角度考虑选择聚丙烯(PP)塑料。?
小型电风扇挡尘板尺寸见图1-2-1,整体尺寸是Ф80的圆形壳盖,高