机械5

摘要 本设计介绍了以丙烯腈-丁二烯-苯乙烯共聚物（ABS）为材料的移动电源后壳注塑模具的设计过程。塑件形状为矩形，内部有加强筋，一边侧壁有孔，其要求它具有耐光，耐化学腐蚀、耐磨。由于塑件侧壁有孔，要求模具必需采用斜导柱侧抽芯机构分型。设计过程中用MoldFlow软件进行模流分析，用Pro/E软件进行三维图的绘制，然后转入Auto CAD绘制完整的模具装配总图和主要的各种模具零部件及编制成型零部件的制造加工工艺。 此模具在设计时，充分考虑了生产批量、以提高生产效率、降低生产成本为主要宗旨。在设计过程中，最主要的是确定型芯和型腔的结构，此外还分析了模具受力，脱模结构的设计、合模导向机构的设计、冷却系统的设计等，重点是一模两腔的注射模具结构、侧向抽芯机构和多杆顶出机构，实现自动复位。在设计时合理选择模具材料，在保证达到强度要求和节省成本的基础上提高生产效率。 关键词：移动电源后壳；塑料注塑模；模流分析；注塑模具结构 Abstract This desig
n i
ntroduces the desig
n process of the i
njectio
n mold for the back shell of the mobile power supply with acrylo
nitrile butadie
ne styre
ne copolymer (ABS) as the material. It is recta
ngular i
n shape, with stiffe
ners i
nside, a
nd o
ne side wall has holes. It requires light resista
nce, chemical corrosio
n resista
nce a
nd wear resista
nce. Because the side wall of the plastic part has holes, it is
necessary to use the i
ncli
ned guide pillar side core pulli
ng mecha
nism to divide the mould.I
n the desig
n process, MoldFlow software is used to a
nalyze the model flow, a
nd the Pro/E software is used to draw the three-dime
nsio
nal map. The
n, it is tra
nsferred i
nto the Auto CAD to draw the complete assembly drawi
ng of the die assembly a
nd the mai
n parts of the mould a
nd the ma
nufacturi
ng process of the formi
ng parts. Whe
n desig
ni
ng the mould, the productio
n volume is fully take
n i
nto accou
nt, a
nd the mai
n purpose is to i
ncrease productio
n efficie
ncy a
nd reduce productio
n cost.I
n the desig
n process, the most importa
nt is to determi
ne the core a
nd cavity structure, i
n additio
n to the die stress a
nalysis, mould desig
n, mold orie
nted orga
nizatio
n desig
n, cooli
ng system desig
n, the key is the first mock exam two cavity i
njectio
n mold structure, the side core pulli
ng mecha
nism a
nd multi rod automatic reset mecha
nism. I
n the desig
n, reaso
nable selectio
n of mold materials, to e
nsure that the stre
ngth requireme
nts a
nd cost savi
ngs o
n the basis of improvi
ng productio
n efficie
ncy. Keywords:Mobile power rear shell; Plastic i
njectio
n mold; Bold flow a
nalysis; I
njectio
n mold structure 目录 摘要I Abstract II 1绪论1 1.1注塑模具基本概念1 1.2注塑成型原理1 1.3注塑模具的现状2 1.4注塑模具的发展趋势3 1.5选题的依据和方向3 2塑件的工艺性分析5 2.1塑件的原材料分析5 2.2塑件的结构、尺寸精度和表面质量分析7 2.3计算塑件的体积和质量8 2.4注塑机的概述8 2.5注塑机的选择9 2.6本章小结10 3 MOLDFLOW模流分析11 3.1浇口位置分析11 3.2成型窗口分析12 3.3充填过程模拟分析13 3.4流动分析17 3.5冷却分析19 3.6翘曲分析21 3.7本章小结24 4注射模的结构设计25 4.1分型面选择25 4.2确定型腔的排列方式26 4.3浇注系统的设计26 4.4侧向抽芯机构的设计32 4.5合模导向机构的设计37 4.6脱模顶出机构的设计39 4.7本章小结40 5模具设计的有关计算41 5.1成型零件工作尺寸的计算41 5.2型腔侧壁厚度和底板厚度的计算45 5.3模具加热和冷却系统的计算47 5.4排气系统设计48 5.5模具闭合高度的确定49 5.6本章小结49 6注塑机参数的校核50 6.1最大注塑量的校核50 6.2注塑压力校核50 6.3锁模力的校核51 6.4模具闭合高度的校核51 6.5开模行程的校核52 7绘制模具总装图53 8总结56 8.1经济性分析56 8.2设计总结59 参考文献64 致谢65