机械5

本文主要介绍的是内凸锥形罩塑模具的设计方法。首先分析了内凸锥形罩制件的工艺特点，包括材料性能、成型特性与条件、结构工艺性等，并选择了成型设备。接着介绍了内凸锥形罩塑模的分型面的选择、型腔数目的确定及布置，重点介绍了浇注系统、成型零件、合模导向机构、脱模机构、定距分型机构以及冷却系统的设计。然后选择标准模架和模具材料，并对注射机的工艺参数进行相关校核。最后对模具的工作原理进行阐述，以及在安装调试过程中可能出现的问题进行总结、分析，并给出了相应的解决方法。 本文论述的内凸锥形罩塑模具采用两板式结构，即浇注系统凝料和制件在不同的分型面脱出，采用一模两腔的型腔布置，最后利用推杆将制件推出。 关键词：内凸锥形罩；注塑模；两板模；浇注系统；脱模机构； Abstract The desig
ni
ng methods of i
njectio
n mould of the charger shell are mai
nly i
ntroduced i
n this paper. First, the tech
nological characteristics are a
nalysed, i
ncludi
ng material properties, formi
ng characteristics a
nd co
nditio
ns, the process of the structure, the formi
ng equipme
nt is selected.The
n the parti
ng li
ne is selected, the
number of cavities is determi
ned.The specific i
ntroductio
n are made o
n gati
ng system, cooli
ng system,Moldi
ng parts, Steeri
ng mecha
nism, mouldi
ng mecha
nism, a
nd spacer parti
ng i
nstitutio
ns.The
n the sta
ndard mould bases a
nd Mould materials are selected.a
nd the tech
nological parameters of the formi
ng equipme
nt is checked. Fi
nally, problems that may emerge duri
ng the mold i
nstallatio
n process are a
nalysed a
nd the appropriate solutio
ns are provided. Threepe
nce mould is used o
n the desig
n of charger shell,that is pouri
ng material a
nd the plastic parts are ejected from differe
nt parti
ng li
nes. there are four cavities i
n this mould,fi
nally a stripper plate is used to push off the charger shells. Keyword:Charger shell;I
njectio
n mould;Two spe
nce mould;Gati
ng system;Mouldi
ng mecha
nism ; Space parti
ng i
nstitutio
ns 目录 摘要1 Abstract 2 绪论4 1.模塑工艺规程的编制6 1.1塑件的工艺性分析7 1.1.1塑件的原材料分析7 1.1.2塑件的结构和尺寸精度及表面质量分析8 1.2计算塑件的体积和质量9 1.3塑件注塑工艺参数的确定9 1.4塑料成型设备的选取10 2.注塑模的结构设计11 2.1分型面选择11 2.2确定型腔的数目及排列方式13 2.2.1模腔数量的确定13 2.2.2型腔的排列方式14 2.3浇注系统设计14 2.3.1主流道设计14 2.3.2分流道设计15 2.3.3浇口设计16 2.3.4排气结构的设计17 2.3.5主流道衬套的选取17 2.4抽芯机构设计18 2.4.1确定抽芯距18 2.4.2确定斜销的倾角18 2.5推出机构设计19 2.6成型零件结构设计19 2.6.1定模板与动模板的设计19 3.内凸锥形罩塑模具的有关计算21 4.模具加热和冷却系统的设计22 5.注塑机有关参数的校核23 5.1模具合模时校核23 5.2模具开模时校核24 6.绘制模具总装图和非标零件工作图24 6.1本模具总装图和非标零件工作图见附图24 6.2本模具的工作原理24 结论25 致谢26 参考文献27