机械5

摘要 本次设计的是电风扇罩的注塑模具。所用材料是当前应用较为广泛的材料PP。在设计中，分析塑件的工艺性。模具结构可采用一模一腔，侧浇口进料，注射机采用HTF 80XA型号，并对其相关的数据进行校核。选用铲机、前模滑块抽芯机构。首先根据三维软件设计出分型面，进而设计出型腔、型芯，通过各种手册选择标准模架的绘制，并且进行浇注系统、脱模机构、冷却系统等模具重要结构的设计。最后对设计过程中的相关零部件进行了计算和校核，在无误的基础上进行了模具总装，并利用CAD软件绘制出总装及各主要零件的二维工程图，设计出一套塑料注塑模具 此次设计的过程中查阅了大量的模具设计资料，通过电风扇罩塑料模具的设计与应用，实现了电风扇罩制作工艺上的突破，同原有的设计方法相比，模具的应用不但提高了生产效率而且提升了产品的质量，模具整体设计的思路和要求符合现代设计潮流和未来的发展方向 关键词：电风扇罩；一模一腔；侧浇口；前模滑块；冷却系统；注塑模具 Abstract This desig
n is the i
njectio
n mould of the electric fa
n cover. The material used is PP,which iswidely used at prese
nt. I
n the desig
n, the tech
nological properties of plastic parts are a
nalyzed. Mold structure ca
n be used i
n o
ne mold cavity, side gate feed, i
njectio
n machi
ne adopts HTF 80XA model, a
nd check the releva
nt data. Selectio
n of shovel, fro
nt slider core-pulli
ng mecha
nism. Firstly, accordi
ng to the three-dime
nsio
nal software, the parti
ng surface is desig
ned, a
nd the
n the cavity a
nd core are desig
ned. Throughvarious ma
nuals, the drawi
ng of sta
ndard die base is selected, a
nd the importa
nt structure of the casti
ng system, demouldi
ng mecha
nism a
nd cooli
ng system are desig
ned. Fi
nally, the releva
nt parts i
n the desig
n process are calculated a
nd checked, a
nd the die assembly is carried out o
n the basis of correct
ness. The two-dime
nsio
nal e
ngi
neeri
ng drawi
ngs of the assembly a
nd the mai
n parts are draw
n by CAD software, a
nd a set of plastic i
njectio
n mould is desig
ned. I
n the process of this desig
n,we co
nsulted a large
number of die desig
n data. Through the desig
n a
nd applicatio
n of the plastic die for the fa
n hood,we realized a breakthrough i
n the ma
nufacturi
ng process of the fa
n hood. Comparedwith the origi
nal desig
n method, the applicatio
n of the die
not o
nly improves the productio
n efficie
ncy but also improves the quality of the product. The ideas a
nd requireme
nts of the overall desig
n of the die are i
n li
newith the tre
nd of moder
n desig
n a
nd the future developme
nt. directio
n Keywords: fa
n cover; o
ne mold, o
ne cavity; side gate; fro
nt mold slide; cooli
ng system; i
njectio
n mold. 目录 摘要I Abstract II 1绪论1 1.1前言1 1.2模具发展现状及发展方向1 1.2.1国内外注塑模具的发展现状1 1.2.2国内外注塑模具的发展趋向3 2塑件结构分析4 2.1塑件材料的选择及成型性能分析5 2.2塑件的结构和尺寸精度表面质量分析6 2.2.1塑件的结构设计6 2.2.2塑件尺寸及精度6 2.2.3塑件表面粗糙度6 2.3计算塑件的体积、质量7 3塑件成型方案设计8 3.1分型面选择8 3.2型腔数的确定9 3.3型腔布局9 3.4浇注系统的类型和位置的选择9 3.5成型零件结构设计10 3.5.1型腔设计10 3.5.2型芯设计12 3.6脱模机构的设计14 3.6.1脱模机构的选用原则： 14 3.6.2推板推出机构设计14 3.6.3脱模力的计算15 3.7导向与定位机构设计16 3.8排气及引气系统的设计18 3.9模温调节系统的设计18 3.10侧向抽芯机构类型选择与设计20 3.10.1侧向抽芯机构选择20 3.10.2侧向抽芯机构主要参数的确定20 3.11模架选用22 3.12注塑模具的工作原理23 4模具零件设计25 4.1模具成型零件尺寸计算25 4.2模具强度与刚度校核25 4.3浇注系统的设计26 4.3.1主流道的设计26 4.3.2分主流道的设计27 4.3.3浇口的设计27 4.4模具冷却系统的设计28 5注射机的选用及相关参数的校核29 5.1相关参数29 5.2最大注塑量校核30 5.3锁模力校核31 5.4模具与注塑机安装部分相关尺寸校核31 5.5开模行程校核32 第6章模具材料的选用33 6．1成型零件材料选用33 6．2注射模用钢种33 总结34 致谢35 参考文献36