机械5

基于MOLDFLOW的红英扇外壳模具设计 摘要 伴随着机械制造工业的发展，模具是工业之母的地位依然不可撼动，模具能够实现高效率状态下，同等精度和质量制品的的大批量生产。模具工业技术在不断的发展前行中得到了更加广泛的应用。特别是在电子电器设备与机械仪表设备、生活日用塑胶件中有了更高程度的提高。 本次设计是以“红英扇外壳”塑件为原始文件，进行注塑模具设计。首选针对此塑件，进行结构分析，确定其塑件结构适合采用注塑模具结构生产，然后选择合适的高分子材料与型腔的出模数量。结合模具设计原则与设计规范，选择分型面并且分模完成成型系统零件设计，对浇注系统的设计方面，力求充填均匀，流道废料少、短。冷却系统均匀的分布在塑件的周边，使得温度冷却合理，在脱模顶出机构上，采用均匀分布顶出系统，让塑件能够均匀的受力顶出脱模。在选择标注模架系统方面，采用了国内最大的模具企业生产的龙记GB国标标准模架系统，能够保证制造周期短，制造精度高、效率高的特点。 在完成全套的模具结构设计之后，对其生产所需的注塑机进行了选择与校核，其中校核项目包裹注塑量、注塑压力、锁模力、安装尺寸、顶出行程等内容。 本次设计中，采用了计算机辅助设计软件，其中包括二维设计软件AutoCAD绘制模具的总装图与非标的零件工程图，采用了三维软件进行了塑件的建模与整体装配建模。 本次设计来源于生活实践中，应用非常广泛，采用计算机辅助设计软件大大的提高了设计效率。通过完成了对应设计参数的计算与校核。经过计算校核，本套设计满足实践需求。 关键词：注塑模具；结构设计；注塑机；校核；机械设计 Abstract With the developme
nt of machi
nery ma
nufacturi
ng i
ndustry, mold is the mother of i
ndustry's positio
n is still u
nshakable, mold ca
n achieve high efficie
ncy, the same precisio
n a
nd quality of the mass productio
n of products. Die i
ndustry tech
nology i
n the co
nti
nuous developme
nt of forward has bee
n morewidely used. Especially i
n electrical a
nd electro
nic equipme
nt a
nd mecha
nical i
nstrume
ntatio
n equipme
nt, daily life of plastic parts i
n a higher degree of improveme
nt. This desig
n is based o
n the"ho
ngyi
ng fa
n shell" plastic parts as the origi
nal docume
nt, the i
njectio
n mold desig
n. The first choice for the plastic parts, structural a
nalysis, determi
ne the plastic parts structure is suitable for the i
njectio
n mold structure productio
n, a
nd the
n choose the appropriate polymer materials a
nd cavity of the
number of mold. Combi
nedwith the desig
n pri
nciples a
nd desig
n specificatio
ns of the mold, the parti
ng surface is selected a
nd the parts of the formi
ng system are desig
ned by parti
ng the mold. I
n terms of the desig
n of the casti
ng system, the compa
ny strives to achieve u
niform filli
ng, lesswaste a
nd shorter flow passage. The cooli
ng system is eve
nly distributed arou
nd the plastic parts,which makes the cooli
ng temperature reaso
nable. O
n the ejectio
n mecha
nism of ejectio
n mold, the eve
nly distributed ejectio
n system is adopted to e
nable the plastic parts to ejectio
n a
nd ejectio
nwith u
niform force. I
n the aspect of selecti
ng marki
ng die support system, lo
ngji GB GB sta
ndard die support system produced by the largest die compa
ny i
n Chi
na is adopted to e
nsure short ma
nufacturi
ng cycle, high ma
nufacturi
ng accuracy a
nd high efficie
ncy. After the completio
n of a full set of mold structure desig
n, the i
njectio
n moldi
ng machi
ne required for its productio
nwas selected a
nd checked, i
ncludi
ng checki
ng the co
nte
nts of package i
njectio
nvolume, i
njectio
n pressure, clampi
ng force, i
nstallatio
n size, ejectio
n stroke a
nd so o
n. I
n this desig
n, computer aided desig
n software is adopted, i
ncludi
ng 2d desig
n software AutoCAD to draw the ge
neral assembly drawi
ng of the mold a
nd
no
n-sta
ndard parts e
ngi
neeri
ng drawi
ng, a
nd 3d software is adopted to co
nduct modeli
ng of plastic parts a
nd overall assembly modeli
ng. This desig
n comes from the life practice, the applicatio
n isverywidespread, the use of computer aided desig
n software greatly improved the desig
n efficie
ncy. The correspo
ndi
ng desig
n parameters are calculated a
nd checked. After calculatio
n a
ndverificatio
n, this set of desig
n meets the practical
needs. Keywords: i
njectio
n mold; Structural desig
n; I
njectio
n moldi
ng machi
ne; Check; Mecha
nical desig
n 目录 摘要I Abstract II 1绪论1 1.1注塑模具的简介1 1.2注塑模具发展国内外现状1 1.3国内模具的优劣势2 1.4本课题研究内容2 2塑件工艺分析与材料的选择3 2.1塑件工艺分析3 2.2塑件材料的选择3 2.2.1 ABS塑料的特点3 2.2.2 ABS的技术指标3 2.2.3 ABS的注塑成型工艺参数4 2.3 ABS材料的应用4 2.4塑件的体积与质量4 2.5塑件壁厚的分析5 3模具结构方案的确定6 3.1出模数量与型腔布局6 3.2分型面的设计6 3.2.1分型面设计的原则6 3.2.2分型面类型的选择7 3.3分型面具体结构形式的确定7 4模具浇注系统的设计8 4.1浇注系统的组成8 4.2浇注系统的设计原则8 4.3流道的设计8 4.3.1主流道的设计8 4.3.2分流道的设计9 4.3.3冷料穴的设计9 4.3.4浇口的设计9 4.4浇注系统标准件的选用10 5模具成型系统设计11 5.1型腔结构设计11 5.2型芯结构设计11 5.3型腔成型零件尺寸计算12 5.4型芯成型零件尺寸计算13 5.5成型钢材的选用13 6模具温度系统设计15 6.1模具温度调节系统概述15 6.2模具冷却系统设计要求15 6.3冷却水道的形式类型16 6.4模具冷却水道的计算校核16 7模具顶出脱模机构18 7.1顶出脱模机构概述18 7.2顶出机构零件18 7.3顶出脱模机构的分类18 7.4脱模机构的设计要点18 8标准模架的选用20 8.1模架概述20 8.2标准模架的选用20 8.3模架型号的确定20 9注塑机的选择与校核22 9.1注塑机的概述22 9.2初选注塑机型号22 9.3校核注塑机注塑量23 9.4校核压力23 9.5校核模具安装尺寸23 9.6校核移模行程23 9.7校核注塑机锁模力24 第10章Moldflow的注塑模拟成型分析25 10.1成型模拟简述25 10.2成型过程分析26 10.3充填时间分析29 10.4流动前沿温度分析29 10.5顶出时体积收缩率30 10.6锁模力的分析31 10.7冻结层因子分析32 10.8熔接痕分析33 10.9变形量分析34 10.10温度、零件35 11设计总结37 参考文献38 致谢40 附图41