机械5

摘要 本次设计是以“手机外壳”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。主流道采用热嘴，在热流道模具成型过程中，熔体温度在流道系统内得到准确控制，熔体以均匀的状态流入各模腔，从而可以得到高品质的零件。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，其中校核项目锁模力、开模行程等内容。 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：手机外壳；注塑模具；型腔；分型面；热流道 Abstract This desig
n is based o
n the"mobile pho
ne shell" plastic parts as the origi
nal docume
nt, the i
njectio
n mold desig
n. The preferred method is to a
nalyze the structure of the plastic part a
nd determi
ne that the structure of the plastic part is suitable for the productio
n of i
njectio
n mold structure. The
n the appropriate amou
nt of polymer material a
nd cavity is selected. Accordi
ng to the desig
n pri
nciples a
nd specificatio
ns of the mould, the parti
ng surface is selected a
nd the part desig
n of the formi
ng system is completed by parti
ng. For the desig
n of the gati
ng system, the filli
ng is u
niform a
nd the ru
n
nerwaste is less a
nd shorter. The hot
nozzle is used i
n the mai
n cha
n
nel. Duri
ng the formi
ng process of the hot ru
n
ner die, the melt temperature is accurately co
ntrolled i
n the ru
n
ner system, a
nd the melt flows i
nto each cavity i
n a u
niform state, thus high quality parts ca
n be obtai
ned. I
n the ejectio
n mecha
nism, the ejectio
n systemwith u
niform distributio
n is used to eject the plastic parts u
nder u
niform force. I
n the selectio
n of marki
ng die base system, Lo
ngji GB
natio
nal sta
ndard die base system produced by the largest domestic die a
nd mould e
nterprises is adopted,which ca
n e
nsure the characteristics of short ma
nufacturi
ng cycle, high ma
nufacturi
ng accuracy a
nd high efficie
ncy. After the complete set of die structure desig
nwas completed, the i
njectio
n mouldi
ng machi
ne
needed for its productio
nwas selected a
nd checked, i
ncludi
ng checki
ng the clampi
ng force a
nd ope
ni
ng stroke of the project. I
n this desig
n, computer aided desig
n software is used, i
ncludi
ng two-dime
nsio
nal desig
n software AutoCAD to draw the assembly drawi
ng a
nd
no
n-sta
ndard parts e
ngi
neeri
ng drawi
ng of the die, a
nd three-dime
nsio
nal software is used to model the plastic parts a
nd thewhole assembly modeli
ng. This desig
n comes from life practice a
nd iswidely used. The efficie
ncy of desig
n is greatly improved by usi
ng computer aided desig
n software. The correspo
ndi
ng desig
n parameters are calculated a
nd checked. After calculatio
n a
ndverificatio
n, the desig
n meets the practical
needs. Keywords: mobile pho
ne shell; i
njectio
n mould; cavity; parti
ng surface; hot ru
n
ner 目录 摘要I Abstract II 第1章引言1 1.1热流道技术概述1 1.1.1热流道技术的优势2 1.1.2热流道技术的不足2 1.2热流道技术的发展趋势2 第2章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4 2.2.1 ABS塑料的特点4 2.2.2 ABS的技术指标4 2.2.3 ABS的注塑成型工艺参数5 2.3 ABS材料的应用5 2.4塑件的成型方法6 2.5塑件的体积与质量6 2.6塑件壁厚的分析6 第3章模具结构方案的确定7 3.1出模数量与型腔布局7 3.2分型面的设计8 3.2.1分型面设计的原则8 3.2.2分型面类型的选择8 3.3分型面具体结构形式的确定9 第4章模具浇注系统的设计10 4.1浇注系统的设计原则10 4.2热流道的设计10 4.3浇注系统标准件的选用12 4.4浇口的设计12 4.5分流道的设计12 第5章模具成型系统设计14 5.1型腔结构设计14 5.2型芯结构设计15 5.3型腔成型零件尺寸计算17 5.4型芯成型零件尺寸计算17 5.5成型钢材的选用18 第6章标准模架的选用20 6.1模架概述20 6.2标准模架的选用20 6.3选标准模架20 6.4定模板与动模板的设计20 第7章注塑机的选择与校核22 7.1校核注塑机注塑量22 7.2校核压力22 7.3校核注塑机锁模力22 7.4开模行程的校核23 7.5初选注塑机型号23 第8章模具顶出脱模机构25 8.1顶出脱模机构概述25 8.2脱模机构的设计要点25 第9章合模导向机构的设计28 第10章侧向分型与抽芯机构设计29 10.1计算斜导柱倾斜角30 10.2计算斜导柱直径30 10.3计算斜导柱长度30 第11章温度调节系统设计31 第12章注塑模具工作原理32 设计总结33 致谢34