机械5

摘要 模具经过几十年的发展整体都得到了很大的提升，作为工业的基石有着十分重要的地位和作用，模具也分作很多个种类，其中注塑模具在模具中的应用最为广泛，我们生活中的大多数东西都是通过注塑模具来完成生产的，本次设计就是将粘毛器作为核心进行注塑模具设计。 首先要分析塑件的结构及工艺性能，考虑塑件在实际生活中的应用，选择合适的材料。塑件分型面的选择也是非常关键的一部分，根据注塑模设计原则确定分型面的位置，通常情况下分型面选用塑件较大的平面。然后是对出模数量的分析，根据塑件的结构特点和实际生产确定出模的数量。完成好型腔布局后考虑浇注系统的形式和位置，浇注系统的设计主要针对主流道，分流道和浇口进行设计，既要保证充填均匀又要减少废料。对于成型部件的设计采用了嵌入式的型芯、型腔，成型零部件因为是与塑件直接接触的所以精度要求更高，对整零件的尺寸进行计算校核。模具注塑完成后用冷却系统对模具进行降温，帮助塑件冷却成型。顶出系统最常用的是顶针顶出，设计更简单加工方便。最后根据设计的参数选择合适的模架。通常模架选用标准模架，能够节省制造成本同时可靠性稳定性更好。 结合完成后的设计数据，选择三维软件进行建模，CAD绘制出二维图纸。最后编写出说明书并选择合适的注塑机进行计算校核。 关键词：材料;浇口;成型零件;校核 Abstract After decades of developme
nt,thewhole mold has bee
n greatlyimproved.As the cor
nersto
ne of the i
ndustry,the mold has averyimporta
nt positio
n a
nd role.There are ma
nyki
nds of mold.Amo
ng them,the i
njectio
n mold is the mostwidelyused i
n the mold.Most of the thi
ngs i
n our life are produced through i
njectio
n mold.This desig
n is to use the hair gluer as the core for i
njectio
n mold Desig
n. First of all,the structure a
nd process performa
nce of plastic parts should be a
nalyzed,a
nd the applicatio
n of plastic parts i
n real life should be co
nsidered to select appropriate materials.The selectio
n of parti
ng surface of plastic part is also averyimporta
nt part.Accordi
ng to the desig
n pri
nciple of i
njectio
n mold,the locatio
n of parti
ng surface is determi
ned.Ge
nerally,the larger pla
ne of plastic part is selected as parti
ng surface.The
n it a
nalyzes the
number of molds,a
nd determi
nes the
number of molds accordi
ng to the structural characteristics of the plastic parts a
nd the actual productio
n.After the cavitylayout is completed,the form a
nd positio
n of the pouri
ng system are co
nsidered.The desig
n of the pouri
ng system is mai
nlyaimed at the mai
n flowcha
n
nel,the shu
nt cha
n
nel a
nd the gate,which
not o
nlye
nsures the filli
ng u
niformitybut also reduces thewaste.For the desig
n of formi
ng parts,embedded core a
nd cavityare used.Because the formi
ng parts are i
n direct co
ntactwith the plastic parts,the accuracyrequireme
nts are higher.The size of thewhole part is calculated a
nd checked.After i
njectio
n moldi
ng,cooli
ng system is used to cool the mold to help the plastic parts cool dow
n.Ejector system is the most commo
nlyused ejector pi
n,the desig
n is more simple a
nd co
nve
nie
nt processi
ng.Fi
nally,accordi
ng to the desig
n parameters,choose the appropriate mold base.Ge
nerally,the sta
ndard mold base is selected,which ca
n save ma
nufacturi
ng cost a
nd improve reliabilitya
nd stability. Combi
nedwith the fi
nished desig
n data,three-dime
nsio
nal software is selected for modeli
ng,a
nd two-dime
nsio
nal drawi
ngs are draw
n byCAD.Fi
nally,the i
nstructio
n book is compiled a
nd the appropriate i
njectio
n moldi
ng machi
ne is selected for calculatio
n a
ndverificatio
n. Keywords: material; gate; formi
ng parts; check 目录 摘要I Abstract II 目录III 第一章绪论1 1.1注塑模具简介1 1.2注塑模具发展国内外现状2 1.3国内模具的优劣势3 第二章塑件结构与注塑工艺分析4 2.1塑件的结构分析4 2.2塑件材料的选用及性能分析4 2.2.1ABS的特点4 2.2.2ABS成型性能5 2.2.3ABS的技术指标5 2.3塑件体积与质量5 第三章模具结构设计与注塑机的选择7 3.1分型面的设计7 3.1.1分型面选用原则7 3.2.2分型面的确定7 3.2模具型腔布局8 3.3注塑机的选择8 3.4排气机构的设计10 第四章浇注系统的设计11 4.1主流道的设计11 4.2分流道的设计11 4.3浇口的设计12 第五章成型零件的计算13 5.1型腔的结构设计13 （1）型腔径向尺寸的计算采用平均尺寸法，公式如下：13 （2）型腔深度尺寸计算14 5.2型芯结构设计14 5.3成型零件强度校核16 第六章冷却系统的设计17 6.1冷却系统的概述17 6.2冷却系统的计算17 1).求塑料制品在固化时每小时释放的热量Q 18 2).水的体积流量18 3).求冷却水道直径d 18 第七章顶出与复位机构的设计19 7.1顶出系统的设计19 7.1.1塑件脱模力的计算19 7.1.2推杆强度校核19 7.2复位机构的设计20 第八章标准模架的选择21 8.1标准模架尺寸计算21 第九章模具尺寸与注塑机校核23 9.1注塑机锁模力的校核23 9.2校核压力23 9.3校核模具安装尺寸23 9.4校核移模行程23 9.5校核注塑机锁模力24 总结25 致谢26 参考文献27