机械5

瓶盖注塑模具设计 摘要 本设计题目为瓶盖注塑模设计，体现了内螺纹塑料零件的设计要求、内容及方向，有一定的设计意义。通过对该零件模具的设计，进一步加强了设计者注塑模设计的基础知识，为设计更复杂的注塑模具做好了铺垫和吸取了更深刻的经验。 本设计运用塑料成型工艺及模具设计的基础知识，首先分析了塑件的成分及性能要求，为选取浇口的类型做好了准备；然后估算了塑件的体积，便于选取注塑机及确定型腔数量；最后分析了塑件的特征，确定模具的设计参数、设计要点及推出装置的选龋 本塑件内螺纹与开模方向垂直，所以在脱模时必须考虑设计一个能在开模时随着开模过程的进行使塑件和型腔脱离。本副模具的设计中，采用了斜滑块侧抽芯机构,在开模时,动模后退,斜滑块沿主型芯斜面滑动,在滑动的过程中,在推杆的作用下,塑件脱离型芯,直到塑件脱出型腔。这种机构脱模可靠，设计方便且在模具中占用空间较小，非常适合在本副模具中使用。 关键词：注塑模浇口内螺纹斜滑块 Abstract The requireme
nt，co
nte
nt a
nd directio
n of the desig
n of the i
nter
nal screwthread plastic parts are embodied o
n this i
njectio
n mould desig
n of the plastic parts of lo
ng pipe box.The desig
ner’s fou
ndatio
n k
nowledge of the i
njectio
n mould desig
n is rei
nforced a
nd is able to desig
n more complexi
njectio
n mould through the desig
n. Through the fou
ndatio
n k
nowledge,firstly,the compositio
n a
nd the performa
nce of the part are a
nalyzed to choose the type of the gat.Seco
ndly,thevolume of the part is estimated to choose the i
njectio
n moldi
ng machi
ne a
nd to determi
ne the mould qua
ntityco
nve
nie
ntly.Lastlythe character of the part is a
nalyzed to determi
ne the mould desig
n parameter a
nd desig
n poi
nt a
nd choose the ejectio
n assembly. The part’s i
nter
nal screwthread is perpe
ndicular to the ope
n directio
n of the mould.Sowe must device a segregate u
nit that makes the part a
nd the mould to segregate simulta
neouslywhe
n the mould is ope
ned.I
n this mould desig
n,side loose core gear is usedwith taper slide.Whe
n the mould ope
n,the motor module back away,the taper slide slumps alo
ng the mai
n core,at the same time,the part is pushed off byejector pi
ns from the mould upward.The core makes ejectio
n crediblya
nd the desig
n co
nve
nie
ntlya
nd occupies little room.So,it is adapted to be used o
n this mould extraordi
narily. Keywords: I
njectio
n mould,gate,i
nter
nal screwthread,taper slide 目录 第一章绪论.....................................................................................................................1 1.塑料模具设计与制造在国民经济中的地位和作用...........................................1 2.塑料成型技术的发展趋势.................................................................................2 3.塑料模分类...............................................................................................................2 第二章模塑工艺规程的编制.........................................................................3 2.1塑件的工艺性分析.............................................................................4 2.1.1塑件的原材料分析.............................................................................4 2.1.2塑件的结构和尺寸精度及表面质量分析..............................................4 2.2计算塑件的体积和质量.............................................................................5 2.3塑件注塑工艺参数的确定................................................................................5 第三章注塑模的结构设计................................................................................6 3.1分型面选择...............................................................................................6 3.2确定型腔的排列方式...................................................................................7 3.3浇注系统设计..............................................................................................7 3.3.1主流道设计..............................................................................................7 3.3.2主流道衬套的设计.......................................................................................8 3.3.3浇口设计......................................................................................................9 3.3.4排气系统的设计.....................................................................................9 3.4抽芯机构设计.............................................................................................10 3.4.1确定斜滑块倾角................................................................................10 3.4.2确定斜滑块的尺寸................................................................................10 3.4.3滑块与导滑槽设计............................................................................11 3.5成型零件结构设计................................................................................12 3.5.1的结构设...........................................................................12 3.5.2凸模的结构设计................................................................................12 3.6导向机构的设计...................................................................................13 第四章模具设计的有关计算........................................................................14 第五章模具加热有冷却系统的设计................................................................16 5.1求塑件在硬化时每小时释放的热量........................................................16 5.2求冷却水的体积流量V..........................................................................16 第六章闭合高度的确定....................................................................................16 第七章注塑机有关参数的校核......................................................................17 第八章绘制模具总装图和非标准零件的工作图.......................................17 第九章注塑模主要零件加工工艺规程的.................................................18 9.1.凹模的结构设计.......................................................................................18 9.1.1凹模的结构形式....................................................................................18 9.1.2凹模的技术要求.......................................................................................18 9.2.凸模的结构设计.....................................................................................19 9.2.1凸模的结构形式.....................................................................................19 9.2.2技术要求.....................................................................................................19 9.3.成型零件加工的加工过程的工序安排....................................................20 9.4.成型零件的一般常用加工工序..................................................................20 9.4.1定模板....................................................................................................20 9.4.2动模板...................................................................................................20 第十章注塑模具的调试................................................................................20 10.1模具的安装................................................................................................20 10.2模具的调试..................................................................................................21 10.3.试模后模具验收项目..........................................................................25 10.3.1【塑件质量】................................................................................25 10.3.2【模具性能】................................................................................26 设计总结...............................................................................................................27 致谢...........................................................................................................................28 参考文献...............................................................................................................29