机械5

摘要 当前塑料茶杯注塑成型工艺方法很多，为了进一步提高生产效率，节约生产成本，本文在现有的注塑成型工艺冷却方面做了进一步改进，选择在型芯上开设冷却水道，希望缩短冷却过程，从而提高生产效率。 本文主要介绍了经过优化型芯冷却系统后的塑料茶杯注塑模设计、塑料成形工艺以及注塑的过程，也对注塑机也进行了一些简单的介绍。主要设计过程有：塑料制品的工艺分析，型腔数目的确定，型芯冷却系统的设计，注塑机的选择以及模具的结构设计。本文设计的是一模两腔两板式模具，由于塑料茶杯的特殊形状，无法直接脱模，需设置侧面分型机构，本套模具是通过斜导柱进行侧面分型，本文对模具的各部分零件进行了设计与计算。在完成了一系列计算和构想之后，利用Pro/E5.0画出注件的三维图，并设计好浇注系统、开模方向，然后进行开模仿真，在确定无误之后，利用EMX7.0设计模架，在完成模架设计之后，利用装配方法把整套模具完成整体设计并导出总装配图。 通过采用组合式型芯，并在型芯块上设计螺旋状冷却水道的冷却系统措施后，注塑过程中注件得到了良好的散热，提高了注件生产效率。在现有的工艺上做了改善之后，塑料茶杯的注塑过程大大缩短，既提高了生产效率，同时也节约了生产成本。 关键词：塑料茶杯；冷却系统；注塑机；注塑模；一模两腔 Abstract I
n order to further improve the productio
n efficie
ncy a
nd save the cost of productio
n, i
n order to further improve the productio
n efficie
ncy a
nd save the productio
n cost, this paper has made a further improveme
nt o
n the cooli
ng of the existi
ng i
njectio
n moldi
ng process, a
nd chose to ope
n the cooli
ng cha
n
nel o
n the core, hopi
ng to shorte
n the cooli
ng process, thus raisi
ng the productio
n efficie
ncy. This paper mai
nly i
ntroduces the desig
n of plastic tea cup i
njectio
n mould, plastic formi
ng process a
nd the process of i
njectio
n moldi
ng after the optimized core cooli
ng system, a
nd also i
ntroduces some simple i
ntroductio
n to the i
njectio
n moldi
ng machi
ne. The mai
n desig
n processes are: the process a
nalysis of plastic products, the determi
natio
n of the
number of the cavity, the desig
n of the core cooli
ng system, the selectio
n of the i
njectio
n moldi
ng machi
ne a
nd the structure desig
n of the mould. This desig
n is the first mock exam two cavity two plate mold, due to the special shape plastic cups,
not directly demouldi
ng,
need to set up the side parti
ng mecha
nism, the die is divided by side oblique guide pillar, the mold parts of the desig
n a
nd calculatio
n. After a series of calculatio
ns a
nd ideas have bee
n completed, the 3D drawi
ngs of the i
njectio
n parts are draw
nwith Pro/E5.0, a
nd the casti
ng system a
nd the directio
n of the die are desig
nedwell. The
n the simulatio
n of the die ope
ni
ng is carried out. After the error is determi
ned, the mold frame is desig
nedwith EMX7.0. After the desig
n of the die frame is completed, thewhole set of dies is completed a
nd the overall desig
n is completed a
nd exported to the ge
neral. Assembly drawi
ngs. After the combi
ned core is adopted a
nd the cooli
ng system of the spiral cooli
ngwater cha
n
nel is desig
ned o
n the core block, good heat dissipatio
n is obtai
ned i
n the i
njectio
n process, a
nd the productio
n efficie
ncy of the i
njectio
n parts is improved. After the improveme
nt of the existi
ng tech
nology, the i
njectio
n process of the plastic cup is greatly shorte
ned,which
not o
nly improves the productio
n efficie
ncy, but also saves the productio
n cost. Keywords: plastic cups; cooli
ng system; i
njectio
n moldi
ng machi
ne; i
njectio
n mould; the first mock exam two cavity 目录 摘要I Abstract II 第1章绪论3 1.1模具行业的发展3 1.2注塑工艺概述3 1.2.1注塑工艺发展的现状4 1.2.2注塑工艺发展趋势4 1.3 CAD/CAM/CAE及Pro/E的发展趋势4 1.4注塑模具概述5 1.5课题研究的目的和意义6 第2章模具设计方案7 2.1塑料茶杯二维图7 2.2塑件材料8 2.2.1机械性能9 2.2.2优越的抗水、防潮性9 2.2.3轻质、高硬度10 2.2.4成型性能10 2.3塑料制品的工艺分析10 2.3.1脱模斜度10 2.3.2塑件的壁厚11 2.3.3支承面11 2.3.4材料的成型收缩率11 2.3.5尺寸精度和表面粗糙度12 2.4注塑过程的特点12 2.5型腔数目的确定13 2.6注塑机的选择13 第3章浇注系统的设计17 3.1设计浇注系统基本要点17 3.2主流道设计17 3.2.1主流道的作用17 3.2.2主流道（浇口套）设计基本要点18 3.3分流道设计18 3.3.1分流道的作用18 3.3.2分流道的类型19 3.4浇口设计19 3.4.1浇口的作用19 3.4.2浇口的类型19 3.5冷料穴设计20 3.6排气槽设计21 第4章成型零件的结构设计22 4.1成型零件结构设计22 4.2型芯冷却系统的设计25 4.3模架的选用26 4.3.1安装尺寸校核26 4.3.2开模行程的校核28 4.3.3模架的确定28 4.4导向机构的设计30 4.5脱模机构的设计31 4.5.1顶杆的设计31 4.5.2顶料板的设计32 4.6顶杆的复位32 4.7侧面分型机构设计33 4.7.1概述33 4.7.2斜导柱侧分型机构设计34 总结37 致谢38 参考文献39