机械5

摘要 本次设计要注意塑件的设计要求，采用的材料和特性，注射的条件，塑件的尺寸精度、表面质量及几何形状，要明确塑件的生产批量及体积质量，该产品采用牛角型潜伏式浇口。从模具的角度考虑，要想降低成本，一定要注意注射机的选择及安装，需设计脱模机构。因此可设计成多腔模形式以提高生产率。所以本产品采用了一模出两件的形式进行成型加工，大大提高了生产效率。 还要了解注射机的形式和模具的关系，总体知道模具结构的设计，如何运用浇注系统、推出机构、温度调节系统和排气系统，最后完成相关的注塑模具设计计算。 关键词：潜伏式浇口，注射机，脱模机构，浇注系统，推出机构，注塑模具 Abstract I
n this desig
n, atte
ntio
n should be paid to the desig
n requireme
nts of the plastic parts, the materials a
nd characteristics used, the i
njectio
n co
nditio
ns, the dime
nsio
nal accuracy, surface quality a
nd geometric shape of the plastic parts, a
nd the batch a
ndvolume quality of the plastic parts should be clearly defi
ned. The product uses the late
nt hor
n gate. From the poi
nt ofview of the mould, i
n order to reduce the cost,we must pay atte
ntio
n to the selectio
n a
nd i
nstallatio
n of the i
njectio
n machi
ne, a
nd desig
n the demouldi
ng mecha
nism. Therefore, it ca
n be desig
ned as a multi-cavity die to improve productivity. Therefore, this product uses a form of two pieces to form the processi
ng, greatly improvi
ng the productio
n efficie
ncy. We also
need to k
now the relatio
nship betwee
n the form of i
njectio
n machi
ne a
nd the mould, the desig
n of the mould structure as awhole, how to use the gati
ng system, pushi
ng mecha
nism, temperature regulati
ng system a
nd exhaust system, a
nd fi
nally complete the releva
nt desig
n calculatio
n of i
njectio
n mould. Keywords: late
nt gate, i
njectio
n machi
ne, demouldi
ng mecha
nism, pouri
ng system, pushi
ng mecha
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njectio
n mould 目录 摘要I Abstract II 1塑料材料分析1 1.1塑料材料的基本特性1 1．2塑件材料成型性能1 2塑件的工艺分析3 2.1塑件的结构设计4 2.2塑件尺寸及精度5 2.3塑件表面粗糙度5 2.4塑件的体积和质量5 3注射成型工艺方案7 3.1注射成型工艺过程分析[5] 7 3.2浇口种类的确定8 3.3型腔数目的确定8 3.4注射机的选择和校核8 3.4.1注射量的校核9 3.4.2塑件在分型面上的投影面积与锁模力的校核10 3.4.3模具与注射机安装模具部分相关尺寸校核10 4注射模具结构设计12 4.1分型面的设计12 4.2型腔的布局12 4.3浇注系统的设计13 4.3.1浇注系统组成13 4.3.2确定浇注系统的原则13 4.3.4分流道的设计16 4.3.5浇口的设计16 4.3.6冷料穴的设计17 4.4注射模成型零部件的设计[7] 17 4.4.1成型零部件结构设计17 4.4.2成型零部件工作尺寸的计算20 4.5排气结构设计21 4.6脱模机构的设计22 4.6.1推杆直径计算22 4.6.2推杆应力校核23 4.6.3脱模机构的选用原则24 4.6.4脱模机构类型的选择24 4.6.5推杆机构具体设计24 4.7注射模温度调节系统25 4.7.1温度调节对塑件质量的影响26 4.7.2冷却系统之设计规则26 4.8模架的选用27 5模具材料的选用30 5.1成型零件材料选用30 5.2注射模用钢种30 6注塑模工作原理31 设计心得体会32 参考文献33