微注射成型工艺的实验研究  

Experimental investigation into process of micro injection molding

作　　者：庄俭[1,2] 吴大鸣[1] 赵中里[1] 张洪波 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]宁波海天塑机集团有限公司,浙江宁波315821

出　　处：《化工学报》2009年第4期1040-1045,共6页CIESC Journal

基　　金：中国博士后科学基金项目(20080440301);博士后工作站项目~~

摘　　要：设计了微注射模具的变温系统,加工了通道宽度分别为500μm和100μm的哑铃形微型腔。在此基础上,基于Taguchi实验设计方法进行了成型工艺实验。结合微尺度下熔体充模流动理论及微尺度效应,研究了工艺参数及其交互作用对微结构塑件成型质量的影响规律。实验结果表明,随着微结构塑件特征尺寸的减小,注射压力和模具温度对填充率的影响明显增强;熔体温度对填充率的影响程度有所增加;注射行程对填充率的影响程度有所降低;保压压力和保压时间对填充率的影响相对不明显。A variothermal system of micro injection molding was designed, and two dumb-bell-shaped microcavities with microchannels of width 500μm and 100μm were fabricated. The molding process experiments were completed based on the Taguchi method. By considering the polymer melt flow theory on microscale and the microscale effect, the influences of the process parameters and their interactions on the molding quality of micro-structured plastic parts were investigated. The experimental results showed that with the decrease of characteristic dimension of micro-structured plastic parts the effect levels of injection pressure and mold temperature on volume filling percentage were both obviously enhanced, the influence of melt temperature was increased to some extent, that of injection stroke was reduced, and those of hold pressure and hold time were relatively unconspicuous.

关 键 词：微注射成型 成型工艺 模具变温 工艺参数 

分 类 号：TG76[金属学及工艺—刀具与模具] TQ320[化学工程—合成树脂塑料工业]