注塑制品翘曲变形的最显著影响因素  

Most Effective Factors Affecting Warpage of Injection Molded Parts

作　　者：曾亚森[1] 谢小鹏[2] 

机构地区：[1]中山火炬职业技术学院光机电工程系,广东中山528436 [2]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《中国塑料》2009年第6期69-73,共5页China Plastics

摘　　要：采用Moldflow进行了塑料制品注塑过程模拟实验,分析了模具温度、熔体温度、保压时间、保压压力、冷却时间、注射时间和速度/压力控制转换(V/P转换)对注塑制品翘曲的影响,从中确定影响最显著的注塑过程参数。首先按一次因子法进行实验,根据因子效应,各因子影响权重顺序为:保压时间>冷却时间>熔体温度>注射时间>V/P转换>保压压力>模具温度,其中熔体温度、保压时间、冷却时间、注射时间对制品的翘曲有明显影响;再采用田口实验方法对这4个因素进行模拟实验,用L9(34)正交表设计实验,根据实验数据计算信噪比以评判影响因子的权重,由翘曲信噪比、体积收缩率信噪比和缩痕指数信噪比三方面分析发现,熔体温度对制品翘曲的影响最为显著。Plastic injection molding was simulated using software Moldflow. Mold temperature, melt temperature, packing time, packing pressure, cooling time, injection time, and V/P switch were taken as the affecting factors on the warpage of injection molding parts. In one-factor-at-a-time experiments, the order of influencing weight was： packing time.cooling time.melt temperature〉injection time〉V/P switch.packing pressure〉mold temperature. The first four were further studied using Taguchi method in an L9 （3^4） orthogonal experiment. The effect of the factors was measured by signal-to-noise ratios （S/N） for warpage, volumetric shrinkage, and sink index. The result indicated that melt temperature was the most important factors for warpage.

关 键 词：注射成型 翘曲 田口方法 模流分析 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]