脉动压力保压对制品密度的影响研究  

Research of Pulsating Pressure on Part′s Density

作　　者：邹新良[1,2] 殷小春[1,2] 何光建[1,2] 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心,广东广州510641 [2]华南理工大学聚合物成型加工教育部重点实验室,广东广州510641

出　　处：《轻工机械》2010年第4期21-25,共5页Light Industry Machinery

基　　金：国家自然科学基金面上项目(x2jqB5081590);广东省博士启动基金(B02B6070330)

摘　　要：文章利用幂律模型建立了中心浇口圆盘模腔正弦脉动保压过程的数学模型,分析了脉动压力诱导保压对制品密度的影响。分析表明:靠近浇口处密度增量梯度较大,远离浇口处密度基本不变。随着压力波动系数的增大,平均密度都有升高的趋势。脉动压力诱导保压能有效提高制品的致密程度,对提高制品的性能有重要的影响。In this paper the mathematical model of sinusoidal pulsating preservation in a Center-gate disk-shaped mold was established by using of power-law constitutive model. Besides the influence of pulsating pressure on parts′ density was studied. The results show：the density increment gradient is larger near the gate,and the density is changed little far from the gate. With the incresing of the pressure fluctuation coefficient,the average density is apt to increase. The pulsating pressure inducing preservation can greatly improve products′ density and play an important role on products′ properties.[Ch,2 fig.1 tab.8 ref.]

关 键 词：注塑工艺 圆盘模腔 密度分布 幂律模型 正弦脉动 保压 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]