| 注塑工艺参数对制品残余应力和收缩的影响 |
| |
| 引用本文： | 奚国栋,周华民,李德群. 注塑工艺参数对制品残余应力和收缩的影响[J]. 化工学报, 2007, 58(1): 248-254 |
| |
| 作者姓名： | 奚国栋 周华民 李德群 |
| |
| 作者单位： | 华中科技大学模具技术国家重点实验室,湖北,武汉,430074;华中科技大学模具技术国家重点实验室,湖北,武汉,430074;华中科技大学模具技术国家重点实验室,湖北,武汉,430074 |
| |
| 摘 要： | 注塑成型工艺参数对制品的最终残余应力和收缩有着直接的影响。基于线性黏弹性模型模拟计算了注塑成型过程中由温度和压力引起的残余应力和收缩。以无定型材料PS和ABS为例，系统地研究了不同成型工艺条件下平板制件的最终残余应力和收缩，并和实验结果进行对比验证。结果表明：在流动方向上无定型材料的收缩基本保持不变，残余应力沿壁厚分布的形状也基本相同，但流动末端处的应力值稍大于流动入口处；保压压力是影响制品收缩的关键因素，提高保压压力和注射温度可以降低制品的最终收缩，而模具温度对收缩的影响较小。
|
| 关 键 词： | 注塑成型 残余应力 收缩 工艺参数 |
| 文章编号： | 0438-1157（2007）01-0248-07 |
| 收稿时间： | 2005-12-11 |
| 修稿时间： | 2005-12-022006-03-22 |
Effect of processing conditions on residual stress and shrinkage in injection molding |
| |
| XI Guodong,ZHOU Huamin,LI Dequn. Effect of processing conditions on residual stress and shrinkage in injection molding[J]. Journal of Chemical Industry and Engineering(China), 2007, 58(1): 248-254 |
| |
| Authors: | XI Guodong ZHOU Huamin LI Dequn |
| |
| Abstract: | In injection molding, the residual stress and shrinkage of the product are affected by processing conditions directly. A detailed linear thermoviscoelastic model was developed to calculate thermally and pressure induced residual stress and shrinkage in amorphous plastic parts. A systematic study on the effect of processing conditions on shrinkage and residual stress was made for PS and ABS. The results showed that the shrinkage for amorphous polymers was constant along the flow path, and the residual stress distribution through the thickness was almost the same in the flowpath, with a little higher stresses near the end. It indicated that the holding pressure was the key parameter, an increase in holding pressure and melt temperature caused a decrease in shrinkage and the effect of mold temperature on the shrinkage was much smaller. |
| |
| Keywords: | injection molding residual stress shrinkage processing condition |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载免费的PDF全文 |
