Flow induced birefringence of weldline region in polystyrene injection molding

HAN Jian; SHEN Changyu; LIU Chuntai; WANG Songjie; CHEN Jingbo

您当前的位置：

首页 >

文章列表页 >

Flow induced birefringence of weldline region in polystyrene injection molding

更新时间：2025-12-10

- Flow induced birefringence of weldline region in polystyrene injection molding
- CIESC Journal Issue 5, Pages: 1305-1309(2008)
- 作者机构：
  
  郑州大学橡塑模具国家工程研究中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 May 2008，
  
  Published：05 May 2008
- 稿件说明：
移动端阅览
HAN Jian, SHEN Changyu, LIU Chuntai, et al. Flow induced birefringence of weldline region in polystyrene injection molding[J]. CIESC Journal, 2008, (5): 1305-1309.
DOI：

HAN Jian, SHEN Changyu, LIU Chuntai, et al. Flow induced birefringence of weldline region in polystyrene injection molding[J]. CIESC Journal, 2008, (5): 1305-1309. DOI：

摘要

带有熔接线的透明聚苯乙烯平板制品通过带嵌件的模具注射成型，利用光弹测试考察了不同工艺条件下的制品双折射行为，探讨了嵌件造成的相邻熔接线区域熔体流动行为及对制品双折射分布的影响。结果表明，保压压力和熔体温度对制品双折射整体分布影响明显;嵌件后熔接缝区域与制品其他区域的双折射行为有较大差异，其变化与熔体相遇后流动行为和熔接部位分子取向分布有关;制品最大双折射值出现在嵌件后一定距离处。热收缩实验进一步验证了上述结果。

Abstract

The effects of melt flow behavior and adjacent weld line formation behind the obstacle on the flow induced birefringence in the weld line region of the parts were investigated.Polystyrene parts with weld lines were injection-molded under various process conditions by means of a specially designed plate cavity with an obstacle.The photo-elasticity method was used to determine the gapwise-averaged birefringence along the flow direction of injection-molded parts.The results showed that melt temperature and packing pressure had a significant impact on the birefringence distribution of the molded parts.Birefringence pattern around the weld line region just behind the obstacle was apparently different from other regions of the part

which was attributed to the local flow behavior and molecular orientation distribution after the melt flow fronts met.The maximum value of gapwise-averaged birefringence along the weld line occurred at a small distance from the obstacle.Heat shrinkage test results of different locations at the adjacent weld line region were also consistent with the above results.

关键词

Keywords

references

Views

285

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mechanism and regulation of supercooling behavior in imidazolium-based ionic liquids

Methods of adaptive prediction and abnormal states traceability for sulphur content in flue gas desulfurization process

Identification of gas-liquid two-phase flow patterns in a riser based on recursive characteristics and CNN

Study on dissolution kinetics of erythromycin thiocyanate

Study on microstructure of NaCl solution ice centrifugal separation based on Micro-CT and deep learning

Related Author

No data

Related Institution

No data

⁰