中国塑料 ›› 2021, Vol. 35 ›› Issue (1): 67-72.DOI: 10.19491/j.issn.1001-9278.2021.01.011

• 加工与应用 • 上一篇    下一篇

球形转角形状对于改善微结构塑件填充不平衡的实验研究

徐斌, 邓鈴苹, 杨宏韬, 罗涛佳, 冯学良, 胡李   

  1. 西南科技大学制造过程测试技术教育部重点实验室,四川 绵阳 621010
  • 收稿日期:2020-05-19 出版日期:2021-01-26 发布日期:2021-01-22
  • 基金资助:
    大学生创新基金(CX19-111)

Experimental Study on Effect of Spherical Corner Shape on Improvement of Filling Imbalance of Microstructural Plastic Parts

XU Bin, DENG Lingping, YANG Hongtao, LUO Taojia, FENG Xueliang, HU Li   

  1. Key Laboratory of Testing Technology for Manufacturing Process,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China
  • Received:2020-05-19 Online:2021-01-26 Published:2021-01-22

摘要:

在流道分级部位设置直角转角、球形转角改善微注塑件充填不平衡。设计带有直径分别为200 μm与300 μm微圆柱的孔的1模8腔注塑模具,以高密度聚乙烯(PE-HD)材料进行实验。结果表明,随着注射速率和模具温度的逐渐增加,球形转角对改善填充不平衡优于直角转角;随着微圆柱孔特征尺寸的增大,直角转角与球形转角对填充不平衡的改善均会提高。

关键词: 转角形状, 微注塑, 填充不平衡, 微圆柱

Abstract:

The right-angle corners and spherical corners were arranged in the grading part of the flow channel to improve the filling imbalance of microinjection-molded parts. An eight?cavity injection mold with micro-cylinder holes at diameters of 200 and 300 μm was designed. The injection-molding experiment was carried out with high?density polyethylene (PE-HD) as a raw material. The results indicated that as the injection rate and mold temperature increased gradually, the spherical corners became better than the right?angle ones for improving filling imbalance. With an increase in the feature size of the micro?cylindrical hole, the improvement of the filling imbalance could be further enhanced by the right?angle corners and the spherical corners.

Key words: corner shape, micro injection molding, unbalanced filling, micro cylinder

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