Warpage prediction of the injection-molded strip-like plastic parts

doi:10.1016/j.cjche.2015.12.012

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (5): 665-670.DOI: 10.1016/j.cjche.2015.12.012

• 第25届中国过程控制会议专栏 • 上一篇下一篇

Warpage prediction of the injection-molded strip-like plastic parts

Chaofang Wang, Ming Huang, Changyu Shen, Zhenfeng Zhao

National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China

收稿日期:2015-02-11 修回日期:2015-08-11 出版日期:2016-05-28 发布日期:2016-06-14
通讯作者: Ming Huang
基金资助:
Supported by the Key Program of National Natural Science Foundation of China (11432003) and the Key Research Project for Henan Universities (15A430009).

Warpage prediction of the injection-molded strip-like plastic parts

Chaofang Wang, Ming Huang, Changyu Shen, Zhenfeng Zhao

National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China

Received:2015-02-11 Revised:2015-08-11 Online:2016-05-28 Published:2016-06-14
Contact: Ming Huang
Supported by:
Supported by the Key Program of National Natural Science Foundation of China (11432003) and the Key Research Project for Henan Universities (15A430009).

摘要/Abstract

摘要： Formost strip-like plastic injectionmolded parts, whose cross section size is much smaller than their length, the traditionalHele-Shawmodel and three-dimensionalmodel do notworkwell in the prediction of thewarpage because of their special shape. A newsolutionwas suggested in thiswork. The strip-like plastic partwas regarded as a little-curved beam macroscopically, and was divided into a few one-dimensional elements. On the section of each elemental node location, two-dimensional thermal finite element analysis was made to obtain the nonuniform thermal stress caused by the time difference of the solidification of the plastic melt in the mold. The stress relaxation, or equivalently, strain creep was dealt with by using a special computing model. On the bases of in-mold elastic stress, the final bendingmoment to the beamwas obtained and thewarpagewas predicted in good agreement with practical cases.

关键词: Strip-like plastic part, Warpage prediction, Injection molding, Numerical simulation

Abstract: Formost strip-like plastic injectionmolded parts, whose cross section size is much smaller than their length, the traditionalHele-Shawmodel and three-dimensionalmodel do notworkwell in the prediction of thewarpage because of their special shape. A newsolutionwas suggested in thiswork. The strip-like plastic partwas regarded as a little-curved beam macroscopically, and was divided into a few one-dimensional elements. On the section of each elemental node location, two-dimensional thermal finite element analysis was made to obtain the nonuniform thermal stress caused by the time difference of the solidification of the plastic melt in the mold. The stress relaxation, or equivalently, strain creep was dealt with by using a special computing model. On the bases of in-mold elastic stress, the final bendingmoment to the beamwas obtained and thewarpagewas predicted in good agreement with practical cases.

Key words: Strip-like plastic part, Warpage prediction, Injection molding, Numerical simulation

Chaofang Wang, Ming Huang, Changyu Shen, Zhenfeng Zhao. Warpage prediction of the injection-molded strip-like plastic parts[J]. Chinese Journal of Chemical Engineering, 2016, 24(5): 665-670.

Chaofang Wang, Ming Huang, Changyu Shen, Zhenfeng Zhao. Warpage prediction of the injection-molded strip-like plastic parts[J]. Chin.J.Chem.Eng., 2016, 24(5): 665-670.

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Warpage prediction of the injection-molded strip-like plastic parts

Warpage prediction of the injection-molded strip-like plastic parts

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