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Volume 14
Issue 16
10.3390/polym14163358
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Article

Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array

by
Xiaoyu Zhang
,
Tao Ding
,
Wanlin Wang
,
Jiezhen Liu
and
Can Weng
*
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Polymers 2022, 14(16), 3358; https://doi.org/10.3390/polym14163358
Submission received: 16 July 2022 / Revised: 13 August 2022 / Accepted: 15 August 2022 / Published: 17 August 2022
(This article belongs to the Collection Feature Papers in Polymer Processing and Engineering)
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Abstract

As one of the main methods for fabricating microstructured surfaces, micro-injection molding has the advantages of short cycle time, high production efficiency, and the potential for batch manufacturing. However, non-negligible residual stresses inside the molded part could affect the replication quality, dimensions, and physical properties of the microstructure. Therefore, studying the effects of processing parameters on residual stresses is a necessary prerequisite to ensure the successful fabrication of microstructured parts. In this paper, an injection molding simulation model of micro-pillar arrays was developed using molecular dynamics software, and a series of injection molding experiments were conducted. It was found that increasing the mold temperature and melt temperature can reduce the thermal residual stresses and molecular orientation stresses, and effectively improve the uniformity of residual stress distribution. The increase in the packing pressure can make the shear field of flow more intense and increase the molecular orientation stresses, thus making the residual stresses more severe.
Keywords: residual stress; injection molding; micro-pillar array; processing parameter residual stress; injection molding; micro-pillar array; processing parameter

Share and Cite

MDPI and ACS Style

Zhang, X.; Ding, T.; Wang, W.; Liu, J.; Weng, C. Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array. Polymers 2022, 14, 3358. https://doi.org/10.3390/polym14163358

AMA Style

Zhang X, Ding T, Wang W, Liu J, Weng C. Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array. Polymers. 2022; 14(16):3358. https://doi.org/10.3390/polym14163358

Chicago/Turabian Style

Zhang, Xiaoyu, Tao Ding, Wanlin Wang, Jiezhen Liu, and Can Weng. 2022. "Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array" Polymers 14, no. 16: 3358. https://doi.org/10.3390/polym14163358

APA Style

Zhang, X., Ding, T., Wang, W., Liu, J., & Weng, C. (2022). Study on the Effect of Processing Parameters on Residual Stresses of Injection Molded Micro-Pillar Array. Polymers, 14(16), 3358. https://doi.org/10.3390/polym14163358

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