Precision Control in Vat Photopolymerization Based on Pure Copper Paste: Process Parameters and Optimization Strategies

Author:

Wang Weiqu1,Feng Mengzhao1,Wang Zhiwei1,Jiang Yanlin2,Xing Bohang1,Zhao Zhe12

Affiliation:

1. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China

2. Jiaxing CeramPlus Technology Co., Ltd., Jiaxing 314100, China

Abstract

Vat photopolymerization (VPP) presents new opportunities for metals to achieve the design freedom of components. However, the material properties of copper powder and the inherent defects of the technology seriously hinder its application in high-precision metal additive manufacturing. Precision control is the key to obtaining minimal precision metal parts when copper is prepared by reduction photopolymerization. This paper employed variance analysis (ANOVA) and root mean square deviation (RMSD) to determine the significant parameters affecting dimensional accuracy and their optimal regions. The results show that printing accuracy is improved by optimizing exposure time, intensity, layer thickness, and sweeper moving speed. When the exposure time is 21 s, and the exposure intensity is 220 mW/cm2, a hole with a height of 1 mm and a diameter of 200 μm can be printed with a minimum size deviation of 51 μm. In addition, RMSD and ANOVA provide an effective method for realizing high-precision stereolithography 3D printing metal copper, expanding the material adaptation in the 3D printing metals field. The study highlights the potential of VPP as a method for preparing metals in future studies.

Funder

National Key R&D Program of China

Publisher

MDPI AG

Subject

General Materials Science

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