Optics and Precision Engineering, Volume. 28, Issue 4, 923(2020)
Effect of microscopic characteristics of constrained substrate on the inhibition zone and adhesion
To reduce the influence of adhesion on the process reliability and printing speed in constrained projection fast 3D printing processes. A low-cost constrained substrate scheme was presented with porous transparent support plate and PDMS film for inhibition zone realization. It focused on substrate light transmittance and gas permeability and their influence on the inhibition zone formation and adhesion. The quartz glass substrate with a microporous array was prepared using a laser processing method. The light transmittance, oxygen permeability of the substrate, and thickness of the oxygen inhibition zone were measured experimentally. The influence of the microscopic geometrical characteristics of the substrate on the light transmittance, oxygen permeability, and oxygen inhibition thickness was investigated. 3D printing experiments and a preliminary investigation of the adhesion of the cured layer on the substrate under different substrate conditions were conducted. The results indicate that the micro-pores on the substrate affect the light transmittance and oxygen permeability. The transmittance of the prepared micropores with different geometric features is found to be greater than 84%.The thickness of the oxygen inhibition zone can be controlled by adjusting the oxygen concentration, light intensity, and microstructure of the substrate. The oxygen supply conditions of the substrate affect the thickness of the inhibition zone and subsequently the cued layer peeling force. Adopting the prepared constrained substrateenables the formation of the inhibition layer during printing of the parts and significantly reduces peeling force.The average peeling force of the cured layer from the substrate reduces from 26.4 N to 5.4 N under the experimental conditions in this study.
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WANG Quan-dai, LIANG Min, SHI Bo-hui, LI Peng-yang, LI Yan. Effect of microscopic characteristics of constrained substrate on the inhibition zone and adhesion[J]. Optics and Precision Engineering, 2020, 28(4): 923
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Received: Aug. 27, 2019
Accepted: --
Published Online: Jul. 2, 2020
The Author Email: Quan-dai WANG (quandaiw@163.com)