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Design and Experiment of a 3D Printing System for Ceramics by Continuous Extrusion
Y. CHAO1, X. LIU2
1 College of Mechanical and Electrical Engineering, Xuchang University, Xuchang 461000, China
2 Xuchang Tobacco Machinery Co. Ltd, Xuchang 461000, China
received June 24, 2019, received in revised form August 12, 2019, accepted August 14, 2019
Vol. 10, No. 2, Pages 1-10 DOI: 10.4416/JCST2019-00048
Abstract
In order to solve the problems of the brittleness, high hardness, complex shapes, long production times and high cost of ceramic parts, a novel 3D printing system for ceramics is proposed for the fabrication of ceramic parts by means of continuous extrusion. Based on an analysis of the principle of continuous extrusion of ceramics as a forming process, the system structure, nozzle extrusion device and motion control system were developed. The influence of the process parameters on the quality and defects of printed parts was analyzed in a series of printing experiments. The causes of defects (tiny cracks, porosity, holes and irregular morphology) were explored and summarized. Precise contours, size and high bonding quality can be obtained when the printing speed is matched well to the speed of ceramic extrusion. Vases and model heads were fabricated using the 3D printing system. The results of the experiments show that the 3D printing system can meet the precision requirements for ceramic parts. The feasibility and correctness of the 3D ceramic printing technique are verified.
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Keywords
3D ceramic printing, continuous extrusion, nozzle extrusion device, bonding quality.
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