A parameter selection method to solve the salivation phenomenon of ceramic slurry 3D printing

Abstract

The invention discloses a parameter selecting method for solving the phenomenon of salivation of 3D printing of ceramic pulp. The parameter selecting method comprises the following steps of determining parameter range of microflow extruding of the ceramic pulp for 3D printing; obtaining a mathematical model of extruding resistance of the ceramic pulp and salivation section length of the ceramic pulp; using the inner diameter of an extruding opening, the length of the extruding opening, the inner diameter of a feeding cylinder and the extruding speed of the ceramic pulp as parameters to be optimized, and using the numeric areas of the four parameters as constraint conditions; using the extruding resistance of the ceramic pulp and the salivation section length of the ceramic pulp as an adaptability degree function; combining the adaptability degree function and the constraint conditions to form a multi-target optimizing problem, setting two weight coefficients of the adaptability degreefunction, and converting a multi-target optimizing problem into a single-target optimizing problem; using a genetic algorithm to find the solution of the single-target optimizing problem, so as to obtain an optimal solution; and according to the optimal solution, selecting a parameter type. According to the parameter selecting method disclosed by the invention, a multi-target optimizing method isadopted to perform parameter design, so that the problem of salivation is solved, and the situation that the extruding resistance is minimum is guaranteed.

Description

technical field [0001] The invention belongs to the field of ceramic 3D printing, in particular to a parameter selection method for solving the drooling phenomenon of ceramic slurry 3D printing. Background technique [0002] In recent years, ceramic materials have been widely used in aerospace, biology, medical and other fields. Due to the long forming time and complex forming process of traditional ceramic forming processes, more and more rapid prototyping processes are used to manufacture ceramic products, and ceramic slurry 3D printing is one of them. The ceramic slurry is prone to salivation during the 3D printing process based on the microfluidic extrusion process. Drooling is the phenomenon in which the ceramic slurry still flows out when the extrusion is interrupted or stopped. The appearance of salivation will affect the quality of ceramic 3D printing products, and this phenomenon should be avoided as much as possible in ceramic 3D printing based on the microfluidi...

AI Technical Summary

Problems solved by technology

However, using this parameter design method for ceramic slurry 3D printing may cause salivation. Although the phenomenon of salivation has been solved, the resistance of the ceramic slurry during the extrusion process is too large, and the ceramic slurry cannot be extruded stably.

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