Powder, binder and forming process of 3DP method three-dimensional printing

Abstract

The invention relates to the field of powdered materials and 3D printing, in particular to a powder, binder and forming process of 3DP method three-dimensional printing. The method of preparing the powder includes steps of using metal powder with particle diameters of 15-45 [[mu]m as a matrix, adding polyvinyl alcohol powder with particle sizes of 120-300 meshes and starch with particle diametersof 5-20 [mu]m into the matrix, and mixing the powder evenly by a three-dimensional mixer to obtain a powder material; the method of preparing the binder includes steps of using distilled water as a base solution, and adding an ethanol solution and dissolving the polyvinylpyrrolidone powder in the base solution, specifically, the volume ratio of the distilled water to the ethanol is 9:1, and the mass fraction of the polyvinylpyrrolidone in the mixed solution of the distilled water and the ethanol is 0.1% -0.3%; and the 3DP three-dimensional method is used to spray the binder onto the prepared powder material to print into a three-dimensional blank, and a workpiece is obtained after the three-dimensional blank is subjected to drying, powder removing, debinding and sintering. By means of thepowder and the binder of 3DP method three-dimensional printing, defects of poor adhesion and poor fluidity of the powder and the binder of the conventional 3DP method are effectively overcome to a certain extent.

Description

technical field [0001] The invention relates to the field of powder materials and 3D printing, in particular to a powder material, a binder and a forming process for 3D printing by 3DP method. Background technique [0002] At present, 3D printing technology is developing rapidly. Among them, 3DP three-dimensional printing technology has become one of the most dynamic rapid prototyping technologies due to its advantages of low equipment cost, low energy consumption, and fast forming speed. However, the technology of 3DP three-dimensional printing technology in the preparation of metal parts is still immature, and the precision and material density of the parts are not high. [0003] 3DP three-dimensional printing is a rapid prototyping technology in which powder is bonded layer by layer to form a required three-dimensional entity by spraying a binder. There are two main types of 3D printing forming methods in the existing 3DP method. The first type is formed by directly bon...

AI Technical Summary

Problems solved by technology

The technical solution provided by the invention can make up to a certain extent the defects of poor cohesiveness and poor fluidity existing in the powder and binder preparation process of the existing 3DP three-dimensional printing