A kind of 3D printing method of powder material

Abstract

The present invention proposes a 3D printing method for powder materials. First, the powder particles required for printing ceramic or metal workpieces are dispersed in the solution to make a 3D printing material liquid with uniform powder dispersion; Put into the material storage tank, because the solvent is volatilized by the heating of the light, it does not participate in the three-dimensional molding of the parts, and is only used to adjust the fluidity of the material liquid, so the thickness of the forming layer can be made thinner; the solvent is completely volatilized after heating, and the powder particles They are covered and connected by the precipitated solute to form a three-dimensional blank with high hardness, which is easy to maintain the proper shape and easy to take out after printing; the formed part is immersed in the material liquid as a whole, and the temperature of the blank is easy to maintain. , which can effectively reduce the warping deformation of the printed blank. Since the fluidity of the material liquid is regulated by the solvent, the polymer plays a role of filling and bonding here, and its content can be less than that of the powder. The lower polymer content can reduce the shrinkage of the green body after sintering .

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a 3D printing method for workpiece blanks made of materials such as metals and ceramics. Background technique [0002] There are two types of new ceramic forming processes, one is dependent on molds, which can manufacture ceramic parts with complex structures, but requires molds to shape ceramic slurry; the other is the application of rapid prototyping technology to ceramic green bodies. in manufacture. A variety of rapid prototyping technologies have been maturely applied to ceramic biscuit forming, but there are still various shortcomings and deficiencies. The density of the ceramic body made by the selective laser sintering process is low; the difficulty of the fused deposition forming process lies in the manufacture of ceramic filaments, and the dimensional accuracy of the microstructure is difficult to control; the disadvantage of the layered solid manufact...

AI Technical Summary

Problems solved by technology

However, the effective solid content of the biscuit manufactured by this process is not high enough, resulting in a relatively large shrinkage rate of the finished product made by sintering. In addition, its technical difficulty and manufacturing cost are also extremely high.

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