Method for preparing evanescent mode by using 3DP printing technology

Abstract

The invention belongs to the technical field of 3D printing, and discloses a method for preparing an evanescent mode by using a 3DP printing technology. The computer three-dimensional modeling is performed according to the structural shape and size of an evanescent mode to be printed, and a three-dimensional model is divided into two-dimensional sections; PMMA powder is flatly paved in a 3DP printing platform; a binding agent-liquid phenolic resin is sprayed on the PMMA powder plane according to section information provided by the two-dimensional sections to finish printing of one layer; the height of the printing platform is lowered by one layer; a layer of PMMA powder is continuously and flatly paved on the surface of the printed layer; then, the binding agent is sprayed; the powder pavement and the spraying are repeated like this; the layers are superposed; a semi-finished model is obtained after printing; redundant powder around the semi-finished model is removed; and then, the semi-finished model is dipped in molten paraffin by 15-30 min, and is taken out for airing to obtain the evanescent mode. The evanescent mode with high molding precision and low product shrinkage rate can be obtained by the 3DP printing technology within shorter time.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for preparing lost foam by using 3DP printing technology. Background technique [0002] As an emerging material processing and molding technology, 3D printing technology has become one of the important symbols of the third industrial revolution. As an emerging technology in the field of rapid prototyping, 3D printing technology is developing very rapidly. Based on digital model files, it uses engineering plastics or Adhesive properties such as metal powder can quickly and accurately manufacture parts with complex structures by layer-by-layer printing, realizing "free manufacturing", which solves the limitations of difficult or impossible processing of traditional processes, greatly shortens the cycle, and can be widely used Applications and industries such as medical treatment, culture, national defense, aerospace, automobile and metal manufacturing. [...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing lost foam using 3DP printing technology. Using three-dimensional printing (3DP) technology, it has the advantages of high molding precision, fast molding speed, small product shrinkage, and low cost. 3D printing technology has disadvantages such as slow forming speed, poor mechanical properties and various defects