Preparation method of 3D printing inorganic powder molding material

Abstract

The invention discloses a preparation method of a 3D printing inorganic powder molding material. The method is characterized in that the method comprises the following steps: 1, powder material pretreatment: mixing 10-30% of acetone with 62-85% of a powdery material and 2-10% of gamma-(2,3-epoxypropoxy)propyltrimethoxysilicane, and grinding the obtained mixture at a rotating speed of 500-1000rpm for 1-2h to obtain a pretreated powdery material; and 2, molding material preparation: adding 40-65% by mass of acetone, adding 2-8% of polyvinyl formal, stirring for dissolving, adding 30-55% of the pretreated powdery material, stirring for uniform mixing, putting the obtained solution in a grinder, carrying out normal temperature mixing grinding at a rotating speed of 500-1000rpm for 6-9h, and carrying out spray drying to obtain the 3D printing inorganic powder molding material. The 3D printing inorganic powder molding material can be directly molded at a temperature of 190-210DEG C under a pressure of 1-10MPa without sprinkling a binder, and has the advantages of simple preparation technology, easy condition control, low production cost and easy industrialized production.

Description

technical field [0001] The invention relates to a method for preparing 3D printing inorganic powder molding materials, which belongs to the field of rapid prototyping materials, and in particular to a preparation process for 3D printing rapid prototyping inorganic powder materials. Background technique [0002] Rapid Prototyping Technology, also known as Rapid Prototyping Manufacturing (RPM) technology, was born in the late 1980s. It is a high-tech manufacturing technology based on the material accumulation method and is considered to be a major achievement in the manufacturing field in recent years. It integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, material science, and laser technology, and can automatically, directly, quickly and accurately transform design ideas into prototypes with certain functions or directly manufacture parts , so as to provide a high-efficiency and low-cost real...

AI Technical Summary

Problems solved by technology

[0004] 3D printing technologies include 3DP technology, FDM fusion lamination molding technology, SLA stereolithography technology, SLS selective laser sintering technology, DLP laser molding technology and UV ultraviolet molding technology. The most widely used is FDM3D printing technology. This technology can be used in the home. It is easy to operate and the materials used are generally available. The products printed by this technology are also close to our daily necessities. The materials used are mainly environmentally friendly polymer materials. Such as: PLA, PCL PHA PBS PA ABS PC PS POM PVC, because this technology is generally printed on the desktop, the odor produced by the molten polymer material or the harmful substances produced by decomposition directly contact with our people, which is easy to cause safe question

[0007] Due to the large particle size of the 3DP rapid prototyping material powder, it is difficult to form thin-walled parts, the forming accuracy of tiny parts is not high enough, and the surface has a relatively rough feeling; in addition, because the binder is not strong enough, there is a low strength of the formed part Not enough

In addition, the 3DP molding materials currently sold in the market are basically monopolized by foreign companies, and the price is high, which seriously restricts the promotion and popularization of 3DP molding technology in my country.