Preparation method of rapid molding powder material used for three dimensional printing

Abstract

The invention discloses a preparation method of a rapid molding powder material used for three dimensional printing. The method is characterized in that the method comprises the following steps: 1, powder material pretreatment: mixing 88-96% of a powder material with 4-12% of 3-aminopropyltriethoxysilane, and grinding at a rotating speed of 500-1000rpm for 2-6h to obtain a pretreated powder material; and 2, molding material preparation: adding 50-70% by mass of water, adding 0.5-1.0% of polyethylene glycol monooleyl ether, stirring for dissolving, adding 2-10% of polyvinyl alcohol, heating for dissolving, adding 25-40% of the pretreated powder material, stirring for uniform mixing, putting the obtained mixture in a grinder, carrying out normal temperature mixing grinding for 10-15h, and carrying out spray drying to obtain the rapid molding powder material. The rapid molding powder material can be directly molded at a temperature of 85-100DEG 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

[0001] technical field [0002] The invention relates to a preparation method for three-dimensional printing rapid prototyping powder materials, belonging to the field of rapid prototyping materials, in particular to a preparation process for three-dimensional printing rapid prototyping alumina, silicon carbide and ceramic powder materials. Background technique [0003] 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 p...

AI Technical Summary

Problems solved by technology

[0005] 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

[0008] 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.