A kind of rapid prototyping material for three-dimensional printing and its preparation method

Abstract

The invention discloses a rapid prototying material for three-dimensional printing. The rapid prototying material for three-dimensional printing comprises modified gypsum-based powder material, and an aequous adhesive for prototying the powder material, wherein the modified gypsum-based powder material comprises 70-85% of gypsum powder, 5-15% of a polysaccharide gel particle, 5-10% of sodium alginate, and 0.5-5% of additive; the aqueous adhesive is a water aqueous containing high-valence cations. The rapid prototying material for three-dimensional printing is fast to harden, and high in prototying precision; a prepared printing product is high in pressure resistance and high in waterproofing performance, and can be applied to the fields of medial model manufacturing, industrial die manufacturing, building design, and the like.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional printing, and relates to a three-dimensional printing rapid prototyping material and a preparation method of the material. Background technique [0002] With the rapid development of modern science and technology, the society pays more and more attention to production efficiency. Manufacturing enterprises must design products that meet more requirements and have higher cost performance within the shortest possible research and development cycle, in order to seize the opportunity in the fierce market competition. The development and trial production of new products using traditional manufacturing techniques requires a number of high-level skilled workers to use a variety of machining equipment and tools, which is not only costly but also long-term, and it is difficult to adapt to the rapidly developing market requirements. [0003] 3D printing rapid prototyping (Three Dimension Printing, ...

AI Technical Summary

Problems solved by technology

[0005] For ordinary gypsum powder, although it can be hardened when exposed to water, the hardening time takes 7 to 8 minutes. The hardening speed is too slow to provide a certain strength support in the shortest time to ensure the local molding of the mold, which affects the rapid prototyping of 3DP technology. Work efficiency and accuracy of printed parts

In addition, since 3DP technology is formed by bonding the powder layer by layer by spraying a binder, there are a large number of pores on the surface and inside of the printed part, and the compressive strength is less than 2MPa, so the use is severely limited

[0006] CN 1850694A discloses a gypsum-based material system for three-dimensional spraying and bonding and its preparation method. The prepared material has high precision and small dimensional deformation, but has the disadvantages of poor water resistance and insufficient strength. At the same time, printing for the preparation of the material is still required post-processing

[0007] CN 103992088A discloses a rapid prototyping powder for three-dimensional printing and its preparation method and application. It adds thermoplastic resin and other powders that are in a molten state when heated to the gypsum-based powder material, and then heats the printed part through post-processing Improve the strength, but the hardening speed of gypsum powder is slow, it is difficult to ensure the accuracy of printed parts

[0008] CN 103709917A discloses a post-treatment liquid for three-dimensional printing devices and its preparation method and application, which can effectively improve the strength of the device by soaking the three-dimensional printing device in two kinds of post-treatment liquids and then taking it out for heat treatment. However, the operation steps are very cumbersome, and the device needs to be soaked in two kinds of treatment solutions successively to achieve the enhanced effect.