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Gypsum material for 3D printing and preparation method thereof

A technology of 3D printing and gypsum materials, which is applied to 3D printing gypsum materials. In the field of preparation of gypsum materials, it can solve problems such as poor fluidity, low strength, and poor toughness, and achieve improved resolution, large specific surface area, and reduced printing. effect of error

Active Publication Date: 2015-07-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a gypsum material for 3D printing, which solves the problems of low strength, poor fluidity, large fineness and poor toughness in the prior art

Method used

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  • Gypsum material for 3D printing and preparation method thereof

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preparation example Construction

[0035] The preparation method of gypsum material for 3D printing is carried out according to the following steps:

[0036] According to the ratio of parts by mass, weigh 90-98 parts of hemihydrate gypsum, 1-10 parts of filler material, and 1-2 parts of fibers, and mix them thoroughly to form powder materials; according to the ratio of parts by mass, weigh 80-90 parts Parts of water, 5-15 parts of flexible bonding materials, 1-5 parts of coagulation materials, and fully dissolved by stirring and mixing to obtain liquid-phase materials; during 3D printing, 0.25-1 parts of liquid-phase materials are sprayed according to 1 part of powder material for molding .

Embodiment 1

[0038] According to the ratio of parts by mass, weigh 95 parts of α-hemihydrate gypsum, 4.5 parts of limestone powder, and 0.5 part of glass fiber, wherein the aspect ratio of hemihydrate gypsum is 1:1.2, d0.5=25μm, limestone powder d0.5= 15μm, glass fiber length of 1mm, and then mixed to make powder materials; according to the ratio of parts by mass, weigh 85 parts of water, 5 parts of polyvinyl alcohol, 5 parts of hydroxypropyl methylcellulose, 5 parts of sodium sulfate, and stirred , Mixing and fully dissolving to obtain the liquid component material; the liquid material is sprayed onto the powder material by the 3D printer according to the ratio of 1 part of the liquid material to 2 parts of the powder material, and then large-scale gypsum products such as molds can be printed.

Embodiment 2

[0040] According to the ratio of parts by mass, weigh 98 parts of α-hemihydrate gypsum, 1 part of silica powder, and 1 part of lignocellulose, wherein the aspect ratio of hemihydrate gypsum is 1:1.5, d0.5=15 μm, silica Powder d0.5=10μm, lignocellulose length 1mm, and then mixed to make powder materials; according to the ratio of parts by mass, weigh 90 parts of water, 5 parts of redispersible latex powder, and 5 parts of calcium nitrate, after stirring and mixing Fully dissolve the liquid phase component material; the liquid phase material is sprayed onto the powder material by the 3D printer according to the ratio of 1 part of the liquid phase material to 4 parts of the powder material to print high-strength small gypsum models and molds.

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Abstract

The invention discloses a gypsum material for 3D printing. The gypsum material is that a gypsum product is printed and formed through 1 part by mass of powder and 0.25 to 1 part by mass of liquid-phase material by a 3D printer, wherein the powder is prepared from the following raw materials in parts by mass: 90 to 98 parts of hemihydrate gypsum, 1 to 10 parts of filling material, and 0 to 2 parts of fibers; the liquid-phase material is prepared from the following raw materials in parts by mass: 80 to 90 parts of water, 5 to 15 parts of flexible adhering material, and 1 to 5 parts of coagulating material. The invention further discloses a preparation method of the gypsum material for 3D printing; the gypsum material is prepared by mixing and uniformly agitating all raw materials. The gypsum material for 3D printing and the preparation method have the advantage that the problems of small strength, poor fluidity, large fineness and poor flexibility in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing materials, relates to a gypsum material for 3D printing, and also relates to a preparation method of the gypsum material. Background technique [0002] 3D printing technology (also known as additive manufacturing technology) is a kind of technology that appeared in the 1980s and emerged in recent years, with the basic characteristics of material accumulation and the goal of directly manufacturing parts, and has broad development prospects. Rapid manufacturing technology is not only known as a revolution in manufacturing, but also considered as "one of the important symbols of the third industrial revolution". 3D printing technology is currently mainly used in product prototypes, mold manufacturing, art creation, jewelry making and other fields to replace the traditional fine processing technology in these fields. In addition to this, the technology has applications in footwear, architecture, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B33Y70/00
Inventor 唐明亮沈晓冬郑海沈裕盛胡增涵
Owner NANJING UNIV OF TECH
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