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A kind of gypsum material for 3D printing and preparation method thereof

A 3D printing and gypsum material technology, which is applied in the field of 3D printing gypsum powder materials and liquid phase materials, can solve problems such as poor fluidity, poor toughness, and low strength, and achieve resolution improvement, printing error reduction, and specific surface area big effect

Active Publication Date: 2018-06-05
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a 3D printing gypsum powder material and liquid phase material for 3DP three-dimensional rapid prototyping, which solves the problems of low strength, poor fluidity, large fineness and poor toughness in the prior art

Method used

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  • A kind of gypsum material for 3D printing and preparation method thereof

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preparation example Construction

[0017] The preparation method of gypsum material for 3D printing is carried out according to the following steps:

[0018] According to the ratio of parts by mass, weigh 90-98 parts of hemihydrate gypsum, 1-10 parts of filling material, and 1-2 parts of fiber, and mix them well to form a powder material; according to the ratio of parts by mass, weigh 80-90 parts 1 part of water, 5-15 parts of flexible bonding material, 1-5 parts of coagulation accelerator material, fully dissolved by stirring and mixing to obtain liquid phase material; 3D printing is formed by spraying 0.25-1 part of liquid phase material according to 1 part of powder material .

Embodiment 1

[0020] 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=25 μm, and limestone powder d0.5= 15μm, glass fiber length 1mm, and then mixed to make a powder material; 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 stir , Mix and fully dissolve to obtain the liquid phase component material; the liquid phase material is sprayed onto the powder material through the 3D printer according to the ratio of 1 part liquid phase material to 2 parts powder material, and then large gypsum products such as molds can be printed.

Embodiment 2

[0022] 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, and silica Powder d0.5=10μm, lignocellulose length 1mm, and then mixed to make powder material; according to the ratio of parts by mass, weigh 90 parts of water, 5 parts of redispersible latex powder, 5 parts of calcium nitrate, stir and mix Fully dissolve to obtain the liquid phase component material; the liquid phase material is sprayed onto the powder material according to the ratio of 1 part liquid phase material to 4 parts powder material through the 3D printer to print high-strength small plaster models and molds.

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Abstract

The invention discloses a gypsum material for 3D printing. According to the parts by mass, 1 part of powder material and 0.25-1 part of liquid phase material are used to print and form gypsum products through a 3D printer. The powder material is prepared according to the ratio of parts by mass. Composition of the following raw materials: 90-98 parts of hemihydrate gypsum, 1-10 parts of filling material, 0-2 parts of fiber; the liquid phase material is composed of the following raw materials according to the ratio of parts by mass: 80-90 parts of water, 5-15 parts of flexible Adhesive material, 1-5 parts of accelerator material. The problems of low strength, poor fluidity, large fineness and poor toughness existing in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing materials, and relates to a gypsum powder material and a liquid phase material for 3D printing. Background technique [0002] 3D printing technology (also known as additive manufacturing technology) is a kind of additive manufacturing technology that appeared in the 1980s and emerged in recent years. Rapid manufacturing technology is not only hailed as a revolution in manufacturing, but also considered to be "one of the important symbols of the third industrial revolution". 3D printing technology is currently mainly used in product prototypes, mold manufacturing, artistic creation, jewelry making and other fields to replace traditional fine processing techniques in these fields. Among other things, the technology has applications in footwear, architecture, engineering and construction, automotive, aerospace, dental and medical industries, education, geographic information systems, civil engin...

Claims

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Application Information

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