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Preparation applied to three-dimension printing technology forming plaster powder material

A three-dimensional printing and gypsum powder technology, applied in the direction of additive processing, can solve the problems of easy clogging of nozzles, large amount of adhesive, and poor control, and achieve the effects of good fluidity, low production cost, and reduced dosage.

Inactive Publication Date: 2017-02-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this molding process also has certain limitations. The amount of adhesive used is large, which is difficult to control, and the adhesive is easy to block the nozzle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of granulated gypsum powder: In the reactor, add water: 5L, urea-formaldehyde resin: 80 g, heat to dissolve, after cooling, add gypsum powder: 4500 g, stir vigorously, react for 50 minutes, and then add Oxalic acid: 8g, stirred and dissolved, and then spray-dried to obtain granulated gypsum powder with a particle size in the range of 30-100µm;

[0023] (2) Preparation of gypsum powder materials for three-dimensional printing process: In the grinder, add respectively, granulated gypsum powder: 85 g, o-cresol novolac epoxy resin: 5 g, calcium stearate: 1.0 g, urea: 0.5 g, turn on the grinder at 200 rpm, grind for 40 min, acetone: 12 mL, grind at 200 rpm, grind for another 20 min, and dry to obtain molding gypsum powder for 3D printing Body material, the particle size of the obtained gypsum powder material for three-dimensional printing process molding is in the range of 30-120 μm.

Embodiment 2

[0025] (1) Preparation of granulated gypsum powder: In the reactor, add water: 5L, urea-formaldehyde resin: 50 g, heat to dissolve, after cooling, add gypsum powder: 4000 g, stir vigorously, react for 40 minutes, and then add Oxalic acid: 5g, stirred and dissolved, and then spray-dried to obtain granulated gypsum powder with a particle size in the range of 30-100µm;

[0026] (2) Preparation of gypsum powder materials for three-dimensional printing process: In the grinder, add respectively, granulated gypsum powder: 800 g, o-cresol novolac epoxy resin: 80 g, calcium stearate: 5 g, urea: 2 g, turn on the grinder at 200 rpm, grind for 40 min, acetone: 140 mL, grind at 200 rpm, grind for another 20 min, and dry to obtain molding gypsum powder for 3D printing Body material, the particle size of the obtained gypsum powder material for three-dimensional printing process molding is in the range of 30-120 μm.

Embodiment 3

[0028] (1) Preparation of granulated gypsum powder: In the reactor, add water: 10L, urea-formaldehyde resin: 100 g, heat to dissolve, after cooling, add gypsum powder: 9000 g, stir vigorously, react for 60 minutes, then add Oxalic acid: 10g, stirred and dissolved, and then spray-dried to obtain granulated gypsum powder, the particle size of which is in the range of 30-100µm;

[0029](2) Preparation of gypsum powder materials for three-dimensional printing process: In the grinder, add respectively, granulated gypsum powder: 88g, o-cresol novolac epoxy resin: 4 g, calcium stearate: 0.2 g, urea: 0.1 g, turn on the grinder at 200 rpm, grind for 40 min, acetone: 10 mL, grind at 200 rpm, grind for another 20 min, and dry to obtain a gypsum powder for 3D printing Material, the particle size of the obtained gypsum powder material used in the three-dimensional printing process is in the range of 30-120 μm.

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Abstract

The invention discloses a preparation method applied to a three-dimension printing technology forming plaster powder material. The preparation method is characterized by comprising the steps of firstly preparing plaster powder into granulated plaster powder with the particle size in a range of 30 to 100mu m; then adding the following ingredients into a grinding miller in mass percentage: 80% to 88% of the granulated plaster powder, 2% to 8% of o-cresol novolac epoxy resin, 0.2% to 1.5% of calcium stearate and 0.1% to 1.0% of urea; starting the grinding miller according to the rotation speed of 200 revolutions per minute and grinding for 40min; then adding 6% to 15% of aceton, wherein the percent sum of all the ingredients is 100 percent; then grinding for 20min with the rotation speed of the grinding miller of 200 revolutions per minute; drying to obtain the three-dimension printing technology forming plaster powder material, wherein the particle size of the obtained three-dimension printing technology forming plaster powder material is in a range of 30 to 120mu m. The material can be directly formed on a three-dimension printer, the material is high in sphericity, good in fluidity and high in forming accuracy, and furthermore, the material is simple in preparation technology, easy for condition control, low in production cost and easy for industrial production.

Description

technical field [0001] The invention relates to a preparation method for a three-dimensional printing (3DP) process rapid prototyping powder material, which belongs to the field of rapid prototyping materials, and in particular to a preparation method and application of a three-dimensional printing process forming gypsum powder material. Background technique [0002] Gypsum is a monoclinic mineral whose main chemical composition is calcium sulfate (CaSO 4 ) hydrate. It is usually white and colorless, and the colorless transparent crystal is called gypsum. Sometimes it becomes gray, light yellow, light brown and other colors due to impurities. Streaks white. transparent. Vitreous luster, cleavage surface pearl luster, fibrous aggregates silky luster. Relative density 2.3. Gypsum powder is one of the five major gel materials, which occupies an important position in the national economy and is widely used in many application fields such as construction, building materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B33Y70/00
CPCB33Y70/00C04B28/14C04B2111/00181C04B24/307C04B24/04C04B24/302C04B24/085C04B24/126
Inventor 李慧芝李冬梅许崇娟
Owner UNIV OF JINAN