Rapid-molding powder material for three-dimensional printing as well as preparation method and application thereof

A powder material and three-dimensional printing technology, which is applied in the field of rapid prototyping powder materials and their preparation, can solve the problems of insufficient water resistance and strength, complex post-processing, and insufficient strength of devices, and achieve high density, wide source of raw materials, and preparation methods simple effect

Inactive Publication Date: 2014-08-20
GUANGDONG IND TECHN COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN201010530017.X discloses a three-dimensional rapid prototyping material and its preparation method, which mainly includes salt powder, metal powder, plastic powder and wax powder-based powder materials, and its existing problem is that more complicated post-processing is required
The material prepared by it has high precision and small dimensional deformation, but has the disadvantages of poor water resistance and insufficient strength, and still needs post-processing
[0005] At present, the most widely used 3D printing powders on the market are Z Corp’s gypsum-based powders ZP15E and ZP100. However, due to the hygroscopicity of cellulose and gypsum in the ingredients, although it is not easy to stick to powder, the printed devices are water-resistant Insufficient in sex and strength, post-processing is still required

Method used

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  • Rapid-molding powder material for three-dimensional printing as well as preparation method and application thereof
  • Rapid-molding powder material for three-dimensional printing as well as preparation method and application thereof
  • Rapid-molding powder material for three-dimensional printing as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A composite powder for three-dimensional rapid prototyping, consisting of the following raw materials in mass percentage:

[0047]

[0048] During preparation, firstly mix α-type calcium sulfate hemihydrate gypsum powder (commercially available high-strength gypsum powder with whiteness of 92%, standard thickness of 42%, initial setting time of 2 to 3 minutes, and 2h flexural strength of 6.50MPa) And polyurethane powder (polyurethane powder TPU-70*20) was sieved into three parts with particle sizes ranging from 1 μm to 30 μm, 30 μm to 50 μm, and 50 μm to 70 μm, and the mass percentages of the three parts were respectively 5%, 70%, and 25% as The required α-type calcium sulfate hemihydrate gypsum powder and polyurethane powder in this embodiment.

[0049] The above-mentioned α-type calcium sulfate hemihydrate gypsum powder and polyurethane powder obtained above are added in the mixer and mixed for 20min, then polyvinyl alcohol (polyvinyl alcohol 1788 produced by Shang...

Embodiment 2

[0051] A composite powder for three-dimensional rapid prototyping, consisting of the following raw materials in mass percentage:

[0052]

[0053] During preparation, firstly mix α-type calcium sulfate hemihydrate gypsum powder (commercially available high-strength gypsum powder with whiteness of 92%, standard thickness of 28%, initial setting time of 6 to 8 minutes, and 2h flexural strength of 8.50MPa) And polyethylene wax micropowder (polyethylene wax micropowder PE) is sieved into particle size scope and is 1 μm~30 μm, 30 μm~50 μm, 50 μm~70 μm three parts, get three parts mass percent content and be respectively 8%, 65%, 27% as The required α-type calcium sulfate hemihydrate gypsum powder and polyethylene wax micropowder required by the present embodiment.

[0054] Add the above-mentioned α-type calcium sulfate hemihydrate gypsum powder and polyethylene wax micropowder into the grinder and mix for 10 minutes, then add water-soluble starch (water-soluble starch produced b...

Embodiment 3

[0056] A composite powder for three-dimensional rapid prototyping, consisting of the following raw materials in mass percentage:

[0057]

[0058] During preparation, firstly mix α-type calcium sulfate hemihydrate gypsum powder (commercially available high-strength gypsum powder with whiteness of 92%, standard thickness of 28%, initial setting time of 6 to 8 minutes, and 2h flexural strength of 8.50MPa) And copolyamide hot-melt adhesive powder (copolyamide hot-melt adhesive powder PA-D180) is sieved into three parts with particle sizes ranging from 1 μm to 30 μm, 30 μm to 50 μm, and 50 μm to 70 μm, and the mass percentages of the three parts are respectively 5%, 60%, 35% are α-type calcium sulfate hemihydrate gypsum powder and copolyamide hot-melt adhesive powder required by the present embodiment.

[0059] After adding the above-mentioned α-type calcium sulfate hemihydrate gypsum powder and copolyamide hot-melt adhesive powder into the grinder and mixing for 30min, add pol...

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Abstract

The invention belongs to the technical field of rapid-molding materials, and discloses a rapid-molding powder material for three-dimensional printing as well as a preparation method and application thereof. The rapid-molding powder material is prepared by mixing and drying the following components by mass percent: 50% to 70% of molding powder A, 10% to 30% of molding powder B, 5% to 10% of water-soluble bonder powder, 1% to 10% of enhancer and 0.5% and 2% of aiding agent, wherein the molding powder A is of alpha-type calcium sulfate hemihydrate gypsum powder; the molding powder B is at least one powder of thermoplastic resin powder, wax powder or hot melt adhesive powder. The obtained rapid-molding powder material can be used for preparing three-dimensional printing prototypes, rapid-molding moulds, medical moulds and the like, and has the advantages of high strength and accuracy, small dimensional deviation, good water resistance and difficult powder bonding.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping materials, and in particular relates to a rapid prototyping powder material for three-dimensional printing and its preparation method and application. Background technique [0002] Three-dimensional printing rapid prototyping technology (three dimensional printing, 3DP) is a technology based on droplet jetting developed by the Massachusetts Institute of Technology in the late 1980s. Its working principle is as follows: the powder spreading roller moves from left to right, and evenly spreads the powder in the powder supply cylinder on the forming cylinder, and then the printing head sprays the bonding liquid according to the shape of the model data section designed by the computer, and the powder is bonded. , after this process is completed, the forming cylinder platform moves down a certain distance, repeats the powder spreading process, sprays the adhesive liquid to print the second lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/28
Inventor 周亮徐梦漪周东卫叶孝兆
Owner GUANGDONG IND TECHN COLLEGE
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