3D printing method of zirconium dioxide powder material, 3D printing device with binder injection device and binder injection device used for 3D printing method of zirconium dioxide powder material

A zirconium dioxide, 3D printing technology, applied in ceramic molding machines, manufacturing tools, additive processing, etc., can solve the problems of low density, low precision and density, and large shrinkage rate of the bonded green body. Improve production efficiency, achieve real-time control, and avoid particle settling effects

Inactive Publication Date: 2016-08-24
GUANGDONG JANUS SMART GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process also has some problems, mainly because the loose powder is bonded together by a binder, and the bonded green body itself has low density, loose structure and low strength.
This will lead to a large shrinkage rate during the sintering process of the green body, and the precision and density are not high

Method used

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  • 3D printing method of zirconium dioxide powder material, 3D printing device with binder injection device and binder injection device used for 3D printing method of zirconium dioxide powder material

Examples

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specific Embodiment

[0039] According to a specific embodiment of the present invention, a 3D printing method of zirconia powder comprises the following steps:

[0040] 1. Slice and layer the 3D model of the part to be printed to form multi-layer outline information.

[0041]2. Lay a layer of zirconia powder, and use the nozzle to move and spray the binder liquid containing zirconium hydroxide nanoparticles according to the set program to bond the zirconia powder to form the outline of a layer of components. Zirconium hydroxide nanoparticles are obtained by reacting zirconium salt aqueous solution with ammonia water, and the cost is relatively low. Wherein the particle size of the zirconium hydroxide nanoparticles is in the range of 10-500 nanometers, and the weight proportion of the zirconium hydroxide nanoparticles in the binder is not less than 10%.

[0042] 3. Lay a new layer of zirconia powder on the basis of the formed outline, and then spray the binder, and superimpose layer by layer in th...

example

[0052] 3D printing of zirconia samples. Zirconium dioxide samples were prepared by using a binder containing zirconium hydroxide nanoparticles and a conventional binder without nanoparticles. The size of the sample is 10 mm x 5 mm x 2 mm.

[0053] The binder used in the micro-spray molding is: polyvinylpyrrolidone (PVP) aqueous solution, PVP type K30, with a mass fraction of 8%. The composition of the binder containing the zirconium hydroxide nanoparticles is the same as that of the above-mentioned binder, and the mass fraction of the zirconium hydroxide nanoparticles is 15%. The zirconium hydroxide nanoparticles are reacted with zirconium oxychloride and ammonia water, washed with pure water, filtered and added to the binder, and the diameter of the particles is in the range of 50-320 nanometers.

[0054] The molding powder is spherical zirconia, and the particle size D50 is 32 microns.

[0055] Micro-injection molding parameters: the layer thickness is set to 0.1 mm, the ...

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Abstract

The invention discloses a 3D printing method of zirconium dioxide powder material. The method comprises the following steps: (1) slicing up and stratifying the 3D model of the product which needs to be printed to form multi-layered profile information; (2) paving a layer of zirconium dioxide powder material, movably injecting binder liquid with zirconium hydroxide nano-particles according to set procedure by an injection nozzle, and then bonding the zirconium dioxide powder material to form a profile of a layer of a part; (3) injecting binder after paving another layer of zirconium dioxide powder material on the formed profile, and then according to the above mentioned method, superimposing profiles layer by layer to form a 3D green body; (4) degreasing and sintering the green body and then conducting surface treatment to obtain a finished product. The invention further discloses a binder injection device used for the 3D printing method and a 3D printing device with the binder injection device. The invention is beneficial to obtain a 3D printed product which is high in density and reduce cost.

Description

technical field [0001] The invention relates to a 3D printing method, equipment and binder spraying device of zirconia powder. Background technique [0002] Zirconium dioxide is an important ceramic material with properties such as high resistivity, high melting point, high refractive index and low thermal expansion coefficient. It has been widely used as high temperature resistant materials and ceramic insulating materials. Ceramic materials such as zirconia can also be shaped by 3D printing technology, which can be used to make products with complex structures and small batch requirements. At present, the technology capable of 3D printing of ceramic materials is mainly the spray bonding technology of ceramic powder. It mainly uses the nozzle to spray the binder to bond and superimpose the ceramic powder layer by layer to form a three-dimensional bonded green body, and then degrease, sinter and surface treatment to obtain the final ceramic product. However, this process a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00C04B35/48C04B35/634B33Y10/00B33Y30/00B33Y70/00
CPCB28B1/001C04B35/48C04B35/63404C04B2235/6026
Inventor 闫国栋王长明
Owner GUANGDONG JANUS SMART GRP CO LTD
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