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Bulk powder for 3D printing, preparation method thereof and printing method

A 3D printing and lump-like technology, applied in the field of 3D printing, can solve the problems of limited promotion, poor fluidity, uniform coating, etc., and achieve the effect of low price, increased fluidity and stability

Active Publication Date: 2019-04-30
中圣德投资(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two methods combine powder injection molding and 3D printing technology, their feeding mode is powdery or irregular, which mainly has the following disadvantages: the particles are irregular, so the fluidity is not good, and the bonding Excessive addition of additives (up to 8-12wt%)
When the laser beam is used to melt the binder and integrate it with the lower layer, due to the irregular shape of the powder or granular feed, it cannot be effectively uniformly coated, and it is easy to cause uneven thickness on the surface of the product and excessive bulk density. Low, large variation in sintering shrinkage; at the same time, special debinding process and equipment support are required due to excessive binder
[0007] In the existing technology, high-power laser equipment is used as a method of manufacturing metal parts by 3D printing technology. Because of the high power of 2000W to 10000W, the equipment cost is expensive, the operation safety is high, the maintenance cost of equipment is high, and the unit price of metal raw powder is expensive. Therefore, its promotion is limited

Method used

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  • Bulk powder for 3D printing, preparation method thereof and printing method
  • Bulk powder for 3D printing, preparation method thereof and printing method
  • Bulk powder for 3D printing, preparation method thereof and printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] The agglomerate powder for 3D printing in this embodiment is in the shape of a sphere after spray granulation, the particle size distribution D90 of 316 metal powder is 22-25 μm, and the particle size distribution of the powder agglomerate is formed after the spray granulation process Its particle size distribution D90 is 80~120μm. The main role of the alcohol solvent here is as a carrier, which is responsible for combining the metal powder and the binder.

[0081] By weight percentage, each component content is as follows:

[0082]

[0083] The D90 is 80-120 μm powder group formed by spray-drying the dried granules, the powder accounts for 95%, and the binder accounts for 5%.

[0084] After 3D printing and forming the green body, the traditional 316L sintering curve is kept at 1360°C for 3 hours, and the sintered density can be obtained at 7.85g / cm 3 (99% relative density) product.

Embodiment 2

[0086] The agglomerate powder for 3D printing in this embodiment is in the shape of a sphere after spray granulation, the particle size distribution D90 of 316 metal powder is 22-25 μm, and the particle size distribution of the powder agglomerate is formed after the spray granulation process Its particle size distribution D90 is 80~120μm. The main role of the alcohol solvent here is as a carrier, which is responsible for combining the metal powder and the binder.

[0087] By weight percentage, each component content is as follows:

[0088]

[0089] D90 80~120μm powder is formed after spray drying, the powder accounts for 90%, and the binder accounts for 10%.

[0090] After 3D printing and forming the green body, the traditional 316L sintering curve is kept at 1360°C for 3 hours, and the sintered density can be obtained at 7.85g / cm 3 (relative density 99%) product.

Embodiment 3

[0092] A kind of agglomerate powder for 3D printing of the present embodiment, it is spherical shape after spray granulation, yttrium stabilized zirconia (3Y-ZrO 2 ) The particle size distribution D90 of the powder is 0.3-0.5 μm, and the particle size distribution of the powder cluster formed after the spray granulation process has a particle size distribution D90 of 80-120 μm. The main role of the ultrapure water solvent is as a carrier, which is responsible for stabilizing yttrium zirconia (3Y-ZrO 2 ) The powder is combined with the binder.

[0093] By weight percentage, each component content is as follows:

[0094]

[0095] D90 80~120μm powder is formed after spraying and drying, the powder accounts for 92.5%, and the binder accounts for 7.5%.

[0096] After 3D printing, the green body is made of traditional yttrium stabilized zirconia (3Y-ZrO 2 ) after sintering curve at 1450℃ for 3 hours, the sintered density can be obtained as 6.01g / cm 3 (relative density 99%) pr...

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Abstract

The invention provides bulk powder for 3D printing, a preparation method thereof and a printing method. The bulk powder for 3D printing is bulk particles, and the bulk particles are prepared from thefollowing components in percentage by weight: 90-98% of a powder body and 2-10% of a binder, wherein particle size distribution D90 of the powder body is 0.3-35 [mu]m. According to the bulk powder for3D printing, the solid content of the powder is significantly increased, the relative density after sintering can reach 97% or above, particle size distribution D90 of the bulk particles is 50-200 [mu]m, particle size distribution of the adopted powder body is small, the product sintering density is advantageously increased, mechanical properties are advantageously enhanced, the prepared bulk powder for 3D printing is high in sintering density and small in using amount of the binder, and the preparation process is simplified. According to the 3D printing method, energy consumption is reduced,printing is quick, safety is high, the production cost is lowered, and the 3D printing method can be widely used for 3D printing.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a lump powder for 3D printing, a preparation method and a printing method thereof. Background technique [0002] 3D printing technology, also known as three-dimensional printing technology, is a technology based on digital model files, using powder or plastic and other bondable materials to construct objects by layer-by-layer printing. It can directly generate parts of any shape from computer graphics data without machining or any molds, thereby greatly shortening the product development cycle, improving productivity and reducing production costs. Products such as lampshades, body parts, jewelry, football boots customized to the shape of players' feet, racing car parts, solid-state batteries, and customized mobile phones and violins can all be manufactured using this technology. [0003] 3D printing technology is actually a general term for a series of rapid prototyping tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10B22F1/00B22F3/105B22F3/22B33Y10/00B33Y70/00B28B1/00
CPCB22F3/225B22F9/10B28B1/001B33Y10/00B33Y70/00B22F10/00B22F1/107B22F10/36B22F10/66B22F10/16Y02P10/25
Inventor 侯春树
Owner 中圣德投资(深圳)有限公司
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