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Ink-jet 3D printing material, ink and preparation method thereof

A 3D printing and inkjet technology, applied in ink, additive processing, household appliances, etc., can solve the problems of easy agglomeration of binder powder, collapse of porous structure, inability to print large parts, etc., and achieve good fluidity and dispersion , a high degree of industrialization, and the effect of a good market foundation

Pending Publication Date: 2020-12-08
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the first method, due to the small amount of ink in the nozzle and the low solubility of the binder, the ratio of the binder to the metal powder will be too small, the green strength will be low, and large parts cannot be printed.
The green embryo prepared by the second method has high strength and can quickly print large parts, but because the binder powder is easy to agglomerate, the dispersion of the binder powder in the metal powder is uneven, and it is easy to Cause metal parts to deform, collapse and produce porous structures, etc., affecting the accuracy and strength of the final parts
The current metal coating methods are all developed for selective laser sintering, and there is no metal coating powder specifically for the inkjet 3D printing process.

Method used

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  • Ink-jet 3D printing material, ink and preparation method thereof
  • Ink-jet 3D printing material, ink and preparation method thereof
  • Ink-jet 3D printing material, ink and preparation method thereof

Examples

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preparation example Construction

[0022] An aspect of the embodiments of the present invention provides a method for preparing an inkjet 3D printing material, which includes:

[0023] providing a homogeneous dispersion comprising particulate material, binder and solvent; and,

[0024] A binder precipitation agent is added to the uniform dispersion liquid, so that the binder in it is slowly precipitated and coated on the surface of the granular material, forming a coated granular material with a core-shell structure.

[0025] In some preferred embodiments, the preparation method includes: dissolving the binder in a solvent to form a binder solution, and then uniformly dispersing the granular material in the binder solution to form the uniform dispersion liquid.

[0026] In some preferred embodiments, the granular material is required to be a powder with a mesh size of 100 or more, and the powder is a spherical or nearly spherical powder prepared by gas atomization or other processes. The present invention has...

Embodiment 1

[0057] (1) Take 20g of water-soluble starch and 500mL of water, pour into the reactor and stir evenly until completely dissolved;

[0058] (2) Take 1000g of 316L stainless steel powder (022Cr 17 Ni 12 Mo 2 ), the powder is aerosolized spherical powder. Add the stainless steel powder into the water-soluble starch solution, and stir quickly to make the stainless steel powder evenly disperse up and down in the solution;

[0059] (3) Slowly add 1000mL of ethanol into the stirring dispersion, and it can be observed that white water-soluble starch precipitates and is quickly wrapped on the stainless steel powder. With the gradual addition of ethanol, it can be observed that the stainless steel powder with a certain viscous coating adheres to each other Precipitated in gel form. Gradually reduce the stirring speed, pour out the mixed solution of the solvent and the precipitation agent in the reaction kettle, and the poured out solution can be distilled under reduced pressure to r...

Embodiment 2

[0065] (1) Take 24g of polyethylene glycol-8000 (PEG-8000) and 500ml of water, pour into the reactor and stir evenly until completely dissolved;

[0066] (2) Take 80 g of polyurethane (TPU) powder with a particle size distribution of 50 μm˜100 μm. Add the polyurethane powder into the PEG-8000 aqueous solution, and stir quickly to make the polyurethane powder evenly disperse up and down in the solution;

[0067] (3) Slowly add 1000mL of ethanol to the stirring dispersion, and it can be observed that white PEG-8000 precipitates and is quickly wrapped on the polyurethane powder. With the gradual addition of ethanol, it can be observed that the polyurethane powder with a certain viscous coating sticks to each other Precipitated in gel form. Gradually reduce the stirring speed, pour out the mixed solution of the solvent and the precipitation agent in the reaction kettle, and the poured out solution can be distilled under reduced pressure to recover ethanol;

[0068] (4) the film-...

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Abstract

The invention discloses an ink-jet 3D printing material, ink and a preparation method thereof. The preparation method of the ink-jet 3D printing material comprises the following steps: providing a uniform dispersion liquid containing a granular material, a binder and a solvent; and adding a binder precipitating agent into the uniform dispersion liquid, slowly precipitating the binder in the uniform dispersion liquid, and coating the binder on the surface of the granular material to form the coated granular material with a core-shell structure. The ink-jet 3D printing material has a core-shellstructure and comprises a granular material and an adhesive coating layer uniformly coating the surface of the granular material. The method has the advantages of being simple in process, low in energy consumption and capable of achieving large-scale preparation; the prepared ink-jet 3D printing material has the advantages of being high in sphericity degree, good in fluidity and dispersity, uniform in binder coating and the like, and high precision and strength of a green body can be guaranteed in the ink-jet 3D printing process.

Description

technical field [0001] The present invention relates to a preparation method of an inkjet 3D printing material, in particular to a metal coating material for inkjet 3D printing and a preparation method thereof, especially suitable for the metal inkjet 3D printing (binder jetting) process, As well as the matching ink and its preparation method, it belongs to the technical field of material preparation in advanced rapid manufacturing. Background technique [0002] Additive manufacturing technology has ushered in great development in recent years, especially in the field of metal additive manufacturing. It is widely used in aerospace, mold making, and automobile manufacturing. Compared with traditional subtractive manufacturing, this layer-by-layer manufacturing method has great advantages in the field of complex manufacturing, and there is almost no material waste. [0003] A major category of additive manufacturing is inkjet 3D printing (3DP), also known as binder jetting, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/30B33Y70/00B33Y70/10
CPCC09D11/30B33Y70/00
Inventor 郭浩钱波王瑞汤阳李令英谢永林
Owner SHANGHAI UNIV
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