3D printing method

Patent metadata

Field	Value
Publication number	US-11577315-B2
Application number	US-201716089164-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Apr 1, 2016
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

The present application provides a 3D printing method. The present application can provide as a method for efficiently performing 3D printing, for example, a 3D printing method capable of more rapidly and efficiently producing a three-dimensional shape precisely realized up to a fine portion.

First claim

The invention claimed is:

1. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry, and
applying an electromagnetic field to the three-dimensional shape comprising the slurry,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the electromagnetic field is formed by applying a current in a range of 100 A to 1,000 A,
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.

2. The 3D printing method according to claim 1 , wherein the conductive metal has a conductivity of 8 MS/m or more at 20° C.

3. The 3D printing method according to claim 1 , wherein the conductive metal is nickel, iron or cobalt.

4. The 3D printing method according to claim 1 , wherein the metal powder comprises the conductive metal in an amount of 35 weight % or more based on the total weight of the metal powder.

5. The 3D printing method according to claim 1 , wherein the metal powder has a particle diameter of 50% particle size distribution in a range of 100 nm to 100 μm.

6. The 3D printing method according to claim 1 , wherein the metal powder is a spherical, flake, ellipsoid, needle or dendritic shape.

7. The 3D printing method according to claim 1 , wherein the binder is alkyl cellulose, polyalkylene oxide, polyalkylene carbonate, polyvinyl alcohol or lignin.

8. The 3D printing method according to claim 1 , wherein the slurry comprises 5 to 190 parts by weight of the binder relative to 100 parts by weight of the metal powder.

9. The 3D printing method according to claim 1 , wherein the electromagnetic field is formed by applying a current at a frequency in a range of 100 kHz to 1,000 kHz.

10. The 3D printing method according to claim 1 , wherein the magnetic permeability of the conductive metal is from 90 to about 300,000, and wherein the amount of the conductive metal is from 30 weight % to less than about 100 weight % relative to 100 parts by weight of the metal powder comprising the conductive metal.

11. The 3D printing method according to claim 1 , wherein the magnetic permeability of the conductive metal is from 95 to about 300,000, wherein the amount of the conductive metal is from 35 weight % to 95 weight % relative to 100 parts by weight of the metal powder comprising the conductive metal.

12. The 3D printing method according to claim 1 , wherein the electromagnetic field is applied to the three-dimensional shape such that the metal powder is melted or sintered under the electromagnetic field.

13. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry while applying an electromagnetic field,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.

14. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry subsequent to applying an electromagnetic field to the slurry,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.

Assignees

• Lg Chemical Ltd

Inventors

• Yoo Dong Woo
• Lee Jin Kyu

Classifications

• B29C64/165 Primary

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title

• B33Y10/00 Primary

  Processes of additive manufacturing · CPC title

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title

• B22F1/10

  Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title