3d printing method

Patent metadata

Field	Value
Publication number	US-2019160531-A1
Application number	US-201716089164-A
Country	US
Kind code	A1
Filing date	Apr 3, 2017
Priority date	Apr 1, 2016
Publication date	May 30, 2019
Grant date	—

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

1 . A 3D printing method comprising a step of applying an electromagnetic field to a three-dimensional shape molded by using a metal powder containing a conductive metal having a relative magnetic permeability of 90 or more or a slurry containing the metal powder.

2 . The 3D printing method according to claim 1 , comprising steps of molding the metal powder or slurry in the electromagnetic field to the three-dimensional shape; molding the metal powder or slurry so as to have the three-dimensional shape after passing through the electromagnetic field or molding the metal powder or slurry to the three-dimensional shape and then applying the electric field thereto.

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

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

5 . The 3D printing method according to claim 1 , wherein the metal powder or slurry comprises the conductive metal in an amount of 30 wt % or more based on the weight.

6 . 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.

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

8 . The 3D printing method according to claim 1 , wherein the slurry comprises the metal powder and a binder.

9 . The 3D printing method according to claim 8 , wherein the binder is alkyl cellulose, polyalkylene oxide, polyalkylene carbonate, polyvinyl alcohol or lignin.

10 . The 3D printing method according to claim 8 , wherein the slurry comprises 5 to 200 parts by weight of the binder relative to 100 parts by weight of the metal powder.

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

12 . 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.

Assignees

• Lg Chemical Ltd

Inventors

• Yoo Dong Woo
• Lee Jin Kyu

Classifications

• B22F2003/1053

  by induction · CPC title

• B22F2304/10

  Micron size particles, i.e. above 1 micrometer up to 500 micrometer · CPC title

• B29C64/10 Primary

  Processes of additive manufacturing · CPC title

• B22F3/105

  by using electric current {other than for infrared radiant energy}, laser radiation or plasma (B22F3/11 takes precedence){; by ultrasonic bonding (B22F3/115 takes precedence)} · CPC title

• B22F2304/056

  Particle size above 100 nm up to 300 nm · CPC title