DEVICE AND METHOD FOR HIGH-EFFICIENCY PREPARATION OF SPHERICAL METAL POWDER FOR 3D PRINTING EMPLOYING SEPARATION INTO FIBERS

WIPO Patent Application WO/2020/063624

A1

Disclosed are a device and a method for high-efficiency preparation of a spherical metal powder (10) for 3D printing employing separation into fibers. The device comprises a housing (16), a crucible (1) and a powder collecting region disposed in the housing (16), and a rotating disc (7) having an embedded structure and disposed in the powder collecting region. A material having a poor thermal conductivity is selected to form a main portion of the rotating disc (7), and a metal material having a wetting angle of less than 90º with respect to a liquid drop (6) is selected and embedded into the main portion to serve as an atomizing surface (22) of the rotating disc (7), with a vent hole (23) being disposed in the rotating disc (7). The method for preparing a spherical metal powder (10) for 3D printing combines a technique of preparing microparticles by breaking the flow of a capillary jet (14) by means of an electromagnetic force with a technique of centrifugal atomization, which represents a breakthrough with regard to a traditional mode of metal splitting, such that molten metal is separated in a fibrous manner. Thus, the method allows the preparation of spherical metal powder (10) for 3D printing having a narrow particle size distribution, high sphericity, good fluidity, excellent spreadability, a uniform and controllable size, and no satellite drops, and being suitable for industrial production.

JPH08209207	PRODUCTION OF METAL POWDER
JP2015214742	MULTICRYSTAL METAL PARTICLE AND CONDUCTIVE PASTE
JPH0397806	MANUFACTURE OF REINFORCED METAL POWDER MATERIAL

WANG XIAOMING (CN)
ZHU SHENG (CN)
ZHAO YANG (CN)
WANG SIJIE (CN)
HAN GUOFENG (CN)
SHI JING (CN)
CHANG QING (CN)
REN ZHIQIANG (CN)
TENG TAO (CN)
SUN YU (CN)
DONG WEI (CN)
MENG YAO (CN)
WANG YANYANG (CN)
XU FUMIN (CN)
BAI ZHAOFENG (CN)
HAN YANG (CN)
LI GUOBIN (CN)

PCT/CN2019/107702

April 02, 2020

September 25, 2019

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UNIV DALIAN TECH (CN)
WANG XIAOMING (CN)
ZHU SHENG (CN)
ZHAO YANG (CN)
WANG SIJIE (CN)
HAN GUOFENG (CN)
SHI JING (CN)
CHANG QING (CN)
REN ZHIQIANG (CN)
TENG TAO (CN)
SUN YU (CN)

B22F9/10

CN109047786A	2018-12-21
CN104588673A	2015-05-06
JP2009062573A	2009-03-26
CN107350477A	2017-11-17
US4323523A	1982-04-06
CN107775009A	2018-03-09
CN1559696A	2005-01-05

DALIAN EAST PATENT AGENT LTD. (CN)

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