DEVICE AND METHOD FOR PREPARING SPHERICAL METAL POWDER FOR 3D PRINTING

WIPO Patent Application WO/2020/063622

A1

Disclosed are a device and method for preparing a spherical metal powder for 3D printing. The device comprises: a shell (19), a crucible (5) arranged inside the shell (19), and a collection bin (13) arranged at a lower part of the shell (19), wherein a rotary plate (11) arranged in a powder collection area has an embedded structure, a material with a poor thermal conductivity is selected to be a base body part of the rotary plate (11), a metal material, a wetting angle with droplets, being less than 90 degrees, is embedded into a main body part to serve as an atomization plane (30) of the rotary plate (11), and a vent hole (31) is provided in the rotary plate (11). In the preparation method, a pulse microporous injection method and a centrifugal atomization method are mainly combined, the structure of the rotary plate is matched, and induction heating is carried out on a surface of the rotary plate, so that metal liquid breaks through a traditional fission mode of molten metal and realizes a fibrous fission mode, which can be realized only when an atomization medium is a water solution or an organic solution, thereby preparing a high-melting-point metal powder having a fine granularity, controllable particle sizes, high sphericity, no satellite droplets, and good fluidity and spreadability, and being suitable for industrial production.

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)
WANG YANYANG (CN)
MENG YAO (CN)
XU FUMIN (CN)
BAI ZHAOFENG (CN)
HAN YANG (CN)
LI GUOBIN (CN)

PCT/CN2019/107700

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

CN109093127A	2018-12-28
CN109014226A	2018-12-18
CN104550990A	2015-04-29
JP2009062573A	2009-03-26
CN107350477A	2017-11-17
US4323523A	1982-04-06
KR20020009668A	2002-02-02

LIU, YUNZHONG ET AL.: "Melt Film Formation and Disintegration during Novel Atomization Process", TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, vol. 17, no. 6, 31 December 2007 (2007-12-31), XP022935705, ISSN: 1003-6326, DOI: 20191203110559A

DALIAN EAST PATENT AGENT LTD. (CN)

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