EP3753655A1 - Dispositif d'atomisation - Google Patents

Dispositif d'atomisation Download PDF

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Publication number
EP3753655A1
EP3753655A1 EP19382517.1A EP19382517A EP3753655A1 EP 3753655 A1 EP3753655 A1 EP 3753655A1 EP 19382517 A EP19382517 A EP 19382517A EP 3753655 A1 EP3753655 A1 EP 3753655A1
Authority
EP
European Patent Office
Prior art keywords
spinning disc
atomization device
disc
rotating shaft
spinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19382517.1A
Other languages
German (de)
English (en)
Inventor
Jordi PIJUAN CASES
Marc GRANÉ VILASECA
Ricardo HERNÁNDEZ ROSSI
María Dolores RIERA COLOM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universitat Politecnica de Catalunya UPC
Fundacio Eurecat
Original Assignee
Universitat Politecnica de Catalunya UPC
Fundacio Eurecat
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universitat Politecnica de Catalunya UPC, Fundacio Eurecat filed Critical Universitat Politecnica de Catalunya UPC
Priority to EP19382517.1A priority Critical patent/EP3753655A1/fr
Priority to US17/620,447 priority patent/US20220347747A1/en
Priority to EP20732240.5A priority patent/EP3986649A1/fr
Priority to PCT/EP2020/066703 priority patent/WO2020254365A1/fr
Priority to CA3140687A priority patent/CA3140687A1/fr
Priority to AU2020294884A priority patent/AU2020294884A1/en
Publication of EP3753655A1 publication Critical patent/EP3753655A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force

Definitions

  • the present invention relates to a metal powder atomization device, particularly to a centrifugal atomization device in which molten metal is dispersed in the form of particles due to centrifugal force upon contact with a spinning disc.
  • Atomization is a process of breaking up a bulk liquid into small droplets. Any material existing in liquid state can be atomized into micrometer-sized particles. This technique is used to produce elemental metal powder or alloys.
  • Metal powder has a number of industrial applications, among which conventional powder metallurgy for the manufacture of parts by compaction and powder sintering, the formation of coatings by means of spray techniques, or the manufacture of components by means of additive manufacturing techniques stand out.
  • Centrifugal atomization using a spinning disc is based on dropping a column of liquid against a disc, which can be flat or cup-shaped, among other shapes.
  • a spinning disc which can be flat or cup-shaped, among other shapes.
  • the liquid spreads out over the surface of the disc due to the centrifugal force to which it is subjected.
  • the metal reaches the edge of the disc, the surface tension is insufficient to maintain the bulk liquid mass and accordingly turns into a spray of small droplets which solidify and form a powder.
  • the liquid will be broken up into ligaments or sheets, or directly into droplets. Regardless of how the liquid is broken up, if the process is suitable, most of the particles end up being spherical.
  • the spinning disc atomization (SDA) device comprises three basic groups:
  • a cooling system is needed for the atomizing disc, so that it can work at temperatures such that it maintains the suitable mechanical strength and toughness properties.
  • an objective of the present invention is to provide an atomization device in which the rotating shaft of the motor is perfectly aligned with the spinning disc, thereby avoiding the use of mechanical transmission elements, such as gears, belts, or other elements such as elastic couplings for connecting shafts, which complicate the design and increase the number of rotating elements.
  • the simplicity of the design minimizes vibrations in the atomizing disc.
  • the atomization device of the invention solves the mentioned drawbacks and presents other advantages that will be described below.
  • the atomization device comprises a motor rotatably driving a spinning disc by means of a rotating shaft, and cooling means for cooling said spinning disc, wherein said cooling means comprise a cooling circuit extending around at least one portion of the rotating shaft and below at least one portion of said spinning disc.
  • the cooling circuit is not located in the actual rotating shaft, it is possible for the drive system of the disc to be simpler, enabling perfect alignment of the rotating shaft of the motor with the spinning disc. This minimizes rotating moving parts, which prevents vibrations from being produced.
  • said cooling circuit is located in a stationary base in turn acting as a collector for the cooling circuit, comprising at least one inlet and one outlet for liquid coolant.
  • These inlets and outlets for liquid coolant into the lower area of the disc are located around, on the sides, and parallel to the shaft of the atomizing disc. They are characterized by being able to be distributed in various positions and with various shapes and section around the area of the shaft of the disc.
  • the atomization device according to the present invention also advantageously comprises at least one gasket with its corresponding closure system should one be required, arranged between the spinning disc and the stationary base. Said gasket maintains tightness and confines the liquid coolant.
  • This gasket can be made of graphite, for example.
  • said at least one gasket is arranged in a stationary manner, i.e., it does not spin with the spinning disc, as are the closure elements keeping the gasket in contact with the disc, such that only the shaft and disc part is rotating.
  • said spinning disc and said rotating shaft consist of a single part, which also minimizes unwanted misalignments and vibrations in the assembly.
  • the spinning disc is made of metal, with or without a refractory, anti-corrosion and/or anti-wear coating on its outer surface, although it can also be made of a ceramic material that adapts to the required mechanical conditions.
  • the spinning disc has a diameter comprised between 20 and 200 mm and a thickness comprised between 1 and 15 mm.
  • the atomization device comprises a motor 1 rotatably driving a spinning disc 2 through a rotating shaft 3.
  • Said spinning disc 2 and said rotating shaft 3 may or may not consist of a single part.
  • atomization takes place by dropping a column or droplets of liquid against the spinning disc 2, which may be flat, cup-shaped, or have other shapes or geometries.
  • this spinning disc 2 requires cooling which is provided, according to the present invention, by means of a cooling circuit, generally indicated by means of reference number 4, which is not arranged inside the rotating shaft 3, but rather extends around at least one portion of the rotating shaft 3 and below at least one portion of said spinning disc 2.
  • this cooling circuit 4 comprises at least one inlet 5 for liquid coolant, for example, water or oil, and at least one outlet 6 for said liquid coolant.
  • the atomization device comprises at least one, and preferably two, friction bearings 15 arranged between the rotating shaft 3 and the stationary base 7.
  • the cooling circuit 4 comprises at least one vertical inlet segment 10 and at least one vertical outlet segment 11 for the liquid coolant which are parallel to and spaced apart from the rotating shaft of the disc, which allows cooling specifically the upper portion of the rotating shaft 3 and the lower portion of the spinning disc 2.
  • the atomization device comprises a sealing gasket 13, with its corresponding closure system should it be required, arranged between the stationary base 7 and the spinning disc 2, where said gasket 13 may preferably be made of graphite, though it could be made of any suitable material.
  • Said gasket 13 with its corresponding closure system should one be required, is stationary, arranged between the spinning disc 2 and the stationary base 7. Said gasket maintains tightness and confines the liquid coolant.
  • a sealing gasket 12 is also arranged between the rotating shaft 3 and the stationary base 7 for the purpose of confining the liquid coolant in the lower portion of the disc 2.
  • This gasket 12 will preferably be made of an elastomeric material, though it may be made of any type of material that assures tightness in said area, such as graphite for example.
  • the spinning disc 2 can be made of any suitable material, but it is preferably made of metal or ceramic, with or without a refractory, anti-corrosion and/or anti-wear coating on its outer surface
  • the spinning disc 2 may be made of AISI H13 steel, which is suitable for hot working.
  • a suitable refractory coating could be made of alumina or zirconia to avoid interaction between the metal of the disc and the atomized metal.
  • the diameter of the spinning disc 2 can range from 20 to 200 mm and the thickness can range from 1 to 15 mm.
  • the table below includes several atomization embodiments obtained by means of the atomization device according to the present invention: Material atomized Speed of the spinning disc (rpm) Mean particle diameter ( ⁇ m) Temperature of the molten metal (°C) Tin 30,000 90 400°C 40,000 75 Aluminum 20,000 190 750°C 30,000 140 Copper 15,000 180 1100°C 20,000 150

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Nozzles (AREA)
  • Glanulating (AREA)
EP19382517.1A 2019-06-20 2019-06-20 Dispositif d'atomisation Withdrawn EP3753655A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19382517.1A EP3753655A1 (fr) 2019-06-20 2019-06-20 Dispositif d'atomisation
US17/620,447 US20220347747A1 (en) 2019-06-20 2020-06-17 Atomization device
EP20732240.5A EP3986649A1 (fr) 2019-06-20 2020-06-17 Dispositif d'atomisation
PCT/EP2020/066703 WO2020254365A1 (fr) 2019-06-20 2020-06-17 Dispositif d'atomisation
CA3140687A CA3140687A1 (fr) 2019-06-20 2020-06-17 Dispositif d'atomisation
AU2020294884A AU2020294884A1 (en) 2019-06-20 2020-06-17 Atomization device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19382517.1A EP3753655A1 (fr) 2019-06-20 2019-06-20 Dispositif d'atomisation

Publications (1)

Publication Number Publication Date
EP3753655A1 true EP3753655A1 (fr) 2020-12-23

Family

ID=67437442

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19382517.1A Withdrawn EP3753655A1 (fr) 2019-06-20 2019-06-20 Dispositif d'atomisation
EP20732240.5A Pending EP3986649A1 (fr) 2019-06-20 2020-06-17 Dispositif d'atomisation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20732240.5A Pending EP3986649A1 (fr) 2019-06-20 2020-06-17 Dispositif d'atomisation

Country Status (5)

Country Link
US (1) US20220347747A1 (fr)
EP (2) EP3753655A1 (fr)
AU (1) AU2020294884A1 (fr)
CA (1) CA3140687A1 (fr)
WO (1) WO2020254365A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023117660A1 (fr) * 2021-12-20 2023-06-29 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Coburg Ensemble et procédé pour l'atomisation d'une masse fondue de métal et procédé pour la production d'un ensemble

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE279657C (fr) *
WO1988007979A1 (fr) * 1987-04-10 1988-10-20 Battelle Development Corporation Extraction de ceramiques par fusion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1517283A (en) * 1974-06-28 1978-07-12 Singer Alec Production of metal articles
US4178335A (en) * 1977-12-21 1979-12-11 United Technologies Corporation Method of producing solid particles of metal
LU91086B1 (en) * 2004-06-25 2005-12-27 Sms Demag Ag Continous casting mould wit oscillation device.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE279657C (fr) *
WO1988007979A1 (fr) * 1987-04-10 1988-10-20 Battelle Development Corporation Extraction de ceramiques par fusion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OZTURK S ET AL: "EFFECT OF PRODUCTION PARAMETERS ON COOLING RATES OF AA2014 ALLOY POWDERS PRODUCED BY WATER JET COOLED, ROTATING DISC ATOMISATION", POWDER METALLURGY, MANEY PUBLISHING, LONDON, GB, vol. 46, no. 4, 1 December 2003 (2003-12-01), pages 342 - 348, XP001244906, ISSN: 0032-5899, DOI: 10.1179/003258903225008599 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023117660A1 (fr) * 2021-12-20 2023-06-29 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Coburg Ensemble et procédé pour l'atomisation d'une masse fondue de métal et procédé pour la production d'un ensemble

Also Published As

Publication number Publication date
AU2020294884A1 (en) 2022-01-27
EP3986649A1 (fr) 2022-04-27
WO2020254365A1 (fr) 2020-12-24
US20220347747A1 (en) 2022-11-03
CA3140687A1 (fr) 2020-12-24

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