Freemelt AB

Sweden

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Date
2024 January 1
2024 (YTD) 1
2021 2
2020 3
2019 6
IPC Class
B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor 6
B22F 3/105 - Sintering only by using electric current, laser radiation or plasma 5
B33Y 10/00 - Processes of additive manufacturing 5
B23K 15/00 - Electron-beam welding or cutting 3
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting 3
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Found results for  patents

1.

ADDITIVE MANUFACTURING USING A PARTICLE BEAM

      
Application Number EP2023067854
Publication Number 2024/003264
Status In Force
Filing Date 2023-06-29
Publication Date 2024-01-04
Owner FREEMELT AB (Sweden)
Inventor Ackelid, Ulf

Abstract

In accordance with one or more embodiments herein, an additive manufacturing apparatus (100) is provided. The additive manufacturing apparatus (100) comprises a particle beam source (110), a build tank (150), a vacuum chamber (130), arranged to enclose the particle beam all the way from the particle beam source (110) to the build tank (150), one or more vacuum pumps (140), arranged to provide vacuum inside the vacuum chamber (130), and an X-ray shield (120), arranged to enclose at least the particle beam source (110), the vacuum chamber (130), and at least one of the one or more vacuum pumps (140). Further, a method (400) for constructing an additive manufacturing apparatus comprising a particle beam source (110) and a build tank 150 is provided. The method (400) comprises arranging (410) an X-ray shield (120) in an additive manufacturing apparatus (100), to enclose at least the particle beam source (110), a vacuum chamber (130) arranged to enclose the particle beam all the way from the particle beam source (110) to the build tank (150), and at least one vacuum pump (140) arranged to provide vacuum inside the vacuum chamber (130).

IPC Classes  ?

  • B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
  • B22F 12/00 - Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
  • B22F 12/82 - Combination of additive manufacturing apparatus or devices with other processing apparatus or devices
  • B22F 12/90 - Means for process control, e.g. cameras or sensors
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
  • G21F 1/08 - Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
  • G21F 3/00 - Shielding characterised by its physical form, e.g. granules, or shape of the material
  • G21F 7/00 - Shielded cells or rooms

2.

PREHEATING OF POWDER BED

      
Application Number SE2021050352
Publication Number 2021/211049
Status In Force
Filing Date 2021-04-16
Publication Date 2021-10-21
Owner FREEMELT AB (Sweden)
Inventor Ackelid, Ulf

Abstract

In accordance with one or more embodiments herein, an arrangement 200 for additive manufacturing by selective fusion of layers of a three-dimensional product from a powder bed comprising successively formed powder layers 240 is provided. The arrangement 200 comprises a heating element 350 having a powder layer facing surface 355, arranged in a powder layer heating position above a powder layer 240, in such a way that heat radiation emitted from said heating element 350 heats at least a part of the powder layer 240 before the selective fusion of a layer of the three-dimensional product from the powder layer 240.

IPC Classes  ?

  • B29C 64/295 - Heating elements
  • B22F 3/10 - Sintering only
  • B23K 15/00 - Electron-beam welding or cutting
  • B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
  • B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
  • B33Y 10/00 - Processes of additive manufacturing
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor

3.

ELECTRON GUN CATHODE TECHNOLOGY

      
Application Number EP2020076485
Publication Number 2021/058513
Status In Force
Filing Date 2020-09-23
Publication Date 2021-04-01
Owner FREEMELT AB (Sweden)
Inventor
  • Ljungblad, Ulric
  • Stephansen, Robin

Abstract

A metal 3D printer (100), a cathode holder system (112), a carrier (300) for an electron emitter (312), and an electron source piece (114) with a thermal break in a mechanical interface are provided. The metal 3D printer (100) has an electron gun adapted to direct an electron beam (102) generated by a back heated electron emitter (312) of a cathode arrangement (106) onto a metal material via an anode arrangement (110). The back heated electron emitter (312) is capable of emitting electrons via thermionic emission from an emitting surface (314) when heated on a back surface (316), and comprises a side surface (315), essentially perpendicular to the emitting surface (314), between the emitting surface (314) and the back surface (316). The metal 3D printer (100) comprises: an electron source piece (114), comprising the electron emitter (312) attached to a carrier (300) in such a way that the carrier (300) covers the side surface (315) of the electron emitter (312) adjoining the emitting surface (314); a cathode holder system (112) comprising one or more cathode holder system members (120, 126, 130) adapted to hold the electron source piece (114) in a position in relation to an anode arrangement (110); and a first thermal break in a first mechanical interface (310) adapted to mate an emitter holder (120) of the cathode holder system (112) with the electron source piece (114).

IPC Classes  ?

  • H01J 37/075 - Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser
  • H01J 37/065 - Construction of guns or parts thereof
  • H01J 3/02 - Electron guns
  • H01J 37/305 - Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor

4.

ADDITIVE MANUFACTURING METHOD AND APPARATUS WITH BEAM DUMP

      
Application Number EP2020052173
Publication Number 2020/157137
Status In Force
Filing Date 2020-01-29
Publication Date 2020-08-06
Owner FREEMELT AB (Sweden)
Inventor Ljungblad, Ulric

Abstract

The present invention relates to an apparatus and a method for an electron beam system for manufacturing a three-dimensional object by fusing successive layers of powder, said system having at least one lens for reshaping of said electron beam, an electron source and a powder bed, said method comprising the step: blocking a selected cross section of said electron beam for controlling the electron beam power. By interference between the electron beam and a beam blocking part a portion of the electron beam is prevented from reaching the powder bed.

IPC Classes  ?

  • B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
  • B23K 15/00 - Electron-beam welding or cutting
  • B29C 64/273 - Arrangements for irradiation using electron beams [EB] frequency modulated
  • B33Y 10/00 - Processes of additive manufacturing
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
  • B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
  • H01J 37/24 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
  • H01J 37/305 - Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching

5.

SPOT PREHEATING

      
Application Number EP2020052167
Publication Number 2020/157133
Status In Force
Filing Date 2020-01-29
Publication Date 2020-08-06
Owner FREEMELT AB (Sweden)
Inventor Ljungblad, Ulric

Abstract

The present invention relates to a heating method for preparing a powder bed for subsequent processing by irradiating the powder bed with an electron beam from an electron source. The electron source may be designed for fast moving of the electron beam to different heating positions at the powder bed comprising the step, local heating of at least two powder bed heating positions by successive resting of said electron beam at the at least two powder bed heating positions. By jumping between local preheating positions at the powder bed before the powder is fused, charged powder can be prevented from levitation and scattering from the powder bed.

IPC Classes  ?

  • B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
  • B23K 15/00 - Electron-beam welding or cutting
  • B33Y 10/00 - Processes of additive manufacturing
  • B33Y 40/10 - Pre-treatment
  • B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

6.

POWDER COMPARTMENT WITH SELF-SEALING DESIGN

      
Application Number EP2019067798
Publication Number 2020/007891
Status In Force
Filing Date 2019-07-03
Publication Date 2020-01-09
Owner FREEMELT AB (Sweden)
Inventor Ackelid, Ulf

Abstract

The present disclosure relates to 3D printing systems based on powder beds, in which 3D objects are formed by successive consolidation of thin layers of powder (205). Specifically, it relates to a powder compartment from which powder feedstock is distributed in a 3D printer. The powder compartment has at least two wall structures movable in relation to each other, said wall structures being at least partly overlapping in the movable direction, providing a variable volume for enclosing powder. The powder compartment having at least two vertical wall structures (201, 202) movable in relation to each other. The movable wall structures being at least partly overlapping in the movable direction, providing a variable volume for enclosing powder. Contrary to other available designs, this solution does not need a compressible sealing material, for example an elastomer, a textile felt or a braided rope, to prevent powder leakage from the powder compartment. The benefits are a simple and robust design providing more reliable sealing and no risk of contamination of the powder by debris from sealing material.

IPC Classes  ?

  • B29C 64/255 - Enclosures for the building material, e.g. powder containers
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
  • B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
  • B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
  • B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
  • B22F 3/105 - Sintering only by using electric current, laser radiation or plasma

7.

HYBRID AMPLIFIER FOR INDUCTIVE LOAD

      
Application Number EP2019061918
Publication Number 2019/215281
Status In Force
Filing Date 2019-05-09
Publication Date 2019-11-14
Owner FREEMELT AB (Sweden)
Inventor
  • Stephansen, Robin
  • Östman, Fredrik

Abstract

The present invention relates to a circuit arrangement comprising an analogue amplifier electrically connected to a first end of an inductive load. Further at least one electrical switch is electrically connected to a second end of the inductive load, where the electrical switch increases the rate of current change in the inductive load by applying an electrical voltage potential to the second end of the inductive load. The voltage at the second end can also be switched by a digital circuit at the second end for improved performance. The inductive load may e.g. be a beam control coil, which may be provided for controlling an electron beam, e.g. in an electron gun.

IPC Classes  ?

  • H03F 1/56 - Modifications of input or output impedances, not otherwise provided for
  • H05G 1/58 - Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation

8.

BUILD COMPARTMENT WITH SELF-SEALING DESIGN

      
Application Number EP2019060622
Publication Number 2019/207049
Status In Force
Filing Date 2019-04-25
Publication Date 2019-10-31
Owner FREEMELT AB (Sweden)
Inventor Ackelid, Ulf

Abstract

The present invention relates to a build compartment used in 3D printing systems based on powder beds. The build compartment is the volume in a 3D printing apparatus where 3D objects (206) are formed by successive consolidation of thin layers of powder. The build compartment is designed with at least two vertical wall structures (203, 204) movable in relation to each other. The movable wall structures (203, 204) are at least partly overlapping in the movable direction, providing self-sealing for a variable volume for enclosing powder. Contrary to other available designs, this solution does not need a compressible sealing material, for example an elastomer, a textile felt or a braided rope, to prevent powder leakage from the build compartment. The advantages are more reliable sealing and no risk of contamination of the powder by debris from sealing material.

IPC Classes  ?

  • B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
  • B29C 64/25 - Housings, e.g. machine housings
  • B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor

9.

RADIATION METHOD FOR ADDITIVE MANUFACTURING

      
Application Number EP2019057613
Publication Number 2019/185642
Status In Force
Filing Date 2019-03-26
Publication Date 2019-10-03
Owner FREEMELT AB (Sweden)
Inventor Ljungblad, Ulric

Abstract

The present invention relates to a method for manufacturing a three-dimensional object by solidifying selected areas of consecutive powder layers. At least one electron beam successively irradiates predetermined sections of each powder layer by moving an interaction region in which the electron beam interacts with the powder layer. Electromagnetic radiation from a radiation source is directed onto the powder layer to reduce local electrostatic charging in the interaction region. In this way, levitation and scattering of charged powder will be avoided.

IPC Classes  ?

  • B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
  • B33Y 10/00 - Processes of additive manufacturing

10.

ELECTROCHEMICAL CLEANING OF AN ADDITIVELY MANUFACTURED PART

      
Application Number EP2019057618
Publication Number 2019/185647
Status In Force
Filing Date 2019-03-26
Publication Date 2019-10-03
Owner FREEMELT AB (Sweden)
Inventor
  • Wildheim, Martin
  • Stephansen, Robin

Abstract

The present invention relates to a method for removing powder from a component or part produced by metal additive manufacturing systems based on powder beds. The method comprising the steps; to manufacture a part by additive manufacturing, said part having at least one internal cavity with at least one external opening. Said internal cavity is at least partly filled with powder, said powder in said internal cavity having grains agglomerated or connected to each other; to evacuate gas from said internal cavity; to add liquid electrolyte to said internal cavity; to use an electrochemical process for separating connected powder grains in said cavity.

IPC Classes  ?

  • C25F 1/00 - Electrolytic cleaning, degreasing, pickling, or descaling
  • C25F 3/00 - Electrolytic etching or polishing
  • C25F 7/00 - Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
  • B33Y 10/00 - Processes of additive manufacturing
  • B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling

11.

FREEZING METHOD FOR CLEANING AN ADDITIVE MANUFACTURING PART

      
Application Number EP2019057624
Publication Number 2019/185651
Status In Force
Filing Date 2019-03-26
Publication Date 2019-10-03
Owner FREEMELT AB (Sweden)
Inventor Stephansen, Robin

Abstract

The present invention relates to a method for removing powder from a component or part produced by a powder bed additive manufacturing system. The method comprises the steps; providing a part, the part having at least one internal cavity with at least one external opening, the at least one cavity being at least partly filled with powder grains, the powder grains being connected to each other and to the walls of the cavity by mechanical, frictional, electrical, physical or chemical forces; adding medium in liquid phase to the at least one cavity of the part, the liquid having the property that it expands in phase transition from liquid to solid phase; transforming added medium to solid phase to loosen and break up at least a fraction of the powder grains connections from each other; and removing powder from the at least one internal cavity.

IPC Classes  ?

  • B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
  • B22F 3/24 - After-treatment of workpieces or articles
  • B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
  • B08B 9/00 - Cleaning hollow articles by methods or apparatus specially adapted thereto
  • B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
  • B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups

12.

CATHODE ASSEMBLY FOR ELECTRON GUN

      
Application Number EP2019057314
Publication Number 2019/180242
Status In Force
Filing Date 2019-03-22
Publication Date 2019-09-26
Owner FREEMELT AB (Sweden)
Inventor
  • Ljungblad, Ulric
  • Stephansen, Robin

Abstract

The present invention relates to a cathode assembly for emitting charged particles, used in for example an electron gun as source for generating an electron beam. The cathode assembly has a cathode comprising an emitting member and a carrier. The emitting member is mounted in the carrier, and the carrier is electrically connected to a holder. The cathode is heated by irradiation from an external source, whereby the emitting member emits charged particles from an emitting surface at an emitting temperature. The connection between the carrier and the holder provides a thermal barrier for reducing the amount of thermal energy transferred from the cathode to the holder.

IPC Classes  ?

  • H01J 1/20 - Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
  • H01J 37/075 - Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser