公开(公告)号：US20240157632A1

公开(公告)日：2024-05-16

申请号：US18546734

申请日：2021-09-13

Applicant: Stratasys Powder Production Ltd.

Inventor： Gianluca Dorini ,  Anders HARTMANN ,  Neil HOPKINSON ,  Frederik TJELLESEN

IPC: B29C64/153 ,  B29C64/236 ,  B29C64/277 ,  B29C64/295 ,  B29C64/393 ,  B33Y10/00 ,  B33Y50/02

CPC classification number: B29C64/153 ,  B29C64/236 ,  B29C64/277 ,  B29C64/295 ,  B29C64/393 ,  B33Y10/00 ,  B33Y50/02

Abstract: A controller and method for layer-by-layer manufacturing of a three-dimensional object from a powder. The method includes, in a first direction across a build area: moving a droplet deposition unit and depositing a radiation absorber onto regions of a previously applied layer of powder; moving a first radiation source according to a first velocity profile whilst activating the first radiation source to fuse the regions of powder where the absorber has been deposited; moving a powder distributor according to a second velocity profile and distributing a fresh layer of powder; and moving a second radiation source whilst activating the second radiation source to preheat the fresh layer of powder. The method further includes adjusting the first and/or second velocity profiles to control a time interval between the passing of the first radiation source and the powder distributor.

公开(公告)号：US20230405932A1

公开(公告)日：2023-12-21

申请号：US18453794

申请日：2023-08-22

Applicant: Stratasys Powder Production Ltd.

Inventor： Frederik TJELLESEN ,  Anders HARTMANN ,  Alexander RASMUSSEN

IPC: B29C64/307 ,  B29C64/214 ,  B29C64/314 ,  B29C64/321 ,  B29C64/357 ,  B29C64/153 ,  B29C64/245 ,  B29C64/255 ,  B29C64/295 ,  B33Y40/00 ,  B22F10/73 ,  B22F12/50

CPC classification number: B29C64/307 ,  B29C64/214 ,  B29C64/314 ,  B29C64/321 ,  B29C64/357 ,  B29C64/153 ,  B29C64/245 ,  B29C64/255 ,  B29C64/295 ,  B33Y40/00 ,  B22F10/73 ,  B22F12/50 ,  B33Y30/00

Abstract: A method for recirculating powder in an apparatus for manufacturing a three-dimensional object from the powder. The powder recirculation method includes: providing powder in a powder repository, the powder being one of fresh powder, excess powder or a blend thereof; transferring the powder from the repository to a work surface; distributing the powder across a build surface and resulting in a portion of the powder defining excess powder; returning the excess powder back to the repository; monitoring the amount of powder in the repository relative to a predetermined amount of powder; and delivering fresh powder from a powder tank to the repository when the amount of powder in the repository is less than the predetermined amount and not delivering fresh powder when excess powder is being returned to repository and the amount of powder in the repository is greater than the predetermined amount of powder.

公开(公告)号：US20220184887A1

公开(公告)日：2022-06-16

申请号：US17685041

申请日：2022-03-02

Applicant: Stratasys Powder Production Ltd.

Inventor： Frederik TJELLESEN ,  Anders HARTMANN

IPC: B29C64/153 ,  B29C64/314 ,  B29C64/245 ,  B29C64/255 ,  B29C64/241 ,  B01F27/053 ,  B01F27/112 ,  B01F27/1121 ,  B01F27/1125

Abstract: A stirring device for a powder tank of an apparatus for manufacturing a three-dimensional object. The stirring device is configured to rotate within the powder tank about an axis of rotation, and comprises a base plate and a strut. The strut extends from the base plate and is arranged to extend into the powder tank forming an obtuse angle with the outer edge of the base plate