公开(公告)号：US12070897B2

公开(公告)日：2024-08-27

申请号：US16958713

申请日：2018-12-27

Applicant: Stratasys Ltd.

Inventor： Mariana Pokrass ,  Omer Sinwani ,  Shai Sultan ,  Lev Kuno ,  Gil Shelef

IPC: B29C64/129 ,  B29C64/209 ,  B29C64/277 ,  B29C64/393 ,  B29K79/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  C08G73/12

CPC classification number: B29C64/129 ,  B29C64/209 ,  B29C64/277 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  C08G73/128 ,  B29K2079/08

Abstract: A method of additive manufacturing of a three-dimensional object, comprises: dispensing from a first array of nozzles a modeling material formulation containing a polyimide precursor to form a layer in a configured pattern corresponding to a shape of a slice of the object; applying to the layer ultraviolet radiation and infrared radiation from two different radiation sources; and repeating the dispensing and the application of radiation to form a plurality of layers in configured patterns corresponding to shapes of other slices of the object. Optionally, an additional modeling material formulation or a support material formulation is dispensed from a second array of nozzles.

公开(公告)号：US11413826B2

公开(公告)日：2022-08-16

申请号：US17280282

申请日：2019-09-27

Applicant: Stratasys Ltd.

Inventor： Amit Feffer ,  Gil Shelef ,  Haim Rotfeld ,  David Prizant

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B29C64/364 ,  B29C64/112 ,  B28B1/00 ,  B28B17/00

Abstract: A system for additive manufacturing comprises a dispensing head for dispensing building materials on a working surface, a hardening system for hardening the building materials, a cooling system for evacuating heat away from the building materials, and a computerized controller. A thermal sensing system is mounted above the working surface in a manner that allows relative motion between the sensing system and the working surface, and is configured to generate sensing signals responsively to thermal energy sensed thereby. The controller controls the dispensing head to dispense the building materials in layers, the sensing system to generate the sensing signals only when the sensing system is above the building materials once hardened, and the heat evacuation rate of the cooling system responsively to the sensing signals.

公开(公告)号：US10994475B2

公开(公告)日：2021-05-04

申请号：US16335305

申请日：2017-09-20

Applicant: Stratasys Ltd.

Inventor： Avraham Levy ,  Diana Ravich ,  Lior Zonder ,  Gil Shelef ,  Cesar M. Manna

IPC: B29C41/22 ,  B29C41/46 ,  B29C71/02 ,  B29C71/04 ,  B29C64/118 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  B29C64/112 ,  B29C64/106 ,  B29K33/00 ,  B29K105/00

Abstract: Methods of layerwise fabrication of a three-dimensional object, and objected obtained thereby are provided. The methods are effected by dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both said first and said second modeling formulations, an inner envelope region at least partially surrounding said core region using said first modeling formulation but not said second modeling formulation, and an outer envelope region at least partially surrounding said inner envelope region using said second modeling formulations but not said first modeling formulation; and exposing said layer to curing energy, thereby fabricating the object, The first and second modeling formulations are selected such they differ from one another, when hardened, by at least one of Heat Deflection Temperature (HDT), Izod Impact resistance, Tg and elastic modulus.