公开(公告)号：US20220134640A1

公开(公告)日：2022-05-05

申请号：US17578572

申请日：2022-01-19

申请人： Stratasys Ltd.

发明人： Avraham LEVY ,  Diana RAVICH ,  Elena SHPAYZER ,  Mariana POKRASS

IPC分类号： B29C64/124 ,  B29C64/112 ,  C08F220/18 ,  B33Y70/00 ,  B33Y50/02 ,  B33Y40/20 ,  C08F2/50 ,  C08K5/07 ,  C08K5/5397

摘要： Formulations usable in additive manufacturing such as 3D inkjet printing which provide a transparent material when hardened, are provided. The formulation are designed so as to provide transparent objects or parts thereof with improved transmittance and color properties such as yellowness index, compared to commercially available formulations. The formulations comprise a photoinitiator at a relatively low amount and designed mixture of curable materials.

公开(公告)号：US20230391002A1

公开(公告)日：2023-12-07

申请号：US18033082

申请日：2021-10-21

申请人： Stratasys Ltd.

发明人： Lev KUNO ,  Mariana POKRASS ,  Diana RAVICH ,  Gil SHELEF

IPC分类号： B29C64/188 ,  B29C71/04

CPC分类号： B29C64/188 ,  B29C71/04 ,  B33Y40/20

摘要： A method of treating an object fabricated from a modeling material by additive manufacturing, comprises exposing the object to visible light having a peak wavelength less than 470 nm, and to a temperature of less than a heat deflection temperature (HDT) of the modeling material.

公开(公告)号：US20210154991A1

公开(公告)日：2021-05-27

申请号：US17143269

申请日：2021-01-07

申请人： Stratasys Ltd.

发明人： Diana RAVICH ,  Eduardo NAPADENSKY

IPC分类号： B33Y10/00 ,  B29C64/112 ,  B29C64/393

摘要： A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object. Each layer is formed by dispensing at least one modeling material to form an uncured layer, and curing the uncured layer by radiation. In various exemplary embodiments of the invention the method comprises, for at least one layer, forming a stack of sacrificial radiation-protective layers to cover an exposed portion of the layer, such that an upper layer of the stack remains exposed during formation of any subsequent layer of the plurality of layers.

公开(公告)号：US20200016822A1

公开(公告)日：2020-01-16

申请号：US16335305

申请日：2017-09-20

申请人： STRATASYS LTD.

发明人： Avraham LEVY ,  Diana RAVICH ,  Lior ZONDER ,  Gil SHELEF ,  Cesar M. MANNA

IPC分类号： B29C64/118 ,  B33Y80/00 ,  B33Y10/00 ,  B33Y70/00

摘要： 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.

公开(公告)号：US20230001631A1

公开(公告)日：2023-01-05

申请号：US17900930

申请日：2022-09-01

申请人： Stratasys Ltd.

发明人： Diana RAVICH ,  Ophira MELAMED ,  Avraham TEKEN ,  Gavish MIDA ,  Avraham LEVY ,  Cesar M. MANNA

IPC分类号： B29C64/112 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/295 ,  B29C64/106 ,  B29C64/291 ,  B29C35/08 ,  C09D11/101 ,  C09D11/107 ,  C09D11/30 ,  B33Y80/00

摘要： A method of layerwise fabrication of a three-dimensional object is disclosed. The method comprises, for each of at least a few of the layers: dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both the first and the second modeling formulations, and at least one envelope region at least partially surrounding the core region using one of the first and the second modeling formulations but not the other one of the first and the second modeling formulations. The method can also comprise exposing the layer to curing energy. The first modeling formulation is characterized, when hardened, by heat deflection temperature (HDT) of at least 90° C., and the second modeling formulation is characterized, when hardened, by Izod impact resistance (IR) value of at least 45 J/m.

公开(公告)号：US20170282452A1

公开(公告)日：2017-10-05

申请号：US15626219

申请日：2017-06-19

申请人： Stratasys Ltd.

发明人： Diana RAVICH ,  Eduardo NAPADENSKY

IPC分类号： B29C67/00

CPC分类号： B33Y10/00 ,  B29C64/112 ,  B29C64/20 ,  B29C64/393 ,  B33Y50/02

摘要： A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object. Each layer is formed by dispensing at least one modeling material to form an uncured layer, and curing the uncured layer by radiation. In various exemplary embodiments of the invention the method comprises, for at least one layer, forming a stack of sacrificial radiation-protective layers to cover an exposed portion of the layer, such that an upper layer of the stack remains exposed during formation of any subsequent layer of the plurality of layers.

公开(公告)号：US20220079547A1

公开(公告)日：2022-03-17

申请号：US17419845

申请日：2019-12-30

申请人： Stratasys Ltd.

发明人： Daniel DIKOVSKY ,  Diana RAVICH ,  Avraham LEVY ,  Ben KLEIN

IPC分类号： A61B6/00 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/112

摘要： A formulation usable as a modeling material formulation in additive manufacturing of a three-dimensional object and additive manufacturing methods utilizing same are provided. The formulation comprises one or more curable materials; and a radiopaque material, and features, when hardened, a CT number of at least 100 HU at 70 kV. Objects made by the additive manufacturing method utilizing the formulation are usable as radiological phantoms.

公开(公告)号：US20190329488A1

公开(公告)日：2019-10-31

申请号：US16335299

申请日：2017-09-20

申请人： Stratasys Ltd.

发明人： Diana RAVICH ,  Ophira MELAMED ,  Avraham TEKEN ,  Gavish MIDA ,  Avraham LEVY ,  Cesar M. MANNA

IPC分类号： B29C64/112 ,  B29C64/295 ,  B29C64/291 ,  B29C35/08 ,  B33Y10/00 ,  B33Y70/00 ,  C09D11/101 ,  C09D11/107 ,  C09D11/30

摘要： A method of layerwise fabrication of a three-dimensional object is disclosed. The method comprises, for each of at least a few of the layers: dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both the first and the second modeling formulations, and at least one envelope region at least partially surrounding the core region using one of the first and the second modeling formulations but not the other one of the first and the second modeling formulations. The method can also comprise exposing the layer to curing energy. The first modeling formulation is characterized, when hardened, by heat deflection temperature (HDT) of at least 90° C., and the second modeling formulation is characterized, when hardened, by Izod impact resistance (IR) value of at least 45 J/m.