公开(公告)号：US20220097291A1

公开(公告)日：2022-03-31

申请号：US17548649

申请日：2021-12-13

Applicant: Stratasys Ltd.

Inventor： Daniel DIKOVSKY ,  Avraham LEVY ,  Eduardo NAPADENSKY

IPC: B29C64/112 ,  B29C64/393 ,  B29C64/135

Abstract: A method of layerwise solid freeform fabrication is disclosed. The method comprises, for each of at least a few of the layers, dispensing and hardening at least a first modeling material and a second modeling material to form a core region and one or more envelope regions at least partially surrounding the core region. In some embodiments, the ratio between the elastic moduli of adjacent regions, when hardened, is from about 1 to about 20.

公开(公告)号：US20200016822A1

公开(公告)日：2020-01-16

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: B29C64/118 ,  B33Y80/00 ,  B33Y10/00 ,  B33Y70/00

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.

公开(公告)号：US20220134640A1

公开(公告)日：2022-05-05

申请号：US17578572

申请日：2022-01-19

Applicant: Stratasys Ltd.

Inventor： Avraham LEVY ,  Diana RAVICH ,  Elena SHPAYZER ,  Mariana POKRASS

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

Abstract: 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：US20190119514A1

公开(公告)日：2019-04-25

申请号：US15557137

申请日：2016-03-10

Applicant: Stratasys Ltd.

Inventor： Ira YUDOVIN-FARBER ,  Avraham LEVY ,  Mariana POKRASS

IPC: C09D11/101 ,  C09D11/30 ,  C09D11/107 ,  C09D11/102 ,  B29C64/40 ,  B33Y10/00 ,  B33Y70/00

Abstract: Novel support material formulations, characterized as providing a cured support material which is readily removable by contacting with water, are disclosed. The formulations comprise a curable water-soluble mono-functional monomer, a water-miscible polymer and a silicone polyether. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

公开(公告)号：US20220079547A1

公开(公告)日：2022-03-17

申请号：US17419845

申请日：2019-12-30

Applicant: Stratasys Ltd.

Inventor： Daniel DIKOVSKY ,  Diana RAVICH ,  Avraham LEVY ,  Ben KLEIN

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

Abstract: 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

Applicant: Stratasys Ltd.

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

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

Abstract: 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：US20180230246A1

公开(公告)日：2018-08-16

申请号：US15752621

申请日：2016-08-14

Applicant: Stratasys Ltd.

Inventor： Yuval VIDAVSKY ,  Dani PERI ,  Mariana POKRASS ,  Avraham LEVY ,  Eynat MATZNER

IPC: C08F2/48 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/112 ,  B29C64/40 ,  B29C64/35 ,  B33Y40/00 ,  C11D7/06

CPC classification number: B29C64/40 ,  B29C35/08 ,  B29C64/112 ,  B29C64/35 ,  B29K2033/04 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08F2/48 ,  C08F220/28 ,  C08F283/06 ,  C11D7/06 ,  C11D7/14 ,  G03F7/0037 ,  G03F7/027 ,  G03G9/08722 ,  G03G9/08728 ,  G03G9/08793 ,  G03G9/08795 ,  C08F2220/286 ,  C08F2222/1013 ,  C08F220/54

Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

公开(公告)号：US20240092033A1

公开(公告)日：2024-03-21

申请号：US18520708

申请日：2023-11-28

Applicant: Stratasys Ltd.

Inventor： Yuval VIDAVSKY ,  Dani PERI ,  Mariana POKRASS ,  Avraham LEVY ,  Eynat MATZNER

IPC: B29C64/40 ,  B29C64/112 ,  B29C64/35 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  C08F2/48 ,  C08F220/28 ,  C08F283/06 ,  C11D3/04 ,  C11D3/08 ,  C11D7/06 ,  C11D7/14 ,  G03G9/087

CPC classification number: B29C64/40 ,  B29C64/112 ,  B29C64/35 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  C08F2/48 ,  C08F220/28 ,  C08F220/286 ,  C08F283/06 ,  C11D3/044 ,  C11D3/08 ,  C11D7/06 ,  C11D7/14 ,  G03G9/08722 ,  G03G9/08728 ,  G03G9/08793 ,  G03G9/08795 ,  B29C35/08

Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

公开(公告)号：US20220088884A1

公开(公告)日：2022-03-24

申请号：US17542549

申请日：2021-12-06

Applicant: Stratasys Ltd.

Inventor： Yuval VIDAVSKY ,  Dani PERI ,  Mariana POKRASS ,  Avraham LEVY ,  Eynat MATZNER

IPC: B29C64/40 ,  B33Y70/00 ,  B29C64/112 ,  G03G9/087 ,  C11D7/14 ,  C08F283/06 ,  C11D3/08 ,  C11D3/04 ,  C08F220/28 ,  C08F2/48 ,  B33Y10/00 ,  B33Y40/00 ,  B29C64/35 ,  C11D7/06

Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

公开(公告)号：US20190054683A1

公开(公告)日：2019-02-21

申请号：US16166228

申请日：2018-10-22

Applicant: Stratasys Ltd.

Inventor： Avraham LEVY ,  Keren REGEV ,  Claudio ROTTMAN ,  Shai HIRSCH

IPC: B29C64/112 ,  B29C64/386 ,  B29C64/124 ,  B29C64/40 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02

Abstract: 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, thereby forming the object. The formation of each layer comprises dispensing at least one uncured building material, and at least partially curing the uncured building material, wherein for at least one layer, the curing is initiated at least t seconds after commencement of curing of a layer immediately preceding that layer. The t parameter is longer than the number of seconds required for the formation of the layer.