Stratasys, Inc.

Evolve Additive Solutions, Inc.

Convey Technology, Inc.

Stratsys, Inc.

Statasys, Inc.

Evolve Additive Solutons, Inc.

J Samuel Batchelder

William J Swanson

Kevin C Johnson

S Scott Crump

Steven A Chillscyzn

Timothy A Hjelsand

James W Comb

Robert L Zinniel

Zeiter Farah

David M Kozlak

Arun Chowdry

Dominic F Mannella

John Barnett

Timothy Sampson

Michael D Bosveld

Paul J Leavitt

Ronald G Schloesser

Manish Boorugu

Cynthia T Batchelder

Chris Counts

Luke Batchelder

James Batchelder

William R Priedeman, Jr

Paul E Hopkins

Andrea Lee Brosch

Donald J Holzwarth

Blake Zachary Courter

Daniel F Walczyk

Thomas P Paul

David L Pollard

Andrew Rice

Jonathan B Hedlund

Joseph L Calderon

Cynthia Trempel Batchelder

Aidan Zimmerman

Jonathan Bennhard Hedlund

James Baecker

Chris Anton

Paul H Fuchs

Moshe Aknin

Susan M Hayes Jacobson

Zeiter S Farah

A method of delivering an electric charge to a remote target with a CEW includes using one or more sensors in communication with the CEW to determine a threat level of a situation and contacting the target with at least one electrode wire discharged from the CEW. The method further includes applying an electric charge along the at least one electrode wire so that electrical charge flows between the CEW and the remote target based upon the determined threat level of the situation.

Proportional-response conductive energy weapon and method

A method for 3D printing a part in a layer-wise manner includes providing a pool of polymerizable liquid in a vessel over a build window and positioning a downward-facing build platform in the pool, thereby defining a build region above the build window. The method includes selectively curing a volume of polymerizable liquid in the build region by imparting electromagnetic radiation through the build window to form a printed layer of the part adhered to the build platform and scanning at least a portion of the build window with monochromatic, polarized light along a plane of incidence. The method includes measuring a change in intensity and polarity of the light to obtain information about the printed layer. The method includes raising the build platform to a height of a next layer to be printed and modifying the electromagnetic energy imparted into the next layer based upon the obtained information to print a next layer. The imparting, scanning, measuring, raising and modifying steps are repeated until the part is printed.

Part quality monitoring in a stereolithographic additive manufacturing system

A method for printing a 3D part in a layer-wise manner includes providing a pool of polymerizable liquid in a vessel over a build window and positioning a downward-facing build platform in the pool, thereby defining a build region above the build window. The method includes selectively curing a volume of polymerizable liquid in the build region by imparting electromagnetic radiation through the build window to form a printed layer of the part adhered to the build platform and actively cooling the build window to remove energy imparted by the electromagnetic radiation and the polymerization reaction of the polymerizable liquid such that the printed layer is between about 1° C. and about 30° C. below an average part temperature prior to raising the print layer and printing the next layer.

Thermal control in a stereolithographic 3D printer

A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes establishing first and second control parameter profiles, establishing a transfusion sequence, and transfusing n+m layers on a bonding region of previously accumulated layers of the 3D part according to the transfusion sequence. The first and second control parameter profiles each include a different combination of temperature and pressure parameters usable to transfuse a single layer of the 3D part. The transfusion sequence specifies the use of each of the first and second control parameter profiles in a specified order. A total thickness of the n+m layers is less than a thermal diffusion depth. The transfusion step includes transfusing n layers according to the first control parameter profile, and, after transfusing then layers, transfusing m layers according to the second control parameter profile.

Layer transfusion sequencing for selective deposition-based additive manufacturing

A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes developing a first layer of a powder material using at least one electrostatographic engine, supporting the developed first layer on a transfer medium, adjusting a first layer thermal profile of the developed first layer with a first thermal flux device, adding thermal energy to a part thermal profile that includes a bonding region of previously accumulated layers of the 3D part, transfusing the developed first layer on the bonding region of the previously accumulated layers of the 3D part, and removing thermal energy from the part thermal profile. A transfusion temperature at a start of the transfusing step can be equal to or greater than a transfusion threshold temperature, where the transfusion temperature is an average of the first layer thermal profile and the part thermal profile in the bonding region.

Thermal partitioning in an electrostatographic additive manufacturing system

A selective deposition-based additive manufacturing system capable of building a three-dimensional (3D) part utilizing a semi-crystalline polymeric material includes at least one electrostatographic engine configured to develop one or more layers of particles of semi-crystalline polymeric material corresponding to one or more slices of a 3D model of a 3D part. The system includes a transfer medium configured to receive the one or more layers of particles of the semi-crystalline polymeric material on a front side from the at least one electrostatographic engine and to move the one or more layers away from the electrostatographic engine and a platen configured to carry the 3D part or support being printed. The system includes a gantry coupled to the platen and configured to move the platen into registration with the one or more layers, and a heater configured to heat a top surface of the 3D part being printed to a transfuse temperature. The system includes a layer transfer assembly having a roller contacting a back side of the transfer medium and a driver configured to cause the layer to transfer from the front side of the transfer medium to the heated top surface of the part. The system includes a cooler configured to cool the heated semi-crystalline polymeric material at a maximum rate of at least 20° C. per second such that the semi-crystalline material is in a super-cooled state wherein the semi-crystalline polymeric material does not completely initially crystallize.

Selective deposition-based additive manufacturing device and method of printing 3D parts with semi-crystalline materials

Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process ('STEP') includes successively depositing multiple layers of part material and support material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple layers of part material and support material extend in a perpendicular to the first plane; and b) at least some of the layers of part material and support material are separated from each other to form a gap between the layers of part material and layers of support material; application of heat and pressure to the part material and support material such that a portion of the part material and support material flows into and at least partially fills the gap between the part material and support material.

Additive manufacturing system and method with improved surface finish

A method of delivering charge to a remote target includes pressurizing a reservoir of metallic conductor initially at a temperature below its melting point. The method includes flowing the metallic conductor through an orifice to form a continuous thread with axial velocity, so that a user might direct the axial velocity of the thread to intercept the remote target. The method further includes applying a potential differential along the thread so that electrical current flows between the reservoir and the remote target.

Pressure and heat conducted energy device and method

Disclosed are selective deposition based additive manufacturing systems () and methods for printing a 3D part. Layers of a powder material () are developed using one or more electrostatography-based engines (). The layers () are transferred for deposition on a part build surface. For each of the layers (), the part build surface is heated to a temperature within a range between a flowable temperature and a thermal oxidation threshold to form a flowable part build surface, and the developed layer () is pressed into contact with the flowable build surface () to heat the developed layers () to a flowable state and form a new part build surface () which is fully consolidated. The new part build surface () is then cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer.

Method of thermally transferring images in a selective deposition based additive manufacturing system

A laser assembly for use with an additive manufacturing system, which includes a base block configured to be moved along a scan direction axis in the additive manufacturing system, a plurality of laser emitters preferably arranged in an array of at least two rows of two or more laser emitters. At least a portion of a heat sink assembly is configured to draw heat away from the base block and/or the laser emitters. The assembly includes a controller assembly a controller assembly configured to control a movement of the base block along the first axis and to independently control at least timing and duration of energy emitted from each laser emitter of the plurality of laser emitters as the base block moves along the first axis.

Additive manufacturing system with laser assembly

Disclosed are selective deposition-based additive manufacturing systems () and methods for printing a 3D part (). Layers of a powder material () are developed using one or more electrostatographic engines (-). The layers () are transferred for deposition on a part build surface (). For each of the layers (), the part build surface () is pre-heated by impinging a first heat transfer liquid () toward the part build surface (), for example using a solder fountain. The developed layer () is pressed into contact with the heated part build surface () to heat the developed layer () to a flowable state and form a new part build surface () which is fully consolidated. The new part build surface () is then rapidly cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer ().

Method of thermally transferring layers in a selective deposition-based additive manufacturing system using conductive heat

A method of selective deposition-based additive manufacturing includes conveying a layer () of material to previously built layers () of material. A determination is made as to whether at least one of the conveyed layers () of material and a top previously built layer () of material contains an unsupported portion (). When at least one of the conveyed layer () of material and the top previously built layer () of material contains an unsupported portion, a first set of steps () are used to transfer the conveyed layer () of material to the top previously built layer () of material. When neither of the conveyed layer () of material and the top previously built layer () of material contains an unsupported portion, a second set of steps () are used to transfer the conveyed layer () of material to the top previously built layer () of material.

Building layers with unsupported portions through selective deposition-based additive manufacturing

A print assemblyfor use in an additive manufacturing systemto print three-dimensional parts, which includes a coarse positioner, a fine positioner, and a liquefier assembly, where a portion of the liquefier assemblyis operably mounted to the fine positionersuch that the fine positioneris configured to move the portion of the liquefier assemblyrelative to the coarse positioner

Print assembly for additive manufacturing system, and methods of use thereof

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Somers, NY, United States of America

J Samuel Batchelder