Hewlett-packard Development Company, L.p.

Kristopher J Erickson

Lihua Zhao

Thomas C Anthony

Howard S Tom

Krzysztof Nauka

Aja Hartman

Jarrid Wittkopf

Sivapackia Ganapathiappan

William James Allen

Alexey S Kabalnov

Adekunle Olubummo

John Samuel Dilip Jangam

David George

Sterling Chaffins

Yan Zhao

Rafael A Ballagas

Paul Olubummo

Kevin P Dekam

Ali Emamjomeh

Stephen G Rudisill

Anthony William McLennan

Ingeborg Tastl

Andrew E Fitzhugh

Cory J Ruud

Melanie M Gottwals

Douglas Pederson

Robert Ionescu

Jami Ryan Barone

Anthony J Galvan

M Anthony Lewis

Ruhua Cai

A powder bed material can include from 80 wt % to 100 wt % metal particles having a D50 particle size distribution value from 4 μm to 150 μm. From 10 wt % to 100 wt % of the metal particles can be surface-activated metal particles having in intact inner volume and an outer volume with structural defects. The structural defects can exhibit an average surface grain density of 50,000 to 5,000,000 per mm.

Powder bed materials

Examples of binder agents for a three-dimensional (3D) printing process are disclosed. In an example, the binder agent includes copper nanoparticles and a liquid vehicle. In this example, the liquid vehicle includes an antioxidant, polyethylene glycol hexadecyl ether, and a balance of water. Another example of the binder agent includes stainless steel nanoparticles and a liquid vehicle. In this example, the liquid vehicle includes polyethylene glycol hexadecyl ether, and a balance of water. Still another example of the binder agent includes nickel nanoparticles and a liquid vehicle. The liquid vehicle includes an antioxidant; a symmetric triblock copolymer including poly(ethylene oxide) and poly(propylene oxide), and a balance of water.

Binder agent

A three-dimensional printing method can include iteratively applying polymer build material as individual layers; based on a three-dimensional object model, selectively jetting an electromagnetic radiation absorber and a translucency-modulating plasticizer onto individual layers of the polymer build material; and exposing the powder bed to electromagnetic energy to selectively fuse portions of individual layers of the polymer build material together to form a three-dimensional object. The polymer build material can include from about 60 wt % to 100 wt % polymeric particles having an average particle size from about 10 ?m to about 150 ?m and a degree of crystallinity from about 2% to about 60%, to a powder bed. At the locations where the polymer build material includes jetted translucency-modulating plasticizer, the three-dimensional object can exhibit an optical transmittance from about 5% to about 80%.

Three-dimensional printing

In an example 3D printing method, an electrical conductivity value for a resistor is identified. Based upon the identified electrical conductivity value, a predetermined amount of a conductive agent is selectively applied to at least a portion of a build material layer in order to introduce a predetermined volume percentage of a conductive material to the resistor. Based upon the identified electrical conductivity value and the predetermined volume percent of the conductive material, a predetermined amount of a resistive agent is selectively applied to the at least a portion of the build material layer in order to introduce a predetermined volume percentage of a resistive material to the resistor. The build material layer is exposed to electromagnetic radiation, whereby the at least the portion coalesces to form a layer of the resistor.

According to an example, a green body may include from about 1 wt. % to about 20 wt. % of a metal nanoparticle binder and a build material powder, wherein the metal nanoparticle binder is selectively located within an area of the green body to impart a strength greater than about 3 MPa.

Green body including a metal nanoparticle binder

In one example in accordance with the present disclosure, a system is described. The system includes a reader to read an identifier from a storage element associated with a part. An extractor of the system extracts, based on the identifier, lifecycle conditions specific to the part. A controller of the system alters manufacturing operations based on extracted lifecycle conditions for the part.

Lifecycle condition-based manufacturing alteration

In one example in accordance with the present disclosure, a system is described. The system includes a reader to 1) read an identifier from a three-dimensional (3D) System printed object that includes a storage element and 2) read a location of the 3D printed object within a build material bed. An extractor of the system extracts, based on the identifier, a post processing operation to execute on the 3D printed object. A controller of the system controls a post processing operation based on extracted post processing operation information and the location.

Automated handling based on part identifier and location

In an example, a method is described that includes building a first layer of a three-dimensional heterogeneous object in a first plurality of passes of an additive manufacturing system. An electronic component is inserted directly into the first layer. The electronic component is then fused to the first layer in a second plurality of passes of the additive manufacturing system.

Fusing electronic components into three-dimensional objects via additive manufacturing processes

A system for forming a multiple layer object, the system including: a spreader to form a layer of polymer particles, the polymer particles having a melting temperature (Tm) of at least 250° C.; a fluid ejection head to selectively deposit a first fusing agent on a first portion of the layer and selectively deposit a second fusing agent on a second portion of the layer, wherein the fluid ejection head does not deposit the fusing agent on a third portion of the layer; and a heat source to heat the first portion and second portion, wherein the first portion is part of the multiple layer object and the second portion is not part of the multiple layer object and the second portion raises a temperature of polymer particles in a subsequent layer.

3D forming objects using high melting temperature polymers

In one example in accordance with the present disclosure, a system is described. The system includes a reader to read an identifier associated with a part. An extractor of the system extracts, based on the identifier, sensor output data for the part. A transmitter of the system transmits a re-order request for the part based on the sensor output data.

Part re-order based on part-specific sensor data

According to examples, an object may include a shell including a polymer binder and build material powder; and a core at least partially encompassed by the shell, the core including build material powder and a metal nanoparticle binder.

Objects having cores with nanoparticle binders

According to examples, a brown body has from about 0.02 wt. % to about 10 wt. % of a metal nanoparticle binder, in which the metal nanoparticle binder is selectively located within an area of the brown body to impart a strength greater than about 1 kPa to the area.

Brown body including a metal nanoparticle binder

A device includes a coater, a dispenser, and a treatment portion. The coater is to coat, layer-by-layer, a build material relative to a build pad to form a 3D object. The dispenser is to at least dispense a fluid including a first at least potentially electrically conductive material in at least some selected locations of an external surface of the 3D object. The treatment portion is to treat the 3D object to substantially increase electrically conductivity on the external surface of the 3D object at the at least some selected locations.

Increasing electrical conductivity at selected locations of a 3D object

In one example in accordance with the present disclosure, a system is described. The system includes at least one directional antenna to 1) emit energy waves towards a mass in which an object is disposed and 2) receive reflected signals from a resonator disposed on the object as the mass is moved relative to the directional antenna. The system also includes a controller to, based on received reflected signals, determine a pose of the object within the mass.

Growing community of inventors

Palo Alto, CA, United States of America

Kristopher J Erickson