Three-dimensional (3D) printing

Patent metadata

Field	Value
Publication number	US-11110653-B2
Application number	US-201515763223-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	Oct 23, 2015
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

In a three-dimensional printing method example, a polymeric or polymeric composite build material is applied. A fusing agent is applied on at least a portion of the build material. The fusing agent includes an aqueous or non-aqueous vehicle and a plasmonic resonance absorber having absorption at wavelengths ranging from 800 nm to 4000 nm and having transparency at wavelengths ranging from 400 nm to 780 nm dispersed in the aqueous or non-aqueous vehicle. The build material is exposed to electromagnetic radiation, thereby fusing the portion of the build material in contact with the fusing agent to form a layer.

First claim

What is claimed is:

1. A three-dimensional (3D) printing method, comprising:
preparing a fusing agent by:
diluting a dispersion including a plasmonic resonance absorber which is an inorganic pigment selected from the group consisting of lanthanum hexaboride, tungsten bronzes, indium tin oxide, aluminum zinc oxide, ruthenium oxide, silver, gold, platinum, iron pyroxenes, modified iron phosphates (A x Fe y PO 4 ), modified copper pyrophosphates (A x Cu y P 2 O 7 ), and combinations thereof;
centrifuging the diluted dispersion to separate the plasmonic resonance absorber;
milling the plasmonic resonance absorber; and
incorporating the plasmonic resonance absorber into an aqueous or non-aqueous vehicle including a silane coupling agent;

applying a polymeric or polymeric composite build material;
selectively applying the fusing agent on at least a portion of the polymeric or polymeric composite build material; and
exposing the polymeric or polymeric composite build material to electromagnetic radiation, thereby fusing the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer.

2. The method as defined in claim 1 wherein the aqueous vehicle includes water, a co-solvent, an anti-kogation agent, a surfactant, a dispersing additive, a chelating agent, and a biocide.

3. The method as defined in claim 1 , further comprising incorporating a colorant into the aqueous or non-aqueous vehicle.

4. The method as defined in claim 1 wherein prior to selectively applying the fusing agent, the method further comprises heating the polymeric or polymeric composite build material to a temperature ranging from about 50° C. to about 350° C.

5. The method as defined in claim 1 wherein the fusing agent includes from about 1 wt % to about 10 wt % of the plasmonic resonance absorber.

6. A three-dimensional (3D) printing method, comprising:
preparing a fusing agent by:
diluting a cesium tungsten oxide dispersion with 2-pyrrolidone at 1:1 w/w to form a diluted dispersion;
distilling the diluted dispersion at a temperature of about 60° C. and a pressure of about 20 mm Hg to form a stock dispersion including a plasmonic resonance absorber; and
incorporating the stock dispersion into an aqueous or non-aqueous vehicle;

applying a polymeric or polymeric composite build material;
selectively applying the fusing agent on at least a portion of the polymeric or polymeric composite build material; and
exposing the polymeric or polymeric composite build material to electromagnetic radiation, thereby fusing the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer.

7. The method as defined in claim 6 wherein the aqueous vehicle includes water, a co-solvent, an anti-kogation agent, a surfactant, a dispersing additive, a chelating agent, and a biocide.

Assignees

• Hewlett Packard Development Co

Inventors

• Rudisill Stephen G
• Kabalnov Alexey S
• Prasad Keshava A
• Ganapathiappan Sivapackia
• Wright Jake
• Kasperchik Vladek

Classifications

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• B29C64/112 Primary

  using individual droplets, e.g. from jetting heads · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B29C64/264

  Arrangements for irradiation · CPC title

• B29C64/165 Primary

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title