Creating a breakaway region

Patent metadata

Field	Value
Publication number	US-11433457-B2
Application number	US-201816605247-A
Country	US
Kind code	B2
Filing date	May 10, 2018
Priority date	Feb 28, 2018
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

An apparatus is disclosed to create a breakaway junction for 3D printed parts. Powder is spread along a target zone, such as a build bed. A liquid functional agent is selectively dispensed upon the powder to form a 3D object, a supporting part, and the breakaway junction between them.

First claim

We claim:

1. A method comprising:
receiving an object model of a three-dimensional (3D) part to be formed, the object model comprising data relating to the 3D part, the 3D part comprising a 3D object, a support of the 3D object, and a junction between the 3D object and the support;
enabling selective deposition of a metal powder and a binding liquid functional agent (LFA) on a build bed based on the object model of the 3D object; and
enabling selective deposition of the metal powder and a breakaway LFA comprising a precursor based on the object model of the junction, wherein the combination of the precursor and the metal powder is to form a metal carbide, an intermetallic, or both.

2. The method of claim 1 , further comprising enabling selective deposition of the metal powder and the binding LFA on the build bed based on the object model of the support.

3. The method of claim 1 , wherein:
the precursor is elemental carbon;
the metal powder includes iron; and
the metal carbide that is formed is cementite.

4. The method of claim 1 , wherein:
the precursor is elemental silicon;
the metal powder includes iron; and
the intermetallic that is formed is ferrosilicon.

5. The method of claim 1 , wherein:
the precursor is elemental carbon;
the metal powder includes chromium; and
the metal carbide that is formed is a chromium carbide.

6. The method of claim 1 , wherein:
the precursor is elemental silicon;
the metal powder includes chromium; and
the intermetallic that is formed is a chromium silicide.

7. The method of claim 1 , wherein:
the precursor is elemental carbon;
the metal powder includes titanium; and
the metal carbide that is formed is titanium carbide.

8. The method of claim 1 , wherein:
the precursor is elemental silicon;
the metal powder includes titanium; and
the intermetallic that is formed is a titanium silicide.

9. A method comprising:
receiving an object model of a three-dimensional (3D) part to be formed, the object model comprising data relating to the 3D part, the 3D part comprising a 3D object, a support of the 3D object, and a junction between the 3D object and the support;
enabling selective deposition of a metal powder and a binding liquid functional agent (LFA) on a build bed based on the object model of the support;
enabling selective deposition of the metal powder and the binding LFA on the build bed based on the object model of the 3D object; and
enabling selective deposition of the metal powder and a breakaway LFA comprising a precursor on the build bed based on the object model of the junction, wherein the breakaway LFA comprising the precursor is jetted into the build bed and a liquid carrier of the breakaway LFA is evaporated from the build bed until the junction comprises a desired concentration of precursor.

Assignees

• Hewlett Packard Development Co

Inventors

• Shaarawi Mohammed S
• Mckinnell James
• Champion David A
• Kasperchik Vladek P

Classifications

• B22F10/43

  characterised by material · CPC title

• B22F10/00 Primary

  Additive manufacturing of workpieces or articles from metallic powder (apparatus or devices therefor B22F12/00) · CPC title

• B22F1/05

  Metallic powder characterised by the size or surface area of the particles · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B33Y40/20

  Post-treatment, e.g. curing, coating or polishing · CPC title