Methods for fabricating low cost 3-D printed parts with expanded material properties

Patent metadata

Field	Value
Publication number	US-10906256-B2
Application number	US-201615578336-A
Country	US
Kind code	B2
Filing date	Jun 6, 2016
Priority date	Jun 4, 2015
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A 3-D (three dimensional) printing system is provided that includes a customized matrix having suitable material properties and geometric patterning to facilitate filling and retention of one or more filler material. The customized matrix defines the geometry and shape of the object. A filler mechanism that fills the customized matrix with one or more filler materials. The one or more filler materials retained within the customized matrix are cured or solidified to produce the object.

First claim

What is claimed is:

1. A three-dimensional (3D) printing system that forms an object comprising:
a submersion fluid located within an enclosed space;
a customized matrix submersed in the submersion fluid and located within the enclosed space, the customized matrix configured to have material properties and geometric patterning to facilitate filling and retention of one or more filler materials, wherein the customized matrix defines the geometry and shape of the object; and
a casting material configured to be introduced inside the customized matrix submersed in the submersion fluid, the casting material retained within the customized matrix configured to be cured or solidified to produce the object.

2. The 3D printing system of claim 1 , wherein the customized matrix is hydrophobic and the submersion fluid is hydrophilic.

3. The 3D printing system of claim 1 , wherein the customized matrix is hydrophilic and the submersion fluid is hydrophobic.

4. The 3D printing system of claim 1 , wherein the submersion fluid is picked to have any one of, or a combination of, the following properties: a property that assists in filling and retention of the casting material, a property that targets a surface quality of casting material, a density of the submersion fluid that is picked to match that of the casting material, a viscosity of the submersion fluid that is picked to limit convective disturbances during filling and/or curing, a thermal property of the submersion fluid that permits cooling/heating to control curing of the casting material, a transmission property of the submersion fluid that permits radiative energy transfer to control curing, and an incompressible property to facilitate hydraulic pressure application.

5. The 3D printing system of claim 1 , wherein the customized matrix is a 3D printed preform matrix.

6. The 3D printing system of claim 1 , wherein the customized matrix is constructed from a set of premade geometric forms that can be affixed together to form the customized matrix.

7. The 3D printing system of claim 6 , wherein one or more sensors are built into at least a subset within the set of premade geometric forms.

8. The 3D printing system of claim 1 , wherein the submersion fluid comprises one or more properties to assist in the filling of the customized matrix by the casting material.

9. The 3D printing system of claim 1 , wherein the submersion fluid comprises one or more properties to assist, retard, or influence curing of the casting material.

10. The 3D printing system of claim 9 , wherein the one or more properties of the submersion fluid comprise heating, cooling, radiation/UV light transmittance.

11. The 3D printing system of claim 1 , wherein the object comprises sensors positioned within the customized matrix prior to filling with and curing of casting material.

12. The 3D printing system of claim 1 , wherein the density of the casting material is tuned to match the density of the submersion fluid to counteract the effects of gravity on the casting material in the customized matrix.

13. The 3D printing system of claim 1 , wherein the viscosity of the casting material supports the filling of the customized matrix by the casting material by retarding convective forces arising within the submersion fluid.

Assignees

• Massachusetts Inst Technology

Inventors

• Kolandaivelu Kumaran

Classifications

• B29C69/00 Primary

  Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore {(B29C48/001 takes precedence)} · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29K2105/124

  Nanofibers · CPC title

• B29C70/64

  the filler influencing the surface characteristics of the material, e.g. by concentrating near the surface or by incorporating in the surface by force · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title