System and method for forming material substrate printer

Patent metadata

Field	Value
Publication number	US-10737324-B2
Application number	US-201414504646-A
Country	US
Kind code	B2
Filing date	Oct 2, 2014
Priority date	Oct 2, 2014
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

A method is disclosed for manufacturing a part via an additive manufacturing process. A solution is used which has a volatile component within which is suspended particles of a powdered material. The solution is heated until it at least one of begins boiling or is about to begin boiling. The heated solution is then deposited at least at one location on a substrate to help form a layer of the part. The volatile component then evaporates, leaving only the particles of powdered material. The particles are then heated to the melting point. The deposition and heating operations are repeated to successively form a plurality of layers for the part. The evaporation of the volatile component helps to cool the part.

First claim

What is claimed is:

1. A method for manufacturing a part via an additive manufacturing process, the method comprising:
forming a solution including a volatile component within which is suspended particles of a meltable metal powdered material able to form a structural part once fully melted and subsequently cooled, and wherein the volatile component enables deposition of the powdered material, the volatile component providing a cooling effect on a previously deposited material layer of a part being formed in a layer by layer process, and such that the cooling takes place intermittently with every application of a new quantity of powdered material about to be fused to form a new structural layer of the structural part;
performing a material deposition operation by depositing the solution, to at least one deposition location on a substrate to begin forming an initial layer of the structural part, and waiting a predetermined time period of at least about 1 millisecond to allow the volatile component to fully evaporate, thus leaving only the particles of powdered material at the one deposition location;
subsequent to expiration of the predetermined time period, performing a heating operation using an optical heat source to provide an optical beam to heat the particles of powdered material left from the deposited solution, to a temperature sufficient to melt and fuse the particles of a selected subportion of the powdered material together to form a single layer of the structural part, and a delivery of optical power from the optical beam being tuned to melt the particles of powdered material within a predetermined time frame, to form the selected sub-portion of a single layer of the structural part;
repeating the material deposition and heating operations to successively form a plurality of layers for the structural part, using the melted particles of powdered material to form each one of the plurality of layers for the part, and wherein each newly formed layer is fused to its previously formed said layer to form the structural part as single piece integrated structural part, and using the volatile component to keep a surface of each previously formed said layer of the part at a relatively constant temperature; and
removing the finished structural part from the substrate.

2. The method of claim 1 , wherein the volatile component in the solution comprises methanol.

3. The method of claim 1 , wherein the volatile component in the solution comprises acetone.

4. The method of claim 1 , wherein the volatile component in the solution comprises ethanol.

5. The method of claim 1 , further comprising forming a plurality of different solutions that include different types of powdered material.

6. The method of claim 5 , further comprising tailoring an amount of heat to be applied to each of the different types of powdered material to accomplish melting of the different types of powdered material.

7. The method of claim 5 , further comprising forming the plurality of different solutions using a plurality of different volatile components.

8. The method of claim 1 , wherein the solution is applied to a plurality of different areas on the substrate, and all of the particles of powdered material at the different areas on the substrate are heated at one time using the heat source.

9. A method for manufacturing a part via an additive manufacturing process, the method comprising:
forming a first solution having a first volatile component within which is suspended a first plurality of particles of metal powdered material;
forming a second solution having a second volatile component within which is suspended a second plurality of particles of powdered material;
the first and second solutions each providing a cooling effect on a previously formed material layer of melted material;
heating the first and second solutions to temperatures at which the first and second volatile components are at least about to begin boiling;
performing a material deposition operation by depositing the heated first and second solutions, while the first and second solutions are at least about at their boiling points, at first and second different locations on a substrate to help form an initial layer of the part, and waiting a predetermined time period of at least about one millisecond to allow the first and second volatile components to evaporate, such that a latent heat of evaporation of the first and second solutions cools the substrate, thus leaving only the first and second pluralities of particles of powdered material at the first and second different locations;
subsequent to expiration of the predetermined time period, performing a heating operation using an optical source which generates an optical beam, to at least substantially simultaneously heat the first and second pluralities of particles of powdered material to temperatures sufficient to selectively melt and fuse at least a selected subportion of the first plurality of particles of powdered material together, and to selectively melt and fuse at least a selected subportion of the second plurality of particles of powdered material together to form a single material layer of the part, a power of the optical beam being tuned to achieve selective melting of the selected subportions of the first and second pluralities of particles within a predetermined time frame;
repeating the material deposition and heating operations to cool each previously formed material layer before beginning a new heating operation on a newly deposited material layer, to successively form a plurality of layers until the part is fully formed as a finished part, and wherein each one of the plurality of layers is formed by the melted and fused selected subportions of the first and second pluralities of powdered material, and using the volatile components to keep a surface of each previously formed said layer of the part at a relatively constant temperature; and
removing the finished part from the substrate;
wherein the evaporation of the first and second volatile components helps to repeatedly, intermittently cool the part in between each heating operation while the particles of powdered material are being melted and fused to a previously formed material layer, as the part is being formed layer-by-layer into the finished part.

10. The method of claim 9 , further comprising tailoring the heating operation such that a different amount of heat is applied to each of the first and second pluralities of particles of powdered material to achieve a required melting.

11. The method of claim 9 , wherein at least one of the first and second volatile components comprises ethanol.

12. The method of claim 9 , wherein at least one of the first and second volatile components comprises acetone.

13. The method of claim 9 , wherein at least one of the first and second volatile components comprises methanol.

14. The method of claim 9 , wherein different levels of heat are used to heat the first and second pluralities of particles of powdered material.

15. The method of claim 9 , further comprising using a third plurality of particles of powdered material which forms a filler material for the part.

16. A method for manufacturing a part via an additive manufacturing process, the method comprising:
forming a solution including a volatile component within which is suspended particles of a metal meltable powdered material, and wherein the volatile component enables deposition of the powdered material;
performing a material deposition operation by depositing the solution, to at least one deposition location on a substrate to begin forming

Assignees

• L Livermore Nat Security Llc

Inventors

• Demuth James A
• Bayramian Andrew
• El-Dasher Bassem S
• Kramer Kevin J

Classifications

• B22F1/107

  containing organic material comprising solvents, e.g. for slip casting · CPC title

• B22F12/55

  Two or more means for feeding material · CPC title

• B22F10/50

  Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• B22F12/53

  Nozzles · CPC title