Method and material system for building models in layers

Patent metadata

Field	Value
Publication number	US-9321934-B2
Application number	US-201113977209-A
Country	US
Kind code	B2
Filing date	Dec 7, 2011
Priority date	Dec 29, 2010
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

The present invention describes a method for building models in layers, wherein a first material and subsequent thereto selectively a second material are applied in layers in a build space, and these two application steps are repeated until a desired model is obtained. The two materials form a solid object in a suitable mixing ratio, the first material including a particulate material and the second material being applied with the aid of a print head. The first material, the second material and/or the particulate material include one or more diamines and/or one or more dicarbonyl compounds as the binder.

First claim

What is claimed is:

1. A method for building models in layers, wherein a first material and subsequent thereto selectively a second material are applied in layers in a build space, and these two application steps are repeated until a desired model is obtained; the two materials form a solid body in a suitable mixing ratio; the first material includes particulate material; and the second material is applied with the aid of a print head, and wherein the first material, the second material or the particulate material includes at least one or more dicarbonyl compounds as a binder.

2. The method according to claim 1 , wherein the method includes a step of printing a final applied layer, and the solid body remains in a powder bed under environmental conditions for 5 to 24 hours after the final applied layer has been printed.

3. The method according to claim 1 , wherein the solid body is subjected to heat treatment in an additional step, the solid body being stored at 40° C. to 60° C.

4. A material system for building models in layers, comprising a first material and a second material, wherein one of the materials includes a particulate material and one of the materials includes one or multiple diamines and one of the materials includes one or multiple dicarbonyl compounds as a binder.

5. A method for building models in layers, wherein a first material and subsequent thereto selectively a second material are applied in layers in a build space, and these two application steps are repeated until a desired model is obtained; the two materials form a solid body in a suitable mixing ratio; the first material contains a particulate material; and the second material is applied with the aid of a print head, wherein the composition comprising the first and second materials includes diamines and dicarbonyl compounds.

6. The material system according to claim 4 , wherein the first material contains organic or inorganic substances which do not participate in a reaction with the binder.

7. The material system according to claim 4 , wherein a particular material containing PMMA or a powder based on PA is used as the first material.

8. The material system according to claim 4 , wherein the second material is an atomizable solution which contains diamines or dicarbonyl compounds.

9. The method according to claim 1 , wherein the binder includes one or more diamines, and the first material, the second material or the particulate material includes the at least one or more diamines.

10. The material system according to claim 4 , wherein the second material is a solvent.

11. The material system according to claim 4 , wherein the second material contains the diamines or dicarbonyl compounds in a liquid phase.

12. The material system according to claim 11 , wherein the material system includes metal salts of dicarbonyl compounds.

13. The method according to claim 9 , wherein the method includes a step of reacting the one or more diamines and the one or more dicarbonyl compounds and a step of removing condensate of the reaction from the system with the aid of hygroscopic substances.

14. The material system according to claim 4 , wherein the diamine and/or the dicarbonyl compound is present in a carrier solution.

15. The material system of claim 4 , wherein the one or multiple diamines includes a diamine selected from the group comprising primary diamine alkanes, polyamines, aromatic diamines, diaminobenzoic acids, and liquid diamines.

16. The material system according to claim 15 , wherein the diamine is present in a quantity of 5 to 15 wt % in relation to the total quantity.

17. The material system according to claim 4 , wherein the dicarbonyl compound is selected from the group consisting of diketone compounds and their metal complexes, liquid dialdehydes, solid phthaldialdehyde, solid isophthaldialdehyde and solid terephthaldialdehyde.

18. The material system according to claim 4 , wherein the binder is between 5% and 40%.

19. A solid body manufactured with the method of claim 1 , wherein the solid body has a modulus of elasticity of 700 to 950 MPa.

20. The material system according to claim 4 , wherein the second material is a solvent mixture of benzyl alcohol, hexylacetate and 2-propanol.

Assignees

• Mögele Florian
• Kellner Imke Nora
• Voxeljet Ag

Inventors

• Mögele Florian
• Kellner Imke Nora

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B29K2033/12

  Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate · CPC title

• B29C67/0081

  Operations & Transport · mapped topic

• B05D1/00

  Processes for applying liquids or other fluent materials (B05D5/00, B05D7/00 take precedence) · CPC title

• Y10T428/24802

  Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] · CPC title