Method for the layered construction of plastic models

• US 8,715,832 B2
• Filed: 11/02/2009
• Issued: 05/06/2014
• Est. Priority Date: 11/20/2008
• Status: Active Grant

• Current Assignee: Voxeljet AG
• Original Assignee: Voxeljet AG
• Inventors: Ederer, Ingo, Gunther, Johannes, Gnuchtel, Ingo, Gunther, Daniel
• Primary Examiner(s): Ahmed, Sheeba
• Application Number:
  US13/129,443
• Publication Number:
  US 20110223437A1
• Time in Patent Office: 1,646 Days
• Field of Search: None
• US Class Current: 428/500
• CPC Class Codes: B29C 64/165 using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 70/00 Materials specially adapted for additive manufacturing
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

The invention relates to a method for implementing layered construction of plastic models, whereby a first material is applied to a building platform and thereupon a second material is selectively applied and these two application steps are respectively repeated layer after layer until the desired model is obtained. The two materials form a solid body when a suitable mixture ratio is used. The first material includes a particle material and the second material is applied via a print head and contains N-vinylformamide.

Claims

1. A method for implementing layered construction of plastic models, whereby a first material is applied to a budding platform and thereupon a second material is selectively applied and these two application steps are repeated until the desired model is obtained, the two materials form a solid body when a suitable mixture ratio is used, the first material represents a particle material and the second material is applied via a print head and contains N-vinylformamide, wherein the N-vinylformamide is not used for a cationic polymerization reaction.

3. The method according to claim 1, wherein the particle material includes an initiator, a crosslinking agent, or a catalyst.

4. The method according to claim 1, wherein N-vinylformamide is the main component of the second material.

5. The method according to claim 1, wherein the second material comprises an initiator, a catalyst, or a crosslinking agent.

8. The method according to claim 3, wherein N-vinylformamide is the main component of the second material.

10. The method according to claim 3, wherein the second material comprises an initiator, a catalyst, or a crosslinking agent.

13. The method of claim 1, wherein the includes a step of dissolving the particle material to release a component for starting a bonding reaction.

14. The method of claim 13, wherein the particle material is dissolved by the second material.

15. The method of claim 13, wherein the second material is a good solvent for the first material so that the dissolving step is characterized by rapid partial dissolution of the particle material.

16. The method of claim 1, wherein the bonding of the first and second materials takes place via a radical polymerization of a vinyl monomer.

17. The method of claim 1, wherein the process includes a step of triggering the cleavage of an initiator using a tertiary amine.

18. The method of claim 1, wherein the process includes a step of cross-linking the N-vinylformamide using a bifunctional acrylate.

2. A method for implementing layered construction of plastic models, comprising the steps of:

applying a first material to a building platform and

selectively applying a second material upon the first material;

wherein the two application steps are repeated until a desired model is obtained a mixture ratio of the first material and the second material is selected to form a solid body;

the first material represents is a particle material and the second material is applied via a print head and contains N-vinylformamide;

wherein the particle material contains a PMMA.

6. The method according to claim 2 wherein, wherein the particle material has includes an initiator, a crosslinking agent, or catalyst.

7. The method according to claim 2, wherein N-vinylformamide is the main component of the second material.

9. The method according to claim 2, wherein the second material comprises an initiator, a catalyst, or a crosslinking agent.

19. The method of claim 2, wherein the first material includes a dibenzoyl peroxide initiator.

20. The method of claim 2, wherein the process includes a step of dissolving the particle material to release a component for starting a bonding reaction.

11. A plastic model comprising:

a. more than one layers of a particle material wherein the particle material includes PMMA and

b. more than one layers of N-vinylformamide

wherein the particle material is applied to a building platform in layers and the N-vinylformamide is selectively applied via a print head to the particle material;

wherein the particle material and the N-vinylformamide are applied until a desired plastic model is obtained.

12. The plastic model of claim 11, further including an initiator, a crosslinking agent, or a catalyst suitable for being can be applied by a print head.