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US 11,691,337 B2Granted
Method for producing three-dimensional molded parts and regulating the moisture content in build material
AssigneeVoxeljet AG
InventorsIngo Ederer, Daniel Günther, Johannes Günther, Ingo Gnüchtel, Florian Mögele
Life of this patent
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Abstract
A method for producing three-dimensional molded parts by means of layering, the moisture content of the build material mixture being able to be regulated.
Claims20
A material system for producing three-dimensional models by layering, the material system comprising:
- as a first material in a coater:
- an admixture including
- i.) a particulate build material;
- and
- ii.) one or multiple dissolved activators including one or more humectants;
- wherein the admixture includes water and is capable of being applied in layers using the coater;
- and
- as a second material in a print head:
- iii.) a binder fluid for selectively applying over the admixture with the print head;
- wherein the humectant aids in a regulation of a moisture content of the admixture, so that a final strength may be achieved in a 3D printing process, even after a storage time of the admixture;
- wherein the admixture includes liquid bridges between particles of the particulate build material;
- wherein the one or more humectants comprises a phosphoric acid, a diphosphoric acid, a lactic acid, sodium chloride, calcium chloride, ammonium acetate, a salicylate, triacetin, glucose, sucrose, sorbitol, 1,2-propanediol, pentaerythritol, xylitol, or polyethylene glycol.
9 more elements
A material system for producing three-dimensional models by layering, the material system comprising:
- as a first material in a coater:
- an admixture including
- i.) a particulate build material;
- and
- ii.) one or multiple dissolved activators including one or more humectants;
- wherein the admixture includes water and is capable of being applied in layers using the coater;
- and
- as a second material in a print head:
- iii.) a binder fluid for selectively applying over the admixture with the print head;
- wherein the humectant aids in a regulation of a moisture content of the admixture, so that a final strength may be achieved in a 3D printing process, even after a storage time of the admixture;
- wherein the admixture includes liquid bridges between particles of the particulate build material;
- wherein the humectant includes sodium chloride, calcium chloride, ammonium acetate, a salicylate, triacetin, glucose, sucrose, or sorbitol.
9 more elements
A material system for producing three-dimensional models by layering, the material system comprising:
- as a first material in a coater:
- an admixture including
- i.) a particulate build material including a sand;
- and
- ii.) one or multiple dissolved activators including one or more humectants;
- wherein the admixture includes water and is capable of being applied in layers using the coater;
- and
- as a second material in a print head:
- iii.) a binder fluid for selectively applying over the admixture with the print head;
- wherein the humectant aids in a regulation of a moisture content of the admixture, so that a final strength may be achieved in a 3D printing process, even after a storage time of the admixture;
- wherein the admixture includes liquid bridges between particles of the particulate build material;
- wherein the binder fluid comprises 50 to 95 weight percent furfuryl alcohol;
- and
- the binder further comprises a wetting agent, an adhesive, or a cross-linking agent.
11 more elements
Dependencies are inferred from the claim text.