Method and device for additive manufacturing by agglomeration of a granular material
AssigneeEcole Centrale De Nantes
InventorsJean-Yves Hascoët, Pascal Mognol, Tugdual Le Néel
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Abstract
A method for manufacturing a structure from a granular material, called sand, in particular a mold. A layer of sand is deposited. The layer of sand is selectively agglomerated by spraying, using a spray nozzle, an inorganic binder having an M2SiO3 type (meta)silicate dissolved in a solvent. Prior to the spraying, the inorganic binder is heated to a temperature to confer on it a viscosity less than 0.2 Pa·s. A device for implementing the method is provided.
Claims11
A method for manufacturing a structure from a granular material, the manufacturing comprising an additive manufacturing phase, the method comprising:
- depositing a layer of sand, the granular material being sand;
- selectively agglomerating the layer of sand by spraying, by using a spray nozzle, an inorganic binder comprising a M2SiO3 type (meta)silicate dissolved in a solvent, where M is selected from Na, K and Li individually or in combination, wherein the inorganic binder is heated prior to its spraying to a temperature between 30° C. and 100° C. so as to confer a viscosity less than 0.2 Pa·s to the inorganic binder;
- and wherein the inorganic binder comprises additives in form of nanoparticles in a colloidal suspension in the organic binder to modify a mechanical or thermal property of the structure.
Dependencies are inferred from the claim text.