IN-SITU REACTIVE CURING AND INFILTRATION IN BINDER JET ADDITIVE MANUFACTURING

A method of binder jet additive manufacturing (BJAM) is provided. The method includes feeding a supply of powder particles to a powder bed, delivering an organic binder onto the powder bed in select locations of each layer to form a porous green part, and introducing to the binder a secondary compon...

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Bibliographische Detailangaben
Hauptverfasser:	Gilmer, Dustin B, Saito, Tomonori, Han, Lu, Elliott, Amelia M
Format:	Patent
Sprache:	eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CASTING MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of binder jet additive manufacturing (BJAM) is provided. The method includes feeding a supply of powder particles to a powder bed, delivering an organic binder onto the powder bed in select locations of each layer to form a porous green part, and introducing to the binder a secondary component that chemically reacts with the binder to form a solid polymer matrix around the powder particles. The secondary component is introduced either by: (i) infiltration of the secondary component into the porous green part; or (ii) by combining the secondary component with the powder particles prior to feeding the powder particles to the powder bed. A binder system for BJAM is also provided. The binder system includes a reactive pair including an organic binder that is capable of being deposited on a powder bed; and a secondary component that is reactive with the organic binder.