Indirect additive manufacturing process using amine-containing adhesive polymers

Patent · Tue Feb 22 04:00:00 EST 2022

OSTI ID:1892633

Saito, Tomonori; Elliott, Amy M.; Brunermer, Daniel T.; Gilmer, Dustin Blake; Lehmann, Mirko; Yu, Huayun

A method for binder jetting additive manufacturing of an object, the method comprising: (i) separately feeding a powder from which said object is to be manufactured and a solution comprising an adhesive polymer dissolved in a solvent into an additive manufacturing device, wherein said adhesive polymer is an amine-containing polymer having a molecular weight of at least 200 g/mole and is present in said solution in a concentration of 1-30 wt % to result in said solution having a viscosity of 2-25 mPa·s and a surface tension of 25-45 mN/m at room temperature; and (ii) dispensing selectively positioned droplets of said adhesive polymer, from a printhead of said additive manufacturing device, into a bed of said powder to bind particles of said powder with said adhesive polymer to produce a preform having a shape of the object to be manufactured.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); The ExOne Company, North Huntingdon, PA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• Assignee: UT-Battelle, LLC (Oak Ridge, TN); The ExOne Company (Huntingdon, PA)
• Patent Number(s): 11,254,617
• Application Number: 16/243,507
• OSTI ID: 1892633
• Country of Publication: United States
• Language: English