Surface modified particulate and sintered or injection molded products
First Claim
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1. A method of making an object with an additive manufacturing system, the method comprises:
- depositing a filament, with the system comprising a digitally controlled applicator, in a controlled x-y plane with subsequent z-direction filament application to obtain a preform object;
the filament comprising;
about 70 to 1 wt. % of a thermoplastic polymer; and
about 99 to 30 wt. % of a metal particulate, dispersed in the polymer, the particulate having a particle size of less than 500 microns, and an exterior coating of interfacial modifier in an amount of about 0.02 to 2.0 wt. %, all percentages based on the weight of the filament; and
sintering the preform object to remove the polymer and bond the particulate forming the object.
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Abstract
Disclosed are interfacially modified particulate and polymer composite material for use in injection molding processes, such as metal injection molding and additive process such as 3D printing. The composite material is uniquely adapted for powder metallurgy processes. Improved products are provided under process conditions through surface modified powders that are produced by extrusion, injection molding, additive processes such as 3D printing, Press and Sinter, or rapid prototyping.
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Citations
9 Claims
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1. A method of making an object with an additive manufacturing system, the method comprises:
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depositing a filament, with the system comprising a digitally controlled applicator, in a controlled x-y plane with subsequent z-direction filament application to obtain a preform object;
the filament comprising;about 70 to 1 wt. % of a thermoplastic polymer; and about 99 to 30 wt. % of a metal particulate, dispersed in the polymer, the particulate having a particle size of less than 500 microns, and an exterior coating of interfacial modifier in an amount of about 0.02 to 2.0 wt. %, all percentages based on the weight of the filament; and sintering the preform object to remove the polymer and bond the particulate forming the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification