Evolve Additive Solutions, Inc.

Arun Chowdry

J Samuel Batchelder

Steven A Chillscyzn

James W Comb

Chris Counts

Chris Anton

A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes developing a first layer of a powder material using at least one electrostatographic engine, supporting the developed first layer on a transfer medium, adjusting a first layer thermal profile of the developed first layer with a first thermal flux device, adding thermal energy to a part thermal profile that includes a bonding region of previously accumulated layers of the 3D part, transfusing the developed first layer on the bonding region of the previously accumulated layers of the 3D part, and removing thermal energy from the part thermal profile. A transfusion temperature at a start of the transfusing step can be equal to or greater than a transfusion threshold temperature, where the transfusion temperature is an average of the first layer thermal profile and the part thermal profile in the bonding region.

Thermal partitioning in an electrostatographic additive manufacturing system

A method of selective deposition-based additive manufacturing includes conveying a layer () of material to previously built layers () of material. A determination is made as to whether at least one of the conveyed layers () of material and a top previously built layer () of material contains an unsupported portion (). When at least one of the conveyed layer () of material and the top previously built layer () of material contains an unsupported portion, a first set of steps () are used to transfer the conveyed layer () of material to the top previously built layer () of material. When neither of the conveyed layer () of material and the top previously built layer () of material contains an unsupported portion, a second set of steps () are used to transfer the conveyed layer () of material to the top previously built layer () of material.

Building layers with unsupported portions through selective deposition-based additive manufacturing

An electrostatic-based layer-wise manufacturing system (e.g.,-) decouples a layer imaging process from a layer transfusion process. The layer imaging process is performed in a first batch process that is independent from the layer transfusion process that is performed in a second batch process.

Systems and methods for electrophotography-based additive manufacturing of parts utilizing multiple printing paths

In a method of producing a 3D part using an electrophotography-based additive manufacturing system, a plurality of layers of a powder-based material are developed using at least one electrophotography (EP) engine. The developed layers are transferred to a transfer medium. The layers on the transfer medium are dried by heating the layers without fully fusing the powder-based material to itself using a dryer. This reduces a water content of the layers. The dried layers are heated on the transfer medium to at least a fusion temperature, at which the power-based material fuses together, using a pre-transfusion heater. The dried layers are then transfused together on a build platform using a transfusion assembly to build the part in a layer-by-layer manner.

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Maple Grove, MN, United States of America

Arun Chowdry