The present disclosure relates to a method of manufacturing a 3D printed object. The method comprises treating an outer surface of a 3D printed object with a dye condensing solvent vapour on the treated outer surface; and dissolving a portion of the treated outer surface in the condensed solvent to reduce the surface roughness of the 3D printed object.

According to the present disclosure, there is provided a method for processing a thermoplastic part using a carboxylic ester solvent. Advantageously, it has been found that carboxylic esters provide an effective and more environmentally friendly alternative to traditional alcohol-based solvents used for processing thermoplastic parts.

The invention relates to a method for the post-treatment of 3D objects (10) printed from a light-curing resin formulation. A 3D object (10) removed from a 3D printer is post-treated according to the following steps: a) exposing the surface (11) of the 3D object (10) to a post-treatment liquid (16) comprising a light-curing resin formulation for a prescribed exposure time, wherein the post-treatment liquid (16) and the exposure time are chosen such that the post-treatment liquid (16) can penetrate into a crack (12) or a pore (13) on the surface (11) of the 3D object within the exposure time as a result of capillarity; b) removing the post-treatment liquid (16) remaining on the surface of the 3D object (10); and c) irradiating the 3D object (10) with light for post-curing the light-curing resin formulation used for the printing of the 3D object (10) and curing the post-treatment liquid (16) that has penetrated into cracks (12) and/or pores (13) on the surface (11) of the 3D object (10).

A method for producing a 3D porous sorbent structure may include building a 3D porous green body from a build material including a solvent, an inorganic porous sorbent material, and an organic binder material dissolved in the solvent. The build material is deposited as filaments in a plurality of stacked layers to obtain the 3D porous green body, and at least some of the filaments are spaced apart; inducing phase inversion of the body by exposing it to a non-solvent for the organic binder material. The solidified body is dried to obtain the 3D porous sorbent structure. The build material has 30-70% by weight of the inorganic porous sorbent material and 5-30% by weight of the organic binder material, based on the total weight of the build material, the 3D porous sorbent structure comprising at least a portion of the organic binder material.

A powder removal apparatus includes an extraction housing comprising a sidewall that is sized and configured to extend around a powder bed of a build module and a top wall that is sized and configured to extend between opposite sides of the sidewall and over the powder bed. The sidewall and top wall are configured to form a chamber portion of a turbulence chamber. The top wall has a vacuum exit opening that is configured to fluidly connect to a vacuum source. The sidewall has a plurality of sidewall inlet flow channels that extend from an inlet opening at an exterior side of the sidewall to an outlet opening at an interior side of the sidewall. A side exit channel is configured to extend along the top wall from a collector opening in communication with the chamber portion toward the vacuum exit opening.

Provided are methods and compositions for the instant hydration of polyacrylamide articles. More particularly, a polyacrylamide powder is combined with a binding agent thereby resulting in a particulate composition that is instantly hydrated upon contact with an aqueous solvent. Also provided is a method of producing a polyacrylamide article from the particulate composition. The article is formed when the particulate composition cooled to form a cooled particulate composition. The cooled particulate composition can be dried, pressed, and/or molded. The article, when contacted with an aqueous solvent, quickly disintegrates or dissociates into individual particles, which dissolves into a homogenous solution.

A biological 3D printed multilayered scaffold is provided, which comprises a crosslinked native or non-modified protein containing a di-tyrosine matrix: the scaffold being configured for containing living cells introduced thereto during printing or post-printing.

The present invention relates to a system (100) for automatically processing an additively manufactured part. The system comprises an inspection module (120) for determining at least one part parameter associated with a surface finish quality of the part, a processing module (118) for processing a surface of the part responsive to the at least one part parameter and controller (102) configured to modify a processing parameter of a surface finishing process, performed by the processing module, based on the at least one part parameter determined by the inspection module.

A method for post-curing a 3D printing output and a transparent orthodontic device manufactured by the method are described. The method for post-curing a 3D printing output removes residual resin from printouts manufactured through a 3D printer, shortens the curing time by improving the curing speed through a post-curing process, and can manufacture printouts with improved strength and increased transparency. The transparent orthodontic device removes resin of the surface through the post-curing process when manufacturing a transparent orthodontic device, improves strength, not only has excellent transparency, but also enables unreacted monomers to be removed, and can exhibit shape memory characteristics that restore its shape to the initially printed-out shape of the transparent orthodontic device by the provision of heat.

Examples of the present disclosure are directed toward methods and system for reducing surface roughness of a cured three-dimensional (3D) printed object using a localized heat source. An example method includes applying a liquid solvent to the cured 3D printed object and heating the cured 3D printed object with the liquid solvent applied thereto to a temperature below a melting point of the cured 3D printed object using a localized heat source to reduce a surface roughness of the cured 3D printed object as compared to the cured 3D printed object prior to the application of heat.