Provided is a method of making a cured object having a surface coating bonded thereto, which may include: providing an intermediate object produced in an additive manufacturing process such as stereolithography by light polymerization of a dual cure resin, the resin comprising a mixture of (i) a light polymerizable first component, and (ii) a second component that is different from the first component; applying a first reactive coating composition to a surface portion of the object to form a first coating thereon; optionally, but in some embodiments preferably, applying a second reactive coating composition to the first coating to form a second coating thereon; and heating the object at (and for) a time and to a temperature sufficient to bond the first coating to the surface portion, and bond the second coating when present to the first coating, and form the cured object having a surface coating bonded thereto.

Provided is a method of making a cured object having a surface coating bonded thereto, which may include: providing an intermediate object produced in an additive manufacturing process such as stereolithography by light polymerization of a dual cure resin, the resin comprising a mixture of (i) a light polymerizable first component, and (ii) a second component that is different from the first component; applying a first reactive coating composition to a surface portion of the object to form a first coating thereon; optionally, but in some embodiments preferably, applying a second reactive coating composition to the first coating to form a second coating thereon; and heating the object at (and for) a time and to a temperature sufficient to bond the first coating to the surface portion, and bond the second coating when present to the first coating, and form the cured object having a surface coating bonded thereto.

A filament container for housing a spool of filament comprising a base and a lid that define an inner volume. The lid rotatably attached to the base and moveable between a closed position, wherein the inner volume is substantially sealed, and an open position, wherein the inner volume is accessible. First and second horizontal shafts are supported rotatably within the inner volume, parallel to and spaced from one another a distance, and rotatable about a respective longitudinal axis. The first and second horizontal shafts are adapted to support a spool of filament vertically within the inner volume and to allow the spool of filament to freely rotate about a horizontal axis that is parallel to and spaced from the longitudinal axis of each of the first and second horizontal shafts as filament is pulled from the spool and out of the filament container.

Methods and apparatus comprising a dewetting material and a polymerization liquid that are immiscible and dewetting, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ the use of a flowing dewetting material to provide a shearing interface to reduce interfacial adhesive forces.

Methods and apparatus comprising a dewetting material and a polymerization liquid that are immiscible and dewetting, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ the use of a flowing dewetting material to provide a shearing interface to reduce interfacial adhesive forces.

A filament container for housing a spool of filament comprising a base and a lid that define an inner volume. The lid rotatably attached to the base and moveable between a closed position, wherein the inner volume is substantially sealed, and an open position, wherein the inner volume is accessible. First and second horizontal shafts are supported rotatably within the inner volume, parallel to and spaced from one another a distance, and rotatable about a respective longitudinal axis. The first and second horizontal shafts are adapted to support a spool of filament vertically within the inner volume and to allow the spool of filament to freely rotate about a horizontal axis that is parallel to and spaced from the longitudinal axis of each of the first and second horizontal shafts as filament is pulled from the spool and out of the filament container.

An additive manufacturing build material container comprises a reservoir to hold build material and a build material outlet structure.

An additive manufacturing build material container comprises a reservoir to hold build material and a build material outlet structure.

A stirring device for a powder tank of an apparatus for manufacturing a three-dimensional object. The stirring device is configured to rotate within the powder tank about an axis of rotation, and comprises a base plate and a strut. The strut extends from the base plate and is arranged to extend into the powder tank forming an obtuse angle with the outer edge of the base plate

Examples of a 3D printing apparatus arranged to perform a print operation using build material, and methods of operating such a 3D printing apparatus, are described. In one case, a 3D printer is arranged to perform a print operation using build material whilst a build material temperature sensed by the printer is below a threshold temperature of the build material. The printer is arranged to obtain a threshold temperature indicator in advance of a respective print operation.