A 3D printing cleaning module comprises an extraction gate at a lateral wall of a housing; and a platform within the housing to support a build bed including 3D printed parts and un-solidified build material. The platform is tilted or tiltable with respect to a horizontal plane towards the extraction gate to enable 3D printed parts on the platform to be removable through the extraction gate. The module comprises a cleaning engine to remove at least part of the un-solidified build material from the housing, a vibrating mechanism to vibrate the platform; and a controller. The controller is to control the cleaning engine to execute a cleaning operation by removing un-solidified build material from the housing, to cause the part ejection gate to open upon completion of the cleaning operation, and to cause the vibrating mechanism to vibrate the platform when the part extraction gate is in the open position.

A 3D printing cleaning module comprises an extraction gate at a lateral wall of a housing; and a platform within the housing to support a build bed including 3D printed parts and un-solidified build material. The platform is tilted or tiltable with respect to a horizontal plane towards the extraction gate to enable 3D printed parts on the platform to be removable through the extraction gate. The module comprises a cleaning engine to remove at least part of the un-solidified build material from the housing, a vibrating mechanism to vibrate the platform; and a controller. The controller is to control the cleaning engine to execute a cleaning operation by removing un-solidified build material from the housing, to cause the part ejection gate to open upon completion of the cleaning operation, and to cause the vibrating mechanism to vibrate the platform when the part extraction gate is in the open position.

A three-dimensional (3D) printer and method of additive manufacture are disclosed. The method includes building a three-dimensional (3D) object via a 3D printing process. After the 3D printing process, the 3D object is contained within a cake comprising the 3D object and partially fused excess build material. The method further includes vibrating the cake to loosen the excess build material. The frequency of the vibration is swept across a predetermined range of frequencies over a predetermined sweep interval.

A three-dimensional (3D) printer and method of additive manufacture are disclosed. The method includes building a three-dimensional (3D) object via a 3D printing process. After the 3D printing process, the 3D object is contained within a cake comprising the 3D object and partially fused excess build material. The method further includes vibrating the cake to loosen the excess build material. The frequency of the vibration is swept across a predetermined range of frequencies over a predetermined sweep interval.

An article of manufacture includes a part structure formed via a first additive manufacturing process and a floating structure within the part structure which is mechanically decoupled from the part structure. The floating structure is formed concurrently with the part structure via the first additive manufacturing process.

An article of manufacture includes a part structure formed via a first additive manufacturing process and a floating structure within the part structure which is mechanically decoupled from the part structure. The floating structure is formed concurrently with the part structure via the first additive manufacturing process.

Compositions or finishing solutions configured to remove unwanted material, such as uncured resin and ceramic filler, from surfaces of additively manufactured objects are disclosed herein. The finishing solutions may be configured to remove such uncured resin and ceramic filler through submersion of the object in the finishing solution and agitating the submerged object at an ultrasonic frequency, without subjecting the object to any subsequent mechanical acts (such as brushing, sanding, or bead blasting) to remove any remaining uncured resin and/or ceramic filler from the object. In one example, the finishing solution includes a first glycol ether and a second glycol ether and/or a high flash point hydrocarbon, wherein the finishing solution has a flash point of at least 93.3° C. In alternative examples, the finishing solution may also include a third glycol ether, a high flash point alcohol, and/or an acetate of a glycol ether.

Compositions or finishing solutions configured to remove unwanted material, such as uncured resin and ceramic filler, from surfaces of additively manufactured objects are disclosed herein. The finishing solutions may be configured to remove such uncured resin and ceramic filler through submersion of the object in the finishing solution and agitating the submerged object at an ultrasonic frequency, without subjecting the object to any subsequent mechanical acts (such as brushing, sanding, or bead blasting) to remove any remaining uncured resin and/or ceramic filler from the object. In one example, the finishing solution includes a first glycol ether and a second glycol ether and/or a high flash point hydrocarbon, wherein the finishing solution has a flash point of at least 93.3° C. In alternative examples, the finishing solution may also include a third glycol ether, a high flash point alcohol, and/or an acetate of a glycol ether.

An article of manufacture includes a part structure formed via a first additive manufacturing process and a floating structure within the part structure which is mechanically decoupled from the part structure. The floating structure is formed concurrently with the part structure via the first additive manufacturing process.

An article of manufacture includes a part structure formed via a first additive manufacturing process and a floating structure within the part structure which is mechanically decoupled from the part structure. The floating structure is formed concurrently with the part structure via the first additive manufacturing process.